Finish hashing and output the HMAC digest. @param ctx The HMAC context @param out The output buffer to write the digest into @param outlen The length of the out buffer, in bytes @return The number of bytes written to out, or a negative error code.
See Implementation
Finish hashing and output the HMAC digest. @param ctx The HMAC context @param out The output buffer to write the digest into @param outlen The length of the out buffer, in bytes @return The number of bytes written to out, or a negative error code.