apps/rsautl.c

   1 /* rsautl.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58 #include "apps.h"
  59 #include <string.h>
  60 #include <openssl/err.h>
  61 #include <openssl/pem.h>
  62
  63 #define RSA_SIGN        1
  64 #define RSA_VERIFY      2
  65 #define RSA_ENCRYPT     3
  66 #define RSA_DECRYPT     4
  67
  68 #define KEY_PRIVKEY     1
  69 #define KEY_PUBKEY      2
  70 #define KEY_CERT        3
  71
  72 static void usage(void);
  73
  74 #undef PROG
  75
  76 #define PROG rsautl_main
  77
  78 int MAIN(int argc, char **);
  79
  80 int MAIN(int argc, char **argv)
  81 {
  82         BIO *in = NULL, *out = NULL;
  83         char *infile = NULL, *outfile = NULL;
  84         char *keyfile = NULL;
  85         char rsa_mode = RSA_VERIFY, key_type = KEY_PRIVKEY;
  86         int keyform = FORMAT_PEM;
  87         char need_priv = 0, badarg = 0, rev = 0;
  88         char hexdump = 0, asn1parse = 0;
  89         X509 *x;
  90         EVP_PKEY *pkey = NULL;
  91         RSA *rsa = NULL;
  92         unsigned char *rsa_in = NULL, *rsa_out = NULL, pad;
  93         int rsa_inlen, rsa_outlen = 0;
  94         int keysize;
  95
  96         int ret = 1;
  97
  98         argc--;
  99         argv++;
 100
 101         if(!bio_err) bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);
 102         ERR_load_crypto_strings();
 103         OpenSSL_add_all_algorithms();
 104         pad = RSA_PKCS1_PADDING;
 105
 106         while(argc >= 1)
 107         {
 108                 if (!strcmp(*argv,"-in")) {
 109                         if (--argc < 1) badarg = 1;
 110                         infile= *(++argv);
 111                 } else if (!strcmp(*argv,"-out")) {
 112                         if (--argc < 1) badarg = 1;
 113                         outfile= *(++argv);
 114                 } else if(!strcmp(*argv, "-inkey")) {
 115                         if (--argc < 1) badarg = 1;
 116                         keyfile = *(++argv);
 117                 } else if(!strcmp(*argv, "-pubin")) {
 118                         key_type = KEY_PUBKEY;
 119                 } else if(!strcmp(*argv, "-certin")) {
 120                         key_type = KEY_CERT;
 121                 }
 122                 else if(!strcmp(*argv, "-asn1parse")) asn1parse = 1;
 123                 else if(!strcmp(*argv, "-hexdump")) hexdump = 1;
 124                 else if(!strcmp(*argv, "-raw")) pad = RSA_NO_PADDING;
 125                 else if(!strcmp(*argv, "-oaep")) pad = RSA_PKCS1_OAEP_PADDING;
 126                 else if(!strcmp(*argv, "-ssl")) pad = RSA_SSLV23_PADDING;
 127                 else if(!strcmp(*argv, "-pkcs")) pad = RSA_PKCS1_PADDING;
 128                 else if(!strcmp(*argv, "-sign")) {
 129                         rsa_mode = RSA_SIGN;
 130                         need_priv = 1;
 131                 } else if(!strcmp(*argv, "-verify")) rsa_mode = RSA_VERIFY;
 132                 else if(!strcmp(*argv, "-rev")) rev = 1;
 133                 else if(!strcmp(*argv, "-encrypt")) rsa_mode = RSA_ENCRYPT;
 134                 else if(!strcmp(*argv, "-decrypt")) {
 135                         rsa_mode = RSA_DECRYPT;
 136                         need_priv = 1;
 137                 } else badarg = 1;
 138                 if(badarg) {
 139                         usage();
 140                         goto end;
 141                 }
 142                 argc--;
 143                 argv++;
 144         }
 145
 146         if(need_priv && (key_type != KEY_PRIVKEY)) {
 147                 BIO_printf(bio_err, "A private key is needed for this operation\n");
 148                 goto end;
 149         }
 150
 151 /* FIXME: seed PRNG only if needed */
 152         app_RAND_load_file(NULL, bio_err, 0);
 153
 154         switch(key_type) {
 155                 case KEY_PRIVKEY:
 156                 pkey = load_key(bio_err, keyfile, keyform, NULL);
 157                 break;
 158
 159                 case KEY_PUBKEY:
 160                 pkey = load_pubkey(bio_err, keyfile, keyform);
 161                 break;
 162
 163                 case KEY_CERT:
 164                 x = load_cert(bio_err, keyfile, keyform);
 165                 if(x) {
 166                         pkey = X509_get_pubkey(x);
 167                         X509_free(x);
 168                 }
 169                 break;
 170         }
 171
 172         if(!pkey) {
 173                 BIO_printf(bio_err, "Error loading key\n");
 174                 return 1;
 175         }
 176
 177         rsa = EVP_PKEY_get1_RSA(pkey);
 178         EVP_PKEY_free(pkey);
 179
 180         if(!rsa) {
 181                 BIO_printf(bio_err, "Error getting RSA key\n");
 182                 ERR_print_errors(bio_err);
 183                 goto end;
 184         }
 185
 186
 187         if(infile) {
 188                 if(!(in = BIO_new_file(infile, "rb"))) {
 189                         BIO_printf(bio_err, "Error Reading Input File\n");
 190                         ERR_print_errors(bio_err);
 191                         goto end;
 192                 }
 193         } else in = BIO_new_fp(stdin, BIO_NOCLOSE);
 194
 195         if(outfile) {
 196                 if(!(out = BIO_new_file(outfile, "wb"))) {
 197                         BIO_printf(bio_err, "Error Reading Output File\n");
 198                         ERR_print_errors(bio_err);
 199                         goto end;
 200                 }
 201         } else {
 202                 out = BIO_new_fp(stdout, BIO_NOCLOSE);
 203 #ifdef VMS
 204                 {
 205                     BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 206                     out = BIO_push(tmpbio, out);
 207                 }
 208 #endif
 209         }
 210
 211         keysize = RSA_size(rsa);
 212
 213         rsa_in = OPENSSL_malloc(keysize * 2);
 214         rsa_out = OPENSSL_malloc(keysize);
 215
 216         /* Read the input data */
 217         rsa_inlen = BIO_read(in, rsa_in, keysize * 2);
 218         if(rsa_inlen <= 0) {
 219                 BIO_printf(bio_err, "Error reading input Data\n");
 220                 exit(1);
 221         }
 222         if(rev) {
 223                 int i;
 224                 unsigned char ctmp;
 225                 for(i = 0; i < rsa_inlen/2; i++) {
 226                         ctmp = rsa_in[i];
 227                         rsa_in[i] = rsa_in[rsa_inlen - 1 - i];
 228                         rsa_in[rsa_inlen - 1 - i] = ctmp;
 229                 }
 230         }
 231         switch(rsa_mode) {
 232
 233                 case RSA_VERIFY:
 234                         rsa_outlen  = RSA_public_decrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
 235                 break;
 236
 237                 case RSA_SIGN:
 238                         rsa_outlen  = RSA_private_encrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
 239                 break;
 240
 241                 case RSA_ENCRYPT:
 242                         rsa_outlen  = RSA_public_encrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
 243                 break;
 244
 245                 case RSA_DECRYPT:
 246                         rsa_outlen  = RSA_private_decrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
 247                 break;
 248
 249         }
 250
 251         if(rsa_outlen <= 0) {
 252                 BIO_printf(bio_err, "RSA operation error\n");
 253                 ERR_print_errors(bio_err);
 254                 goto end;
 255         }
 256         ret = 0;
 257         if(asn1parse) {
 258                 if(!ASN1_parse_dump(out, rsa_out, rsa_outlen, 1, -1)) {
 259                         ERR_print_errors(bio_err);
 260                 }
 261         } else if(hexdump) BIO_dump(out, (char *)rsa_out, rsa_outlen);
 262         else BIO_write(out, rsa_out, rsa_outlen);
 263         end:
 264         RSA_free(rsa);
 265         BIO_free(in);
 266         BIO_free_all(out);
 267         if(rsa_in) OPENSSL_free(rsa_in);
 268         if(rsa_out) OPENSSL_free(rsa_out);
 269         return ret;
 270 }
 271
 272 static void usage()
 273 {
 274         BIO_printf(bio_err, "Usage: rsautl [options]\n");
 275         BIO_printf(bio_err, "-in file        input file\n");
 276         BIO_printf(bio_err, "-out file       output file\n");
 277         BIO_printf(bio_err, "-inkey file     input key\n");
 278         BIO_printf(bio_err, "-pubin          input is an RSA public\n");
 279         BIO_printf(bio_err, "-certin         input is a certificate carrying an RSA public key\n");
 280         BIO_printf(bio_err, "-ssl            use SSL v2 padding\n");
 281         BIO_printf(bio_err, "-raw            use no padding\n");
 282         BIO_printf(bio_err, "-pkcs           use PKCS#1 v1.5 padding (default)\n");
 283         BIO_printf(bio_err, "-oaep           use PKCS#1 OAEP\n");
 284         BIO_printf(bio_err, "-sign           sign with private key\n");
 285         BIO_printf(bio_err, "-verify         verify with public key\n");
 286         BIO_printf(bio_err, "-encrypt        encrypt with public key\n");
 287         BIO_printf(bio_err, "-decrypt        decrypt with private key\n");
 288         BIO_printf(bio_err, "-hexdump        hex dump output\n");
 289 }
 290