static int s_aws_byte_buf_from_base64_json()

in source/kms.c [361:391]

• 25 lines of code
• 5 McCabe index (conditional complexity)

static int s_aws_byte_buf_from_base64_json(
    struct aws_allocator *allocator,
    struct json_object *obj,
    struct aws_byte_buf *byte_buf) {

    AWS_PRECONDITION(aws_allocator_is_valid(allocator));
    AWS_PRECONDITION(obj);
    AWS_PRECONDITION(byte_buf);

    const char *str = json_object_get_string(obj);
    if (str == NULL) {
        return AWS_OP_ERR;
    }

    size_t needed_capacity = 0;
    struct aws_byte_cursor cursor = aws_byte_cursor_from_c_str(str);
    if (aws_base64_compute_decoded_len(&cursor, &needed_capacity) != AWS_OP_SUCCESS) {
        return AWS_OP_ERR;
    }

    if (aws_byte_buf_init(byte_buf, allocator, needed_capacity) != AWS_OP_SUCCESS) {
        return AWS_OP_ERR;
    }

    if (aws_base64_decode(&cursor, byte_buf) != AWS_OP_SUCCESS) {
        aws_byte_buf_clean_up_secure(byte_buf);
        return AWS_OP_ERR;
    }

    return AWS_OP_SUCCESS;
}