DSA_do_sign3ssl
Raw dsa signature operations
Usage
#include <openssl/dsa.h>The following functions have been deprecated since OpenSSL 3.0, and can be hidden entirely by defining OPENSSL_API_COMPAT with a suitable version value, see openssl_user_macros(7):
DSA_SIG *DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa);int DSA_do_verify(const unsigned char *dgst, int dgst_len,DSA_SIG *sig, DSA *dsa);
Overview
All of the functions described on this page are deprecated. Applications should instead use EVP_PKEY_sign_init(3), EVP_PKEY_sign(3), EVP_PKEY_verify_init(3) and EVP_PKEY_verify(3).
DSA_do_sign() computes a digital signature on the len byte message digest dgst using the private key dsa and returns it in a newly allocated DSA_SIG structure.
DSA_sign_setup(3) may be used to precompute part of the signing operation in case signature generation is time-critical.
DSA_do_verify() verifies that the signature sig matches a given message digest dgst of size len. dsa is the signer's public key.
Return values
DSA_do_sign() returns the signature, NULL on error. DSA_do_verify() returns 1 for a valid signature, 0 for an incorrect signature and -1 on error. The error codes can be obtained by ERR_get_error(3).
Releases
13 releases since Debian 3.0 (Woody); the text changed 12 times.