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author | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
commit | 3562e78743202e43aec8727005182a2558117eca (patch) | |
tree | 8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /openssl/doc/crypto/RSA_generate_key.pod | |
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Diffstat (limited to 'openssl/doc/crypto/RSA_generate_key.pod')
-rw-r--r-- | openssl/doc/crypto/RSA_generate_key.pod | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/openssl/doc/crypto/RSA_generate_key.pod b/openssl/doc/crypto/RSA_generate_key.pod new file mode 100644 index 000000000..52dbb14a5 --- /dev/null +++ b/openssl/doc/crypto/RSA_generate_key.pod @@ -0,0 +1,69 @@ +=pod + +=head1 NAME + +RSA_generate_key - generate RSA key pair + +=head1 SYNOPSIS + + #include <openssl/rsa.h> + + RSA *RSA_generate_key(int num, unsigned long e, + void (*callback)(int,int,void *), void *cb_arg); + +=head1 DESCRIPTION + +RSA_generate_key() generates a key pair and returns it in a newly +allocated B<RSA> structure. The pseudo-random number generator must +be seeded prior to calling RSA_generate_key(). + +The modulus size will be B<num> bits, and the public exponent will be +B<e>. Key sizes with B<num> E<lt> 1024 should be considered insecure. +The exponent is an odd number, typically 3, 17 or 65537. + +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 called as follows: + +=over 4 + +=item * + +While a random prime number is generated, it is called as +described in L<BN_generate_prime(3)|BN_generate_prime(3)>. + +=item * + +When the n-th randomly generated prime is rejected as not +suitable for the key, B<callback(2, n, cb_arg)> is called. + +=item * + +When a random p has been found with p-1 relatively prime to B<e>, +it is called as B<callback(3, 0, cb_arg)>. + +=back + +The process is then repeated for prime q with B<callback(3, 1, cb_arg)>. + +=head1 RETURN VALUE + +If key generation fails, RSA_generate_key() returns B<NULL>; the +error codes can be obtained by L<ERR_get_error(3)|ERR_get_error(3)>. + +=head1 BUGS + +B<callback(2, x, cb_arg)> is used with two different meanings. + +RSA_generate_key() goes into an infinite loop for illegal input values. + +=head1 SEE ALSO + +L<ERR_get_error(3)|ERR_get_error(3)>, L<rand(3)|rand(3)>, L<rsa(3)|rsa(3)>, +L<RSA_free(3)|RSA_free(3)> + +=head1 HISTORY + +The B<cb_arg> argument was added in SSLeay 0.9.0. + +=cut |