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/* we compile as C90 but use snprintf */
#define _ISOC99_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "minunit.h"
#include "modp_b85.h"
/**
* checks to make sure results are the same reguardless of
* CPU endian type (i.e. Intel vs. Sparc, etc)
*
*/
static char* testEndian(void)
{
/* this test that "1" is "!!!!#" */
char buf[100];
unsigned char result[10];
char endian[] = { (char)0, (char)0, (char)0, (char)1 };
size_t d = modp_b85_encode(buf, endian, (size_t)4);
mu_assert_int_equals(5, d);
mu_assert_int_equals('!', buf[0]);
mu_assert_int_equals('!', buf[1]);
mu_assert_int_equals('!', buf[2]);
mu_assert_int_equals('!', buf[3]);
mu_assert_int_equals('#', buf[4]);
memset(result, 255, sizeof(result));
d = modp_b85_decode(result, "!!!!#", (size_t)5);
mu_assert_int_equals(4, d);
mu_assert_int_equals(0, result[0]);
mu_assert_int_equals(0, result[1]);
mu_assert_int_equals(0, result[2]);
mu_assert_int_equals(1, result[3]);
mu_assert_int_equals(255, result[4]);
return 0;
}
static char* testLength(void)
{
/**
* Decode Len
* 5 bytes -> 4 in, no null
*/
mu_assert_int_equals(0, modp_b85_decode_len(0));
mu_assert_int_equals(4, modp_b85_decode_len(5));
mu_assert_int_equals(8, modp_b85_decode_len(10));
/* Encode Len
* 4 byte -> 5 output + 1 null byte
*/
mu_assert_int_equals(1, modp_b85_encode_len(0));
mu_assert_int_equals(6, modp_b85_encode_len(4));
mu_assert_int_equals(11, modp_b85_encode_len(8));
return 0;
}
/** \brief test bad input lengths
* The b85 encode only accepts multiples of 4.
*
* The b85 decoder only accepts a multiple of 5.
*
*/
static char* testBadInputLength(void)
{
char buf[100];
mu_assert_int_equals(-1, modp_b85_encode(buf, buf, (size_t)5));
mu_assert_int_equals(-1, modp_b85_decode(buf, buf, (size_t)11));
return 0;
}
/** \brief test decoding invalid b85 chars
*
*/
static char* testBadCharDecode(void)
{
char buf[] = { 'A', 'B', 'C', 'D', '\n', '\0' };
mu_assert_int_equals(-1, modp_b85_decode(buf, buf, (size_t)5));
return 0;
}
static char* testEncodeDecode(void)
{
unsigned char ibuf[10]; /* input */
unsigned char obuf[10]; /* output */
unsigned char rbuf[10]; /* final result */
size_t d;
int i, j, k, l;
for (i = 0; i < 256; ++i) {
for (j = 0; j < 256; j += 16) { /* save some time +=16 */
for (k = 0; k < 256; k += 8) { /* save some time += 8 */
for (l = 0; l < 256; ++l) {
ibuf[0] = (char)i;
ibuf[1] = (char)j;
ibuf[2] = (char)k;
ibuf[3] = (char)l;
memset(obuf, 255, sizeof(obuf));
d = modp_b85_encode(obuf, ibuf, (size_t)4);
mu_assert_int_equals(5, d);
mu_assert_int_equals(0, obuf[5]);
memset(rbuf, 255, sizeof(rbuf));
d = modp_b85_decode(rbuf, obuf, (size_t)5);
mu_assert_int_equals(4, d);
mu_assert_int_equals(ibuf[0], rbuf[0]);
mu_assert_int_equals(ibuf[1], rbuf[1]);
mu_assert_int_equals(ibuf[2], rbuf[2]);
mu_assert_int_equals(ibuf[3], rbuf[3]);
mu_assert_int_equals(255, rbuf[4]);
}
}
}
}
return 0;
}
static char* all_tests(void)
{
mu_run_test(testEndian);
mu_run_test(testLength);
mu_run_test(testBadInputLength);
mu_run_test(testBadCharDecode);
mu_run_test(testEncodeDecode);
return 0;
}
UNITTESTS
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