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libtomcrypt/tests/ssh_test.c
Steffen Jaeckel ae1c26842b use LTC_NULL in the library code 
`NULL` as defined by the standard is not guaranteed to be of a pointer
type. In order to make sure that in vararg API's a pointer type is used,
define our own version and use that one internally.

Signed-off-by: Steffen Jaeckel <s@jaeckel.eu>
2024-02-18 17:02:08 +00:00

357 lines
12 KiB
C
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */
#include "tomcrypt_test.h"
/**
@file ssh_test.c
Support for SSH data formats (RFC4251), Russ Williams
*/
#ifdef LTC_SSH
#define BUFSIZE 64
/**
Test vectors from from RFC4251, section 5
uint32: "the value 699921578 (0x29b7f4aa) is stored as 29 b7 f4 aa"
string: "the US-ASCII string "testing" is represented as 00 00 00 07 t e s t i n g"
mpint:
value (hex) representation (hex)
----------- --------------------
0 00 00 00 00
9a378f9b2e332a7 00 00 00 08 09 a3 78 f9 b2 e3 32 a7
80 00 00 00 02 00 80
-1234 00 00 00 02 ed cc
-deadbeef 00 00 00 05 ff 21 52 41 11
name-list:
value representation (hex)
----- --------------------
(), the empty name-list 00 00 00 00
("zlib") 00 00 00 04 7a 6c 69 62
("zlib,none") 00 00 00 09 7a 6c 69 62 2c 6e 6f 6e 65
*/
static const unsigned char byte1[] = {0x01};
static const unsigned char byte2[] = {0x71};
static const unsigned char uint32[] = {0x29, 0xb7, 0xf4, 0xaa};
static const unsigned char uint64[] = {0x09, 0xa3, 0x78, 0xf9, 0xb2, 0xe3, 0x32, 0xa7};
static const unsigned char string[] = {0x00, 0x00, 0x00, 0x07, 0x74, 0x65, 0x73, 0x74, 0x69, 0x6e, 0x67};
static const unsigned char mpint1[] = {0x00, 0x00, 0x00, 0x00};
static const unsigned char mpint2[] = {0x00, 0x00, 0x00, 0x08, 0x09, 0xa3, 0x78, 0xf9, 0xb2, 0xe3, 0x32, 0xa7};
static const unsigned char mpint3[] = {0x00, 0x00, 0x00, 0x02, 0x00, 0x80};
static const unsigned char nlist1[] = {0x00, 0x00, 0x00, 0x00};
static const unsigned char nlist2[] = {0x00, 0x00, 0x00, 0x04, 0x7a, 0x6c, 0x69, 0x62};
static const unsigned char nlist3[] = {0x00, 0x00, 0x00, 0x09, 0x7a, 0x6c, 0x69, 0x62, 0x2c, 0x6e, 0x6f, 0x6e, 0x65};
/**
LTC_SSH encoding test
@return CRYPT_OK if successful
*/
static int s_ssh_encoding_test(void)
{
unsigned char buffer[BUFSIZE];
unsigned long buflen;
unsigned long len;
void *v, *zero;
int err;
/* Buffer too short */
buflen = 3;
zeromem(buffer, BUFSIZE);
SHOULD_FAIL(ssh_encode_sequence_multi(buffer, &buflen,
LTC_SSHDATA_UINT32, 0x29b7f4aa,
LTC_SSHDATA_EOL, NULL));
/* byte */
buflen = BUFSIZE;
zeromem(buffer, BUFSIZE);
DO(ssh_encode_sequence_multi(buffer, &buflen,
LTC_SSHDATA_BYTE, 0x01,
LTC_SSHDATA_EOL, NULL));
COMPARE_TESTVECTOR(buffer, buflen, byte1, sizeof(byte1), "enc-byte", 1);
buflen = BUFSIZE;
zeromem(buffer, BUFSIZE);
DO(ssh_encode_sequence_multi(buffer, &buflen,
LTC_SSHDATA_BYTE, 0x71,
LTC_SSHDATA_EOL, NULL));
COMPARE_TESTVECTOR(buffer, buflen, byte2, sizeof(byte2), "enc-byte", 2);
if (XMEMCMP(buffer, byte2, buflen) != 0) return CRYPT_FAIL_TESTVECTOR;
/* boolean */
buflen = BUFSIZE;
zeromem(buffer, BUFSIZE);
DO(ssh_encode_sequence_multi(buffer, &buflen,
LTC_SSHDATA_BOOLEAN, 0x01,
LTC_SSHDATA_EOL, NULL));
COMPARE_TESTVECTOR(buffer, buflen, byte1, sizeof(byte1), "enc-boolean", 1);
buflen = BUFSIZE;
zeromem(buffer, BUFSIZE);
DO(ssh_encode_sequence_multi(buffer, &buflen,
LTC_SSHDATA_BOOLEAN, 0x71,
LTC_SSHDATA_EOL, NULL));
/* Should be written out as 0x01 */
COMPARE_TESTVECTOR(buffer, buflen, byte1, sizeof(byte1), "enc-boolean", 2);
/* uint32 */
buflen = BUFSIZE;
zeromem(buffer, BUFSIZE);
DO(ssh_encode_sequence_multi(buffer, &buflen,
LTC_SSHDATA_UINT32, 0x29b7f4aa,
LTC_SSHDATA_EOL, NULL));
COMPARE_TESTVECTOR(buffer, buflen, uint32, sizeof(uint32), "enc-uint32", 1);
/* uint64 */
buflen = BUFSIZE;
zeromem(buffer, BUFSIZE);
DO(ssh_encode_sequence_multi(buffer, &buflen,
LTC_SSHDATA_UINT64, CONST64(0x09a378f9b2e332a7),
LTC_SSHDATA_EOL, NULL));
COMPARE_TESTVECTOR(buffer, buflen, uint64, sizeof(uint64), "enc-uint64", 1);
/* string */
buflen = BUFSIZE;
zeromem(buffer, BUFSIZE);
len = strlen("testing");
DO(ssh_encode_sequence_multi(buffer, &buflen,
LTC_SSHDATA_STRING, "testing", len,
LTC_SSHDATA_EOL, NULL));
COMPARE_TESTVECTOR(buffer, buflen, string, sizeof(string), "enc-string", 1);
/* mpint */
if ((err = mp_init_multi(&zero, &v, LTC_NULL)) != CRYPT_OK) {
return err;
}
buflen = BUFSIZE;
zeromem(buffer, BUFSIZE);
DO(mp_set(zero, 0));
DO(ssh_encode_sequence_multi(buffer, &buflen,
LTC_SSHDATA_MPINT, zero,
LTC_SSHDATA_EOL, NULL));
COMPARE_TESTVECTOR(buffer, buflen, mpint1, sizeof(mpint1), "enc-mpint", 1);
buflen = BUFSIZE;
zeromem(buffer, BUFSIZE);
DO(mp_read_radix(v, "9a378f9b2e332a7", 16));
DO(ssh_encode_sequence_multi(buffer, &buflen,
LTC_SSHDATA_MPINT, v,
LTC_SSHDATA_EOL, NULL));
COMPARE_TESTVECTOR(buffer, buflen, mpint2, sizeof(mpint2), "enc-mpint", 2);
buflen = BUFSIZE;
zeromem(buffer, BUFSIZE);
DO(mp_set(v, 0x80));
DO(ssh_encode_sequence_multi(buffer, &buflen,
LTC_SSHDATA_MPINT, v,
LTC_SSHDATA_EOL, NULL));
COMPARE_TESTVECTOR(buffer, buflen, mpint3, sizeof(mpint3), "enc-mpint", 3);
mp_clear_multi(v, zero, LTC_NULL);
/* name-list */
buflen = BUFSIZE;
zeromem(buffer, BUFSIZE);
len = strlen("");
DO(ssh_encode_sequence_multi(buffer, &buflen,
LTC_SSHDATA_NAMELIST, "", len,
LTC_SSHDATA_EOL, NULL));
COMPARE_TESTVECTOR(buffer, buflen, nlist1, sizeof(nlist1), "enc-nlist", 1);
buflen = BUFSIZE;
zeromem(buffer, BUFSIZE);
len = strlen("zlib");
DO(ssh_encode_sequence_multi(buffer, &buflen,
LTC_SSHDATA_NAMELIST, "zlib", len,
LTC_SSHDATA_EOL, NULL));
COMPARE_TESTVECTOR(buffer, buflen, nlist2, sizeof(nlist2), "enc-nlist", 2);
buflen = BUFSIZE;
zeromem(buffer, BUFSIZE);
len = strlen("zlib,none");
DO(ssh_encode_sequence_multi(buffer, &buflen,
LTC_SSHDATA_NAMELIST, "zlib,none", len,
LTC_SSHDATA_EOL, NULL));
COMPARE_TESTVECTOR(buffer, buflen, nlist3, sizeof(nlist3), "enc-nlist", 3);
return CRYPT_OK;
}
/**
LTC_SSH decoding test
@return CRYPT_OK if successful
*/
static int s_ssh_decoding_test(void)
{
char strbuf[BUFSIZE];
void *u, *v;
unsigned long size;
ulong32 tmp32;
ulong64 tmp64;
unsigned char tmp8;
unsigned long len;
int err;
/* Buffer longer */
len = sizeof(strbuf);
strbuf[0] = 0;
DO(ssh_decode_sequence_multi((unsigned char*)strbuf, &len,
LTC_SSHDATA_BYTE, &tmp8,
LTC_SSHDATA_EOL, NULL));
ENSURE(tmp8 == 0x00);
ENSURE(len == 1);
/* byte */
len = sizeof(byte1);
DO(ssh_decode_sequence_multi(byte1, &len,
LTC_SSHDATA_BYTE, &tmp8,
LTC_SSHDATA_EOL, NULL));
ENSURE(tmp8 == 0x01);
ENSURE(len == 1);
len = sizeof(byte2);
DO(ssh_decode_sequence_multi(byte2, &len,
LTC_SSHDATA_BYTE, &tmp8,
LTC_SSHDATA_EOL, NULL));
ENSURE(tmp8 == 0x71);
ENSURE(len == 1);
/* boolean */
len = sizeof(byte1);
DO(ssh_decode_sequence_multi(byte1, &len,
LTC_SSHDATA_BOOLEAN, &tmp8,
LTC_SSHDATA_EOL, NULL));
ENSURE(tmp8 == 0x01);
ENSURE(len == 1);
len = sizeof(byte2);
DO(ssh_decode_sequence_multi(byte2, &len,
LTC_SSHDATA_BOOLEAN, &tmp8,
LTC_SSHDATA_EOL, NULL));
ENSURE(tmp8 == 0x01);
ENSURE(len == 1);
/* uint32 */
len = sizeof(uint32);
DO(ssh_decode_sequence_multi(uint32, &len,
LTC_SSHDATA_UINT32, &tmp32,
LTC_SSHDATA_EOL, NULL));
ENSURE(tmp32 == 0x29b7f4aa);
ENSURE(len == 4);
/* uint64 */
len = sizeof(uint64);
DO(ssh_decode_sequence_multi(uint64, &len,
LTC_SSHDATA_UINT64, &tmp64,
LTC_SSHDATA_EOL, NULL));
if (tmp64 != CONST64(0x09a378f9b2e332a7)) return CRYPT_FAIL_TESTVECTOR;
ENSURE(len == 8);
/* string */
zeromem(strbuf, BUFSIZE);
size = BUFSIZE;
len = sizeof(string);
DO(ssh_decode_sequence_multi(string, &len,
LTC_SSHDATA_STRING, strbuf, &size,
LTC_SSHDATA_EOL, NULL));
ENSURE(strlen("testing") == size);
ENSURE(XSTRCMP(strbuf, "testing") == 0);
ENSURE(strlen("testing") + 4 == len);
/* mpint */
if ((err = mp_init_multi(&u, &v, LTC_NULL)) != CRYPT_OK) {
return err;
}
len = sizeof(mpint1);
DO(ssh_decode_sequence_multi(mpint1, &len,
LTC_SSHDATA_MPINT, v,
LTC_SSHDATA_EOL, NULL));
ENSURE(mp_cmp_d(v, 0) == LTC_MP_EQ);
ENSURE(sizeof(mpint1) == len);
len = sizeof(mpint2);
DO(ssh_decode_sequence_multi(mpint2, &len,
LTC_SSHDATA_MPINT, v,
LTC_SSHDATA_EOL, NULL));
DO(mp_read_radix(u, "9a378f9b2e332a7", 16));
ENSURE(mp_cmp(u, v) == LTC_MP_EQ);
ENSURE(sizeof(mpint2) == len);
len = sizeof(mpint3);
DO(ssh_decode_sequence_multi(mpint3, &len,
LTC_SSHDATA_MPINT, v,
LTC_SSHDATA_EOL, NULL));
ENSURE(mp_cmp_d(v, 0x80) == LTC_MP_EQ);
ENSURE(sizeof(mpint3) == len);
mp_clear_multi(v, u, LTC_NULL);
/* name-list */
zeromem(strbuf, BUFSIZE);
size = BUFSIZE;
len = sizeof(nlist1);
DO(ssh_decode_sequence_multi(nlist1, &len,
LTC_SSHDATA_NAMELIST, strbuf, &size,
LTC_SSHDATA_EOL, NULL));
ENSURE(strlen("") == size);
ENSURE(XSTRCMP(strbuf, "") == 0);
zeromem(strbuf, BUFSIZE);
size = BUFSIZE;
len = sizeof(nlist2);
DO(ssh_decode_sequence_multi(nlist2, &len,
LTC_SSHDATA_NAMELIST, strbuf, &size,
LTC_SSHDATA_EOL, NULL));
ENSURE(strlen("zlib") == size);
ENSURE(XSTRCMP(strbuf, "zlib") == 0);
ENSURE(strlen("zlib") + 4 == len);
zeromem(strbuf, BUFSIZE);
size = BUFSIZE;
len = sizeof(nlist3);
DO(ssh_decode_sequence_multi(nlist3, &len,
LTC_SSHDATA_NAMELIST, strbuf, &size,
LTC_SSHDATA_EOL, NULL));
ENSURE(strlen("zlib,none") == size);
ENSURE(XSTRCMP(strbuf, "zlib,none") == 0);
ENSURE(strlen("zlib,none") + 4 == len);
return CRYPT_OK;
}
/**
LTC_SSH self-test
@return CRYPT_OK if successful, CRYPT_NOP if tests have been disabled.
*/
int ssh_test(void)
{
if (ltc_mp.name == NULL) return CRYPT_NOP;
DO(s_ssh_encoding_test());
DO(s_ssh_decoding_test());
return CRYPT_OK;
}
#else
int ssh_test(void)
{
return CRYPT_NOP;
}
#endif
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