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/* Copyright (c) 2001-2004, Roger Dingledine.
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2020, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#include "orconfig.h"
#include "lib/encoding/pem.h"
#include "lib/cc/compat_compiler.h"
#include "lib/malloc/malloc.h"
#include "test/test.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
static const char example_pre[] =
"Lest you get the wrong impression, we wombats "
"are not in the habit of tunneling madly about, without any supplies "
"or even a map."; /* -- Ursula Vernon, _Digger_ */
static const char expected[] =
"-----BEGIN WOMBAT QUOTE-----\n"
"TGVzdCB5b3UgZ2V0IHRoZSB3cm9uZyBpbXByZXNzaW9uLCB3ZSB3b21iYXRzIGFy\n"
"ZSBub3QgaW4gdGhlIGhhYml0IG9mIHR1bm5lbGluZyBtYWRseSBhYm91dCwgd2l0\n"
"aG91dCBhbnkgc3VwcGxpZXMgb3IgZXZlbiBhIG1hcC4=\n"
"-----END WOMBAT QUOTE-----\n";
static void
test_crypto_pem_encode(void *arg)
{
(void)arg;
char buf[4096];
int n = (int) pem_encoded_size(strlen(example_pre), "WOMBAT QUOTE");
int n2 = pem_encode(buf, sizeof(buf),
(const unsigned char *)example_pre, strlen(example_pre),
"WOMBAT QUOTE");
tt_int_op(strlen(buf)+1, OP_EQ, n);
tt_int_op(n2, OP_EQ, 0);
tt_str_op(buf, OP_EQ, expected);
/* Now make sure it succeeds if the buffer is exactly the length we want. */
memset(buf, 0, sizeof(buf));
n2 = pem_encode(buf, n, (const unsigned char *)example_pre,
strlen(example_pre), "WOMBAT QUOTE");
tt_int_op(n2, OP_EQ, 0);
tt_str_op(buf, OP_EQ, expected);
/* Make sure it fails if the buffer is too short. */
memset(buf, 0, sizeof(buf));
n2 = pem_encode(buf, n - 1, (const unsigned char *)example_pre,
strlen(example_pre), "WOMBAT QUOTE");
tt_int_op(n2, OP_EQ, -1);
done:
;
}
static void
test_crypto_pem_decode(void *arg)
{
(void)arg;
unsigned char buf[4096];
/* Try a straightforward decoding. */
int n = pem_decode(buf, sizeof(buf),
expected, strlen(expected),
"WOMBAT QUOTE");
tt_int_op(n, OP_EQ, strlen(example_pre));
tt_mem_op(buf, OP_EQ, example_pre, n);
/* Succeed if the buffer is exactly the right size. */
memset(buf, 0xff, sizeof(buf));
n = pem_decode(buf, strlen(example_pre),
expected, strlen(expected),
"WOMBAT QUOTE");
tt_int_op(n, OP_EQ, strlen(example_pre));
tt_mem_op(buf, OP_EQ, example_pre, n);
tt_int_op(buf[n], OP_EQ, 0xff);
/* Verify that it fails if the buffer is too small. */
memset(buf, 0xff, sizeof(buf));
n = pem_decode(buf, strlen(example_pre) - 1,
expected, strlen(expected),
"WOMBAT QUOTE");
tt_int_op(n, OP_EQ, -1);
/* Verify that it fails with an incorrect tag. */
memset(buf, 0xff, sizeof(buf));
n = pem_decode(buf, sizeof(buf),
expected, strlen(expected),
"QUOKKA VOTE");
tt_int_op(n, OP_EQ, -1);
/* Try truncated buffers of different sizes. */
size_t i;
for (i = 0; i <= strlen(expected); ++i) {
char *truncated = tor_memdup(expected, i);
n = pem_decode(buf, sizeof(buf),
truncated, i,
"WOMBAT QUOTE");
tor_free(truncated);
if (i < strlen(expected) - 1) {
tt_int_op(n, OP_EQ, -1);
} else {
tt_int_op(n, OP_EQ, strlen(example_pre));
}
}
done:
;
}
static void
test_crypto_pem_decode_crlf(void *arg)
{
(void)arg;
char crlf_version[4096];
uint8_t buf[4096];
/* Convert 'expected' to a version with CRLF instead of LF. */
const char *inp = expected;
char *outp = crlf_version;
while (*inp) {
if (*inp == '\n') {
*outp++ = '\r';
}
*outp++ = *inp++;
}
*outp = 0;
/* Decoding should succeed (or else we have bug 33032 again) */
int n = pem_decode(buf, sizeof(buf),
crlf_version, strlen(crlf_version),
"WOMBAT QUOTE");
tt_int_op(n, OP_EQ, strlen(example_pre));
tt_mem_op(buf, OP_EQ, example_pre, n);
done:
;
}
struct testcase_t pem_tests[] = {
{ "encode", test_crypto_pem_encode, 0, NULL, NULL },
{ "decode", test_crypto_pem_decode, 0, NULL, NULL },
{ "decode_crlf", test_crypto_pem_decode_crlf, 0, NULL, NULL },
END_OF_TESTCASES
};
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