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/* BEGIN_HEADER */
#include "mbedtls/base64.h"
#include "base64_internal.h"
#include "constant_time_internal.h"
#include <test/constant_flow.h>
#if defined(MBEDTLS_TEST_HOOKS)
static const char base64_digits[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
#endif /* MBEDTLS_TEST_HOOKS */
/* END_HEADER */
/* BEGIN_DEPENDENCIES
* depends_on:MBEDTLS_BASE64_C
* END_DEPENDENCIES
*/
/* BEGIN_CASE depends_on:MBEDTLS_TEST_HOOKS */
void enc_chars()
{
for (unsigned value = 0; value < 64; value++) {
mbedtls_test_set_step(value);
TEST_CF_SECRET(&value, sizeof(value));
unsigned char digit = mbedtls_ct_base64_enc_char(value);
TEST_CF_PUBLIC(&value, sizeof(value));
TEST_CF_PUBLIC(&digit, sizeof(digit));
TEST_EQUAL(digit, base64_digits[value]);
}
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_TEST_HOOKS */
void dec_chars()
{
char *p;
signed char expected;
for (unsigned c = 0; c <= 0xff; c++) {
mbedtls_test_set_step(c);
/* base64_digits is 0-terminated. sizeof()-1 excludes the trailing 0. */
p = memchr(base64_digits, c, sizeof(base64_digits) - 1);
if (p == NULL) {
expected = -1;
} else {
expected = p - base64_digits;
}
TEST_CF_SECRET(&c, sizeof(c));
signed char actual = mbedtls_ct_base64_dec_value(c);
TEST_CF_PUBLIC(&c, sizeof(c));
TEST_CF_PUBLIC(&actual, sizeof(actual));
TEST_EQUAL(actual, expected);
}
}
/* END_CASE */
/* BEGIN_CASE */
void mbedtls_base64_encode(char *src_string, char *dst_string,
int dst_buf_size, int result)
{
unsigned char src_str[1000];
unsigned char dst_str[1000];
size_t len, src_len;
memset(src_str, 0x00, 1000);
memset(dst_str, 0x00, 1000);
strncpy((char *) src_str, src_string, sizeof(src_str) - 1);
src_len = strlen((char *) src_str);
TEST_CF_SECRET(src_str, sizeof(src_str));
TEST_ASSERT(mbedtls_base64_encode(dst_str, dst_buf_size, &len, src_str, src_len) == result);
TEST_CF_PUBLIC(src_str, sizeof(src_str));
/* dest_str will have had tainted data copied to it, prevent the TEST_ASSERT below from triggering
CF failures by unmarking it. */
TEST_CF_PUBLIC(dst_str, len);
if (result == 0) {
TEST_ASSERT(strcmp((char *) dst_str, dst_string) == 0);
}
}
/* END_CASE */
/* BEGIN_CASE */
void mbedtls_base64_decode(char *src_string, char *dst_string, int result)
{
unsigned char *src = NULL;
size_t src_len = strlen(src_string);
unsigned char *dst = NULL;
size_t correct_dst_len = strlen(dst_string);
size_t dst_size = correct_dst_len;
size_t len;
/* Allocate exactly the size of the input, to ensure there's no buffer
* overread in builds with ASan. (src_string has at least one extra null
* character at the end.) */
TEST_CALLOC(src, src_len);
if (src_len != 0) {
memcpy(src, src_string, src_len);
}
/* Allocate exactly the size of the input, to ensure there's no buffer
* overflow in builds with ASan. */
TEST_CALLOC(dst, dst_size);
/* Test normal operation */
TEST_EQUAL(mbedtls_base64_decode(dst, dst_size, &len,
src, src_len),
result);
if (result == 0) {
TEST_MEMORY_COMPARE(dst_string, correct_dst_len, dst, len);
}
/* Test an output buffer that's one byte too small */
if (result == 0 && dst_size != 0) {
mbedtls_free(dst);
dst = NULL;
TEST_CALLOC(dst, dst_size - 1);
TEST_EQUAL(mbedtls_base64_decode(dst, dst_size - 1, &len,
src, src_len),
MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL);
TEST_EQUAL(correct_dst_len, len);
}
/* Test an empty output buffer. `mbedtls_base64_decode()` must return
* `BUFFER_TOO_SMALL` but report the correct output length.
* Skip this when dst_size==0 since that would be a valid call to
* `mbedtls_base64_decode()` which should return 0.
*/
if (result == 0 && dst_size != 0) {
TEST_EQUAL(mbedtls_base64_decode(NULL, 0, &len,
src, src_len),
MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL);
TEST_EQUAL(correct_dst_len, len);
}
/* Test dst=NULL with dlen!=0 (explicitly documented as supported) */
if (result == 0 && dst_size != 0) {
TEST_EQUAL(mbedtls_base64_decode(NULL, 42, &len,
src, src_len),
MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL);
TEST_EQUAL(correct_dst_len, len);
}
exit:
mbedtls_free(src);
mbedtls_free(dst);
}
/* END_CASE */
/* BEGIN_CASE */
void base64_encode_hex(data_t *src, char *dst, int dst_buf_size,
int result)
{
unsigned char *res = NULL;
size_t len;
res = mbedtls_test_zero_alloc(dst_buf_size);
TEST_CF_SECRET(src->x, src->len);
TEST_ASSERT(mbedtls_base64_encode(res, dst_buf_size, &len, src->x, src->len) == result);
TEST_CF_PUBLIC(src->x, src->len);
/* res will have had tainted data copied to it, prevent the TEST_ASSERT below from triggering
CF failures by unmarking it. */
TEST_CF_PUBLIC(res, len);
if (result == 0) {
TEST_ASSERT(len == strlen(dst));
TEST_ASSERT(memcmp(dst, res, len) == 0);
}
exit:
mbedtls_free(res);
}
/* END_CASE */
/* BEGIN_CASE */
void base64_decode_hex(char *src, data_t *dst, int dst_buf_size,
int result)
{
unsigned char *res = NULL;
size_t len;
res = mbedtls_test_zero_alloc(dst_buf_size);
TEST_ASSERT(mbedtls_base64_decode(res, dst_buf_size, &len, (unsigned char *) src,
strlen(src)) == result);
if (result == 0) {
TEST_ASSERT(len == dst->len);
TEST_ASSERT(memcmp(dst->x, res, len) == 0);
}
exit:
mbedtls_free(res);
}
/* END_CASE */
/* BEGIN_CASE */
void base64_decode_hex_src(data_t *src, char *dst_ref, int result)
{
unsigned char dst[1000] = { 0 };
size_t len;
TEST_ASSERT(mbedtls_base64_decode(dst, sizeof(dst), &len, src->x, src->len) == result);
if (result == 0) {
TEST_ASSERT(len == strlen(dst_ref));
TEST_ASSERT(memcmp(dst, dst_ref, len) == 0);
}
exit:
;;
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST */
void base64_selftest()
{
TEST_ASSERT(mbedtls_base64_self_test(1) == 0);
}
/* END_CASE */
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