5 RSA_sign, RSA_verify - RSA signatures
9 #include <openssl/rsa.h>
11 int RSA_sign(int type, const unsigned char *m, unsigned int m_len,
12 unsigned char *sigret, unsigned int *siglen, RSA *rsa);
14 int RSA_verify(int type, const unsigned char *m, unsigned int m_len,
15 unsigned char *sigbuf, unsigned int siglen, RSA *rsa);
19 RSA_sign() signs the message digest B<m> of size B<m_len> using the
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.
23 Note that PKCS #1 adds meta-data, placing limits on the size of the
25 See L<RSA_private_encrypt(3)> for lower-level
28 B<type> denotes the message digest algorithm that was used to generate
30 If B<type> is B<NID_md5_sha1>,
31 an SSL signature (MD5 and SHA1 message digests with PKCS #1 padding
32 and no algorithm identifier) is created.
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.
41 RSA_sign() returns 1 on success.
42 RSA_verify() returns 1 on successful verification.
44 The error codes can be obtained by L<ERR_get_error(3)>.
53 L<RSA_private_encrypt(3)>,
54 L<RSA_public_decrypt(3)>
58 Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
60 Licensed under the Apache License 2.0 (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>.