-/* crypto/dsa/dsa_gen.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
*
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * Licensed under the Apache License 2.0 (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
*/
-#undef GENUINE_DSA
-
-#ifdef GENUINE_DSA
-#define HASH SHA
-#else
-#define HASH SHA1
-#endif
+/*
+ * DSA low level APIs are deprecated for public use, but still ok for
+ * internal use.
+ */
+#include "internal/deprecated.h"
-#ifndef NO_SHA
+#include <openssl/opensslconf.h>
#include <stdio.h>
-#include <time.h>
-#include "cryptlib.h"
-#include <openssl/sha.h>
+#include "internal/cryptlib.h"
+#include <openssl/evp.h>
#include <openssl/bn.h>
-#include <openssl/dsa.h>
#include <openssl/rand.h>
-
-DSA *DSA_generate_parameters(int bits, unsigned char *seed_in, int seed_len,
- int *counter_ret, unsigned long *h_ret, void (*callback)(),
- char *cb_arg)
- {
- int ok=0;
- unsigned char seed[SHA_DIGEST_LENGTH];
- unsigned char md[SHA_DIGEST_LENGTH];
- unsigned char buf[SHA_DIGEST_LENGTH],buf2[SHA_DIGEST_LENGTH];
- BIGNUM *r0,*W,*X,*c,*test;
- BIGNUM *g=NULL,*q=NULL,*p=NULL;
- BN_MONT_CTX *mont=NULL;
- int k,n=0,i,b,m=0;
- int counter=0;
- BN_CTX *ctx=NULL,*ctx2=NULL;
- unsigned int h=2;
- DSA *ret=NULL;
-
- if (bits < 512) bits=512;
- bits=(bits+63)/64*64;
-
- if ((seed_in != NULL) && (seed_len == 20))
- memcpy(seed,seed_in,seed_len);
-
- if ((ctx=BN_CTX_new()) == NULL) goto err;
- if ((ctx2=BN_CTX_new()) == NULL) goto err;
- if ((ret=DSA_new()) == NULL) goto err;
-
- if ((mont=BN_MONT_CTX_new()) == NULL) goto err;
-
- r0= &(ctx2->bn[0]);
- g= &(ctx2->bn[1]);
- W= &(ctx2->bn[2]);
- q= &(ctx2->bn[3]);
- X= &(ctx2->bn[4]);
- c= &(ctx2->bn[5]);
- p= &(ctx2->bn[6]);
- test= &(ctx2->bn[7]);
-
- BN_lshift(test,BN_value_one(),bits-1);
-
- for (;;)
- {
- for (;;)
- {
- /* step 1 */
- if (callback != NULL) callback(0,m++,cb_arg);
-
- if (!seed_len)
- RAND_bytes(seed,SHA_DIGEST_LENGTH);
- else
- seed_len=0;
-
- memcpy(buf,seed,SHA_DIGEST_LENGTH);
- memcpy(buf2,seed,SHA_DIGEST_LENGTH);
- for (i=SHA_DIGEST_LENGTH-1; i >= 0; i--)
- {
- buf[i]++;
- if (buf[i] != 0) break;
- }
-
- /* step 2 */
- HASH(seed,SHA_DIGEST_LENGTH,md);
- HASH(buf,SHA_DIGEST_LENGTH,buf2);
- for (i=0; i<SHA_DIGEST_LENGTH; i++)
- md[i]^=buf2[i];
-
- /* step 3 */
- md[0]|=0x80;
- md[SHA_DIGEST_LENGTH-1]|=0x01;
- if (!BN_bin2bn(md,SHA_DIGEST_LENGTH,q)) abort();
-
- /* step 4 */
- if (DSA_is_prime(q,callback,cb_arg) > 0) break;
- /* do a callback call */
- /* step 5 */
- }
-
- if (callback != NULL) callback(2,0,cb_arg);
- if (callback != NULL) callback(3,0,cb_arg);
-
- /* step 6 */
- counter=0;
-
- n=(bits-1)/160;
- b=(bits-1)-n*160;
-
- for (;;)
- {
- /* step 7 */
- BN_zero(W);
- for (k=0; k<=n; k++)
- {
- for (i=SHA_DIGEST_LENGTH-1; i >= 0; i--)
- {
- buf[i]++;
- if (buf[i] != 0) break;
- }
-
- HASH(buf,SHA_DIGEST_LENGTH,md);
-
- /* step 8 */
- if (!BN_bin2bn(md,SHA_DIGEST_LENGTH,r0)) abort();
- BN_lshift(r0,r0,160*k);
- BN_add(W,W,r0);
- }
-
- /* more of step 8 */
- BN_mask_bits(W,bits-1);
- BN_copy(X,W); /* this should be ok */
- BN_add(X,X,test); /* this should be ok */
-
- /* step 9 */
- BN_lshift1(r0,q);
- BN_mod(c,X,r0,ctx);
- BN_sub(r0,c,BN_value_one());
- BN_sub(p,X,r0);
-
- /* step 10 */
- if (BN_cmp(p,test) >= 0)
- {
- /* step 11 */
- if (DSA_is_prime(p,callback,cb_arg) > 0)
- goto end;
- }
-
- /* step 13 */
- counter++;
-
- /* step 14 */
- if (counter >= 4096) break;
-
- if (callback != NULL) callback(0,counter,cb_arg);
- }
- }
-end:
- if (callback != NULL) callback(2,1,cb_arg);
-
- /* We now need to gernerate g */
- /* Set r0=(p-1)/q */
- BN_sub(test,p,BN_value_one());
- BN_div(r0,NULL,test,q,ctx);
-
- BN_set_word(test,h);
- BN_MONT_CTX_set(mont,p,ctx);
-
- for (;;)
- {
- /* g=test^r0%p */
- BN_mod_exp_mont(g,test,r0,p,ctx,mont);
- if (!BN_is_one(g)) break;
- BN_add(test,test,BN_value_one());
- h++;
- }
-
- if (callback != NULL) callback(3,1,cb_arg);
-
- ok=1;
-err:
- if (!ok)
- {
- if (ret != NULL) DSA_free(ret);
- }
- else
- {
- ret->p=BN_dup(p);
- ret->q=BN_dup(q);
- ret->g=BN_dup(g);
- if ((m > 1) && (seed_in != NULL)) memcpy(seed_in,seed,20);
- if (counter_ret != NULL) *counter_ret=counter;
- if (h_ret != NULL) *h_ret=h;
- }
- if (ctx != NULL) BN_CTX_free(ctx);
- if (ctx != NULL) BN_CTX_free(ctx2);
- if (mont != NULL) BN_MONT_CTX_free(mont);
- return(ok?ret:NULL);
- }
-
-int DSA_is_prime(BIGNUM *w, void (*callback)(), char *cb_arg)
- {
- int ok= -1,j,i,n;
- BN_CTX *ctx=NULL,*ctx2=NULL;
- BIGNUM *w_1,*b,*m,*z,*tmp,*mont_1;
- int a;
- BN_MONT_CTX *mont=NULL;
-
- if (!BN_is_bit_set(w,0)) return(0);
-
- if ((ctx=BN_CTX_new()) == NULL) goto err;
- if ((ctx2=BN_CTX_new()) == NULL) goto err;
- if ((mont=BN_MONT_CTX_new()) == NULL) goto err;
-
- m= &(ctx2->bn[2]);
- b= &(ctx2->bn[3]);
- z= &(ctx2->bn[4]);
- w_1= &(ctx2->bn[5]);
- tmp= &(ctx2->bn[6]);
- mont_1= &(ctx2->bn[7]);
-
- /* step 1 */
- n=50;
-
- /* step 2 */
- if (!BN_sub(w_1,w,BN_value_one())) goto err;
- for (a=1; !BN_is_bit_set(w_1,a); a++)
- ;
- if (!BN_rshift(m,w_1,a)) goto err;
-
- BN_MONT_CTX_set(mont,w,ctx);
- BN_to_montgomery(mont_1,BN_value_one(),mont,ctx);
- BN_to_montgomery(w_1,w_1,mont,ctx);
- for (i=1; i < n; i++)
- {
- /* step 3 */
- BN_rand(b,BN_num_bits(w)-2/*-1*/,0,0);
- /* BN_set_word(b,0x10001L); */
-
- /* step 4 */
- j=0;
- if (!BN_mod_exp_mont(z,b,m,w,ctx,mont)) goto err;
-
- if (!BN_to_montgomery(z,z,mont,ctx)) goto err;
-
- /* step 5 */
- for (;;)
- {
- if (((j == 0) && (BN_cmp(z,mont_1) == 0)) ||
- (BN_cmp(z,w_1) == 0))
- break;
-
- /* step 6 */
- if ((j > 0) && (BN_cmp(z,mont_1) == 0))
- {
- ok=0;
- goto err;
- }
-
- j++;
- if (j >= a)
- {
- ok=0;
- goto err;
- }
-
- if (!BN_mod_mul_montgomery(z,z,z,mont,ctx)) goto err;
- if (callback != NULL) callback(1,j,cb_arg);
- }
- }
-
- ok=1;
-err:
- if (ok == -1) DSAerr(DSA_F_DSA_IS_PRIME,ERR_R_BN_LIB);
- BN_CTX_free(ctx);
- BN_CTX_free(ctx2);
- BN_MONT_CTX_free(mont);
-
- return(ok);
- }
+#include <openssl/sha.h>
+#include "crypto/dsa.h"
+#include "dsa_local.h"
+
+int dsa_generate_ffc_parameters(DSA *dsa, int type, int pbits, int qbits,
+ BN_GENCB *cb)
+{
+ int ret = 0, res;
+
+#ifndef FIPS_MODULE
+ if (type == DSA_PARAMGEN_TYPE_FIPS_186_2)
+ ret = ffc_params_FIPS186_2_generate(dsa->libctx, &dsa->params,
+ FFC_PARAM_TYPE_DSA,
+ pbits, qbits, &res, cb);
+ else
+#endif
+ ret = ffc_params_FIPS186_4_generate(dsa->libctx, &dsa->params,
+ FFC_PARAM_TYPE_DSA,
+ pbits, qbits, &res, cb);
+ if (ret > 0)
+ dsa->dirty_cnt++;
+ return ret;
+}
+
+#ifndef FIPS_MODULE
+int DSA_generate_parameters_ex(DSA *dsa, int bits,
+ const unsigned char *seed_in, int seed_len,
+ int *counter_ret, unsigned long *h_ret,
+ BN_GENCB *cb)
+{
+ if (dsa->meth->dsa_paramgen)
+ return dsa->meth->dsa_paramgen(dsa, bits, seed_in, seed_len,
+ counter_ret, h_ret, cb);
+ if (seed_in != NULL
+ && !ffc_params_set_validate_params(&dsa->params, seed_in, seed_len, -1))
+ return 0;
+
+ /* The old code used FIPS 186-2 DSA Parameter generation */
+ if (bits <= 1024 && seed_len == 20) {
+ if (!dsa_generate_ffc_parameters(dsa, DSA_PARAMGEN_TYPE_FIPS_186_2,
+ bits, 160, cb))
+ return 0;
+ } else {
+ if (!dsa_generate_ffc_parameters(dsa, DSA_PARAMGEN_TYPE_FIPS_186_4,
+ bits, 0, cb))
+ return 0;
+ }
+
+ if (counter_ret != NULL)
+ *counter_ret = dsa->params.pcounter;
+ if (h_ret != NULL)
+ *h_ret = dsa->params.h;
+ return 1;
+}
#endif
projects / openssl.git / blobdiff