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pk11_prf_unittest.cc
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pk11_prf_unittest.cc
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <memory>
#include "nss.h"
#include "pk11pub.h"
#include "cpputil.h"
#include "gtest/gtest.h"
namespace nss_test {
const size_t kPmsSize = 48;
const size_t kMasterSecretSize = 48;
const size_t kPrfSeedSizeSha256 = 32;
const size_t kPrfSeedSizeTlsPrf = 36;
// This is not the right size for anything
const size_t kIncorrectSize = 17;
const uint8_t kPmsData[] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f};
const uint8_t kPrfSeed[] = {
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb,
0xfc, 0xfd, 0xfe, 0xff, 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, 0xd0, 0xd1, 0xd2, 0xd3};
const uint8_t kExpectedOutputEmsSha256[] = {
0x75, 0xa7, 0xa5, 0x98, 0xef, 0xab, 0x90, 0xe7, 0x7c, 0x67, 0x80, 0xde,
0xab, 0x3a, 0x11, 0xf3, 0x5d, 0xb2, 0xf8, 0x47, 0xff, 0x09, 0x01, 0xec,
0xf8, 0x93, 0x89, 0xfc, 0x98, 0x2e, 0x6e, 0xf9, 0x2c, 0xf5, 0x9b, 0x04,
0x04, 0x6f, 0xd7, 0x28, 0x6e, 0xea, 0xe3, 0x83, 0xc4, 0x4a, 0xff, 0x03};
const uint8_t kExpectedOutputEmsTlsPrf[] = {
0x06, 0xbf, 0x29, 0x86, 0x5d, 0xf3, 0x3e, 0x38, 0xfd, 0xfa, 0x91, 0x10,
0x2a, 0x20, 0xff, 0xd6, 0xb9, 0xd5, 0x72, 0x5a, 0x6d, 0x42, 0x20, 0x16,
0xde, 0xa4, 0xa0, 0x51, 0xe5, 0x53, 0xc1, 0x28, 0x04, 0x99, 0xbc, 0xb1,
0x2c, 0x9d, 0xe8, 0x0b, 0x18, 0xa2, 0x0e, 0x48, 0x52, 0x8d, 0x61, 0x13};
class TlsPrfTest : public ::testing::Test {
public:
TlsPrfTest()
: params_({siBuffer, nullptr, 0}),
pms_item_({siBuffer, toUcharPtr(kPmsData), kPmsSize}),
key_mech_(0),
slot_(nullptr),
pms_(nullptr),
ms_(nullptr),
pms_version_({0, 0}) {}
~TlsPrfTest() {
if (slot_) {
PK11_FreeSlot(slot_);
}
ClearTempVars();
}
void ClearTempVars() {
if (pms_) {
PK11_FreeSymKey(pms_);
}
if (ms_) {
PK11_FreeSymKey(ms_);
}
}
void Init() {
params_.type = siBuffer;
pms_item_.type = siBuffer;
pms_item_.data =
const_cast<unsigned char*>(static_cast<const unsigned char*>(kPmsData));
slot_ = PK11_GetInternalSlot();
ASSERT_NE(nullptr, slot_);
}
void CheckForError(CK_MECHANISM_TYPE hash_mech, size_t seed_len,
size_t pms_len, size_t output_len) {
// Error tests don't depend on the derivation mechansim
Inner(CKM_NSS_TLS_EXTENDED_MASTER_KEY_DERIVE, hash_mech, seed_len, pms_len,
output_len, nullptr, nullptr);
}
void ComputeAndVerifyMs(CK_MECHANISM_TYPE derive_mech,
CK_MECHANISM_TYPE hash_mech, CK_VERSION* version,
const uint8_t* expected) {
// Infer seed length from mechanism
int seed_len = 0;
switch (hash_mech) {
case CKM_TLS_PRF:
seed_len = kPrfSeedSizeTlsPrf;
break;
case CKM_SHA256:
seed_len = kPrfSeedSizeSha256;
break;
default:
ASSERT_TRUE(false);
}
Inner(derive_mech, hash_mech, seed_len, kPmsSize, 0, version, expected);
}
// Set output == nullptr to test when errors occur
void Inner(CK_MECHANISM_TYPE derive_mech, CK_MECHANISM_TYPE hash_mech,
size_t seed_len, size_t pms_len, size_t output_len,
CK_VERSION* version, const uint8_t* expected) {
ClearTempVars();
// Infer the key mechanism from the hash type
switch (hash_mech) {
case CKM_TLS_PRF:
key_mech_ = CKM_TLS_KEY_AND_MAC_DERIVE;
break;
case CKM_SHA256:
key_mech_ = CKM_NSS_TLS_KEY_AND_MAC_DERIVE_SHA256;
break;
default:
ASSERT_TRUE(false);
}
// Import the params
CK_NSS_TLS_EXTENDED_MASTER_KEY_DERIVE_PARAMS master_params = {
hash_mech, toUcharPtr(kPrfSeed), static_cast<CK_ULONG>(seed_len),
version};
params_.data = reinterpret_cast<unsigned char*>(&master_params);
params_.len = sizeof(master_params);
// Import the PMS
pms_item_.len = pms_len;
pms_ = PK11_ImportSymKey(slot_, derive_mech, PK11_OriginUnwrap, CKA_DERIVE,
&pms_item_, NULL);
ASSERT_NE(nullptr, pms_);
// Compute the EMS
ms_ = PK11_DeriveWithFlags(pms_, derive_mech, ¶ms_, key_mech_,
CKA_DERIVE, output_len, CKF_SIGN | CKF_VERIFY);
// Verify the EMS has the expected value (null or otherwise)
if (!expected) {
EXPECT_EQ(nullptr, ms_);
} else {
ASSERT_NE(nullptr, ms_);
SECStatus rv = PK11_ExtractKeyValue(ms_);
ASSERT_EQ(SECSuccess, rv);
SECItem* msData = PK11_GetKeyData(ms_);
ASSERT_NE(nullptr, msData);
ASSERT_EQ(kMasterSecretSize, msData->len);
EXPECT_EQ(0, memcmp(msData->data, expected, kMasterSecretSize));
}
}
protected:
SECItem params_;
SECItem pms_item_;
CK_MECHANISM_TYPE key_mech_;
PK11SlotInfo* slot_;
PK11SymKey* pms_;
PK11SymKey* ms_;
CK_VERSION pms_version_;
};
TEST_F(TlsPrfTest, ExtendedMsParamErr) {
Init();
// This should fail; it's the correct set from which the below are derived
// CheckForError(CKM_NSS_TLS_EXTENDED_MASTER_KEY_DERIVE, CKM_TLS_PRF,
// kPrfSeedSizeTlsPrf, kPmsSize, 0);
// Output key size != 0, SSL3_MASTER_SECRET_LENGTH
CheckForError(CKM_TLS_PRF, kPrfSeedSizeTlsPrf, kPmsSize, kIncorrectSize);
// not-DH && pms size != SSL3_PMS_LENGTH
CheckForError(CKM_TLS_PRF, kPrfSeedSizeTlsPrf, kIncorrectSize, 0);
// CKM_TLS_PRF && seed length != MD5_LENGTH + SHA1_LENGTH
CheckForError(CKM_TLS_PRF, kIncorrectSize, kPmsSize, 0);
// !CKM_TLS_PRF && seed length != hash output length
CheckForError(CKM_SHA256, kIncorrectSize, kPmsSize, 0);
}
// Test matrix:
//
// DH RSA
// TLS_PRF 1 2
// SHA256 3 4
TEST_F(TlsPrfTest, ExtendedMsDhTlsPrf) {
Init();
ComputeAndVerifyMs(CKM_NSS_TLS_EXTENDED_MASTER_KEY_DERIVE_DH, CKM_TLS_PRF,
nullptr, kExpectedOutputEmsTlsPrf);
}
TEST_F(TlsPrfTest, ExtendedMsRsaTlsPrf) {
Init();
ComputeAndVerifyMs(CKM_NSS_TLS_EXTENDED_MASTER_KEY_DERIVE, CKM_TLS_PRF,
&pms_version_, kExpectedOutputEmsTlsPrf);
EXPECT_EQ(0, pms_version_.major);
EXPECT_EQ(1, pms_version_.minor);
}
TEST_F(TlsPrfTest, ExtendedMsDhSha256) {
Init();
ComputeAndVerifyMs(CKM_NSS_TLS_EXTENDED_MASTER_KEY_DERIVE_DH, CKM_SHA256,
nullptr, kExpectedOutputEmsSha256);
}
TEST_F(TlsPrfTest, ExtendedMsRsaSha256) {
Init();
ComputeAndVerifyMs(CKM_NSS_TLS_EXTENDED_MASTER_KEY_DERIVE, CKM_SHA256,
&pms_version_, kExpectedOutputEmsSha256);
EXPECT_EQ(0, pms_version_.major);
EXPECT_EQ(1, pms_version_.minor);
}
} // namespace nss_test