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Simplify BN_rand_range

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This commit is contained in:
Bodo Möller 2001-02-10 00:34:02 +00:00
parent 836f996010
commit e306892994
5 changed files with 8 additions and 13 deletions
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2
crypto/bn/bn.h
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@ -329,7 +329,7 @@ BIGNUM *BN_CTX_get(BN_CTX *ctx);
void BN_CTX_end(BN_CTX *ctx);
int BN_rand(BIGNUM *rnd, int bits, int top,int bottom);
int BN_pseudo_rand(BIGNUM *rnd, int bits, int top,int bottom);
int BN_rand_range(BIGNUM *rnd, BIGNUM *min, BIGNUM *range);
int BN_rand_range(BIGNUM *rnd, BIGNUM *range);
int BN_num_bits(const BIGNUM *a);
int BN_num_bits_word(BN_ULONG);
BIGNUM *BN_new(void);

10
crypto/bn/bn_rand.c
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@ -169,8 +169,9 @@ int BN_bntest_rand(BIGNUM *rnd, int bits, int top, int bottom)
}
#endif
/* random number r: min <= r < min+range */
int BN_rand_range(BIGNUM *r, BIGNUM *min, BIGNUM *range)
/* random number r: 0 <= r < range */
int BN_rand_range(BIGNUM *r, BIGNUM *range)
{
int n;
@ -217,10 +218,5 @@ int BN_rand_range(BIGNUM *r, BIGNUM *min, BIGNUM *range)
while (BN_cmp(r, range) >= 0);
}
if (min != NULL)
{
if (!BN_add(r, r, min)) return 0;
}
return 1;
}

2
crypto/dsa/dsa_ossl.c
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@ -181,7 +181,7 @@ static int dsa_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp)
/* Get random k */
do
if (!BN_rand_range(&k, NULL, dsa->q)) goto err;
if (!BN_rand_range(&k, dsa->q)) goto err;
while (BN_is_zero(&k));
if ((dsa->method_mont_p == NULL) && (dsa->flags & DSA_FLAG_CACHE_MONT_P))

5
doc/crypto/BN_rand.pod
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@ -12,7 +12,7 @@ BN_rand, BN_pseudo_rand - generate pseudo-random number
int BN_pseudo_rand(BIGNUM *rnd, int bits, int top, int bottom);
int BN_rand_range(BIGNUM *rnd, BIGNUM *min, BIGNUM *range);
int BN_rand_range(BIGNUM *rnd, BIGNUM *range);
=head1 DESCRIPTION
@ -28,8 +28,7 @@ non-cryptographic purposes and for certain purposes in cryptographic
protocols, but usually not for key generation etc.
BN_rand_range() generates a cryptographically strong pseudo-random
number B<rnd> in the range B<min> E<lt>= B<rnd> E<lt> B<min> + B<range>.
B<min> may be NULL, in that case 0 E<lt>= B<rnd> E<lt> B<range>.
number B<rnd> in the range 0 <lt>= B<rnd> E<lt> B<range>.
The PRNG must be seeded prior to calling BN_rand() or BN_rand_range().

2
doc/crypto/bn.pod
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@ -68,7 +68,7 @@ bn - multiprecision integer arithmetics
int BN_rand(BIGNUM *rnd, int bits, int top, int bottom);
int BN_pseudo_rand(BIGNUM *rnd, int bits, int top, int bottom);
int BN_rand_range(BIGNUM *rnd, BIGNUM *min, BIGNUM *max);
int BN_rand_range(BIGNUM *rnd, BIGNUM *range);
BIGNUM *BN_generate_prime(BIGNUM *ret, int bits,int safe, BIGNUM *add,
BIGNUM *rem, void (*callback)(int, int, void *), void *cb_arg);