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RIOT/pkg/tinycrypt/patches/0001-Add-a-HKDF-implementation.patch
Francisco Molina bbe3d3acf8
pkg/tinycrypt: use version with hkdf implementation
2021-06-08 14:34:33 +02:00

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From 41f67fba4ece1191851d21178167e953ecb85227 Mon Sep 17 00:00:00 2001
From: Fabio Utzig <utzig@apache.org>
Date: Tue, 31 Mar 2020 17:36:50 -0300
Subject: [PATCH] Add a HKDF implementation
HKDF, as defined by RFC5869, is a simple (HMAC)-based key derivation function,
which can be used as a building block in various protocols and applications.
Signed-off-by: Fabio Utzig <utzig@apache.org>
---
lib/include/tinycrypt/hkdf.h | 102 ++++++++++++++
lib/source/hkdf.c | 141 +++++++++++++++++++
tests/Makefile | 3 +
tests/test_hkdf.c | 264 +++++++++++++++++++++++++++++++++++
4 files changed, 510 insertions(+)
create mode 100644 lib/include/tinycrypt/hkdf.h
create mode 100644 lib/source/hkdf.c
create mode 100644 tests/test_hkdf.c
diff --git a/lib/include/tinycrypt/hkdf.h b/lib/include/tinycrypt/hkdf.h
new file mode 100644
index 0000000..230fba6
--- /dev/null
+++ b/lib/include/tinycrypt/hkdf.h
@@ -0,0 +1,102 @@
+/* hkdf.h - TinyCrypt interface to an HKDF implementation */
+
+/*
+ * Copyright (C) 2020 by JUUL Labs, All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * - 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.
+ *
+ * - Neither the name of Intel Corporation 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 OWNER 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
+ * @brief Interface to an HKDF SHA-256 implementation.
+ *
+ * Overview: HKDF is a simple (HMAC)-based key derivation function (HKDF),
+ * which can be used as a building block in various protocols and
+ * applications. TinyCrypt uses HMAC with hard coded SHA-256 as
+ * the hash function. HKDF is stateless, so no initialization
+ * or context pointers are required for its use.
+ *
+ * Requires: HMAC
+ *
+ * Usage: 1) call tc_hkdf_extract to create a new pseudorandom key. When
+ * a PRK with good random properties is already available by
+ * the HKDF client, calling this function might be skipped.
+ *
+ * 2) call tc_hkdf_expand to expand the given pseudorandom key
+ * into a given number of octets. Usually the PRK will come
+ * from the output of tc_hkdf_extract.
+ */
+
+#ifndef __TC_HKDF_H__
+#define __TC_HKDF_H__
+
+#include <tinycrypt/sha256.h>
+#include <tinycrypt/hmac.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief HKDF extract
+ * Outputs a pseudorandom key of size TC_SHA256_DIGEST_SIZE from input
+ * keying material
+ * @return returns TC_CRYPTO_SUCCCESS (1)
+ * returns TC_CRYPTO_FAIL (0) if:
+ * ikm == NULL or
+ * ikmlen == 0 or
+ * prk == NULL
+ * @param ikm IN -- input keying material
+ * @param ikmlen IN - size of keying material
+ * @param salt IN - optional salt value
+ * @param saltlen IN - size of salt (not used if salt == NULL)
+ * @param prk OUT - output pseudorandom key for expand
+ */
+int tc_hkdf_extract(const void *ikm, size_t ikmlen, const void *salt,
+ size_t saltlen, void *prk);
+
+/**
+ * @brief HKDF expand
+ * Expands a key into L number of bytes written on okm
+ * @return returns TC_CRYPTO_SUCCESS (1)
+ * returns TC_CRYPTO_FAIL (0) if:
+ * prk == NULL or
+ * okm == NULL
+ * @param prk IN -- a pseudorandom key (can be generated with tc_hkdf_extract)
+ * @param info IN -- an application specific information tag
+ * @param infolen IN -- size of info in bytes
+ * @param L IN -- number of bytes of the key to derive into okm
+ * @param okm OUT -- buffer for the key derivation output
+ */
+int tc_hkdf_expand(const void *prk, const void *info, size_t infolen,
+ size_t L, void *okm);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*__TC_HKDF_H__*/
diff --git a/lib/source/hkdf.c b/lib/source/hkdf.c
new file mode 100644
index 0000000..f5ee0ed
--- /dev/null
+++ b/lib/source/hkdf.c
@@ -0,0 +1,141 @@
+/* hkdf.c - TinyCrypt implementation of HKDF-SHA256 */
+
+/*
+ * Copyright (C) 2020 by JUUL Labs, All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * - 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.
+ *
+ * - Neither the name of Intel Corporation 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 OWNER 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 <tinycrypt/hkdf.h>
+#include <tinycrypt/sha256.h>
+#include <tinycrypt/constants.h>
+#include <tinycrypt/utils.h>
+
+int tc_hkdf_extract(const void *ikm, size_t ikmlen, const void *salt,
+ size_t saltlen, void *prk)
+{
+ uint8_t _salt[TC_SHA256_DIGEST_SIZE];
+ struct tc_hmac_state_struct hmac_state;
+ unsigned int rc;
+
+ if (ikm == (const void *) 0 ||
+ ikmlen == 0 ||
+ prk == (void *) 0) {
+ return TC_CRYPTO_FAIL;
+ }
+
+ if (salt == (const void *) 0) {
+ _set(_salt, 0, TC_SHA256_DIGEST_SIZE);
+ rc = tc_hmac_set_key(&hmac_state, _salt, TC_SHA256_DIGEST_SIZE);
+ } else {
+ rc = tc_hmac_set_key(&hmac_state, salt, saltlen);
+ }
+
+ if (rc != TC_CRYPTO_SUCCESS) {
+ return TC_CRYPTO_FAIL;
+ }
+
+ rc = tc_hmac_init(&hmac_state);
+ if (rc != TC_CRYPTO_SUCCESS) {
+ return TC_CRYPTO_FAIL;
+ }
+
+ rc = tc_hmac_update(&hmac_state, ikm, ikmlen);
+ if (rc != TC_CRYPTO_SUCCESS) {
+ return TC_CRYPTO_FAIL;
+ }
+
+ return tc_hmac_final(prk, TC_SHA256_DIGEST_SIZE, &hmac_state);
+}
+
+int tc_hkdf_expand(const void *prk, const void *info, size_t infolen,
+ size_t L, void *okm)
+{
+ uint8_t T[TC_SHA256_DIGEST_SIZE];
+ struct tc_hmac_state_struct hmac_state;
+ uint16_t off;
+ uint16_t len;
+ uint8_t counter;
+ uint8_t *u8okm;
+ bool first;
+ int rc;
+
+ if (prk == (const void *) 0 || okm == (void *) 0) {
+ return TC_CRYPTO_FAIL;
+ }
+
+ u8okm = (uint8_t *)okm;
+ len = L;
+ counter = 1;
+ first = true;
+ for (off = 0; len > 0; off += TC_SHA256_DIGEST_SIZE, ++counter) {
+ rc = tc_hmac_set_key(&hmac_state, prk, TC_SHA256_DIGEST_SIZE);
+ if (rc != TC_CRYPTO_SUCCESS) {
+ return TC_CRYPTO_FAIL;
+ }
+
+ rc = tc_hmac_init(&hmac_state);
+ if (rc != TC_CRYPTO_SUCCESS) {
+ return TC_CRYPTO_FAIL;
+ }
+
+ if (!first) {
+ rc = tc_hmac_update(&hmac_state, T,
+ TC_SHA256_DIGEST_SIZE);
+ if (rc != TC_CRYPTO_SUCCESS) {
+ return TC_CRYPTO_FAIL;
+ }
+ } else {
+ first = false;
+ }
+
+ rc = tc_hmac_update(&hmac_state, info, infolen);
+ if (rc != TC_CRYPTO_SUCCESS) {
+ return TC_CRYPTO_FAIL;
+ }
+
+ rc = tc_hmac_update(&hmac_state, &counter, 1);
+ if (rc != TC_CRYPTO_SUCCESS) {
+ return TC_CRYPTO_FAIL;
+ }
+
+ rc = tc_hmac_final(T, TC_SHA256_DIGEST_SIZE, &hmac_state);
+ if (rc != TC_CRYPTO_SUCCESS) {
+ return TC_CRYPTO_FAIL;
+ }
+
+ if (len > TC_SHA256_DIGEST_SIZE) {
+ memcpy(&u8okm[off], T, TC_SHA256_DIGEST_SIZE);
+ len -= TC_SHA256_DIGEST_SIZE;
+ } else {
+ memcpy(&u8okm[off], T, len);
+ len = 0;
+ }
+ }
+
+ return TC_CRYPTO_SUCCESS;
+}
diff --git a/tests/Makefile b/tests/Makefile
index eff5a88..ce8ce12 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -53,6 +53,9 @@ test_hmac_prng$(DOTEXE): test_hmac_prng.o hmac_prng.o hmac.o \
sha256.o utils.o
$(LINK.o) $^ $(LOADLIBES) $(LDLIBS) -o $@
+test_hkdf$(DOTEXE): test_hkdf.o hkdf.o hmac.o sha256.o utils.o
+ $(LINK.o) $^ $(LOADLIBES) $(LDLIBS) -o $@
+
test_sha256$(DOTEXE): test_sha256.o sha256.o utils.o
$(LINK.o) $^ $(LOADLIBES) $(LDLIBS) -o $@
diff --git a/tests/test_hkdf.c b/tests/test_hkdf.c
new file mode 100644
index 0000000..ef1b817
--- /dev/null
+++ b/tests/test_hkdf.c
@@ -0,0 +1,264 @@
+/* test_hkdf.c - TinyCrypt implementation of some HKDF tests */
+
+/*
+ * Copyright (C) 2020 by JUUL Labs
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * - 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.
+ *
+ * - Neither the name of Intel Corporation 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 OWNER 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.
+ */
+
+/*
+ DESCRIPTION
+ This module tests the following HKDF routines:
+ - tc_hkdf_extract
+ - tc_hkdf_expand
+
+ Scenarios tested include:
+ - HKDF tests (RFC 5869 test vectors)
+*/
+
+#include <tinycrypt/hkdf.h>
+#include <tinycrypt/sha256.h>
+#include <tinycrypt/constants.h>
+#include <test_utils.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+
+#define MAX_L 82
+
+unsigned int do_hkdf_test(unsigned int testnum,
+ const uint8_t *ikm, size_t ikmlen,
+ const uint8_t *salt, size_t saltlen,
+ const uint8_t *info, size_t infolen,
+ const uint8_t *expected_prk, size_t L,
+ const uint8_t *expected_okm)
+{
+ uint8_t prk[TC_SHA256_DIGEST_SIZE];
+ uint8_t okm[MAX_L];
+ unsigned int result = TC_PASS;
+ int rc;
+
+ if (L > MAX_L) {
+ return TC_FAIL;
+ }
+
+ /* Check extract and expand as separate operations */
+ rc = tc_hkdf_extract(ikm, ikmlen, salt, saltlen, prk);
+ if (rc != TC_CRYPTO_SUCCESS) {
+ return TC_FAIL;
+ }
+ result = check_result(testnum, expected_prk, TC_SHA256_DIGEST_SIZE,
+ prk, TC_SHA256_DIGEST_SIZE);
+ if (result != TC_PASS) {
+ return result;
+ }
+ rc = tc_hkdf_expand(prk, info, infolen, L, okm);
+ if (rc != TC_CRYPTO_SUCCESS) {
+ return TC_FAIL;
+ }
+ return check_result(testnum, expected_okm, L, okm, L);
+}
+
+/*
+ * RFC5869 HKDF-SHA256 test vectors
+ */
+unsigned int test_1(void)
+{
+ unsigned int result = TC_PASS;
+ TC_PRINT("HKDF %s:\n", __func__);
+
+ const uint8_t IKM[22] = {
+ 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 salt[13] = {
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+ 0x08, 0x09, 0x0a, 0x0b, 0x0c,
+ };
+ const uint8_t info[10] = {
+ 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
+ 0xf8, 0xf9,
+ };
+ const uint8_t PRK[TC_SHA256_DIGEST_SIZE] = {
+ 0x07, 0x77, 0x09, 0x36, 0x2c, 0x2e, 0x32, 0xdf,
+ 0x0d, 0xdc, 0x3f, 0x0d, 0xc4, 0x7b, 0xba, 0x63,
+ 0x90, 0xb6, 0xc7, 0x3b, 0xb5, 0x0f, 0x9c, 0x31,
+ 0x22, 0xec, 0x84, 0x4a, 0xd7, 0xc2, 0xb3, 0xe5,
+ };
+ const uint8_t L = 42;
+ const uint8_t OKM[42] = {
+ 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,
+ };
+
+ result = do_hkdf_test(1, IKM, sizeof(IKM), salt,
+ sizeof(salt), info, sizeof(info), PRK, L, OKM);
+ TC_END_RESULT(result);
+ return result;
+}
+
+unsigned int test_2(void)
+{
+ unsigned int result = TC_PASS;
+ TC_PRINT("HKDF %s:\n", __func__);
+ const uint8_t IKM[80] = {
+ 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 salt[80] = {
+ 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 info[80] = {
+ 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 PRK[TC_SHA256_DIGEST_SIZE] = {
+ 0x06, 0xa6, 0xb8, 0x8c, 0x58, 0x53, 0x36, 0x1a,
+ 0x06, 0x10, 0x4c, 0x9c, 0xeb, 0x35, 0xb4, 0x5c,
+ 0xef, 0x76, 0x00, 0x14, 0x90, 0x46, 0x71, 0x01,
+ 0x4a, 0x19, 0x3f, 0x40, 0xc1, 0x5f, 0xc2, 0x44,
+ };
+ const uint8_t L = 82;
+ const uint8_t OKM[82] = {
+ 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,
+ };
+
+ result = do_hkdf_test(2, IKM, sizeof(IKM), salt,
+ sizeof(salt), info, sizeof(info), PRK, L, OKM);
+ TC_END_RESULT(result);
+ return result;
+}
+
+unsigned int test_3(void)
+{
+ unsigned int result = TC_PASS;
+ TC_PRINT("HKDF %s:\n", __func__);
+ const uint8_t IKM[22] = {
+ 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 *salt = NULL;
+ const uint8_t *info = NULL;
+ const uint8_t PRK[TC_SHA256_DIGEST_SIZE] = {
+ 0x19, 0xef, 0x24, 0xa3, 0x2c, 0x71, 0x7b, 0x16,
+ 0x7f, 0x33, 0xa9, 0x1d, 0x6f, 0x64, 0x8b, 0xdf,
+ 0x96, 0x59, 0x67, 0x76, 0xaf, 0xdb, 0x63, 0x77,
+ 0xac, 0x43, 0x4c, 0x1c, 0x29, 0x3c, 0xcb, 0x04,
+ };
+ const uint8_t L = 42;
+ const uint8_t OKM[42] = {
+ 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,
+ };
+
+ result = do_hkdf_test(3, IKM, sizeof(IKM), salt, 0, info, 0, PRK,
+ L, OKM);
+ TC_END_RESULT(result);
+ return result;
+}
+
+/*
+ * Main task to test HKDF
+ */
+int main(void)
+{
+ unsigned int result = TC_PASS;
+
+ TC_START("Performing HKDF tests (RFC5869 test vectors):");
+
+ result = test_1();
+ if (result == TC_FAIL) {
+ /* terminate test */
+ TC_ERROR("HKDF test #1 failed.\n");
+ goto exitTest;
+ }
+ result = test_2();
+ if (result == TC_FAIL) {
+ /* terminate test */
+ TC_ERROR("HKDF test #2 failed.\n");
+ goto exitTest;
+ }
+ result = test_3();
+ if (result == TC_FAIL) {
+ /* terminate test */
+ TC_ERROR("HKDF test #3 failed.\n");
+ goto exitTest;
+ }
+
+ TC_PRINT("All HKDF tests succeeded!\n");
+
+exitTest:
+ TC_END_RESULT(result);
+ TC_END_REPORT(result);
+}
--
2.28.0
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