apps/rsautl.c

   1 /*
   2  * Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 /* We need to use the deprecated RSA low level calls */
  11 #define OPENSSL_SUPPRESS_DEPRECATED
  12
  13 #include <openssl/opensslconf.h>
  14
  15 #include "apps.h"
  16 #include "progs.h"
  17 #include <string.h>
  18 #include <openssl/err.h>
  19 #include <openssl/pem.h>
  20 #include <openssl/rsa.h>
  21
  22 #define RSA_SIGN        1
  23 #define RSA_VERIFY      2
  24 #define RSA_ENCRYPT     3
  25 #define RSA_DECRYPT     4
  26
  27 #define KEY_PRIVKEY     1
  28 #define KEY_PUBKEY      2
  29 #define KEY_CERT        3
  30
  31 typedef enum OPTION_choice {
  32     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  33     OPT_ENGINE, OPT_IN, OPT_OUT, OPT_ASN1PARSE, OPT_HEXDUMP,
  34     OPT_RSA_RAW, OPT_OAEP, OPT_SSL, OPT_PKCS, OPT_X931,
  35     OPT_SIGN, OPT_VERIFY, OPT_REV, OPT_ENCRYPT, OPT_DECRYPT,
  36     OPT_PUBIN, OPT_CERTIN, OPT_INKEY, OPT_PASSIN, OPT_KEYFORM,
  37     OPT_R_ENUM, OPT_PROV_ENUM
  38 } OPTION_CHOICE;
  39
  40 const OPTIONS rsautl_options[] = {
  41     OPT_SECTION("General"),
  42     {"help", OPT_HELP, '-', "Display this summary"},
  43     {"sign", OPT_SIGN, '-', "Sign with private key"},
  44     {"verify", OPT_VERIFY, '-', "Verify with public key"},
  45     {"encrypt", OPT_ENCRYPT, '-', "Encrypt with public key"},
  46     {"decrypt", OPT_DECRYPT, '-', "Decrypt with private key"},
  47 #ifndef OPENSSL_NO_ENGINE
  48     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  49 #endif
  50
  51     OPT_SECTION("Input"),
  52     {"in", OPT_IN, '<', "Input file"},
  53     {"inkey", OPT_INKEY, 's', "Input key"},
  54     {"keyform", OPT_KEYFORM, 'E', "Private key format (ENGINE, other values ignored)"},
  55     {"pubin", OPT_PUBIN, '-', "Input is an RSA public"},
  56     {"certin", OPT_CERTIN, '-', "Input is a cert carrying an RSA public key"},
  57     {"rev", OPT_REV, '-', "Reverse the order of the input buffer"},
  58     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  59
  60     OPT_SECTION("Output"),
  61     {"out", OPT_OUT, '>', "Output file"},
  62     {"ssl", OPT_SSL, '-', "Use SSL v2 padding"},
  63     {"raw", OPT_RSA_RAW, '-', "Use no padding"},
  64     {"pkcs", OPT_PKCS, '-', "Use PKCS#1 v1.5 padding (default)"},
  65     {"x931", OPT_X931, '-', "Use ANSI X9.31 padding"},
  66     {"oaep", OPT_OAEP, '-', "Use PKCS#1 OAEP"},
  67     {"asn1parse", OPT_ASN1PARSE, '-',
  68      "Run output through asn1parse; useful with -verify"},
  69     {"hexdump", OPT_HEXDUMP, '-', "Hex dump output"},
  70
  71     OPT_R_OPTIONS,
  72     OPT_PROV_OPTIONS,
  73     {NULL}
  74 };
  75
  76 int rsautl_main(int argc, char **argv)
  77 {
  78     BIO *in = NULL, *out = NULL;
  79     ENGINE *e = NULL;
  80     EVP_PKEY *pkey = NULL;
  81     RSA *rsa = NULL;
  82     X509 *x;
  83     char *infile = NULL, *outfile = NULL, *keyfile = NULL;
  84     char *passinarg = NULL, *passin = NULL, *prog;
  85     char rsa_mode = RSA_VERIFY, key_type = KEY_PRIVKEY;
  86     unsigned char *rsa_in = NULL, *rsa_out = NULL, pad = RSA_PKCS1_PADDING;
  87     int rsa_inlen, keyformat = FORMAT_PEM, keysize, ret = 1;
  88     int rsa_outlen = 0, hexdump = 0, asn1parse = 0, need_priv = 0, rev = 0;
  89     OPTION_CHOICE o;
  90
  91     prog = opt_init(argc, argv, rsautl_options);
  92     while ((o = opt_next()) != OPT_EOF) {
  93         switch (o) {
  94         case OPT_EOF:
  95         case OPT_ERR:
  96  opthelp:
  97             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  98             goto end;
  99         case OPT_HELP:
 100             opt_help(rsautl_options);
 101             ret = 0;
 102             goto end;
 103         case OPT_KEYFORM:
 104             if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyformat))
 105                 goto opthelp;
 106             break;
 107         case OPT_IN:
 108             infile = opt_arg();
 109             break;
 110         case OPT_OUT:
 111             outfile = opt_arg();
 112             break;
 113         case OPT_ENGINE:
 114             e = setup_engine(opt_arg(), 0);
 115             break;
 116         case OPT_ASN1PARSE:
 117             asn1parse = 1;
 118             break;
 119         case OPT_HEXDUMP:
 120             hexdump = 1;
 121             break;
 122         case OPT_RSA_RAW:
 123             pad = RSA_NO_PADDING;
 124             break;
 125         case OPT_OAEP:
 126             pad = RSA_PKCS1_OAEP_PADDING;
 127             break;
 128         case OPT_SSL:
 129             pad = RSA_SSLV23_PADDING;
 130             break;
 131         case OPT_PKCS:
 132             pad = RSA_PKCS1_PADDING;
 133             break;
 134         case OPT_X931:
 135             pad = RSA_X931_PADDING;
 136             break;
 137         case OPT_SIGN:
 138             rsa_mode = RSA_SIGN;
 139             need_priv = 1;
 140             break;
 141         case OPT_VERIFY:
 142             rsa_mode = RSA_VERIFY;
 143             break;
 144         case OPT_REV:
 145             rev = 1;
 146             break;
 147         case OPT_ENCRYPT:
 148             rsa_mode = RSA_ENCRYPT;
 149             break;
 150         case OPT_DECRYPT:
 151             rsa_mode = RSA_DECRYPT;
 152             need_priv = 1;
 153             break;
 154         case OPT_PUBIN:
 155             key_type = KEY_PUBKEY;
 156             break;
 157         case OPT_CERTIN:
 158             key_type = KEY_CERT;
 159             break;
 160         case OPT_INKEY:
 161             keyfile = opt_arg();
 162             break;
 163         case OPT_PASSIN:
 164             passinarg = opt_arg();
 165             break;
 166         case OPT_R_CASES:
 167             if (!opt_rand(o))
 168                 goto end;
 169             break;
 170         case OPT_PROV_CASES:
 171             if (!opt_provider(o))
 172                 goto end;
 173             break;
 174         }
 175     }
 176     argc = opt_num_rest();
 177     if (argc != 0)
 178         goto opthelp;
 179
 180     if (need_priv && (key_type != KEY_PRIVKEY)) {
 181         BIO_printf(bio_err, "A private key is needed for this operation\n");
 182         goto end;
 183     }
 184
 185     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 186         BIO_printf(bio_err, "Error getting password\n");
 187         goto end;
 188     }
 189
 190     switch (key_type) {
 191     case KEY_PRIVKEY:
 192         pkey = load_key(keyfile, keyformat, 0, passin, e, "Private Key");
 193         break;
 194
 195     case KEY_PUBKEY:
 196         pkey = load_pubkey(keyfile, keyformat, 0, NULL, e, "Public Key");
 197         break;
 198
 199     case KEY_CERT:
 200         x = load_cert(keyfile, FORMAT_UNDEF, "Certificate");
 201         if (x) {
 202             pkey = X509_get_pubkey(x);
 203             X509_free(x);
 204         }
 205         break;
 206     }
 207
 208     if (pkey == NULL)
 209         return 1;
 210
 211     rsa = EVP_PKEY_get1_RSA(pkey);
 212     EVP_PKEY_free(pkey);
 213
 214     if (rsa == NULL) {
 215         BIO_printf(bio_err, "Error getting RSA key\n");
 216         ERR_print_errors(bio_err);
 217         goto end;
 218     }
 219
 220     in = bio_open_default(infile, 'r', FORMAT_BINARY);
 221     if (in == NULL)
 222         goto end;
 223     out = bio_open_default(outfile, 'w', FORMAT_BINARY);
 224     if (out == NULL)
 225         goto end;
 226
 227     keysize = RSA_size(rsa);
 228
 229     rsa_in = app_malloc(keysize * 2, "hold rsa key");
 230     rsa_out = app_malloc(keysize, "output rsa key");
 231
 232     /* Read the input data */
 233     rsa_inlen = BIO_read(in, rsa_in, keysize * 2);
 234     if (rsa_inlen < 0) {
 235         BIO_printf(bio_err, "Error reading input Data\n");
 236         goto end;
 237     }
 238     if (rev) {
 239         int i;
 240         unsigned char ctmp;
 241         for (i = 0; i < rsa_inlen / 2; i++) {
 242             ctmp = rsa_in[i];
 243             rsa_in[i] = rsa_in[rsa_inlen - 1 - i];
 244             rsa_in[rsa_inlen - 1 - i] = ctmp;
 245         }
 246     }
 247     switch (rsa_mode) {
 248
 249     case RSA_VERIFY:
 250         rsa_outlen = RSA_public_decrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
 251         break;
 252
 253     case RSA_SIGN:
 254         rsa_outlen =
 255             RSA_private_encrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
 256         break;
 257
 258     case RSA_ENCRYPT:
 259         rsa_outlen = RSA_public_encrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
 260         break;
 261
 262     case RSA_DECRYPT:
 263         rsa_outlen =
 264             RSA_private_decrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
 265         break;
 266     }
 267
 268     if (rsa_outlen < 0) {
 269         BIO_printf(bio_err, "RSA operation error\n");
 270         ERR_print_errors(bio_err);
 271         goto end;
 272     }
 273     ret = 0;
 274     if (asn1parse) {
 275         if (!ASN1_parse_dump(out, rsa_out, rsa_outlen, 1, -1)) {
 276             ERR_print_errors(bio_err);
 277         }
 278     } else if (hexdump) {
 279         BIO_dump(out, (char *)rsa_out, rsa_outlen);
 280     } else {
 281         BIO_write(out, rsa_out, rsa_outlen);
 282     }
 283  end:
 284     RSA_free(rsa);
 285     release_engine(e);
 286     BIO_free(in);
 287     BIO_free_all(out);
 288     OPENSSL_free(rsa_in);
 289     OPENSSL_free(rsa_out);
 290     OPENSSL_free(passin);
 291     return ret;
 292 }