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/**
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0.
*/
#include <aws/auth/signable.h>
#include <aws/common/string.h>
#include <aws/http/request_response.h>
struct aws_signable_trailing_headers_impl {
struct aws_http_headers *trailing_headers;
struct aws_array_list headers;
struct aws_string *previous_signature;
};
static int s_aws_signable_trailing_headers_get_property(
const struct aws_signable *signable,
const struct aws_string *name,
struct aws_byte_cursor *out_value) {
struct aws_signable_trailing_headers_impl *impl = signable->impl;
AWS_ZERO_STRUCT(*out_value);
/*
* uri and method can be queried directly from the wrapper request
*/
if (aws_string_eq(name, g_aws_previous_signature_property_name)) {
*out_value = aws_byte_cursor_from_string(impl->previous_signature);
} else {
return aws_raise_error(AWS_ERROR_INVALID_ARGUMENT);
}
return AWS_OP_SUCCESS;
}
static int s_aws_signable_trailing_headers_get_property_list(
const struct aws_signable *signable,
const struct aws_string *name,
struct aws_array_list **out_list) {
(void)signable;
(void)name;
(void)out_list;
struct aws_signable_trailing_headers_impl *impl = signable->impl;
*out_list = NULL;
if (aws_string_eq(name, g_aws_http_headers_property_list_name)) {
*out_list = &impl->headers;
} else {
return aws_raise_error(AWS_ERROR_UNSUPPORTED_OPERATION);
}
return AWS_OP_SUCCESS;
}
static int s_aws_signable_trailing_headers_get_payload_stream(
const struct aws_signable *signable,
struct aws_input_stream **out_input_stream) {
(void)signable;
*out_input_stream = NULL;
return AWS_OP_SUCCESS;
}
static void s_aws_signable_trailing_headers_destroy(struct aws_signable *signable) {
if (signable == NULL) {
return;
}
struct aws_signable_trailing_headers_impl *impl = signable->impl;
if (impl == NULL) {
return;
}
aws_http_headers_release(impl->trailing_headers);
aws_string_destroy(impl->previous_signature);
aws_array_list_clean_up(&impl->headers);
aws_mem_release(signable->allocator, signable);
}
static struct aws_signable_vtable s_signable_trailing_headers_vtable = {
.get_property = s_aws_signable_trailing_headers_get_property,
.get_property_list = s_aws_signable_trailing_headers_get_property_list,
.get_payload_stream = s_aws_signable_trailing_headers_get_payload_stream,
.destroy = s_aws_signable_trailing_headers_destroy,
};
struct aws_signable *aws_signable_new_trailing_headers(
struct aws_allocator *allocator,
struct aws_http_headers *trailing_headers,
struct aws_byte_cursor previous_signature) {
struct aws_signable *signable = NULL;
struct aws_signable_trailing_headers_impl *impl = NULL;
aws_mem_acquire_many(
allocator, 2, &signable, sizeof(struct aws_signable), &impl, sizeof(struct aws_signable_trailing_headers_impl));
AWS_ZERO_STRUCT(*signable);
AWS_ZERO_STRUCT(*impl);
/* Keep the headers alive. We're referencing the underlying strings. */
aws_http_headers_acquire(trailing_headers);
impl->trailing_headers = trailing_headers;
signable->allocator = allocator;
signable->vtable = &s_signable_trailing_headers_vtable;
signable->impl = impl;
/*
* Convert headers list to aws_signable_property_list_pair arraylist since they're not different types.
*/
size_t header_count = aws_http_headers_count(trailing_headers);
if (aws_array_list_init_dynamic(
&impl->headers, allocator, header_count, sizeof(struct aws_signable_property_list_pair))) {
goto on_error;
}
for (size_t i = 0; i < header_count; ++i) {
struct aws_http_header header;
aws_http_headers_get_index(trailing_headers, i, &header);
struct aws_signable_property_list_pair property = {.name = header.name, .value = header.value};
aws_array_list_push_back(&impl->headers, &property);
}
impl->previous_signature = aws_string_new_from_array(allocator, previous_signature.ptr, previous_signature.len);
if (impl->previous_signature == NULL) {
goto on_error;
}
return signable;
on_error:
aws_signable_destroy(signable);
return NULL;
}
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