apps/rsa.c

   1 /*
   2  * Copyright 1995-2018 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 <stdio.h>
  16 # include <stdlib.h>
  17 # include <string.h>
  18 # include <time.h>
  19 # include "apps.h"
  20 # include "progs.h"
  21 # include <openssl/bio.h>
  22 # include <openssl/err.h>
  23 # include <openssl/rsa.h>
  24 # include <openssl/evp.h>
  25 # include <openssl/x509.h>
  26 # include <openssl/pem.h>
  27 # include <openssl/bn.h>
  28
  29 typedef enum OPTION_choice {
  30     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  31     OPT_INFORM, OPT_OUTFORM, OPT_ENGINE, OPT_IN, OPT_OUT,
  32     OPT_PUBIN, OPT_PUBOUT, OPT_PASSOUT, OPT_PASSIN,
  33     OPT_RSAPUBKEY_IN, OPT_RSAPUBKEY_OUT,
  34     /* Do not change the order here; see case statements below */
  35     OPT_PVK_NONE, OPT_PVK_WEAK, OPT_PVK_STRONG,
  36     OPT_NOOUT, OPT_TEXT, OPT_MODULUS, OPT_CHECK, OPT_CIPHER
  37 } OPTION_CHOICE;
  38
  39 const OPTIONS rsa_options[] = {
  40     {"help", OPT_HELP, '-', "Display this summary"},
  41     {"inform", OPT_INFORM, 'f', "Input format, one of DER NET PEM"},
  42     {"outform", OPT_OUTFORM, 'f', "Output format, one of DER NET PEM PVK"},
  43     {"in", OPT_IN, 's', "Input file"},
  44     {"out", OPT_OUT, '>', "Output file"},
  45     {"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
  46     {"pubout", OPT_PUBOUT, '-', "Output a public key"},
  47     {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
  48     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  49     {"RSAPublicKey_in", OPT_RSAPUBKEY_IN, '-', "Input is an RSAPublicKey"},
  50     {"RSAPublicKey_out", OPT_RSAPUBKEY_OUT, '-', "Output is an RSAPublicKey"},
  51     {"noout", OPT_NOOUT, '-', "Don't print key out"},
  52     {"text", OPT_TEXT, '-', "Print the key in text"},
  53     {"modulus", OPT_MODULUS, '-', "Print the RSA key modulus"},
  54     {"check", OPT_CHECK, '-', "Verify key consistency"},
  55     {"", OPT_CIPHER, '-', "Any supported cipher"},
  56 # if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4)
  57     {"pvk-strong", OPT_PVK_STRONG, '-', "Enable 'Strong' PVK encoding level (default)"},
  58     {"pvk-weak", OPT_PVK_WEAK, '-', "Enable 'Weak' PVK encoding level"},
  59     {"pvk-none", OPT_PVK_NONE, '-', "Don't enforce PVK encoding"},
  60 # endif
  61 # ifndef OPENSSL_NO_ENGINE
  62     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  63 # endif
  64     {NULL}
  65 };
  66
  67 int rsa_main(int argc, char **argv)
  68 {
  69     ENGINE *e = NULL;
  70     BIO *out = NULL;
  71     RSA *rsa = NULL;
  72     const EVP_CIPHER *enc = NULL;
  73     char *infile = NULL, *outfile = NULL, *prog;
  74     char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
  75     int i, private = 0;
  76     int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, check = 0;
  77     int noout = 0, modulus = 0, pubin = 0, pubout = 0, ret = 1;
  78 # if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4)
  79     int pvk_encr = 2;
  80 # endif
  81     OPTION_CHOICE o;
  82
  83     prog = opt_init(argc, argv, rsa_options);
  84     while ((o = opt_next()) != OPT_EOF) {
  85         switch (o) {
  86         case OPT_EOF:
  87         case OPT_ERR:
  88  opthelp:
  89             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  90             goto end;
  91         case OPT_HELP:
  92             opt_help(rsa_options);
  93             ret = 0;
  94             goto end;
  95         case OPT_INFORM:
  96             if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
  97                 goto opthelp;
  98             break;
  99         case OPT_IN:
 100             infile = opt_arg();
 101             break;
 102         case OPT_OUTFORM:
 103             if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
 104                 goto opthelp;
 105             break;
 106         case OPT_OUT:
 107             outfile = opt_arg();
 108             break;
 109         case OPT_PASSIN:
 110             passinarg = opt_arg();
 111             break;
 112         case OPT_PASSOUT:
 113             passoutarg = opt_arg();
 114             break;
 115         case OPT_ENGINE:
 116             e = setup_engine(opt_arg(), 0);
 117             break;
 118         case OPT_PUBIN:
 119             pubin = 1;
 120             break;
 121         case OPT_PUBOUT:
 122             pubout = 1;
 123             break;
 124         case OPT_RSAPUBKEY_IN:
 125             pubin = 2;
 126             break;
 127         case OPT_RSAPUBKEY_OUT:
 128             pubout = 2;
 129             break;
 130         case OPT_PVK_STRONG:    /* pvk_encr:= 2 */
 131         case OPT_PVK_WEAK:      /* pvk_encr:= 1 */
 132         case OPT_PVK_NONE:      /* pvk_encr:= 0 */
 133 # if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4)
 134             pvk_encr = (o - OPT_PVK_NONE);
 135 # endif
 136             break;
 137         case OPT_NOOUT:
 138             noout = 1;
 139             break;
 140         case OPT_TEXT:
 141             text = 1;
 142             break;
 143         case OPT_MODULUS:
 144             modulus = 1;
 145             break;
 146         case OPT_CHECK:
 147             check = 1;
 148             break;
 149         case OPT_CIPHER:
 150             if (!opt_cipher(opt_unknown(), &enc))
 151                 goto opthelp;
 152             break;
 153         }
 154     }
 155     argc = opt_num_rest();
 156     if (argc != 0)
 157         goto opthelp;
 158
 159     private = (text && !pubin) || (!pubout && !noout) ? 1 : 0;
 160
 161     if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
 162         BIO_printf(bio_err, "Error getting passwords\n");
 163         goto end;
 164     }
 165     if (check && pubin) {
 166         BIO_printf(bio_err, "Only private keys can be checked\n");
 167         goto end;
 168     }
 169
 170     {
 171         EVP_PKEY *pkey;
 172
 173         if (pubin) {
 174             int tmpformat = -1;
 175             if (pubin == 2) {
 176                 if (informat == FORMAT_PEM)
 177                     tmpformat = FORMAT_PEMRSA;
 178                 else if (informat == FORMAT_ASN1)
 179                     tmpformat = FORMAT_ASN1RSA;
 180             } else {
 181                 tmpformat = informat;
 182             }
 183
 184             pkey = load_pubkey(infile, tmpformat, 1, passin, e, "Public Key");
 185         } else {
 186             pkey = load_key(infile, informat, 1, passin, e, "Private Key");
 187         }
 188
 189         if (pkey != NULL)
 190             rsa = EVP_PKEY_get1_RSA(pkey);
 191         EVP_PKEY_free(pkey);
 192     }
 193
 194     if (rsa == NULL) {
 195         ERR_print_errors(bio_err);
 196         goto end;
 197     }
 198
 199     out = bio_open_owner(outfile, outformat, private);
 200     if (out == NULL)
 201         goto end;
 202
 203     if (text) {
 204         assert(pubin || private);
 205         if (!RSA_print(out, rsa, 0)) {
 206             perror(outfile);
 207             ERR_print_errors(bio_err);
 208             goto end;
 209         }
 210     }
 211
 212     if (modulus) {
 213         const BIGNUM *n;
 214         RSA_get0_key(rsa, &n, NULL, NULL);
 215         BIO_printf(out, "Modulus=");
 216         BN_print(out, n);
 217         BIO_printf(out, "\n");
 218     }
 219
 220     if (check) {
 221         int r = RSA_check_key_ex(rsa, NULL);
 222
 223         if (r == 1) {
 224             BIO_printf(out, "RSA key ok\n");
 225         } else if (r == 0) {
 226             unsigned long err;
 227
 228             while ((err = ERR_peek_error()) != 0 &&
 229                    ERR_GET_LIB(err) == ERR_LIB_RSA &&
 230                    ERR_GET_FUNC(err) == RSA_F_RSA_CHECK_KEY_EX &&
 231                    ERR_GET_REASON(err) != ERR_R_MALLOC_FAILURE) {
 232                 BIO_printf(out, "RSA key error: %s\n",
 233                            ERR_reason_error_string(err));
 234                 ERR_get_error(); /* remove err from error stack */
 235             }
 236         } else if (r == -1) {
 237             ERR_print_errors(bio_err);
 238             goto end;
 239         }
 240     }
 241
 242     if (noout) {
 243         ret = 0;
 244         goto end;
 245     }
 246     BIO_printf(bio_err, "writing RSA key\n");
 247     if (outformat == FORMAT_ASN1) {
 248         if (pubout || pubin) {
 249             if (pubout == 2)
 250                 i = i2d_RSAPublicKey_bio(out, rsa);
 251             else
 252                 i = i2d_RSA_PUBKEY_bio(out, rsa);
 253         } else {
 254             assert(private);
 255             i = i2d_RSAPrivateKey_bio(out, rsa);
 256         }
 257     } else if (outformat == FORMAT_PEM) {
 258         if (pubout || pubin) {
 259             if (pubout == 2)
 260                 i = PEM_write_bio_RSAPublicKey(out, rsa);
 261             else
 262                 i = PEM_write_bio_RSA_PUBKEY(out, rsa);
 263         } else {
 264             assert(private);
 265             i = PEM_write_bio_RSAPrivateKey(out, rsa,
 266                                             enc, NULL, 0, NULL, passout);
 267         }
 268 # ifndef OPENSSL_NO_DSA
 269     } else if (outformat == FORMAT_MSBLOB || outformat == FORMAT_PVK) {
 270         EVP_PKEY *pk;
 271         pk = EVP_PKEY_new();
 272         EVP_PKEY_set1_RSA(pk, rsa);
 273         if (outformat == FORMAT_PVK) {
 274             if (pubin) {
 275                 BIO_printf(bio_err, "PVK form impossible with public key input\n");
 276                 EVP_PKEY_free(pk);
 277                 goto end;
 278             }
 279             assert(private);
 280 #  ifdef OPENSSL_NO_RC4
 281             BIO_printf(bio_err, "PVK format not supported\n");
 282             EVP_PKEY_free(pk);
 283             goto end;
 284 #  else
 285             i = i2b_PVK_bio(out, pk, pvk_encr, 0, passout);
 286 #  endif
 287         } else if (pubin || pubout) {
 288             i = i2b_PublicKey_bio(out, pk);
 289         } else {
 290             assert(private);
 291             i = i2b_PrivateKey_bio(out, pk);
 292         }
 293         EVP_PKEY_free(pk);
 294 # endif
 295     } else {
 296         BIO_printf(bio_err, "bad output format specified for outfile\n");
 297         goto end;
 298     }
 299     if (i <= 0) {
 300         BIO_printf(bio_err, "unable to write key\n");
 301         ERR_print_errors(bio_err);
 302     } else {
 303         ret = 0;
 304     }
 305  end:
 306     release_engine(e);
 307     BIO_free_all(out);
 308     RSA_free(rsa);
 309     OPENSSL_free(passin);
 310     OPENSSL_free(passout);
 311     return ret;
 312 }
 313 #endif