Function scram_ClientKey

src/common/scram-common.c:116–134

* Calculate ClientKey. Returns 0 on success, -1 on failure. */

 * Calculate ClientKey.  Returns 0 on success, -1 on failure.
 */
int
scram_ClientKey(const uint8 *salted_password, uint8 *result)
{
	pg_hmac_ctx *ctx = pg_hmac_create(PG_SHA256);

	if (ctx == NULL)
		return -1;

	if (pg_hmac_init(ctx, salted_password, SCRAM_KEY_LEN) < 0 ||
		pg_hmac_update(ctx, (uint8 *) "Client Key", strlen("Client Key")) < 0 ||
		pg_hmac_final(ctx, result, SCRAM_KEY_LEN) < 0)
	{
		pg_hmac_free(ctx);
		return -1;
	}

	pg_hmac_free(ctx);
	return 0;
}

/*
 * Calculate ServerKey.  Returns 0 on success, -1 on failure.