1 | /***************************************************************************
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2 | * _ _ ____ _
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3 | * Project ___| | | | _ \| |
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4 | * / __| | | | |_) | |
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5 | * | (__| |_| | _ <| |___
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6 | * \___|\___/|_| \_\_____|
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7 | *
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8 | * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 | *
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10 | * This software is licensed as described in the file COPYING, which
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11 | * you should have received as part of this distribution. The terms
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12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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13 | *
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14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 | * copies of the Software, and permit persons to whom the Software is
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16 | * furnished to do so, under the terms of the COPYING file.
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17 | *
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18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 | * KIND, either express or implied.
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20 | *
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21 | * RFC2195 CRAM-MD5 authentication
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22 | * RFC2595 Using TLS with IMAP, POP3 and ACAP
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23 | * RFC2831 DIGEST-MD5 authentication
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24 | * RFC3501 IMAPv4 protocol
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25 | * RFC4422 Simple Authentication and Security Layer (SASL)
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26 | * RFC4616 PLAIN authentication
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27 | * RFC4752 The Kerberos V5 ("GSSAPI") SASL Mechanism
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28 | * RFC4959 IMAP Extension for SASL Initial Client Response
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29 | * RFC5092 IMAP URL Scheme
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30 | * RFC6749 OAuth 2.0 Authorization Framework
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31 | * Draft LOGIN SASL Mechanism <draft-murchison-sasl-login-00.txt>
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32 | *
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33 | ***************************************************************************/
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34 |
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35 | #include "curl_setup.h"
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36 |
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37 | #ifndef CURL_DISABLE_IMAP
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38 |
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39 | #ifdef HAVE_NETINET_IN_H
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40 | #include <netinet/in.h>
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41 | #endif
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42 | #ifdef HAVE_ARPA_INET_H
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43 | #include <arpa/inet.h>
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44 | #endif
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45 | #ifdef HAVE_UTSNAME_H
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46 | #include <sys/utsname.h>
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47 | #endif
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48 | #ifdef HAVE_NETDB_H
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49 | #include <netdb.h>
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50 | #endif
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51 | #ifdef __VMS
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52 | #include <in.h>
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53 | #include <inet.h>
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54 | #endif
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55 |
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56 | #if (defined(NETWARE) && defined(__NOVELL_LIBC__))
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57 | #undef in_addr_t
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58 | #define in_addr_t unsigned long
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59 | #endif
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60 |
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61 | #include <curl/curl.h>
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62 | #include "urldata.h"
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63 | #include "sendf.h"
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64 | #include "hostip.h"
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65 | #include "progress.h"
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66 | #include "transfer.h"
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67 | #include "escape.h"
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68 | #include "http.h" /* for HTTP proxy tunnel stuff */
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69 | #include "socks.h"
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70 | #include "imap.h"
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71 |
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72 | #include "strtoofft.h"
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73 | #include "strequal.h"
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74 | #include "vtls/vtls.h"
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75 | #include "connect.h"
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76 | #include "strerror.h"
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77 | #include "select.h"
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78 | #include "multiif.h"
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79 | #include "url.h"
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80 | #include "rawstr.h"
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81 | #include "curl_sasl.h"
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82 | #include "warnless.h"
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83 | #include "curl_printf.h"
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84 |
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85 | #include "curl_memory.h"
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86 | /* The last #include file should be: */
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87 | #include "memdebug.h"
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88 |
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89 | /* Local API functions */
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90 | static CURLcode imap_regular_transfer(struct connectdata *conn, bool *done);
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91 | static CURLcode imap_do(struct connectdata *conn, bool *done);
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92 | static CURLcode imap_done(struct connectdata *conn, CURLcode status,
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93 | bool premature);
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94 | static CURLcode imap_connect(struct connectdata *conn, bool *done);
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95 | static CURLcode imap_disconnect(struct connectdata *conn, bool dead);
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96 | static CURLcode imap_multi_statemach(struct connectdata *conn, bool *done);
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97 | static int imap_getsock(struct connectdata *conn, curl_socket_t *socks,
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98 | int numsocks);
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99 | static CURLcode imap_doing(struct connectdata *conn, bool *dophase_done);
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100 | static CURLcode imap_setup_connection(struct connectdata *conn);
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101 | static char *imap_atom(const char *str, bool escape_only);
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102 | static CURLcode imap_sendf(struct connectdata *conn, const char *fmt, ...);
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103 | static CURLcode imap_parse_url_options(struct connectdata *conn);
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104 | static CURLcode imap_parse_url_path(struct connectdata *conn);
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105 | static CURLcode imap_parse_custom_request(struct connectdata *conn);
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106 | static CURLcode imap_perform_authenticate(struct connectdata *conn,
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107 | const char *mech,
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108 | const char *initresp);
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109 | static CURLcode imap_continue_authenticate(struct connectdata *conn,
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110 | const char *resp);
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111 | static void imap_get_message(char *buffer, char** outptr);
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112 |
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113 | /*
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114 | * IMAP protocol handler.
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115 | */
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116 |
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117 | const struct Curl_handler Curl_handler_imap = {
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118 | "IMAP", /* scheme */
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119 | imap_setup_connection, /* setup_connection */
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120 | imap_do, /* do_it */
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121 | imap_done, /* done */
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122 | ZERO_NULL, /* do_more */
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123 | imap_connect, /* connect_it */
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124 | imap_multi_statemach, /* connecting */
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125 | imap_doing, /* doing */
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126 | imap_getsock, /* proto_getsock */
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127 | imap_getsock, /* doing_getsock */
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128 | ZERO_NULL, /* domore_getsock */
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129 | ZERO_NULL, /* perform_getsock */
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130 | imap_disconnect, /* disconnect */
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131 | ZERO_NULL, /* readwrite */
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132 | PORT_IMAP, /* defport */
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133 | CURLPROTO_IMAP, /* protocol */
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134 | PROTOPT_CLOSEACTION /* flags */
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135 | };
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136 |
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137 | #ifdef USE_SSL
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138 | /*
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139 | * IMAPS protocol handler.
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140 | */
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141 |
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142 | const struct Curl_handler Curl_handler_imaps = {
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143 | "IMAPS", /* scheme */
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144 | imap_setup_connection, /* setup_connection */
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145 | imap_do, /* do_it */
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146 | imap_done, /* done */
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147 | ZERO_NULL, /* do_more */
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148 | imap_connect, /* connect_it */
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149 | imap_multi_statemach, /* connecting */
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150 | imap_doing, /* doing */
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151 | imap_getsock, /* proto_getsock */
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152 | imap_getsock, /* doing_getsock */
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153 | ZERO_NULL, /* domore_getsock */
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154 | ZERO_NULL, /* perform_getsock */
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155 | imap_disconnect, /* disconnect */
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156 | ZERO_NULL, /* readwrite */
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157 | PORT_IMAPS, /* defport */
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158 | CURLPROTO_IMAPS, /* protocol */
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159 | PROTOPT_CLOSEACTION | PROTOPT_SSL /* flags */
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160 | };
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161 | #endif
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162 |
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163 | #ifndef CURL_DISABLE_HTTP
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164 | /*
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165 | * HTTP-proxyed IMAP protocol handler.
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166 | */
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167 |
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168 | static const struct Curl_handler Curl_handler_imap_proxy = {
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169 | "IMAP", /* scheme */
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170 | Curl_http_setup_conn, /* setup_connection */
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171 | Curl_http, /* do_it */
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172 | Curl_http_done, /* done */
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173 | ZERO_NULL, /* do_more */
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174 | ZERO_NULL, /* connect_it */
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175 | ZERO_NULL, /* connecting */
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176 | ZERO_NULL, /* doing */
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177 | ZERO_NULL, /* proto_getsock */
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178 | ZERO_NULL, /* doing_getsock */
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179 | ZERO_NULL, /* domore_getsock */
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180 | ZERO_NULL, /* perform_getsock */
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181 | ZERO_NULL, /* disconnect */
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182 | ZERO_NULL, /* readwrite */
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183 | PORT_IMAP, /* defport */
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184 | CURLPROTO_HTTP, /* protocol */
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185 | PROTOPT_NONE /* flags */
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186 | };
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187 |
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188 | #ifdef USE_SSL
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189 | /*
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190 | * HTTP-proxyed IMAPS protocol handler.
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191 | */
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192 |
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193 | static const struct Curl_handler Curl_handler_imaps_proxy = {
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194 | "IMAPS", /* scheme */
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195 | Curl_http_setup_conn, /* setup_connection */
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196 | Curl_http, /* do_it */
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197 | Curl_http_done, /* done */
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198 | ZERO_NULL, /* do_more */
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199 | ZERO_NULL, /* connect_it */
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200 | ZERO_NULL, /* connecting */
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201 | ZERO_NULL, /* doing */
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202 | ZERO_NULL, /* proto_getsock */
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203 | ZERO_NULL, /* doing_getsock */
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204 | ZERO_NULL, /* domore_getsock */
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205 | ZERO_NULL, /* perform_getsock */
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206 | ZERO_NULL, /* disconnect */
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207 | ZERO_NULL, /* readwrite */
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208 | PORT_IMAPS, /* defport */
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209 | CURLPROTO_HTTP, /* protocol */
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210 | PROTOPT_NONE /* flags */
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211 | };
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212 | #endif
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213 | #endif
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214 |
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215 | /* SASL parameters for the imap protocol */
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216 | static const struct SASLproto saslimap = {
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217 | "imap", /* The service name */
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218 | '+', /* Code received when continuation is expected */
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219 | 'O', /* Code to receive upon authentication success */
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220 | 0, /* Maximum initial response length (no max) */
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221 | imap_perform_authenticate, /* Send authentication command */
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222 | imap_continue_authenticate, /* Send authentication continuation */
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223 | imap_get_message /* Get SASL response message */
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224 | };
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225 |
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226 |
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227 | #ifdef USE_SSL
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228 | static void imap_to_imaps(struct connectdata *conn)
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229 | {
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230 | conn->handler = &Curl_handler_imaps;
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231 | }
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232 | #else
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233 | #define imap_to_imaps(x) Curl_nop_stmt
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234 | #endif
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235 |
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236 | /***********************************************************************
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237 | *
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238 | * imap_matchresp()
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239 | *
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240 | * Determines whether the untagged response is related to the specified
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241 | * command by checking if it is in format "* <command-name> ..." or
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242 | * "* <number> <command-name> ...".
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243 | *
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244 | * The "* " marker is assumed to have already been checked by the caller.
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245 | */
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246 | static bool imap_matchresp(const char *line, size_t len, const char *cmd)
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247 | {
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248 | const char *end = line + len;
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249 | size_t cmd_len = strlen(cmd);
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250 |
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251 | /* Skip the untagged response marker */
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252 | line += 2;
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253 |
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254 | /* Do we have a number after the marker? */
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255 | if(line < end && ISDIGIT(*line)) {
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256 | /* Skip the number */
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257 | do
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258 | line++;
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259 | while(line < end && ISDIGIT(*line));
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260 |
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261 | /* Do we have the space character? */
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262 | if(line == end || *line != ' ')
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263 | return FALSE;
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264 |
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265 | line++;
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266 | }
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267 |
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268 | /* Does the command name match and is it followed by a space character or at
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269 | the end of line? */
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270 | if(line + cmd_len <= end && Curl_raw_nequal(line, cmd, cmd_len) &&
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271 | (line[cmd_len] == ' ' || line + cmd_len + 2 == end))
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272 | return TRUE;
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273 |
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274 | return FALSE;
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275 | }
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276 |
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277 | /***********************************************************************
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278 | *
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279 | * imap_endofresp()
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280 | *
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281 | * Checks whether the given string is a valid tagged, untagged or continuation
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282 | * response which can be processed by the response handler.
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283 | */
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284 | static bool imap_endofresp(struct connectdata *conn, char *line, size_t len,
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285 | int *resp)
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286 | {
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287 | struct IMAP *imap = conn->data->req.protop;
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288 | struct imap_conn *imapc = &conn->proto.imapc;
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289 | const char *id = imapc->resptag;
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290 | size_t id_len = strlen(id);
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291 |
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292 | /* Do we have a tagged command response? */
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293 | if(len >= id_len + 1 && !memcmp(id, line, id_len) && line[id_len] == ' ') {
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294 | line += id_len + 1;
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295 | len -= id_len + 1;
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296 |
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297 | if(len >= 2 && !memcmp(line, "OK", 2))
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298 | *resp = 'O';
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299 | else if(len >= 2 && !memcmp(line, "NO", 2))
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300 | *resp = 'N';
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301 | else if(len >= 3 && !memcmp(line, "BAD", 3))
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302 | *resp = 'B';
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303 | else {
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304 | failf(conn->data, "Bad tagged response");
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305 | *resp = -1;
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306 | }
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307 |
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308 | return TRUE;
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309 | }
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310 |
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311 | /* Do we have an untagged command response? */
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312 | if(len >= 2 && !memcmp("* ", line, 2)) {
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313 | switch(imapc->state) {
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314 | /* States which are interested in untagged responses */
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315 | case IMAP_CAPABILITY:
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316 | if(!imap_matchresp(line, len, "CAPABILITY"))
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317 | return FALSE;
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318 | break;
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319 |
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320 | case IMAP_LIST:
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321 | if((!imap->custom && !imap_matchresp(line, len, "LIST")) ||
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322 | (imap->custom && !imap_matchresp(line, len, imap->custom) &&
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323 | (strcmp(imap->custom, "STORE") ||
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324 | !imap_matchresp(line, len, "FETCH")) &&
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325 | strcmp(imap->custom, "SELECT") &&
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326 | strcmp(imap->custom, "EXAMINE") &&
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327 | strcmp(imap->custom, "SEARCH") &&
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328 | strcmp(imap->custom, "EXPUNGE") &&
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329 | strcmp(imap->custom, "LSUB") &&
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330 | strcmp(imap->custom, "UID") &&
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331 | strcmp(imap->custom, "NOOP")))
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332 | return FALSE;
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333 | break;
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334 |
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335 | case IMAP_SELECT:
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336 | /* SELECT is special in that its untagged responses do not have a
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337 | common prefix so accept anything! */
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338 | break;
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339 |
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340 | case IMAP_FETCH:
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341 | if(!imap_matchresp(line, len, "FETCH"))
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342 | return FALSE;
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343 | break;
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344 |
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345 | case IMAP_SEARCH:
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346 | if(!imap_matchresp(line, len, "SEARCH"))
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347 | return FALSE;
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348 | break;
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349 |
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350 | /* Ignore other untagged responses */
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351 | default:
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352 | return FALSE;
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353 | }
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354 |
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355 | *resp = '*';
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356 | return TRUE;
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357 | }
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358 |
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359 | /* Do we have a continuation response? This should be a + symbol followed by
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360 | a space and optionally some text as per RFC-3501 for the AUTHENTICATE and
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361 | APPEND commands and as outlined in Section 4. Examples of RFC-4959 but
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362 | some e-mail servers ignore this and only send a single + instead. */
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363 | if(!imap->custom && ((len == 3 && !memcmp("+", line, 1)) ||
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364 | (len >= 2 && !memcmp("+ ", line, 2)))) {
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365 | switch(imapc->state) {
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366 | /* States which are interested in continuation responses */
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367 | case IMAP_AUTHENTICATE:
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368 | case IMAP_APPEND:
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369 | *resp = '+';
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370 | break;
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371 |
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372 | default:
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373 | failf(conn->data, "Unexpected continuation response");
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374 | *resp = -1;
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375 | break;
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376 | }
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377 |
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378 | return TRUE;
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379 | }
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380 |
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381 | return FALSE; /* Nothing for us */
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382 | }
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383 |
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384 | /***********************************************************************
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385 | *
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386 | * imap_get_message()
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387 | *
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388 | * Gets the authentication message from the response buffer.
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389 | */
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390 | static void imap_get_message(char *buffer, char** outptr)
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391 | {
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392 | size_t len = 0;
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393 | char* message = NULL;
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394 |
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395 | /* Find the start of the message */
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396 | for(message = buffer + 2; *message == ' ' || *message == '\t'; message++)
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397 | ;
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398 |
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399 | /* Find the end of the message */
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400 | for(len = strlen(message); len--;)
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401 | if(message[len] != '\r' && message[len] != '\n' && message[len] != ' ' &&
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402 | message[len] != '\t')
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403 | break;
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404 |
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405 | /* Terminate the message */
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406 | if(++len) {
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407 | message[len] = '\0';
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408 | }
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409 |
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410 | *outptr = message;
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411 | }
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412 |
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413 | /***********************************************************************
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414 | *
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415 | * state()
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416 | *
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417 | * This is the ONLY way to change IMAP state!
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418 | */
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419 | static void state(struct connectdata *conn, imapstate newstate)
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420 | {
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421 | struct imap_conn *imapc = &conn->proto.imapc;
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422 | #if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
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423 | /* for debug purposes */
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424 | static const char * const names[]={
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425 | "STOP",
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426 | "SERVERGREET",
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427 | "CAPABILITY",
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428 | "STARTTLS",
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429 | "UPGRADETLS",
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430 | "AUTHENTICATE",
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431 | "LOGIN",
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432 | "LIST",
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433 | "SELECT",
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434 | "FETCH",
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435 | "FETCH_FINAL",
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436 | "APPEND",
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437 | "APPEND_FINAL",
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438 | "SEARCH",
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439 | "LOGOUT",
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440 | /* LAST */
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441 | };
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442 |
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443 | if(imapc->state != newstate)
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444 | infof(conn->data, "IMAP %p state change from %s to %s\n",
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445 | (void *)imapc, names[imapc->state], names[newstate]);
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446 | #endif
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447 |
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448 | imapc->state = newstate;
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449 | }
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450 |
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451 | /***********************************************************************
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452 | *
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453 | * imap_perform_capability()
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454 | *
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455 | * Sends the CAPABILITY command in order to obtain a list of server side
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456 | * supported capabilities.
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457 | */
|
---|
458 | static CURLcode imap_perform_capability(struct connectdata *conn)
|
---|
459 | {
|
---|
460 | CURLcode result = CURLE_OK;
|
---|
461 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
462 |
|
---|
463 | imapc->sasl.authmechs = SASL_AUTH_NONE; /* No known auth. mechanisms yet */
|
---|
464 | imapc->sasl.authused = SASL_AUTH_NONE; /* Clear the auth. mechanism used */
|
---|
465 | imapc->tls_supported = FALSE; /* Clear the TLS capability */
|
---|
466 |
|
---|
467 | /* Send the CAPABILITY command */
|
---|
468 | result = imap_sendf(conn, "CAPABILITY");
|
---|
469 |
|
---|
470 | if(!result)
|
---|
471 | state(conn, IMAP_CAPABILITY);
|
---|
472 |
|
---|
473 | return result;
|
---|
474 | }
|
---|
475 |
|
---|
476 | /***********************************************************************
|
---|
477 | *
|
---|
478 | * imap_perform_starttls()
|
---|
479 | *
|
---|
480 | * Sends the STARTTLS command to start the upgrade to TLS.
|
---|
481 | */
|
---|
482 | static CURLcode imap_perform_starttls(struct connectdata *conn)
|
---|
483 | {
|
---|
484 | CURLcode result = CURLE_OK;
|
---|
485 |
|
---|
486 | /* Send the STARTTLS command */
|
---|
487 | result = imap_sendf(conn, "STARTTLS");
|
---|
488 |
|
---|
489 | if(!result)
|
---|
490 | state(conn, IMAP_STARTTLS);
|
---|
491 |
|
---|
492 | return result;
|
---|
493 | }
|
---|
494 |
|
---|
495 | /***********************************************************************
|
---|
496 | *
|
---|
497 | * imap_perform_upgrade_tls()
|
---|
498 | *
|
---|
499 | * Performs the upgrade to TLS.
|
---|
500 | */
|
---|
501 | static CURLcode imap_perform_upgrade_tls(struct connectdata *conn)
|
---|
502 | {
|
---|
503 | CURLcode result = CURLE_OK;
|
---|
504 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
505 |
|
---|
506 | /* Start the SSL connection */
|
---|
507 | result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &imapc->ssldone);
|
---|
508 |
|
---|
509 | if(!result) {
|
---|
510 | if(imapc->state != IMAP_UPGRADETLS)
|
---|
511 | state(conn, IMAP_UPGRADETLS);
|
---|
512 |
|
---|
513 | if(imapc->ssldone) {
|
---|
514 | imap_to_imaps(conn);
|
---|
515 | result = imap_perform_capability(conn);
|
---|
516 | }
|
---|
517 | }
|
---|
518 |
|
---|
519 | return result;
|
---|
520 | }
|
---|
521 |
|
---|
522 | /***********************************************************************
|
---|
523 | *
|
---|
524 | * imap_perform_login()
|
---|
525 | *
|
---|
526 | * Sends a clear text LOGIN command to authenticate with.
|
---|
527 | */
|
---|
528 | static CURLcode imap_perform_login(struct connectdata *conn)
|
---|
529 | {
|
---|
530 | CURLcode result = CURLE_OK;
|
---|
531 | char *user;
|
---|
532 | char *passwd;
|
---|
533 |
|
---|
534 | /* Check we have a username and password to authenticate with and end the
|
---|
535 | connect phase if we don't */
|
---|
536 | if(!conn->bits.user_passwd) {
|
---|
537 | state(conn, IMAP_STOP);
|
---|
538 |
|
---|
539 | return result;
|
---|
540 | }
|
---|
541 |
|
---|
542 | /* Make sure the username and password are in the correct atom format */
|
---|
543 | user = imap_atom(conn->user, false);
|
---|
544 | passwd = imap_atom(conn->passwd, false);
|
---|
545 |
|
---|
546 | /* Send the LOGIN command */
|
---|
547 | result = imap_sendf(conn, "LOGIN %s %s", user ? user : "",
|
---|
548 | passwd ? passwd : "");
|
---|
549 |
|
---|
550 | free(user);
|
---|
551 | free(passwd);
|
---|
552 |
|
---|
553 | if(!result)
|
---|
554 | state(conn, IMAP_LOGIN);
|
---|
555 |
|
---|
556 | return result;
|
---|
557 | }
|
---|
558 |
|
---|
559 | /***********************************************************************
|
---|
560 | *
|
---|
561 | * imap_perform_authenticate()
|
---|
562 | *
|
---|
563 | * Sends an AUTHENTICATE command allowing the client to login with the given
|
---|
564 | * SASL authentication mechanism.
|
---|
565 | */
|
---|
566 | static CURLcode imap_perform_authenticate(struct connectdata *conn,
|
---|
567 | const char *mech,
|
---|
568 | const char *initresp)
|
---|
569 | {
|
---|
570 | CURLcode result = CURLE_OK;
|
---|
571 |
|
---|
572 | if(initresp) {
|
---|
573 | /* Send the AUTHENTICATE command with the initial response */
|
---|
574 | result = imap_sendf(conn, "AUTHENTICATE %s %s", mech, initresp);
|
---|
575 | }
|
---|
576 | else {
|
---|
577 | /* Send the AUTHENTICATE command */
|
---|
578 | result = imap_sendf(conn, "AUTHENTICATE %s", mech);
|
---|
579 | }
|
---|
580 |
|
---|
581 | return result;
|
---|
582 | }
|
---|
583 |
|
---|
584 | /***********************************************************************
|
---|
585 | *
|
---|
586 | * imap_continue_authenticate()
|
---|
587 | *
|
---|
588 | * Sends SASL continuation data or cancellation.
|
---|
589 | */
|
---|
590 | static CURLcode imap_continue_authenticate(struct connectdata *conn,
|
---|
591 | const char *resp)
|
---|
592 | {
|
---|
593 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
594 |
|
---|
595 | return Curl_pp_sendf(&imapc->pp, "%s", resp);
|
---|
596 | }
|
---|
597 |
|
---|
598 | /***********************************************************************
|
---|
599 | *
|
---|
600 | * imap_perform_authentication()
|
---|
601 | *
|
---|
602 | * Initiates the authentication sequence, with the appropriate SASL
|
---|
603 | * authentication mechanism, falling back to clear text should a common
|
---|
604 | * mechanism not be available between the client and server.
|
---|
605 | */
|
---|
606 | static CURLcode imap_perform_authentication(struct connectdata *conn)
|
---|
607 | {
|
---|
608 | CURLcode result = CURLE_OK;
|
---|
609 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
610 | saslprogress progress;
|
---|
611 |
|
---|
612 | /* Check we have enough data to authenticate with and end the
|
---|
613 | connect phase if we don't */
|
---|
614 | if(!Curl_sasl_can_authenticate(&imapc->sasl, conn)) {
|
---|
615 | state(conn, IMAP_STOP);
|
---|
616 | return result;
|
---|
617 | }
|
---|
618 |
|
---|
619 | /* Calculate the SASL login details */
|
---|
620 | result = Curl_sasl_start(&imapc->sasl, conn, imapc->ir_supported, &progress);
|
---|
621 |
|
---|
622 | if(!result) {
|
---|
623 | if(progress == SASL_INPROGRESS)
|
---|
624 | state(conn, IMAP_AUTHENTICATE);
|
---|
625 | else if(!imapc->login_disabled && (imapc->preftype & IMAP_TYPE_CLEARTEXT))
|
---|
626 | /* Perform clear text authentication */
|
---|
627 | result = imap_perform_login(conn);
|
---|
628 | else {
|
---|
629 | /* Other mechanisms not supported */
|
---|
630 | infof(conn->data, "No known authentication mechanisms supported!\n");
|
---|
631 | result = CURLE_LOGIN_DENIED;
|
---|
632 | }
|
---|
633 | }
|
---|
634 |
|
---|
635 | return result;
|
---|
636 | }
|
---|
637 |
|
---|
638 | /***********************************************************************
|
---|
639 | *
|
---|
640 | * imap_perform_list()
|
---|
641 | *
|
---|
642 | * Sends a LIST command or an alternative custom request.
|
---|
643 | */
|
---|
644 | static CURLcode imap_perform_list(struct connectdata *conn)
|
---|
645 | {
|
---|
646 | CURLcode result = CURLE_OK;
|
---|
647 | struct SessionHandle *data = conn->data;
|
---|
648 | struct IMAP *imap = data->req.protop;
|
---|
649 | char *mailbox;
|
---|
650 |
|
---|
651 | if(imap->custom)
|
---|
652 | /* Send the custom request */
|
---|
653 | result = imap_sendf(conn, "%s%s", imap->custom,
|
---|
654 | imap->custom_params ? imap->custom_params : "");
|
---|
655 | else {
|
---|
656 | /* Make sure the mailbox is in the correct atom format if necessary */
|
---|
657 | mailbox = imap->mailbox ? imap_atom(imap->mailbox, true) : strdup("");
|
---|
658 | if(!mailbox)
|
---|
659 | return CURLE_OUT_OF_MEMORY;
|
---|
660 |
|
---|
661 | /* Send the LIST command */
|
---|
662 | result = imap_sendf(conn, "LIST \"%s\" *", mailbox);
|
---|
663 |
|
---|
664 | free(mailbox);
|
---|
665 | }
|
---|
666 |
|
---|
667 | if(!result)
|
---|
668 | state(conn, IMAP_LIST);
|
---|
669 |
|
---|
670 | return result;
|
---|
671 | }
|
---|
672 |
|
---|
673 | /***********************************************************************
|
---|
674 | *
|
---|
675 | * imap_perform_select()
|
---|
676 | *
|
---|
677 | * Sends a SELECT command to ask the server to change the selected mailbox.
|
---|
678 | */
|
---|
679 | static CURLcode imap_perform_select(struct connectdata *conn)
|
---|
680 | {
|
---|
681 | CURLcode result = CURLE_OK;
|
---|
682 | struct SessionHandle *data = conn->data;
|
---|
683 | struct IMAP *imap = data->req.protop;
|
---|
684 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
685 | char *mailbox;
|
---|
686 |
|
---|
687 | /* Invalidate old information as we are switching mailboxes */
|
---|
688 | Curl_safefree(imapc->mailbox);
|
---|
689 | Curl_safefree(imapc->mailbox_uidvalidity);
|
---|
690 |
|
---|
691 | /* Check we have a mailbox */
|
---|
692 | if(!imap->mailbox) {
|
---|
693 | failf(conn->data, "Cannot SELECT without a mailbox.");
|
---|
694 | return CURLE_URL_MALFORMAT;
|
---|
695 | }
|
---|
696 |
|
---|
697 | /* Make sure the mailbox is in the correct atom format */
|
---|
698 | mailbox = imap_atom(imap->mailbox, false);
|
---|
699 | if(!mailbox)
|
---|
700 | return CURLE_OUT_OF_MEMORY;
|
---|
701 |
|
---|
702 | /* Send the SELECT command */
|
---|
703 | result = imap_sendf(conn, "SELECT %s", mailbox);
|
---|
704 |
|
---|
705 | free(mailbox);
|
---|
706 |
|
---|
707 | if(!result)
|
---|
708 | state(conn, IMAP_SELECT);
|
---|
709 |
|
---|
710 | return result;
|
---|
711 | }
|
---|
712 |
|
---|
713 | /***********************************************************************
|
---|
714 | *
|
---|
715 | * imap_perform_fetch()
|
---|
716 | *
|
---|
717 | * Sends a FETCH command to initiate the download of a message.
|
---|
718 | */
|
---|
719 | static CURLcode imap_perform_fetch(struct connectdata *conn)
|
---|
720 | {
|
---|
721 | CURLcode result = CURLE_OK;
|
---|
722 | struct IMAP *imap = conn->data->req.protop;
|
---|
723 |
|
---|
724 | /* Check we have a UID */
|
---|
725 | if(!imap->uid) {
|
---|
726 | failf(conn->data, "Cannot FETCH without a UID.");
|
---|
727 | return CURLE_URL_MALFORMAT;
|
---|
728 | }
|
---|
729 |
|
---|
730 | /* Send the FETCH command */
|
---|
731 | if(imap->partial)
|
---|
732 | result = imap_sendf(conn, "FETCH %s BODY[%s]<%s>",
|
---|
733 | imap->uid,
|
---|
734 | imap->section ? imap->section : "",
|
---|
735 | imap->partial);
|
---|
736 | else
|
---|
737 | result = imap_sendf(conn, "FETCH %s BODY[%s]",
|
---|
738 | imap->uid,
|
---|
739 | imap->section ? imap->section : "");
|
---|
740 |
|
---|
741 | if(!result)
|
---|
742 | state(conn, IMAP_FETCH);
|
---|
743 |
|
---|
744 | return result;
|
---|
745 | }
|
---|
746 |
|
---|
747 | /***********************************************************************
|
---|
748 | *
|
---|
749 | * imap_perform_append()
|
---|
750 | *
|
---|
751 | * Sends an APPEND command to initiate the upload of a message.
|
---|
752 | */
|
---|
753 | static CURLcode imap_perform_append(struct connectdata *conn)
|
---|
754 | {
|
---|
755 | CURLcode result = CURLE_OK;
|
---|
756 | struct IMAP *imap = conn->data->req.protop;
|
---|
757 | char *mailbox;
|
---|
758 |
|
---|
759 | /* Check we have a mailbox */
|
---|
760 | if(!imap->mailbox) {
|
---|
761 | failf(conn->data, "Cannot APPEND without a mailbox.");
|
---|
762 | return CURLE_URL_MALFORMAT;
|
---|
763 | }
|
---|
764 |
|
---|
765 | /* Check we know the size of the upload */
|
---|
766 | if(conn->data->state.infilesize < 0) {
|
---|
767 | failf(conn->data, "Cannot APPEND with unknown input file size\n");
|
---|
768 | return CURLE_UPLOAD_FAILED;
|
---|
769 | }
|
---|
770 |
|
---|
771 | /* Make sure the mailbox is in the correct atom format */
|
---|
772 | mailbox = imap_atom(imap->mailbox, false);
|
---|
773 | if(!mailbox)
|
---|
774 | return CURLE_OUT_OF_MEMORY;
|
---|
775 |
|
---|
776 | /* Send the APPEND command */
|
---|
777 | result = imap_sendf(conn, "APPEND %s (\\Seen) {%" CURL_FORMAT_CURL_OFF_T "}",
|
---|
778 | mailbox, conn->data->state.infilesize);
|
---|
779 |
|
---|
780 | free(mailbox);
|
---|
781 |
|
---|
782 | if(!result)
|
---|
783 | state(conn, IMAP_APPEND);
|
---|
784 |
|
---|
785 | return result;
|
---|
786 | }
|
---|
787 |
|
---|
788 | /***********************************************************************
|
---|
789 | *
|
---|
790 | * imap_perform_search()
|
---|
791 | *
|
---|
792 | * Sends a SEARCH command.
|
---|
793 | */
|
---|
794 | static CURLcode imap_perform_search(struct connectdata *conn)
|
---|
795 | {
|
---|
796 | CURLcode result = CURLE_OK;
|
---|
797 | struct IMAP *imap = conn->data->req.protop;
|
---|
798 |
|
---|
799 | /* Check we have a query string */
|
---|
800 | if(!imap->query) {
|
---|
801 | failf(conn->data, "Cannot SEARCH without a query string.");
|
---|
802 | return CURLE_URL_MALFORMAT;
|
---|
803 | }
|
---|
804 |
|
---|
805 | /* Send the SEARCH command */
|
---|
806 | result = imap_sendf(conn, "SEARCH %s", imap->query);
|
---|
807 |
|
---|
808 | if(!result)
|
---|
809 | state(conn, IMAP_SEARCH);
|
---|
810 |
|
---|
811 | return result;
|
---|
812 | }
|
---|
813 |
|
---|
814 | /***********************************************************************
|
---|
815 | *
|
---|
816 | * imap_perform_logout()
|
---|
817 | *
|
---|
818 | * Performs the logout action prior to sclose() being called.
|
---|
819 | */
|
---|
820 | static CURLcode imap_perform_logout(struct connectdata *conn)
|
---|
821 | {
|
---|
822 | CURLcode result = CURLE_OK;
|
---|
823 |
|
---|
824 | /* Send the LOGOUT command */
|
---|
825 | result = imap_sendf(conn, "LOGOUT");
|
---|
826 |
|
---|
827 | if(!result)
|
---|
828 | state(conn, IMAP_LOGOUT);
|
---|
829 |
|
---|
830 | return result;
|
---|
831 | }
|
---|
832 |
|
---|
833 | /* For the initial server greeting */
|
---|
834 | static CURLcode imap_state_servergreet_resp(struct connectdata *conn,
|
---|
835 | int imapcode,
|
---|
836 | imapstate instate)
|
---|
837 | {
|
---|
838 | CURLcode result = CURLE_OK;
|
---|
839 | struct SessionHandle *data = conn->data;
|
---|
840 |
|
---|
841 | (void)instate; /* no use for this yet */
|
---|
842 |
|
---|
843 | if(imapcode != 'O') {
|
---|
844 | failf(data, "Got unexpected imap-server response");
|
---|
845 | result = CURLE_FTP_WEIRD_SERVER_REPLY; /* TODO: fix this code */
|
---|
846 | }
|
---|
847 | else
|
---|
848 | result = imap_perform_capability(conn);
|
---|
849 |
|
---|
850 | return result;
|
---|
851 | }
|
---|
852 |
|
---|
853 | /* For CAPABILITY responses */
|
---|
854 | static CURLcode imap_state_capability_resp(struct connectdata *conn,
|
---|
855 | int imapcode,
|
---|
856 | imapstate instate)
|
---|
857 | {
|
---|
858 | CURLcode result = CURLE_OK;
|
---|
859 | struct SessionHandle *data = conn->data;
|
---|
860 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
861 | const char *line = data->state.buffer;
|
---|
862 | size_t wordlen;
|
---|
863 |
|
---|
864 | (void)instate; /* no use for this yet */
|
---|
865 |
|
---|
866 | /* Do we have a untagged response? */
|
---|
867 | if(imapcode == '*') {
|
---|
868 | line += 2;
|
---|
869 |
|
---|
870 | /* Loop through the data line */
|
---|
871 | for(;;) {
|
---|
872 | while(*line &&
|
---|
873 | (*line == ' ' || *line == '\t' ||
|
---|
874 | *line == '\r' || *line == '\n')) {
|
---|
875 |
|
---|
876 | line++;
|
---|
877 | }
|
---|
878 |
|
---|
879 | if(!*line)
|
---|
880 | break;
|
---|
881 |
|
---|
882 | /* Extract the word */
|
---|
883 | for(wordlen = 0; line[wordlen] && line[wordlen] != ' ' &&
|
---|
884 | line[wordlen] != '\t' && line[wordlen] != '\r' &&
|
---|
885 | line[wordlen] != '\n';)
|
---|
886 | wordlen++;
|
---|
887 |
|
---|
888 | /* Does the server support the STARTTLS capability? */
|
---|
889 | if(wordlen == 8 && !memcmp(line, "STARTTLS", 8))
|
---|
890 | imapc->tls_supported = TRUE;
|
---|
891 |
|
---|
892 | /* Has the server explicitly disabled clear text authentication? */
|
---|
893 | else if(wordlen == 13 && !memcmp(line, "LOGINDISABLED", 13))
|
---|
894 | imapc->login_disabled = TRUE;
|
---|
895 |
|
---|
896 | /* Does the server support the SASL-IR capability? */
|
---|
897 | else if(wordlen == 7 && !memcmp(line, "SASL-IR", 7))
|
---|
898 | imapc->ir_supported = TRUE;
|
---|
899 |
|
---|
900 | /* Do we have a SASL based authentication mechanism? */
|
---|
901 | else if(wordlen > 5 && !memcmp(line, "AUTH=", 5)) {
|
---|
902 | size_t llen;
|
---|
903 | unsigned int mechbit;
|
---|
904 |
|
---|
905 | line += 5;
|
---|
906 | wordlen -= 5;
|
---|
907 |
|
---|
908 | /* Test the word for a matching authentication mechanism */
|
---|
909 | if((mechbit = Curl_sasl_decode_mech(line, wordlen, &llen)) &&
|
---|
910 | llen == wordlen)
|
---|
911 | imapc->sasl.authmechs |= mechbit;
|
---|
912 | }
|
---|
913 |
|
---|
914 | line += wordlen;
|
---|
915 | }
|
---|
916 | }
|
---|
917 | else if(imapcode == 'O') {
|
---|
918 | if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) {
|
---|
919 | /* We don't have a SSL/TLS connection yet, but SSL is requested */
|
---|
920 | if(imapc->tls_supported)
|
---|
921 | /* Switch to TLS connection now */
|
---|
922 | result = imap_perform_starttls(conn);
|
---|
923 | else if(data->set.use_ssl == CURLUSESSL_TRY)
|
---|
924 | /* Fallback and carry on with authentication */
|
---|
925 | result = imap_perform_authentication(conn);
|
---|
926 | else {
|
---|
927 | failf(data, "STARTTLS not supported.");
|
---|
928 | result = CURLE_USE_SSL_FAILED;
|
---|
929 | }
|
---|
930 | }
|
---|
931 | else
|
---|
932 | result = imap_perform_authentication(conn);
|
---|
933 | }
|
---|
934 | else
|
---|
935 | result = imap_perform_authentication(conn);
|
---|
936 |
|
---|
937 | return result;
|
---|
938 | }
|
---|
939 |
|
---|
940 | /* For STARTTLS responses */
|
---|
941 | static CURLcode imap_state_starttls_resp(struct connectdata *conn,
|
---|
942 | int imapcode,
|
---|
943 | imapstate instate)
|
---|
944 | {
|
---|
945 | CURLcode result = CURLE_OK;
|
---|
946 | struct SessionHandle *data = conn->data;
|
---|
947 |
|
---|
948 | (void)instate; /* no use for this yet */
|
---|
949 |
|
---|
950 | if(imapcode != 'O') {
|
---|
951 | if(data->set.use_ssl != CURLUSESSL_TRY) {
|
---|
952 | failf(data, "STARTTLS denied. %c", imapcode);
|
---|
953 | result = CURLE_USE_SSL_FAILED;
|
---|
954 | }
|
---|
955 | else
|
---|
956 | result = imap_perform_authentication(conn);
|
---|
957 | }
|
---|
958 | else
|
---|
959 | result = imap_perform_upgrade_tls(conn);
|
---|
960 |
|
---|
961 | return result;
|
---|
962 | }
|
---|
963 |
|
---|
964 | /* For SASL authentication responses */
|
---|
965 | static CURLcode imap_state_auth_resp(struct connectdata *conn,
|
---|
966 | int imapcode,
|
---|
967 | imapstate instate)
|
---|
968 | {
|
---|
969 | CURLcode result = CURLE_OK;
|
---|
970 | struct SessionHandle *data = conn->data;
|
---|
971 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
972 | saslprogress progress;
|
---|
973 |
|
---|
974 | (void)instate; /* no use for this yet */
|
---|
975 |
|
---|
976 | result = Curl_sasl_continue(&imapc->sasl, conn, imapcode, &progress);
|
---|
977 | if(!result)
|
---|
978 | switch(progress) {
|
---|
979 | case SASL_DONE:
|
---|
980 | state(conn, IMAP_STOP); /* Authenticated */
|
---|
981 | break;
|
---|
982 | case SASL_IDLE: /* No mechanism left after cancellation */
|
---|
983 | if((!imapc->login_disabled) && (imapc->preftype & IMAP_TYPE_CLEARTEXT))
|
---|
984 | /* Perform clear text authentication */
|
---|
985 | result = imap_perform_login(conn);
|
---|
986 | else {
|
---|
987 | failf(data, "Authentication cancelled");
|
---|
988 | result = CURLE_LOGIN_DENIED;
|
---|
989 | }
|
---|
990 | break;
|
---|
991 | default:
|
---|
992 | break;
|
---|
993 | }
|
---|
994 |
|
---|
995 | return result;
|
---|
996 | }
|
---|
997 |
|
---|
998 | /* For LOGIN responses */
|
---|
999 | static CURLcode imap_state_login_resp(struct connectdata *conn,
|
---|
1000 | int imapcode,
|
---|
1001 | imapstate instate)
|
---|
1002 | {
|
---|
1003 | CURLcode result = CURLE_OK;
|
---|
1004 | struct SessionHandle *data = conn->data;
|
---|
1005 |
|
---|
1006 | (void)instate; /* no use for this yet */
|
---|
1007 |
|
---|
1008 | if(imapcode != 'O') {
|
---|
1009 | failf(data, "Access denied. %c", imapcode);
|
---|
1010 | result = CURLE_LOGIN_DENIED;
|
---|
1011 | }
|
---|
1012 | else
|
---|
1013 | /* End of connect phase */
|
---|
1014 | state(conn, IMAP_STOP);
|
---|
1015 |
|
---|
1016 | return result;
|
---|
1017 | }
|
---|
1018 |
|
---|
1019 | /* For LIST responses */
|
---|
1020 | static CURLcode imap_state_list_resp(struct connectdata *conn, int imapcode,
|
---|
1021 | imapstate instate)
|
---|
1022 | {
|
---|
1023 | CURLcode result = CURLE_OK;
|
---|
1024 | char *line = conn->data->state.buffer;
|
---|
1025 | size_t len = strlen(line);
|
---|
1026 |
|
---|
1027 | (void)instate; /* No use for this yet */
|
---|
1028 |
|
---|
1029 | if(imapcode == '*') {
|
---|
1030 | /* Temporarily add the LF character back and send as body to the client */
|
---|
1031 | line[len] = '\n';
|
---|
1032 | result = Curl_client_write(conn, CLIENTWRITE_BODY, line, len + 1);
|
---|
1033 | line[len] = '\0';
|
---|
1034 | }
|
---|
1035 | else if(imapcode != 'O')
|
---|
1036 | result = CURLE_QUOTE_ERROR; /* TODO: Fix error code */
|
---|
1037 | else
|
---|
1038 | /* End of DO phase */
|
---|
1039 | state(conn, IMAP_STOP);
|
---|
1040 |
|
---|
1041 | return result;
|
---|
1042 | }
|
---|
1043 |
|
---|
1044 | /* For SELECT responses */
|
---|
1045 | static CURLcode imap_state_select_resp(struct connectdata *conn, int imapcode,
|
---|
1046 | imapstate instate)
|
---|
1047 | {
|
---|
1048 | CURLcode result = CURLE_OK;
|
---|
1049 | struct SessionHandle *data = conn->data;
|
---|
1050 | struct IMAP *imap = conn->data->req.protop;
|
---|
1051 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
1052 | const char *line = data->state.buffer;
|
---|
1053 | char tmp[20];
|
---|
1054 |
|
---|
1055 | (void)instate; /* no use for this yet */
|
---|
1056 |
|
---|
1057 | if(imapcode == '*') {
|
---|
1058 | /* See if this is an UIDVALIDITY response */
|
---|
1059 | if(sscanf(line + 2, "OK [UIDVALIDITY %19[0123456789]]", tmp) == 1) {
|
---|
1060 | Curl_safefree(imapc->mailbox_uidvalidity);
|
---|
1061 | imapc->mailbox_uidvalidity = strdup(tmp);
|
---|
1062 | }
|
---|
1063 | }
|
---|
1064 | else if(imapcode == 'O') {
|
---|
1065 | /* Check if the UIDVALIDITY has been specified and matches */
|
---|
1066 | if(imap->uidvalidity && imapc->mailbox_uidvalidity &&
|
---|
1067 | strcmp(imap->uidvalidity, imapc->mailbox_uidvalidity)) {
|
---|
1068 | failf(conn->data, "Mailbox UIDVALIDITY has changed");
|
---|
1069 | result = CURLE_REMOTE_FILE_NOT_FOUND;
|
---|
1070 | }
|
---|
1071 | else {
|
---|
1072 | /* Note the currently opened mailbox on this connection */
|
---|
1073 | imapc->mailbox = strdup(imap->mailbox);
|
---|
1074 |
|
---|
1075 | if(imap->custom)
|
---|
1076 | result = imap_perform_list(conn);
|
---|
1077 | else if(imap->query)
|
---|
1078 | result = imap_perform_search(conn);
|
---|
1079 | else
|
---|
1080 | result = imap_perform_fetch(conn);
|
---|
1081 | }
|
---|
1082 | }
|
---|
1083 | else {
|
---|
1084 | failf(data, "Select failed");
|
---|
1085 | result = CURLE_LOGIN_DENIED;
|
---|
1086 | }
|
---|
1087 |
|
---|
1088 | return result;
|
---|
1089 | }
|
---|
1090 |
|
---|
1091 | /* For the (first line of the) FETCH responses */
|
---|
1092 | static CURLcode imap_state_fetch_resp(struct connectdata *conn, int imapcode,
|
---|
1093 | imapstate instate)
|
---|
1094 | {
|
---|
1095 | CURLcode result = CURLE_OK;
|
---|
1096 | struct SessionHandle *data = conn->data;
|
---|
1097 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
1098 | struct pingpong *pp = &imapc->pp;
|
---|
1099 | const char *ptr = data->state.buffer;
|
---|
1100 | bool parsed = FALSE;
|
---|
1101 | curl_off_t size;
|
---|
1102 |
|
---|
1103 | (void)instate; /* no use for this yet */
|
---|
1104 |
|
---|
1105 | if(imapcode != '*') {
|
---|
1106 | Curl_pgrsSetDownloadSize(data, -1);
|
---|
1107 | state(conn, IMAP_STOP);
|
---|
1108 | return CURLE_REMOTE_FILE_NOT_FOUND; /* TODO: Fix error code */
|
---|
1109 | }
|
---|
1110 |
|
---|
1111 | /* Something like this is received "* 1 FETCH (BODY[TEXT] {2021}\r" so parse
|
---|
1112 | the continuation data contained within the curly brackets */
|
---|
1113 | while(*ptr && (*ptr != '{'))
|
---|
1114 | ptr++;
|
---|
1115 |
|
---|
1116 | if(*ptr == '{') {
|
---|
1117 | char *endptr;
|
---|
1118 | size = curlx_strtoofft(ptr + 1, &endptr, 10);
|
---|
1119 | if(endptr - ptr > 1 && endptr[0] == '}' &&
|
---|
1120 | endptr[1] == '\r' && endptr[2] == '\0')
|
---|
1121 | parsed = TRUE;
|
---|
1122 | }
|
---|
1123 |
|
---|
1124 | if(parsed) {
|
---|
1125 | infof(data, "Found %" CURL_FORMAT_CURL_OFF_TU " bytes to download\n",
|
---|
1126 | size);
|
---|
1127 | Curl_pgrsSetDownloadSize(data, size);
|
---|
1128 |
|
---|
1129 | if(pp->cache) {
|
---|
1130 | /* At this point there is a bunch of data in the header "cache" that is
|
---|
1131 | actually body content, send it as body and then skip it. Do note
|
---|
1132 | that there may even be additional "headers" after the body. */
|
---|
1133 | size_t chunk = pp->cache_size;
|
---|
1134 |
|
---|
1135 | if(chunk > (size_t)size)
|
---|
1136 | /* The conversion from curl_off_t to size_t is always fine here */
|
---|
1137 | chunk = (size_t)size;
|
---|
1138 |
|
---|
1139 | result = Curl_client_write(conn, CLIENTWRITE_BODY, pp->cache, chunk);
|
---|
1140 | if(result)
|
---|
1141 | return result;
|
---|
1142 |
|
---|
1143 | data->req.bytecount += chunk;
|
---|
1144 |
|
---|
1145 | infof(data, "Written %" CURL_FORMAT_CURL_OFF_TU
|
---|
1146 | " bytes, %" CURL_FORMAT_CURL_OFF_TU
|
---|
1147 | " bytes are left for transfer\n", (curl_off_t)chunk,
|
---|
1148 | size - chunk);
|
---|
1149 |
|
---|
1150 | /* Have we used the entire cache or just part of it?*/
|
---|
1151 | if(pp->cache_size > chunk) {
|
---|
1152 | /* Only part of it so shrink the cache to fit the trailing data */
|
---|
1153 | memmove(pp->cache, pp->cache + chunk, pp->cache_size - chunk);
|
---|
1154 | pp->cache_size -= chunk;
|
---|
1155 | }
|
---|
1156 | else {
|
---|
1157 | /* Free the cache */
|
---|
1158 | Curl_safefree(pp->cache);
|
---|
1159 |
|
---|
1160 | /* Reset the cache size */
|
---|
1161 | pp->cache_size = 0;
|
---|
1162 | }
|
---|
1163 | }
|
---|
1164 |
|
---|
1165 | if(data->req.bytecount == size)
|
---|
1166 | /* The entire data is already transferred! */
|
---|
1167 | Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
---|
1168 | else {
|
---|
1169 | /* IMAP download */
|
---|
1170 | data->req.maxdownload = size;
|
---|
1171 | Curl_setup_transfer(conn, FIRSTSOCKET, size, FALSE, NULL, -1, NULL);
|
---|
1172 | }
|
---|
1173 | }
|
---|
1174 | else {
|
---|
1175 | /* We don't know how to parse this line */
|
---|
1176 | failf(pp->conn->data, "Failed to parse FETCH response.");
|
---|
1177 | result = CURLE_FTP_WEIRD_SERVER_REPLY; /* TODO: fix this code */
|
---|
1178 | }
|
---|
1179 |
|
---|
1180 | /* End of DO phase */
|
---|
1181 | state(conn, IMAP_STOP);
|
---|
1182 |
|
---|
1183 | return result;
|
---|
1184 | }
|
---|
1185 |
|
---|
1186 | /* For final FETCH responses performed after the download */
|
---|
1187 | static CURLcode imap_state_fetch_final_resp(struct connectdata *conn,
|
---|
1188 | int imapcode,
|
---|
1189 | imapstate instate)
|
---|
1190 | {
|
---|
1191 | CURLcode result = CURLE_OK;
|
---|
1192 |
|
---|
1193 | (void)instate; /* No use for this yet */
|
---|
1194 |
|
---|
1195 | if(imapcode != 'O')
|
---|
1196 | result = CURLE_FTP_WEIRD_SERVER_REPLY; /* TODO: Fix error code */
|
---|
1197 | else
|
---|
1198 | /* End of DONE phase */
|
---|
1199 | state(conn, IMAP_STOP);
|
---|
1200 |
|
---|
1201 | return result;
|
---|
1202 | }
|
---|
1203 |
|
---|
1204 | /* For APPEND responses */
|
---|
1205 | static CURLcode imap_state_append_resp(struct connectdata *conn, int imapcode,
|
---|
1206 | imapstate instate)
|
---|
1207 | {
|
---|
1208 | CURLcode result = CURLE_OK;
|
---|
1209 | struct SessionHandle *data = conn->data;
|
---|
1210 |
|
---|
1211 | (void)instate; /* No use for this yet */
|
---|
1212 |
|
---|
1213 | if(imapcode != '+') {
|
---|
1214 | result = CURLE_UPLOAD_FAILED;
|
---|
1215 | }
|
---|
1216 | else {
|
---|
1217 | /* Set the progress upload size */
|
---|
1218 | Curl_pgrsSetUploadSize(data, data->state.infilesize);
|
---|
1219 |
|
---|
1220 | /* IMAP upload */
|
---|
1221 | Curl_setup_transfer(conn, -1, -1, FALSE, NULL, FIRSTSOCKET, NULL);
|
---|
1222 |
|
---|
1223 | /* End of DO phase */
|
---|
1224 | state(conn, IMAP_STOP);
|
---|
1225 | }
|
---|
1226 |
|
---|
1227 | return result;
|
---|
1228 | }
|
---|
1229 |
|
---|
1230 | /* For final APPEND responses performed after the upload */
|
---|
1231 | static CURLcode imap_state_append_final_resp(struct connectdata *conn,
|
---|
1232 | int imapcode,
|
---|
1233 | imapstate instate)
|
---|
1234 | {
|
---|
1235 | CURLcode result = CURLE_OK;
|
---|
1236 |
|
---|
1237 | (void)instate; /* No use for this yet */
|
---|
1238 |
|
---|
1239 | if(imapcode != 'O')
|
---|
1240 | result = CURLE_UPLOAD_FAILED;
|
---|
1241 | else
|
---|
1242 | /* End of DONE phase */
|
---|
1243 | state(conn, IMAP_STOP);
|
---|
1244 |
|
---|
1245 | return result;
|
---|
1246 | }
|
---|
1247 |
|
---|
1248 | /* For SEARCH responses */
|
---|
1249 | static CURLcode imap_state_search_resp(struct connectdata *conn, int imapcode,
|
---|
1250 | imapstate instate)
|
---|
1251 | {
|
---|
1252 | CURLcode result = CURLE_OK;
|
---|
1253 | char *line = conn->data->state.buffer;
|
---|
1254 | size_t len = strlen(line);
|
---|
1255 |
|
---|
1256 | (void)instate; /* No use for this yet */
|
---|
1257 |
|
---|
1258 | if(imapcode == '*') {
|
---|
1259 | /* Temporarily add the LF character back and send as body to the client */
|
---|
1260 | line[len] = '\n';
|
---|
1261 | result = Curl_client_write(conn, CLIENTWRITE_BODY, line, len + 1);
|
---|
1262 | line[len] = '\0';
|
---|
1263 | }
|
---|
1264 | else if(imapcode != 'O')
|
---|
1265 | result = CURLE_QUOTE_ERROR; /* TODO: Fix error code */
|
---|
1266 | else
|
---|
1267 | /* End of DO phase */
|
---|
1268 | state(conn, IMAP_STOP);
|
---|
1269 |
|
---|
1270 | return result;
|
---|
1271 | }
|
---|
1272 |
|
---|
1273 | static CURLcode imap_statemach_act(struct connectdata *conn)
|
---|
1274 | {
|
---|
1275 | CURLcode result = CURLE_OK;
|
---|
1276 | curl_socket_t sock = conn->sock[FIRSTSOCKET];
|
---|
1277 | int imapcode;
|
---|
1278 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
1279 | struct pingpong *pp = &imapc->pp;
|
---|
1280 | size_t nread = 0;
|
---|
1281 |
|
---|
1282 | /* Busy upgrading the connection; right now all I/O is SSL/TLS, not IMAP */
|
---|
1283 | if(imapc->state == IMAP_UPGRADETLS)
|
---|
1284 | return imap_perform_upgrade_tls(conn);
|
---|
1285 |
|
---|
1286 | /* Flush any data that needs to be sent */
|
---|
1287 | if(pp->sendleft)
|
---|
1288 | return Curl_pp_flushsend(pp);
|
---|
1289 |
|
---|
1290 | do {
|
---|
1291 | /* Read the response from the server */
|
---|
1292 | result = Curl_pp_readresp(sock, pp, &imapcode, &nread);
|
---|
1293 | if(result)
|
---|
1294 | return result;
|
---|
1295 |
|
---|
1296 | /* Was there an error parsing the response line? */
|
---|
1297 | if(imapcode == -1)
|
---|
1298 | return CURLE_FTP_WEIRD_SERVER_REPLY;
|
---|
1299 |
|
---|
1300 | if(!imapcode)
|
---|
1301 | break;
|
---|
1302 |
|
---|
1303 | /* We have now received a full IMAP server response */
|
---|
1304 | switch(imapc->state) {
|
---|
1305 | case IMAP_SERVERGREET:
|
---|
1306 | result = imap_state_servergreet_resp(conn, imapcode, imapc->state);
|
---|
1307 | break;
|
---|
1308 |
|
---|
1309 | case IMAP_CAPABILITY:
|
---|
1310 | result = imap_state_capability_resp(conn, imapcode, imapc->state);
|
---|
1311 | break;
|
---|
1312 |
|
---|
1313 | case IMAP_STARTTLS:
|
---|
1314 | result = imap_state_starttls_resp(conn, imapcode, imapc->state);
|
---|
1315 | break;
|
---|
1316 |
|
---|
1317 | case IMAP_AUTHENTICATE:
|
---|
1318 | result = imap_state_auth_resp(conn, imapcode, imapc->state);
|
---|
1319 | break;
|
---|
1320 |
|
---|
1321 | case IMAP_LOGIN:
|
---|
1322 | result = imap_state_login_resp(conn, imapcode, imapc->state);
|
---|
1323 | break;
|
---|
1324 |
|
---|
1325 | case IMAP_LIST:
|
---|
1326 | result = imap_state_list_resp(conn, imapcode, imapc->state);
|
---|
1327 | break;
|
---|
1328 |
|
---|
1329 | case IMAP_SELECT:
|
---|
1330 | result = imap_state_select_resp(conn, imapcode, imapc->state);
|
---|
1331 | break;
|
---|
1332 |
|
---|
1333 | case IMAP_FETCH:
|
---|
1334 | result = imap_state_fetch_resp(conn, imapcode, imapc->state);
|
---|
1335 | break;
|
---|
1336 |
|
---|
1337 | case IMAP_FETCH_FINAL:
|
---|
1338 | result = imap_state_fetch_final_resp(conn, imapcode, imapc->state);
|
---|
1339 | break;
|
---|
1340 |
|
---|
1341 | case IMAP_APPEND:
|
---|
1342 | result = imap_state_append_resp(conn, imapcode, imapc->state);
|
---|
1343 | break;
|
---|
1344 |
|
---|
1345 | case IMAP_APPEND_FINAL:
|
---|
1346 | result = imap_state_append_final_resp(conn, imapcode, imapc->state);
|
---|
1347 | break;
|
---|
1348 |
|
---|
1349 | case IMAP_SEARCH:
|
---|
1350 | result = imap_state_search_resp(conn, imapcode, imapc->state);
|
---|
1351 | break;
|
---|
1352 |
|
---|
1353 | case IMAP_LOGOUT:
|
---|
1354 | /* fallthrough, just stop! */
|
---|
1355 | default:
|
---|
1356 | /* internal error */
|
---|
1357 | state(conn, IMAP_STOP);
|
---|
1358 | break;
|
---|
1359 | }
|
---|
1360 | } while(!result && imapc->state != IMAP_STOP && Curl_pp_moredata(pp));
|
---|
1361 |
|
---|
1362 | return result;
|
---|
1363 | }
|
---|
1364 |
|
---|
1365 | /* Called repeatedly until done from multi.c */
|
---|
1366 | static CURLcode imap_multi_statemach(struct connectdata *conn, bool *done)
|
---|
1367 | {
|
---|
1368 | CURLcode result = CURLE_OK;
|
---|
1369 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
1370 |
|
---|
1371 | if((conn->handler->flags & PROTOPT_SSL) && !imapc->ssldone) {
|
---|
1372 | result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &imapc->ssldone);
|
---|
1373 | if(result || !imapc->ssldone)
|
---|
1374 | return result;
|
---|
1375 | }
|
---|
1376 |
|
---|
1377 | result = Curl_pp_statemach(&imapc->pp, FALSE);
|
---|
1378 | *done = (imapc->state == IMAP_STOP) ? TRUE : FALSE;
|
---|
1379 |
|
---|
1380 | return result;
|
---|
1381 | }
|
---|
1382 |
|
---|
1383 | static CURLcode imap_block_statemach(struct connectdata *conn)
|
---|
1384 | {
|
---|
1385 | CURLcode result = CURLE_OK;
|
---|
1386 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
1387 |
|
---|
1388 | while(imapc->state != IMAP_STOP && !result)
|
---|
1389 | result = Curl_pp_statemach(&imapc->pp, TRUE);
|
---|
1390 |
|
---|
1391 | return result;
|
---|
1392 | }
|
---|
1393 |
|
---|
1394 | /* Allocate and initialize the struct IMAP for the current SessionHandle if
|
---|
1395 | required */
|
---|
1396 | static CURLcode imap_init(struct connectdata *conn)
|
---|
1397 | {
|
---|
1398 | CURLcode result = CURLE_OK;
|
---|
1399 | struct SessionHandle *data = conn->data;
|
---|
1400 | struct IMAP *imap;
|
---|
1401 |
|
---|
1402 | imap = data->req.protop = calloc(sizeof(struct IMAP), 1);
|
---|
1403 | if(!imap)
|
---|
1404 | result = CURLE_OUT_OF_MEMORY;
|
---|
1405 |
|
---|
1406 | return result;
|
---|
1407 | }
|
---|
1408 |
|
---|
1409 | /* For the IMAP "protocol connect" and "doing" phases only */
|
---|
1410 | static int imap_getsock(struct connectdata *conn, curl_socket_t *socks,
|
---|
1411 | int numsocks)
|
---|
1412 | {
|
---|
1413 | return Curl_pp_getsock(&conn->proto.imapc.pp, socks, numsocks);
|
---|
1414 | }
|
---|
1415 |
|
---|
1416 | /***********************************************************************
|
---|
1417 | *
|
---|
1418 | * imap_connect()
|
---|
1419 | *
|
---|
1420 | * This function should do everything that is to be considered a part of the
|
---|
1421 | * connection phase.
|
---|
1422 | *
|
---|
1423 | * The variable 'done' points to will be TRUE if the protocol-layer connect
|
---|
1424 | * phase is done when this function returns, or FALSE if not.
|
---|
1425 | */
|
---|
1426 | static CURLcode imap_connect(struct connectdata *conn, bool *done)
|
---|
1427 | {
|
---|
1428 | CURLcode result = CURLE_OK;
|
---|
1429 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
1430 | struct pingpong *pp = &imapc->pp;
|
---|
1431 |
|
---|
1432 | *done = FALSE; /* default to not done yet */
|
---|
1433 |
|
---|
1434 | /* We always support persistent connections in IMAP */
|
---|
1435 | connkeep(conn, "IMAP default");
|
---|
1436 |
|
---|
1437 | /* Set the default response time-out */
|
---|
1438 | pp->response_time = RESP_TIMEOUT;
|
---|
1439 | pp->statemach_act = imap_statemach_act;
|
---|
1440 | pp->endofresp = imap_endofresp;
|
---|
1441 | pp->conn = conn;
|
---|
1442 |
|
---|
1443 | /* Set the default preferred authentication type and mechanism */
|
---|
1444 | imapc->preftype = IMAP_TYPE_ANY;
|
---|
1445 | Curl_sasl_init(&imapc->sasl, &saslimap);
|
---|
1446 |
|
---|
1447 | /* Initialise the pingpong layer */
|
---|
1448 | Curl_pp_init(pp);
|
---|
1449 |
|
---|
1450 | /* Parse the URL options */
|
---|
1451 | result = imap_parse_url_options(conn);
|
---|
1452 | if(result)
|
---|
1453 | return result;
|
---|
1454 |
|
---|
1455 | /* Start off waiting for the server greeting response */
|
---|
1456 | state(conn, IMAP_SERVERGREET);
|
---|
1457 |
|
---|
1458 | /* Start off with an response id of '*' */
|
---|
1459 | strcpy(imapc->resptag, "*");
|
---|
1460 |
|
---|
1461 | result = imap_multi_statemach(conn, done);
|
---|
1462 |
|
---|
1463 | return result;
|
---|
1464 | }
|
---|
1465 |
|
---|
1466 | /***********************************************************************
|
---|
1467 | *
|
---|
1468 | * imap_done()
|
---|
1469 | *
|
---|
1470 | * The DONE function. This does what needs to be done after a single DO has
|
---|
1471 | * performed.
|
---|
1472 | *
|
---|
1473 | * Input argument is already checked for validity.
|
---|
1474 | */
|
---|
1475 | static CURLcode imap_done(struct connectdata *conn, CURLcode status,
|
---|
1476 | bool premature)
|
---|
1477 | {
|
---|
1478 | CURLcode result = CURLE_OK;
|
---|
1479 | struct SessionHandle *data = conn->data;
|
---|
1480 | struct IMAP *imap = data->req.protop;
|
---|
1481 |
|
---|
1482 | (void)premature;
|
---|
1483 |
|
---|
1484 | if(!imap)
|
---|
1485 | /* When the easy handle is removed from the multi interface while libcurl
|
---|
1486 | is still trying to resolve the host name, the IMAP struct is not yet
|
---|
1487 | initialized. However, the removal action calls Curl_done() which in
|
---|
1488 | turn calls this function, so we simply return success. */
|
---|
1489 | return CURLE_OK;
|
---|
1490 |
|
---|
1491 | if(status) {
|
---|
1492 | connclose(conn, "IMAP done with bad status"); /* marked for closure */
|
---|
1493 | result = status; /* use the already set error code */
|
---|
1494 | }
|
---|
1495 | else if(!data->set.connect_only && !imap->custom &&
|
---|
1496 | (imap->uid || data->set.upload)) {
|
---|
1497 | /* Handle responses after FETCH or APPEND transfer has finished */
|
---|
1498 | if(!data->set.upload)
|
---|
1499 | state(conn, IMAP_FETCH_FINAL);
|
---|
1500 | else {
|
---|
1501 | /* End the APPEND command first by sending an empty line */
|
---|
1502 | result = Curl_pp_sendf(&conn->proto.imapc.pp, "%s", "");
|
---|
1503 | if(!result)
|
---|
1504 | state(conn, IMAP_APPEND_FINAL);
|
---|
1505 | }
|
---|
1506 |
|
---|
1507 | /* Run the state-machine
|
---|
1508 |
|
---|
1509 | TODO: when the multi interface is used, this _really_ should be using
|
---|
1510 | the imap_multi_statemach function but we have no general support for
|
---|
1511 | non-blocking DONE operations, not in the multi state machine and with
|
---|
1512 | Curl_done() invokes on several places in the code!
|
---|
1513 | */
|
---|
1514 | if(!result)
|
---|
1515 | result = imap_block_statemach(conn);
|
---|
1516 | }
|
---|
1517 |
|
---|
1518 | /* Cleanup our per-request based variables */
|
---|
1519 | Curl_safefree(imap->mailbox);
|
---|
1520 | Curl_safefree(imap->uidvalidity);
|
---|
1521 | Curl_safefree(imap->uid);
|
---|
1522 | Curl_safefree(imap->section);
|
---|
1523 | Curl_safefree(imap->partial);
|
---|
1524 | Curl_safefree(imap->query);
|
---|
1525 | Curl_safefree(imap->custom);
|
---|
1526 | Curl_safefree(imap->custom_params);
|
---|
1527 |
|
---|
1528 | /* Clear the transfer mode for the next request */
|
---|
1529 | imap->transfer = FTPTRANSFER_BODY;
|
---|
1530 |
|
---|
1531 | return result;
|
---|
1532 | }
|
---|
1533 |
|
---|
1534 | /***********************************************************************
|
---|
1535 | *
|
---|
1536 | * imap_perform()
|
---|
1537 | *
|
---|
1538 | * This is the actual DO function for IMAP. Fetch or append a message, or do
|
---|
1539 | * other things according to the options previously setup.
|
---|
1540 | */
|
---|
1541 | static CURLcode imap_perform(struct connectdata *conn, bool *connected,
|
---|
1542 | bool *dophase_done)
|
---|
1543 | {
|
---|
1544 | /* This is IMAP and no proxy */
|
---|
1545 | CURLcode result = CURLE_OK;
|
---|
1546 | struct SessionHandle *data = conn->data;
|
---|
1547 | struct IMAP *imap = data->req.protop;
|
---|
1548 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
1549 | bool selected = FALSE;
|
---|
1550 |
|
---|
1551 | DEBUGF(infof(conn->data, "DO phase starts\n"));
|
---|
1552 |
|
---|
1553 | if(conn->data->set.opt_no_body) {
|
---|
1554 | /* Requested no body means no transfer */
|
---|
1555 | imap->transfer = FTPTRANSFER_INFO;
|
---|
1556 | }
|
---|
1557 |
|
---|
1558 | *dophase_done = FALSE; /* not done yet */
|
---|
1559 |
|
---|
1560 | /* Determine if the requested mailbox (with the same UIDVALIDITY if set)
|
---|
1561 | has already been selected on this connection */
|
---|
1562 | if(imap->mailbox && imapc->mailbox &&
|
---|
1563 | !strcmp(imap->mailbox, imapc->mailbox) &&
|
---|
1564 | (!imap->uidvalidity || !imapc->mailbox_uidvalidity ||
|
---|
1565 | !strcmp(imap->uidvalidity, imapc->mailbox_uidvalidity)))
|
---|
1566 | selected = TRUE;
|
---|
1567 |
|
---|
1568 | /* Start the first command in the DO phase */
|
---|
1569 | if(conn->data->set.upload)
|
---|
1570 | /* APPEND can be executed directly */
|
---|
1571 | result = imap_perform_append(conn);
|
---|
1572 | else if(imap->custom && (selected || !imap->mailbox))
|
---|
1573 | /* Custom command using the same mailbox or no mailbox */
|
---|
1574 | result = imap_perform_list(conn);
|
---|
1575 | else if(!imap->custom && selected && imap->uid)
|
---|
1576 | /* FETCH from the same mailbox */
|
---|
1577 | result = imap_perform_fetch(conn);
|
---|
1578 | else if(!imap->custom && selected && imap->query)
|
---|
1579 | /* SEARCH the current mailbox */
|
---|
1580 | result = imap_perform_search(conn);
|
---|
1581 | else if(imap->mailbox && !selected &&
|
---|
1582 | (imap->custom || imap->uid || imap->query))
|
---|
1583 | /* SELECT the mailbox */
|
---|
1584 | result = imap_perform_select(conn);
|
---|
1585 | else
|
---|
1586 | /* LIST */
|
---|
1587 | result = imap_perform_list(conn);
|
---|
1588 |
|
---|
1589 | if(result)
|
---|
1590 | return result;
|
---|
1591 |
|
---|
1592 | /* Run the state-machine */
|
---|
1593 | result = imap_multi_statemach(conn, dophase_done);
|
---|
1594 |
|
---|
1595 | *connected = conn->bits.tcpconnect[FIRSTSOCKET];
|
---|
1596 |
|
---|
1597 | if(*dophase_done)
|
---|
1598 | DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
---|
1599 |
|
---|
1600 | return result;
|
---|
1601 | }
|
---|
1602 |
|
---|
1603 | /***********************************************************************
|
---|
1604 | *
|
---|
1605 | * imap_do()
|
---|
1606 | *
|
---|
1607 | * This function is registered as 'curl_do' function. It decodes the path
|
---|
1608 | * parts etc as a wrapper to the actual DO function (imap_perform).
|
---|
1609 | *
|
---|
1610 | * The input argument is already checked for validity.
|
---|
1611 | */
|
---|
1612 | static CURLcode imap_do(struct connectdata *conn, bool *done)
|
---|
1613 | {
|
---|
1614 | CURLcode result = CURLE_OK;
|
---|
1615 |
|
---|
1616 | *done = FALSE; /* default to false */
|
---|
1617 |
|
---|
1618 | /* Parse the URL path */
|
---|
1619 | result = imap_parse_url_path(conn);
|
---|
1620 | if(result)
|
---|
1621 | return result;
|
---|
1622 |
|
---|
1623 | /* Parse the custom request */
|
---|
1624 | result = imap_parse_custom_request(conn);
|
---|
1625 | if(result)
|
---|
1626 | return result;
|
---|
1627 |
|
---|
1628 | result = imap_regular_transfer(conn, done);
|
---|
1629 |
|
---|
1630 | return result;
|
---|
1631 | }
|
---|
1632 |
|
---|
1633 | /***********************************************************************
|
---|
1634 | *
|
---|
1635 | * imap_disconnect()
|
---|
1636 | *
|
---|
1637 | * Disconnect from an IMAP server. Cleanup protocol-specific per-connection
|
---|
1638 | * resources. BLOCKING.
|
---|
1639 | */
|
---|
1640 | static CURLcode imap_disconnect(struct connectdata *conn, bool dead_connection)
|
---|
1641 | {
|
---|
1642 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
1643 |
|
---|
1644 | /* We cannot send quit unconditionally. If this connection is stale or
|
---|
1645 | bad in any way, sending quit and waiting around here will make the
|
---|
1646 | disconnect wait in vain and cause more problems than we need to. */
|
---|
1647 |
|
---|
1648 | /* The IMAP session may or may not have been allocated/setup at this
|
---|
1649 | point! */
|
---|
1650 | if(!dead_connection && imapc->pp.conn && imapc->pp.conn->bits.protoconnstart)
|
---|
1651 | if(!imap_perform_logout(conn))
|
---|
1652 | (void)imap_block_statemach(conn); /* ignore errors on LOGOUT */
|
---|
1653 |
|
---|
1654 | /* Disconnect from the server */
|
---|
1655 | Curl_pp_disconnect(&imapc->pp);
|
---|
1656 |
|
---|
1657 | /* Cleanup the SASL module */
|
---|
1658 | Curl_sasl_cleanup(conn, imapc->sasl.authused);
|
---|
1659 |
|
---|
1660 | /* Cleanup our connection based variables */
|
---|
1661 | Curl_safefree(imapc->mailbox);
|
---|
1662 | Curl_safefree(imapc->mailbox_uidvalidity);
|
---|
1663 |
|
---|
1664 | return CURLE_OK;
|
---|
1665 | }
|
---|
1666 |
|
---|
1667 | /* Call this when the DO phase has completed */
|
---|
1668 | static CURLcode imap_dophase_done(struct connectdata *conn, bool connected)
|
---|
1669 | {
|
---|
1670 | struct IMAP *imap = conn->data->req.protop;
|
---|
1671 |
|
---|
1672 | (void)connected;
|
---|
1673 |
|
---|
1674 | if(imap->transfer != FTPTRANSFER_BODY)
|
---|
1675 | /* no data to transfer */
|
---|
1676 | Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
---|
1677 |
|
---|
1678 | return CURLE_OK;
|
---|
1679 | }
|
---|
1680 |
|
---|
1681 | /* Called from multi.c while DOing */
|
---|
1682 | static CURLcode imap_doing(struct connectdata *conn, bool *dophase_done)
|
---|
1683 | {
|
---|
1684 | CURLcode result = imap_multi_statemach(conn, dophase_done);
|
---|
1685 |
|
---|
1686 | if(result)
|
---|
1687 | DEBUGF(infof(conn->data, "DO phase failed\n"));
|
---|
1688 | else if(*dophase_done) {
|
---|
1689 | result = imap_dophase_done(conn, FALSE /* not connected */);
|
---|
1690 |
|
---|
1691 | DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
---|
1692 | }
|
---|
1693 |
|
---|
1694 | return result;
|
---|
1695 | }
|
---|
1696 |
|
---|
1697 | /***********************************************************************
|
---|
1698 | *
|
---|
1699 | * imap_regular_transfer()
|
---|
1700 | *
|
---|
1701 | * The input argument is already checked for validity.
|
---|
1702 | *
|
---|
1703 | * Performs all commands done before a regular transfer between a local and a
|
---|
1704 | * remote host.
|
---|
1705 | */
|
---|
1706 | static CURLcode imap_regular_transfer(struct connectdata *conn,
|
---|
1707 | bool *dophase_done)
|
---|
1708 | {
|
---|
1709 | CURLcode result = CURLE_OK;
|
---|
1710 | bool connected = FALSE;
|
---|
1711 | struct SessionHandle *data = conn->data;
|
---|
1712 |
|
---|
1713 | /* Make sure size is unknown at this point */
|
---|
1714 | data->req.size = -1;
|
---|
1715 |
|
---|
1716 | /* Set the progress data */
|
---|
1717 | Curl_pgrsSetUploadCounter(data, 0);
|
---|
1718 | Curl_pgrsSetDownloadCounter(data, 0);
|
---|
1719 | Curl_pgrsSetUploadSize(data, -1);
|
---|
1720 | Curl_pgrsSetDownloadSize(data, -1);
|
---|
1721 |
|
---|
1722 | /* Carry out the perform */
|
---|
1723 | result = imap_perform(conn, &connected, dophase_done);
|
---|
1724 |
|
---|
1725 | /* Perform post DO phase operations if necessary */
|
---|
1726 | if(!result && *dophase_done)
|
---|
1727 | result = imap_dophase_done(conn, connected);
|
---|
1728 |
|
---|
1729 | return result;
|
---|
1730 | }
|
---|
1731 |
|
---|
1732 | static CURLcode imap_setup_connection(struct connectdata *conn)
|
---|
1733 | {
|
---|
1734 | struct SessionHandle *data = conn->data;
|
---|
1735 |
|
---|
1736 | /* Initialise the IMAP layer */
|
---|
1737 | CURLcode result = imap_init(conn);
|
---|
1738 | if(result)
|
---|
1739 | return result;
|
---|
1740 |
|
---|
1741 | if(conn->bits.httpproxy && !data->set.tunnel_thru_httpproxy) {
|
---|
1742 | /* Unless we have asked to tunnel IMAP operations through the proxy, we
|
---|
1743 | switch and use HTTP operations only */
|
---|
1744 | #ifndef CURL_DISABLE_HTTP
|
---|
1745 | if(conn->handler == &Curl_handler_imap)
|
---|
1746 | conn->handler = &Curl_handler_imap_proxy;
|
---|
1747 | else {
|
---|
1748 | #ifdef USE_SSL
|
---|
1749 | conn->handler = &Curl_handler_imaps_proxy;
|
---|
1750 | #else
|
---|
1751 | failf(data, "IMAPS not supported!");
|
---|
1752 | return CURLE_UNSUPPORTED_PROTOCOL;
|
---|
1753 | #endif
|
---|
1754 | }
|
---|
1755 |
|
---|
1756 | /* set it up as an HTTP connection instead */
|
---|
1757 | return conn->handler->setup_connection(conn);
|
---|
1758 | #else
|
---|
1759 | failf(data, "IMAP over http proxy requires HTTP support built-in!");
|
---|
1760 | return CURLE_UNSUPPORTED_PROTOCOL;
|
---|
1761 | #endif
|
---|
1762 | }
|
---|
1763 |
|
---|
1764 | data->state.path++; /* don't include the initial slash */
|
---|
1765 |
|
---|
1766 | return CURLE_OK;
|
---|
1767 | }
|
---|
1768 |
|
---|
1769 | /***********************************************************************
|
---|
1770 | *
|
---|
1771 | * imap_sendf()
|
---|
1772 | *
|
---|
1773 | * Sends the formated string as an IMAP command to the server.
|
---|
1774 | *
|
---|
1775 | * Designed to never block.
|
---|
1776 | */
|
---|
1777 | static CURLcode imap_sendf(struct connectdata *conn, const char *fmt, ...)
|
---|
1778 | {
|
---|
1779 | CURLcode result = CURLE_OK;
|
---|
1780 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
1781 | char *taggedfmt;
|
---|
1782 | va_list ap;
|
---|
1783 |
|
---|
1784 | DEBUGASSERT(fmt);
|
---|
1785 |
|
---|
1786 | /* Calculate the next command ID wrapping at 3 digits */
|
---|
1787 | imapc->cmdid = (imapc->cmdid + 1) % 1000;
|
---|
1788 |
|
---|
1789 | /* Calculate the tag based on the connection ID and command ID */
|
---|
1790 | snprintf(imapc->resptag, sizeof(imapc->resptag), "%c%03d",
|
---|
1791 | 'A' + curlx_sltosi(conn->connection_id % 26), imapc->cmdid);
|
---|
1792 |
|
---|
1793 | /* Prefix the format with the tag */
|
---|
1794 | taggedfmt = aprintf("%s %s", imapc->resptag, fmt);
|
---|
1795 | if(!taggedfmt)
|
---|
1796 | return CURLE_OUT_OF_MEMORY;
|
---|
1797 |
|
---|
1798 | /* Send the data with the tag */
|
---|
1799 | va_start(ap, fmt);
|
---|
1800 | result = Curl_pp_vsendf(&imapc->pp, taggedfmt, ap);
|
---|
1801 | va_end(ap);
|
---|
1802 |
|
---|
1803 | free(taggedfmt);
|
---|
1804 |
|
---|
1805 | return result;
|
---|
1806 | }
|
---|
1807 |
|
---|
1808 | /***********************************************************************
|
---|
1809 | *
|
---|
1810 | * imap_atom()
|
---|
1811 | *
|
---|
1812 | * Checks the input string for characters that need escaping and returns an
|
---|
1813 | * atom ready for sending to the server.
|
---|
1814 | *
|
---|
1815 | * The returned string needs to be freed.
|
---|
1816 | *
|
---|
1817 | */
|
---|
1818 | static char *imap_atom(const char *str, bool escape_only)
|
---|
1819 | {
|
---|
1820 | const char atom_specials[] = "(){ %*]";
|
---|
1821 | const char *p1;
|
---|
1822 | char *p2;
|
---|
1823 | size_t backsp_count = 0;
|
---|
1824 | size_t quote_count = 0;
|
---|
1825 | bool others_exists = FALSE;
|
---|
1826 | size_t newlen = 0;
|
---|
1827 | char *newstr = NULL;
|
---|
1828 |
|
---|
1829 | if(!str)
|
---|
1830 | return NULL;
|
---|
1831 |
|
---|
1832 | /* Look for "atom-specials", counting the backslash and quote characters as
|
---|
1833 | these will need escapping */
|
---|
1834 | p1 = str;
|
---|
1835 | while(*p1) {
|
---|
1836 | if(*p1 == '\\')
|
---|
1837 | backsp_count++;
|
---|
1838 | else if(*p1 == '"')
|
---|
1839 | quote_count++;
|
---|
1840 | else if(!escape_only) {
|
---|
1841 | const char *p3 = atom_specials;
|
---|
1842 |
|
---|
1843 | while(*p3 && !others_exists) {
|
---|
1844 | if(*p1 == *p3)
|
---|
1845 | others_exists = TRUE;
|
---|
1846 |
|
---|
1847 | p3++;
|
---|
1848 | }
|
---|
1849 | }
|
---|
1850 |
|
---|
1851 | p1++;
|
---|
1852 | }
|
---|
1853 |
|
---|
1854 | /* Does the input contain any "atom-special" characters? */
|
---|
1855 | if(!backsp_count && !quote_count && !others_exists)
|
---|
1856 | return strdup(str);
|
---|
1857 |
|
---|
1858 | /* Calculate the new string length */
|
---|
1859 | newlen = strlen(str) + backsp_count + quote_count + (others_exists ? 2 : 0);
|
---|
1860 |
|
---|
1861 | /* Allocate the new string */
|
---|
1862 | newstr = (char *) malloc((newlen + 1) * sizeof(char));
|
---|
1863 | if(!newstr)
|
---|
1864 | return NULL;
|
---|
1865 |
|
---|
1866 | /* Surround the string in quotes if necessary */
|
---|
1867 | p2 = newstr;
|
---|
1868 | if(others_exists) {
|
---|
1869 | newstr[0] = '"';
|
---|
1870 | newstr[newlen - 1] = '"';
|
---|
1871 | p2++;
|
---|
1872 | }
|
---|
1873 |
|
---|
1874 | /* Copy the string, escaping backslash and quote characters along the way */
|
---|
1875 | p1 = str;
|
---|
1876 | while(*p1) {
|
---|
1877 | if(*p1 == '\\' || *p1 == '"') {
|
---|
1878 | *p2 = '\\';
|
---|
1879 | p2++;
|
---|
1880 | }
|
---|
1881 |
|
---|
1882 | *p2 = *p1;
|
---|
1883 |
|
---|
1884 | p1++;
|
---|
1885 | p2++;
|
---|
1886 | }
|
---|
1887 |
|
---|
1888 | /* Terminate the string */
|
---|
1889 | newstr[newlen] = '\0';
|
---|
1890 |
|
---|
1891 | return newstr;
|
---|
1892 | }
|
---|
1893 |
|
---|
1894 | /***********************************************************************
|
---|
1895 | *
|
---|
1896 | * imap_is_bchar()
|
---|
1897 | *
|
---|
1898 | * Portable test of whether the specified char is a "bchar" as defined in the
|
---|
1899 | * grammar of RFC-5092.
|
---|
1900 | */
|
---|
1901 | static bool imap_is_bchar(char ch)
|
---|
1902 | {
|
---|
1903 | switch(ch) {
|
---|
1904 | /* bchar */
|
---|
1905 | case ':': case '@': case '/':
|
---|
1906 | /* bchar -> achar */
|
---|
1907 | case '&': case '=':
|
---|
1908 | /* bchar -> achar -> uchar -> unreserved */
|
---|
1909 | case '0': case '1': case '2': case '3': case '4': case '5': case '6':
|
---|
1910 | case '7': case '8': case '9':
|
---|
1911 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': case 'G':
|
---|
1912 | case 'H': case 'I': case 'J': case 'K': case 'L': case 'M': case 'N':
|
---|
1913 | case 'O': case 'P': case 'Q': case 'R': case 'S': case 'T': case 'U':
|
---|
1914 | case 'V': case 'W': case 'X': case 'Y': case 'Z':
|
---|
1915 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': case 'g':
|
---|
1916 | case 'h': case 'i': case 'j': case 'k': case 'l': case 'm': case 'n':
|
---|
1917 | case 'o': case 'p': case 'q': case 'r': case 's': case 't': case 'u':
|
---|
1918 | case 'v': case 'w': case 'x': case 'y': case 'z':
|
---|
1919 | case '-': case '.': case '_': case '~':
|
---|
1920 | /* bchar -> achar -> uchar -> sub-delims-sh */
|
---|
1921 | case '!': case '$': case '\'': case '(': case ')': case '*':
|
---|
1922 | case '+': case ',':
|
---|
1923 | /* bchar -> achar -> uchar -> pct-encoded */
|
---|
1924 | case '%': /* HEXDIG chars are already included above */
|
---|
1925 | return true;
|
---|
1926 |
|
---|
1927 | default:
|
---|
1928 | return false;
|
---|
1929 | }
|
---|
1930 | }
|
---|
1931 |
|
---|
1932 | /***********************************************************************
|
---|
1933 | *
|
---|
1934 | * imap_parse_url_options()
|
---|
1935 | *
|
---|
1936 | * Parse the URL login options.
|
---|
1937 | */
|
---|
1938 | static CURLcode imap_parse_url_options(struct connectdata *conn)
|
---|
1939 | {
|
---|
1940 | CURLcode result = CURLE_OK;
|
---|
1941 | struct imap_conn *imapc = &conn->proto.imapc;
|
---|
1942 | const char *ptr = conn->options;
|
---|
1943 |
|
---|
1944 | imapc->sasl.resetprefs = TRUE;
|
---|
1945 |
|
---|
1946 | while(!result && ptr && *ptr) {
|
---|
1947 | const char *key = ptr;
|
---|
1948 | const char *value;
|
---|
1949 |
|
---|
1950 | while(*ptr && *ptr != '=')
|
---|
1951 | ptr++;
|
---|
1952 |
|
---|
1953 | value = ptr + 1;
|
---|
1954 |
|
---|
1955 | while(*ptr && *ptr != ';')
|
---|
1956 | ptr++;
|
---|
1957 |
|
---|
1958 | if(strnequal(key, "AUTH=", 5))
|
---|
1959 | result = Curl_sasl_parse_url_auth_option(&imapc->sasl,
|
---|
1960 | value, ptr - value);
|
---|
1961 | else
|
---|
1962 | result = CURLE_URL_MALFORMAT;
|
---|
1963 |
|
---|
1964 | if(*ptr == ';')
|
---|
1965 | ptr++;
|
---|
1966 | }
|
---|
1967 |
|
---|
1968 | switch(imapc->sasl.prefmech) {
|
---|
1969 | case SASL_AUTH_NONE:
|
---|
1970 | imapc->preftype = IMAP_TYPE_NONE;
|
---|
1971 | break;
|
---|
1972 | case SASL_AUTH_DEFAULT:
|
---|
1973 | imapc->preftype = IMAP_TYPE_ANY;
|
---|
1974 | break;
|
---|
1975 | default:
|
---|
1976 | imapc->preftype = IMAP_TYPE_SASL;
|
---|
1977 | break;
|
---|
1978 | }
|
---|
1979 |
|
---|
1980 | return result;
|
---|
1981 | }
|
---|
1982 |
|
---|
1983 | /***********************************************************************
|
---|
1984 | *
|
---|
1985 | * imap_parse_url_path()
|
---|
1986 | *
|
---|
1987 | * Parse the URL path into separate path components.
|
---|
1988 | *
|
---|
1989 | */
|
---|
1990 | static CURLcode imap_parse_url_path(struct connectdata *conn)
|
---|
1991 | {
|
---|
1992 | /* The imap struct is already initialised in imap_connect() */
|
---|
1993 | CURLcode result = CURLE_OK;
|
---|
1994 | struct SessionHandle *data = conn->data;
|
---|
1995 | struct IMAP *imap = data->req.protop;
|
---|
1996 | const char *begin = data->state.path;
|
---|
1997 | const char *ptr = begin;
|
---|
1998 |
|
---|
1999 | /* See how much of the URL is a valid path and decode it */
|
---|
2000 | while(imap_is_bchar(*ptr))
|
---|
2001 | ptr++;
|
---|
2002 |
|
---|
2003 | if(ptr != begin) {
|
---|
2004 | /* Remove the trailing slash if present */
|
---|
2005 | const char *end = ptr;
|
---|
2006 | if(end > begin && end[-1] == '/')
|
---|
2007 | end--;
|
---|
2008 |
|
---|
2009 | result = Curl_urldecode(data, begin, end - begin, &imap->mailbox, NULL,
|
---|
2010 | TRUE);
|
---|
2011 | if(result)
|
---|
2012 | return result;
|
---|
2013 | }
|
---|
2014 | else
|
---|
2015 | imap->mailbox = NULL;
|
---|
2016 |
|
---|
2017 | /* There can be any number of parameters in the form ";NAME=VALUE" */
|
---|
2018 | while(*ptr == ';') {
|
---|
2019 | char *name;
|
---|
2020 | char *value;
|
---|
2021 | size_t valuelen;
|
---|
2022 |
|
---|
2023 | /* Find the length of the name parameter */
|
---|
2024 | begin = ++ptr;
|
---|
2025 | while(*ptr && *ptr != '=')
|
---|
2026 | ptr++;
|
---|
2027 |
|
---|
2028 | if(!*ptr)
|
---|
2029 | return CURLE_URL_MALFORMAT;
|
---|
2030 |
|
---|
2031 | /* Decode the name parameter */
|
---|
2032 | result = Curl_urldecode(data, begin, ptr - begin, &name, NULL, TRUE);
|
---|
2033 | if(result)
|
---|
2034 | return result;
|
---|
2035 |
|
---|
2036 | /* Find the length of the value parameter */
|
---|
2037 | begin = ++ptr;
|
---|
2038 | while(imap_is_bchar(*ptr))
|
---|
2039 | ptr++;
|
---|
2040 |
|
---|
2041 | /* Decode the value parameter */
|
---|
2042 | result = Curl_urldecode(data, begin, ptr - begin, &value, &valuelen, TRUE);
|
---|
2043 | if(result) {
|
---|
2044 | free(name);
|
---|
2045 | return result;
|
---|
2046 | }
|
---|
2047 |
|
---|
2048 | DEBUGF(infof(conn->data, "IMAP URL parameter '%s' = '%s'\n", name, value));
|
---|
2049 |
|
---|
2050 | /* Process the known hierarchical parameters (UIDVALIDITY, UID, SECTION and
|
---|
2051 | PARTIAL) stripping of the trailing slash character if it is present.
|
---|
2052 |
|
---|
2053 | Note: Unknown parameters trigger a URL_MALFORMAT error. */
|
---|
2054 | if(Curl_raw_equal(name, "UIDVALIDITY") && !imap->uidvalidity) {
|
---|
2055 | if(valuelen > 0 && value[valuelen - 1] == '/')
|
---|
2056 | value[valuelen - 1] = '\0';
|
---|
2057 |
|
---|
2058 | imap->uidvalidity = value;
|
---|
2059 | value = NULL;
|
---|
2060 | }
|
---|
2061 | else if(Curl_raw_equal(name, "UID") && !imap->uid) {
|
---|
2062 | if(valuelen > 0 && value[valuelen - 1] == '/')
|
---|
2063 | value[valuelen - 1] = '\0';
|
---|
2064 |
|
---|
2065 | imap->uid = value;
|
---|
2066 | value = NULL;
|
---|
2067 | }
|
---|
2068 | else if(Curl_raw_equal(name, "SECTION") && !imap->section) {
|
---|
2069 | if(valuelen > 0 && value[valuelen - 1] == '/')
|
---|
2070 | value[valuelen - 1] = '\0';
|
---|
2071 |
|
---|
2072 | imap->section = value;
|
---|
2073 | value = NULL;
|
---|
2074 | }
|
---|
2075 | else if(Curl_raw_equal(name, "PARTIAL") && !imap->partial) {
|
---|
2076 | if(valuelen > 0 && value[valuelen - 1] == '/')
|
---|
2077 | value[valuelen - 1] = '\0';
|
---|
2078 |
|
---|
2079 | imap->partial = value;
|
---|
2080 | value = NULL;
|
---|
2081 | }
|
---|
2082 | else {
|
---|
2083 | free(name);
|
---|
2084 | free(value);
|
---|
2085 |
|
---|
2086 | return CURLE_URL_MALFORMAT;
|
---|
2087 | }
|
---|
2088 |
|
---|
2089 | free(name);
|
---|
2090 | free(value);
|
---|
2091 | }
|
---|
2092 |
|
---|
2093 | /* Does the URL contain a query parameter? Only valid when we have a mailbox
|
---|
2094 | and no UID as per RFC-5092 */
|
---|
2095 | if(imap->mailbox && !imap->uid && *ptr == '?') {
|
---|
2096 | /* Find the length of the query parameter */
|
---|
2097 | begin = ++ptr;
|
---|
2098 | while(imap_is_bchar(*ptr))
|
---|
2099 | ptr++;
|
---|
2100 |
|
---|
2101 | /* Decode the query parameter */
|
---|
2102 | result = Curl_urldecode(data, begin, ptr - begin, &imap->query, NULL,
|
---|
2103 | TRUE);
|
---|
2104 | if(result)
|
---|
2105 | return result;
|
---|
2106 | }
|
---|
2107 |
|
---|
2108 | /* Any extra stuff at the end of the URL is an error */
|
---|
2109 | if(*ptr)
|
---|
2110 | return CURLE_URL_MALFORMAT;
|
---|
2111 |
|
---|
2112 | return CURLE_OK;
|
---|
2113 | }
|
---|
2114 |
|
---|
2115 | /***********************************************************************
|
---|
2116 | *
|
---|
2117 | * imap_parse_custom_request()
|
---|
2118 | *
|
---|
2119 | * Parse the custom request.
|
---|
2120 | */
|
---|
2121 | static CURLcode imap_parse_custom_request(struct connectdata *conn)
|
---|
2122 | {
|
---|
2123 | CURLcode result = CURLE_OK;
|
---|
2124 | struct SessionHandle *data = conn->data;
|
---|
2125 | struct IMAP *imap = data->req.protop;
|
---|
2126 | const char *custom = data->set.str[STRING_CUSTOMREQUEST];
|
---|
2127 |
|
---|
2128 | if(custom) {
|
---|
2129 | /* URL decode the custom request */
|
---|
2130 | result = Curl_urldecode(data, custom, 0, &imap->custom, NULL, TRUE);
|
---|
2131 |
|
---|
2132 | /* Extract the parameters if specified */
|
---|
2133 | if(!result) {
|
---|
2134 | const char *params = imap->custom;
|
---|
2135 |
|
---|
2136 | while(*params && *params != ' ')
|
---|
2137 | params++;
|
---|
2138 |
|
---|
2139 | if(*params) {
|
---|
2140 | imap->custom_params = strdup(params);
|
---|
2141 | imap->custom[params - imap->custom] = '\0';
|
---|
2142 |
|
---|
2143 | if(!imap->custom_params)
|
---|
2144 | result = CURLE_OUT_OF_MEMORY;
|
---|
2145 | }
|
---|
2146 | }
|
---|
2147 | }
|
---|
2148 |
|
---|
2149 | return result;
|
---|
2150 | }
|
---|
2151 |
|
---|
2152 | #endif /* CURL_DISABLE_IMAP */
|
---|