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punycode_test.c
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/*
* Copyright 2022-2023 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <openssl/crypto.h>
#include <string.h>
#include "crypto/punycode.h"
#include "internal/nelem.h"
#include "internal/packet.h"
#include "testutil.h"
static const struct puny_test {
unsigned int raw[50];
const char *encoded;
} puny_cases[] = {
{ /* Test of 4 byte codepoint using smileyface emoji */
{ 0x1F600
},
"e28h"
},
/* Test cases from RFC 3492 */
{ /* Arabic (Egyptian) */
{ 0x0644, 0x064A, 0x0647, 0x0645, 0x0627, 0x0628, 0x062A, 0x0643, 0x0644,
0x0645, 0x0648, 0x0634, 0x0639, 0x0631, 0x0628, 0x064A, 0x061F
},
"egbpdaj6bu4bxfgehfvwxn"
},
{ /* Chinese (simplified) */
{ 0x4ED6, 0x4EEC, 0x4E3A, 0x4EC0, 0x4E48, 0x4E0D, 0x8BF4, 0x4E2D, 0x6587
},
"ihqwcrb4cv8a8dqg056pqjye"
},
{ /* Chinese (traditional) */
{ 0x4ED6, 0x5011, 0x7232, 0x4EC0, 0x9EBD, 0x4E0D, 0x8AAA, 0x4E2D, 0x6587
},
"ihqwctvzc91f659drss3x8bo0yb"
},
{ /* Czech: Pro<ccaron>prost<ecaron>nemluv<iacute><ccaron>esky */
{ 0x0050, 0x0072, 0x006F, 0x010D, 0x0070, 0x0072, 0x006F, 0x0073, 0x0074,
0x011B, 0x006E, 0x0065, 0x006D, 0x006C, 0x0075, 0x0076, 0x00ED, 0x010D,
0x0065, 0x0073, 0x006B, 0x0079
},
"Proprostnemluvesky-uyb24dma41a"
},
{ /* Hebrew */
{ 0x05DC, 0x05DE, 0x05D4, 0x05D4, 0x05DD, 0x05E4, 0x05E9, 0x05D5, 0x05D8,
0x05DC, 0x05D0, 0x05DE, 0x05D3, 0x05D1, 0x05E8, 0x05D9, 0x05DD, 0x05E2,
0x05D1, 0x05E8, 0x05D9, 0x05EA
},
"4dbcagdahymbxekheh6e0a7fei0b"
},
{ /* Hindi (Devanagari) */
{ 0x092F, 0x0939, 0x0932, 0x094B, 0x0917, 0x0939, 0x093F, 0x0928, 0x094D,
0x0926, 0x0940, 0x0915, 0x094D, 0x092F, 0x094B, 0x0902, 0x0928, 0x0939,
0x0940, 0x0902, 0x092C, 0x094B, 0x0932, 0x0938, 0x0915, 0x0924, 0x0947,
0x0939, 0x0948, 0x0902
},
"i1baa7eci9glrd9b2ae1bj0hfcgg6iyaf8o0a1dig0cd"
},
{ /* Japanese (kanji and hiragana) */
{ 0x306A, 0x305C, 0x307F, 0x3093, 0x306A, 0x65E5, 0x672C, 0x8A9E, 0x3092,
0x8A71, 0x3057, 0x3066, 0x304F, 0x308C, 0x306A, 0x3044, 0x306E, 0x304B
},
"n8jok5ay5dzabd5bym9f0cm5685rrjetr6pdxa"
},
{ /* Korean (Hangul syllables) */
{ 0xC138, 0xACC4, 0xC758, 0xBAA8, 0xB4E0, 0xC0AC, 0xB78C, 0xB4E4, 0xC774,
0xD55C, 0xAD6D, 0xC5B4, 0xB97C, 0xC774, 0xD574, 0xD55C, 0xB2E4, 0xBA74,
0xC5BC, 0xB9C8, 0xB098, 0xC88B, 0xC744, 0xAE4C
},
"989aomsvi5e83db1d2a355cv1e0vak1dwrv93d5xbh15a0dt30a5jpsd879ccm6fea98c"
},
{ /* Russian (Cyrillic) */
{ 0x043F, 0x043E, 0x0447, 0x0435, 0x043C, 0x0443, 0x0436, 0x0435, 0x043E,
0x043D, 0x0438, 0x043D, 0x0435, 0x0433, 0x043E, 0x0432, 0x043E, 0x0440,
0x044F, 0x0442, 0x043F, 0x043E, 0x0440, 0x0443, 0x0441, 0x0441, 0x043A,
0x0438
},
"b1abfaaepdrnnbgefbaDotcwatmq2g4l"
},
{ /* Spanish */
{ 0x0050, 0x006F, 0x0072, 0x0071, 0x0075, 0x00E9, 0x006E, 0x006F, 0x0070,
0x0075, 0x0065, 0x0064, 0x0065, 0x006E, 0x0073, 0x0069, 0x006D, 0x0070,
0x006C, 0x0065, 0x006D, 0x0065, 0x006E, 0x0074, 0x0065, 0x0068, 0x0061,
0x0062, 0x006C, 0x0061, 0x0072, 0x0065, 0x006E, 0x0045, 0x0073, 0x0070,
0x0061, 0x00F1, 0x006F, 0x006C
},
"PorqunopuedensimplementehablarenEspaol-fmd56a"
},
{ /* Vietnamese */
{ 0x0054, 0x1EA1, 0x0069, 0x0073, 0x0061, 0x006F, 0x0068, 0x1ECD, 0x006B,
0x0068, 0x00F4, 0x006E, 0x0067, 0x0074, 0x0068, 0x1EC3, 0x0063, 0x0068,
0x1EC9, 0x006E, 0x00F3, 0x0069, 0x0074, 0x0069, 0x1EBF, 0x006E, 0x0067,
0x0056, 0x0069, 0x1EC7, 0x0074
},
"TisaohkhngthchnitingVit-kjcr8268qyxafd2f1b9g"
},
{ /* Japanese: 3<nen>B<gumi><kinpachi><sensei> */
{ 0x0033, 0x5E74, 0x0042, 0x7D44, 0x91D1, 0x516B, 0x5148, 0x751F
},
"3B-ww4c5e180e575a65lsy2b"
},
{ /* Japanese: <amuro><namie>-with-SUPER-MONKEYS */
{ 0x5B89, 0x5BA4, 0x5948, 0x7F8E, 0x6075, 0x002D, 0x0077, 0x0069, 0x0074,
0x0068, 0x002D, 0x0053, 0x0055, 0x0050, 0x0045, 0x0052, 0x002D, 0x004D,
0x004F, 0x004E, 0x004B, 0x0045, 0x0059, 0x0053
},
"-with-SUPER-MONKEYS-pc58ag80a8qai00g7n9n"
},
{ /* Japanese: Hello-Another-Way-<sorezore><no><basho> */
{ 0x0048, 0x0065, 0x006C, 0x006C, 0x006F, 0x002D, 0x0041, 0x006E, 0x006F,
0x0074, 0x0068, 0x0065, 0x0072, 0x002D, 0x0057, 0x0061, 0x0079, 0x002D,
0x305D, 0x308C, 0x305E, 0x308C, 0x306E, 0x5834, 0x6240
},
"Hello-Another-Way--fc4qua05auwb3674vfr0b"
},
{ /* Japanese: <hitotsu><yane><no><shita>2 */
{ 0x3072, 0x3068, 0x3064, 0x5C4B, 0x6839, 0x306E, 0x4E0B, 0x0032
},
"2-u9tlzr9756bt3uc0v"
},
{ /* Japanese: Maji<de>Koi<suru>5<byou><mae> */
{ 0x004D, 0x0061, 0x006A, 0x0069, 0x3067, 0x004B, 0x006F, 0x0069, 0x3059,
0x308B, 0x0035, 0x79D2, 0x524D
},
"MajiKoi5-783gue6qz075azm5e"
},
{ /* Japanese: <pafii>de<runba> */
{ 0x30D1, 0x30D5, 0x30A3, 0x30FC, 0x0064, 0x0065, 0x30EB, 0x30F3, 0x30D0
},
"de-jg4avhby1noc0d"
},
{ /* Japanese: <sono><supiido><de> */
{ 0x305D, 0x306E, 0x30B9, 0x30D4, 0x30FC, 0x30C9, 0x3067
},
"d9juau41awczczp"
},
{ /* -> $1.00 <- */
{ 0x002D, 0x003E, 0x0020, 0x0024, 0x0031, 0x002E, 0x0030, 0x0030, 0x0020,
0x003C, 0x002D
},
"-> $1.00 <--"
}
};
static int test_punycode(int n)
{
const struct puny_test *tc = puny_cases + n;
unsigned int buffer[50];
unsigned int bsize = OSSL_NELEM(buffer);
size_t i;
if (!TEST_true(ossl_punycode_decode(tc->encoded, strlen(tc->encoded),
buffer, &bsize)))
return 0;
for (i = 0; i < OSSL_NELEM(tc->raw); i++)
if (tc->raw[i] == 0)
break;
if (!TEST_mem_eq(buffer, bsize * sizeof(*buffer),
tc->raw, i * sizeof(*tc->raw)))
return 0;
return 1;
}
static const struct bad_decode_test {
size_t outlen;
const char input[20];
} bad_decode_tests[] = {
{ 20, "xn--e-*" }, /* bad digit '*' */
{ 10, "xn--e-999" }, /* loop > enc_len */
{ 20, "xn--e-999999999" }, /* Too big */
{ 20, {'x', 'n', '-', '-', (char)0x80, '-' } }, /* Not basic */
{ 20, "xn--e-Oy65t" }, /* codepoint > 0x10FFFF */
};
static int test_a2ulabel_bad_decode(int tst)
{
char out[20];
return TEST_int_eq(ossl_a2ulabel(bad_decode_tests[tst].input, out, bad_decode_tests[tst].outlen), -1);
}
static int test_a2ulabel(void)
{
char out[50];
char in[530] = { 0 };
/*
* The punycode being passed in and parsed is malformed but we're not
* verifying that behaviour here.
*/
if (!TEST_int_eq(ossl_a2ulabel("xn--a.b.c", out, 1), 0)
|| !TEST_int_eq(ossl_a2ulabel("xn--a.b.c", out, 7), 1))
return 0;
/* Test for an off by one on the buffer size works */
if (!TEST_int_eq(ossl_a2ulabel("xn--a.b.c", out, 6), 0)
|| !TEST_int_eq(ossl_a2ulabel("xn--a.b.c", out, 7), 1)
|| !TEST_str_eq(out,"\xc2\x80.b.c"))
return 0;
/* Test 4 byte smiley face */
if (!TEST_int_eq(ossl_a2ulabel("xn--e28h.com", out, 10), 1))
return 0;
/* Test that we dont overflow the fixed internal buffer of 512 bytes when the starting bytes are copied */
strcpy(in, "xn--");
memset(in + 4, 'e', 513);
memcpy(in + 517, "-3ya", 4);
if (!TEST_int_eq(ossl_a2ulabel(in, out, 50), -1))
return 0;
return 1;
}
static int test_puny_overrun(void)
{
static const unsigned int out[] = {
0x0033, 0x5E74, 0x0042, 0x7D44, 0x91D1, 0x516B, 0x5148, 0x751F
};
static const char *in = "3B-ww4c5e180e575a65lsy2b";
unsigned int buf[OSSL_NELEM(out)];
unsigned int bsize = OSSL_NELEM(buf) - 1;
if (!TEST_false(ossl_punycode_decode(in, strlen(in), buf, &bsize))) {
if (TEST_mem_eq(buf, bsize * sizeof(*buf), out, sizeof(out)))
TEST_error("CRITICAL: buffer overrun detected!");
return 0;
}
return 1;
}
static int test_dotted_overflow(void)
{
static const char string[] = "a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a";
const size_t num_reps = OSSL_NELEM(string) / 2;
WPACKET p;
BUF_MEM *in;
char *out = NULL;
size_t i;
int res = 0;
/* Create out input punycode string */
if (!TEST_ptr(in = BUF_MEM_new()))
return 0;
if (!TEST_true(WPACKET_init_len(&p, in, 0))) {
BUF_MEM_free(in);
return 0;
}
for (i = 0; i < num_reps; i++) {
if (i > 1 && !TEST_true(WPACKET_put_bytes_u8(&p, '.')))
goto err;
if (!TEST_true(WPACKET_memcpy(&p, "xn--a", sizeof("xn--a") - 1)))
goto err;
}
if (!TEST_true(WPACKET_put_bytes_u8(&p, '\0')))
goto err;
if (!TEST_ptr(out = OPENSSL_malloc(in->length)))
goto err;
/* Test the decode into an undersized buffer */
memset(out, 0x7f, in->length - 1);
if (!TEST_int_le(ossl_a2ulabel(in->data, out, num_reps), 0)
|| !TEST_int_eq(out[num_reps], 0x7f))
goto err;
/* Test the decode works into a full size buffer */
if (!TEST_int_gt(ossl_a2ulabel(in->data, out, in->length), 0)
|| !TEST_size_t_eq(strlen(out), num_reps * 3))
goto err;
res = 1;
err:
WPACKET_cleanup(&p);
BUF_MEM_free(in);
OPENSSL_free(out);
return res;
}
int setup_tests(void)
{
ADD_ALL_TESTS(test_punycode, OSSL_NELEM(puny_cases));
ADD_TEST(test_dotted_overflow);
ADD_TEST(test_a2ulabel);
ADD_TEST(test_puny_overrun);
ADD_ALL_TESTS(test_a2ulabel_bad_decode, OSSL_NELEM(bad_decode_tests));
return 1;
}