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/*
* Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <openssl/opensslconf.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "apps.h"
#include "progs.h"
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/rsa.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/bn.h>
typedef enum OPTION_choice {
OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
OPT_INFORM, OPT_OUTFORM, OPT_ENGINE, OPT_IN, OPT_OUT,
OPT_PUBIN, OPT_PUBOUT, OPT_PASSOUT, OPT_PASSIN,
OPT_RSAPUBKEY_IN, OPT_RSAPUBKEY_OUT,
/* Do not change the order here; see case statements below */
OPT_PVK_NONE, OPT_PVK_WEAK, OPT_PVK_STRONG,
OPT_NOOUT, OPT_TEXT, OPT_MODULUS, OPT_CHECK, OPT_CIPHER
} OPTION_CHOICE;
const OPTIONS rsa_options[] = {
{"help", OPT_HELP, '-', "Display this summary"},
{"inform", OPT_INFORM, 'f', "Input format, one of DER PEM"},
{"outform", OPT_OUTFORM, 'f', "Output format, one of DER PEM PVK"},
{"in", OPT_IN, 's', "Input file"},
{"out", OPT_OUT, '>', "Output file"},
{"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
{"pubout", OPT_PUBOUT, '-', "Output a public key"},
{"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
{"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
{"RSAPublicKey_in", OPT_RSAPUBKEY_IN, '-', "Input is an RSAPublicKey"},
{"RSAPublicKey_out", OPT_RSAPUBKEY_OUT, '-', "Output is an RSAPublicKey"},
{"noout", OPT_NOOUT, '-', "Don't print key out"},
{"text", OPT_TEXT, '-', "Print the key in text"},
{"modulus", OPT_MODULUS, '-', "Print the RSA key modulus"},
{"check", OPT_CHECK, '-', "Verify key consistency"},
{"", OPT_CIPHER, '-', "Any supported cipher"},
#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4)
{"pvk-strong", OPT_PVK_STRONG, '-', "Enable 'Strong' PVK encoding level (default)"},
{"pvk-weak", OPT_PVK_WEAK, '-', "Enable 'Weak' PVK encoding level"},
{"pvk-none", OPT_PVK_NONE, '-', "Don't enforce PVK encoding"},
#endif
#ifndef OPENSSL_NO_ENGINE
{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
#endif
{NULL}
};
int rsa_main(int argc, char **argv)
{
ENGINE *e = NULL;
BIO *out = NULL;
RSA *rsa = NULL;
const EVP_CIPHER *enc = NULL;
char *infile = NULL, *outfile = NULL, *prog;
char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
int i, private = 0;
int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, check = 0;
int noout = 0, modulus = 0, pubin = 0, pubout = 0, ret = 1;
#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4)
int pvk_encr = 2;
#endif
OPTION_CHOICE o;
prog = opt_init(argc, argv, rsa_options);
while ((o = opt_next()) != OPT_EOF) {
switch (o) {
case OPT_EOF:
case OPT_ERR:
opthelp:
BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
goto end;
case OPT_HELP:
opt_help(rsa_options);
ret = 0;
goto end;
case OPT_INFORM:
if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
goto opthelp;
break;
case OPT_IN:
infile = opt_arg();
break;
case OPT_OUTFORM:
if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
goto opthelp;
break;
case OPT_OUT:
outfile = opt_arg();
break;
case OPT_PASSIN:
passinarg = opt_arg();
break;
case OPT_PASSOUT:
passoutarg = opt_arg();
break;
case OPT_ENGINE:
e = setup_engine(opt_arg(), 0);
break;
case OPT_PUBIN:
pubin = 1;
break;
case OPT_PUBOUT:
pubout = 1;
break;
case OPT_RSAPUBKEY_IN:
pubin = 2;
break;
case OPT_RSAPUBKEY_OUT:
pubout = 2;
break;
case OPT_PVK_STRONG: /* pvk_encr:= 2 */
case OPT_PVK_WEAK: /* pvk_encr:= 1 */
case OPT_PVK_NONE: /* pvk_encr:= 0 */
#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4)
pvk_encr = (o - OPT_PVK_NONE);
#endif
break;
case OPT_NOOUT:
noout = 1;
break;
case OPT_TEXT:
text = 1;
break;
case OPT_MODULUS:
modulus = 1;
break;
case OPT_CHECK:
check = 1;
break;
case OPT_CIPHER:
if (!opt_cipher(opt_unknown(), &enc))
goto opthelp;
break;
}
}
argc = opt_num_rest();
if (argc != 0)
goto opthelp;
private = (text && !pubin) || (!pubout && !noout) ? 1 : 0;
if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
BIO_printf(bio_err, "Error getting passwords\n");
goto end;
}
if (check && pubin) {
BIO_printf(bio_err, "Only private keys can be checked\n");
goto end;
}
{
EVP_PKEY *pkey;
if (pubin) {
int tmpformat = -1;
if (pubin == 2) {
if (informat == FORMAT_PEM)
tmpformat = FORMAT_PEMRSA;
else if (informat == FORMAT_ASN1)
tmpformat = FORMAT_ASN1RSA;
} else {
tmpformat = informat;
}
pkey = load_pubkey(infile, tmpformat, 1, passin, e, "Public Key");
} else {
pkey = load_key(infile, informat, 1, passin, e, "Private Key");
}
if (pkey != NULL)
rsa = EVP_PKEY_get1_RSA(pkey);
EVP_PKEY_free(pkey);
}
if (rsa == NULL) {
ERR_print_errors(bio_err);
goto end;
}
out = bio_open_owner(outfile, outformat, private);
if (out == NULL)
goto end;
if (text) {
assert(pubin || private);
if (!RSA_print(out, rsa, 0)) {
perror(outfile);
ERR_print_errors(bio_err);
goto end;
}
}
if (modulus) {
const BIGNUM *n;
RSA_get0_key(rsa, &n, NULL, NULL);
BIO_printf(out, "Modulus=");
BN_print(out, n);
BIO_printf(out, "\n");
}
if (check) {
int r = RSA_check_key_ex(rsa, NULL);
if (r == 1) {
BIO_printf(out, "RSA key ok\n");
} else if (r == 0) {
unsigned long err;
while ((err = ERR_peek_error()) != 0 &&
ERR_GET_LIB(err) == ERR_LIB_RSA &&
ERR_GET_FUNC(err) == RSA_F_RSA_CHECK_KEY_EX &&
ERR_GET_REASON(err) != ERR_R_MALLOC_FAILURE) {
BIO_printf(out, "RSA key error: %s\n",
ERR_reason_error_string(err));
ERR_get_error(); /* remove err from error stack */
}
} else if (r == -1) {
ERR_print_errors(bio_err);
goto end;
}
}
if (noout) {
ret = 0;
goto end;
}
BIO_printf(bio_err, "writing RSA key\n");
if (outformat == FORMAT_ASN1) {
if (pubout || pubin) {
if (pubout == 2)
i = i2d_RSAPublicKey_bio(out, rsa);
else
i = i2d_RSA_PUBKEY_bio(out, rsa);
} else {
assert(private);
i = i2d_RSAPrivateKey_bio(out, rsa);
}
} else if (outformat == FORMAT_PEM) {
if (pubout || pubin) {
if (pubout == 2)
i = PEM_write_bio_RSAPublicKey(out, rsa);
else
i = PEM_write_bio_RSA_PUBKEY(out, rsa);
} else {
assert(private);
i = PEM_write_bio_RSAPrivateKey(out, rsa,
enc, NULL, 0, NULL, passout);
}
#ifndef OPENSSL_NO_DSA
} else if (outformat == FORMAT_MSBLOB || outformat == FORMAT_PVK) {
EVP_PKEY *pk;
pk = EVP_PKEY_new();
if (pk == NULL)
goto end;
EVP_PKEY_set1_RSA(pk, rsa);
if (outformat == FORMAT_PVK) {
if (pubin) {
BIO_printf(bio_err, "PVK form impossible with public key input\n");
EVP_PKEY_free(pk);
goto end;
}
assert(private);
# ifdef OPENSSL_NO_RC4
BIO_printf(bio_err, "PVK format not supported\n");
EVP_PKEY_free(pk);
goto end;
# else
i = i2b_PVK_bio(out, pk, pvk_encr, 0, passout);
# endif
} else if (pubin || pubout) {
i = i2b_PublicKey_bio(out, pk);
} else {
assert(private);
i = i2b_PrivateKey_bio(out, pk);
}
EVP_PKEY_free(pk);
#endif
} else {
BIO_printf(bio_err, "bad output format specified for outfile\n");
goto end;
}
if (i <= 0) {
BIO_printf(bio_err, "unable to write key\n");
ERR_print_errors(bio_err);
} else {
ret = 0;
}
end:
release_engine(e);
BIO_free_all(out);
RSA_free(rsa);
OPENSSL_free(passin);
OPENSSL_free(passout);
return ret;
}
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