presto-main/src/main/java/io/prestosql/operator/scalar/HmacFunctions.java/HmacFunctions/hmacSha256
class HmacFunctions:    @Description("Compute HMAC with SHA256")
    @ScalarFunction
    @SqlType(StandardTypes.VARBINARY)
    public static Slice hmacSha256(@SqlType(StandardTypes.VARBINARY) Slice slice, @SqlType(StandardTypes.VARBINARY) Slice key)
    {
        return wrappedBuffer(Hashing.hmacSha256(key.getBytes()).hashBytes(slice.getBytes()).asBytes());
    }