apps/rsautl.c

   1 /*
   2  * Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <openssl/opensslconf.h>
  11 #ifdef OPENSSL_NO_RSA
  12 NON_EMPTY_TRANSLATION_UNIT
  13 #else
  14
  15 # include "apps.h"
  16 # include <string.h>
  17 # include <openssl/err.h>
  18 # include <openssl/pem.h>
  19 # include <openssl/rsa.h>
  20
  21 # define RSA_SIGN        1
  22 # define RSA_VERIFY      2
  23 # define RSA_ENCRYPT     3
  24 # define RSA_DECRYPT     4
  25
  26 # define KEY_PRIVKEY     1
  27 # define KEY_PUBKEY      2
  28 # define KEY_CERT        3
  29
  30 typedef enum OPTION_choice {
  31     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  32     OPT_ENGINE, OPT_IN, OPT_OUT, OPT_ASN1PARSE, OPT_HEXDUMP,
  33     OPT_RAW, OPT_OAEP, OPT_SSL, OPT_PKCS, OPT_X931,
  34     OPT_SIGN, OPT_VERIFY, OPT_REV, OPT_ENCRYPT, OPT_DECRYPT,
  35     OPT_PUBIN, OPT_CERTIN, OPT_INKEY, OPT_PASSIN, OPT_KEYFORM
  36 } OPTION_CHOICE;
  37
  38 const OPTIONS rsautl_options[] = {
  39     {"help", OPT_HELP, '-', "Display this summary"},
  40     {"in", OPT_IN, '<', "Input file"},
  41     {"out", OPT_OUT, '>', "Output file"},
  42     {"inkey", OPT_INKEY, 's', "Input key"},
  43     {"keyform", OPT_KEYFORM, 'E', "Private key format - default PEM"},
  44     {"pubin", OPT_PUBIN, '-', "Input is an RSA public"},
  45     {"certin", OPT_CERTIN, '-', "Input is a cert carrying an RSA public key"},
  46     {"ssl", OPT_SSL, '-', "Use SSL v2 padding"},
  47     {"raw", OPT_RAW, '-', "Use no padding"},
  48     {"pkcs", OPT_PKCS, '-', "Use PKCS#1 v1.5 padding (default)"},
  49     {"oaep", OPT_OAEP, '-', "Use PKCS#1 OAEP"},
  50     {"sign", OPT_SIGN, '-', "Sign with private key"},
  51     {"verify", OPT_VERIFY, '-', "Verify with public key"},
  52     {"asn1parse", OPT_ASN1PARSE, '-',
  53      "Run output through asn1parse; useful with -verify"},
  54     {"hexdump", OPT_HEXDUMP, '-', "Hex dump output"},
  55     {"x931", OPT_X931, '-', "Use ANSI X9.31 padding"},
  56     {"rev", OPT_REV, '-', "Reverse the order of the input buffer"},
  57     {"encrypt", OPT_ENCRYPT, '-', "Encrypt with public key"},
  58     {"decrypt", OPT_DECRYPT, '-', "Decrypt with private key"},
  59     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  60 # ifndef OPENSSL_NO_ENGINE
  61     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  62 # endif
  63     {NULL}
  64 };
  65
  66 int rsautl_main(int argc, char **argv)
  67 {
  68     BIO *in = NULL, *out = NULL;
  69     ENGINE *e = NULL;
  70     EVP_PKEY *pkey = NULL;
  71     RSA *rsa = NULL;
  72     X509 *x;
  73     char *infile = NULL, *outfile = NULL, *keyfile = NULL;
  74     char *passinarg = NULL, *passin = NULL, *prog;
  75     char rsa_mode = RSA_VERIFY, key_type = KEY_PRIVKEY;
  76     unsigned char *rsa_in = NULL, *rsa_out = NULL, pad = RSA_PKCS1_PADDING;
  77     int rsa_inlen, keyformat = FORMAT_PEM, keysize, ret = 1;
  78     int rsa_outlen = 0, hexdump = 0, asn1parse = 0, need_priv = 0, rev = 0;
  79     OPTION_CHOICE o;
  80
  81     prog = opt_init(argc, argv, rsautl_options);
  82     while ((o = opt_next()) != OPT_EOF) {
  83         switch (o) {
  84         case OPT_EOF:
  85         case OPT_ERR:
  86  opthelp:
  87             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  88             goto end;
  89         case OPT_HELP:
  90             opt_help(rsautl_options);
  91             ret = 0;
  92             goto end;
  93         case OPT_KEYFORM:
  94             if (!opt_format(opt_arg(), OPT_FMT_PDE, &keyformat))
  95                 goto opthelp;
  96             break;
  97         case OPT_IN:
  98             infile = opt_arg();
  99             break;
 100         case OPT_OUT:
 101             outfile = opt_arg();
 102             break;
 103         case OPT_ENGINE:
 104             e = setup_engine(opt_arg(), 0);
 105             break;
 106         case OPT_ASN1PARSE:
 107             asn1parse = 1;
 108             break;
 109         case OPT_HEXDUMP:
 110             hexdump = 1;
 111             break;
 112         case OPT_RAW:
 113             pad = RSA_NO_PADDING;
 114             break;
 115         case OPT_OAEP:
 116             pad = RSA_PKCS1_OAEP_PADDING;
 117             break;
 118         case OPT_SSL:
 119             pad = RSA_SSLV23_PADDING;
 120             break;
 121         case OPT_PKCS:
 122             pad = RSA_PKCS1_PADDING;
 123             break;
 124         case OPT_X931:
 125             pad = RSA_X931_PADDING;
 126             break;
 127         case OPT_SIGN:
 128             rsa_mode = RSA_SIGN;
 129             need_priv = 1;
 130             break;
 131         case OPT_VERIFY:
 132             rsa_mode = RSA_VERIFY;
 133             break;
 134         case OPT_REV:
 135             rev = 1;
 136             break;
 137         case OPT_ENCRYPT:
 138             rsa_mode = RSA_ENCRYPT;
 139             break;
 140         case OPT_DECRYPT:
 141             rsa_mode = RSA_DECRYPT;
 142             need_priv = 1;
 143             break;
 144         case OPT_PUBIN:
 145             key_type = KEY_PUBKEY;
 146             break;
 147         case OPT_CERTIN:
 148             key_type = KEY_CERT;
 149             break;
 150         case OPT_INKEY:
 151             keyfile = opt_arg();
 152             break;
 153         case OPT_PASSIN:
 154             passinarg = opt_arg();
 155             break;
 156         }
 157     }
 158     argc = opt_num_rest();
 159     if (argc != 0)
 160         goto opthelp;
 161
 162     if (need_priv && (key_type != KEY_PRIVKEY)) {
 163         BIO_printf(bio_err, "A private key is needed for this operation\n");
 164         goto end;
 165     }
 166
 167     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 168         BIO_printf(bio_err, "Error getting password\n");
 169         goto end;
 170     }
 171
 172 /* FIXME: seed PRNG only if needed */
 173     app_RAND_load_file(NULL, 0);
 174
 175     switch (key_type) {
 176     case KEY_PRIVKEY:
 177         pkey = load_key(keyfile, keyformat, 0, passin, e, "Private Key");
 178         break;
 179
 180     case KEY_PUBKEY:
 181         pkey = load_pubkey(keyfile, keyformat, 0, NULL, e, "Public Key");
 182         break;
 183
 184     case KEY_CERT:
 185         x = load_cert(keyfile, keyformat, "Certificate");
 186         if (x) {
 187             pkey = X509_get_pubkey(x);
 188             X509_free(x);
 189         }
 190         break;
 191     }
 192
 193     if (pkey == NULL)
 194         return 1;
 195
 196     rsa = EVP_PKEY_get1_RSA(pkey);
 197     EVP_PKEY_free(pkey);
 198
 199     if (rsa == NULL) {
 200         BIO_printf(bio_err, "Error getting RSA key\n");
 201         ERR_print_errors(bio_err);
 202         goto end;
 203     }
 204
 205     in = bio_open_default(infile, 'r', FORMAT_BINARY);
 206     if (in == NULL)
 207         goto end;
 208     out = bio_open_default(outfile, 'w', FORMAT_BINARY);
 209     if (out == NULL)
 210         goto end;
 211
 212     keysize = RSA_size(rsa);
 213
 214     rsa_in = app_malloc(keysize * 2, "hold rsa key");
 215     rsa_out = app_malloc(keysize, "output rsa key");
 216
 217     /* Read the input data */
 218     rsa_inlen = BIO_read(in, rsa_in, keysize * 2);
 219     if (rsa_inlen < 0) {
 220         BIO_printf(bio_err, "Error reading input Data\n");
 221         goto end;
 222     }
 223     if (rev) {
 224         int i;
 225         unsigned char ctmp;
 226         for (i = 0; i < rsa_inlen / 2; i++) {
 227             ctmp = rsa_in[i];
 228             rsa_in[i] = rsa_in[rsa_inlen - 1 - i];
 229             rsa_in[rsa_inlen - 1 - i] = ctmp;
 230         }
 231     }
 232     switch (rsa_mode) {
 233
 234     case RSA_VERIFY:
 235         rsa_outlen = RSA_public_decrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
 236         break;
 237
 238     case RSA_SIGN:
 239         rsa_outlen =
 240             RSA_private_encrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
 241         break;
 242
 243     case RSA_ENCRYPT:
 244         rsa_outlen = RSA_public_encrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
 245         break;
 246
 247     case RSA_DECRYPT:
 248         rsa_outlen =
 249             RSA_private_decrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
 250         break;
 251     }
 252
 253     if (rsa_outlen < 0) {
 254         BIO_printf(bio_err, "RSA operation error\n");
 255         ERR_print_errors(bio_err);
 256         goto end;
 257     }
 258     ret = 0;
 259     if (asn1parse) {
 260         if (!ASN1_parse_dump(out, rsa_out, rsa_outlen, 1, -1)) {
 261             ERR_print_errors(bio_err);
 262         }
 263     } else if (hexdump) {
 264         BIO_dump(out, (char *)rsa_out, rsa_outlen);
 265     } else {
 266         BIO_write(out, rsa_out, rsa_outlen);
 267     }
 268  end:
 269     RSA_free(rsa);
 270     release_engine(e);
 271     BIO_free(in);
 272     BIO_free_all(out);
 273     OPENSSL_free(rsa_in);
 274     OPENSSL_free(rsa_out);
 275     OPENSSL_free(passin);
 276     return ret;
 277 }
 278 #endif