tests-base64.c
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/*
* Copyright (C) 2015 Martin Landsmann
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
#define TEST_BASE64_SHOW_OUTPUT (0) /**< set if encoded/decoded string is displayed */
#if (TEST_BASE64_SHOW_OUTPUT == 1)
#include <stdio.h>
#endif
#include <string.h>
#include "embUnit.h"
#include "tests-base64.h"
#include "base64.h"
static void test_base64_01_encode_string(void)
{
unsigned char data_in[] = "Hello RIOT this is a base64 test!\n"
"This should work as intended.";
unsigned char expected_encoding[] = "SGVsbG8gUklPVCB0aGlzIGlzIGEgYmFzZTY0IHR"
"lc3QhClRoaXMgc2hvdWxkIHdvcmsgYXMgaW50ZW5kZWQu";
size_t data_in_size = strlen((char *)data_in);
size_t base64_out_size = 0;
unsigned char base64_out[ strlen((char *)expected_encoding) ];
/*
* @Note:
* The first encoding attempt fails, but reveals the required out size.
*
* This size is a lower bound estimation,
* thus it can require few more bytes then the actual used size for the output.
*/
int ret = base64_encode(data_in, data_in_size, NULL, &base64_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_ERROR_BUFFER_OUT_SIZE, ret);
ret = base64_encode(data_in, data_in_size, base64_out, &base64_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_SUCCESS, ret);
for (int i = 0; i < (int)base64_out_size; ++i) {
TEST_ASSERT_MESSAGE(base64_out[i] == expected_encoding[i], \
"encoding failed!(produced unexpected output)");
}
#if (TEST_BASE64_SHOW_OUTPUT == 1)
puts("Test 01 Encoded:");
for (int i = 0; i < (int)base64_out_size; ++i) {
printf("%c", base64_out[i]);
}
printf("\nFrom:\n%s\n", (char *)data_in);
#endif
}
static void test_base64_02_decode_base64(void)
{
unsigned char encoded_base64[] = "SGVsbG8gUklPVCB0aGlzIGlzIGEgYmFzZTY0IHRlc3Q"
"hClRoaXMgc2hvdWxkIHdvcmsgYXMgaW50ZW5kZWQu";
unsigned char expected_string[] = "Hello RIOT this is a base64 test!\n"
"This should work as intended.";
size_t base64_size = strlen((char *)encoded_base64);
size_t data_out_size = 0;
unsigned char data_out[ strlen((char *)expected_string) ];
int ret = base64_decode(encoded_base64, base64_size, NULL, &data_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_ERROR_BUFFER_OUT_SIZE, ret);
ret = base64_decode(encoded_base64, base64_size, NULL, &data_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_ERROR_BUFFER_OUT, ret);
ret = base64_decode(encoded_base64, base64_size, data_out, &data_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_SUCCESS, ret);
for (int i = 0; i < (int)data_out_size; ++i) {
TEST_ASSERT_MESSAGE(data_out[i] == expected_string[i], \
"decoding failed!(produced unexpected output)");
}
#if (TEST_BASE64_SHOW_OUTPUT == 1)
puts("Test 02 Decoded:");
for (int i = 0; i < (int)data_out_size; ++i) {
printf("%c", data_out[i]);
}
printf("\nFrom:\n%s\n", (char *)encoded_base64);
#endif
}
static void test_base64_03_single_character(void)
{
size_t element_size = 1;
unsigned char element[] = "1";
size_t elementDecodeSize = 3;
unsigned char elementDecode[3];
size_t element_base64_out_size = 10;
unsigned char element_base64_out[10];
int ret = base64_encode(element, element_size, \
element_base64_out, &element_base64_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_SUCCESS, ret);
ret = base64_decode(element_base64_out, element_base64_out_size, \
elementDecode, &elementDecodeSize);
TEST_ASSERT_EQUAL_INT(BASE64_SUCCESS, ret);
for (int i = 0; i < (int)elementDecodeSize; ++i) {
TEST_ASSERT_MESSAGE(element[i] == elementDecode[i], \
"decoding failed!(produced unexpected output)");
}
}
static void test_base64_04_free_conversion(void)
{
size_t elements = 255;
unsigned char elm[elements];
size_t elem_base64_out_size = 0;
unsigned char elm_base64_out[((elements / 3) * 4) + (elements / 10)];
size_t elem_base64_out_decoded_size = 0;
unsigned char elem_base64_out_decoded[ elements + 10 ];
/* fill some values */
for (int i = 0; i < (int)elements; ++i) {
elm[i] = i;
}
int ret = base64_encode(elm, elements, NULL, &elem_base64_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_ERROR_BUFFER_OUT_SIZE, ret);
ret = base64_encode(elm, elements, elm_base64_out, &elem_base64_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_SUCCESS, ret);
ret = base64_decode(elm_base64_out, elem_base64_out_size, \
NULL, &elem_base64_out_decoded_size);
TEST_ASSERT_EQUAL_INT(BASE64_ERROR_BUFFER_OUT_SIZE, ret);
ret = base64_decode(elm_base64_out, elem_base64_out_size, \
elem_base64_out_decoded, &elem_base64_out_decoded_size);
TEST_ASSERT_EQUAL_INT(BASE64_SUCCESS, ret);
for (int i = 0; i < (int)elements; ++i) {
TEST_ASSERT_MESSAGE(elem_base64_out_decoded[i] == elm[i], \
"decoding failed!(produced unexpected output)");
}
}
static void test_base64_05_decode_larger(void)
{
unsigned char decodeit[] = "SG93IG11Y2ggd29vZCB3b3VsZCBhIHdvb2RjaHVjayBjaHVj"
"awppZiBhIHdvb2RjaHVjayBjb3VsZCBjaHVjayB3b29kPwpI"
"ZSB3b3VsZCBjaHVjaywgaGUgd291bGQsIGFzIG11Y2ggYXMg"
"aGUgY291bGQsCmFuZCBjaHVjayBhcyBtdWNoIHdvb2QgYXMg"
"YSB3b29kY2h1Y2sgd291bGQKaWYgYSB3b29kY2h1Y2sgY291"
"bGQgY2h1Y2sgd29vZC4==";
size_t data_size = 199;
unsigned char data[data_size];
size_t decodeit_size = strlen((char *)decodeit);
int ret = base64_decode(decodeit, decodeit_size, data, &data_size);
TEST_ASSERT_EQUAL_INT(BASE64_SUCCESS, ret);
#if (TEST_BASE64_SHOW_OUTPUT == 1)
puts("Test 05 Decoded:");
for (int i = 0; i < (int)data_size; ++i) {
printf("%c", data[i]);
}
printf("\nFrom:\n%s\n", (char *)decodeit);
#endif
}
static void test_base64_06_stream_encode(void)
{
/*
* @Note:
* In this test we divide the `stream_encode[]` input for the encoding
* into several portions (chunks).
*
* Every chunk is encoded and appended to the base64 `encode_result[]`.
* To enable appending further, the chunks MUST be dividable by 3.
* Only the final chunk MAY be prime to 3. (it is in this test)
*
*/
unsigned char stream_encode[] = "Peter Piper picked a peck of pickled peppers."
"\nA peck of pickled peppers Peter Piper picked."
"\nIf Peter Piper picked a peck of pickled peppers,"
"\nWhere's the peck of pickled peppers Peter Piper picked?";
/* required output size +2 extra bytes */
size_t encoded_size = 264 + 2;
/* cppcheck-suppress unassignedVariable */
unsigned char encode_result[encoded_size];
/* the above array is used/assigned in base64_encode() using its pointer. */
int remain = strlen((char *)stream_encode);
int out_iter = 0;
int ret = BASE64_SUCCESS;
for (int i = 3; i < remain; (i += 3)) {
size_t size_used = encoded_size - out_iter;
ret = base64_encode(stream_encode + (strlen((char *)stream_encode) - remain), \
i, encode_result + out_iter, &size_used);
TEST_ASSERT_EQUAL_INT(BASE64_SUCCESS, ret);
out_iter += size_used;
remain -= i;
}
/* this final chunk we want to encode and append is prime to 3 */
size_t finish = encoded_size - out_iter;
ret = base64_encode(stream_encode + (strlen((char *)stream_encode) - remain), \
remain, encode_result + out_iter, &finish);
TEST_ASSERT_EQUAL_INT(BASE64_SUCCESS, ret);
#if (TEST_BASE64_SHOW_OUTPUT == 1)
out_iter += finish;
puts("Test 06 Encoded:");
for (int i = 0; i < (int)out_iter; ++i) {
printf("%c", encode_result[i]);
}
printf("\nFrom:\n%s\n", (char *)stream_encode);
#endif
}
static void test_base64_07_stream_decode(void)
{
/* @Note:
* Here we decode the base64 string `encoded[]`
*
* Every base64 chunk is decoded and appended to `stream_decoded[]`.
* The chunks passed to decode MUST be dividable by 4.
*/
unsigned char encoded[] = "UGV0ZXIgUGlwZXIgcGlja2VkIGEgcGVjayBvZiBwaWNrbGVkIH"
"BlcHBlcnMuCkEgcGVjayBvZiBwaWNrbGVkIHBlcHBlcnMgUGV0"
"ZXIgUGlwZXIgcGlja2VkLgpJZiBQZXRlciBQaXBlciBwaWNrZW"
"QgYSBwZWNrIG9mIHBpY2tsZWQgcGVwcGVycywKV2hlcmUncyB0"
"aGUgcGVjayBvZiBwaWNrbGVkIHBlcHBlcnMgUGV0ZXIgUGlwZX"
"IgcGlja2VkPw==";
/* required output size +2 extra bytes */
size_t decoded_size = 196 + 2;
/* cppcheck-suppress unassignedVariable */
unsigned char stream_decoded[decoded_size];
/* the above array is used/assigned in base64_decode() using its pointer. */
size_t encoded_size = strlen((char *)encoded);
int remain = encoded_size;
int out_iter = 0;
int ret = BASE64_SUCCESS;
for (int i = 4; i < remain; (i += 4)) {
size_t size_used = decoded_size - out_iter;
ret = base64_decode(encoded + (encoded_size - remain), \
i, stream_decoded + out_iter, &size_used);
TEST_ASSERT_EQUAL_INT(BASE64_SUCCESS, ret);
out_iter += size_used;
remain -= i;
}
size_t finish = decoded_size - out_iter;
ret = base64_decode(encoded + (encoded_size - remain), \
remain, stream_decoded + out_iter, &finish);
TEST_ASSERT_EQUAL_INT(BASE64_SUCCESS, ret);
#if (TEST_BASE64_SHOW_OUTPUT == 1)
out_iter += finish;
puts("Test 07 Decoded:");
for (int i = 0; i < (int)out_iter; ++i) {
printf("%c", stream_decoded[i]);
}
printf("\nFrom:\n%s\n", (char *)encoded);
#endif
}
Test *tests_base64_tests(void)
{
EMB_UNIT_TESTFIXTURES(fixtures) {
new_TestFixture(test_base64_01_encode_string),
new_TestFixture(test_base64_02_decode_base64),
new_TestFixture(test_base64_03_single_character),
new_TestFixture(test_base64_04_free_conversion),
new_TestFixture(test_base64_05_decode_larger),
new_TestFixture(test_base64_06_stream_encode),
new_TestFixture(test_base64_07_stream_decode),
};
EMB_UNIT_TESTCALLER(base64_tests, NULL, NULL, fixtures);
return (Test *)&base64_tests;
}
void tests_base64(void)
{
TESTS_RUN(tests_base64_tests());
}