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curl-curl/tests/unit/unit1667.c
Daniel Stenberg 14782b36fe
x509asn1: fixed and adapted for ASN1tostr unit testing 
- move defines to header file
- make bit2str require < 8 unused bits
- make bool strings stricter
- make UTime2str show + or - for custom time zones
- removed unused 'type' argument to ASN1tostr() function
- fix int2str for negative values. All values below 10000 are now shown
  in decimal properly, also possibly negative values.

Add unit test 1667 to verify ASN1tostr

Closes #21013
2026-03-20 13:03:40 +01:00

340 lines
14 KiB
C
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#include "unitcheck.h"
#if defined(USE_GNUTLS) || defined(USE_SCHANNEL) || defined(USE_MBEDTLS) || \
defined(USE_RUSTLS)
#include "vtls/x509asn1.h"
#include "vtls/vtls.h"
struct test_1667 {
unsigned char tag;
const char *asn1;
const size_t size;
const char *out;
CURLcode result_exp;
};
/* the size of the object needs to deduct the null terminator */
#define OID(x) x, sizeof(x) - 1
static bool test1667(const struct test_1667 *spec, size_t i,
struct dynbuf *dbuf)
{
CURLcode result;
bool ok = TRUE;
struct Curl_asn1Element elem;
curlx_dyn_reset(dbuf);
/* setup private struct for this invoke */
elem.tag = spec->tag;
elem.header = NULL;
elem.beg = spec->asn1;
elem.end = elem.beg + spec->size;
elem.eclass = 0;
elem.constructed = 0;
result = ASN1tostr(dbuf, &elem);
if(result != spec->result_exp) {
curl_mfprintf(stderr, "test %zu (type %u): expect result %d, got %d\n",
i, spec->tag, spec->result_exp, result);
if(!spec->result_exp) {
curl_mfprintf(stderr, "test %zu: expected output '%s'\n",
i, spec->out);
}
ok = FALSE;
}
else if(!result) {
/* use strlen on the pointer instead of curlx_dyn_len() because for some
of these type, the code explicitly adds a null terminator which is then
counted as buffer size. */
size_t actual_len = strlen(curlx_dyn_ptr(dbuf));
if(strlen(spec->out) != actual_len) {
curl_mfprintf(stderr,
"test %zu (type %u): "
"unexpected length. Got %zu, expected %zu)\n",
i, spec->tag, actual_len, strlen(spec->out));
ok = FALSE;
}
if(strcmp(spec->out, curlx_dyn_ptr(dbuf))) {
size_t loop;
const uint8_t *data = curlx_dyn_uptr(dbuf);
const size_t len = curlx_dyn_len(dbuf);
curl_mfprintf(stderr,
"test %zu (type %u): "
"expected output '%s', got '%s' (length %zu)\n",
i, spec->tag, spec->out, data, len);
for(loop = 0; loop < len; loop++)
curl_mfprintf(stderr, "test %zu: index %zu byte %02x\n",
i, loop, data[loop]);
ok = FALSE;
}
}
return ok;
}
static CURLcode test_unit1667(const char *arg)
{
UNITTEST_BEGIN_SIMPLE
static const struct test_1667 test_specs[] = {
/* unsupported type > CURL_ASN1_BMP_STRING (30) */
{ 31, "abcde", 5, "", CURLE_BAD_FUNCTION_ARGUMENT },
{ 99, "abcde", 5, "", CURLE_BAD_FUNCTION_ARGUMENT },
/*
(many different) strings:
CURL_ASN1_UTF8_STRING
CURL_ASN1_NUMERIC_STRING
CURL_ASN1_PRINTABLE_STRING
CURL_ASN1_TELETEX_STRING
CURL_ASN1_IA5_STRING
CURL_ASN1_VISIBLE_STRING
CURL_ASN1_UNIVERSAL_STRING
CURL_ASN1_BMP_STRING
*/
{ CURL_ASN1_UTF8_STRING, "abcde", 5, "abcde", CURLE_OK },
/* a with ring, a with umlaut, o with umlaut in UTF-8 encoding */
{ CURL_ASN1_UTF8_STRING, "\xc3\xa5\xc3\xa4\xc3\xb6", 6,
"\xc3\xa5\xc3\xa4\xc3\xb6", CURLE_OK },
{ CURL_ASN1_NUMERIC_STRING, "abcde", 5, "abcde", CURLE_OK },
{ CURL_ASN1_PRINTABLE_STRING, "abcde", 5, "abcde", CURLE_OK },
{ CURL_ASN1_TELETEX_STRING, "abcde", 5, "abcde", CURLE_OK },
{ CURL_ASN1_IA5_STRING, "abcde", 5, "abcde", CURLE_OK },
{ CURL_ASN1_VISIBLE_STRING, "abcde", 5, "abcde", CURLE_OK },
{ CURL_ASN1_UNIVERSAL_STRING, "abcde", 5, "abcde",
CURLE_BAD_FUNCTION_ARGUMENT },
{ CURL_ASN1_UNIVERSAL_STRING, "abcd", 4, "abcd",
CURLE_WEIRD_SERVER_REPLY },
{ CURL_ASN1_UNIVERSAL_STRING, "\x00\x00\x12\x34", 4, "\xe1\x88\xb4",
CURLE_OK },
{ CURL_ASN1_BMP_STRING, "abcde", 5, "abcde", CURLE_BAD_FUNCTION_ARGUMENT },
/* Generalized Time */
/* GTime2str() is tested separately in unit test 1656 */
{ CURL_ASN1_GENERALIZED_TIME, "19851106210627.3", 16,
"1985-11-06 21:06:27.3", CURLE_OK },
{ CURL_ASN1_GENERALIZED_TIME, "19851106210627.3Z", 17,
"1985-11-06 21:06:27.3 GMT", CURLE_OK },
{ CURL_ASN1_GENERALIZED_TIME, "19851106210627.3-0500", 21,
"1985-11-06 21:06:27.3 UTC-0500", CURLE_OK },
/* Generalized Time: Invalid month (13). Still fine! */
{ CURL_ASN1_GENERALIZED_TIME, "20231301000000Z", 15,
"2023-13-01 00:00:00 GMT", CURLE_OK },
/* Generalized Time: Valid millisecond precision */
{ CURL_ASN1_GENERALIZED_TIME, "20230101000000.123Z", 19,
"2023-01-01 00:00:00.123 GMT", CURLE_OK },
/* UTC Time */
{ CURL_ASN1_UTC_TIME, "991231235959Z", 13, "1999-12-31 23:59:59 GMT",
CURLE_OK },
{ CURL_ASN1_UTC_TIME, "991231235959+0200", 17, "1999-12-31 23:59:59 +0200",
CURLE_OK },
{ CURL_ASN1_UTC_TIME, "991231235959-0200", 17, "1999-12-31 23:59:59 -0200",
CURLE_OK },
{ CURL_ASN1_UTC_TIME, "991231235959+999", 16, "1999-12-31 23:59:59 +999",
CURLE_OK },
/* Leap year check (Feb 29, 2024) */
{ CURL_ASN1_UTC_TIME, "240229120000Z", 13, "2024-02-29 12:00:00 GMT",
CURLE_OK },
/* Century roll-over (00-49 is 20xx, 50-99 is 19xx) */
{ CURL_ASN1_UTC_TIME, "491231235959Z", 13, "2049-12-31 23:59:59 GMT",
CURLE_OK },
{ CURL_ASN1_UTC_TIME, "500101000000Z", 13, "1950-01-01 00:00:00 GMT",
CURLE_OK },
/* Object Identifier (encodeOID() is tested in unit test 1666) */
/* 1.2.840.10040.4.1 */
{ CURL_ASN1_OBJECT_IDENTIFIER, "\x2A\x86\x48\xCE\x38\x04\x01", 7,
"dsa", CURLE_OK },
/* 1.2.840.113549.1.1.13 */
{ CURL_ASN1_OBJECT_IDENTIFIER, "\x2A\x86\x48\x86\xF7\x0D\x01\x01\x0D", 9,
"sha512WithRSAEncryption", CURLE_OK },
/* 1.2.840.10040.4.2 */
{ CURL_ASN1_OBJECT_IDENTIFIER, "\x2A\x86\x48\xCE\x38\x04\x02", 7,
"1.2.840.10040.4.2", CURLE_OK },
/* 2.16.840.1.101.3.4.2.3 */
{ CURL_ASN1_OBJECT_IDENTIFIER, "\x60\x86\x48\x01\x65\x03\x04\x02\x03", 9,
"sha512", CURLE_OK },
/* 2.999 -> (2*40) + 999 = 1079. 1079 in VLQ is 0x88 0x37 */
{ CURL_ASN1_OBJECT_IDENTIFIER, "\x88\x37\x03", 3, "2.999.3",
CURLE_OK },
/* 1.0 (Minimum possible OID length/value)
(1*40) + 0 = 40 (0x28) */
{ CURL_ASN1_OBJECT_IDENTIFIER, "\x28", 1, "1.0", CURLE_OK },
/* Malformed (Incomplete multi-byte SID, MSB set but no following byte) */
{ CURL_ASN1_OBJECT_IDENTIFIER, "\x88", 1, "",
CURLE_BAD_FUNCTION_ARGUMENT },
/* NULL */
{ CURL_ASN1_NULL, "", 0, "", CURLE_OK },
{ CURL_ASN1_NULL, "a", 1, "", CURLE_OK },
{ CURL_ASN1_NULL, "aa", 2, "", CURLE_OK },
/* Octet string */
{ CURL_ASN1_OCTET_STRING, "\x00\x00\x00\x04\x05", 5, "00:00:00:04:05:",
CURLE_OK },
{ CURL_ASN1_OCTET_STRING, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
"\xff\xff", 14, "", CURLE_TOO_LARGE},
/* Bit string. The first byte is number of unused bits. */
{ CURL_ASN1_BIT_STRING, "\x00\x55", 2, "55:", CURLE_OK },
/* Invalid number of unused bits (> 7) */
{ CURL_ASN1_BIT_STRING, "\x08\x55", 2, "", CURLE_BAD_FUNCTION_ARGUMENT },
{ CURL_ASN1_BIT_STRING, "\x00\xaa\x55", 3, "aa:55:", CURLE_OK },
{ CURL_ASN1_BIT_STRING, "\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
"\xff\xff", 15, "", CURLE_TOO_LARGE},
/* 3 unused bits, data 0xF0 (11110000)
The '0' at the end of 11110... are the unused bits. */
{ CURL_ASN1_BIT_STRING, "\x03\xf0", 2, "f0:", CURLE_OK },
/* Integer */
{ CURL_ASN1_INTEGER, "\x00", 1, "0", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x01", 1, "1", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x09", 1, "9", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x0a", 1, "10", CURLE_OK },
{ CURL_ASN1_INTEGER, "\xb", 1, "11", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x11", 1, "17", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x7f", 1, "127", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x80", 1, "-128", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x81", 1, "-127", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x82", 1, "-126", CURLE_OK },
{ CURL_ASN1_INTEGER, "\xff", 1, "-1", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x27\x0f", 2, "9999", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x27\x10", 2, "0x2710", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x7f\x81", 2, "0x7f81", CURLE_OK },
/* sign-extended, would be -32385 in decimal */
{ CURL_ASN1_INTEGER, "\x81\x7f", 2, "0xffff817f", CURLE_OK },
{ CURL_ASN1_INTEGER, "\xff\xff", 2, "-1", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x00\x00", 2, "0", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x01\x02\x03", 3, "0x10203", CURLE_OK },
{ CURL_ASN1_INTEGER, "\xff\x02\xff", 3, "0xffff02ff", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x00\xff\x00", 3, "0xff00", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x01\x02\x03\x04", 4, "0x1020304", CURLE_OK },
{ CURL_ASN1_INTEGER, "\xff\x02\x03\x04", 4, "0xff020304", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x00\x00\x00\x04", 4, "4", CURLE_OK },
{ CURL_ASN1_INTEGER, "\x00\x00\x00\x04\x05", 5, "00:00:00:04:05:",
CURLE_OK },
{ CURL_ASN1_INTEGER, "\xff\x00\x00\x04\x05", 5, "ff:00:00:04:05:",
CURLE_OK },
{ CURL_ASN1_INTEGER, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff",
11, "ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:", CURLE_OK },
{ CURL_ASN1_INTEGER, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
"\xff", 12, "ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:", CURLE_OK },
{ CURL_ASN1_INTEGER, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
"\xff\xff", 14, "", CURLE_TOO_LARGE},
{ CURL_ASN1_INTEGER, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
"\xff\xff\xff", 15, "", CURLE_TOO_LARGE },
{ CURL_ASN1_INTEGER, "", 0, "", CURLE_BAD_FUNCTION_ARGUMENT },
/* Leading zero required if the MSB of the next byte is 1 (to keep it
positive) */
{ CURL_ASN1_INTEGER, "\x00\x80", 2, "128", CURLE_OK },
/* Enumerated works the same as Integer */
{ CURL_ASN1_ENUMERATED, "\x00", 1, "0", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\x01", 1, "1", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\x09", 1, "9", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\x0a", 1, "10", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\xb", 1, "11", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\x11", 1, "17", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\x7f", 1, "127", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\x80", 1, "-128", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\xff", 1, "-1", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\x7f\x81", 2, "0x7f81", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\xff\xff", 2, "-1", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\x00\x00", 2, "0", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\x01\x02\x03", 3, "0x10203", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\xff\x02\xff", 3, "0xffff02ff", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\x00\xff\x00", 3, "0xff00", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\x01\x02\x03\x04", 4, "0x1020304", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\xff\x02\x03\x04", 4, "0xff020304", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\x00\x00\x00\x04", 4, "4", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\x00\x00\x00\x04\x05", 5, "00:00:00:04:05:",
CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\xff\x00\x00\x04\x05", 5, "ff:00:00:04:05:",
CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff",
11, "ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
"\xff", 12, "ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:", CURLE_OK },
{ CURL_ASN1_ENUMERATED, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
"\xff\xff", 14, "", CURLE_TOO_LARGE},
{ CURL_ASN1_ENUMERATED, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
"\xff\xff\xff", 15, "", CURLE_TOO_LARGE },
{ CURL_ASN1_ENUMERATED, "", 0, "", CURLE_BAD_FUNCTION_ARGUMENT },
/* Boolean */
{ CURL_ASN1_BOOLEAN, "\xff", 1, "TRUE", CURLE_OK },
{ CURL_ASN1_BOOLEAN, "\x01", 1, "", CURLE_BAD_FUNCTION_ARGUMENT },
{ CURL_ASN1_BOOLEAN, "\x02", 1, "", CURLE_BAD_FUNCTION_ARGUMENT },
{ CURL_ASN1_BOOLEAN, "\x00", 1, "FALSE", CURLE_OK },
{ CURL_ASN1_BOOLEAN, "\x01\x01", 2, "", CURLE_BAD_FUNCTION_ARGUMENT },
{ CURL_ASN1_BOOLEAN, "\x00\x01", 2, "", CURLE_BAD_FUNCTION_ARGUMENT },
{ CURL_ASN1_BOOLEAN, "", 0, "", CURLE_BAD_FUNCTION_ARGUMENT },
};
size_t i;
struct dynbuf dbuf;
bool all_ok = TRUE;
if(curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK) {
curl_mfprintf(stderr, "curl_global_init() failed\n");
return TEST_ERR_MAJOR_BAD;
}
/* the real code uses CURL_X509_STR_MAX for maximum size, but we set a
smaller one here so that we can test running into the limit a little
easier */
curlx_dyn_init(&dbuf, 40);
for(i = 0; i < CURL_ARRAYSIZE(test_specs); ++i) {
if(!test1667(&test_specs[i], i, &dbuf))
all_ok = FALSE;
}
fail_unless(all_ok, "some tests of ASN1tostr() failed");
curlx_dyn_free(&dbuf);
curl_global_cleanup();
UNITTEST_END_SIMPLE
}
#undef OID
#else
static CURLcode test_unit1667(const char *arg)
{
UNITTEST_BEGIN_SIMPLE
puts("not tested since ASN1tostr() is not built in");
UNITTEST_END_SIMPLE
}
#endif
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