=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 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. =cut