PHP_FUNCTION(openssl_pkey_get_details)
{
	zval *key;
	EVP_PKEY *pkey;
	BIO *out;
	unsigned int pbio_len;
	char *pbio;
	long ktype;

	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "r", &key) == FAILURE) {
		return;
	}
	ZEND_FETCH_RESOURCE(pkey, EVP_PKEY *, &key, -1, "OpenSSL key", le_key);
	if (!pkey) {
		RETURN_FALSE;
	}
	out = BIO_new(BIO_s_mem());
	PEM_write_bio_PUBKEY(out, pkey);
	pbio_len = BIO_get_mem_data(out, &pbio);

	array_init(return_value);
	add_assoc_long(return_value, "bits", EVP_PKEY_bits(pkey));
	add_assoc_stringl(return_value, "key", pbio, pbio_len, 1);
	/*TODO: Use the real values once the openssl constants are used
	 * See the enum at the top of this file
	 */
	switch (EVP_PKEY_type(pkey->type)) {
		case EVP_PKEY_RSA:
		case EVP_PKEY_RSA2:
			ktype = OPENSSL_KEYTYPE_RSA;

			if (pkey->pkey.rsa != NULL) {
				zval *rsa;

				ALLOC_INIT_ZVAL(rsa);
				array_init(rsa);
				OPENSSL_PKEY_GET_BN(rsa, n);
				OPENSSL_PKEY_GET_BN(rsa, e);
				OPENSSL_PKEY_GET_BN(rsa, d);
				OPENSSL_PKEY_GET_BN(rsa, p);
				OPENSSL_PKEY_GET_BN(rsa, q);
				OPENSSL_PKEY_GET_BN(rsa, dmp1);
				OPENSSL_PKEY_GET_BN(rsa, dmq1);
				OPENSSL_PKEY_GET_BN(rsa, iqmp);
				add_assoc_zval(return_value, "rsa", rsa);
			}

			break;
		case EVP_PKEY_DSA:
		case EVP_PKEY_DSA2:
		case EVP_PKEY_DSA3:
		case EVP_PKEY_DSA4:
			ktype = OPENSSL_KEYTYPE_DSA;

			if (pkey->pkey.dsa != NULL) {
				zval *dsa;

				ALLOC_INIT_ZVAL(dsa);
				array_init(dsa);
				OPENSSL_PKEY_GET_BN(dsa, p);
				OPENSSL_PKEY_GET_BN(dsa, q);
				OPENSSL_PKEY_GET_BN(dsa, g);
				OPENSSL_PKEY_GET_BN(dsa, priv_key);
				OPENSSL_PKEY_GET_BN(dsa, pub_key);
				add_assoc_zval(return_value, "dsa", dsa);
			}
			break;
		case EVP_PKEY_DH:

			ktype = OPENSSL_KEYTYPE_DH;

			if (pkey->pkey.dh != NULL) {
				zval *dh;

				ALLOC_INIT_ZVAL(dh);
				array_init(dh);
				OPENSSL_PKEY_GET_BN(dh, p);
				OPENSSL_PKEY_GET_BN(dh, g);
				OPENSSL_PKEY_GET_BN(dh, priv_key);
				OPENSSL_PKEY_GET_BN(dh, pub_key);
				add_assoc_zval(return_value, "dh", dh);
			}

			break;
#ifdef HAVE_EVP_PKEY_EC
		case EVP_PKEY_EC:
			ktype = OPENSSL_KEYTYPE_EC;
			break;
#endif
		default:
			ktype = -1;
			break;
	}
	add_assoc_long(return_value, "type", ktype);

	BIO_free(out);
}

This weakness pertains to the use of cryptographic functions that are weak, misconfigured, or outdated, which undermines the intended protection of encrypted data and communications.