1 | // Copyright (c) Microsoft. All rights reserved.
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2 | // Licensed under the MIT license. See LICENSE file in the project root for full license information.
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3 |
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4 | #include <stdlib.h>
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5 | #include <stdio.h>
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6 | #include <stdint.h>
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7 | #include <stdbool.h>
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8 | #include <string.h>
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9 |
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10 | #include "mbedtls/config.h"
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11 | #include "mbedtls/debug.h"
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12 | #include "mbedtls/ssl.h"
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13 | #include "mbedtls/entropy.h"
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14 | #include "mbedtls/ctr_drbg.h"
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15 | #include "mbedtls/error.h"
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16 | #include "mbedtls/certs.h"
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17 | #include "mbedtls/entropy_poll.h"
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18 |
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19 | #include "azure_c_shared_utility/gballoc.h"
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20 | #include "azure_c_shared_utility/optimize_size.h"
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21 | #include "azure_c_shared_utility/tlsio.h"
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22 | #include "azure_c_shared_utility/tlsio_mbedtls.h"
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23 | #include "azure_c_shared_utility/socketio.h"
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24 | #include "azure_c_shared_utility/crt_abstractions.h"
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25 | #include "azure_c_shared_utility/shared_util_options.h"
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26 | #include "azure_c_shared_utility/threadapi.h"
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27 |
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28 | static const char *const OPTION_UNDERLYING_IO_OPTIONS = "underlying_io_options";
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29 |
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30 | #define HANDSHAKE_TIMEOUT_MS 5000
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31 | #define HANDSHAKE_WAIT_INTERVAL_MS 10
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32 |
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33 | typedef enum TLSIO_STATE_ENUM_TAG
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34 | {
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35 | TLSIO_STATE_NOT_OPEN,
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36 | TLSIO_STATE_OPENING_UNDERLYING_IO,
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37 | TLSIO_STATE_IN_HANDSHAKE,
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38 | TLSIO_STATE_OPEN,
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39 | TLSIO_STATE_CLOSING,
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40 | TLSIO_STATE_ERROR
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41 | } TLSIO_STATE_ENUM;
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42 |
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43 | typedef struct TLS_IO_INSTANCE_TAG
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44 | {
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45 | XIO_HANDLE socket_io;
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46 | ON_BYTES_RECEIVED on_bytes_received;
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47 | ON_IO_OPEN_COMPLETE on_io_open_complete;
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48 | ON_IO_CLOSE_COMPLETE on_io_close_complete;
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49 | ON_IO_ERROR on_io_error;
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50 | void *on_bytes_received_context;
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51 | void *on_io_open_complete_context;
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52 | void *on_io_close_complete_context;
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53 | void *on_io_error_context;
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54 | TLSIO_STATE_ENUM tlsio_state;
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55 | unsigned char *socket_io_read_bytes;
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56 | size_t socket_io_read_byte_count;
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57 | ON_SEND_COMPLETE on_send_complete;
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58 | void *on_send_complete_callback_context;
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59 |
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60 | mbedtls_entropy_context entropy;
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61 | mbedtls_ctr_drbg_context ctr_drbg;
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62 | mbedtls_ssl_context ssl;
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63 | mbedtls_ssl_config config;
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64 | mbedtls_x509_crt trusted_certificates_parsed;
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65 | mbedtls_ssl_session ssn;
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66 | char *trusted_certificates;
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67 |
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68 | char *hostname;
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69 | mbedtls_x509_crt owncert;
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70 | mbedtls_pk_context pKey;
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71 |
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72 | char* x509_certificate;
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73 | char* x509_private_key;
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74 |
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75 | int tls_status;
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76 | } TLS_IO_INSTANCE;
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77 |
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78 | typedef enum TLS_STATE_TAG
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79 | {
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80 | TLS_STATE_NOT_INITIALIZED,
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81 | TLS_STATE_INITIALIZED,
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82 | TLS_STATE_CLOSING,
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83 | } TLS_STATE;
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84 |
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85 | static void indicate_error(TLS_IO_INSTANCE *tls_io_instance)
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86 | {
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87 | if ((tls_io_instance->tlsio_state == TLSIO_STATE_NOT_OPEN) || (tls_io_instance->tlsio_state == TLSIO_STATE_ERROR))
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88 | {
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89 | return;
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90 | }
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91 | tls_io_instance->tlsio_state = TLSIO_STATE_ERROR;
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92 | if (tls_io_instance->on_io_error != NULL)
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93 | {
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94 | tls_io_instance->on_io_error(tls_io_instance->on_io_error_context);
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95 | }
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96 | }
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97 |
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98 | static void indicate_open_complete(TLS_IO_INSTANCE *tls_io_instance, IO_OPEN_RESULT open_result)
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99 | {
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100 | if (tls_io_instance->on_io_open_complete != NULL)
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101 | {
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102 | tls_io_instance->on_io_open_complete(tls_io_instance->on_io_open_complete_context, open_result);
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103 | }
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104 | }
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105 |
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106 | static int decode_ssl_received_bytes(TLS_IO_INSTANCE *tls_io_instance)
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107 | {
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108 | int result = 0;
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109 | unsigned char buffer[64];
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110 | int rcv_bytes = 1;
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111 |
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112 | while (rcv_bytes > 0)
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113 | {
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114 | rcv_bytes = mbedtls_ssl_read(&tls_io_instance->ssl, buffer, sizeof(buffer));
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115 | if (rcv_bytes > 0)
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116 | {
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117 | if (tls_io_instance->on_bytes_received != NULL)
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118 | {
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119 | tls_io_instance->on_bytes_received(tls_io_instance->on_bytes_received_context, buffer, rcv_bytes);
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120 | }
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121 | }
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122 | }
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123 |
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124 | return result;
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125 | }
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126 |
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127 | static void on_underlying_io_open_complete(void *context, IO_OPEN_RESULT open_result)
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128 | {
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129 | if (context == NULL)
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130 | {
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131 | LogError("Invalid context NULL value passed");
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132 | }
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133 | else
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134 | {
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135 | TLS_IO_INSTANCE *tls_io_instance = (TLS_IO_INSTANCE *)context;
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136 | int result = 0;
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137 |
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138 | if (open_result != IO_OPEN_OK)
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139 | {
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140 | xio_close(tls_io_instance->socket_io, NULL, NULL);
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141 | tls_io_instance->tlsio_state = TLSIO_STATE_NOT_OPEN;
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142 | indicate_open_complete(tls_io_instance, IO_OPEN_ERROR);
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143 | }
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144 | else
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145 | {
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146 | tls_io_instance->tlsio_state = TLSIO_STATE_IN_HANDSHAKE;
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147 |
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148 | do
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149 | {
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150 | result = mbedtls_ssl_handshake(&tls_io_instance->ssl);
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151 | } while (result == MBEDTLS_ERR_SSL_WANT_READ || result == MBEDTLS_ERR_SSL_WANT_WRITE);
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152 |
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153 | if (result == 0)
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154 | {
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155 | tls_io_instance->tlsio_state = TLSIO_STATE_OPEN;
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156 | indicate_open_complete(tls_io_instance, IO_OPEN_OK);
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157 | }
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158 | else
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159 | {
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160 | xio_close(tls_io_instance->socket_io, NULL, NULL);
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161 | tls_io_instance->tlsio_state = TLSIO_STATE_NOT_OPEN;
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162 | indicate_open_complete(tls_io_instance, IO_OPEN_ERROR);
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163 | }
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164 | }
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165 | }
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166 | }
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167 |
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168 | static void on_underlying_io_bytes_received(void *context, const unsigned char *buffer, size_t size)
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169 | {
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170 | if (context != NULL)
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171 | {
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172 | TLS_IO_INSTANCE *tls_io_instance = (TLS_IO_INSTANCE *)context;
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173 |
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174 | unsigned char *new_socket_io_read_bytes = (unsigned char *)realloc(tls_io_instance->socket_io_read_bytes, tls_io_instance->socket_io_read_byte_count + size);
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175 |
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176 | if (new_socket_io_read_bytes == NULL)
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177 | {
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178 | tls_io_instance->tlsio_state = TLSIO_STATE_ERROR;
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179 | indicate_error(tls_io_instance);
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180 | }
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181 | else
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182 | {
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183 | tls_io_instance->socket_io_read_bytes = new_socket_io_read_bytes;
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184 | (void)memcpy(tls_io_instance->socket_io_read_bytes + tls_io_instance->socket_io_read_byte_count, buffer, size);
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185 | tls_io_instance->socket_io_read_byte_count += size;
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186 | }
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187 | }
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188 | else
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189 | {
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190 | LogError("NULL value passed in context");
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191 | }
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192 | }
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193 |
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194 | static void on_underlying_io_error(void *context)
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195 | {
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196 | if (context == NULL)
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197 | {
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198 | LogError("Invalid context NULL value passed");
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199 | }
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200 | else
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201 | {
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202 | TLS_IO_INSTANCE *tls_io_instance = (TLS_IO_INSTANCE *)context;
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203 |
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204 | switch (tls_io_instance->tlsio_state)
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205 | {
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206 | default:
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207 | case TLSIO_STATE_NOT_OPEN:
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208 | case TLSIO_STATE_ERROR:
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209 | break;
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210 |
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211 | case TLSIO_STATE_OPENING_UNDERLYING_IO:
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212 | case TLSIO_STATE_IN_HANDSHAKE:
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213 | // Existing socket impls are all synchronous close, and this
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214 | // adapter does not yet support async close.
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215 | xio_close(tls_io_instance->socket_io, NULL, NULL);
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216 | tls_io_instance->tlsio_state = TLSIO_STATE_NOT_OPEN;
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217 | indicate_open_complete(tls_io_instance, IO_OPEN_ERROR);
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218 | break;
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219 |
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220 | case TLSIO_STATE_OPEN:
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221 | indicate_error(tls_io_instance);
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222 | break;
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223 | }
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224 | }
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225 | }
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226 |
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227 | static void on_underlying_io_close_complete_during_close(void *context)
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228 | {
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229 | if (context == NULL)
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230 | {
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231 | LogError("NULL value passed in context");
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232 | }
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233 | else
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234 | {
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235 | TLS_IO_INSTANCE *tls_io_instance = (TLS_IO_INSTANCE *)context;
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236 |
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237 | tls_io_instance->tlsio_state = TLSIO_STATE_NOT_OPEN;
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238 |
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239 | if (tls_io_instance->on_io_close_complete != NULL)
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240 | {
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241 | tls_io_instance->on_io_close_complete(tls_io_instance->on_io_close_complete_context);
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242 | }
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243 | }
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244 | }
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245 |
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246 | static int on_io_recv(void *context, unsigned char *buf, size_t sz)
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247 | {
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248 | int result;
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249 | if (context == NULL)
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250 | {
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251 | LogError("Invalid context NULL value passed");
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252 | result = MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
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253 | }
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254 | else
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255 | {
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256 | TLS_IO_INSTANCE *tls_io_instance = (TLS_IO_INSTANCE *)context;
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257 | unsigned char *new_socket_io_read_bytes;
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258 | int pending = 0;
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259 |
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260 | while (tls_io_instance->socket_io_read_byte_count == 0)
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261 | {
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262 | xio_dowork(tls_io_instance->socket_io);
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263 |
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264 | if (tls_io_instance->tlsio_state == TLSIO_STATE_OPEN)
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265 | {
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266 | break;
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267 | }
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268 | else if (tls_io_instance->tlsio_state == TLSIO_STATE_NOT_OPEN ||
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269 | tls_io_instance->tlsio_state == TLSIO_STATE_CLOSING ||
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270 | tls_io_instance->tlsio_state == TLSIO_STATE_ERROR)
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271 | {
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272 | // Underlying io error, exit.
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273 | return MBEDTLS_ERR_SSL_INTERNAL_ERROR;
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274 | }
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275 | else
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276 | {
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277 | // Handkshake
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278 | if (tls_io_instance->socket_io_read_byte_count == 0)
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279 | {
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280 | if (pending++ >= HANDSHAKE_TIMEOUT_MS / HANDSHAKE_WAIT_INTERVAL_MS)
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281 | {
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282 | // The connection is close from server side and no response.
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283 | LogError("Tlsio_Failure: encountered unknow connection issue, the connection will be restarted.");
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284 | indicate_error(tls_io_instance);
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285 | return MBEDTLS_ERR_SSL_INTERNAL_ERROR;
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286 | }
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287 | ThreadAPI_Sleep(HANDSHAKE_WAIT_INTERVAL_MS);
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288 | }
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289 | }
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290 | }
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291 |
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292 | result = tls_io_instance->socket_io_read_byte_count;
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293 | if (result > (int)sz)
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294 | {
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295 | result = sz;
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296 | }
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297 |
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298 | if (result > 0)
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299 | {
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300 | (void)memcpy((void *)buf, tls_io_instance->socket_io_read_bytes, result);
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301 | (void)memmove(tls_io_instance->socket_io_read_bytes, tls_io_instance->socket_io_read_bytes + result, tls_io_instance->socket_io_read_byte_count - result);
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302 | tls_io_instance->socket_io_read_byte_count -= result;
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303 | if (tls_io_instance->socket_io_read_byte_count > 0)
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304 | {
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305 | new_socket_io_read_bytes = (unsigned char *)realloc(tls_io_instance->socket_io_read_bytes, tls_io_instance->socket_io_read_byte_count);
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306 | if (new_socket_io_read_bytes != NULL)
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307 | {
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308 | tls_io_instance->socket_io_read_bytes = new_socket_io_read_bytes;
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309 | }
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310 | }
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311 | else
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312 | {
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313 | free(tls_io_instance->socket_io_read_bytes);
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314 | tls_io_instance->socket_io_read_bytes = NULL;
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315 | }
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316 | }
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317 |
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318 | if ((result == 0) && (tls_io_instance->tlsio_state == TLSIO_STATE_OPEN))
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319 | {
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320 | result = MBEDTLS_ERR_SSL_WANT_READ;
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321 | }
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322 | }
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323 | return result;
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324 | }
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325 |
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326 | static int on_io_send(void *context, const unsigned char *buf, size_t sz)
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327 | {
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328 | int result;
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329 | if (context == NULL)
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330 | {
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331 | LogError("Invalid context NULL value passed");
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332 | result = 0;
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333 | }
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334 | else
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335 | {
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336 | TLS_IO_INSTANCE *tls_io_instance = (TLS_IO_INSTANCE *)context;
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337 |
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338 | if (xio_send(tls_io_instance->socket_io, buf, sz, tls_io_instance->on_send_complete, tls_io_instance->on_send_complete_callback_context) != 0)
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339 | {
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340 | indicate_error(tls_io_instance);
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341 | result = -1;
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342 | }
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343 | else
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344 | {
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345 | result = sz;
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346 | }
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347 | }
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348 | return result;
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349 | }
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350 |
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351 | static int tlsio_entropy_poll(void *v, unsigned char *output, size_t len, size_t *olen)
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352 | {
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353 | (void)v;
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354 | int result = 0;
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355 | srand((unsigned int)time(NULL));
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356 | for (uint16_t i = 0; i < len; i++)
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357 | {
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358 | output[i] = rand() % 256;
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359 | }
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360 | *olen = len;
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361 | return result;
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362 | }
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363 |
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364 | // Un-initialize mbedTLS
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365 | static void mbedtls_uninit(TLS_IO_INSTANCE *tls_io_instance)
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366 | {
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367 | if (tls_io_instance->tls_status != TLS_STATE_NOT_INITIALIZED)
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368 | {
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369 | // mbedTLS cleanup...
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370 | mbedtls_ssl_close_notify(&tls_io_instance->ssl);
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371 | mbedtls_ssl_free(&tls_io_instance->ssl);
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372 | mbedtls_ssl_config_free(&tls_io_instance->config);
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373 | mbedtls_x509_crt_free(&tls_io_instance->trusted_certificates_parsed);
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374 | mbedtls_ctr_drbg_free(&tls_io_instance->ctr_drbg);
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375 | mbedtls_entropy_free(&tls_io_instance->entropy);
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376 |
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377 | tls_io_instance->tls_status = TLS_STATE_NOT_INITIALIZED;
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378 | }
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379 | else
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380 | {
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381 | LogError("Uninitialzing when not previously initialized");
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382 | }
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383 | }
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384 |
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385 | static void mbedtls_init(TLS_IO_INSTANCE *tls_io_instance)
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386 | {
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387 | const char* pers = "azure_iot_client";
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388 | if (tls_io_instance->tls_status != TLS_STATE_INITIALIZED)
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389 | {
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390 | if (tls_io_instance->tls_status == TLS_STATE_CLOSING)
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391 | {
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392 | // The underlying connection has been closed, so here un-initialize first
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393 | mbedtls_uninit(tls_io_instance);
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394 | }
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395 |
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396 | // mbedTLS initialize...
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397 | mbedtls_x509_crt_init(&tls_io_instance->trusted_certificates_parsed);
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398 |
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399 | mbedtls_entropy_init(&tls_io_instance->entropy);
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400 | // Add a weak entropy source here,avoid some platform doesn't have strong / hardware entropy
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401 | mbedtls_entropy_add_source(&tls_io_instance->entropy, tlsio_entropy_poll, NULL, MBEDTLS_ENTROPY_MAX_GATHER, MBEDTLS_ENTROPY_SOURCE_WEAK);
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402 |
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403 | mbedtls_ctr_drbg_init(&tls_io_instance->ctr_drbg);
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404 | mbedtls_ctr_drbg_seed(&tls_io_instance->ctr_drbg, mbedtls_entropy_func, &tls_io_instance->entropy, (const unsigned char *)pers, strlen(pers));
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405 |
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406 | mbedtls_ssl_config_init(&tls_io_instance->config);
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407 | mbedtls_ssl_config_defaults(&tls_io_instance->config, MBEDTLS_SSL_IS_CLIENT, MBEDTLS_SSL_TRANSPORT_STREAM, MBEDTLS_SSL_PRESET_DEFAULT);
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408 | mbedtls_ssl_conf_rng(&tls_io_instance->config, mbedtls_ctr_drbg_random, &tls_io_instance->ctr_drbg);
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409 | mbedtls_ssl_conf_authmode(&tls_io_instance->config, MBEDTLS_SSL_VERIFY_REQUIRED);
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410 | mbedtls_ssl_conf_min_version(&tls_io_instance->config, MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3); // v1.2
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411 | #if defined(MBEDTLS_SSL_RENEGOTIATION)
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412 | mbedtls_ssl_conf_renegotiation(&tls_io_instance->config, MBEDTLS_SSL_RENEGOTIATION_ENABLED);
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413 | #endif
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414 |
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415 | mbedtls_ssl_init(&tls_io_instance->ssl);
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416 | mbedtls_ssl_set_bio(&tls_io_instance->ssl, tls_io_instance, on_io_send, on_io_recv, NULL);
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417 | mbedtls_ssl_set_hostname(&tls_io_instance->ssl, tls_io_instance->hostname);
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418 |
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419 | mbedtls_ssl_session_init(&tls_io_instance->ssn);
|
---|
420 |
|
---|
421 | mbedtls_ssl_set_session(&tls_io_instance->ssl, &tls_io_instance->ssn);
|
---|
422 | mbedtls_ssl_setup(&tls_io_instance->ssl, &tls_io_instance->config);
|
---|
423 |
|
---|
424 | tls_io_instance->tls_status = TLS_STATE_INITIALIZED;
|
---|
425 | }
|
---|
426 | }
|
---|
427 |
|
---|
428 | CONCRETE_IO_HANDLE tlsio_mbedtls_create(void *io_create_parameters)
|
---|
429 | {
|
---|
430 | TLSIO_CONFIG *tls_io_config = (TLSIO_CONFIG *)io_create_parameters;
|
---|
431 | TLS_IO_INSTANCE *result;
|
---|
432 |
|
---|
433 | if (tls_io_config == NULL)
|
---|
434 | {
|
---|
435 | LogError("NULL tls_io_config");
|
---|
436 | result = NULL;
|
---|
437 | }
|
---|
438 | else
|
---|
439 | {
|
---|
440 | /* Codes_SRS_TLSIO_MBED_OS5_TLS_99_006: [ The tlsio_mbedtls_create shall return NULL if allocating memory for TLS_IO_INSTANCE failed. ]*/
|
---|
441 | result = calloc(1, sizeof(TLS_IO_INSTANCE));
|
---|
442 | if (result != NULL)
|
---|
443 | {
|
---|
444 | SOCKETIO_CONFIG socketio_config;
|
---|
445 | const IO_INTERFACE_DESCRIPTION *underlying_io_interface;
|
---|
446 | void *io_interface_parameters;
|
---|
447 |
|
---|
448 | if (tls_io_config->underlying_io_interface != NULL)
|
---|
449 | {
|
---|
450 | underlying_io_interface = tls_io_config->underlying_io_interface;
|
---|
451 | io_interface_parameters = tls_io_config->underlying_io_parameters;
|
---|
452 | }
|
---|
453 | else
|
---|
454 | {
|
---|
455 | socketio_config.hostname = tls_io_config->hostname;
|
---|
456 | socketio_config.port = tls_io_config->port;
|
---|
457 | socketio_config.accepted_socket = NULL;
|
---|
458 | underlying_io_interface = socketio_get_interface_description();
|
---|
459 | io_interface_parameters = &socketio_config;
|
---|
460 | }
|
---|
461 |
|
---|
462 | if (underlying_io_interface == NULL)
|
---|
463 | {
|
---|
464 | free(result);
|
---|
465 | result = NULL;
|
---|
466 | LogError("Failed getting socket IO interface description.");
|
---|
467 | }
|
---|
468 | else
|
---|
469 | {
|
---|
470 | if (mallocAndStrcpy_s((char **)&result->hostname, tls_io_config->hostname) != 0)
|
---|
471 | {
|
---|
472 | free(result);
|
---|
473 | result = NULL;
|
---|
474 | LogError("Failure allocating hostname.");
|
---|
475 | }
|
---|
476 | else if ((result->socket_io = xio_create(underlying_io_interface, io_interface_parameters)) == NULL)
|
---|
477 | {
|
---|
478 | LogError("socket xio create failed");
|
---|
479 | free(result->hostname);
|
---|
480 | free(result);
|
---|
481 | result = NULL;
|
---|
482 | }
|
---|
483 | else
|
---|
484 | {
|
---|
485 | result->tls_status = TLS_STATE_NOT_INITIALIZED;
|
---|
486 | mbedtls_init((void*)result);
|
---|
487 |
|
---|
488 | result->tlsio_state = TLSIO_STATE_NOT_OPEN;
|
---|
489 | }
|
---|
490 | }
|
---|
491 | }
|
---|
492 | else
|
---|
493 | {
|
---|
494 | LogError("Failure allocating TLS object");
|
---|
495 | }
|
---|
496 | }
|
---|
497 |
|
---|
498 | return result;
|
---|
499 | }
|
---|
500 |
|
---|
501 | void tlsio_mbedtls_destroy(CONCRETE_IO_HANDLE tls_io)
|
---|
502 | {
|
---|
503 | if (tls_io != NULL)
|
---|
504 | {
|
---|
505 | TLS_IO_INSTANCE *tls_io_instance = (TLS_IO_INSTANCE *)tls_io;
|
---|
506 |
|
---|
507 | mbedtls_uninit(tls_io_instance);
|
---|
508 |
|
---|
509 | xio_close(tls_io_instance->socket_io, NULL, NULL);
|
---|
510 |
|
---|
511 | if (tls_io_instance->socket_io_read_bytes != NULL)
|
---|
512 | {
|
---|
513 | free(tls_io_instance->socket_io_read_bytes);
|
---|
514 | tls_io_instance->socket_io_read_bytes = NULL;
|
---|
515 | }
|
---|
516 | xio_destroy(tls_io_instance->socket_io);
|
---|
517 | if (tls_io_instance->hostname != NULL)
|
---|
518 | {
|
---|
519 | free(tls_io_instance->hostname);
|
---|
520 | tls_io_instance->hostname = NULL;
|
---|
521 | }
|
---|
522 | if (tls_io_instance->trusted_certificates != NULL)
|
---|
523 | {
|
---|
524 | free(tls_io_instance->trusted_certificates);
|
---|
525 | tls_io_instance->trusted_certificates = NULL;
|
---|
526 | }
|
---|
527 | if (tls_io_instance->x509_certificate != NULL)
|
---|
528 | {
|
---|
529 | free(tls_io_instance->x509_certificate);
|
---|
530 | tls_io_instance->x509_certificate = NULL;
|
---|
531 | }
|
---|
532 | if (tls_io_instance->x509_private_key != NULL)
|
---|
533 | {
|
---|
534 | free(tls_io_instance->x509_private_key);
|
---|
535 | tls_io_instance->x509_private_key = NULL;
|
---|
536 | }
|
---|
537 | free(tls_io);
|
---|
538 | }
|
---|
539 | }
|
---|
540 |
|
---|
541 | int tlsio_mbedtls_open(CONCRETE_IO_HANDLE tls_io, ON_IO_OPEN_COMPLETE on_io_open_complete, void *on_io_open_complete_context, ON_BYTES_RECEIVED on_bytes_received, void *on_bytes_received_context, ON_IO_ERROR on_io_error, void *on_io_error_context)
|
---|
542 | {
|
---|
543 | int result = 0;
|
---|
544 |
|
---|
545 | if (tls_io == NULL)
|
---|
546 | {
|
---|
547 | LogError("Invalid parameter specified tls_io: NULL");
|
---|
548 | result = MU_FAILURE;
|
---|
549 | }
|
---|
550 | else
|
---|
551 | {
|
---|
552 | TLS_IO_INSTANCE *tls_io_instance = (TLS_IO_INSTANCE *)tls_io;
|
---|
553 |
|
---|
554 | if (tls_io_instance->tlsio_state != TLSIO_STATE_NOT_OPEN)
|
---|
555 | {
|
---|
556 | LogError("IO should not be open: %d", tls_io_instance->tlsio_state);
|
---|
557 | result = MU_FAILURE;
|
---|
558 | }
|
---|
559 | else
|
---|
560 | {
|
---|
561 |
|
---|
562 | tls_io_instance->on_bytes_received = on_bytes_received;
|
---|
563 | tls_io_instance->on_bytes_received_context = on_bytes_received_context;
|
---|
564 |
|
---|
565 | tls_io_instance->on_io_open_complete = on_io_open_complete;
|
---|
566 | tls_io_instance->on_io_open_complete_context = on_io_open_complete_context;
|
---|
567 |
|
---|
568 | tls_io_instance->on_io_error = on_io_error;
|
---|
569 | tls_io_instance->on_io_error_context = on_io_error_context;
|
---|
570 |
|
---|
571 | tls_io_instance->tlsio_state = TLSIO_STATE_OPENING_UNDERLYING_IO;
|
---|
572 |
|
---|
573 | mbedtls_ssl_session_reset(&tls_io_instance->ssl);
|
---|
574 |
|
---|
575 | if (xio_open(tls_io_instance->socket_io, on_underlying_io_open_complete, tls_io_instance, on_underlying_io_bytes_received, tls_io_instance, on_underlying_io_error, tls_io_instance) != 0)
|
---|
576 | {
|
---|
577 |
|
---|
578 | LogError("Underlying IO open failed");
|
---|
579 | tls_io_instance->tlsio_state = TLSIO_STATE_NOT_OPEN;
|
---|
580 | result = MU_FAILURE;
|
---|
581 | }
|
---|
582 | }
|
---|
583 | }
|
---|
584 | return result;
|
---|
585 | }
|
---|
586 |
|
---|
587 | int tlsio_mbedtls_close(CONCRETE_IO_HANDLE tls_io, ON_IO_CLOSE_COMPLETE on_io_close_complete, void *callback_context)
|
---|
588 | {
|
---|
589 | int result = 0;
|
---|
590 |
|
---|
591 | if (tls_io == NULL)
|
---|
592 | {
|
---|
593 | LogError("Invalid parameter specified tls_io: NULL");
|
---|
594 | result = MU_FAILURE;
|
---|
595 | }
|
---|
596 | else
|
---|
597 | {
|
---|
598 | TLS_IO_INSTANCE *tls_io_instance = (TLS_IO_INSTANCE *)tls_io;
|
---|
599 |
|
---|
600 | if ((tls_io_instance->tlsio_state == TLSIO_STATE_NOT_OPEN) ||
|
---|
601 | (tls_io_instance->tlsio_state == TLSIO_STATE_CLOSING))
|
---|
602 | {
|
---|
603 | LogError("IO should not be closed: %d", tls_io_instance->tlsio_state);
|
---|
604 | result = MU_FAILURE;
|
---|
605 | }
|
---|
606 | else
|
---|
607 | {
|
---|
608 | if (tls_io_instance->tls_status == TLS_STATE_INITIALIZED)
|
---|
609 | {
|
---|
610 | mbedtls_ssl_close_notify(&tls_io_instance->ssl);
|
---|
611 | }
|
---|
612 |
|
---|
613 | tls_io_instance->tlsio_state = TLSIO_STATE_CLOSING;
|
---|
614 | tls_io_instance->on_io_close_complete = on_io_close_complete;
|
---|
615 | tls_io_instance->on_io_close_complete_context = callback_context;
|
---|
616 | if (xio_close(tls_io_instance->socket_io, on_underlying_io_close_complete_during_close, tls_io_instance) != 0)
|
---|
617 | {
|
---|
618 | LogError("xio_close failed");
|
---|
619 | result = MU_FAILURE;
|
---|
620 | }
|
---|
621 | else
|
---|
622 | {
|
---|
623 | result = 0;
|
---|
624 | }
|
---|
625 | }
|
---|
626 | }
|
---|
627 | return result;
|
---|
628 | }
|
---|
629 |
|
---|
630 | int tlsio_mbedtls_send(CONCRETE_IO_HANDLE tls_io, const void *buffer, size_t size, ON_SEND_COMPLETE on_send_complete, void *callback_context)
|
---|
631 | {
|
---|
632 | int result = 0;
|
---|
633 |
|
---|
634 | if (tls_io == NULL || (buffer == NULL) || (size == 0))
|
---|
635 | {
|
---|
636 | LogError("Invalid parameter specified tls_io: %p, buffer: %p, size: %ul", tls_io, buffer, (unsigned int)size);
|
---|
637 | result = MU_FAILURE;
|
---|
638 | }
|
---|
639 | else
|
---|
640 | {
|
---|
641 | TLS_IO_INSTANCE *tls_io_instance = (TLS_IO_INSTANCE *)tls_io;
|
---|
642 | if (tls_io_instance->tlsio_state != TLSIO_STATE_OPEN)
|
---|
643 | {
|
---|
644 | LogError("Invalid state specified %d", tls_io_instance->tlsio_state);
|
---|
645 | result = MU_FAILURE;
|
---|
646 | }
|
---|
647 | else
|
---|
648 | {
|
---|
649 | tls_io_instance->on_send_complete = on_send_complete;
|
---|
650 | tls_io_instance->on_send_complete_callback_context = callback_context;
|
---|
651 | int res = mbedtls_ssl_write(&tls_io_instance->ssl, buffer, size);
|
---|
652 | if (res != (int)size)
|
---|
653 | {
|
---|
654 | LogError("Unexpected data size returned from mbedtls_ssl_write %d/%d", res, (int)size);
|
---|
655 | result = MU_FAILURE;
|
---|
656 | }
|
---|
657 | else
|
---|
658 | {
|
---|
659 | result = 0;
|
---|
660 | }
|
---|
661 | tls_io_instance->on_send_complete = NULL;
|
---|
662 | tls_io_instance->on_send_complete_callback_context = NULL;
|
---|
663 | }
|
---|
664 | }
|
---|
665 | return result;
|
---|
666 | }
|
---|
667 |
|
---|
668 | void tlsio_mbedtls_dowork(CONCRETE_IO_HANDLE tls_io)
|
---|
669 | {
|
---|
670 | if (tls_io != NULL)
|
---|
671 | {
|
---|
672 | TLS_IO_INSTANCE *tls_io_instance = (TLS_IO_INSTANCE *)tls_io;
|
---|
673 |
|
---|
674 | if (tls_io_instance->tlsio_state == TLSIO_STATE_OPENING_UNDERLYING_IO)
|
---|
675 | {
|
---|
676 | xio_dowork(tls_io_instance->socket_io);
|
---|
677 | }
|
---|
678 | else if (tls_io_instance->tlsio_state == TLSIO_STATE_IN_HANDSHAKE || tls_io_instance->tlsio_state == TLSIO_STATE_OPEN)
|
---|
679 | {
|
---|
680 | decode_ssl_received_bytes(tls_io_instance);
|
---|
681 | // Note: no need to call xio_dowork here because it's called in on_io_recv which is the callback function of decode_ssl_received_bytes
|
---|
682 | }
|
---|
683 | }
|
---|
684 | }
|
---|
685 |
|
---|
686 | /*this function will clone an option given by name and value*/
|
---|
687 | static void *tlsio_mbedtls_CloneOption(const char *name, const void *value)
|
---|
688 | {
|
---|
689 | void *result = NULL;
|
---|
690 | if (name == NULL || value == NULL)
|
---|
691 | {
|
---|
692 | LogError("invalid parameter detected: const char* name=%p, const void* value=%p", name, value);
|
---|
693 | result = NULL;
|
---|
694 | }
|
---|
695 | else
|
---|
696 | {
|
---|
697 | if (strcmp(name, OPTION_UNDERLYING_IO_OPTIONS) == 0)
|
---|
698 | {
|
---|
699 | result = (void *)value;
|
---|
700 | }
|
---|
701 | else if (strcmp(name, OPTION_TRUSTED_CERT) == 0)
|
---|
702 | {
|
---|
703 | if (mallocAndStrcpy_s((char **)&result, value) != 0)
|
---|
704 | {
|
---|
705 | LogError("unable to mallocAndStrcpy_s TrustedCerts value");
|
---|
706 | result = NULL;
|
---|
707 | }
|
---|
708 | else
|
---|
709 | {
|
---|
710 | /*return as is*/
|
---|
711 | }
|
---|
712 | }
|
---|
713 | else if (strcmp(name, SU_OPTION_X509_CERT) == 0)
|
---|
714 | {
|
---|
715 | if (mallocAndStrcpy_s((char**)&result, value) != 0)
|
---|
716 | {
|
---|
717 | LogError("unable to mallocAndStrcpy_s x509certificate value");
|
---|
718 | result = NULL;
|
---|
719 | }
|
---|
720 | else
|
---|
721 | {
|
---|
722 | /*return as is*/
|
---|
723 | }
|
---|
724 | }
|
---|
725 | else if (strcmp(name, SU_OPTION_X509_PRIVATE_KEY) == 0)
|
---|
726 | {
|
---|
727 | if (mallocAndStrcpy_s((char**)&result, value) != 0)
|
---|
728 | {
|
---|
729 | LogError("unable to mallocAndStrcpy_s x509privatekey value");
|
---|
730 | result = NULL;
|
---|
731 | }
|
---|
732 | else
|
---|
733 | {
|
---|
734 | /*return as is*/
|
---|
735 | }
|
---|
736 | }
|
---|
737 | else if (strcmp(name, OPTION_X509_ECC_CERT) == 0)
|
---|
738 | {
|
---|
739 | if (mallocAndStrcpy_s((char**)&result, value) != 0)
|
---|
740 | {
|
---|
741 | LogError("unable to mallocAndStrcpy_s x509EccCertificate value");
|
---|
742 | result = NULL;
|
---|
743 | }
|
---|
744 | else
|
---|
745 | {
|
---|
746 | /*return as is*/
|
---|
747 | }
|
---|
748 | }
|
---|
749 | else if (strcmp(name, OPTION_X509_ECC_KEY) == 0)
|
---|
750 | {
|
---|
751 | if (mallocAndStrcpy_s((char**)&result, value) != 0)
|
---|
752 | {
|
---|
753 | LogError("unable to mallocAndStrcpy_s x509EccKey value");
|
---|
754 | result = NULL;
|
---|
755 | }
|
---|
756 | else
|
---|
757 | {
|
---|
758 | /*return as is*/
|
---|
759 | }
|
---|
760 | }
|
---|
761 | else
|
---|
762 | {
|
---|
763 | LogError("not handled option : %s", name);
|
---|
764 | result = NULL;
|
---|
765 | }
|
---|
766 | }
|
---|
767 | return result;
|
---|
768 | }
|
---|
769 |
|
---|
770 | /*this function destroys an option previously created*/
|
---|
771 | static void tlsio_mbedtls_DestroyOption(const char *name, const void *value)
|
---|
772 | {
|
---|
773 | /*since all options for this layer are actually string copies., disposing of one is just calling free*/
|
---|
774 | if (name == NULL || value == NULL)
|
---|
775 | {
|
---|
776 | LogError("invalid parameter detected: const char* name=%p, const void* value=%p", name, value);
|
---|
777 | }
|
---|
778 | else
|
---|
779 | {
|
---|
780 | if (
|
---|
781 | (strcmp(name, OPTION_TRUSTED_CERT) == 0) ||
|
---|
782 | (strcmp(name, SU_OPTION_X509_CERT) == 0) ||
|
---|
783 | (strcmp(name, SU_OPTION_X509_PRIVATE_KEY) == 0) ||
|
---|
784 | (strcmp(name, OPTION_X509_ECC_CERT) == 0) ||
|
---|
785 | (strcmp(name, OPTION_X509_ECC_KEY) == 0)
|
---|
786 | )
|
---|
787 | {
|
---|
788 | free((void*)value);
|
---|
789 | }
|
---|
790 | else if (strcmp(name, OPTION_UNDERLYING_IO_OPTIONS) == 0)
|
---|
791 | {
|
---|
792 | OptionHandler_Destroy((OPTIONHANDLER_HANDLE)value);
|
---|
793 | }
|
---|
794 | else
|
---|
795 | {
|
---|
796 | LogError("not handled option : %s", name);
|
---|
797 | }
|
---|
798 | }
|
---|
799 | }
|
---|
800 |
|
---|
801 | int tlsio_mbedtls_setoption(CONCRETE_IO_HANDLE tls_io, const char *optionName, const void *value)
|
---|
802 | {
|
---|
803 | int result = 0;
|
---|
804 |
|
---|
805 | if (tls_io == NULL || optionName == NULL)
|
---|
806 | {
|
---|
807 | result = MU_FAILURE;
|
---|
808 | }
|
---|
809 | else
|
---|
810 | {
|
---|
811 | TLS_IO_INSTANCE *tls_io_instance = (TLS_IO_INSTANCE *)tls_io;
|
---|
812 |
|
---|
813 | if (strcmp(OPTION_TRUSTED_CERT, optionName) == 0)
|
---|
814 | {
|
---|
815 | if (tls_io_instance->trusted_certificates != NULL)
|
---|
816 | {
|
---|
817 | // Free the memory if it has been previously allocated
|
---|
818 | free(tls_io_instance->trusted_certificates);
|
---|
819 | tls_io_instance->trusted_certificates = NULL;
|
---|
820 | }
|
---|
821 | if (mallocAndStrcpy_s(&tls_io_instance->trusted_certificates, (const char *)value) != 0)
|
---|
822 | {
|
---|
823 | LogError("unable to mallocAndStrcpy_s");
|
---|
824 | result = MU_FAILURE;
|
---|
825 | }
|
---|
826 | else
|
---|
827 | {
|
---|
828 | int parse_result = mbedtls_x509_crt_parse(&tls_io_instance->trusted_certificates_parsed, (const unsigned char *)value, (int)(strlen(value) + 1));
|
---|
829 | if (parse_result != 0)
|
---|
830 | {
|
---|
831 | LogInfo("Malformed pem certificate");
|
---|
832 | result = MU_FAILURE;
|
---|
833 | }
|
---|
834 | else
|
---|
835 | {
|
---|
836 | mbedtls_ssl_conf_ca_chain(&tls_io_instance->config, &tls_io_instance->trusted_certificates_parsed, NULL);
|
---|
837 | }
|
---|
838 | }
|
---|
839 | }
|
---|
840 | else if (strcmp(SU_OPTION_X509_CERT, optionName) == 0 || strcmp(OPTION_X509_ECC_CERT, optionName) == 0)
|
---|
841 | {
|
---|
842 | if (tls_io_instance->x509_certificate != NULL)
|
---|
843 | {
|
---|
844 | // Free the memory if it has been previously allocated
|
---|
845 | free(tls_io_instance->x509_certificate);
|
---|
846 | }
|
---|
847 |
|
---|
848 | if (mallocAndStrcpy_s(&tls_io_instance->x509_certificate, (const char *)value) != 0)
|
---|
849 | {
|
---|
850 | LogError("unable to mallocAndStrcpy_s on certificate");
|
---|
851 | result = MU_FAILURE;
|
---|
852 | }
|
---|
853 | else if (mbedtls_x509_crt_parse(&tls_io_instance->owncert, (const unsigned char *)value, (int)(strlen(value) + 1)) != 0)
|
---|
854 | {
|
---|
855 | LogError("failure parsing certificate");
|
---|
856 | free(tls_io_instance->x509_certificate);
|
---|
857 | result = MU_FAILURE;
|
---|
858 | }
|
---|
859 | else if (tls_io_instance->pKey.pk_info != NULL && mbedtls_ssl_conf_own_cert(&tls_io_instance->config, &tls_io_instance->owncert, &tls_io_instance->pKey) != 0)
|
---|
860 | {
|
---|
861 | LogError("failure calling mbedtls_ssl_conf_own_cert");
|
---|
862 | free(tls_io_instance->x509_certificate);
|
---|
863 | result = MU_FAILURE;
|
---|
864 | }
|
---|
865 | else
|
---|
866 | {
|
---|
867 | result = 0;
|
---|
868 | }
|
---|
869 | }
|
---|
870 | else if (strcmp(SU_OPTION_X509_PRIVATE_KEY, optionName) == 0 || strcmp(OPTION_X509_ECC_KEY, optionName) == 0)
|
---|
871 | {
|
---|
872 | if (tls_io_instance->x509_private_key != NULL)
|
---|
873 | {
|
---|
874 | // Free the memory if it has been previously allocated
|
---|
875 | free(tls_io_instance->x509_private_key);
|
---|
876 | }
|
---|
877 |
|
---|
878 | if (mallocAndStrcpy_s(&tls_io_instance->x509_private_key, (const char *)value) != 0)
|
---|
879 | {
|
---|
880 | LogError("unable to mallocAndStrcpy_s on private key");
|
---|
881 | result = MU_FAILURE;
|
---|
882 | }
|
---|
883 | else if (mbedtls_pk_parse_key(&tls_io_instance->pKey, (const unsigned char *)value, (int)(strlen(value) + 1), NULL, 0) != 0)
|
---|
884 | {
|
---|
885 | LogError("failure parsing Private Key");
|
---|
886 | free(tls_io_instance->x509_private_key);
|
---|
887 | result = MU_FAILURE;
|
---|
888 | }
|
---|
889 | else if (tls_io_instance->owncert.version > 0 && mbedtls_ssl_conf_own_cert(&tls_io_instance->config, &tls_io_instance->owncert, &tls_io_instance->pKey))
|
---|
890 | {
|
---|
891 | LogError("failure calling mbedtls_ssl_conf_own_cert on cert");
|
---|
892 | free(tls_io_instance->x509_private_key);
|
---|
893 | result = MU_FAILURE;
|
---|
894 | }
|
---|
895 | else
|
---|
896 | {
|
---|
897 | result = 0;
|
---|
898 | }
|
---|
899 | }
|
---|
900 | else if (strcmp(optionName, OPTION_UNDERLYING_IO_OPTIONS) == 0)
|
---|
901 | {
|
---|
902 | if (OptionHandler_FeedOptions((OPTIONHANDLER_HANDLE)value, (void*)tls_io_instance->socket_io) != OPTIONHANDLER_OK)
|
---|
903 | {
|
---|
904 | LogError("failed feeding options to underlying I/O instance");
|
---|
905 | result = MU_FAILURE;
|
---|
906 | }
|
---|
907 | else
|
---|
908 | {
|
---|
909 | result = 0;
|
---|
910 | }
|
---|
911 | }
|
---|
912 | else
|
---|
913 | {
|
---|
914 | // tls_io_instance->socket_io is never NULL
|
---|
915 | result = xio_setoption(tls_io_instance->socket_io, optionName, value);
|
---|
916 | }
|
---|
917 | }
|
---|
918 |
|
---|
919 | return result;
|
---|
920 | }
|
---|
921 |
|
---|
922 | OPTIONHANDLER_HANDLE tlsio_mbedtls_retrieveoptions(CONCRETE_IO_HANDLE handle)
|
---|
923 | {
|
---|
924 | OPTIONHANDLER_HANDLE result = NULL;
|
---|
925 | if (handle == NULL)
|
---|
926 | {
|
---|
927 | LogError("invalid parameter detected: CONCRETE_IO_HANDLE handle=%p", handle);
|
---|
928 | result = NULL;
|
---|
929 | }
|
---|
930 | else
|
---|
931 | {
|
---|
932 | result = OptionHandler_Create(tlsio_mbedtls_CloneOption, tlsio_mbedtls_DestroyOption, tlsio_mbedtls_setoption);
|
---|
933 | if (result == NULL)
|
---|
934 | {
|
---|
935 | LogError("unable to OptionHandler_Create");
|
---|
936 | /*return as is*/
|
---|
937 | }
|
---|
938 | else
|
---|
939 | {
|
---|
940 | /*this layer cares about the certificates*/
|
---|
941 | TLS_IO_INSTANCE *tls_io_instance = (TLS_IO_INSTANCE *)handle;
|
---|
942 | OPTIONHANDLER_HANDLE underlying_io_options;
|
---|
943 |
|
---|
944 | if ((underlying_io_options = xio_retrieveoptions(tls_io_instance->socket_io)) == NULL ||
|
---|
945 | OptionHandler_AddOption(result, OPTION_UNDERLYING_IO_OPTIONS, underlying_io_options) != OPTIONHANDLER_OK)
|
---|
946 | {
|
---|
947 | LogError("unable to save underlying_io options");
|
---|
948 | OptionHandler_Destroy(underlying_io_options);
|
---|
949 | OptionHandler_Destroy(result);
|
---|
950 | result = NULL;
|
---|
951 | }
|
---|
952 | else if (tls_io_instance->trusted_certificates != NULL &&
|
---|
953 | OptionHandler_AddOption(result, OPTION_TRUSTED_CERT, tls_io_instance->trusted_certificates) != OPTIONHANDLER_OK)
|
---|
954 | {
|
---|
955 | LogError("unable to save TrustedCerts option");
|
---|
956 | OptionHandler_Destroy(result);
|
---|
957 | result = NULL;
|
---|
958 | }
|
---|
959 | else if (&tls_io_instance->owncert != NULL && tls_io_instance->x509_certificate != NULL &&
|
---|
960 | OptionHandler_AddOption(result, SU_OPTION_X509_CERT, tls_io_instance->x509_certificate) != OPTIONHANDLER_OK)
|
---|
961 | {
|
---|
962 | LogError("unable to save x509certificate option");
|
---|
963 | OptionHandler_Destroy(result);
|
---|
964 | result = NULL;
|
---|
965 | }
|
---|
966 | else if (
|
---|
967 | (&tls_io_instance->pKey != NULL) && tls_io_instance->x509_private_key != NULL &&
|
---|
968 | (OptionHandler_AddOption(result, SU_OPTION_X509_PRIVATE_KEY, tls_io_instance->x509_private_key) != OPTIONHANDLER_OK)
|
---|
969 | )
|
---|
970 | {
|
---|
971 | LogError("unable to save x509privatekey option");
|
---|
972 | OptionHandler_Destroy(result);
|
---|
973 | result = NULL;
|
---|
974 | }
|
---|
975 | else
|
---|
976 | {
|
---|
977 | /*all is fine, all interesting options have been saved*/
|
---|
978 | /*return as is*/
|
---|
979 | }
|
---|
980 | }
|
---|
981 | }
|
---|
982 | return result;
|
---|
983 | }
|
---|
984 |
|
---|
985 | static const IO_INTERFACE_DESCRIPTION tlsio_mbedtls_interface_description =
|
---|
986 | {
|
---|
987 | tlsio_mbedtls_retrieveoptions,
|
---|
988 | tlsio_mbedtls_create,
|
---|
989 | tlsio_mbedtls_destroy,
|
---|
990 | tlsio_mbedtls_open,
|
---|
991 | tlsio_mbedtls_close,
|
---|
992 | tlsio_mbedtls_send,
|
---|
993 | tlsio_mbedtls_dowork,
|
---|
994 | tlsio_mbedtls_setoption};
|
---|
995 |
|
---|
996 | const IO_INTERFACE_DESCRIPTION *tlsio_mbedtls_get_interface_description(void)
|
---|
997 | {
|
---|
998 | return &tlsio_mbedtls_interface_description;
|
---|
999 | }
|
---|