mirror of
https://github.com/openssl/openssl.git
synced 2024-12-27 06:21:43 +08:00
0336df2fa3
Issue a warning when generating DSA or RSA keys of size greater than OPENSSL_DSA_MAX_MODULUS_BITS resp. OPENSSL_RSA_MAX_MODULUS_BITS. Reviewed-by: Paul Dale <paul.dale@oracle.com> Reviewed-by: Rich Salz <rsalz@openssl.org> Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com> (Merged from https://github.com/openssl/openssl/pull/6380)
263 lines
7.7 KiB
C
263 lines
7.7 KiB
C
/*
|
|
* Copyright 1995-2018 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>
|
|
#ifdef OPENSSL_NO_DSA
|
|
NON_EMPTY_TRANSLATION_UNIT
|
|
#else
|
|
|
|
# include <stdio.h>
|
|
# include <stdlib.h>
|
|
# include <time.h>
|
|
# include <string.h>
|
|
# include "apps.h"
|
|
# include "progs.h"
|
|
# include <openssl/bio.h>
|
|
# include <openssl/err.h>
|
|
# include <openssl/bn.h>
|
|
# include <openssl/dsa.h>
|
|
# include <openssl/x509.h>
|
|
# include <openssl/pem.h>
|
|
|
|
static int dsa_cb(int p, int n, BN_GENCB *cb);
|
|
|
|
typedef enum OPTION_choice {
|
|
OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
|
|
OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_TEXT, OPT_C,
|
|
OPT_NOOUT, OPT_GENKEY, OPT_ENGINE, OPT_R_ENUM
|
|
} OPTION_CHOICE;
|
|
|
|
const OPTIONS dsaparam_options[] = {
|
|
{"help", OPT_HELP, '-', "Display this summary"},
|
|
{"inform", OPT_INFORM, 'F', "Input format - DER or PEM"},
|
|
{"in", OPT_IN, '<', "Input file"},
|
|
{"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
|
|
{"out", OPT_OUT, '>', "Output file"},
|
|
{"text", OPT_TEXT, '-', "Print as text"},
|
|
{"C", OPT_C, '-', "Output C code"},
|
|
{"noout", OPT_NOOUT, '-', "No output"},
|
|
{"genkey", OPT_GENKEY, '-', "Generate a DSA key"},
|
|
OPT_R_OPTIONS,
|
|
# ifndef OPENSSL_NO_ENGINE
|
|
{"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
|
|
# endif
|
|
{NULL}
|
|
};
|
|
|
|
int dsaparam_main(int argc, char **argv)
|
|
{
|
|
ENGINE *e = NULL;
|
|
DSA *dsa = NULL;
|
|
BIO *in = NULL, *out = NULL;
|
|
BN_GENCB *cb = NULL;
|
|
int numbits = -1, num = 0, genkey = 0;
|
|
int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0, C = 0;
|
|
int ret = 1, i, text = 0, private = 0;
|
|
char *infile = NULL, *outfile = NULL, *prog;
|
|
OPTION_CHOICE o;
|
|
|
|
prog = opt_init(argc, argv, dsaparam_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(dsaparam_options);
|
|
ret = 0;
|
|
goto end;
|
|
case OPT_INFORM:
|
|
if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
|
|
goto opthelp;
|
|
break;
|
|
case OPT_IN:
|
|
infile = opt_arg();
|
|
break;
|
|
case OPT_OUTFORM:
|
|
if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
|
|
goto opthelp;
|
|
break;
|
|
case OPT_OUT:
|
|
outfile = opt_arg();
|
|
break;
|
|
case OPT_ENGINE:
|
|
e = setup_engine(opt_arg(), 0);
|
|
break;
|
|
case OPT_TEXT:
|
|
text = 1;
|
|
break;
|
|
case OPT_C:
|
|
C = 1;
|
|
break;
|
|
case OPT_GENKEY:
|
|
genkey = 1;
|
|
break;
|
|
case OPT_R_CASES:
|
|
if (!opt_rand(o))
|
|
goto end;
|
|
break;
|
|
case OPT_NOOUT:
|
|
noout = 1;
|
|
break;
|
|
}
|
|
}
|
|
argc = opt_num_rest();
|
|
argv = opt_rest();
|
|
|
|
if (argc == 1) {
|
|
if (!opt_int(argv[0], &num) || num < 0)
|
|
goto end;
|
|
/* generate a key */
|
|
numbits = num;
|
|
}
|
|
private = genkey ? 1 : 0;
|
|
|
|
in = bio_open_default(infile, 'r', informat);
|
|
if (in == NULL)
|
|
goto end;
|
|
out = bio_open_owner(outfile, outformat, private);
|
|
if (out == NULL)
|
|
goto end;
|
|
|
|
if (numbits > 0) {
|
|
if (numbits > OPENSSL_DSA_MAX_MODULUS_BITS)
|
|
BIO_printf(bio_err,
|
|
"Warning: It is not recommended to use more than %d bit for DSA keys.\n"
|
|
" Your key size is %d! Larger key size may behave not as expected.\n",
|
|
OPENSSL_DSA_MAX_MODULUS_BITS, numbits);
|
|
|
|
cb = BN_GENCB_new();
|
|
if (cb == NULL) {
|
|
BIO_printf(bio_err, "Error allocating BN_GENCB object\n");
|
|
goto end;
|
|
}
|
|
BN_GENCB_set(cb, dsa_cb, bio_err);
|
|
dsa = DSA_new();
|
|
if (dsa == NULL) {
|
|
BIO_printf(bio_err, "Error allocating DSA object\n");
|
|
goto end;
|
|
}
|
|
BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n",
|
|
num);
|
|
BIO_printf(bio_err, "This could take some time\n");
|
|
if (!DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL, cb)) {
|
|
ERR_print_errors(bio_err);
|
|
BIO_printf(bio_err, "Error, DSA key generation failed\n");
|
|
goto end;
|
|
}
|
|
} else if (informat == FORMAT_ASN1) {
|
|
dsa = d2i_DSAparams_bio(in, NULL);
|
|
} else {
|
|
dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
|
|
}
|
|
if (dsa == NULL) {
|
|
BIO_printf(bio_err, "unable to load DSA parameters\n");
|
|
ERR_print_errors(bio_err);
|
|
goto end;
|
|
}
|
|
|
|
if (text) {
|
|
DSAparams_print(out, dsa);
|
|
}
|
|
|
|
if (C) {
|
|
const BIGNUM *p = NULL, *q = NULL, *g = NULL;
|
|
unsigned char *data;
|
|
int len, bits_p;
|
|
|
|
DSA_get0_pqg(dsa, &p, &q, &g);
|
|
len = BN_num_bytes(p);
|
|
bits_p = BN_num_bits(p);
|
|
|
|
data = app_malloc(len + 20, "BN space");
|
|
|
|
BIO_printf(bio_out, "DSA *get_dsa%d()\n{\n", bits_p);
|
|
print_bignum_var(bio_out, p, "dsap", len, data);
|
|
print_bignum_var(bio_out, q, "dsaq", len, data);
|
|
print_bignum_var(bio_out, g, "dsag", len, data);
|
|
BIO_printf(bio_out, " DSA *dsa = DSA_new();\n"
|
|
"\n");
|
|
BIO_printf(bio_out, " if (dsa == NULL)\n"
|
|
" return NULL;\n");
|
|
BIO_printf(bio_out, " dsa->p = BN_bin2bn(dsap_%d, sizeof(dsap_%d), NULL);\n",
|
|
bits_p, bits_p);
|
|
BIO_printf(bio_out, " dsa->q = BN_bin2bn(dsaq_%d, sizeof(dsaq_%d), NULL);\n",
|
|
bits_p, bits_p);
|
|
BIO_printf(bio_out, " dsa->g = BN_bin2bn(dsag_%d, sizeof(dsag_%d), NULL);\n",
|
|
bits_p, bits_p);
|
|
BIO_printf(bio_out, " if (!dsa->p || !dsa->q || !dsa->g) {\n"
|
|
" DSA_free(dsa);\n"
|
|
" return NULL;\n"
|
|
" }\n"
|
|
" return(dsa);\n}\n");
|
|
OPENSSL_free(data);
|
|
}
|
|
|
|
if (outformat == FORMAT_ASN1 && genkey)
|
|
noout = 1;
|
|
|
|
if (!noout) {
|
|
if (outformat == FORMAT_ASN1)
|
|
i = i2d_DSAparams_bio(out, dsa);
|
|
else
|
|
i = PEM_write_bio_DSAparams(out, dsa);
|
|
if (!i) {
|
|
BIO_printf(bio_err, "unable to write DSA parameters\n");
|
|
ERR_print_errors(bio_err);
|
|
goto end;
|
|
}
|
|
}
|
|
if (genkey) {
|
|
DSA *dsakey;
|
|
|
|
if ((dsakey = DSAparams_dup(dsa)) == NULL)
|
|
goto end;
|
|
if (!DSA_generate_key(dsakey)) {
|
|
ERR_print_errors(bio_err);
|
|
DSA_free(dsakey);
|
|
goto end;
|
|
}
|
|
assert(private);
|
|
if (outformat == FORMAT_ASN1)
|
|
i = i2d_DSAPrivateKey_bio(out, dsakey);
|
|
else
|
|
i = PEM_write_bio_DSAPrivateKey(out, dsakey, NULL, NULL, 0, NULL,
|
|
NULL);
|
|
DSA_free(dsakey);
|
|
}
|
|
ret = 0;
|
|
end:
|
|
BN_GENCB_free(cb);
|
|
BIO_free(in);
|
|
BIO_free_all(out);
|
|
DSA_free(dsa);
|
|
release_engine(e);
|
|
return ret;
|
|
}
|
|
|
|
static int dsa_cb(int p, int n, BN_GENCB *cb)
|
|
{
|
|
char c = '*';
|
|
|
|
if (p == 0)
|
|
c = '.';
|
|
if (p == 1)
|
|
c = '+';
|
|
if (p == 2)
|
|
c = '*';
|
|
if (p == 3)
|
|
c = '\n';
|
|
BIO_write(BN_GENCB_get_arg(cb), &c, 1);
|
|
(void)BIO_flush(BN_GENCB_get_arg(cb));
|
|
return 1;
|
|
}
|
|
#endif
|