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1 /* crypto/rc4/rc4.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 <openssl/rc4.h> |
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63 #include <openssl/evp.h> |
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64 |
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65 char *usage[]={ |
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66 "usage: rc4 args\n", |
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67 "\n", |
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68 " -in arg - input file - default stdin\n", |
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69 " -out arg - output file - default stdout\n", |
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70 " -key key - password\n", |
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71 NULL |
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72 }; |
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73 |
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74 int main(int argc, char *argv[]) |
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75 { |
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76 FILE *in=NULL,*out=NULL; |
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77 char *infile=NULL,*outfile=NULL,*keystr=NULL; |
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78 RC4_KEY key; |
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79 char buf[BUFSIZ]; |
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80 int badops=0,i; |
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81 char **pp; |
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82 unsigned char md[MD5_DIGEST_LENGTH]; |
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83 |
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84 argc--; |
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85 argv++; |
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86 while (argc >= 1) |
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87 { |
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88 if (strcmp(*argv,"-in") == 0) |
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89 { |
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90 if (--argc < 1) goto bad; |
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91 infile= *(++argv); |
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92 } |
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93 else if (strcmp(*argv,"-out") == 0) |
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94 { |
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95 if (--argc < 1) goto bad; |
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96 outfile= *(++argv); |
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97 } |
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98 else if (strcmp(*argv,"-key") == 0) |
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99 { |
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100 if (--argc < 1) goto bad; |
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101 keystr= *(++argv); |
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102 } |
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103 else |
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104 { |
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105 fprintf(stderr,"unknown option %s\n",*argv); |
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106 badops=1; |
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107 break; |
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108 } |
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109 argc--; |
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110 argv++; |
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111 } |
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112 |
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113 if (badops) |
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114 { |
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115 bad: |
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116 for (pp=usage; (*pp != NULL); pp++) |
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117 fprintf(stderr,"%s",*pp); |
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118 exit(1); |
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119 } |
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120 |
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121 if (infile == NULL) |
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122 in=stdin; |
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123 else |
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124 { |
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125 in=fopen(infile,"r"); |
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126 if (in == NULL) |
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127 { |
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128 perror("open"); |
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129 exit(1); |
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130 } |
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131 |
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132 } |
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133 if (outfile == NULL) |
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134 out=stdout; |
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135 else |
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136 { |
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137 out=fopen(outfile,"w"); |
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138 if (out == NULL) |
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139 { |
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140 perror("open"); |
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141 exit(1); |
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142 } |
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143 } |
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144 |
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145 #ifdef OPENSSL_SYS_MSDOS |
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146 /* This should set the file to binary mode. */ |
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147 { |
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148 #include <fcntl.h> |
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149 setmode(fileno(in),O_BINARY); |
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150 setmode(fileno(out),O_BINARY); |
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151 } |
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152 #endif |
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153 |
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154 if (keystr == NULL) |
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155 { /* get key */ |
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156 i=EVP_read_pw_string(buf,BUFSIZ,"Enter RC4 password:",0); |
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157 if (i != 0) |
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158 { |
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159 OPENSSL_cleanse(buf,BUFSIZ); |
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160 fprintf(stderr,"bad password read\n"); |
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161 exit(1); |
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162 } |
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163 keystr=buf; |
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164 } |
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165 |
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166 EVP_Digest((unsigned char *)keystr,strlen(keystr),md,NULL,EVP_md5(),NULL); |
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167 OPENSSL_cleanse(keystr,strlen(keystr)); |
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168 RC4_set_key(&key,MD5_DIGEST_LENGTH,md); |
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169 |
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170 for(;;) |
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171 { |
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172 i=fread(buf,1,BUFSIZ,in); |
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173 if (i == 0) break; |
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174 if (i < 0) |
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175 { |
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176 perror("read"); |
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177 exit(1); |
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178 } |
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179 RC4(&key,(unsigned int)i,(unsigned char *)buf, |
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180 (unsigned char *)buf); |
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181 i=fwrite(buf,(unsigned int)i,1,out); |
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182 if (i != 1) |
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183 { |
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184 perror("write"); |
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185 exit(1); |
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186 } |
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187 } |
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188 fclose(out); |
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189 fclose(in); |
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190 exit(0); |
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191 return(1); |
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192 } |
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193 |