f4401cd869
alter des.h to be friendly with openssl/des.h (you can include both in the same file) make libkrb to depend on libdes. bump major. massage various portioin of heimdal to be friendly with openssl 0.9.7b.
198 lines
5.7 KiB
Groff
198 lines
5.7 KiB
Groff
.\" $NetBSD: RSA_generate_key.3,v 1.12 2003/07/24 14:16:42 itojun Exp $
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.\" ======================================================================
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.\"
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.IX Title "RSA_generate_key 3"
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.TH RSA_generate_key 3 "0.9.7b" "2002-09-25" "OpenSSL"
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.UC
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.SH "NAME"
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RSA_generate_key \- generate \s-1RSA\s0 key pair
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.SH "LIBRARY"
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libcrypto, -lcrypto
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/rsa.h>
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.Ve
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.Vb 2
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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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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\fIRSA_generate_key()\fR generates a key pair and returns it in a newly
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allocated \fB\s-1RSA\s0\fR structure. The pseudo-random number generator must
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be seeded prior to calling \fIRSA_generate_key()\fR.
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.PP
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The modulus size will be \fBnum\fR bits, and the public exponent will be
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\&\fBe\fR. Key sizes with \fBnum\fR < 1024 should be considered insecure.
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The exponent is an odd number, typically 3, 17 or 65537.
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.PP
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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 \fBcallback\fR is not \fB\s-1NULL\s0\fR, it
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will be called as follows:
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.Ip "\(bu" 4
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While a random prime number is generated, it is called as
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described in BN_generate_prime(3).
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.Ip "\(bu" 4
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When the n-th randomly generated prime is rejected as not
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suitable for the key, \fBcallback(2, n, cb_arg)\fR is called.
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.Ip "\(bu" 4
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When a random p has been found with p-1 relatively prime to \fBe\fR,
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it is called as \fBcallback(3, 0, cb_arg)\fR.
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.PP
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The process is then repeated for prime q with \fBcallback(3, 1, cb_arg)\fR.
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.SH "RETURN VALUE"
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.IX Header "RETURN VALUE"
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If key generation fails, \fIRSA_generate_key()\fR returns \fB\s-1NULL\s0\fR; the
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error codes can be obtained by ERR_get_error(3).
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.SH "BUGS"
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.IX Header "BUGS"
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\&\fBcallback(2, x, cb_arg)\fR is used with two different meanings.
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.PP
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\&\fIRSA_generate_key()\fR goes into an infinite loop for illegal input values.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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ERR_get_error(3), openssl_rand(3), openssl_rsa(3),
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RSA_free(3)
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.SH "HISTORY"
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.IX Header "HISTORY"
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The \fBcb_arg\fR argument was added in SSLeay 0.9.0.
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