1 | /*
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2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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3 | *
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4 | * Licensed under the OpenSSL license (the "License"). You may not use
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5 | * this file except in compliance with the License. You can obtain a copy
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6 | * in the file LICENSE in the source distribution or at
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7 | * https://www.openssl.org/source/license.html
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8 | */
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9 |
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10 | #include <stdio.h>
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11 | #include <stdlib.h>
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12 | #include <string.h>
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13 | #include <limits.h>
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14 | #include "apps.h"
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15 | #include <openssl/bio.h>
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16 | #include <openssl/err.h>
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17 | #include <openssl/evp.h>
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18 | #include <openssl/objects.h>
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19 | #include <openssl/x509.h>
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20 | #include <openssl/rand.h>
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21 | #include <openssl/pem.h>
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22 | #ifndef OPENSSL_NO_COMP
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23 | # include <openssl/comp.h>
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24 | #endif
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25 | #include <ctype.h>
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26 |
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27 | #undef SIZE
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28 | #undef BSIZE
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29 | #define SIZE (512)
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30 | #define BSIZE (8*1024)
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31 |
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32 | static int set_hex(char *in, unsigned char *out, int size);
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33 | static void show_ciphers(const OBJ_NAME *name, void *bio_);
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34 |
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35 | typedef enum OPTION_choice {
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36 | OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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37 | OPT_LIST,
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38 | OPT_E, OPT_IN, OPT_OUT, OPT_PASS, OPT_ENGINE, OPT_D, OPT_P, OPT_V,
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39 | OPT_NOPAD, OPT_SALT, OPT_NOSALT, OPT_DEBUG, OPT_UPPER_P, OPT_UPPER_A,
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40 | OPT_A, OPT_Z, OPT_BUFSIZE, OPT_K, OPT_KFILE, OPT_UPPER_K, OPT_NONE,
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41 | OPT_UPPER_S, OPT_IV, OPT_MD, OPT_CIPHER
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42 | } OPTION_CHOICE;
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43 |
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44 | OPTIONS enc_options[] = {
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45 | {"help", OPT_HELP, '-', "Display this summary"},
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46 | {"ciphers", OPT_LIST, '-', "List ciphers"},
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47 | {"in", OPT_IN, '<', "Input file"},
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48 | {"out", OPT_OUT, '>', "Output file"},
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49 | {"pass", OPT_PASS, 's', "Passphrase source"},
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50 | {"e", OPT_E, '-', "Encrypt"},
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51 | {"d", OPT_D, '-', "Decrypt"},
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52 | {"p", OPT_P, '-', "Print the iv/key"},
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53 | {"P", OPT_UPPER_P, '-', "Print the iv/key and exit"},
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54 | {"v", OPT_V, '-', "Verbose output"},
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55 | {"nopad", OPT_NOPAD, '-', "Disable standard block padding"},
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56 | {"salt", OPT_SALT, '-', "Use salt in the KDF (default)"},
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57 | {"nosalt", OPT_NOSALT, '-', "Do not use salt in the KDF"},
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58 | {"debug", OPT_DEBUG, '-', "Print debug info"},
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59 | {"a", OPT_A, '-', "Base64 encode/decode, depending on encryption flag"},
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60 | {"base64", OPT_A, '-', "Same as option -a"},
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61 | {"A", OPT_UPPER_A, '-',
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62 | "Used with -[base64|a] to specify base64 buffer as a single line"},
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63 | {"bufsize", OPT_BUFSIZE, 's', "Buffer size"},
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64 | {"k", OPT_K, 's', "Passphrase"},
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65 | {"kfile", OPT_KFILE, '<', "Read passphrase from file"},
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66 | {"K", OPT_UPPER_K, 's', "Raw key, in hex"},
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67 | {"S", OPT_UPPER_S, 's', "Salt, in hex"},
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68 | {"iv", OPT_IV, 's', "IV in hex"},
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69 | {"md", OPT_MD, 's', "Use specified digest to create a key from the passphrase"},
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70 | {"none", OPT_NONE, '-', "Don't encrypt"},
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71 | {"", OPT_CIPHER, '-', "Any supported cipher"},
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72 | #ifdef ZLIB
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73 | {"z", OPT_Z, '-', "Use zlib as the 'encryption'"},
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74 | #endif
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75 | #ifndef OPENSSL_NO_ENGINE
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76 | {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
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77 | #endif
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78 | {NULL}
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79 | };
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80 |
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81 | int enc_main(int argc, char **argv)
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82 | {
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83 | static char buf[128];
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84 | static const char magic[] = "Salted__";
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85 | ENGINE *e = NULL;
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86 | BIO *in = NULL, *out = NULL, *b64 = NULL, *benc = NULL, *rbio =
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87 | NULL, *wbio = NULL;
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88 | EVP_CIPHER_CTX *ctx = NULL;
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89 | const EVP_CIPHER *cipher = NULL, *c;
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90 | const EVP_MD *dgst = NULL;
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91 | char *hkey = NULL, *hiv = NULL, *hsalt = NULL, *p;
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92 | char *infile = NULL, *outfile = NULL, *prog;
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93 | char *str = NULL, *passarg = NULL, *pass = NULL, *strbuf = NULL;
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94 | char mbuf[sizeof magic - 1];
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95 | OPTION_CHOICE o;
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96 | int bsize = BSIZE, verbose = 0, debug = 0, olb64 = 0, nosalt = 0;
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97 | int enc = 1, printkey = 0, i, k;
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98 | int base64 = 0, informat = FORMAT_BINARY, outformat = FORMAT_BINARY;
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99 | int ret = 1, inl, nopad = 0;
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100 | unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
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101 | unsigned char *buff = NULL, salt[PKCS5_SALT_LEN];
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102 | long n;
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103 | #ifdef ZLIB
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104 | int do_zlib = 0;
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105 | BIO *bzl = NULL;
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106 | #endif
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107 |
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108 | /* first check the program name */
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109 | prog = opt_progname(argv[0]);
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110 | if (strcmp(prog, "base64") == 0)
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111 | base64 = 1;
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112 | #ifdef ZLIB
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113 | else if (strcmp(prog, "zlib") == 0)
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114 | do_zlib = 1;
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115 | #endif
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116 | else {
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117 | cipher = EVP_get_cipherbyname(prog);
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118 | if (cipher == NULL && strcmp(prog, "enc") != 0) {
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119 | BIO_printf(bio_err, "%s is not a known cipher\n", prog);
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120 | goto end;
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121 | }
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122 | }
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123 |
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124 | prog = opt_init(argc, argv, enc_options);
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125 | while ((o = opt_next()) != OPT_EOF) {
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126 | switch (o) {
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127 | case OPT_EOF:
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128 | case OPT_ERR:
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129 | opthelp:
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130 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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131 | goto end;
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132 | case OPT_HELP:
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133 | opt_help(enc_options);
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134 | ret = 0;
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135 | goto end;
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136 | case OPT_LIST:
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137 | BIO_printf(bio_err, "Supported ciphers:\n");
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138 | OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
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139 | show_ciphers, bio_err);
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140 | BIO_printf(bio_err, "\n");
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141 | goto end;
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142 | case OPT_E:
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143 | enc = 1;
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144 | break;
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145 | case OPT_IN:
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146 | infile = opt_arg();
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147 | break;
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148 | case OPT_OUT:
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149 | outfile = opt_arg();
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150 | break;
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151 | case OPT_PASS:
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152 | passarg = opt_arg();
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153 | break;
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154 | case OPT_ENGINE:
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155 | e = setup_engine(opt_arg(), 0);
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156 | break;
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157 | case OPT_D:
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158 | enc = 0;
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159 | break;
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160 | case OPT_P:
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161 | printkey = 1;
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162 | break;
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163 | case OPT_V:
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164 | verbose = 1;
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165 | break;
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166 | case OPT_NOPAD:
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167 | nopad = 1;
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168 | break;
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169 | case OPT_SALT:
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170 | nosalt = 0;
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171 | break;
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172 | case OPT_NOSALT:
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173 | nosalt = 1;
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174 | break;
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175 | case OPT_DEBUG:
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176 | debug = 1;
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177 | break;
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178 | case OPT_UPPER_P:
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179 | printkey = 2;
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180 | break;
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181 | case OPT_UPPER_A:
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182 | olb64 = 1;
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183 | break;
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184 | case OPT_A:
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185 | base64 = 1;
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186 | break;
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187 | case OPT_Z:
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188 | #ifdef ZLIB
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189 | do_zlib = 1;
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190 | #endif
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191 | break;
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192 | case OPT_BUFSIZE:
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193 | p = opt_arg();
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194 | i = (int)strlen(p) - 1;
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195 | k = i >= 1 && p[i] == 'k';
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196 | if (k)
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197 | p[i] = '\0';
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198 | if (!opt_long(opt_arg(), &n)
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199 | || n < 0 || (k && n >= LONG_MAX / 1024))
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200 | goto opthelp;
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201 | if (k)
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202 | n *= 1024;
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203 | bsize = (int)n;
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204 | break;
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205 | case OPT_K:
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206 | str = opt_arg();
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207 | break;
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208 | case OPT_KFILE:
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209 | in = bio_open_default(opt_arg(), 'r', FORMAT_TEXT);
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210 | if (in == NULL)
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211 | goto opthelp;
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212 | i = BIO_gets(in, buf, sizeof buf);
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213 | BIO_free(in);
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214 | in = NULL;
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215 | if (i <= 0) {
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216 | BIO_printf(bio_err,
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217 | "%s Can't read key from %s\n", prog, opt_arg());
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218 | goto opthelp;
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219 | }
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220 | while (--i > 0 && (buf[i] == '\r' || buf[i] == '\n'))
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221 | buf[i] = '\0';
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222 | if (i <= 0) {
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223 | BIO_printf(bio_err, "%s: zero length password\n", prog);
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224 | goto opthelp;
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225 | }
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226 | str = buf;
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227 | break;
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228 | case OPT_UPPER_K:
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229 | hkey = opt_arg();
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230 | break;
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231 | case OPT_UPPER_S:
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232 | hsalt = opt_arg();
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233 | break;
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234 | case OPT_IV:
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235 | hiv = opt_arg();
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236 | break;
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237 | case OPT_MD:
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238 | if (!opt_md(opt_arg(), &dgst))
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239 | goto opthelp;
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240 | break;
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241 | case OPT_CIPHER:
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242 | if (!opt_cipher(opt_unknown(), &c))
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243 | goto opthelp;
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244 | cipher = c;
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245 | break;
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246 | case OPT_NONE:
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247 | cipher = NULL;
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248 | break;
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249 | }
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250 | }
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251 |
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252 | if (cipher && EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) {
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253 | BIO_printf(bio_err, "%s: AEAD ciphers not supported\n", prog);
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254 | goto end;
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255 | }
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256 |
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257 | if (cipher && (EVP_CIPHER_mode(cipher) == EVP_CIPH_XTS_MODE)) {
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258 | BIO_printf(bio_err, "%s XTS ciphers not supported\n", prog);
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259 | goto end;
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260 | }
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261 |
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262 | if (dgst == NULL)
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263 | dgst = EVP_sha256();
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264 |
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265 | /* It must be large enough for a base64 encoded line */
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266 | if (base64 && bsize < 80)
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267 | bsize = 80;
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268 | if (verbose)
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269 | BIO_printf(bio_err, "bufsize=%d\n", bsize);
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270 |
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271 | #ifdef ZLIB
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272 | if (!do_zlib)
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273 | #endif
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274 | if (base64) {
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275 | if (enc)
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276 | outformat = FORMAT_BASE64;
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277 | else
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278 | informat = FORMAT_BASE64;
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279 | }
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280 |
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281 | strbuf = app_malloc(SIZE, "strbuf");
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282 | buff = app_malloc(EVP_ENCODE_LENGTH(bsize), "evp buffer");
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283 |
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284 | if (infile == NULL) {
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285 | unbuffer(stdin);
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286 | in = dup_bio_in(informat);
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287 | } else
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288 | in = bio_open_default(infile, 'r', informat);
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289 | if (in == NULL)
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290 | goto end;
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291 |
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292 | if (!str && passarg) {
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293 | if (!app_passwd(passarg, NULL, &pass, NULL)) {
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294 | BIO_printf(bio_err, "Error getting password\n");
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295 | goto end;
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296 | }
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297 | str = pass;
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298 | }
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299 |
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300 | if ((str == NULL) && (cipher != NULL) && (hkey == NULL)) {
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301 | if (1) {
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302 | #ifndef OPENSSL_NO_UI
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303 | for (;;) {
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304 | char prompt[200];
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305 |
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306 | BIO_snprintf(prompt, sizeof prompt, "enter %s %s password:",
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307 | OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
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308 | (enc) ? "encryption" : "decryption");
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309 | strbuf[0] = '\0';
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310 | i = EVP_read_pw_string((char *)strbuf, SIZE, prompt, enc);
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311 | if (i == 0) {
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312 | if (strbuf[0] == '\0') {
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313 | ret = 1;
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314 | goto end;
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315 | }
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316 | str = strbuf;
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317 | break;
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318 | }
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319 | if (i < 0) {
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320 | BIO_printf(bio_err, "bad password read\n");
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321 | goto end;
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322 | }
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323 | }
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324 | } else {
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325 | #endif
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326 | BIO_printf(bio_err, "password required\n");
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327 | goto end;
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328 | }
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329 | }
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330 |
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331 | out = bio_open_default(outfile, 'w', outformat);
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332 | if (out == NULL)
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333 | goto end;
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334 |
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335 | if (debug) {
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336 | BIO_set_callback(in, BIO_debug_callback);
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337 | BIO_set_callback(out, BIO_debug_callback);
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338 | BIO_set_callback_arg(in, (char *)bio_err);
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339 | BIO_set_callback_arg(out, (char *)bio_err);
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340 | }
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341 |
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342 | rbio = in;
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343 | wbio = out;
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344 |
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345 | #ifdef ZLIB
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346 | if (do_zlib) {
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347 | if ((bzl = BIO_new(BIO_f_zlib())) == NULL)
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348 | goto end;
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349 | if (debug) {
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350 | BIO_set_callback(bzl, BIO_debug_callback);
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351 | BIO_set_callback_arg(bzl, (char *)bio_err);
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352 | }
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353 | if (enc)
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354 | wbio = BIO_push(bzl, wbio);
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355 | else
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356 | rbio = BIO_push(bzl, rbio);
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357 | }
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358 | #endif
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359 |
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360 | if (base64) {
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361 | if ((b64 = BIO_new(BIO_f_base64())) == NULL)
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362 | goto end;
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363 | if (debug) {
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364 | BIO_set_callback(b64, BIO_debug_callback);
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365 | BIO_set_callback_arg(b64, (char *)bio_err);
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366 | }
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367 | if (olb64)
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368 | BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
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369 | if (enc)
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370 | wbio = BIO_push(b64, wbio);
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371 | else
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372 | rbio = BIO_push(b64, rbio);
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373 | }
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374 |
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375 | if (cipher != NULL) {
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376 | /*
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377 | * Note that str is NULL if a key was passed on the command line, so
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378 | * we get no salt in that case. Is this a bug?
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379 | */
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380 | if (str != NULL) {
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381 | /*
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382 | * Salt handling: if encrypting generate a salt and write to
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383 | * output BIO. If decrypting read salt from input BIO.
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384 | */
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385 | unsigned char *sptr;
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386 | size_t str_len = strlen(str);
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387 |
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388 | if (nosalt)
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389 | sptr = NULL;
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390 | else {
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391 | if (enc) {
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392 | if (hsalt) {
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393 | if (!set_hex(hsalt, salt, sizeof salt)) {
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394 | BIO_printf(bio_err, "invalid hex salt value\n");
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395 | goto end;
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396 | }
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397 | } else if (RAND_bytes(salt, sizeof salt) <= 0)
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398 | goto end;
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399 | /*
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400 | * If -P option then don't bother writing
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401 | */
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402 | if ((printkey != 2)
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403 | && (BIO_write(wbio, magic,
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404 | sizeof magic - 1) != sizeof magic - 1
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405 | || BIO_write(wbio,
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406 | (char *)salt,
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407 | sizeof salt) != sizeof salt)) {
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408 | BIO_printf(bio_err, "error writing output file\n");
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409 | goto end;
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410 | }
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411 | } else if (BIO_read(rbio, mbuf, sizeof mbuf) != sizeof mbuf
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412 | || BIO_read(rbio,
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413 | (unsigned char *)salt,
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414 | sizeof salt) != sizeof salt) {
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415 | BIO_printf(bio_err, "error reading input file\n");
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416 | goto end;
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417 | } else if (memcmp(mbuf, magic, sizeof magic - 1)) {
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418 | BIO_printf(bio_err, "bad magic number\n");
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419 | goto end;
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420 | }
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421 |
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422 | sptr = salt;
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423 | }
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424 |
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425 | if (!EVP_BytesToKey(cipher, dgst, sptr,
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426 | (unsigned char *)str,
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427 | str_len, 1, key, iv)) {
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428 | BIO_printf(bio_err, "EVP_BytesToKey failed\n");
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429 | goto end;
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430 | }
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431 | /*
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432 | * zero the complete buffer or the string passed from the command
|
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433 | * line bug picked up by Larry J. Hughes Jr. <hughes@indiana.edu>
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434 | */
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435 | if (str == strbuf)
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436 | OPENSSL_cleanse(str, SIZE);
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437 | else
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438 | OPENSSL_cleanse(str, str_len);
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439 | }
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440 | if (hiv != NULL) {
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441 | int siz = EVP_CIPHER_iv_length(cipher);
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442 | if (siz == 0) {
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443 | BIO_printf(bio_err, "warning: iv not use by this cipher\n");
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444 | } else if (!set_hex(hiv, iv, sizeof iv)) {
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445 | BIO_printf(bio_err, "invalid hex iv value\n");
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446 | goto end;
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447 | }
|
---|
448 | }
|
---|
449 | if ((hiv == NULL) && (str == NULL)
|
---|
450 | && EVP_CIPHER_iv_length(cipher) != 0) {
|
---|
451 | /*
|
---|
452 | * No IV was explicitly set and no IV was generated during
|
---|
453 | * EVP_BytesToKey. Hence the IV is undefined, making correct
|
---|
454 | * decryption impossible.
|
---|
455 | */
|
---|
456 | BIO_printf(bio_err, "iv undefined\n");
|
---|
457 | goto end;
|
---|
458 | }
|
---|
459 | if ((hkey != NULL) && !set_hex(hkey, key, EVP_CIPHER_key_length(cipher))) {
|
---|
460 | BIO_printf(bio_err, "invalid hex key value\n");
|
---|
461 | goto end;
|
---|
462 | }
|
---|
463 |
|
---|
464 | if ((benc = BIO_new(BIO_f_cipher())) == NULL)
|
---|
465 | goto end;
|
---|
466 |
|
---|
467 | /*
|
---|
468 | * Since we may be changing parameters work on the encryption context
|
---|
469 | * rather than calling BIO_set_cipher().
|
---|
470 | */
|
---|
471 |
|
---|
472 | BIO_get_cipher_ctx(benc, &ctx);
|
---|
473 |
|
---|
474 | if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc)) {
|
---|
475 | BIO_printf(bio_err, "Error setting cipher %s\n",
|
---|
476 | EVP_CIPHER_name(cipher));
|
---|
477 | ERR_print_errors(bio_err);
|
---|
478 | goto end;
|
---|
479 | }
|
---|
480 |
|
---|
481 | if (nopad)
|
---|
482 | EVP_CIPHER_CTX_set_padding(ctx, 0);
|
---|
483 |
|
---|
484 | if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc)) {
|
---|
485 | BIO_printf(bio_err, "Error setting cipher %s\n",
|
---|
486 | EVP_CIPHER_name(cipher));
|
---|
487 | ERR_print_errors(bio_err);
|
---|
488 | goto end;
|
---|
489 | }
|
---|
490 |
|
---|
491 | if (debug) {
|
---|
492 | BIO_set_callback(benc, BIO_debug_callback);
|
---|
493 | BIO_set_callback_arg(benc, (char *)bio_err);
|
---|
494 | }
|
---|
495 |
|
---|
496 | if (printkey) {
|
---|
497 | if (!nosalt) {
|
---|
498 | printf("salt=");
|
---|
499 | for (i = 0; i < (int)sizeof(salt); i++)
|
---|
500 | printf("%02X", salt[i]);
|
---|
501 | printf("\n");
|
---|
502 | }
|
---|
503 | if (EVP_CIPHER_key_length(cipher) > 0) {
|
---|
504 | printf("key=");
|
---|
505 | for (i = 0; i < EVP_CIPHER_key_length(cipher); i++)
|
---|
506 | printf("%02X", key[i]);
|
---|
507 | printf("\n");
|
---|
508 | }
|
---|
509 | if (EVP_CIPHER_iv_length(cipher) > 0) {
|
---|
510 | printf("iv =");
|
---|
511 | for (i = 0; i < EVP_CIPHER_iv_length(cipher); i++)
|
---|
512 | printf("%02X", iv[i]);
|
---|
513 | printf("\n");
|
---|
514 | }
|
---|
515 | if (printkey == 2) {
|
---|
516 | ret = 0;
|
---|
517 | goto end;
|
---|
518 | }
|
---|
519 | }
|
---|
520 | }
|
---|
521 |
|
---|
522 | /* Only encrypt/decrypt as we write the file */
|
---|
523 | if (benc != NULL)
|
---|
524 | wbio = BIO_push(benc, wbio);
|
---|
525 |
|
---|
526 | for (;;) {
|
---|
527 | inl = BIO_read(rbio, (char *)buff, bsize);
|
---|
528 | if (inl <= 0)
|
---|
529 | break;
|
---|
530 | if (BIO_write(wbio, (char *)buff, inl) != inl) {
|
---|
531 | BIO_printf(bio_err, "error writing output file\n");
|
---|
532 | goto end;
|
---|
533 | }
|
---|
534 | }
|
---|
535 | if (!BIO_flush(wbio)) {
|
---|
536 | BIO_printf(bio_err, "bad decrypt\n");
|
---|
537 | goto end;
|
---|
538 | }
|
---|
539 |
|
---|
540 | ret = 0;
|
---|
541 | if (verbose) {
|
---|
542 | BIO_printf(bio_err, "bytes read :%8"PRIu64"\n", BIO_number_read(in));
|
---|
543 | BIO_printf(bio_err, "bytes written:%8"PRIu64"\n", BIO_number_written(out));
|
---|
544 | }
|
---|
545 | end:
|
---|
546 | ERR_print_errors(bio_err);
|
---|
547 | OPENSSL_free(strbuf);
|
---|
548 | OPENSSL_free(buff);
|
---|
549 | BIO_free(in);
|
---|
550 | BIO_free_all(out);
|
---|
551 | BIO_free(benc);
|
---|
552 | BIO_free(b64);
|
---|
553 | #ifdef ZLIB
|
---|
554 | BIO_free(bzl);
|
---|
555 | #endif
|
---|
556 | release_engine(e);
|
---|
557 | OPENSSL_free(pass);
|
---|
558 | return (ret);
|
---|
559 | }
|
---|
560 |
|
---|
561 | static void show_ciphers(const OBJ_NAME *name, void *bio_)
|
---|
562 | {
|
---|
563 | BIO *bio = bio_;
|
---|
564 | static int n;
|
---|
565 |
|
---|
566 | if (!islower((unsigned char)*name->name))
|
---|
567 | return;
|
---|
568 |
|
---|
569 | BIO_printf(bio, "-%-25s", name->name);
|
---|
570 | if (++n == 3) {
|
---|
571 | BIO_printf(bio, "\n");
|
---|
572 | n = 0;
|
---|
573 | } else
|
---|
574 | BIO_printf(bio, " ");
|
---|
575 | }
|
---|
576 |
|
---|
577 | static int set_hex(char *in, unsigned char *out, int size)
|
---|
578 | {
|
---|
579 | int i, n;
|
---|
580 | unsigned char j;
|
---|
581 |
|
---|
582 | n = strlen(in);
|
---|
583 | if (n > (size * 2)) {
|
---|
584 | BIO_printf(bio_err, "hex string is too long\n");
|
---|
585 | return (0);
|
---|
586 | }
|
---|
587 | memset(out, 0, size);
|
---|
588 | for (i = 0; i < n; i++) {
|
---|
589 | j = (unsigned char)*in;
|
---|
590 | *(in++) = '\0';
|
---|
591 | if (j == 0)
|
---|
592 | break;
|
---|
593 | if (!isxdigit(j)) {
|
---|
594 | BIO_printf(bio_err, "non-hex digit\n");
|
---|
595 | return (0);
|
---|
596 | }
|
---|
597 | j = (unsigned char)OPENSSL_hexchar2int(j);
|
---|
598 | if (i & 1)
|
---|
599 | out[i / 2] |= j;
|
---|
600 | else
|
---|
601 | out[i / 2] = (j << 4);
|
---|
602 | }
|
---|
603 | return (1);
|
---|
604 | }
|
---|