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-rw-r--r--src/crypto/CMakeLists.txt2
-rw-r--r--src/crypto/hmac-keccak.c81
-rw-r--r--src/crypto/hmac-keccak.h59
3 files changed, 142 insertions, 0 deletions
diff --git a/src/crypto/CMakeLists.txt b/src/crypto/CMakeLists.txt
index 6e774b8d5..0d949b968 100644
--- a/src/crypto/CMakeLists.txt
+++ b/src/crypto/CMakeLists.txt
@@ -39,6 +39,7 @@ set(crypto_sources
hash-extra-jh.c
hash-extra-skein.c
hash.c
+ hmac-keccak.c
jh.c
keccak.c
oaes_lib.c
@@ -64,6 +65,7 @@ set(crypto_private_headers
groestl_tables.h
hash-ops.h
hash.h
+ hmac-keccak.h
initializer.h
jh.h
keccak.h
diff --git a/src/crypto/hmac-keccak.c b/src/crypto/hmac-keccak.c
new file mode 100644
index 000000000..edcb2065e
--- /dev/null
+++ b/src/crypto/hmac-keccak.c
@@ -0,0 +1,81 @@
+// Copyright (c) 2014-2018, The Monero Project
+//
+// 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 "hmac-keccak.h"
+#include "memwipe.h"
+
+#define KECCAK_BLOCKLEN 136
+#define HASH_SIZE 32
+
+void hmac_keccak_init(hmac_keccak_state *S, const uint8_t *_key, size_t keylen) {
+ const uint8_t *key = _key;
+ uint8_t keyhash[HASH_SIZE];
+ uint8_t pad[KECCAK_BLOCKLEN];
+ uint64_t i;
+
+ if (keylen > KECCAK_BLOCKLEN) {
+ keccak(key, keylen, keyhash, HASH_SIZE);
+ key = keyhash;
+ keylen = HASH_SIZE;
+ }
+
+ keccak_init(&S->inner);
+ memset(pad, 0x36, KECCAK_BLOCKLEN);
+ for (i = 0; i < keylen; ++i) {
+ pad[i] ^= key[i];
+ }
+ keccak_update(&S->inner, pad, KECCAK_BLOCKLEN);
+
+ keccak_init(&S->outer);
+ memset(pad, 0x5c, KECCAK_BLOCKLEN);
+ for (i = 0; i < keylen; ++i) {
+ pad[i] ^= key[i];
+ }
+ keccak_update(&S->outer, pad, KECCAK_BLOCKLEN);
+
+ memwipe(keyhash, HASH_SIZE);
+}
+
+void hmac_keccak_update(hmac_keccak_state *S, const uint8_t *data, size_t datalen) {
+ keccak_update(&S->inner, data, datalen);
+}
+
+void hmac_keccak_finish(hmac_keccak_state *S, uint8_t *digest) {
+ uint8_t ihash[HASH_SIZE];
+ keccak_finish(&S->inner, ihash);
+ keccak_update(&S->outer, ihash, HASH_SIZE);
+ keccak_finish(&S->outer, digest);
+ memwipe(ihash, HASH_SIZE);
+}
+
+void hmac_keccak_hash(uint8_t *out, const uint8_t *key, size_t keylen, const uint8_t *in, size_t inlen) {
+ hmac_keccak_state S;
+ hmac_keccak_init(&S, key, keylen);
+ hmac_keccak_update(&S, in, inlen);
+ hmac_keccak_finish(&S, out);
+}
diff --git a/src/crypto/hmac-keccak.h b/src/crypto/hmac-keccak.h
new file mode 100644
index 000000000..c450860d4
--- /dev/null
+++ b/src/crypto/hmac-keccak.h
@@ -0,0 +1,59 @@
+// Copyright (c) 2014-2018, The Monero Project
+//
+// 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.
+
+#ifndef HMAC_KECCAK_H
+#define HMAC_KECCAK_H
+
+#include "keccak.h"
+
+// HMAC RFC 2104 with Keccak-256 base hash function
+//
+// B = KECCAK_BLOCKLEN = 136 B
+// L = HASH_SIZE = 32 B
+//
+// Note this is not HMAC-SHA3 as SHA3 and Keccak differs in
+// the padding constant.
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+ KECCAK_CTX inner;
+ KECCAK_CTX outer;
+} hmac_keccak_state;
+
+void hmac_keccak_init(hmac_keccak_state *S, const uint8_t *_key, size_t keylen);
+void hmac_keccak_update(hmac_keccak_state *S, const uint8_t *data, size_t datalen);
+void hmac_keccak_finish(hmac_keccak_state *S, uint8_t *digest);
+void hmac_keccak_hash(uint8_t *out, const uint8_t *key, size_t keylen, const uint8_t *in, size_t inlen);
+
+#ifdef __cplusplus
+}
+#endif
+#endif //HMAC_KECCAK_H