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/* Copyright (c) 2014, Google Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
#include <stdio.h>
#include <string.h>
#include <openssl/base64.h>
#include <openssl/crypto.h>
#include <openssl/err.h>
struct TestVector {
const char *decoded;
const char *encoded;
};
// Test vectors from RFC 4648.
static const TestVector kTestVectors[] = {
{ "", "" },
{ "f" , "Zg==" },
{ "fo", "Zm8=" },
{ "foo", "Zm9v" },
{ "foob", "Zm9vYg==" },
{ "fooba", "Zm9vYmE=" },
{ "foobar", "Zm9vYmFy" },
};
static const size_t kNumTests = sizeof(kTestVectors) / sizeof(kTestVectors[0]);
static bool TestEncode() {
for (size_t i = 0; i < kNumTests; i++) {
const TestVector *t = &kTestVectors[i];
uint8_t out[9];
size_t len = EVP_EncodeBlock(out, (const uint8_t*)t->decoded,
strlen(t->decoded));
if (len != strlen(t->encoded) ||
memcmp(out, t->encoded, len) != 0) {
fprintf(stderr, "encode(\"%s\") = \"%.*s\", want \"%s\"\n",
t->decoded, (int)len, (const char*)out, t->encoded);
return false;
}
}
return true;
}
static bool TestDecode() {
uint8_t out[6];
size_t len;
for (size_t i = 0; i < kNumTests; i++) {
// Test the normal API.
const TestVector *t = &kTestVectors[i];
size_t expected_len = strlen(t->decoded);
if (!EVP_DecodeBase64(out, &len, sizeof(out),
(const uint8_t*)t->encoded, strlen(t->encoded))) {
fprintf(stderr, "decode(\"%s\") failed\n", t->encoded);
return false;
}
if (len != strlen(t->decoded) ||
memcmp(out, t->decoded, len) != 0) {
fprintf(stderr, "decode(\"%s\") = \"%.*s\", want \"%s\"\n",
t->encoded, (int)len, (const char*)out, t->decoded);
return false;
}
// Test that the padding behavior of the deprecated API is preserved.
int ret = EVP_DecodeBlock(out, (const uint8_t*)t->encoded,
strlen(t->encoded));
if (ret < 0) {
fprintf(stderr, "decode(\"%s\") failed\n", t->encoded);
return false;
}
if (ret % 3 != 0) {
fprintf(stderr, "EVP_DecodeBlock did not ignore padding\n");
return false;
}
if (expected_len % 3 != 0) {
ret -= 3 - (expected_len % 3);
}
if (static_cast<size_t>(ret) != strlen(t->decoded) ||
memcmp(out, t->decoded, ret) != 0) {
fprintf(stderr, "decode(\"%s\") = \"%.*s\", want \"%s\"\n",
t->encoded, ret, (const char*)out, t->decoded);
return false;
}
}
if (EVP_DecodeBase64(out, &len, sizeof(out), (const uint8_t*)"a!bc", 4)) {
fprintf(stderr, "Failed to reject invalid characters in the middle.\n");
return false;
}
if (EVP_DecodeBase64(out, &len, sizeof(out), (const uint8_t*)"a=bc", 4)) {
fprintf(stderr, "Failed to reject invalid characters in the middle.\n");
return false;
}
if (EVP_DecodeBase64(out, &len, sizeof(out), (const uint8_t*)"abc", 4)) {
fprintf(stderr, "Failed to reject invalid input length.\n");
return false;
}
return true;
}
int main(void) {
CRYPTO_library_init();
ERR_load_crypto_strings();
if (!TestEncode() ||
!TestDecode()) {
return 1;
}
printf("PASS\n");
return 0;
}
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