apps/rsa.c

   1 /*
   2  * Copyright 1995-2018 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 #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     OPT_SECTION("General"),
  41     {"help", OPT_HELP, '-', "Display this summary"},
  42     {"check", OPT_CHECK, '-', "Verify key consistency"},
  43     {"", OPT_CIPHER, '-', "Any supported cipher"},
  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, 's', "Input file"},
  50     {"inform", OPT_INFORM, 'f', "Input format, one of DER PEM"},
  51     {"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
  52     {"RSAPublicKey_in", OPT_RSAPUBKEY_IN, '-', "Input is an RSAPublicKey"},
  53     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  54
  55     OPT_SECTION("Output"),
  56     {"out", OPT_OUT, '>', "Output file"},
  57     {"outform", OPT_OUTFORM, 'f', "Output format, one of DER PEM PVK"},
  58     {"pubout", OPT_PUBOUT, '-', "Output a public key"},
  59     {"RSAPublicKey_out", OPT_RSAPUBKEY_OUT, '-', "Output is an RSAPublicKey"},
  60     {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
  61     {"noout", OPT_NOOUT, '-', "Don't print key out"},
  62     {"text", OPT_TEXT, '-', "Print the key in text"},
  63     {"modulus", OPT_MODULUS, '-', "Print the RSA key modulus"},
  64
  65 # if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4)
  66     OPT_SECTION("PVK"),
  67     {"pvk-strong", OPT_PVK_STRONG, '-', "Enable 'Strong' PVK encoding level (default)"},
  68     {"pvk-weak", OPT_PVK_WEAK, '-', "Enable 'Weak' PVK encoding level"},
  69     {"pvk-none", OPT_PVK_NONE, '-', "Don't enforce PVK encoding"},
  70 # endif
  71     {NULL}
  72 };
  73
  74 int rsa_main(int argc, char **argv)
  75 {
  76     ENGINE *e = NULL;
  77     BIO *out = NULL;
  78     RSA *rsa = NULL;
  79     const EVP_CIPHER *enc = NULL;
  80     char *infile = NULL, *outfile = NULL, *prog;
  81     char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
  82     int i, private = 0;
  83     int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, check = 0;
  84     int noout = 0, modulus = 0, pubin = 0, pubout = 0, ret = 1;
  85 # if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4)
  86     int pvk_encr = 2;
  87 # endif
  88     OPTION_CHOICE o;
  89
  90     prog = opt_init(argc, argv, rsa_options);
  91     while ((o = opt_next()) != OPT_EOF) {
  92         switch (o) {
  93         case OPT_EOF:
  94         case OPT_ERR:
  95  opthelp:
  96             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  97             goto end;
  98         case OPT_HELP:
  99             opt_help(rsa_options);
 100             ret = 0;
 101             goto end;
 102         case OPT_INFORM:
 103             if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
 104                 goto opthelp;
 105             break;
 106         case OPT_IN:
 107             infile = opt_arg();
 108             break;
 109         case OPT_OUTFORM:
 110             if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
 111                 goto opthelp;
 112             break;
 113         case OPT_OUT:
 114             outfile = opt_arg();
 115             break;
 116         case OPT_PASSIN:
 117             passinarg = opt_arg();
 118             break;
 119         case OPT_PASSOUT:
 120             passoutarg = opt_arg();
 121             break;
 122         case OPT_ENGINE:
 123             e = setup_engine(opt_arg(), 0);
 124             break;
 125         case OPT_PUBIN:
 126             pubin = 1;
 127             break;
 128         case OPT_PUBOUT:
 129             pubout = 1;
 130             break;
 131         case OPT_RSAPUBKEY_IN:
 132             pubin = 2;
 133             break;
 134         case OPT_RSAPUBKEY_OUT:
 135             pubout = 2;
 136             break;
 137         case OPT_PVK_STRONG:    /* pvk_encr:= 2 */
 138         case OPT_PVK_WEAK:      /* pvk_encr:= 1 */
 139         case OPT_PVK_NONE:      /* pvk_encr:= 0 */
 140 # if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4)
 141             pvk_encr = (o - OPT_PVK_NONE);
 142 # endif
 143             break;
 144         case OPT_NOOUT:
 145             noout = 1;
 146             break;
 147         case OPT_TEXT:
 148             text = 1;
 149             break;
 150         case OPT_MODULUS:
 151             modulus = 1;
 152             break;
 153         case OPT_CHECK:
 154             check = 1;
 155             break;
 156         case OPT_CIPHER:
 157             if (!opt_cipher(opt_unknown(), &enc))
 158                 goto opthelp;
 159             break;
 160         }
 161     }
 162     argc = opt_num_rest();
 163     if (argc != 0)
 164         goto opthelp;
 165
 166     private = (text && !pubin) || (!pubout && !noout) ? 1 : 0;
 167
 168     if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
 169         BIO_printf(bio_err, "Error getting passwords\n");
 170         goto end;
 171     }
 172     if (check && pubin) {
 173         BIO_printf(bio_err, "Only private keys can be checked\n");
 174         goto end;
 175     }
 176
 177     {
 178         EVP_PKEY *pkey;
 179
 180         if (pubin) {
 181             int tmpformat = -1;
 182             if (pubin == 2) {
 183                 if (informat == FORMAT_PEM)
 184                     tmpformat = FORMAT_PEMRSA;
 185                 else if (informat == FORMAT_ASN1)
 186                     tmpformat = FORMAT_ASN1RSA;
 187             } else {
 188                 tmpformat = informat;
 189             }
 190
 191             pkey = load_pubkey(infile, tmpformat, 1, passin, e, "Public Key");
 192         } else {
 193             pkey = load_key(infile, informat, 1, passin, e, "Private Key");
 194         }
 195
 196         if (pkey != NULL)
 197             rsa = EVP_PKEY_get1_RSA(pkey);
 198         EVP_PKEY_free(pkey);
 199     }
 200
 201     if (rsa == NULL) {
 202         ERR_print_errors(bio_err);
 203         goto end;
 204     }
 205
 206     out = bio_open_owner(outfile, outformat, private);
 207     if (out == NULL)
 208         goto end;
 209
 210     if (text) {
 211         assert(pubin || private);
 212         if (!RSA_print(out, rsa, 0)) {
 213             perror(outfile);
 214             ERR_print_errors(bio_err);
 215             goto end;
 216         }
 217     }
 218
 219     if (modulus) {
 220         const BIGNUM *n;
 221         RSA_get0_key(rsa, &n, NULL, NULL);
 222         BIO_printf(out, "Modulus=");
 223         BN_print(out, n);
 224         BIO_printf(out, "\n");
 225     }
 226
 227     if (check) {
 228         int r = RSA_check_key_ex(rsa, NULL);
 229
 230         if (r == 1) {
 231             BIO_printf(out, "RSA key ok\n");
 232         } else if (r == 0) {
 233             unsigned long err;
 234
 235             while ((err = ERR_peek_error()) != 0 &&
 236                    ERR_GET_LIB(err) == ERR_LIB_RSA &&
 237                    ERR_GET_REASON(err) != ERR_R_MALLOC_FAILURE) {
 238                 BIO_printf(out, "RSA key error: %s\n",
 239                            ERR_reason_error_string(err));
 240                 ERR_get_error(); /* remove err from error stack */
 241             }
 242         } else if (r == -1) {
 243             ERR_print_errors(bio_err);
 244             goto end;
 245         }
 246     }
 247
 248     if (noout) {
 249         ret = 0;
 250         goto end;
 251     }
 252     BIO_printf(bio_err, "writing RSA key\n");
 253     if (outformat == FORMAT_ASN1) {
 254         if (pubout || pubin) {
 255             if (pubout == 2)
 256                 i = i2d_RSAPublicKey_bio(out, rsa);
 257             else
 258                 i = i2d_RSA_PUBKEY_bio(out, rsa);
 259         } else {
 260             assert(private);
 261             i = i2d_RSAPrivateKey_bio(out, rsa);
 262         }
 263     } else if (outformat == FORMAT_PEM) {
 264         if (pubout || pubin) {
 265             if (pubout == 2)
 266                 i = PEM_write_bio_RSAPublicKey(out, rsa);
 267             else
 268                 i = PEM_write_bio_RSA_PUBKEY(out, rsa);
 269         } else {
 270             assert(private);
 271             i = PEM_write_bio_RSAPrivateKey(out, rsa,
 272                                             enc, NULL, 0, NULL, passout);
 273         }
 274 # ifndef OPENSSL_NO_DSA
 275     } else if (outformat == FORMAT_MSBLOB || outformat == FORMAT_PVK) {
 276         EVP_PKEY *pk;
 277         pk = EVP_PKEY_new();
 278         if (pk == NULL)
 279             goto end;
 280
 281         EVP_PKEY_set1_RSA(pk, rsa);
 282         if (outformat == FORMAT_PVK) {
 283             if (pubin) {
 284                 BIO_printf(bio_err, "PVK form impossible with public key input\n");
 285                 EVP_PKEY_free(pk);
 286                 goto end;
 287             }
 288             assert(private);
 289 #  ifdef OPENSSL_NO_RC4
 290             BIO_printf(bio_err, "PVK format not supported\n");
 291             EVP_PKEY_free(pk);
 292             goto end;
 293 #  else
 294             i = i2b_PVK_bio(out, pk, pvk_encr, 0, passout);
 295 #  endif
 296         } else if (pubin || pubout) {
 297             i = i2b_PublicKey_bio(out, pk);
 298         } else {
 299             assert(private);
 300             i = i2b_PrivateKey_bio(out, pk);
 301         }
 302         EVP_PKEY_free(pk);
 303 # endif
 304     } else {
 305         BIO_printf(bio_err, "bad output format specified for outfile\n");
 306         goto end;
 307     }
 308     if (i <= 0) {
 309         BIO_printf(bio_err, "unable to write key\n");
 310         ERR_print_errors(bio_err);
 311     } else {
 312         ret = 0;
 313     }
 314  end:
 315     release_engine(e);
 316     BIO_free_all(out);
 317     RSA_free(rsa);
 318     OPENSSL_free(passin);
 319     OPENSSL_free(passout);
 320     return ret;
 321 }
 322 #endif