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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_b64.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 "AAAB" */
char buf[100];
unsigned char result[10];
char endian[] = { (char)0, (char)0, (char)1 };
size_t d = modp_b64_encode(buf, endian, (size_t)3);
mu_assert_int_equals(4, d);
mu_assert_int_equals('A', buf[0]);
mu_assert_int_equals('A', buf[1]);
mu_assert_int_equals('A', buf[2]);
mu_assert_int_equals('B', buf[3]);
memset(result, 255, sizeof(result));
d = modp_b64_decode(result, "AAAB", (size_t)4);
mu_assert_int_equals(3, d);
mu_assert_int_equals(0, result[0]);
mu_assert_int_equals(0, result[1]);
mu_assert_int_equals(1, result[2]);
mu_assert_int_equals(255, result[3]);
return 0;
}
/**
* sending 0 as length to encode and decode
* should basically do nothing
*/
static char* testEmpty(void)
{
char buf[10];
const char* input = 0; /* null */
size_t d;
memset(buf, 1, sizeof(buf));
d = modp_b64_encode(buf, input, (size_t)0);
mu_assert_int_equals(0, d);
mu_assert_int_equals(0, buf[0]);
mu_assert_int_equals(1, buf[1]);
memset(buf, 1, sizeof(buf));
d = modp_b64_decode(buf, input, (size_t)0);
mu_assert_int_equals(0, d);
mu_assert_int_equals(1, buf[0]);
mu_assert_int_equals(1, buf[1]);
return 0;
}
/**
* Test 1-6 bytes input and decode
*
*/
static char* testPadding(void)
{
char msg[100];
const char ibuf[6] = { 1, 1, 1, 1, 1, 1 };
char obuf[10];
unsigned char rbuf[10];
size_t d = 0;
/* 1 in, 4 out */
memset(obuf, 255, sizeof(obuf));
d = modp_b64_encode(obuf, ibuf, (size_t)1);
sprintf(msg, "b64='%s', d=%d", obuf, (int)d);
mu_assert_int_equals_msg(msg, 4, d);
mu_assert_int_equals_msg(msg, 0, obuf[4]);
memset(rbuf, 255, sizeof(rbuf));
d = modp_b64_decode(rbuf, obuf, d);
mu_assert_int_equals_msg(msg, 1, d);
mu_assert_int_equals(1, rbuf[0]);
mu_assert_int_equals(255, rbuf[1]);
/* 2 in, 4 out */
memset(obuf, 255, sizeof(obuf));
d = modp_b64_encode(obuf, ibuf, (size_t)2);
sprintf(msg, "b64='%s', d=%d", obuf, (int)d);
mu_assert_int_equals_msg(msg, 4, d);
mu_assert_int_equals_msg(msg, 0, obuf[4]);
memset(rbuf, 255, sizeof(rbuf));
d = modp_b64_decode(rbuf, obuf, d);
mu_assert_int_equals_msg(msg, 2, d);
mu_assert_int_equals_msg(msg, 1, rbuf[0]);
mu_assert_int_equals_msg(msg, 1, rbuf[1]);
mu_assert_int_equals_msg(msg, 255, rbuf[2]);
/* 3 in, 4 out */
memset(obuf, 255, sizeof(obuf));
d = modp_b64_encode(obuf, ibuf, (size_t)3);
sprintf(msg, "b64='%s', d=%d", obuf, (int)d);
mu_assert_int_equals_msg(msg, 4, d);
mu_assert_int_equals_msg(msg, 0, obuf[4]);
memset(rbuf, 255, sizeof(rbuf));
d = modp_b64_decode(rbuf, obuf, d);
mu_assert_int_equals_msg(msg, 3, d);
mu_assert_int_equals_msg(msg, 1, rbuf[0]);
mu_assert_int_equals_msg(msg, 1, rbuf[1]);
mu_assert_int_equals_msg(msg, 1, rbuf[2]);
mu_assert_int_equals_msg(msg, 255, rbuf[3]);
/* 4 in, 8 out */
memset(obuf, 255, sizeof(obuf));
d = modp_b64_encode(obuf, ibuf, (size_t)4);
sprintf(msg, "b64='%s', d=%d", obuf, (int)d);
mu_assert_int_equals_msg(msg, 8, d);
mu_assert_int_equals_msg(msg, 0, obuf[8]);
memset(rbuf, 255, sizeof(rbuf));
d = modp_b64_decode(rbuf, obuf, d);
mu_assert_int_equals(4, d);
mu_assert_int_equals(1, rbuf[0]);
mu_assert_int_equals(1, rbuf[1]);
mu_assert_int_equals(1, rbuf[2]);
mu_assert_int_equals(1, rbuf[3]);
mu_assert_int_equals(255, rbuf[4]);
/* 5 in, 8 out */
memset(obuf, 255, sizeof(obuf));
d = modp_b64_encode(obuf, ibuf, (size_t)5);
sprintf(msg, "b64='%s', d=%d", obuf, (int)d);
mu_assert_int_equals_msg(msg, 8, d);
mu_assert_int_equals_msg(msg, 0, obuf[8]);
memset(rbuf, 255, sizeof(rbuf));
d = modp_b64_decode(rbuf, obuf, d);
mu_assert_int_equals(5, d);
mu_assert_int_equals(1, rbuf[0]);
mu_assert_int_equals(1, rbuf[1]);
mu_assert_int_equals(1, rbuf[2]);
mu_assert_int_equals(1, rbuf[3]);
mu_assert_int_equals(1, rbuf[4]);
mu_assert_int_equals(255, rbuf[5]);
/* 6 in, 8 out */
memset(obuf, 255, sizeof(obuf));
d = modp_b64_encode(obuf, ibuf, (size_t)6);
sprintf(msg, "b64='%s', d=%d", obuf, (int)d);
mu_assert_int_equals_msg(msg, 8, d);
mu_assert_int_equals_msg(msg, 0, obuf[8]);
memset(rbuf, 255, sizeof(rbuf));
d = modp_b64_decode(rbuf, obuf, d);
mu_assert_int_equals(6, d);
mu_assert_int_equals(1, rbuf[0]);
mu_assert_int_equals(1, rbuf[1]);
mu_assert_int_equals(1, rbuf[2]);
mu_assert_int_equals(1, rbuf[3]);
mu_assert_int_equals(1, rbuf[4]);
mu_assert_int_equals(1, rbuf[5]);
mu_assert_int_equals(255, rbuf[6]);
return 0;
}
/**
* Test all 17M 3 bytes inputs to encoder, decode
* and make sure it's equal.
*/
static char* testEncodeDecode(void)
{
char ibuf[4];
char obuf[5];
char rbuf[4];
char msg[100];
msg[0] = 0; /* make msg an empty string */
unsigned int i, j, k;
size_t d = 0;
for (i = 0; i < 256; ++i) {
for (j = 0; j < 256; ++j) {
for (k = 0; k < 256; ++k) {
/* comment this out.. it really slows down the test */
/* sprintf(msg, "(i,j,k) = (%d,%d,%d):", i,j,k); */
ibuf[0] = (char)((unsigned char)i);
ibuf[1] = (char)((unsigned char)j);
ibuf[2] = (char)((unsigned char)k);
ibuf[3] = 0;
memset(obuf, 1, sizeof(obuf));
d = modp_b64_encode(obuf, ibuf, (size_t)3);
mu_assert_int_equals_msg(msg, 4, d);
mu_assert_int_equals_msg(msg, 0, obuf[4]);
memset(rbuf, 1, sizeof(rbuf));
d = modp_b64_decode(rbuf, obuf, (size_t)4);
mu_assert_int_equals_msg(msg, 3, d);
mu_assert_int_equals_msg(msg, ibuf[0], rbuf[0]);
mu_assert_int_equals_msg(msg, ibuf[1], rbuf[1]);
mu_assert_int_equals_msg(msg, ibuf[2], rbuf[2]);
mu_assert_int_equals_msg(msg, 1, rbuf[3]);
}
}
}
return 0;
}
static char* testDecodeErrors(void)
{
int i;
size_t y;
char out[1000];
char decode[5];
char msg[100];
/* negative length */
memset(decode, 1, sizeof(decode));
y = modp_b64_decode(out, decode, (size_t)-1);
mu_assert_int_equals(-1, y);
/* test bad input - all combinations */
char goodchar = 'A';
char badchar = '~';
for (i = 1; i < 16; ++i) {
decode[0] = (char)(((i & 0x01) == 0) ? goodchar : badchar);
decode[1] = (char)(((i & 0x02) == 0) ? goodchar : badchar);
decode[2] = (char)(((i & 0x04) == 0) ? goodchar : badchar);
decode[3] = (char)(((i & 0x08) == 0) ? goodchar : badchar);
decode[4] = '\0';
sprintf(msg, "i = %d, %s", i, decode);
y = modp_b64_decode(out, decode, (size_t)4);
mu_assert_int_equals_msg(msg, (size_t)-1, y);
}
/* test just 1-4 padchars */
for (i = 0; i < 4; ++i) {
decode[i] = '=';
decode[i + 1] = '\0';
y = modp_b64_decode(out, decode, (size_t)(i + 1));
sprintf(msg, "i=%d, b64=%s", i, decode);
mu_assert_int_equals_msg(msg, (size_t)-1, y);
}
/* Test good+3 pad chars (should be impossible) */
decode[0] = 'A';
decode[1] = '=';
decode[2] = '=';
decode[3] = '=';
y = modp_b64_decode(out, decode, (size_t)4);
mu_assert_int_equals(-1, y);
return 0;
}
static char* all_tests(void)
{
mu_run_test(testEndian);
mu_run_test(testEmpty);
mu_run_test(testPadding);
mu_run_test(testEncodeDecode);
mu_run_test(testDecodeErrors);
return 0;
}
UNITTESTS
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