1 | /* apps/enc.c */ |
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2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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3 | * All rights reserved. |
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4 | * |
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5 | * This package is an SSL implementation written |
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6 | * by Eric Young (eay@cryptsoft.com). |
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7 | * The implementation was written so as to conform with Netscapes SSL. |
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8 | * |
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9 | * This library is free for commercial and non-commercial use as long as |
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10 | * the following conditions are aheared to. The following conditions |
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11 | * apply to all code found in this distribution, be it the RC4, RSA, |
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12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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13 | * included with this distribution is covered by the same copyright terms |
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14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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15 | * |
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16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
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17 | * the code are not to be removed. |
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18 | * If this package is used in a product, Eric Young should be given attribution |
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19 | * as the author of the parts of the library used. |
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20 | * This can be in the form of a textual message at program startup or |
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21 | * in documentation (online or textual) provided with the package. |
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22 | * |
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23 | * Redistribution and use in source and binary forms, with or without |
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24 | * modification, are permitted provided that the following conditions |
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25 | * are met: |
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26 | * 1. Redistributions of source code must retain the copyright |
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27 | * notice, this list of conditions and the following disclaimer. |
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28 | * 2. Redistributions in binary form must reproduce the above copyright |
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29 | * notice, this list of conditions and the following disclaimer in the |
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30 | * documentation and/or other materials provided with the distribution. |
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31 | * 3. All advertising materials mentioning features or use of this software |
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32 | * must display the following acknowledgement: |
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33 | * "This product includes cryptographic software written by |
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34 | * Eric Young (eay@cryptsoft.com)" |
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35 | * The word 'cryptographic' can be left out if the rouines from the library |
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36 | * being used are not cryptographic related :-). |
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37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
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38 | * the apps directory (application code) you must include an acknowledgement: |
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39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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40 | * |
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41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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51 | * SUCH DAMAGE. |
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52 | * |
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53 | * The licence and distribution terms for any publically available version or |
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54 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
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55 | * copied and put under another distribution licence |
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56 | * [including the GNU Public Licence.] |
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57 | */ |
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58 | |
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59 | #include <stdio.h> |
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60 | #include <stdlib.h> |
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61 | #include <string.h> |
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62 | #include "apps.h" |
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63 | #include <openssl/bio.h> |
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64 | #include <openssl/err.h> |
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65 | #include <openssl/evp.h> |
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66 | #include <openssl/objects.h> |
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67 | #include <openssl/x509.h> |
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68 | #include <openssl/rand.h> |
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69 | #include <openssl/pem.h> |
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70 | #include <ctype.h> |
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71 | |
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72 | int set_hex(char *in,unsigned char *out,int size); |
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73 | #undef SIZE |
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74 | #undef BSIZE |
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75 | #undef PROG |
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76 | |
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77 | #define SIZE (512) |
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78 | #define BSIZE (8*1024) |
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79 | #define PROG enc_main |
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80 | |
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81 | static void show_ciphers(const OBJ_NAME *name,void *bio_) |
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82 | { |
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83 | BIO *bio=bio_; |
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84 | static int n; |
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85 | |
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86 | if(!islower((unsigned char)*name->name)) |
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87 | return; |
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88 | |
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89 | BIO_printf(bio,"-%-25s",name->name); |
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90 | if(++n == 3) |
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91 | { |
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92 | BIO_printf(bio,"\n"); |
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93 | n=0; |
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94 | } |
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95 | else |
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96 | BIO_printf(bio," "); |
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97 | } |
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98 | |
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99 | int MAIN(int, char **); |
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100 | |
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101 | int MAIN(int argc, char **argv) |
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102 | { |
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103 | ENGINE *e = NULL; |
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104 | static const char magic[]="Salted__"; |
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105 | char mbuf[sizeof magic-1]; |
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106 | char *strbuf=NULL; |
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107 | unsigned char *buff=NULL,*bufsize=NULL; |
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108 | int bsize=BSIZE,verbose=0; |
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109 | int ret=1,inl; |
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110 | int nopad = 0; |
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111 | unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH]; |
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112 | unsigned char salt[PKCS5_SALT_LEN]; |
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113 | char *str=NULL, *passarg = NULL, *pass = NULL; |
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114 | char *hkey=NULL,*hiv=NULL,*hsalt = NULL; |
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115 | int enc=1,printkey=0,i,base64=0; |
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116 | int debug=0,olb64=0,nosalt=0; |
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117 | const EVP_CIPHER *cipher=NULL,*c; |
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118 | char *inf=NULL,*outf=NULL; |
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119 | BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL; |
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120 | #define PROG_NAME_SIZE 39 |
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121 | char pname[PROG_NAME_SIZE+1]; |
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122 | char *engine = NULL; |
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123 | |
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124 | apps_startup(); |
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125 | |
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126 | if (bio_err == NULL) |
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127 | if ((bio_err=BIO_new(BIO_s_file())) != NULL) |
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128 | BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); |
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129 | |
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130 | if (!load_config(bio_err, NULL)) |
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131 | goto end; |
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132 | |
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133 | /* first check the program name */ |
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134 | program_name(argv[0],pname,sizeof pname); |
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135 | if (strcmp(pname,"base64") == 0) |
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136 | base64=1; |
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137 | |
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138 | cipher=EVP_get_cipherbyname(pname); |
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139 | if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0)) |
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140 | { |
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141 | BIO_printf(bio_err,"%s is an unknown cipher\n",pname); |
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142 | goto bad; |
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143 | } |
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144 | |
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145 | argc--; |
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146 | argv++; |
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147 | while (argc >= 1) |
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148 | { |
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149 | if (strcmp(*argv,"-e") == 0) |
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150 | enc=1; |
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151 | else if (strcmp(*argv,"-in") == 0) |
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152 | { |
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153 | if (--argc < 1) goto bad; |
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154 | inf= *(++argv); |
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155 | } |
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156 | else if (strcmp(*argv,"-out") == 0) |
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157 | { |
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158 | if (--argc < 1) goto bad; |
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159 | outf= *(++argv); |
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160 | } |
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161 | else if (strcmp(*argv,"-pass") == 0) |
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162 | { |
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163 | if (--argc < 1) goto bad; |
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164 | passarg= *(++argv); |
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165 | } |
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166 | else if (strcmp(*argv,"-engine") == 0) |
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167 | { |
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168 | if (--argc < 1) goto bad; |
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169 | engine= *(++argv); |
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170 | } |
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171 | else if (strcmp(*argv,"-d") == 0) |
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172 | enc=0; |
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173 | else if (strcmp(*argv,"-p") == 0) |
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174 | printkey=1; |
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175 | else if (strcmp(*argv,"-v") == 0) |
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176 | verbose=1; |
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177 | else if (strcmp(*argv,"-nopad") == 0) |
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178 | nopad=1; |
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179 | else if (strcmp(*argv,"-salt") == 0) |
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180 | nosalt=0; |
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181 | else if (strcmp(*argv,"-nosalt") == 0) |
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182 | nosalt=1; |
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183 | else if (strcmp(*argv,"-debug") == 0) |
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184 | debug=1; |
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185 | else if (strcmp(*argv,"-P") == 0) |
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186 | printkey=2; |
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187 | else if (strcmp(*argv,"-A") == 0) |
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188 | olb64=1; |
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189 | else if (strcmp(*argv,"-a") == 0) |
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190 | base64=1; |
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191 | else if (strcmp(*argv,"-base64") == 0) |
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192 | base64=1; |
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193 | else if (strcmp(*argv,"-bufsize") == 0) |
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194 | { |
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195 | if (--argc < 1) goto bad; |
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196 | bufsize=(unsigned char *)*(++argv); |
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197 | } |
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198 | else if (strcmp(*argv,"-k") == 0) |
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199 | { |
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200 | if (--argc < 1) goto bad; |
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201 | str= *(++argv); |
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202 | } |
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203 | else if (strcmp(*argv,"-kfile") == 0) |
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204 | { |
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205 | static char buf[128]; |
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206 | FILE *infile; |
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207 | char *file; |
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208 | |
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209 | if (--argc < 1) goto bad; |
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210 | file= *(++argv); |
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211 | infile=fopen(file,"r"); |
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212 | if (infile == NULL) |
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213 | { |
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214 | BIO_printf(bio_err,"unable to read key from '%s'\n", |
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215 | file); |
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216 | goto bad; |
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217 | } |
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218 | buf[0]='\0'; |
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219 | fgets(buf,sizeof buf,infile); |
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220 | fclose(infile); |
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221 | i=strlen(buf); |
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222 | if ((i > 0) && |
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223 | ((buf[i-1] == '\n') || (buf[i-1] == '\r'))) |
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224 | buf[--i]='\0'; |
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225 | if ((i > 0) && |
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226 | ((buf[i-1] == '\n') || (buf[i-1] == '\r'))) |
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227 | buf[--i]='\0'; |
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228 | if (i < 1) |
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229 | { |
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230 | BIO_printf(bio_err,"zero length password\n"); |
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231 | goto bad; |
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232 | } |
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233 | str=buf; |
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234 | } |
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235 | else if (strcmp(*argv,"-K") == 0) |
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236 | { |
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237 | if (--argc < 1) goto bad; |
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238 | hkey= *(++argv); |
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239 | } |
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240 | else if (strcmp(*argv,"-S") == 0) |
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241 | { |
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242 | if (--argc < 1) goto bad; |
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243 | hsalt= *(++argv); |
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244 | } |
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245 | else if (strcmp(*argv,"-iv") == 0) |
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246 | { |
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247 | if (--argc < 1) goto bad; |
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248 | hiv= *(++argv); |
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249 | } |
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250 | else if ((argv[0][0] == '-') && |
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251 | ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL)) |
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252 | { |
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253 | cipher=c; |
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254 | } |
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255 | else if (strcmp(*argv,"-none") == 0) |
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256 | cipher=NULL; |
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257 | else |
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258 | { |
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259 | BIO_printf(bio_err,"unknown option '%s'\n",*argv); |
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260 | bad: |
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261 | BIO_printf(bio_err,"options are\n"); |
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262 | BIO_printf(bio_err,"%-14s input file\n","-in <file>"); |
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263 | BIO_printf(bio_err,"%-14s output file\n","-out <file>"); |
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264 | BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>"); |
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265 | BIO_printf(bio_err,"%-14s encrypt\n","-e"); |
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266 | BIO_printf(bio_err,"%-14s decrypt\n","-d"); |
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267 | BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64"); |
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268 | BIO_printf(bio_err,"%-14s key is the next argument\n","-k"); |
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269 | BIO_printf(bio_err,"%-14s key is the first line of the file argument\n","-kfile"); |
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270 | BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv"); |
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271 | BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]"); |
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272 | BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>"); |
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273 | BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e"); |
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274 | |
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275 | BIO_printf(bio_err,"Cipher Types\n"); |
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276 | OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, |
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277 | show_ciphers, |
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278 | bio_err); |
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279 | BIO_printf(bio_err,"\n"); |
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280 | |
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281 | goto end; |
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282 | } |
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283 | argc--; |
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284 | argv++; |
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285 | } |
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286 | |
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287 | e = setup_engine(bio_err, engine, 0); |
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288 | |
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289 | if (bufsize != NULL) |
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290 | { |
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291 | unsigned long n; |
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292 | |
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293 | for (n=0; *bufsize; bufsize++) |
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294 | { |
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295 | i= *bufsize; |
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296 | if ((i <= '9') && (i >= '0')) |
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297 | n=n*10+i-'0'; |
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298 | else if (i == 'k') |
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299 | { |
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300 | n*=1024; |
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301 | bufsize++; |
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302 | break; |
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303 | } |
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304 | } |
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305 | if (*bufsize != '\0') |
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306 | { |
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307 | BIO_printf(bio_err,"invalid 'bufsize' specified.\n"); |
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308 | goto end; |
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309 | } |
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310 | |
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311 | /* It must be large enough for a base64 encoded line */ |
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312 | if (n < 80) n=80; |
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313 | |
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314 | bsize=(int)n; |
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315 | if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize); |
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316 | } |
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317 | |
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318 | strbuf=OPENSSL_malloc(SIZE); |
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319 | buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize)); |
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320 | if ((buff == NULL) || (strbuf == NULL)) |
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321 | { |
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322 | BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize)); |
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323 | goto end; |
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324 | } |
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325 | |
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326 | in=BIO_new(BIO_s_file()); |
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327 | out=BIO_new(BIO_s_file()); |
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328 | if ((in == NULL) || (out == NULL)) |
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329 | { |
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330 | ERR_print_errors(bio_err); |
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331 | goto end; |
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332 | } |
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333 | if (debug) |
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334 | { |
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335 | BIO_set_callback(in,BIO_debug_callback); |
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336 | BIO_set_callback(out,BIO_debug_callback); |
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337 | BIO_set_callback_arg(in,bio_err); |
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338 | BIO_set_callback_arg(out,bio_err); |
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339 | } |
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340 | |
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341 | if (inf == NULL) |
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342 | BIO_set_fp(in,stdin,BIO_NOCLOSE); |
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343 | else |
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344 | { |
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345 | if (BIO_read_filename(in,inf) <= 0) |
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346 | { |
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347 | perror(inf); |
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348 | goto end; |
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349 | } |
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350 | } |
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351 | |
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352 | if(!str && passarg) { |
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353 | if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) { |
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354 | BIO_printf(bio_err, "Error getting password\n"); |
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355 | goto end; |
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356 | } |
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357 | str = pass; |
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358 | } |
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359 | |
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360 | if ((str == NULL) && (cipher != NULL) && (hkey == NULL)) |
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361 | { |
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362 | for (;;) |
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363 | { |
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364 | char buf[200]; |
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365 | |
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366 | sprintf(buf,"enter %s %s password:", |
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367 | OBJ_nid2ln(EVP_CIPHER_nid(cipher)), |
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368 | (enc)?"encryption":"decryption"); |
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369 | strbuf[0]='\0'; |
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370 | i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc); |
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371 | if (i == 0) |
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372 | { |
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373 | if (strbuf[0] == '\0') |
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374 | { |
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375 | ret=1; |
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376 | goto end; |
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377 | } |
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378 | str=strbuf; |
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379 | break; |
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380 | } |
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381 | if (i < 0) |
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382 | { |
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383 | BIO_printf(bio_err,"bad password read\n"); |
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384 | goto end; |
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385 | } |
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386 | } |
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387 | } |
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388 | |
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389 | |
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390 | if (outf == NULL) |
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391 | { |
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392 | BIO_set_fp(out,stdout,BIO_NOCLOSE); |
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393 | #ifdef OPENSSL_SYS_VMS |
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394 | { |
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395 | BIO *tmpbio = BIO_new(BIO_f_linebuffer()); |
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396 | out = BIO_push(tmpbio, out); |
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397 | } |
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398 | #endif |
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399 | } |
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400 | else |
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401 | { |
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402 | if (BIO_write_filename(out,outf) <= 0) |
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403 | { |
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404 | perror(outf); |
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405 | goto end; |
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406 | } |
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407 | } |
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408 | |
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409 | rbio=in; |
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410 | wbio=out; |
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411 | |
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412 | if (base64) |
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413 | { |
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414 | if ((b64=BIO_new(BIO_f_base64())) == NULL) |
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415 | goto end; |
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416 | if (debug) |
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417 | { |
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418 | BIO_set_callback(b64,BIO_debug_callback); |
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419 | BIO_set_callback_arg(b64,bio_err); |
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420 | } |
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421 | if (olb64) |
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422 | BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL); |
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423 | if (enc) |
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424 | wbio=BIO_push(b64,wbio); |
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425 | else |
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426 | rbio=BIO_push(b64,rbio); |
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427 | } |
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428 | |
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429 | if (cipher != NULL) |
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430 | { |
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431 | /* Note that str is NULL if a key was passed on the command |
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432 | * line, so we get no salt in that case. Is this a bug? |
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433 | */ |
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434 | if (str != NULL) |
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435 | { |
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436 | /* Salt handling: if encrypting generate a salt and |
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437 | * write to output BIO. If decrypting read salt from |
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438 | * input BIO. |
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439 | */ |
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440 | unsigned char *sptr; |
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441 | if(nosalt) sptr = NULL; |
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442 | else { |
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443 | if(enc) { |
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444 | if(hsalt) { |
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445 | if(!set_hex(hsalt,salt,sizeof salt)) { |
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446 | BIO_printf(bio_err, |
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447 | "invalid hex salt value\n"); |
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448 | goto end; |
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449 | } |
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450 | } else if (RAND_pseudo_bytes(salt, sizeof salt) < 0) |
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451 | goto end; |
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452 | /* If -P option then don't bother writing */ |
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453 | if((printkey != 2) |
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454 | && (BIO_write(wbio,magic, |
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455 | sizeof magic-1) != sizeof magic-1 |
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456 | || BIO_write(wbio, |
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457 | (char *)salt, |
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458 | sizeof salt) != sizeof salt)) { |
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459 | BIO_printf(bio_err,"error writing output file\n"); |
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460 | goto end; |
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461 | } |
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462 | } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf |
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463 | || BIO_read(rbio, |
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464 | (unsigned char *)salt, |
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465 | sizeof salt) != sizeof salt) { |
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466 | BIO_printf(bio_err,"error reading input file\n"); |
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467 | goto end; |
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468 | } else if(memcmp(mbuf,magic,sizeof magic-1)) { |
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469 | BIO_printf(bio_err,"bad magic number\n"); |
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470 | goto end; |
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471 | } |
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472 | |
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473 | sptr = salt; |
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474 | } |
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475 | |
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476 | EVP_BytesToKey(cipher,EVP_md5(),sptr, |
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477 | (unsigned char *)str, |
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478 | strlen(str),1,key,iv); |
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479 | /* zero the complete buffer or the string |
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480 | * passed from the command line |
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481 | * bug picked up by |
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482 | * Larry J. Hughes Jr. <hughes@indiana.edu> */ |
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483 | if (str == strbuf) |
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484 | OPENSSL_cleanse(str,SIZE); |
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485 | else |
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486 | OPENSSL_cleanse(str,strlen(str)); |
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487 | } |
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488 | if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv)) |
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489 | { |
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490 | BIO_printf(bio_err,"invalid hex iv value\n"); |
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491 | goto end; |
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492 | } |
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493 | if ((hiv == NULL) && (str == NULL)) |
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494 | { |
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495 | /* No IV was explicitly set and no IV was generated |
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496 | * during EVP_BytesToKey. Hence the IV is undefined, |
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497 | * making correct decryption impossible. */ |
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498 | BIO_printf(bio_err, "iv undefined\n"); |
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499 | goto end; |
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500 | } |
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501 | if ((hkey != NULL) && !set_hex(hkey,key,sizeof key)) |
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502 | { |
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503 | BIO_printf(bio_err,"invalid hex key value\n"); |
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504 | goto end; |
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505 | } |
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506 | |
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507 | if ((benc=BIO_new(BIO_f_cipher())) == NULL) |
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508 | goto end; |
---|
509 | BIO_set_cipher(benc,cipher,key,iv,enc); |
---|
510 | if (nopad) |
---|
511 | { |
---|
512 | EVP_CIPHER_CTX *ctx; |
---|
513 | BIO_get_cipher_ctx(benc, &ctx); |
---|
514 | EVP_CIPHER_CTX_set_padding(ctx, 0); |
---|
515 | } |
---|
516 | if (debug) |
---|
517 | { |
---|
518 | BIO_set_callback(benc,BIO_debug_callback); |
---|
519 | BIO_set_callback_arg(benc,bio_err); |
---|
520 | } |
---|
521 | |
---|
522 | if (printkey) |
---|
523 | { |
---|
524 | if (!nosalt) |
---|
525 | { |
---|
526 | printf("salt="); |
---|
527 | for (i=0; i<sizeof salt; i++) |
---|
528 | printf("%02X",salt[i]); |
---|
529 | printf("\n"); |
---|
530 | } |
---|
531 | if (cipher->key_len > 0) |
---|
532 | { |
---|
533 | printf("key="); |
---|
534 | for (i=0; i<cipher->key_len; i++) |
---|
535 | printf("%02X",key[i]); |
---|
536 | printf("\n"); |
---|
537 | } |
---|
538 | if (cipher->iv_len > 0) |
---|
539 | { |
---|
540 | printf("iv ="); |
---|
541 | for (i=0; i<cipher->iv_len; i++) |
---|
542 | printf("%02X",iv[i]); |
---|
543 | printf("\n"); |
---|
544 | } |
---|
545 | if (printkey == 2) |
---|
546 | { |
---|
547 | ret=0; |
---|
548 | goto end; |
---|
549 | } |
---|
550 | } |
---|
551 | } |
---|
552 | |
---|
553 | /* Only encrypt/decrypt as we write the file */ |
---|
554 | if (benc != NULL) |
---|
555 | wbio=BIO_push(benc,wbio); |
---|
556 | |
---|
557 | for (;;) |
---|
558 | { |
---|
559 | inl=BIO_read(rbio,(char *)buff,bsize); |
---|
560 | if (inl <= 0) break; |
---|
561 | if (BIO_write(wbio,(char *)buff,inl) != inl) |
---|
562 | { |
---|
563 | BIO_printf(bio_err,"error writing output file\n"); |
---|
564 | goto end; |
---|
565 | } |
---|
566 | } |
---|
567 | if (!BIO_flush(wbio)) |
---|
568 | { |
---|
569 | BIO_printf(bio_err,"bad decrypt\n"); |
---|
570 | goto end; |
---|
571 | } |
---|
572 | |
---|
573 | ret=0; |
---|
574 | if (verbose) |
---|
575 | { |
---|
576 | BIO_printf(bio_err,"bytes read :%8ld\n",BIO_number_read(in)); |
---|
577 | BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out)); |
---|
578 | } |
---|
579 | end: |
---|
580 | ERR_print_errors(bio_err); |
---|
581 | if (strbuf != NULL) OPENSSL_free(strbuf); |
---|
582 | if (buff != NULL) OPENSSL_free(buff); |
---|
583 | if (in != NULL) BIO_free(in); |
---|
584 | if (out != NULL) BIO_free_all(out); |
---|
585 | if (benc != NULL) BIO_free(benc); |
---|
586 | if (b64 != NULL) BIO_free(b64); |
---|
587 | if(pass) OPENSSL_free(pass); |
---|
588 | apps_shutdown(); |
---|
589 | OPENSSL_EXIT(ret); |
---|
590 | } |
---|
591 | |
---|
592 | int set_hex(char *in, unsigned char *out, int size) |
---|
593 | { |
---|
594 | int i,n; |
---|
595 | unsigned char j; |
---|
596 | |
---|
597 | n=strlen(in); |
---|
598 | if (n > (size*2)) |
---|
599 | { |
---|
600 | BIO_printf(bio_err,"hex string is too long\n"); |
---|
601 | return(0); |
---|
602 | } |
---|
603 | memset(out,0,size); |
---|
604 | for (i=0; i<n; i++) |
---|
605 | { |
---|
606 | j=(unsigned char)*in; |
---|
607 | *(in++)='\0'; |
---|
608 | if (j == 0) break; |
---|
609 | if ((j >= '0') && (j <= '9')) |
---|
610 | j-='0'; |
---|
611 | else if ((j >= 'A') && (j <= 'F')) |
---|
612 | j=j-'A'+10; |
---|
613 | else if ((j >= 'a') && (j <= 'f')) |
---|
614 | j=j-'a'+10; |
---|
615 | else |
---|
616 | { |
---|
617 | BIO_printf(bio_err,"non-hex digit\n"); |
---|
618 | return(0); |
---|
619 | } |
---|
620 | if (i&1) |
---|
621 | out[i/2]|=j; |
---|
622 | else |
---|
623 | out[i/2]=(j<<4); |
---|
624 | } |
---|
625 | return(1); |
---|
626 | } |
---|