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a528d4f0a9
If something was "present in all versions" of SSLeay, or if it was added to a version of SSLeay (and therefore predates OpenSSL), remove mention of it. Documentation history now starts with OpenSSL. Remove mention of all history before OpenSSL 0.9.8, inclusive. Remove all AUTHOR sections. Reviewed-by: Tim Hudson <tjh@openssl.org>
77 lines
2.0 KiB
Plaintext
77 lines
2.0 KiB
Plaintext
=pod
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=head1 NAME
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RSA_generate_key_ex, RSA_generate_key - generate RSA key pair
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=head1 SYNOPSIS
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#include <openssl/rsa.h>
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int RSA_generate_key_ex(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);
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Deprecated:
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RSA *RSA_generate_key(int num, unsigned long e,
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void (*callback)(int,int,void *), void *cb_arg);
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=head1 DESCRIPTION
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RSA_generate_key_ex() generates a key pair and stores it in the B<RSA>
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structure provided in B<rsa>. The pseudo-random number generator must
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be seeded prior to calling RSA_generate_key_ex().
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The modulus size will be of length B<bits>, and the public exponent will be
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B<e>. Key sizes with B<num> E<lt> 1024 should be considered insecure.
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The exponent is an odd number, typically 3, 17 or 65537.
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A callback function may be used to provide feedback about the
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progress of the key generation. If B<cb> is not B<NULL>, it
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will be called as follows using the BN_GENCB_call() function
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described on the L<BN_generate_prime(3)> page.
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=over 4
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=item *
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While a random prime number is generated, it is called as
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described in L<BN_generate_prime(3)>.
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=item *
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When the n-th randomly generated prime is rejected as not
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suitable for the key, B<BN_GENCB_call(cb, 2, n)> is called.
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=item *
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When a random p has been found with p-1 relatively prime to B<e>,
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it is called as B<BN_GENCB_call(cb, 3, 0)>.
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=back
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The process is then repeated for prime q with B<BN_GENCB_call(cb, 3, 1)>.
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RSA_generate_key is deprecated (new applications should use
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RSA_generate_key_ex instead). RSA_generate_key works in the same was as
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RSA_generate_key_ex except it uses "old style" call backs. See
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L<BN_generate_prime(3)> for further details.
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=head1 RETURN VALUE
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If key generation fails, RSA_generate_key() returns B<NULL>.
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The error codes can be obtained by L<ERR_get_error(3)>.
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=head1 BUGS
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B<BN_GENCB_call(cb, 2, x)> is used with two different meanings.
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RSA_generate_key() goes into an infinite loop for illegal input values.
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=head1 SEE ALSO
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L<ERR_get_error(3)>, L<rand(3)>, L<rsa(3)>,
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L<RSA_free(3)>, L<BN_generate_prime(3)>
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=cut
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