tls_signer_sign
int tls_signer_sign(struct tls_signer *_signer, const char *_pubkey_hash,
if (tls_signer_sign(signer, server_rsa_pubkey_hash, test_digest,
if (tls_signer_sign(signer, server_ecdsa_pubkey_hash, test_digest,
if (tls_signer_sign(signer, server_unknown_pubkey_hash, test_digest,
return tls_signer_sign(signer, pubkey_hash, input, input_len,