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[crypto] adding HMAC Key Derivation Function (HKDF) using SHA-256 (#4440)

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This commit adds a new class `Crypto::HkdfSha256` which implements
HMAC-based Extract-and-Expand Key Derivation Function from RFC-5869
using SHA-256. It also adds a unit test for the new module.
This commit is contained in:
Abtin Keshavarzian
2020-12-10 11:46:07 -08:00
committed by Jonathan Hui
parent 61e77bf6ed
commit 48333ce530
11 changed files with 401 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Android.mk
+1
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@@ -203,6 +203,7 @@ LOCAL_SRC_FILES := \
src/core/common/trickle_timer.cpp \
src/core/crypto/aes_ccm.cpp \
src/core/crypto/aes_ecb.cpp \
src/core/crypto/hkdf_sha256.cpp \
src/core/crypto/hmac_sha256.cpp \
src/core/crypto/mbedtls.cpp \
src/core/crypto/pbkdf2_cmac.cpp \
src/core/BUILD.gn
+2
View File
@@ -397,6 +397,8 @@ openthread_core_files = [
"crypto/aes_ecb.hpp",
"crypto/ecdsa.cpp",
"crypto/ecdsa.hpp",
"crypto/hkdf_sha256.cpp",
"crypto/hkdf_sha256.hpp",
"crypto/hmac_sha256.cpp",
"crypto/hmac_sha256.hpp",
"crypto/mbedtls.cpp",
src/core/CMakeLists.txt
+1
View File
@@ -94,6 +94,7 @@ set(COMMON_SOURCES
crypto/aes_ccm.cpp
crypto/aes_ecb.cpp
crypto/ecdsa.cpp
crypto/hkdf_sha256.cpp
crypto/hmac_sha256.cpp
crypto/mbedtls.cpp
crypto/pbkdf2_cmac.cpp
src/core/Makefile.am
+2
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@@ -171,6 +171,7 @@ SOURCES_COMMON = \
crypto/aes_ccm.cpp \
crypto/aes_ecb.cpp \
crypto/ecdsa.cpp \
crypto/hkdf_sha256.cpp \
crypto/hmac_sha256.cpp \
crypto/mbedtls.cpp \
crypto/pbkdf2_cmac.cpp \
@@ -403,6 +404,7 @@ HEADERS_COMMON = \
crypto/aes_ccm.hpp \
crypto/aes_ecb.hpp \
crypto/ecdsa.hpp \
crypto/hkdf_sha256.hpp \
crypto/hmac_sha256.hpp \
crypto/mbedtls.hpp \
crypto/pbkdf2_cmac.h \
src/core/crypto/hkdf_sha256.cpp
+96
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@@ -0,0 +1,96 @@
/*
* Copyright (c) 2020, The OpenThread Authors.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @file
* This file implements HMAC-based Extract-and-Expand Key Derivation Function (HKDF) using SHA-256.
*/
#include "hkdf_sha256.hpp"
#include <string.h>
namespace ot {
namespace Crypto {
void HkdfSha256::Extract(const uint8_t *aSalt, uint16_t aSaltLength, const uint8_t *aInputKey, uint16_t aInputKeyLength)
{
HmacSha256 hmac;
// PRK is calculated as HMAC-Hash(aSalt, aInputKey)
hmac.Start(aSalt, aSaltLength);
hmac.Update(aInputKey, aInputKeyLength);
hmac.Finish(mPrk);
}
void HkdfSha256::Expand(const uint8_t *aInfo, uint16_t aInfoLength, uint8_t *aOutputKey, uint16_t aOutputKeyLength)
{
HmacSha256 hmac;
uint8_t hash[kHashSize];
uint8_t iter = 0;
uint16_t copyLength;
// The aOutputKey is calculated as follows [RFC5889]:
//
// N = ceil( aOutputKeyLength / HashSize)
// T = T(1) | T(2) | T(3) | ... | T(N)
// aOutputKey is first aOutputKeyLength of T
//
// Where:
// T(0) = empty string (zero length)
// T(1) = HMAC-Hash(PRK, T(0) | info | 0x01)
// T(2) = HMAC-Hash(PRK, T(1) | info | 0x02)
// T(3) = HMAC-Hash(PRK, T(2) | info | 0x03)
// ...
while (aOutputKeyLength > 0)
{
hmac.Start(mPrk, sizeof(mPrk));
if (iter != 0)
{
hmac.Update(hash, sizeof(hash));
}
hmac.Update(aInfo, aInfoLength);
iter++;
hmac.Update(&iter, sizeof(iter));
hmac.Finish(hash);
copyLength = (aOutputKeyLength > sizeof(hash)) ? sizeof(hash) : aOutputKeyLength;
memcpy(aOutputKey, hash, copyLength);
aOutputKey += copyLength;
aOutputKeyLength -= copyLength;
}
}
} // namespace Crypto
} // namespace ot
src/core/crypto/hkdf_sha256.hpp
+103
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@@ -0,0 +1,103 @@
/*
* Copyright (c) 2020, The OpenThread Authors.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @file
* This file includes definitions for performing HMAC-based Extract-and-Expand Key Derivation Function (HKDF) using
* SHA-256.
*/
#ifndef HKDF_SHA256_HPP_
#define HKDF_SHA256_HPP_
#include "openthread-core-config.h"
#include "hmac_sha256.hpp"
namespace ot {
namespace Crypto {
/**
* @addtogroup core-security
*
* @{
*
*/
/**
* This class implements HMAC-based Extract-and-Expand Key Derivation Function (HKDF) [RFC5869] using SHA-256.
*
*/
class HkdfSha256
{
public:
/**
* This method performs the HKDF Extract step.
*
* In the Extract step getting an input key extracts from it a pseudo-random key.
*
* @param[in] aSalt A pointer to buffer containing salt.
* @param[in] aSaltLength The salt length (in bytes).
* @param[in] aInputKey A pointer to buffer containing the input key.
* @param[in] aInputKeyLength The input key length (in bytes).
*
*/
void Extract(const uint8_t *aSalt, uint16_t aSaltLength, const uint8_t *aInputKey, uint16_t aInputKeyLength);
/**
* This method performs the HKDF Expand step.
*
* The method should be used after a previous `Extract` call, otherwise its behavior is undefined. In the Expand
* stage an output key of a given length is derived from the pseudo-random key of Extract stage.
*
* @param[in] aInfo A pointer to buffer containing info sequence.
* @param[in] aInfoLength The info length (in bytes).
* @param[out] aOutputKey Buffer to place the output key (must contain at least @p aOutputKeyLength bytes).
* @param[in] aOutputKeyLength The output key length.
*
*/
void Expand(const uint8_t *aInfo, uint16_t aInfoLength, uint8_t *aOutputKey, uint16_t aOutputKeyLength);
private:
enum
{
kHashSize = HmacSha256::kHashSize,
};
uint8_t mPrk[kHashSize]; // Pseudo-Random Key (derived from Extract step).
};
/**
* @}
*
*/
} // namespace Crypto
} // namespace ot
#endif // HKDF_SHA256_HPP_
tests/unit/CMakeLists.txt
+28
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@@ -236,6 +236,33 @@ target_link_libraries(test-heap
add_test(NAME test-heap COMMAND test-heap)
add_executable(test-hkdf-sha256
${COMMON_SOURCES}
test_hkdf_sha256.cpp
)
target_include_directories(test-hkdf-sha256
PRIVATE
${COMMON_INCLUDES}
)
target_compile_definitions(test-hkdf-sha256
PRIVATE
${OT_PRIVATE_DEFINES}
)
target_compile_options(test-hkdf-sha256
PRIVATE
${COMMON_COMPILE_OPTIONS}
)
target_link_libraries(test-hkdf-sha256
PRIVATE
${COMMON_LIBS}
)
add_test(NAME test-hkdf-sha256 COMMAND test-hkdf-sha256)
add_executable(test-hmac-sha256
test_hmac_sha256.cpp
)
@@ -668,6 +695,7 @@ set_target_properties(
test-dns
test-flash
test-heap
test-hkdf-sha256
test-hmac-sha256
test-ip6-address
test-link-quality
tests/unit/Makefile.am
+4
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@@ -114,6 +114,7 @@ check_PROGRAMS += \
test-dns \
test-flash \
test-heap \
test-hkdf-sha256 \
test-hmac-sha256 \
test-ip6-address \
test-link-quality \
@@ -201,6 +202,9 @@ test_hdlc_SOURCES = $(COMMON_SOURCES) test_hdlc.cpp
test_heap_LDADD = $(COMMON_LDADD)
test_heap_SOURCES = $(COMMON_SOURCES) test_heap.cpp
test_hkdf_sha256_LDADD = $(COMMON_LDADD)
test_hkdf_sha256_SOURCES = $(COMMON_SOURCES) test_hkdf_sha256.cpp
test_hmac_sha256_LDADD = $(COMMON_LDADD)
test_hmac_sha256_SOURCES = $(COMMON_SOURCES) test_hmac_sha256.cpp
tests/unit/test_hkdf_sha256.cpp
+162
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@@ -0,0 +1,162 @@
/*
* Copyright (c) 2020, The OpenThread Authors.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <openthread/config.h>
#include "common/debug.hpp"
#include "crypto/hkdf_sha256.hpp"
#include "test_platform.h"
#include "test_util.h"
#include "test_util.hpp"
struct TestVector
{
const uint8_t *mInKey;
uint16_t mInKeyLength;
const uint8_t *mSalt;
uint16_t mSaltLength;
const uint8_t *mInfo;
uint16_t mInfoLength;
const uint8_t *mOutKey;
uint16_t mOutKeyLength;
};
void TestHkdfSha256(void)
{
enum
{
kMaxOuttKey = 128,
kFillByte = 0x77,
};
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// Test Case #1: RFC-5869 Appendix A.1
const uint8_t kInKey1[] = {0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b};
const uint8_t kSalt1[] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c};
const uint8_t kInfo1[] = {0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9};
const uint8_t kOutKey1[] = {0x3c, 0xb2, 0x5f, 0x25, 0xfa, 0xac, 0xd5, 0x7a, 0x90, 0x43, 0x4f, 0x64, 0xd0, 0x36,
0x2f, 0x2a, 0x2d, 0x2d, 0x0a, 0x90, 0xcf, 0x1a, 0x5a, 0x4c, 0x5d, 0xb0, 0x2d, 0x56,
0xec, 0xc4, 0xc5, 0xbf, 0x34, 0x00, 0x72, 0x08, 0xd5, 0xb8, 0x87, 0x18, 0x58, 0x65};
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// Test Case #2: RFC-5869 Appendix A.2
const uint8_t kInKey2[] = {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, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45,
0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f};
const uint8_t kSalt2[] = {0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d,
0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b,
0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5,
0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf};
const uint8_t kInfo2[] = {0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd,
0xbe, 0xbf, 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb,
0xcc, 0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9,
0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5,
0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff};
const uint8_t kOutKey2[] = {0xb1, 0x1e, 0x39, 0x8d, 0xc8, 0x03, 0x27, 0xa1, 0xc8, 0xe7, 0xf7, 0x8c, 0x59, 0x6a,
0x49, 0x34, 0x4f, 0x01, 0x2e, 0xda, 0x2d, 0x4e, 0xfa, 0xd8, 0xa0, 0x50, 0xcc, 0x4c,
0x19, 0xaf, 0xa9, 0x7c, 0x59, 0x04, 0x5a, 0x99, 0xca, 0xc7, 0x82, 0x72, 0x71, 0xcb,
0x41, 0xc6, 0x5e, 0x59, 0x0e, 0x09, 0xda, 0x32, 0x75, 0x60, 0x0c, 0x2f, 0x09, 0xb8,
0x36, 0x77, 0x93, 0xa9, 0xac, 0xa3, 0xdb, 0x71, 0xcc, 0x30, 0xc5, 0x81, 0x79, 0xec,
0x3e, 0x87, 0xc1, 0x4c, 0x01, 0xd5, 0xc1, 0xf3, 0x43, 0x4f, 0x1d, 0x87};
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// Test Case #3: RFC-5869 Appendix A.3
const uint8_t kInKey3[] = {0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b};
const uint8_t kOutKey3[] = {0x8d, 0xa4, 0xe7, 0x75, 0xa5, 0x63, 0xc1, 0x8f, 0x71, 0x5f, 0x80, 0x2a, 0x06, 0x3c,
0x5a, 0x31, 0xb8, 0xa1, 0x1f, 0x5c, 0x5e, 0xe1, 0x87, 0x9e, 0xc3, 0x45, 0x4e, 0x5f,
0x3c, 0x73, 0x8d, 0x2d, 0x9d, 0x20, 0x13, 0x95, 0xfa, 0xa4, 0xb6, 0x1a, 0x96, 0xc8};
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// Test Case #4:
const uint8_t kInKey4[] = {'h', 'e', 'l', 'l', 'o'};
const uint8_t kSalt4[] = {0x8e, 0x94, 0xef, 0x80, 0x5b, 0x93, 0xe6, 0x83, 0xff, 0x18};
const uint8_t kOutKey4[] = {0x13, 0x48, 0x50, 0x67, 0xe2, 0x1a, 0xf1, 0x7c,
0x09, 0x00, 0xf7, 0x0d, 0x88, 0x5f, 0x02, 0x59};
const TestVector kTestVectors[] = {
{kInKey1, sizeof(kInKey1), kSalt1, sizeof(kSalt1), kInfo1, sizeof(kInfo1), kOutKey1, sizeof(kOutKey1)},
{kInKey2, sizeof(kInKey2), kSalt2, sizeof(kSalt2), kInfo2, sizeof(kInfo2), kOutKey2, sizeof(kOutKey2)},
{kInKey3, sizeof(kInKey3), nullptr, 0, nullptr, 0, kOutKey3, sizeof(kOutKey3)},
{kInKey4, sizeof(kInKey4), kSalt4, sizeof(kSalt4), nullptr, 0, kOutKey4, sizeof(kOutKey4)},
};
otInstance *instance = testInitInstance();
VerifyOrQuit(instance != nullptr, "Null OpenThread instance");
for (const TestVector *test = &kTestVectors[0]; test < OT_ARRAY_END(kTestVectors); test++)
{
ot::Crypto::HkdfSha256 hkdf;
uint8_t outKey[kMaxOuttKey];
printf("\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
DumpBuffer("\nInput Key", test->mInKey, test->mInKeyLength);
DumpBuffer("\nSalt", test->mSalt, test->mSaltLength);
DumpBuffer("\nInfo", test->mInfo, test->mInfoLength);
DumpBuffer("\nExpected Output Key", test->mOutKey, test->mOutKeyLength);
memset(outKey, kFillByte, sizeof(outKey));
hkdf.Extract(test->mSalt, test->mSaltLength, test->mInKey, test->mInKeyLength);
hkdf.Expand(test->mInfo, test->mInfoLength, outKey, test->mOutKeyLength);
DumpBuffer("\nCalculated Output Key", outKey, test->mOutKeyLength);
VerifyOrQuit(memcmp(outKey, test->mOutKey, test->mOutKeyLength) == 0, "HKDF-SHA-256 failed");
for (uint16_t i = test->mOutKeyLength + 1; i < sizeof(outKey); i++)
{
VerifyOrQuit(outKey[i] == kFillByte, "HKDF-SHA-256 wrote beyond output key length");
}
}
testFreeInstance(instance);
}
int main(void)
{
TestHkdfSha256();
printf("All tests passed\n");
return 0;
}
tests/unit/test_util.cpp
+1 -1
View File
@@ -30,7 +30,7 @@
#include <ctype.h>
void DumpBuffer(const char *aTextMessage, uint8_t *aBuffer, uint16_t aBufferLength)
void DumpBuffer(const char *aTextMessage, const uint8_t *aBuffer, uint16_t aBufferLength)
{
enum
{
tests/unit/test_util.hpp
+1 -1
View File
@@ -41,6 +41,6 @@
* @param[in] aBufferLength Number of bytes in the buffer.
*
*/
void DumpBuffer(const char *aTextMessage, uint8_t *aBuffer, uint16_t aBufferLength);
void DumpBuffer(const char *aTextMessage, const uint8_t *aBuffer, uint16_t aBufferLength);
#endif