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1 | =pod |
2 | ||
3 | =head1 NAME | |
4 | ||
5 | RSA_sign, RSA_verify - RSA signatures | |
6 | ||
7 | =head1 SYNOPSIS | |
8 | ||
9 | #include <openssl/rsa.h> | |
10 | ||
00df8947 | 11 | int RSA_sign(int type, const unsigned char *m, unsigned int m_len, |
e9b77246 | 12 | unsigned char *sigret, unsigned int *siglen, RSA *rsa); |
2186cd8e | 13 | |
00df8947 | 14 | int RSA_verify(int type, const unsigned char *m, unsigned int m_len, |
e9b77246 | 15 | unsigned char *sigbuf, unsigned int siglen, RSA *rsa); |
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16 | |
17 | =head1 DESCRIPTION | |
18 | ||
19 | RSA_sign() signs the message digest B<m> of size B<m_len> using the | |
aa90ca11 DB |
20 | private key B<rsa> using RSASSA-PKCS1-v1_5 as specified in RFC 3447. It |
21 | stores the signature in B<sigret> and the signature size in B<siglen>. | |
22 | B<sigret> must point to RSA_size(B<rsa>) bytes of memory. | |
fc1d88f0 RS |
23 | Note that PKCS #1 adds meta-data, placing limits on the size of the |
24 | key that can be used. | |
9b86974e | 25 | See L<RSA_private_encrypt(3)> for lower-level |
fc1d88f0 | 26 | operations. |
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27 | |
28 | B<type> denotes the message digest algorithm that was used to generate | |
c03726ca RS |
29 | B<m>. |
30 | If B<type> is B<NID_md5_sha1>, | |
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31 | an SSL signature (MD5 and SHA1 message digests with PKCS #1 padding |
32 | and no algorithm identifier) is created. | |
33 | ||
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34 | RSA_verify() verifies that the signature B<sigbuf> of size B<siglen> |
35 | matches a given message digest B<m> of size B<m_len>. B<type> denotes | |
36 | the message digest algorithm that was used to generate the signature. | |
37 | B<rsa> is the signer's public key. | |
38 | ||
39 | =head1 RETURN VALUES | |
40 | ||
c03726ca RS |
41 | RSA_sign() returns 1 on success. |
42 | RSA_verify() returns 1 on successful verification. | |
2186cd8e | 43 | |
9b86974e | 44 | The error codes can be obtained by L<ERR_get_error(3)>. |
2186cd8e | 45 | |
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46 | =head1 CONFORMING TO |
47 | ||
48 | SSL, PKCS #1 v2.0 | |
49 | ||
50 | =head1 SEE ALSO | |
51 | ||
c03726ca | 52 | L<ERR_get_error(3)>, |
53934822 | 53 | L<RSA_private_encrypt(3)>, |
1bc74519 | 54 | L<RSA_public_decrypt(3)> |
2186cd8e | 55 | |
e2f92610 RS |
56 | =head1 COPYRIGHT |
57 | ||
58 | Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved. | |
59 | ||
60 | Licensed under the OpenSSL license (the "License"). You may not use | |
61 | this file except in compliance with the License. You can obtain a copy | |
62 | in the file LICENSE in the source distribution or at | |
63 | L<https://www.openssl.org/source/license.html>. | |
64 | ||
65 | =cut |