diff options
author | Ulf Möller <ulf@openssl.org> | 2000-01-27 19:31:26 +0000 |
---|---|---|
committer | Ulf Möller <ulf@openssl.org> | 2000-01-27 19:31:26 +0000 |
commit | 38e33cef15e7965ad9fd9db4b08fb2f5dc1bc573 (patch) | |
tree | 27216af3df8adcdc381475ca7011f43fcf34e7fe /doc/crypto/BN_rand.pod | |
parent | 0c23524963064a3bf8206b28c97f88e157d29fa7 (diff) |
Document DSA and SHA.
New function BN_pseudo_rand().
Use BN_prime_checks_size(BN_num_bits(w)) rounds of Miller-Rabin when
generating DSA primes (why not use BN_is_prime()?)
Diffstat (limited to 'doc/crypto/BN_rand.pod')
-rw-r--r-- | doc/crypto/BN_rand.pod | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/doc/crypto/BN_rand.pod b/doc/crypto/BN_rand.pod index 0f692684d2..47991b1abc 100644 --- a/doc/crypto/BN_rand.pod +++ b/doc/crypto/BN_rand.pod @@ -2,7 +2,7 @@ =head1 NAME -BN_rand - Generate pseudo-random number +BN_rand, BN_rand_pseudo - Generate pseudo-random number =head1 SYNOPSIS @@ -10,6 +10,8 @@ BN_rand - Generate pseudo-random number int BN_rand(BIGNUM *rnd, int bits, int top, int bottom); + int BN_pseudo_rand(BIGNUM *rnd, int bits, int top,int bottom); + =head1 DESCRIPTION BN_rand() generates a cryptographically strong pseudo-random number of @@ -18,11 +20,16 @@ two most significant bits of the number will be set to 1, so that the product of two such random numbers will always have 2*B<bits> length. If B<bottom> is true, the number will be odd. +BN_pseudo_rand() does the same, but pseudo-random numbers generated by +this function are not necessarily unpredictable. They can be used for +non-cryptographic purposes and for certain purposes in cryptographic +protocols, but usually not for key generation etc. + The PRNG must be seeded prior to calling BN_rand(). =head1 RETURN VALUES -BN_rand() returns 1 on success, 0 on error. +BN_rand() and BN_pseudo_rand() return 1 on success, 0 on error. The error codes can be obtained by L<ERR_get_error(3)|ERR_get_error(3)>. =head1 SEE ALSO @@ -33,5 +40,6 @@ L<RAND_add(3)|RAND_add(3)>, L<RAND_bytes(3)|RAND_bytes(3)> =head1 HISTORY BN_rand() is available in all versions of SSLeay and OpenSSL. +BN_pseudo_rand() was added in OpenSSL 0.9.5. =cut |