diff options
Diffstat (limited to 'crypto/openssl/doc/crypto/RAND_set_rand_method.pod')
| -rw-r--r-- | crypto/openssl/doc/crypto/RAND_set_rand_method.pod | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/crypto/openssl/doc/crypto/RAND_set_rand_method.pod b/crypto/openssl/doc/crypto/RAND_set_rand_method.pod deleted file mode 100644 index c9bb6d9..0000000 --- a/crypto/openssl/doc/crypto/RAND_set_rand_method.pod +++ /dev/null @@ -1,83 +0,0 @@ -=pod - -=head1 NAME - -RAND_set_rand_method, RAND_get_rand_method, RAND_SSLeay - select RAND method - -=head1 SYNOPSIS - - #include <openssl/rand.h> - - void RAND_set_rand_method(const RAND_METHOD *meth); - - const RAND_METHOD *RAND_get_rand_method(void); - - RAND_METHOD *RAND_SSLeay(void); - -=head1 DESCRIPTION - -A B<RAND_METHOD> specifies the functions that OpenSSL uses for random number -generation. By modifying the method, alternative implementations such as -hardware RNGs may be used. IMPORTANT: See the NOTES section for important -information about how these RAND API functions are affected by the use of -B<ENGINE> API calls. - -Initially, the default RAND_METHOD is the OpenSSL internal implementation, as -returned by RAND_SSLeay(). - -RAND_set_default_method() makes B<meth> the method for PRNG use. B<NB>: This is -true only whilst no ENGINE has been set as a default for RAND, so this function -is no longer recommended. - -RAND_get_default_method() returns a pointer to the current RAND_METHOD. -However, the meaningfulness of this result is dependant on whether the ENGINE -API is being used, so this function is no longer recommended. - -=head1 THE RAND_METHOD STRUCTURE - - typedef struct rand_meth_st - { - void (*seed)(const void *buf, int num); - int (*bytes)(unsigned char *buf, int num); - void (*cleanup)(void); - void (*add)(const void *buf, int num, int entropy); - int (*pseudorand)(unsigned char *buf, int num); - int (*status)(void); - } RAND_METHOD; - -The components point to the implementation of RAND_seed(), -RAND_bytes(), RAND_cleanup(), RAND_add(), RAND_pseudo_rand() -and RAND_status(). -Each component may be NULL if the function is not implemented. - -=head1 RETURN VALUES - -RAND_set_rand_method() returns no value. RAND_get_rand_method() and -RAND_SSLeay() return pointers to the respective methods. - -=head1 NOTES - -As of version 0.9.7, RAND_METHOD implementations are grouped together with other -algorithmic APIs (eg. RSA_METHOD, EVP_CIPHER, etc) in B<ENGINE> modules. If a -default ENGINE is specified for RAND functionality using an ENGINE API function, -that will override any RAND defaults set using the RAND API (ie. -RAND_set_rand_method()). For this reason, the ENGINE API is the recommended way -to control default implementations for use in RAND and other cryptographic -algorithms. - -=head1 SEE ALSO - -L<rand(3)|rand(3)>, L<engine(3)|engine(3)> - -=head1 HISTORY - -RAND_set_rand_method(), RAND_get_rand_method() and RAND_SSLeay() are -available in all versions of OpenSSL. - -In the engine version of version 0.9.6, RAND_set_rand_method() was altered to -take an ENGINE pointer as its argument. As of version 0.9.7, that has been -reverted as the ENGINE API transparently overrides RAND defaults if used, -otherwise RAND API functions work as before. RAND_set_rand_engine() was also -introduced in version 0.9.7. - -=cut |
