6 files changed, 496 insertions, 2 deletions

diff --git a/src/lib/libcrypto/Makefile b/src/lib/libcrypto/Makefile
index 13f4ab0de5..6454d6b109 100644
--- a/src/lib/libcrypto/Makefile
+++ b/src/lib/libcrypto/Makefile
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.16 2017/04/30 04:44:58 jsing Exp $
+# $OpenBSD: Makefile,v 1.17 2017/05/06 20:42:57 beck Exp $
 
 LIB=    crypto
 
@@ -169,6 +169,9 @@ SRCS+= gost89imit_pmeth.c gost_asn1.c gost_err.c gostr341001.c
 SRCS+= gostr341001_ameth.c gostr341001_key.c gostr341001_params.c
 SRCS+= gostr341001_pmeth.c gostr341194.c streebog.c
 
+# hkdf/
+SRCS+= hkdf.c
+
 # hmac/
 SRCS+= hmac.c hm_ameth.c hm_pmeth.c
 
@@ -287,6 +290,7 @@ SRCS+= pcy_cache.c pcy_node.c pcy_data.c pcy_map.c pcy_tree.c pcy_lib.c
         ${LCRYPTO_SRC}/err \
         ${LCRYPTO_SRC}/evp \
         ${LCRYPTO_SRC}/gost \
+        ${LCRYPTO_SRC}/hkdf \
         ${LCRYPTO_SRC}/hmac \
         ${LCRYPTO_SRC}/idea \
         ${LCRYPTO_SRC}/lhash \
@@ -344,6 +348,7 @@ HDRS=\
         ${LCRYPTO_SRC}/err/err.h \
         ${LCRYPTO_SRC}/evp/evp.h \
         ${LCRYPTO_SRC}/gost/gost.h \
+        ${LCRYPTO_SRC}/hkdf/hkdf.h \
         ${LCRYPTO_SRC}/hmac/hmac.h \
         ${LCRYPTO_SRC}/idea/idea.h \
         ${LCRYPTO_SRC}/lhash/lhash.h \
diff --git a/src/lib/libcrypto/hkdf/hkdf.c b/src/lib/libcrypto/hkdf/hkdf.c
new file mode 100644
index 0000000000..9fe587de13
--- /dev/null
+++ b/src/lib/libcrypto/hkdf/hkdf.c
@@ -0,0 +1,116 @@
+/* Copyright (c) 2014, Google Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <openssl/hkdf.h>
+
+#include <assert.h>
+#include <string.h>
+
+#include <openssl/err.h>
+#include <openssl/hmac.h>
+
+/* https://tools.ietf.org/html/rfc5869#section-2 */
+int
+HKDF(uint8_t *out_key, size_t out_len, const EVP_MD *digest,
+    const uint8_t *secret, size_t secret_len, const uint8_t *salt,
+    size_t salt_len, const uint8_t *info, size_t info_len)
+{
+        uint8_t prk[EVP_MAX_MD_SIZE];
+        size_t prk_len;
+
+        if (!HKDF_extract(prk, &prk_len, digest, secret, secret_len, salt,
+                salt_len))
+                return 0;
+        if (!HKDF_expand(out_key, out_len, digest, prk, prk_len, info,
+                info_len))
+                return 0;
+
+        return 1;
+}
+
+/* https://tools.ietf.org/html/rfc5869#section-2.2 */
+int
+HKDF_extract(uint8_t *out_key, size_t *out_len,
+    const EVP_MD *digest, const uint8_t *secret, size_t secret_len,
+    const uint8_t *salt, size_t salt_len)
+{
+        unsigned int len;
+
+        /*
+         * If salt is not given, HashLength zeros are used. However, HMAC does that
+         * internally already so we can ignore it.
+         */
+        if (HMAC(digest, salt, salt_len, secret, secret_len, out_key, &len) ==
+            NULL) {
+                CRYPTOerror(ERR_R_CRYPTO_LIB);
+                return 0;
+        }
+        *out_len = len;
+        return 1;
+}
+
+/* https://tools.ietf.org/html/rfc5869#section-2.3 */
+int
+HKDF_expand(uint8_t *out_key, size_t out_len,
+    const EVP_MD *digest, const uint8_t *prk, size_t prk_len,
+    const uint8_t *info, size_t info_len)
+{
+        const size_t digest_len = EVP_MD_size(digest);
+        uint8_t previous[EVP_MAX_MD_SIZE];
+        size_t n, done = 0;
+        unsigned int i;
+        int ret = 0;
+        HMAC_CTX hmac;
+
+        /* Expand key material to desired length. */
+        n = (out_len + digest_len - 1) / digest_len;
+        if (out_len + digest_len < out_len || n > 255) {
+                CRYPTOerror(EVP_R_TOO_LARGE);
+                return 0;
+        }
+
+        HMAC_CTX_init(&hmac);
+        if (!HMAC_Init_ex(&hmac, prk, prk_len, digest, NULL))
+                goto out;
+
+        for (i = 0; i < n; i++) {
+                uint8_t ctr = i + 1;
+                size_t todo;
+
+                if (i != 0 && (!HMAC_Init_ex(&hmac, NULL, 0, NULL, NULL) ||
+                        !HMAC_Update(&hmac, previous, digest_len)))
+                        goto out;
+
+                if (!HMAC_Update(&hmac, info, info_len) ||
+                    !HMAC_Update(&hmac, &ctr, 1) ||
+                    !HMAC_Final(&hmac, previous, NULL))
+                        goto out;
+
+                todo = digest_len;
+                if (done + todo > out_len)
+                        todo = out_len - done;
+
+                memcpy(out_key + done, previous, todo);
+                done += todo;
+        }
+
+        ret = 1;
+
+ out:
+        HMAC_CTX_cleanup(&hmac);
+        if (ret != 1)
+                CRYPTOerror(ERR_R_CRYPTO_LIB);
+        return ret;
+}
diff --git a/src/lib/libcrypto/hkdf/hkdf.h b/src/lib/libcrypto/hkdf/hkdf.h
new file mode 100644
index 0000000000..fb0fac37af
--- /dev/null
+++ b/src/lib/libcrypto/hkdf/hkdf.h
@@ -0,0 +1,64 @@
+/* Copyright (c) 2014, Google Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#ifndef OPENSSL_HEADER_HKDF_H
+#define OPENSSL_HEADER_HKDF_H
+
+#include <openssl/evp.h>
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+/*
+ * HKDF computes HKDF (as specified by RFC 5869) of initial keying
+ * material |secret| with |salt| and |info| using |digest|, and
+ * outputs |out_len| bytes to |out_key|. It returns one on success and
+ * zero on error.
+ *
+ * HKDF is an Extract-and-Expand algorithm. It does not do any key
+ * stretching, and as such, is not suited to be used alone to generate
+ * a key from a password.
+ */
+
+int HKDF(uint8_t *out_key, size_t out_len, const struct env_md_st *digest,
+    const uint8_t *secret, size_t secret_len, const uint8_t *salt,
+    size_t salt_len, const uint8_t *info, size_t info_len);
+
+/*
+ * HKDF_extract computes a HKDF PRK (as specified by RFC 5869) from
+ * initial keying material |secret| and salt |salt| using |digest|,
+ * and outputs |out_len| bytes to |out_key|. The maximum output size
+ * is |EVP_MAX_MD_SIZE|.  It returns one on success and zero on error.
+ */
+int HKDF_extract(uint8_t *out_key, size_t *out_len,
+    const struct env_md_st *digest, const uint8_t *secret,
+    size_t secret_len, const uint8_t *salt, size_t salt_len);
+
+/*
+ * HKDF_expand computes a HKDF OKM (as specified by RFC 5869) of
+ * length |out_len| from the PRK |prk| and info |info| using |digest|,
+ * and outputs the result to |out_key|. It returns one on success and
+ * zero on error.
+ */
+int HKDF_expand(uint8_t *out_key, size_t out_len,
+    const EVP_MD *digest, const uint8_t *prk, size_t prk_len,
+    const uint8_t *info,  size_t info_len);
+
+
+#if defined(__cplusplus)
+}  /* extern C */
+#endif
+
+#endif  /* OPENSSL_HEADER_HKDF_H */
diff --git a/src/regress/lib/libcrypto/Makefile b/src/regress/lib/libcrypto/Makefile
index 46f0949035..73059c1c25 100644
--- a/src/regress/lib/libcrypto/Makefile
+++ b/src/regress/lib/libcrypto/Makefile
@@ -1,4 +1,4 @@
-#       $OpenBSD: Makefile,v 1.27 2017/01/25 06:44:22 beck Exp $
+#       $OpenBSD: Makefile,v 1.28 2017/05/06 20:42:57 beck Exp $
 
 SUBDIR= \
         aead \
@@ -23,6 +23,7 @@ SUBDIR= \
         exp \
         gcm128 \
         gost \
+        hkdf \
         hmac \
         idea \
         ige \
diff --git a/src/regress/lib/libcrypto/hkdf/Makefile b/src/regress/lib/libcrypto/hkdf/Makefile
new file mode 100644
index 0000000000..38d7f5b1f9
--- /dev/null
+++ b/src/regress/lib/libcrypto/hkdf/Makefile
@@ -0,0 +1,9 @@
+#       $OpenBSD: Makefile,v 1.1 2017/05/06 20:42:57 beck Exp $
+
+PROG=   hkdf_test
+LDADD=  -lcrypto
+DPADD=  ${LIBCRYPTO}
+WARNINGS=       Yes
+CFLAGS+=        -DLIBRESSL_INTERNAL
+
+.include <bsd.regress.mk>
diff --git a/src/regress/lib/libcrypto/hkdf/hkdf_test.c b/src/regress/lib/libcrypto/hkdf/hkdf_test.c
new file mode 100644
index 0000000000..3c04262e04
--- /dev/null
+++ b/src/regress/lib/libcrypto/hkdf/hkdf_test.c
@@ -0,0 +1,299 @@
+/* Copyright (c) 2014, Google Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <openssl/crypto.h>
+#include <openssl/evp.h>
+#include <openssl/err.h>
+#include <openssl/hkdf.h>
+
+#define OPENSSL_ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))
+
+typedef struct HKDFTestVector_st {
+        const EVP_MD *(*md_func)(void);
+        const uint8_t ikm[80];
+        const size_t ikm_len;
+        const uint8_t salt[80];
+        const size_t salt_len;
+        const uint8_t info[80];
+        const size_t info_len;
+        const uint8_t prk[EVP_MAX_MD_SIZE];
+        const size_t prk_len;
+        const size_t out_len;
+        const uint8_t out[82];
+} HKDFTestVector;
+
+/* These test vectors are from RFC 5869. */
+static const HKDFTestVector kTests[] = {
+  {
+    EVP_sha256,
+    {
+      0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
+      0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
+    }, 22,
+    {
+      0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
+      0x0c,
+    }, 13,
+    {
+      0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9,
+    }, 10,
+    {
+      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,
+    }, 32,
+    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
+    }
+  },
+  {
+    EVP_sha256,
+    {
+      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
+    }, 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
+    }, 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
+    }, 80,
+    {
+       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,
+    }, 32,
+    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
+    }
+  },
+  {
+    EVP_sha256,
+    {
+      0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
+      0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
+    }, 22,
+    {
+       0,
+    }, 0,
+    {
+       0,
+    }, 0,
+    {
+      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
+    }, 32,
+    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
+    }
+  },
+  {
+    EVP_sha1,
+    {
+      0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
+    }, 11,
+    {
+      0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
+      0x0c,
+    }, 13,
+    {
+      0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9,
+    }, 10,
+    {
+      0x9b, 0x6c, 0x18, 0xc4, 0x32, 0xa7, 0xbf, 0x8f, 0x0e, 0x71, 0xc8, 0xeb,
+      0x88, 0xf4, 0xb3, 0x0b, 0xaa, 0x2b, 0xa2, 0x43
+    }, 20,
+    42, {
+      0x08, 0x5a, 0x01, 0xea, 0x1b, 0x10, 0xf3, 0x69, 0x33, 0x06, 0x8b, 0x56,
+      0xef, 0xa5, 0xad, 0x81, 0xa4, 0xf1, 0x4b, 0x82, 0x2f, 0x5b, 0x09, 0x15,
+      0x68, 0xa9, 0xcd, 0xd4, 0xf1, 0x55, 0xfd, 0xa2, 0xc2, 0x2e, 0x42, 0x24,
+      0x78, 0xd3, 0x05, 0xf3, 0xf8, 0x96
+    }
+  },
+  {
+    EVP_sha1,
+    {
+      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
+    }, 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
+    }, 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
+    }, 80,
+    {
+      0x8a, 0xda, 0xe0, 0x9a, 0x2a, 0x30, 0x70, 0x59, 0x47, 0x8d, 0x30, 0x9b,
+      0x26, 0xc4, 0x11, 0x5a, 0x22, 0x4c, 0xfa, 0xf6,
+    }, 20,
+    82, {
+      0x0b, 0xd7, 0x70, 0xa7, 0x4d, 0x11, 0x60, 0xf7, 0xc9, 0xf1, 0x2c, 0xd5,
+      0x91, 0x2a, 0x06, 0xeb, 0xff, 0x6a, 0xdc, 0xae, 0x89, 0x9d, 0x92, 0x19,
+      0x1f, 0xe4, 0x30, 0x56, 0x73, 0xba, 0x2f, 0xfe, 0x8f, 0xa3, 0xf1, 0xa4,
+      0xe5, 0xad, 0x79, 0xf3, 0xf3, 0x34, 0xb3, 0xb2, 0x02, 0xb2, 0x17, 0x3c,
+      0x48, 0x6e, 0xa3, 0x7c, 0xe3, 0xd3, 0x97, 0xed, 0x03, 0x4c, 0x7f, 0x9d,
+      0xfe, 0xb1, 0x5c, 0x5e, 0x92, 0x73, 0x36, 0xd0, 0x44, 0x1f, 0x4c, 0x43,
+      0x00, 0xe2, 0xcf, 0xf0, 0xd0, 0x90, 0x0b, 0x52, 0xd3, 0xb4
+    }
+  },
+  {
+    EVP_sha1,
+    {
+      0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
+      0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
+    }, 22,
+    {
+       0,
+    }, 0,
+    {
+       0,
+    }, 0,
+    {
+      0xda, 0x8c, 0x8a, 0x73, 0xc7, 0xfa, 0x77, 0x28, 0x8e, 0xc6, 0xf5, 0xe7,
+      0xc2, 0x97, 0x78, 0x6a, 0xa0, 0xd3, 0x2d, 0x01,
+    }, 20,
+    42, {
+      0x0a, 0xc1, 0xaf, 0x70, 0x02, 0xb3, 0xd7, 0x61, 0xd1, 0xe5, 0x52, 0x98,
+      0xda, 0x9d, 0x05, 0x06, 0xb9, 0xae, 0x52, 0x05, 0x72, 0x20, 0xa3, 0x06,
+      0xe0, 0x7b, 0x6b, 0x87, 0xe8, 0xdf, 0x21, 0xd0, 0xea, 0x00, 0x03, 0x3d,
+      0xe0, 0x39, 0x84, 0xd3, 0x49, 0x18
+    }
+  },
+  {
+    EVP_sha1,
+    {
+      0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c,
+      0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c,
+    }, 22,
+    {
+       0,
+    }, 0,
+    {
+       0,
+    }, 0,
+    {
+      0x2a, 0xdc, 0xca, 0xda, 0x18, 0x77, 0x9e, 0x7c, 0x20, 0x77, 0xad, 0x2e,
+      0xb1, 0x9d, 0x3f, 0x3e, 0x73, 0x13, 0x85, 0xdd,
+    }, 20,
+    42, {
+      0x2c, 0x91, 0x11, 0x72, 0x04, 0xd7, 0x45, 0xf3, 0x50, 0x0d, 0x63, 0x6a,
+      0x62, 0xf6, 0x4f, 0x0a, 0xb3, 0xba, 0xe5, 0x48, 0xaa, 0x53, 0xd4, 0x23,
+      0xb0, 0xd1, 0xf2, 0x7e, 0xbb, 0xa6, 0xf5, 0xe5, 0x67, 0x3a, 0x08, 0x1d,
+      0x70, 0xcc, 0xe7, 0xac, 0xfc, 0x48
+    }
+  },
+};
+
+int main(void) {
+        size_t i;
+        OPENSSL_add_all_algorithms_noconf();
+
+        for (i = 0; i < OPENSSL_ARRAY_SIZE(kTests); i++) {
+                const HKDFTestVector *test = &kTests[i];
+                uint8_t prk[EVP_MAX_MD_SIZE];
+                uint8_t buf[82];
+                size_t prk_len;
+                if (!HKDF_extract(prk, &prk_len, test->md_func(), test->ikm,
+                    test->ikm_len, test->salt, test->salt_len)) {
+                        fprintf(stderr, "Call to HKDF_extract failed\n");
+                        ERR_print_errors_fp(stderr);
+                        return 1;
+                }
+                if (prk_len != test->prk_len ||
+                    memcmp(prk, test->prk, test->prk_len) != 0) {
+                        fprintf(stderr, "%zu: Resulting PRK does not match"
+                            "test vector\n", i);
+                        return 1;
+                }
+                if (!HKDF_expand(buf, test->out_len, test->md_func(), prk, prk_len,
+                    test->info, test->info_len)) {
+                        fprintf(stderr, "Call to HKDF_expand failed\n");
+                        ERR_print_errors_fp(stderr);
+                        return 1;
+                }
+                if (memcmp(buf, test->out, test->out_len) != 0) {
+                        fprintf(stderr,
+                            "%zu: Resulting key material does not match test"
+                            "vector\n", i);
+                        return 1;
+                }
+
+                if (!HKDF(buf, test->out_len, test->md_func(), test->ikm,
+                    test->ikm_len, test->salt, test->salt_len, test->info,
+                    test->info_len)) {
+                        fprintf(stderr, "Call to HKDF failed\n");
+                        ERR_print_errors_fp(stderr);
+                        return 1;
+                }
+                if (memcmp(buf, test->out, test->out_len) != 0) {
+                        fprintf(stderr,
+                            "%zu: Resulting key material does not match test"
+                            "vector\n", i);
+                        return 1;
+                }
+        }
+
+        printf("PASS\n");
+        return 0;
+}