1f13ad3113
All missing sections are added. Reviewed-by: Andy Polyakov <appro@openssl.org> Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/4976)
107 lines
3.2 KiB
Text
107 lines
3.2 KiB
Text
=pod
|
|
|
|
=head1 NAME
|
|
|
|
RSA_generate_key_ex, RSA_generate_key,
|
|
RSA_generate_multi_prime_key - generate RSA key pair
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/rsa.h>
|
|
|
|
int RSA_generate_key_ex(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);
|
|
int RSA_generate_multi_prime_key(RSA *rsa, int bits, int primes, BIGNUM *e, BN_GENCB *cb);
|
|
|
|
Deprecated:
|
|
|
|
#if OPENSSL_API_COMPAT < 0x00908000L
|
|
RSA *RSA_generate_key(int num, unsigned long e,
|
|
void (*callback)(int, int, void *), void *cb_arg);
|
|
#endif
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
RSA_generate_key_ex() generates a 2-prime RSA key pair and stores it in the
|
|
B<RSA> structure provided in B<rsa>. The pseudo-random number generator must
|
|
be seeded prior to calling RSA_generate_key_ex().
|
|
|
|
RSA_generate_multi_prime_key() generates a multi-prime RSA key pair and stores
|
|
it in the B<RSA> structure provided in B<rsa>. The number of primes is given by
|
|
the B<primes> parameter. The pseudo-random number generator must be seeded prior
|
|
to calling RSA_generate_multi_prime_key().
|
|
|
|
The modulus size will be of length B<bits>, the number of primes to form the
|
|
modulus will be B<primes>, 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.
|
|
|
|
In order to maintain adequate security level, the maximum number of permitted
|
|
B<primes> depends on modulus bit length:
|
|
|
|
<1024 | >=1024 | >=4096 | >=8192
|
|
------+--------+--------+-------
|
|
2 | 3 | 4 | 5
|
|
|
|
A callback function may be used to provide feedback about the
|
|
progress of the key generation. If B<cb> is not B<NULL>, it
|
|
will be called as follows using the BN_GENCB_call() function
|
|
described on the L<BN_generate_prime(3)> page.
|
|
|
|
RSA_generate_prime() is similar to RSA_generate_prime_ex() but
|
|
expects an old-style callback function; see
|
|
L<BN_generate_prime(3)> for information on the old-style callback.
|
|
|
|
=over 2
|
|
|
|
=item *
|
|
|
|
While a random prime number is generated, it is called as
|
|
described in L<BN_generate_prime(3)>.
|
|
|
|
=item *
|
|
|
|
When the n-th randomly generated prime is rejected as not
|
|
suitable for the key, B<BN_GENCB_call(cb, 2, n)> is called.
|
|
|
|
=item *
|
|
|
|
When a random p has been found with p-1 relatively prime to B<e>,
|
|
it is called as B<BN_GENCB_call(cb, 3, 0)>.
|
|
|
|
=back
|
|
|
|
The process is then repeated for prime q and other primes (if any)
|
|
with B<BN_GENCB_call(cb, 3, i)> where B<i> indicates the i-th prime.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
RSA_generate_multi_prime_key() returns 1 on success or 0 on error.
|
|
RSA_generate_key_ex() returns 1 on success or 0 on error.
|
|
The error codes can be obtained by L<ERR_get_error(3)>.
|
|
|
|
RSA_generate_key() returns a pointer to the RSA structure or
|
|
B<NULL> if the key generation fails.
|
|
|
|
=head1 BUGS
|
|
|
|
B<BN_GENCB_call(cb, 2, x)> is used with two different meanings.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<ERR_get_error(3)>, L<RAND_bytes(3)>, L<BN_generate_prime(3)>
|
|
|
|
=head1 HISTORY
|
|
|
|
RSA_generate_key() was deprecated in OpenSSL 0.9.8; use
|
|
RSA_generate_key_ex() intsead.
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
|
|
|
|
Licensed under the OpenSSL license (the "License"). You may not use
|
|
this file except in compliance with the License. You can obtain a copy
|
|
in the file LICENSE in the source distribution or at
|
|
L<https://www.openssl.org/source/license.html>.
|
|
|
|
=cut
|