#include <openssl/rsa.h>
- int RSA_sign(int type, unsigned char *m, unsigned int m_len,
+ 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, unsigned char *m, unsigned int m_len,
+ int RSA_verify(int type, const unsigned char *m, unsigned int m_len,
unsigned char *sigbuf, unsigned int siglen, RSA *rsa);
=head1 DESCRIPTION
private key B<rsa> as specified in PKCS #1 v2.0. It stores the
signature in B<sigret> and the signature size in B<siglen>. B<sigret>
must point to RSA_size(B<rsa>) bytes of memory.
+Note that PKCS #1 adds meta-data, placing limits on the size of the
+key that can be used.
+See L<RSA_private_encrypt(3)|RSA_private_encrypt(3)> for lower-level
+operations.
B<type> denotes the message digest algorithm that was used to generate
B<m>. It usually is one of B<NID_sha1>, B<NID_ripemd160> and B<NID_md5>;