apps/rsautl.c

   1 /*
   2  * Copyright 2000-2021 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 #include <openssl/opensslconf.h>
  11
  12 #include "apps.h"
  13 #include "progs.h"
  14 #include <string.h>
  15 #include <openssl/err.h>
  16 #include <openssl/pem.h>
  17 #include <openssl/rsa.h>
  18
  19 #define RSA_SIGN        1
  20 #define RSA_VERIFY      2
  21 #define RSA_ENCRYPT     3
  22 #define RSA_DECRYPT     4
  23
  24 #define KEY_PRIVKEY     1
  25 #define KEY_PUBKEY      2
  26 #define KEY_CERT        3
  27
  28 typedef enum OPTION_choice {
  29     OPT_COMMON,
  30     OPT_ENGINE, OPT_IN, OPT_OUT, OPT_ASN1PARSE, OPT_HEXDUMP,
  31     OPT_RSA_RAW, OPT_OAEP, OPT_PKCS, OPT_X931,
  32     OPT_SIGN, OPT_VERIFY, OPT_REV, OPT_ENCRYPT, OPT_DECRYPT,
  33     OPT_PUBIN, OPT_CERTIN, OPT_INKEY, OPT_PASSIN, OPT_KEYFORM,
  34     OPT_R_ENUM, OPT_PROV_ENUM
  35 } OPTION_CHOICE;
  36
  37 const OPTIONS rsautl_options[] = {
  38     OPT_SECTION("General"),
  39     {"help", OPT_HELP, '-', "Display this summary"},
  40     {"sign", OPT_SIGN, '-', "Sign with private key"},
  41     {"verify", OPT_VERIFY, '-', "Verify with public key"},
  42     {"encrypt", OPT_ENCRYPT, '-', "Encrypt with public key"},
  43     {"decrypt", OPT_DECRYPT, '-', "Decrypt with private key"},
  44 #ifndef OPENSSL_NO_ENGINE
  45     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  46 #endif
  47
  48     OPT_SECTION("Input"),
  49     {"in", OPT_IN, '<', "Input file"},
  50     {"inkey", OPT_INKEY, 's', "Input key"},
  51     {"keyform", OPT_KEYFORM, 'E', "Private key format (ENGINE, other values ignored)"},
  52     {"pubin", OPT_PUBIN, '-', "Input is an RSA public"},
  53     {"certin", OPT_CERTIN, '-', "Input is a cert carrying an RSA public key"},
  54     {"rev", OPT_REV, '-', "Reverse the order of the input buffer"},
  55     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  56
  57     OPT_SECTION("Output"),
  58     {"out", OPT_OUT, '>', "Output file"},
  59     {"raw", OPT_RSA_RAW, '-', "Use no padding"},
  60     {"pkcs", OPT_PKCS, '-', "Use PKCS#1 v1.5 padding (default)"},
  61     {"x931", OPT_X931, '-', "Use ANSI X9.31 padding"},
  62     {"oaep", OPT_OAEP, '-', "Use PKCS#1 OAEP"},
  63     {"asn1parse", OPT_ASN1PARSE, '-',
  64      "Run output through asn1parse; useful with -verify"},
  65     {"hexdump", OPT_HEXDUMP, '-', "Hex dump output"},
  66
  67     OPT_R_OPTIONS,
  68     OPT_PROV_OPTIONS,
  69     {NULL}
  70 };
  71
  72 int rsautl_main(int argc, char **argv)
  73 {
  74     BIO *in = NULL, *out = NULL;
  75     ENGINE *e = NULL;
  76     EVP_PKEY *pkey = NULL;
  77     EVP_PKEY_CTX *ctx = NULL;
  78     X509 *x;
  79     char *infile = NULL, *outfile = NULL, *keyfile = NULL;
  80     char *passinarg = NULL, *passin = NULL, *prog;
  81     char rsa_mode = RSA_VERIFY, key_type = KEY_PRIVKEY;
  82     unsigned char *rsa_in = NULL, *rsa_out = NULL, pad = RSA_PKCS1_PADDING;
  83     size_t rsa_inlen, rsa_outlen = 0;
  84     int keyformat = FORMAT_UNDEF, keysize, ret = 1, rv;
  85     int hexdump = 0, asn1parse = 0, need_priv = 0, rev = 0;
  86     OPTION_CHOICE o;
  87
  88     prog = opt_init(argc, argv, rsautl_options);
  89     while ((o = opt_next()) != OPT_EOF) {
  90         switch (o) {
  91         case OPT_EOF:
  92         case OPT_ERR:
  93  opthelp:
  94             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  95             goto end;
  96         case OPT_HELP:
  97             opt_help(rsautl_options);
  98             ret = 0;
  99             goto end;
 100         case OPT_KEYFORM:
 101             if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyformat))
 102                 goto opthelp;
 103             break;
 104         case OPT_IN:
 105             infile = opt_arg();
 106             break;
 107         case OPT_OUT:
 108             outfile = opt_arg();
 109             break;
 110         case OPT_ENGINE:
 111             e = setup_engine(opt_arg(), 0);
 112             break;
 113         case OPT_ASN1PARSE:
 114             asn1parse = 1;
 115             break;
 116         case OPT_HEXDUMP:
 117             hexdump = 1;
 118             break;
 119         case OPT_RSA_RAW:
 120             pad = RSA_NO_PADDING;
 121             break;
 122         case OPT_OAEP:
 123             pad = RSA_PKCS1_OAEP_PADDING;
 124             break;
 125         case OPT_PKCS:
 126             pad = RSA_PKCS1_PADDING;
 127             break;
 128         case OPT_X931:
 129             pad = RSA_X931_PADDING;
 130             break;
 131         case OPT_SIGN:
 132             rsa_mode = RSA_SIGN;
 133             need_priv = 1;
 134             break;
 135         case OPT_VERIFY:
 136             rsa_mode = RSA_VERIFY;
 137             break;
 138         case OPT_REV:
 139             rev = 1;
 140             break;
 141         case OPT_ENCRYPT:
 142             rsa_mode = RSA_ENCRYPT;
 143             break;
 144         case OPT_DECRYPT:
 145             rsa_mode = RSA_DECRYPT;
 146             need_priv = 1;
 147             break;
 148         case OPT_PUBIN:
 149             key_type = KEY_PUBKEY;
 150             break;
 151         case OPT_CERTIN:
 152             key_type = KEY_CERT;
 153             break;
 154         case OPT_INKEY:
 155             keyfile = opt_arg();
 156             break;
 157         case OPT_PASSIN:
 158             passinarg = opt_arg();
 159             break;
 160         case OPT_R_CASES:
 161             if (!opt_rand(o))
 162                 goto end;
 163             break;
 164         case OPT_PROV_CASES:
 165             if (!opt_provider(o))
 166                 goto end;
 167             break;
 168         }
 169     }
 170
 171     /* No extra arguments. */
 172     if (!opt_check_rest_arg(NULL))
 173         goto opthelp;
 174
 175     if (!app_RAND_load())
 176         goto end;
 177
 178     if (need_priv && (key_type != KEY_PRIVKEY)) {
 179         BIO_printf(bio_err, "A private key is needed for this operation\n");
 180         goto end;
 181     }
 182
 183     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 184         BIO_printf(bio_err, "Error getting password\n");
 185         goto end;
 186     }
 187
 188     switch (key_type) {
 189     case KEY_PRIVKEY:
 190         pkey = load_key(keyfile, keyformat, 0, passin, e, "private key");
 191         break;
 192
 193     case KEY_PUBKEY:
 194         pkey = load_pubkey(keyfile, keyformat, 0, NULL, e, "public key");
 195         break;
 196
 197     case KEY_CERT:
 198         x = load_cert(keyfile, FORMAT_UNDEF, "Certificate");
 199         if (x) {
 200             pkey = X509_get_pubkey(x);
 201             X509_free(x);
 202         }
 203         break;
 204     }
 205
 206     if (pkey == NULL)
 207         return 1;
 208
 209     in = bio_open_default(infile, 'r', FORMAT_BINARY);
 210     if (in == NULL)
 211         goto end;
 212     out = bio_open_default(outfile, 'w', FORMAT_BINARY);
 213     if (out == NULL)
 214         goto end;
 215
 216     keysize = EVP_PKEY_get_size(pkey);
 217
 218     rsa_in = app_malloc(keysize * 2, "hold rsa key");
 219     rsa_out = app_malloc(keysize, "output rsa key");
 220     rsa_outlen = keysize;
 221
 222     /* Read the input data */
 223     rv = BIO_read(in, rsa_in, keysize * 2);
 224     if (rv < 0) {
 225         BIO_printf(bio_err, "Error reading input Data\n");
 226         goto end;
 227     }
 228     rsa_inlen = rv;
 229     if (rev) {
 230         size_t i;
 231         unsigned char ctmp;
 232
 233         for (i = 0; i < rsa_inlen / 2; i++) {
 234             ctmp = rsa_in[i];
 235             rsa_in[i] = rsa_in[rsa_inlen - 1 - i];
 236             rsa_in[rsa_inlen - 1 - i] = ctmp;
 237         }
 238     }
 239
 240     if ((ctx = EVP_PKEY_CTX_new_from_pkey(NULL, pkey, NULL)) == NULL)
 241         goto end;
 242
 243     switch (rsa_mode) {
 244     case RSA_VERIFY:
 245         rv = EVP_PKEY_verify_recover_init(ctx)
 246             && EVP_PKEY_CTX_set_rsa_padding(ctx, pad)
 247             && EVP_PKEY_verify_recover(ctx, rsa_out, &rsa_outlen,
 248                                        rsa_in, rsa_inlen);
 249         break;
 250     case RSA_SIGN:
 251         rv = EVP_PKEY_sign_init(ctx)
 252             && EVP_PKEY_CTX_set_rsa_padding(ctx, pad)
 253             && EVP_PKEY_sign(ctx, rsa_out, &rsa_outlen, rsa_in, rsa_inlen);
 254         break;
 255     case RSA_ENCRYPT:
 256         rv = EVP_PKEY_encrypt_init(ctx)
 257             && EVP_PKEY_CTX_set_rsa_padding(ctx, pad)
 258             && EVP_PKEY_encrypt(ctx, rsa_out, &rsa_outlen, rsa_in, rsa_inlen);
 259         break;
 260     case RSA_DECRYPT:
 261         rv = EVP_PKEY_decrypt_init(ctx)
 262             && EVP_PKEY_CTX_set_rsa_padding(ctx, pad)
 263             && EVP_PKEY_decrypt(ctx, rsa_out, &rsa_outlen, rsa_in, rsa_inlen);
 264         break;
 265     }
 266
 267     if (!rv) {
 268         BIO_printf(bio_err, "RSA operation error\n");
 269         ERR_print_errors(bio_err);
 270         goto end;
 271     }
 272     ret = 0;
 273     if (asn1parse) {
 274         if (!ASN1_parse_dump(out, rsa_out, rsa_outlen, 1, -1)) {
 275             ERR_print_errors(bio_err);
 276         }
 277     } else if (hexdump) {
 278         BIO_dump(out, (char *)rsa_out, rsa_outlen);
 279     } else {
 280         BIO_write(out, rsa_out, rsa_outlen);
 281     }
 282  end:
 283     EVP_PKEY_CTX_free(ctx);
 284     EVP_PKEY_free(pkey);
 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 }