int tls1_process_sigalgs(SSL *s, const unsigned char *data, int dsize)
	{
	int i, idx;
	const EVP_MD *md;
	CERT *c = s->cert;
	/* Extension ignored for TLS versions below 1.2 */
	if (TLS1_get_version(s) < TLS1_2_VERSION)
		return 1;
	/* Should never happen */
	if (!c)
		return 0;

	c->pkeys[SSL_PKEY_DSA_SIGN].digest = NULL;
	c->pkeys[SSL_PKEY_RSA_SIGN].digest = NULL;
	c->pkeys[SSL_PKEY_RSA_ENC].digest = NULL;
	c->pkeys[SSL_PKEY_ECC].digest = NULL;

	for (i = 0; i < dsize; i += 2)
		{
		unsigned char hash_alg = data[i], sig_alg = data[i+1];

		switch(sig_alg)
			{
#ifndef OPENSSL_NO_RSA
			case TLSEXT_signature_rsa:
			idx = SSL_PKEY_RSA_SIGN;
			break;
#endif
#ifndef OPENSSL_NO_DSA
			case TLSEXT_signature_dsa:
			idx = SSL_PKEY_DSA_SIGN;
			break;
#endif
#ifndef OPENSSL_NO_ECDSA
			case TLSEXT_signature_ecdsa:
			idx = SSL_PKEY_ECC;
			break;
#endif
			default:
			continue;
			}

		if (c->pkeys[idx].digest == NULL)
			{
			md = tls12_get_hash(hash_alg);
			if (md)
				{
				c->pkeys[idx].digest = md;
				if (idx == SSL_PKEY_RSA_SIGN)
					c->pkeys[SSL_PKEY_RSA_ENC].digest = md;
				}
			}

		}


	/* Set any remaining keys to default values. NOTE: if alg is not
	 * supported it stays as NULL.
	 */
#ifndef OPENSSL_NO_DSA
	if (!c->pkeys[SSL_PKEY_DSA_SIGN].digest)
		c->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1();
#endif
#ifndef OPENSSL_NO_RSA
	if (!c->pkeys[SSL_PKEY_RSA_SIGN].digest)
		{
		c->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
		c->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
		}
#endif
#ifndef OPENSSL_NO_ECDSA
	if (!c->pkeys[SSL_PKEY_ECC].digest)
		c->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
#endif
	return 1;
	}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.