=pod =head1 NAME RSA_sign, RSA_verify - RSA signatures =head1 SYNOPSIS #include int RSA_sign(int type, const unsigned char *m, unsigned int m_len, unsigned char *sigret, unsigned int *siglen, RSA *rsa); int RSA_verify(int type, const unsigned char *m, unsigned int m_len, unsigned char *sigbuf, unsigned int siglen, RSA *rsa); =head1 DESCRIPTION RSA_sign() signs the message digest B of size B using the private key B using RSASSA-PKCS1-v1_5 as specified in RFC 3447. It stores the signature in B and the signature size in B. B must point to RSA_size(B) bytes of memory. Note that PKCS #1 adds meta-data, placing limits on the size of the key that can be used. See L for lower-level operations. B denotes the message digest algorithm that was used to generate B. If B is B, an SSL signature (MD5 and SHA1 message digests with PKCS #1 padding and no algorithm identifier) is created. RSA_verify() verifies that the signature B of size B matches a given message digest B of size B. B denotes the message digest algorithm that was used to generate the signature. B is the signer's public key. =head1 RETURN VALUES RSA_sign() returns 1 on success. RSA_verify() returns 1 on successful verification. The error codes can be obtained by L. =head1 CONFORMING TO SSL, PKCS #1 v2.0 =head1 SEE ALSO L, L, L =head1 COPYRIGHT Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved. Licensed under the Apache License 2.0 (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. =cut