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samba-mirror/source4/auth/tests/heimdal_unwrap_des.c
Joseph Sutton c8e85295c9 CVE-2022-3437 s4/auth/tests: Add unit tests for unwrap_des3() 
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15134

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2022-10-25 10:31:33 +00:00

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/*
* Unit tests for third_party/heimdal/lib/gssapi/krb5/unwrap.c
*
* Copyright (C) Catalyst.NET Ltd 2022
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
/*
* from cmocka.c:
* These headers or their equivalents should be included prior to
* including
* this header file.
*
* #include <stdarg.h>
* #include <stddef.h>
* #include <setjmp.h>
*
* This allows test applications to use custom definitions of C standard
* library functions and types.
*
*/
#include <stdarg.h>
#include <stddef.h>
#include <setjmp.h>
#include <cmocka.h>
#include "includes.h"
#include "replace.h"
#include "../../../third_party/heimdal/lib/gssapi/gssapi/gssapi.h"
#include "gsskrb5_locl.h"
/******************************************************************************
* Helper functions
******************************************************************************/
const uint8_t *valid_range_begin;
const uint8_t *valid_range_end;
const uint8_t *invalid_range_end;
/*
* 'array_len' is the size of the passed in array. 'buffer_len' is the size to
* report in the resulting buffer.
*/
static const gss_buffer_desc get_input_buffer(TALLOC_CTX *mem_ctx,
const uint8_t array[],
const size_t array_len,
const size_t buffer_len)
{
gss_buffer_desc buf;
/* Add some padding to catch invalid memory accesses. */
const size_t padding = 0x100;
const size_t padded_len = array_len + padding;
uint8_t *data = talloc_size(mem_ctx, padded_len);
assert_non_null(data);
memcpy(data, array, array_len);
memset(data + array_len, 0, padding);
assert_in_range(buffer_len, 0, array_len);
buf.value = data;
buf.length = buffer_len;
valid_range_begin = buf.value;
valid_range_end = valid_range_begin + buf.length;
invalid_range_end = valid_range_begin + padded_len;
return buf;
}
static void assert_mem_in_valid_range(const uint8_t *ptr, const size_t len)
{
/* Ensure we've set up the range pointers properly. */
assert_non_null(valid_range_begin);
assert_non_null(valid_range_end);
assert_non_null(invalid_range_end);
/*
* Ensure the length isn't excessively large (a symptom of integer
* underflow).
*/
assert_in_range(len, 0, 0x1000);
/* Ensure the memory is in our valid range. */
assert_in_range(ptr, valid_range_begin, valid_range_end);
assert_in_range(ptr + len, valid_range_begin, valid_range_end);
}
/*
* This function takes a pointer to volatile to allow it to be called from the
* ct_memcmp() wrapper.
*/
static void assert_mem_outside_invalid_range(const volatile uint8_t *ptr,
const size_t len)
{
const LargestIntegralType _valid_range_end
= cast_ptr_to_largest_integral_type(valid_range_end);
const LargestIntegralType _invalid_range_end
= cast_ptr_to_largest_integral_type(invalid_range_end);
const LargestIntegralType _ptr = cast_ptr_to_largest_integral_type(ptr);
const LargestIntegralType _len = cast_to_largest_integral_type(len);
/* Ensure we've set up the range pointers properly. */
assert_non_null(valid_range_begin);
assert_non_null(valid_range_end);
assert_non_null(invalid_range_end);
/*
* Ensure the length isn't excessively large (a symptom of integer
* underflow).
*/
assert_in_range(len, 0, 0x1000);
/* Ensure the memory is outside the invalid range. */
if (_ptr < _invalid_range_end && _ptr + _len > _valid_range_end) {
fail();
}
}
/*****************************************************************************
* wrapped functions
*****************************************************************************/
krb5_keyblock dummy_key;
krb5_error_code __wrap_krb5_auth_con_getlocalsubkey(krb5_context context,
krb5_auth_context auth_context,
krb5_keyblock **keyblock);
krb5_error_code __wrap_krb5_auth_con_getlocalsubkey(krb5_context context,
krb5_auth_context auth_context,
krb5_keyblock **keyblock)
{
*keyblock = &dummy_key;
return 0;
}
void __wrap_krb5_free_keyblock(krb5_context context,
krb5_keyblock *keyblock);
void __wrap_krb5_free_keyblock(krb5_context context,
krb5_keyblock *keyblock)
{
assert_ptr_equal(&dummy_key, keyblock);
}
struct krb5_crypto_data dummy_crypto;
krb5_error_code __wrap_krb5_crypto_init(krb5_context context,
const krb5_keyblock *key,
krb5_enctype etype,
krb5_crypto *crypto);
krb5_error_code __wrap_krb5_crypto_init(krb5_context context,
const krb5_keyblock *key,
krb5_enctype etype,
krb5_crypto *crypto)
{
static const LargestIntegralType etypes[] = {ETYPE_DES3_CBC_NONE, 0};
assert_ptr_equal(&dummy_key, key);
assert_in_set(etype, etypes, ARRAY_SIZE(etypes));
*crypto = &dummy_crypto;
return 0;
}
krb5_error_code __wrap_krb5_decrypt(krb5_context context,
krb5_crypto crypto,
unsigned usage,
void *data,
size_t len,
krb5_data *result);
krb5_error_code __wrap_krb5_decrypt(krb5_context context,
krb5_crypto crypto,
unsigned usage,
void *data,
size_t len,
krb5_data *result)
{
assert_ptr_equal(&dummy_crypto, crypto);
assert_int_equal(KRB5_KU_USAGE_SEAL, usage);
assert_mem_in_valid_range(data, len);
check_expected(len);
check_expected_ptr(data);
result->data = malloc(len);
assert_non_null(result->data);
result->length = len;
memcpy(result->data, data, len);
return 0;
}
krb5_error_code __wrap_krb5_decrypt_ivec(krb5_context context,
krb5_crypto crypto,
unsigned usage,
void *data,
size_t len,
krb5_data *result,
void *ivec);
krb5_error_code __wrap_krb5_decrypt_ivec(krb5_context context,
krb5_crypto crypto,
unsigned usage,
void *data,
size_t len,
krb5_data *result,
void *ivec)
{
assert_ptr_equal(&dummy_crypto, crypto);
assert_int_equal(KRB5_KU_USAGE_SEQ, usage);
assert_mem_in_valid_range(data, len);
assert_int_equal(8, len);
check_expected_ptr(data);
check_expected_ptr(ivec);
result->data = malloc(len);
assert_non_null(result->data);
result->length = len;
memcpy(result->data, data, len);
return 0;
}
krb5_error_code __wrap_krb5_verify_checksum(krb5_context context,
krb5_crypto crypto,
krb5_key_usage usage,
void *data,
size_t len,
Checksum *cksum);
krb5_error_code __wrap_krb5_verify_checksum(krb5_context context,
krb5_crypto crypto,
krb5_key_usage usage,
void *data,
size_t len,
Checksum *cksum)
{
assert_ptr_equal(&dummy_crypto, crypto);
assert_int_equal(KRB5_KU_USAGE_SIGN, usage);
assert_mem_in_valid_range(data, len);
check_expected(len);
check_expected_ptr(data);
assert_non_null(cksum);
assert_int_equal(CKSUMTYPE_HMAC_SHA1_DES3, cksum->cksumtype);
assert_int_equal(20, cksum->checksum.length);
check_expected_ptr(cksum->checksum.data);
return 0;
}
krb5_error_code __wrap_krb5_crypto_destroy(krb5_context context,
krb5_crypto crypto);
krb5_error_code __wrap_krb5_crypto_destroy(krb5_context context,
krb5_crypto crypto)
{
assert_ptr_equal(&dummy_crypto, crypto);
return 0;
}
int __wrap_der_get_length(const unsigned char *p,
size_t len,
size_t *val,
size_t *size);
int __real_der_get_length(const unsigned char *p,
size_t len,
size_t *val,
size_t *size);
int __wrap_der_get_length(const unsigned char *p,
size_t len,
size_t *val,
size_t *size)
{
assert_mem_in_valid_range(p, len);
return __real_der_get_length(p, len, val, size);
}
int __wrap_ct_memcmp(const volatile void * volatile p1,
const volatile void * volatile p2,
size_t len);
int __real_ct_memcmp(const volatile void * volatile p1,
const volatile void * volatile p2,
size_t len);
int __wrap_ct_memcmp(const volatile void * volatile p1,
const volatile void * volatile p2,
size_t len)
{
assert_mem_outside_invalid_range(p1, len);
assert_mem_outside_invalid_range(p2, len);
return __real_ct_memcmp(p1, p2, len);
}
void *__wrap_malloc(size_t size);
void *__real_malloc(size_t size);
void *__wrap_malloc(size_t size)
{
/*
* Ensure the length isn't excessively large (a symptom of integer
* underflow).
*/
assert_in_range(size, 0, 0x10000);
return __real_malloc(size);
}
/*****************************************************************************
* Mock implementations
*****************************************************************************/
/*
* Set the globals used by the mocked functions to a known and consistent state
*
*/
static void init_mock_results(TALLOC_CTX *mem_ctx)
{
dummy_key.keytype = KRB5_ENCTYPE_DES3_CBC_MD5;
dummy_key.keyvalue.data = NULL;
dummy_key.keyvalue.length = 0;
dummy_crypto = (struct krb5_crypto_data) {0};
valid_range_begin = NULL;
valid_range_end = NULL;
invalid_range_end = NULL;
}
/*****************************************************************************
* Unit test set up and tear down
*****************************************************************************/
struct context {
gss_ctx_id_t context_handle;
};
static int setup(void **state) {
struct context *ctx = NULL;
krb5_context context = NULL;
OM_uint32 major_status;
OM_uint32 minor_status;
krb5_error_code code;
ctx = talloc_zero(NULL, struct context);
assert_non_null(ctx);
init_mock_results(ctx);
code = _gsskrb5_init(&context);
assert_int_equal(0, code);
major_status = _gsskrb5_create_ctx(&minor_status,
&ctx->context_handle,
context,
GSS_C_NO_CHANNEL_BINDINGS,
ACCEPTOR_START);
assert_int_equal(GSS_S_COMPLETE, major_status);
*state = ctx;
return 0;
}
static int teardown(void **state) {
struct context *ctx = *state;
OM_uint32 major_status;
OM_uint32 minor_status;
major_status = _gsskrb5_delete_sec_context(&minor_status,
&ctx->context_handle,
GSS_C_NO_BUFFER);
assert_int_equal(GSS_S_COMPLETE, major_status);
TALLOC_FREE(ctx);
return 0;
}
/*****************************************************************************
* _gsskrb5_unwrap unit tests
*****************************************************************************/
static void test_unwrap_dce_style_missing_payload(void **state) {
struct context *ctx = *state;
OM_uint32 major_status;
OM_uint32 minor_status;
gsskrb5_ctx gss_ctx;
gss_buffer_desc input = {0};
gss_buffer_desc output = {0};
int conf_state;
gss_qop_t qop_state;
/* See RFC 1964 for token format. */
static const uint8_t data[] = {
0x60, /* ASN.1 Application tag */
0x37, /* total length */
0x06, /* OBJECT IDENTIFIER */
0x09, /* mech length */
0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x01, 0x02, 0x02, /* GSS KRB5 mech */
0x02, 0x01, /* TOK_ID */
0x04, 0x00, /* SGN_ALG (HMAC SHA1 DES3-KD) */
0xff, 0xff, /* SEAL_ALG (none) */
0xff, 0xff, /* Filler */
0xa0, 0xa1, 0xa2, 0xa3, /* encrypted sequence number */
0x00, 0x00, 0x00, 0x00, /* sequence number direction (remote) */
/* checksum */
0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
0xa9, 0xaa, 0xab, 0xac, 0xad,
0xae, 0xaf, 0xb0, 0xb1, 0xb2,
0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
};
input = get_input_buffer(ctx, data, sizeof(data), 22);
gss_ctx = (gsskrb5_ctx) ctx->context_handle;
gss_ctx->flags |= GSS_C_DCE_STYLE;
major_status = _gsskrb5_unwrap(&minor_status,
ctx->context_handle,
&input,
&output,
&conf_state,
&qop_state);
assert_int_equal(GSS_S_BAD_MECH, major_status);
}
static void test_unwrap_dce_style_valid(void **state) {
struct context *ctx = *state;
OM_uint32 major_status;
OM_uint32 minor_status;
gsskrb5_ctx gss_ctx;
gss_buffer_desc input = {0};
gss_buffer_desc output = {0};
int conf_state;
gss_qop_t qop_state;
/* See RFC 1964 for token format. */
static const uint8_t data[] = {
0x60, /* ASN.1 Application tag */
0x37, /* total length */
0x06, /* OBJECT IDENTIFIER */
0x09, /* mech length */
0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x01, 0x02, 0x02, /* GSS KRB5 mech */
0x02, 0x01, /* TOK_ID */
0x04, 0x00, /* SGN_ALG (HMAC SHA1 DES3-KD) */
0xff, 0xff, /* SEAL_ALG (none) */
0xff, 0xff, /* Filler */
0xa0, 0xa1, 0xa2, 0xa3, /* encrypted sequence number */
0x00, 0x00, 0x00, 0x00, /* sequence number direction (remote) */
/* checksum */
0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
0xa9, 0xaa, 0xab, 0xac, 0xad,
0xae, 0xaf, 0xb0, 0xb1, 0xb2,
0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
/* unused */
0xb8, 0xb9, 0xba, 0xbb,
0xbc, 0xbd, 0xbe,
0x00, /* padding byte */
};
input = get_input_buffer(ctx, data, sizeof(data), 57);
gss_ctx = (gsskrb5_ctx) ctx->context_handle;
gss_ctx->flags |= GSS_C_DCE_STYLE;
expect_value(__wrap_krb5_decrypt_ivec, data, (uint8_t *)input.value + 21);
expect_memory(__wrap_krb5_decrypt_ivec, ivec,
(uint8_t *)input.value + 29, DES_CBLOCK_LEN);
expect_value(__wrap_krb5_verify_checksum, len, 16);
expect_value(__wrap_krb5_verify_checksum, data, (uint8_t *)input.value + 41);
expect_memory(__wrap_krb5_verify_checksum, cksum->checksum.data,
(uint8_t *)input.value + 29, 20);
major_status = _gsskrb5_unwrap(&minor_status,
ctx->context_handle,
&input,
&output,
&conf_state,
&qop_state);
assert_int_equal(GSS_S_COMPLETE, major_status);
assert_int_equal(0, conf_state);
assert_int_equal(GSS_C_QOP_DEFAULT, qop_state);
assert_int_equal(output.length, 0);
major_status = gss_release_buffer(&minor_status, &output);
assert_int_equal(GSS_S_COMPLETE, major_status);
}
static void test_unwrap_dce_style_with_seal_missing_payload(void **state) {
struct context *ctx = *state;
OM_uint32 major_status;
OM_uint32 minor_status;
gsskrb5_ctx gss_ctx;
gss_buffer_desc input = {0};
gss_buffer_desc output = {0};
int conf_state;
gss_qop_t qop_state;
/* See RFC 1964 for token format. */
static const uint8_t data[] = {
0x60, /* ASN.1 Application tag */
0x37, /* total length */
0x06, /* OBJECT IDENTIFIER */
0x09, /* mech length */
0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x01, 0x02, 0x02, /* GSS KRB5 mech */
0x02, 0x01, /* TOK_ID */
0x04, 0x00, /* SGN_ALG (HMAC SHA1 DES3-KD) */
0x02, 0x00, /* SEAL_ALG (DES3-KD) */
0xff, 0xff, /* Filler */
0xa0, 0xa1, 0xa2, 0xa3, /* encrypted sequence number */
0x00, 0x00, 0x00, 0x00, /* sequence number direction (remote) */
/* checksum */
0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
0xa9, 0xaa, 0xab, 0xac, 0xad,
0xae, 0xaf, 0xb0, 0xb1, 0xb2,
0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
};
input = get_input_buffer(ctx, data, sizeof(data), 22);
gss_ctx = (gsskrb5_ctx) ctx->context_handle;
gss_ctx->flags |= GSS_C_DCE_STYLE;
major_status = _gsskrb5_unwrap(&minor_status,
ctx->context_handle,
&input,
&output,
&conf_state,
&qop_state);
assert_int_equal(GSS_S_BAD_MECH, major_status);
}
static void test_unwrap_dce_style_with_seal_valid(void **state) {
struct context *ctx = *state;
OM_uint32 major_status;
OM_uint32 minor_status;
gsskrb5_ctx gss_ctx;
gss_buffer_desc input = {0};
gss_buffer_desc output = {0};
int conf_state;
gss_qop_t qop_state;
/* See RFC 1964 for token format. */
static const uint8_t data[] = {
0x60, /* ASN.1 Application tag */
0x37, /* total length */
0x06, /* OBJECT IDENTIFIER */
0x09, /* mech length */
0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x01, 0x02, 0x02, /* GSS KRB5 mech */
0x02, 0x01, /* TOK_ID */
0x04, 0x00, /* SGN_ALG (HMAC SHA1 DES3-KD) */
0x02, 0x00, /* SEAL_ALG (DES3-KD) */
0xff, 0xff, /* Filler */
0xa0, 0xa1, 0xa2, 0xa3, /* encrypted sequence number */
0x00, 0x00, 0x00, 0x00, /* sequence number direction (remote) */
/* checksum */
0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
0xa9, 0xaa, 0xab, 0xac, 0xad,
0xae, 0xaf, 0xb0, 0xb1, 0xb2,
0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
/* unused */
0xb8, 0xb9, 0xba, 0xbb,
0xbc, 0xbd, 0xbe,
0x00, /* padding byte */
};
input = get_input_buffer(ctx, data, sizeof(data), 57);
gss_ctx = (gsskrb5_ctx) ctx->context_handle;
gss_ctx->flags |= GSS_C_DCE_STYLE;
expect_value(__wrap_krb5_decrypt, len, 8);
expect_value(__wrap_krb5_decrypt, data, (uint8_t *)input.value + 49);
expect_value(__wrap_krb5_decrypt_ivec, data, (uint8_t *)input.value + 21);
expect_memory(__wrap_krb5_decrypt_ivec, ivec,
(uint8_t *)input.value + 29, DES_CBLOCK_LEN);
expect_value(__wrap_krb5_verify_checksum, len, 16);
expect_value(__wrap_krb5_verify_checksum, data, (uint8_t *)input.value + 41);
expect_memory(__wrap_krb5_verify_checksum, cksum->checksum.data,
(uint8_t *)input.value + 29, 20);
major_status = _gsskrb5_unwrap(&minor_status,
ctx->context_handle,
&input,
&output,
&conf_state,
&qop_state);
assert_int_equal(GSS_S_COMPLETE, major_status);
assert_int_equal(1, conf_state);
assert_int_equal(GSS_C_QOP_DEFAULT, qop_state);
assert_int_equal(output.length, 0);
major_status = gss_release_buffer(&minor_status, &output);
assert_int_equal(GSS_S_COMPLETE, major_status);
}
static void test_unwrap_missing_8_bytes(void **state) {
struct context *ctx = *state;
OM_uint32 major_status;
OM_uint32 minor_status;
gss_buffer_desc input = {0};
gss_buffer_desc output = {0};
int conf_state;
gss_qop_t qop_state;
/* See RFC 1964 for token format. */
static const uint8_t data[] = {
0x60, /* ASN.1 Application tag */
0x2f, /* total length */
0x06, /* OBJECT IDENTIFIER */
0x09, /* mech length */
0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x01, 0x02, 0x02, /* GSS KRB5 mech */
0x02, 0x01, /* TOK_ID */
0x04, 0x00, /* SGN_ALG (HMAC SHA1 DES3-KD) */
0xff, 0xff, /* SEAL_ALG (none) */
0xff, 0xff, /* Filler */
0xa0, 0xa1, 0xa2, 0xa3, /* encrypted sequence number */
0x00, 0x00, 0x00, 0x00, /* sequence number direction (remote) */
/* checksum */
0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
0xa9, 0xaa, 0xab, 0xac, 0xad,
0xae, 0xaf, 0xb0, 0xb1, 0xb2,
0xb3, 0xb4, 0xb5, 0xb6, 0x00, /* padding byte */
};
input = get_input_buffer(ctx, data, sizeof(data), 49);
/*
* A fixed unwrap_des3() should fail before these wrappers are called,
* but we want the wrappers to have access to any required values in the
* event that they are called. Specifying WILL_RETURN_ONCE avoids a test
* failure if these values remain unused.
*/
expect_value_count(__wrap_krb5_decrypt_ivec, data,
(uint8_t *)input.value + 21,
WILL_RETURN_ONCE);
expect_memory_count(__wrap_krb5_decrypt_ivec, ivec,
(uint8_t *)input.value + 29, DES_CBLOCK_LEN,
WILL_RETURN_ONCE);
expect_value_count(__wrap_krb5_verify_checksum, len, 8, WILL_RETURN_ONCE);
expect_value_count(__wrap_krb5_verify_checksum, data,
(uint8_t *)input.value + 41,
WILL_RETURN_ONCE);
expect_memory_count(__wrap_krb5_verify_checksum, cksum->checksum.data,
(uint8_t *)input.value + 29, 20,
WILL_RETURN_ONCE);
major_status = _gsskrb5_unwrap(&minor_status,
ctx->context_handle,
&input,
&output,
&conf_state,
&qop_state);
assert_int_equal(GSS_S_BAD_MECH, major_status);
}
static void test_unwrap_missing_payload(void **state) {
struct context *ctx = *state;
OM_uint32 major_status;
OM_uint32 minor_status;
gss_buffer_desc input = {0};
gss_buffer_desc output = {0};
int conf_state;
gss_qop_t qop_state;
/* See RFC 1964 for token format. */
static const uint8_t data[] = {
0x60, /* ASN.1 Application tag */
0x14, /* total length */
0x06, /* OBJECT IDENTIFIER */
0x09, /* mech length */
0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x01, 0x02, 0x02, /* GSS KRB5 mech */
0x02, 0x01, /* TOK_ID */
0x04, 0x00, /* SGN_ALG (HMAC SHA1 DES3-KD) */
0xff, 0xff, /* SEAL_ALG (none) */
0xff, 0xff, /* Filler */
0x00, 0xa1, 0xa2, 0xa3, /* padding byte / encrypted sequence number */
0x00, 0x00, 0x00, 0x00, /* sequence number direction (remote) */
/* checksum */
0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
0xa9, 0xaa, 0xab, 0xac, 0xad,
0xae, 0xaf, 0xb0, 0xb1, 0xb2,
0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
};
input = get_input_buffer(ctx, data, sizeof(data), 22);
major_status = _gsskrb5_unwrap(&minor_status,
ctx->context_handle,
&input,
&output,
&conf_state,
&qop_state);
assert_int_equal(GSS_S_BAD_MECH, major_status);
}
static void test_unwrap_truncated_header_0(void **state) {
struct context *ctx = *state;
OM_uint32 major_status;
OM_uint32 minor_status;
gss_buffer_desc input = {0};
gss_buffer_desc output = {0};
int conf_state;
gss_qop_t qop_state;
/* See RFC 1964 for token format. */
static const uint8_t data[] = {
0x60, /* ASN.1 Application tag */
0x00, /* total length */
0x06, /* OBJECT IDENTIFIER */
};
input = get_input_buffer(ctx, data, sizeof(data), 2);
major_status = _gsskrb5_unwrap(&minor_status,
ctx->context_handle,
&input,
&output,
&conf_state,
&qop_state);
assert_int_equal(GSS_S_DEFECTIVE_TOKEN, major_status);
}
static void test_unwrap_truncated_header_1(void **state) {
struct context *ctx = *state;
OM_uint32 major_status;
OM_uint32 minor_status;
gss_buffer_desc input = {0};
gss_buffer_desc output = {0};
int conf_state;
gss_qop_t qop_state;
/* See RFC 1964 for token format. */
static const uint8_t data[] = {
0x60, /* ASN.1 Application tag */
0x02, /* total length */
0x06, /* OBJECT IDENTIFIER */
0x09, /* mech length */
0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, /* GSS KRB5 mech */
};
input = get_input_buffer(ctx, data, sizeof(data), 4);
major_status = _gsskrb5_unwrap(&minor_status,
ctx->context_handle,
&input,
&output,
&conf_state,
&qop_state);
assert_int_equal(GSS_S_BAD_MECH, major_status);
}
static void test_unwrap_valid(void **state) {
struct context *ctx = *state;
OM_uint32 major_status;
OM_uint32 minor_status;
gss_buffer_desc input = {0};
gss_buffer_desc output = {0};
int conf_state;
gss_qop_t qop_state;
/* See RFC 1964 for token format. */
static const uint8_t data[] = {
0x60, /* ASN.1 Application tag */
0x37, /* total length */
0x06, /* OBJECT IDENTIFIER */
0x09, /* mech length */
0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x01, 0x02, 0x02, /* GSS KRB5 mech */
0x02, 0x01, /* TOK_ID */
0x04, 0x00, /* SGN_ALG (HMAC SHA1 DES3-KD) */
0xff, 0xff, /* SEAL_ALG (none) */
0xff, 0xff, /* Filler */
0xa0, 0xa1, 0xa2, 0xa3, /* encrypted sequence number */
0x00, 0x00, 0x00, 0x00, /* sequence number direction (remote) */
/* checksum */
0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
0xa9, 0xaa, 0xab, 0xac, 0xad,
0xae, 0xaf, 0xb0, 0xb1, 0xb2,
0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
/* unused */
0xb8, 0xb9, 0xba, 0xbb,
0xbc, 0xbd, 0xbe,
0x00, /* padding byte */
};
input = get_input_buffer(ctx, data, sizeof(data), 57);
expect_value(__wrap_krb5_decrypt_ivec, data, (uint8_t *)input.value + 21);
expect_memory(__wrap_krb5_decrypt_ivec, ivec,
(uint8_t *)input.value + 29, DES_CBLOCK_LEN);
expect_value(__wrap_krb5_verify_checksum, len, 16);
expect_value(__wrap_krb5_verify_checksum, data, (uint8_t *)input.value + 41);
expect_memory(__wrap_krb5_verify_checksum, cksum->checksum.data,
(uint8_t *)input.value + 29, 20);
major_status = _gsskrb5_unwrap(&minor_status,
ctx->context_handle,
&input,
&output,
&conf_state,
&qop_state);
assert_int_equal(GSS_S_COMPLETE, major_status);
assert_int_equal(0, conf_state);
assert_int_equal(GSS_C_QOP_DEFAULT, qop_state);
assert_int_equal(output.length, 0);
major_status = gss_release_buffer(&minor_status, &output);
assert_int_equal(GSS_S_COMPLETE, major_status);
}
static void test_unwrap_with_padding_truncated_0(void **state) {
struct context *ctx = *state;
OM_uint32 major_status;
OM_uint32 minor_status;
gss_buffer_desc input = {0};
gss_buffer_desc output = {0};
int conf_state;
gss_qop_t qop_state;
/* See RFC 1964 for token format. */
static const uint8_t data[] = {
0x60, /* ASN.1 Application tag */
0x37, /* total length */
0x06, /* OBJECT IDENTIFIER */
0x09, /* mech length */
0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x01, 0x02, 0x02, /* GSS KRB5 mech */
0x02, 0x01, /* TOK_ID */
0x04, 0x00, /* SGN_ALG (HMAC SHA1 DES3-KD) */
0xff, 0xff, /* SEAL_ALG (none) */
0xff, 0xff, /* Filler */
0xa0, 0xa1, 0xa2, 0xa3, /* encrypted sequence number */
0x00, 0x00, 0x00, 0x00, /* sequence number direction (remote) */
/* checksum */
0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
0xa9, 0xaa, 0xab, 0xac, 0xad,
0xae, 0xaf, 0xb0, 0xb1, 0xb2,
0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
/* unused */
0xb8, 0xb9, 0xba, 0xbb,
0x04, 0x04, 0x04, 0x04, /* padding bytes */
};
input = get_input_buffer(ctx, data, sizeof(data), 57);
/*
* A fixed unwrap_des3() should fail before these wrappers are called,
* but we want the wrappers to have access to any required values in the
* event that they are called. Specifying WILL_RETURN_ONCE avoids a test
* failure if these values remain unused.
*/
expect_value_count(__wrap_krb5_decrypt_ivec, data,
(uint8_t *)input.value + 21,
WILL_RETURN_ONCE);
expect_memory_count(__wrap_krb5_decrypt_ivec, ivec,
(uint8_t *)input.value + 29, DES_CBLOCK_LEN,
WILL_RETURN_ONCE);
expect_value_count(__wrap_krb5_verify_checksum, len, 16, WILL_RETURN_ONCE);
expect_value_count(__wrap_krb5_verify_checksum, data,
(uint8_t *)input.value + 41,
WILL_RETURN_ONCE);
expect_memory_count(__wrap_krb5_verify_checksum, cksum->checksum.data,
(uint8_t *)input.value + 29, 20,
WILL_RETURN_ONCE);
major_status = _gsskrb5_unwrap(&minor_status,
ctx->context_handle,
&input,
&output,
&conf_state,
&qop_state);
assert_int_equal(GSS_S_BAD_MECH, major_status);
}
static void test_unwrap_with_padding_truncated_1(void **state) {
struct context *ctx = *state;
OM_uint32 major_status;
OM_uint32 minor_status;
gss_buffer_desc input = {0};
gss_buffer_desc output = {0};
int conf_state;
gss_qop_t qop_state;
/* See RFC 1964 for token format. */
static const uint8_t data[] = {
0x60, /* ASN.1 Application tag */
0x37, /* total length */
0x06, /* OBJECT IDENTIFIER */
0x09, /* mech length */
0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x01, 0x02, 0x02, /* GSS KRB5 mech */
0x02, 0x01, /* TOK_ID */
0x04, 0x00, /* SGN_ALG (HMAC SHA1 DES3-KD) */
0xff, 0xff, /* SEAL_ALG (none) */
0xff, 0xff, /* Filler */
0x00, 0xa1, 0xa2, 0xa3, /* padding byte / encrypted sequence number */
0x00, 0x00, 0x00, 0x00, /* sequence number direction (remote) */
/* checksum */
0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
0xa9, 0xaa, 0xab, 0xac, 0xad,
0xae, 0xaf, 0xb0, 0xb1, 0xb2,
0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
/* padding bytes */
0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
};
input = get_input_buffer(ctx, data, sizeof(data), 57);
/*
* A fixed unwrap_des3() should fail before these wrappers are called,
* but we want the wrappers to have access to any required values in the
* event that they are called. Specifying WILL_RETURN_ONCE avoids a test
* failure if these values remain unused.
*/
expect_value_count(__wrap_krb5_decrypt_ivec, data,
(uint8_t *)input.value + 21,
WILL_RETURN_ONCE);
expect_memory_count(__wrap_krb5_decrypt_ivec, ivec,
(uint8_t *)input.value + 29, DES_CBLOCK_LEN,
WILL_RETURN_ONCE);
expect_value_count(__wrap_krb5_verify_checksum, len, 16, WILL_RETURN_ONCE);
expect_value_count(__wrap_krb5_verify_checksum, data,
(uint8_t *)input.value + 41,
WILL_RETURN_ONCE);
expect_memory_count(__wrap_krb5_verify_checksum, cksum->checksum.data,
(uint8_t *)input.value + 29, 20,
WILL_RETURN_ONCE);
major_status = _gsskrb5_unwrap(&minor_status,
ctx->context_handle,
&input,
&output,
&conf_state,
&qop_state);
assert_int_equal(GSS_S_BAD_MECH, major_status);
}
static void test_unwrap_with_padding_valid(void **state) {
struct context *ctx = *state;
OM_uint32 major_status;
OM_uint32 minor_status;
gss_buffer_desc input = {0};
gss_buffer_desc output = {0};
int conf_state;
gss_qop_t qop_state;
/* See RFC 1964 for token format. */
static const uint8_t data[] = {
0x60, /* ASN.1 Application tag */
0x3f, /* total length */
0x06, /* OBJECT IDENTIFIER */
0x09, /* mech length */
0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x01, 0x02, 0x02, /* GSS KRB5 mech */
0x02, 0x01, /* TOK_ID */
0x04, 0x00, /* SGN_ALG (HMAC SHA1 DES3-KD) */
0xff, 0xff, /* SEAL_ALG (none) */
0xff, 0xff, /* Filler */
0xa0, 0xa1, 0xa2, 0xa3, /* encrypted sequence number */
0x00, 0x00, 0x00, 0x00, /* sequence number direction (remote) */
/* checksum */
0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
0xa9, 0xaa, 0xab, 0xac, 0xad,
0xae, 0xaf, 0xb0, 0xb1, 0xb2,
0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
/* unused */
0xb8, 0xb9, 0xba, 0xbb,
0xbc, 0xbd, 0xbe, 0xbf,
/* padding bytes */
0x08, 0x08, 0x08, 0x08,
0x08, 0x08, 0x08, 0x08,
};
input = get_input_buffer(ctx, data, sizeof(data), 65);
expect_value(__wrap_krb5_decrypt_ivec, data, (uint8_t *)input.value + 21);
expect_memory(__wrap_krb5_decrypt_ivec, ivec,
(uint8_t *)input.value + 29, DES_CBLOCK_LEN);
expect_value(__wrap_krb5_verify_checksum, len, 24);
expect_value(__wrap_krb5_verify_checksum, data, (uint8_t *)input.value + 41);
expect_memory(__wrap_krb5_verify_checksum, cksum->checksum.data,
(uint8_t *)input.value + 29, 20);
major_status = _gsskrb5_unwrap(&minor_status,
ctx->context_handle,
&input,
&output,
&conf_state,
&qop_state);
assert_int_equal(GSS_S_COMPLETE, major_status);
assert_int_equal(0, conf_state);
assert_int_equal(GSS_C_QOP_DEFAULT, qop_state);
assert_int_equal(output.length, 0);
major_status = gss_release_buffer(&minor_status, &output);
assert_int_equal(GSS_S_COMPLETE, major_status);
}
static void test_unwrap_with_seal_empty_token_valid(void **state) {
struct context *ctx = *state;
OM_uint32 major_status;
OM_uint32 minor_status;
gss_buffer_desc input = {0};
gss_buffer_desc output = {0};
int conf_state;
gss_qop_t qop_state;
/* See RFC 1964 for token format. */
static const uint8_t data[] = {
0x60, /* ASN.1 Application tag */
0x37, /* total length */
0x06, /* OBJECT IDENTIFIER */
0x09, /* mech length */
0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x01, 0x02, 0x02, /* GSS KRB5 mech */
0x02, 0x01, /* TOK_ID */
0x04, 0x00, /* SGN_ALG (HMAC SHA1 DES3-KD) */
0x02, 0x00, /* SEAL_ALG (DES3-KD) */
0xff, 0xff, /* Filler */
0xa0, 0xa1, 0xa2, 0xa3, /* encrypted sequence number */
0x00, 0x00, 0x00, 0x00, /* sequence number direction (remote) */
/* checksum */
0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
0xa9, 0xaa, 0xab, 0xac, 0xad,
0xae, 0xaf, 0xb0, 0xb1, 0xb2,
0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
/* unused */
0xb8, 0xb9, 0xba, 0xbb,
0xbc, 0xbd, 0xbe,
0x00, /* padding byte */
};
input = get_input_buffer(ctx, data, sizeof(data), 57);
expect_value(__wrap_krb5_decrypt, len, 8);
expect_value(__wrap_krb5_decrypt, data, (uint8_t *)input.value + 49);
expect_value(__wrap_krb5_decrypt_ivec, data, (uint8_t *)input.value + 21);
expect_memory(__wrap_krb5_decrypt_ivec, ivec,
(uint8_t *)input.value + 29, DES_CBLOCK_LEN);
expect_value(__wrap_krb5_verify_checksum, len, 16);
expect_value(__wrap_krb5_verify_checksum, data, (uint8_t *)input.value + 41);
expect_memory(__wrap_krb5_verify_checksum, cksum->checksum.data,
(uint8_t *)input.value + 29, 20);
major_status = _gsskrb5_unwrap(&minor_status,
ctx->context_handle,
&input,
&output,
&conf_state,
&qop_state);
assert_int_equal(GSS_S_COMPLETE, major_status);
assert_int_equal(1, conf_state);
assert_int_equal(GSS_C_QOP_DEFAULT, qop_state);
assert_int_equal(output.length, 0);
major_status = gss_release_buffer(&minor_status, &output);
assert_int_equal(GSS_S_COMPLETE, major_status);
}
static void test_unwrap_with_seal_missing_payload(void **state) {
struct context *ctx = *state;
OM_uint32 major_status;
OM_uint32 minor_status;
gss_buffer_desc input = {0};
gss_buffer_desc output = {0};
int conf_state;
gss_qop_t qop_state;
/* See RFC 1964 for token format. */
static const uint8_t data[] = {
0x60, /* ASN.1 Application tag */
0x14, /* total length */
0x06, /* OBJECT IDENTIFIER */
0x09, /* mech length */
0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x01, 0x02, 0x02, /* GSS KRB5 mech */
0x02, 0x01, /* TOK_ID */
0x04, 0x00, /* SGN_ALG (HMAC SHA1 DES3-KD) */
0x02, 0x00, /* SEAL_ALG (DES3-KD) */
0xff, 0xff, /* Filler */
0xa0, 0xa1, 0xa2, 0xa3, /* encrypted sequence number */
0x00, 0x00, 0x00, 0x00, /* sequence number direction (remote) */
/* checksum */
0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
0xa9, 0xaa, 0xab, 0xac, 0xad,
0xae, 0xaf, 0xb0, 0xb1, 0xb2,
0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
};
input = get_input_buffer(ctx, data, sizeof(data), 22);
major_status = _gsskrb5_unwrap(&minor_status,
ctx->context_handle,
&input,
&output,
&conf_state,
&qop_state);
assert_int_equal(GSS_S_BAD_MECH, major_status);
}
static void test_unwrap_with_seal_valid(void **state) {
struct context *ctx = *state;
OM_uint32 major_status;
OM_uint32 minor_status;
gss_buffer_desc input = {0};
gss_buffer_desc output = {0};
int conf_state;
gss_qop_t qop_state;
/* See RFC 1964 for token format. */
static const uint8_t data[] = {
0x60, /* ASN.1 Application tag */
0x3e, /* total length */
0x06, /* OBJECT IDENTIFIER */
0x09, /* mech length */
0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x01, 0x02, 0x02, /* GSS KRB5 mech */
0x02, 0x01, /* TOK_ID */
0x04, 0x00, /* SGN_ALG (HMAC SHA1 DES3-KD) */
0x02, 0x00, /* SEAL_ALG (DES3-KD) */
0xff, 0xff, /* Filler */
0xa0, 0xa1, 0xa2, 0xa3, /* encrypted sequence number */
0x00, 0x00, 0x00, 0x00, /* sequence number direction (remote) */
/* checksum */
0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
0xa9, 0xaa, 0xab, 0xac, 0xad,
0xae, 0xaf, 0xb0, 0xb1, 0xb2,
0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
/* unused */
0xb8, 0xb9, 0xba, 0xbb,
0xbc, 0xbd, 0xbe, 0xbf,
0xc0, 0xc1, 0xc2, 0xc3,
0xc4, 0xc5,
0x00, /* padding byte */
};
input = get_input_buffer(ctx, data, sizeof(data), 64);
expect_value(__wrap_krb5_decrypt, len, 15);
expect_value(__wrap_krb5_decrypt, data, (uint8_t *)input.value + 49);
expect_value(__wrap_krb5_decrypt_ivec, data, (uint8_t *)input.value + 21);
expect_memory(__wrap_krb5_decrypt_ivec, ivec,
(uint8_t *)input.value + 29, DES_CBLOCK_LEN);
expect_value(__wrap_krb5_verify_checksum, len, 23);
expect_value(__wrap_krb5_verify_checksum, data, (uint8_t *)input.value + 41);
expect_memory(__wrap_krb5_verify_checksum, cksum->checksum.data,
(uint8_t *)input.value + 29, 20);
major_status = _gsskrb5_unwrap(&minor_status,
ctx->context_handle,
&input,
&output,
&conf_state,
&qop_state);
assert_int_equal(GSS_S_COMPLETE, major_status);
assert_int_equal(1, conf_state);
assert_int_equal(GSS_C_QOP_DEFAULT, qop_state);
assert_int_equal(output.length, 7);
assert_memory_equal((uint8_t *)input.value + 57, output.value, output.length);
major_status = gss_release_buffer(&minor_status, &output);
assert_int_equal(GSS_S_COMPLETE, major_status);
}
int main(int argc, const char **argv)
{
static const struct CMUnitTest tests[] = {
cmocka_unit_test_setup_teardown(
test_unwrap_dce_style_missing_payload, setup, teardown),
cmocka_unit_test_setup_teardown(
test_unwrap_dce_style_valid, setup, teardown),
cmocka_unit_test_setup_teardown(
test_unwrap_dce_style_with_seal_missing_payload, setup, teardown),
cmocka_unit_test_setup_teardown(
test_unwrap_dce_style_with_seal_valid, setup, teardown),
cmocka_unit_test_setup_teardown(
test_unwrap_missing_8_bytes, setup, teardown),
cmocka_unit_test_setup_teardown(
test_unwrap_missing_payload, setup, teardown),
cmocka_unit_test_setup_teardown(
test_unwrap_truncated_header_0, setup, teardown),
cmocka_unit_test_setup_teardown(
test_unwrap_truncated_header_1, setup, teardown),
cmocka_unit_test_setup_teardown(
test_unwrap_valid, setup, teardown),
cmocka_unit_test_setup_teardown(
test_unwrap_with_padding_truncated_0, setup, teardown),
cmocka_unit_test_setup_teardown(
test_unwrap_with_padding_truncated_1, setup, teardown),
cmocka_unit_test_setup_teardown(
test_unwrap_with_padding_valid, setup, teardown),
cmocka_unit_test_setup_teardown(
test_unwrap_with_seal_empty_token_valid, setup, teardown),
cmocka_unit_test_setup_teardown(
test_unwrap_with_seal_missing_payload, setup, teardown),
cmocka_unit_test_setup_teardown(
test_unwrap_with_seal_valid, setup, teardown),
};
cmocka_set_message_output(CM_OUTPUT_SUBUNIT);
return cmocka_run_group_tests(tests, NULL, NULL);
}
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