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https://gitlab.torproject.org/tpo/core/tor.git
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123 lines
3.6 KiB
C
123 lines
3.6 KiB
C
/* Copyright (c) 2001-2004, Roger Dingledine.
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* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
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* Copyright (c) 2007-2018, The Tor Project, Inc. */
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/* See LICENSE for licensing information */
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#include "orconfig.h"
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#include "lib/encoding/pem.h"
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#include "lib/cc/compat_compiler.h"
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#include "lib/malloc/malloc.h"
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#include "test/test.h"
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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static const char example_pre[] =
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"Lest you get the wrong impression, we wombats "
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"are not in the habit of tunneling madly about, without any supplies "
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"or even a map."; /* -- Ursula Vernon, _Digger_ */
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static const char expected[] =
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"-----BEGIN WOMBAT QUOTE-----\n"
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"TGVzdCB5b3UgZ2V0IHRoZSB3cm9uZyBpbXByZXNzaW9uLCB3ZSB3b21iYXRzIGFy\n"
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"ZSBub3QgaW4gdGhlIGhhYml0IG9mIHR1bm5lbGluZyBtYWRseSBhYm91dCwgd2l0\n"
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"aG91dCBhbnkgc3VwcGxpZXMgb3IgZXZlbiBhIG1hcC4=\n"
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"-----END WOMBAT QUOTE-----\n";
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static void
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test_crypto_pem_encode(void *arg)
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{
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(void)arg;
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char buf[4096];
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int n = (int) pem_encoded_size(strlen(example_pre), "WOMBAT QUOTE");
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int n2 = pem_encode(buf, sizeof(buf),
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(const unsigned char *)example_pre, strlen(example_pre),
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"WOMBAT QUOTE");
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tt_int_op(strlen(buf)+1, OP_EQ, n);
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tt_int_op(n2, OP_EQ, 0);
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tt_str_op(buf, OP_EQ, expected);
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/* Now make sure it succeeds if the buffer is exactly the length we want. */
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memset(buf, 0, sizeof(buf));
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n2 = pem_encode(buf, n, (const unsigned char *)example_pre,
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strlen(example_pre), "WOMBAT QUOTE");
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tt_int_op(n2, OP_EQ, 0);
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tt_str_op(buf, OP_EQ, expected);
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/* Make sure it fails if the buffer is too short. */
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memset(buf, 0, sizeof(buf));
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n2 = pem_encode(buf, n - 1, (const unsigned char *)example_pre,
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strlen(example_pre), "WOMBAT QUOTE");
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tt_int_op(n2, OP_EQ, -1);
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done:
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;
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}
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static void
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test_crypto_pem_decode(void *arg)
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{
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(void)arg;
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unsigned char buf[4096];
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/* Try a straightforward decoding. */
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int n = pem_decode(buf, sizeof(buf),
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expected, strlen(expected),
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"WOMBAT QUOTE");
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tt_int_op(n, OP_EQ, strlen(example_pre));
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tt_mem_op(buf, OP_EQ, example_pre, n);
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/* Succeed if the buffer is exactly the right size. */
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memset(buf, 0xff, sizeof(buf));
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n = pem_decode(buf, strlen(example_pre),
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expected, strlen(expected),
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"WOMBAT QUOTE");
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tt_int_op(n, OP_EQ, strlen(example_pre));
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tt_mem_op(buf, OP_EQ, example_pre, n);
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tt_int_op(buf[n], OP_EQ, 0xff);
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/* Verify that it fails if the buffer is too small. */
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memset(buf, 0xff, sizeof(buf));
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n = pem_decode(buf, strlen(example_pre) - 1,
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expected, strlen(expected),
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"WOMBAT QUOTE");
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tt_int_op(n, OP_EQ, -1);
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/* Verify that it fails with an incorrect tag. */
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memset(buf, 0xff, sizeof(buf));
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n = pem_decode(buf, sizeof(buf),
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expected, strlen(expected),
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"QUOKKA VOTE");
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tt_int_op(n, OP_EQ, -1);
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/* Try truncated buffers of different sizes. */
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size_t i;
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for (i = 0; i <= strlen(expected); ++i) {
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char *truncated = tor_memdup(expected, i);
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n = pem_decode(buf, sizeof(buf),
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truncated, i,
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"WOMBAT QUOTE");
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tor_free(truncated);
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if (i < strlen(expected) - 1) {
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tt_int_op(n, OP_EQ, -1);
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} else {
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tt_int_op(n, OP_EQ, strlen(example_pre));
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}
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}
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done:
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;
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}
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struct testcase_t pem_tests[] = {
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{ "encode", test_crypto_pem_encode, 0, NULL, NULL },
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{ "decode", test_crypto_pem_decode, 0, NULL, NULL },
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END_OF_TESTCASES
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};
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