(including another problem in the s3_srvr.c state machine).
Changes between 0.9.4 and 0.9.5 [xx XXX 2000]
+ *) Bugfix: ssl3_send_server_key_exchange was not restartable
+ (the state was not changed to SSL3_ST_SW_KEY_EXCH_B, and because of
+ this the server could overwrite ephemeral keys that the client
+ has already seen).
+ [Bodo Moeller]
+
+ *) Turn DSA_is_prime into a macro that calls BN_is_prime,
+ using 50 iterations of the Rabin-Miller test.
+
+ DSA_generate_parameters now uses BN_is_prime_fasttest (with 50
+ iterations of the Rabin-Miller test as required by the appendix
+ to FIPS PUB 186[-1]) instead of DSA_is_prime.
+ As BN_is_prime_fasttest includes trial division, DSA parameter
+ generation becomes much faster.
+
+ This implies a change for the callback functions in DSA_is_prime
+ and DSA_generate_parameters: They are now called once for each
+ positive witness in the Rabin-Miller test, not just occasionally
+ in the inner loop; and the parameters to the callback function now
+ provide an iteration count for the outer loop rather than for the
+ current invocation of the inner loop.
+ [Bodo Moeller]
+
+ *) New functions BN_is_prime_fasttest that optionally does trial
+ division before starting the Rabin-Miller test and has
+ an additional BN_CTX * argument (whereas BN_is_prime always
+ has to allocate at least one BN_CTX).
+ [Bodo Moeller]
+
*) Fix for bug in CRL encoding. The validity dates weren't being handled
as ASN1_TIME.
[Steve Henson]
*) New -pkcs12 option to CA.pl script to write out a PKCS#12 file.
[Steve Henson]
- *) Use BN_prime_checks_size(BN_num_bits(w)) rounds of Miller-Rabin when
- generating DSA primes.
- [Ulf Möller]
-
*) New function BN_pseudo_rand().
[Ulf Möller]
*) Make BN_generate_prime() return NULL on error if ret!=NULL.
[Ulf Möller]
- *) Retain source code compatibility for BN_prime_checks macro.
+ *) Retain source code compatibility for BN_prime_checks macro:
+ BN_is_prime(..., BN_prime_checks, ...) now uses
+ BN_prime_checks_for_size to determine the appropriate number of
+ Rabin-Miller iterations.
[Ulf Möller]
*) Diffie-Hellman uses "safe" primes: DH_check() return code renamed to
*) Do more iterations of Rabin-Miller probable prime test (specifically,
3 for 1024-bit primes, 6 for 512-bit primes, 12 for 256-bit primes
- instead of only 2 for all lengths; see BN_prime_checks_size definition
+ instead of only 2 for all lengths; see BN_prime_checks_for_size definition
in crypto/bn/bn_prime.c for the complete table). This guarantees a
- false-positive rate of at most 2^-80 (actually less because we are
- additionally doing trial division) for random input.
+ false-positive rate of at most 2^-80 for random input.
[Bodo Moeller]
*) Rewrite ssl3_read_n (ssl/s3_pkt.c) avoiding a couple of bugs.
$rmd160_obj = asm/rm86-elf.o
$rc5_obj = asm/r586-elf.o
+*** debug-levitte-linux-elf
+$cc = gcc
+$cflags = -DRL_DEBUG -DREF_CHECK -DCRYPTO_MDEBUG -DNO_ASM -DL_ENDIAN -DTERMIO -D_POSIX_SOURCE -ggdb -g3 -m486 -pedantic -ansi -Wall -Wshadow -Wid-clash-31 -pipe
+$unistd =
+$thread_cflag = -D_REENTRANT
+$lflags =
+$bn_ops =
+$bn_obj =
+$des_obj =
+$bf_obj =
+$md5_obj =
+$sha1_obj =
+$cast_obj =
+$rc4_obj =
+$rmd160_obj =
+$rc5_obj =
+
*** debug-linux-elf
$cc = gcc
$cflags = -DREF_CHECK -DCRYPTO_MDEBUG -DL_ENDIAN -DTERMIO -g -m486 -Wall
* of Applied Cryptography [Menezes, van Oorschot, Vanstone; CRC Press 1996];
* original paper: Damgaard, Landrock, Pomerance: Average case error estimates
* for the strong probable prime test. -- Math. Comp. 61 (1993) 177-194) */
-#define BN_prime_checks_size(b) ((b) >= 1300 ? 2 : \
+#define BN_prime_checks_for_size(b) ((b) >= 1300 ? 2 : \
(b) >= 850 ? 3 : \
(b) >= 650 ? 4 : \
(b) >= 550 ? 5 : \
BIGNUM *rem,void (*callback)(int,int,void *),void *cb_arg);
int BN_is_prime(BIGNUM *p,int nchecks,void (*callback)(int,int,void *),
BN_CTX *ctx,void *cb_arg);
+int BN_is_prime_fasttest(BIGNUM *p,int nchecks,
+ void (*callback)(int,int,void *),
+ BN_CTX *ctx,BN_CTX *ctx2,void *cb_arg,
+ int do_trial_division);
void ERR_load_BN_strings(void );
BN_ULONG bn_mul_add_words(BN_ULONG *rp, BN_ULONG *ap, int num, BN_ULONG w);
int found=0;
int i,j,c1=0;
BN_CTX *ctx;
- int checks = BN_prime_checks_size(bits);
+ int checks = BN_prime_checks_for_size(bits);
ctx=BN_CTX_new();
if (ctx == NULL) goto err;
return(found ? rnd : NULL);
}
-int BN_is_prime(BIGNUM *a, int checks, void (*callback)(int,int,void *),
- BN_CTX *ctx_passed, void *cb_arg)
+int BN_is_prime_fasttest(BIGNUM *a, int checks,
+ void (*callback)(int,int,void *),
+ BN_CTX *ctx_passed, BN_CTX *ctx2_passed, void *cb_arg,
+ int do_trial_division)
{
- int i,j,c2=0,ret= -1;
+ int i,j,ret= -1;
BIGNUM *check;
BN_CTX *ctx=NULL,*ctx2=NULL;
BN_MONT_CTX *mont=NULL;
if (checks == BN_prime_checks)
{
int bits = BN_num_bits(a);
- checks = BN_prime_checks_size(bits);
+ checks = BN_prime_checks_for_size(bits);
}
if (!BN_is_odd(a))
return(0);
+ if (do_trial_division)
+ for (i = 1; i < NUMPRIMES; i++)
+ if (BN_mod_word(a, primes[i]) == 0)
+ return 0;
+
if (ctx_passed != NULL)
ctx=ctx_passed;
else
if ((ctx=BN_CTX_new()) == NULL) goto err;
+ if (ctx2_passed != NULL)
+ ctx2=ctx2_passed;
+ else
+ if ((ctx2=BN_CTX_new()) == NULL) goto err;
- if ((ctx2=BN_CTX_new()) == NULL) goto err;
if ((mont=BN_MONT_CTX_new()) == NULL) goto err;
check= &(ctx->bn[ctx->tos++]);
for (i=0; i<checks; i++)
{
- if (!BN_pseudo_rand(check,BN_num_bits(a)-1,0,0)) goto err;
+ if (!BN_pseudo_rand(check,BN_num_bits(a),0,0)) goto err;
+ if (BN_cmp(check, a) >= 0)
+ BN_sub(check, check, a);
j=witness(check,a,ctx,ctx2,mont);
if (j == -1) goto err;
if (j)
ret=0;
goto err;
}
- if (callback != NULL) callback(1,c2++,cb_arg);
+ if (callback != NULL) callback(1,i,cb_arg);
}
ret=1;
err:
ctx->tos--;
if ((ctx_passed == NULL) && (ctx != NULL))
BN_CTX_free(ctx);
- if (ctx2 != NULL)
+ if ((ctx2_passed == NULL) && (ctx2 != NULL))
BN_CTX_free(ctx2);
if (mont != NULL) BN_MONT_CTX_free(mont);
return(ret);
}
+int BN_is_prime(BIGNUM *a, int checks, void (*callback)(int,int,void *),
+ BN_CTX *ctx_passed, void *cb_arg)
+ {
+ return BN_is_prime_fasttest(a, checks, callback, ctx_passed, NULL, cb_arg, 0);
+ }
+
static int witness(BIGNUM *a, BIGNUM *n, BN_CTX *ctx, BN_CTX *ctx2,
BN_MONT_CTX *mont)
{
static int probable_prime(BIGNUM *rnd, int bits)
{
int i;
- MS_STATIC BN_ULONG mods[NUMPRIMES];
+ BN_ULONG mods[NUMPRIMES];
BN_ULONG delta,d;
again:
int DSA_print_fp(FILE *bp, DSA *x, int off);
#endif
-int DSA_is_prime(BIGNUM *q,void (*callback)(),void *cb_arg);
+#define DSS_prime_checks 50
+/* Primality test according to FIPS PUB 186[-1], Appendix 2.1:
+ * 50 rounds of Rabin-Miller */
+#define DSA_is_prime(n, callback, cb_arg) \
+ BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg)
#ifndef NO_DH
/* Convert DSA structure (key or just parameters) into DH structure
#define DSA_F_DSAPARAMS_PRINT_FP 101
#define DSA_F_DSA_DO_SIGN 112
#define DSA_F_DSA_DO_VERIFY 113
-#define DSA_F_DSA_IS_PRIME 102
#define DSA_F_DSA_NEW 103
#define DSA_F_DSA_PRINT 104
#define DSA_F_DSA_PRINT_FP 105
{ERR_PACK(0,DSA_F_DSAPARAMS_PRINT_FP,0), "DSAparams_print_fp"},
{ERR_PACK(0,DSA_F_DSA_DO_SIGN,0), "DSA_do_sign"},
{ERR_PACK(0,DSA_F_DSA_DO_VERIFY,0), "DSA_do_verify"},
-{ERR_PACK(0,DSA_F_DSA_IS_PRIME,0), "DSA_is_prime"},
{ERR_PACK(0,DSA_F_DSA_NEW,0), "DSA_new"},
{ERR_PACK(0,DSA_F_DSA_PRINT,0), "DSA_print"},
{ERR_PACK(0,DSA_F_DSA_PRINT_FP,0), "DSA_print_fp"},
#undef GENUINE_DSA
#ifdef GENUINE_DSA
+/* Parameter generation follows the original release of FIPS PUB 186,
+ * Appendix 2.2 (i.e. use SHA as defined in FIPS PUB 180) */
#define HASH SHA
#else
+/* Parameter generation follows the updated Appendix 2.2 for FIPS PUB 186,
+ * also Appendix 2.2 of FIPS PUB 186-1 (i.e. use SHA as defined in
+ * FIPS PUB 180-1) */
#define HASH SHA1
#endif
#ifndef NO_SHA
+
#include <stdio.h>
#include <time.h>
#include "cryptlib.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)(),
- void *cb_arg)
+ int *counter_ret, unsigned long *h_ret, void (*callback)(),
+ void *cb_arg)
{
int ok=0;
unsigned char seed[SHA_DIGEST_LENGTH];
BN_MONT_CTX *mont=NULL;
int k,n=0,i,b,m=0;
int counter=0;
- BN_CTX *ctx=NULL,*ctx2=NULL;
+ int r=0;
+ BN_CTX *ctx=NULL,*ctx2=NULL,*ctx3=NULL,*ctx4=NULL;
unsigned int h=2;
DSA *ret=NULL;
if (bits < 512) bits=512;
bits=(bits+63)/64*64;
- if (seed_len < 20) seed_in = NULL;
+ if (seed_len < 20)
+ seed_in = NULL; /* seed buffer too small -- ignore */
+ if (seed_len > 20)
+ seed_len = 20; /* App. 2.2 of FIPS PUB 186 allows larger SEED,
+ * but our internal buffers are restricted to 160 bits*/
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 ((ctx3=BN_CTX_new()) == NULL) goto err;
+ if ((ctx4=BN_CTX_new()) == NULL) goto err;
if ((ret=DSA_new()) == NULL) goto err;
if ((mont=BN_MONT_CTX_new()) == NULL) goto err;
for (;;)
{
- for (;;)
+ for (;;) /* find q */
{
+ int seed_is_random = 0;
+
/* step 1 */
if (callback != NULL) callback(0,m++,cb_arg);
if (!seed_len)
+ {
RAND_pseudo_bytes(seed,SHA_DIGEST_LENGTH);
+ seed_is_random = 1;
+ }
else
+ /* use random seed if 'seed_in' turns out to be bad */
seed_len=0;
-
memcpy(buf,seed,SHA_DIGEST_LENGTH);
memcpy(buf2,seed,SHA_DIGEST_LENGTH);
+ /* precompute "SEED + 1" for step 7: */
for (i=SHA_DIGEST_LENGTH-1; i >= 0; i--)
{
buf[i]++;
if (!BN_bin2bn(md,SHA_DIGEST_LENGTH,q)) goto err;
/* step 4 */
- if (BN_is_prime(q,BN_prime_checks,callback,NULL,cb_arg) > 0) break;
+ r = BN_is_prime_fasttest(q, DSS_prime_checks, callback, ctx3, ctx4, cb_arg, seed_is_random);
+ if (r > 0)
+ break;
+ if (r != 0)
+ goto err;
+
/* do a callback call */
/* step 5 */
}
/* step 6 */
counter=0;
+ /* "offset = 2" */
n=(bits-1)/160;
b=(bits-1)-n*160;
for (;;)
{
+ if (callback != NULL && counter != 0)
+ callback(0,counter,cb_arg);
+
/* step 7 */
BN_zero(W);
+ /* now 'buf' contains "SEED + offset - 1" */
for (k=0; k<=n; k++)
{
+ /* obtain "SEED + offset + k" by incrementing: */
for (i=SHA_DIGEST_LENGTH-1; i >= 0; i--)
{
buf[i]++;
if (BN_cmp(p,test) >= 0)
{
/* step 11 */
- if (BN_is_prime(p,BN_prime_checks,callback,NULL,cb_arg) > 0)
- goto end;
+ r = BN_is_prime_fasttest(p, DSS_prime_checks, callback, ctx3, ctx4, cb_arg, 1);
+ if (r > 0)
+ goto end; /* found it */
+ if (r != 0)
+ goto err;
}
/* step 13 */
counter++;
+ /* "offset = offset + n + 1" */
/* step 14 */
if (counter >= 4096) break;
-
- if (callback != NULL) callback(0,counter,cb_arg);
}
}
end:
if (h_ret != NULL) *h_ret=h;
}
if (ctx != NULL) BN_CTX_free(ctx);
- if (ctx != NULL) BN_CTX_free(ctx2);
+ if (ctx2 != NULL) BN_CTX_free(ctx2);
+ if (ctx3 != NULL) BN_CTX_free(ctx3);
+ if (ctx4 != NULL) BN_CTX_free(ctx4);
if (mont != NULL) BN_MONT_CTX_free(mont);
return(ok?ret:NULL);
}
-
-int DSA_is_prime(BIGNUM *w, void (*callback)(), void *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_odd(w)) 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=BN_prime_checks_size(BN_num_bits(w));
-
- /* 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 */
- if (!BN_pseudo_rand(b,BN_num_bits(w)-2/*-1*/,0,0))
- goto err;
- /* 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);
- }
#endif
#endif
static void MS_CALLBACK dsa_cb(int p, int n, char *arg);
+
+/* seed, out_p, out_q, out_g are taken from the updated Appendix 5 to
+ * FIPS PUB 186 and also appear in Appendix 5 to FIPS PIB 186-1 */
static unsigned char seed[20]={
0xd5,0x01,0x4e,0x4b,0x60,0xef,0x2b,0xa8,0xb6,0x21,0x1b,0x40,
0x62,0xba,0x32,0x24,0xe0,0x42,0x7d,0xd3,
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
BIO_printf(bio_err,"test generation of DSA parameters\n");
- BIO_printf(bio_err,"expect '.*' followed by 3 lines of '.'s and '+'s\n");
- dsa=DSA_generate_parameters(512,seed,20,&counter,&h,dsa_cb,
- (char *)bio_err);
+
+ dsa=DSA_generate_parameters(512,seed,20,&counter,&h,dsa_cb,(char *)bio_err);
BIO_printf(bio_err,"seed\n");
for (i=0; i<20; i+=4)
extern "C" {
#endif
-#if defined(NO_SHA) || defined(NO_SHA0) || defined(NO_SHA1)
+#if defined(NO_SHA) || (defined(NO_SHA0) && defined(NO_SHA1))
#error SHA is disabled.
#endif
B<bits> is the length of the prime to be generated; the DSS allows a
maximum of 1024 bits.
-If B<seed> is NULL or B<seed_len> E<lt> 20, the primes will be
+If B<seed> is B<NULL> or B<seed_len> E<lt> 20, the primes will be
generated at random. Otherwise, the seed is used to generate
them. If the given seed does not yield a prime q, a new random
seed is chosen and placed at B<seed>.
DSA_generate_parameters() places the iteration count in
*B<counter_ret> and a counter used for finding a generator in
-*B<h_ret>, unless these are NULL.
+*B<h_ret>, unless these are B<NULL>.
A callback function may be used to provide feedback about the progress
of the key generation. If B<callback> is not B<NULL>, it will be
=item *
-When the the m-th candidate for q is generated, B<callback(0, m,
-cb_arg)> is called.
+When a candidate for q is generated, B<callback(0, m++, cb_arg)> is called
+(m is 0 for the first candidate).
=item *
-B<callback(1, j++, cb_arg)> is called in the inner loop of the
-Miller-Rabin primality test.
+While a candidate for q is tested, B<callback(1, i, cb_arg)>
+is called in the outer loop of the Miller-Rabin primality tests
+(once for each witness that confirms that the candidate may be prime).
+i is the loop counter (starting at 0).
=item *
=item *
-While candidates for p are being tested, B<callback(1, j++, cb_arg)>
-is called in the inner loop of the Miller-Rabin primality test, then
-B<callback(0, counter, cb_arg)> is called when the next candidate
-is chosen.
+Before a candidate for p (other than the first) is generated and tested,
+B<callback(0, counter, cb_arg)> is called.
+
+=item *
+
+While a candidate for p is tested, B<callback(1, j++, cb_arg)>
+is called in the outer loop of the Miller-Rabin primality test
+(once for each witness that confirms that the candidate may be prime).
+i is the loop counter (starting at 0).
=item *
=head1 RETURN VALUE
DSA_generate_parameters() returns a pointer to the DSA structure, or
-NULL if the parameter generation fails. The error codes can be
+B<NULL> if the parameter generation fails. The error codes can be
obtained by L<ERR_get_error(3)|ERR_get_error(3)>.
=head1 BUGS
-The deterministic generation of p does not follow the NIST algorithm:
-r0 is SHA1(s+k+1), but should be SHA1(s+j+k) with j_0=2,
-j_counter=j_counter-1 + n + 1.
-
Seed lengths E<gt> 20 are not supported.
=head1 SEE ALSO
DSA_generate_parameters() appeared in SSLeay 0.8. The B<cb_arg>
argument was added in SSLeay 0.9.0.
-
+In versions up to OpenSSL 0.9.4, B<callback(1, ...)> was called
+in the inner loop of the Miller-Rabin test whenever it reached the
+squaring step (the parameters to B<callback> did not reveal how many
+witnesses had been tested); since OpenSSL 0.9.5, B<callback(1, ...)>
+is called as in BN_is_prime(3), i.e. once for each witness.
=cut
ssltest -bio_pair -ssl2\r
if errorlevel 1 goto done\r
\r
+echo test sslv2/sslv3 with 1024 bit DHE via BIO pair\r
+ssltest -bio_pair -dhe1024 -v\r
+if errorlevel 1 goto done\r
+\r
echo test sslv2 with server authentication via BIO pair\r
ssltest -bio_pair -ssl2 -server_auth -CAfile cert.tmp\r
if errorlevel 1 goto done\r
SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
goto f_err;
}
+
+ if (s->s3->tmp.dh != NULL)
+ {
+ DH_free(dh);
+ SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, SSL_R_INTERNAL_ERROR);
+ goto err;
+ }
+
if ((dh=DHparams_dup(dhp)) == NULL)
{
SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
s->init_off=0;
}
- /* SSL3_ST_SW_KEY_EXCH_B */
+ s->state = SSL3_ST_SW_KEY_EXCH_B;
return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
f_err:
ssl3_send_alert(s,SSL3_AL_FATAL,al);
../apps/openssl verify -CApath ../certs ../certs/*.pem
test_dh:
- @echo "Generate as set of DH parameters"
+ @echo "Generate a set of DH parameters"
./$(DHTEST)
test_dsa:
- @echo "Generate as set of DSA parameters"
+ @echo "Generate a set of DSA parameters"
./$(DSATEST)
+ ./$(DSATEST) -app2_1
test_gen:
@echo "Generate and verify a certificate request"
echo test sslv2/sslv3 w/o DHE via BIO pair
./ssltest -bio_pair -no_dhe || exit 1
+echo test sslv2/sslv3 with 1024bit DHE
+./ssltest -bio_pair -dhe1024 -v || exit 1
+
echo test sslv2/sslv3 with server authentication
./ssltest -bio_pair -server_auth -CApath ../certs || exit 1
sk_CRYPTO_EX_DATA_FUNCS_pop_free 2236
sk_CRYPTO_EX_DATA_FUNCS_insert 2237
sk_CRYPTO_EX_DATA_FUNCS_zero 2238
+BN_pseudo_rand 2239
+BN_is_prime_fasttest 2240
projects / openssl.git / commitdiff