/*
* 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/dsa.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_IN, OPT_OUT, OPT_ENGINE,
/* 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_PUBIN,
OPT_PUBOUT, OPT_CIPHER, OPT_PASSIN, OPT_PASSOUT
} OPTION_CHOICE;
const OPTIONS dsa_options[] = {
{"help", OPT_HELP, '-', "Display this summary"},
{"inform", OPT_INFORM, 'f', "Input format, DER PEM PVK"},
{"outform", OPT_OUTFORM, 'f', "Output format, DER PEM PVK"},
{"in", OPT_IN, 's', "Input key"},
{"out", OPT_OUT, '>', "Output file"},
{"noout", OPT_NOOUT, '-', "Don't print key out"},
{"text", OPT_TEXT, '-', "Print the key in text"},
{"modulus", OPT_MODULUS, '-', "Print the DSA public value"},
{"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
{"pubout", OPT_PUBOUT, '-', "Output public key, not private"},
{"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
{"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
{"", OPT_CIPHER, '-', "Any supported cipher"},
#ifndef 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 e, possibly a hardware device"},
#endif
{NULL}
};
int dsa_main(int argc, char **argv)
{
BIO *out = NULL;
DSA *dsa = NULL;
ENGINE *e = NULL;
const EVP_CIPHER *enc = NULL;
char *infile = NULL, *outfile = NULL, *prog;
char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
OPTION_CHOICE o;
int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, noout = 0;
int i, modulus = 0, pubin = 0, pubout = 0, ret = 1;
#ifndef OPENSSL_NO_RC4
int pvk_encr = 2;
#endif
int private = 0;
prog = opt_init(argc, argv, dsa_options);
while ((o = opt_next()) != OPT_EOF) {
switch (o) {
case OPT_EOF:
case OPT_ERR:
opthelp:
ret = 0;
BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
goto end;
case OPT_HELP:
opt_help(dsa_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_ENGINE:
e = setup_engine(opt_arg(), 0);
break;
case OPT_PASSIN:
passinarg = opt_arg();
break;
case OPT_PASSOUT:
passoutarg = opt_arg();
break;
case OPT_PVK_STRONG: /* pvk_encr:= 2 */
case OPT_PVK_WEAK: /* pvk_encr:= 1 */
case OPT_PVK_NONE: /* pvk_encr:= 0 */
#ifndef 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_PUBIN:
pubin = 1;
break;
case OPT_PUBOUT:
pubout = 1;
break;
case OPT_CIPHER:
if (!opt_cipher(opt_unknown(), &enc))
goto end;
break;
}
}
argc = opt_num_rest();
if (argc != 0)
goto opthelp;
private = pubin || pubout ? 0 : 1;
if (text && !pubin)
private = 1;
if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
BIO_printf(bio_err, "Error getting passwords\n");
goto end;
}
BIO_printf(bio_err, "read DSA key\n");
{
EVP_PKEY *pkey;
if (pubin)
pkey = load_pubkey(infile, informat, 1, passin, e, "Public Key");
else
pkey = load_key(infile, informat, 1, passin, e, "Private Key");
if (pkey != NULL) {
dsa = EVP_PKEY_get1_DSA(pkey);
EVP_PKEY_free(pkey);
}
}
if (dsa == NULL) {
BIO_printf(bio_err, "unable to load Key\n");
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 (!DSA_print(out, dsa, 0)) {
perror(outfile);
ERR_print_errors(bio_err);
goto end;
}
}
if (modulus) {
const BIGNUM *pub_key = NULL;
DSA_get0_key(dsa, &pub_key, NULL);
BIO_printf(out, "Public Key=");
BN_print(out, pub_key);
BIO_printf(out, "\n");
}
if (noout) {
ret = 0;
goto end;
}
BIO_printf(bio_err, "writing DSA key\n");
if (outformat == FORMAT_ASN1) {
if (pubin || pubout) {
i = i2d_DSA_PUBKEY_bio(out, dsa);
} else {
assert(private);
i = i2d_DSAPrivateKey_bio(out, dsa);
}
} else if (outformat == FORMAT_PEM) {
if (pubin || pubout) {
i = PEM_write_bio_DSA_PUBKEY(out, dsa);
} else {
assert(private);
i = PEM_write_bio_DSAPrivateKey(out, dsa, enc,
NULL, 0, NULL, passout);
}
#ifndef OPENSSL_NO_RSA
} else if (outformat == FORMAT_MSBLOB || outformat == FORMAT_PVK) {
EVP_PKEY *pk;
pk = EVP_PKEY_new();
if (pk == NULL)
goto end;
EVP_PKEY_set1_DSA(pk, dsa);
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 private key\n");
ERR_print_errors(bio_err);
goto end;
}
ret = 0;
end:
BIO_free_all(out);
DSA_free(dsa);
release_engine(e);
OPENSSL_free(passin);
OPENSSL_free(passout);
return ret;
}