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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
#include <string.h>
#include "error/s2n_errno.h"
#include "stuffer/s2n_stuffer.h"
#include "testlib/s2n_testlib.h"
#include "utils/s2n_safety.h"
S2N_RESULT s2n_stuffer_alloc_from_hex(struct s2n_stuffer *bytes_out, const char *hex_cstr)
{
RESULT_ENSURE_REF(bytes_out);
RESULT_ENSURE_REF(hex_cstr);
DEFER_CLEANUP(struct s2n_stuffer hex = { 0 }, s2n_stuffer_free);
/* Copying the hex into heap memory to handle the 'const' isn't exactly efficient,
* but for a testlib method it is sufficient.
*/
RESULT_GUARD_POSIX(s2n_stuffer_alloc(&hex, strlen(hex_cstr)));
RESULT_GUARD_POSIX(s2n_stuffer_write_str(&hex, hex_cstr));
uint32_t bytes_size = strlen(hex_cstr) / 2;
RESULT_GUARD_POSIX(s2n_stuffer_alloc(bytes_out, bytes_size));
RESULT_GUARD(s2n_stuffer_read_hex(&hex, &bytes_out->blob));
RESULT_ENSURE(s2n_stuffer_data_available(&hex) == 0, S2N_ERR_BAD_HEX);
RESULT_GUARD_POSIX(s2n_stuffer_skip_write(bytes_out, bytes_size));
return S2N_RESULT_OK;
}
S2N_RESULT s2n_blob_alloc_from_hex_with_whitespace(struct s2n_blob *bytes_out, const char *hex_cstr)
{
RESULT_ENSURE_REF(bytes_out);
RESULT_ENSURE_REF(hex_cstr);
DEFER_CLEANUP(struct s2n_stuffer hex_in = { 0 }, s2n_stuffer_free);
RESULT_GUARD_POSIX(s2n_stuffer_alloc(&hex_in, strlen(hex_cstr)));
for (size_t i = 0; i < strlen(hex_cstr); i++) {
if (hex_cstr[i] == ' ') {
continue;
}
RESULT_GUARD_POSIX(s2n_stuffer_write_uint8(&hex_in, hex_cstr[i]));
}
uint32_t hex_in_size = s2n_stuffer_data_available(&hex_in);
RESULT_GUARD_POSIX(s2n_alloc(bytes_out, hex_in_size / 2));
RESULT_GUARD(s2n_stuffer_read_hex(&hex_in, bytes_out));
RESULT_ENSURE(s2n_stuffer_data_available(&hex_in) == 0, S2N_ERR_BAD_HEX);
return S2N_RESULT_OK;
}
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