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
diff --git a/tests/unit_tests/CMakeLists.txt b/tests/unit_tests/CMakeLists.txt
index aea82ede2..cd324b5d3 100644
--- a/tests/unit_tests/CMakeLists.txt
+++ b/tests/unit_tests/CMakeLists.txt
@@ -52,6 +52,7 @@ set(unit_tests_sources
   json_serialization.cpp
   get_xtype_from_string.cpp
   hashchain.cpp
+  hmac_keccak.cpp
   http.cpp
   keccak.cpp
   logging.cpp
diff --git a/tests/unit_tests/hmac_keccak.cpp b/tests/unit_tests/hmac_keccak.cpp
new file mode 100644
index 000000000..cb35d272a
--- /dev/null
+++ b/tests/unit_tests/hmac_keccak.cpp
@@ -0,0 +1,152 @@
+// Copyright (c) 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 "gtest/gtest.h"
+#include "../io.h"
+
+extern "C" {
+#include "crypto/hmac-keccak.h"
+}
+
+#define KECCAK_BLOCKLEN 136
+
+static const struct {
+  const char *key;
+  const char *inp;
+  const char *res;
+} keccak_hmac_vectors[] = {
+    {"",
+     "",
+     "042186ec4e98680a0866091d6fb89b60871134b44327f8f467c14e9841d3e97b",
+    },
+    {"00",
+     "",
+     "042186ec4e98680a0866091d6fb89b60871134b44327f8f467c14e9841d3e97b",
+    },
+    {"00000000000000000000000000000000",
+     "",
+     "042186ec4e98680a0866091d6fb89b60871134b44327f8f467c14e9841d3e97b",
+    },
+    {"",
+     "00",
+     "402541d5d678ad30217023a12efbd2f367388dc0253ccddb8f915d187e03d414",
+    },
+    {"0000000000000000000000000000000000000000000000000000000000000000",
+     "0000000000000000000000000000000000000000000000000000000000000000",
+     "d164c38ca454176281b3c09dc83cf70bd00290835ff5490356993d368cde0577",
+    },
+    {"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
+     "0000000000000000000000000000000000000000000000000000000000000000",
+     "d52c9100301a9546d8c97d7f32e8178fd5f4b0a7646ab761db9e0f503f8b0542",
+    },
+    {"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
+     "d52c9100301a9546d8c97d7f32e8178fd5f4b0a7646ab761db9e0f503f8b0542",
+     "5b9d98c5d3249176230d70fdb215ee2f93e4783064c9564384ddc396e63c18cb",
+    },
+    {"00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+     "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+     "98d033ba0c95bb3aaf5709733443cbedba20f6451b710ccba4118fc5523013c8",
+    },
+    {"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",
+     "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",
+     "117b60a7f474fd2245adff82a69429367de8f5263fa96c411986009a743b0e70",
+    },
+    {"00112233445566778899aabbccddeeff102132435465768798a9bacbdcedfe0f",
+     "000d1a2734414e5b6875828f9ca9b6c3d0ddeaf704111e2b3845525f6c798693a0adbac7d4e1eefb0815222f3c495663707d8a97a4b1becbd8e5f2ff0c192633404d5a6774818e9ba8b5c2cfdce9f603101d2a3744515e6b7885929facb9c6d3e0edfa0714212e3b4855626f7c8996a3b0bdcad7e4f1fe0b1825323f4c596673808d9aa7b4c1cedbe8f5020f1c293643505d6a7784919eabb8c5d2dfecf90613202d3a4754616e7b8895a2afbcc9d6e3f0fd0a1724313e4b5865727f8c99a6b3c0cddae7f4010e1b",
+     "cbe3ca627c6432c9a66f07c6411fccca894c9b083b55d0773152460142a676ed",
+    },
+};
+
+static void test_keccak_hmac(const size_t * chunks)
+{
+  uint8_t inp_buff[1024];
+  uint8_t key_buff[1024];
+  uint8_t res_exp[32];
+  uint8_t res_comp[32];
+  const size_t len_chunks = chunks ? sizeof(chunks) / sizeof(*chunks) : 0;
+
+  for (size_t i = 0; i < (sizeof(keccak_hmac_vectors) / sizeof(*keccak_hmac_vectors)); i++)
+  {
+    const size_t inp_len = strlen(keccak_hmac_vectors[i].inp)/2;
+    const size_t key_len = strlen(keccak_hmac_vectors[i].key)/2;
+    ASSERT_TRUE(hexdecode(keccak_hmac_vectors[i].inp, inp_len, inp_buff));
+    ASSERT_TRUE(hexdecode(keccak_hmac_vectors[i].key, key_len, key_buff));
+    ASSERT_TRUE(hexdecode(keccak_hmac_vectors[i].res, 32, res_exp));
+    if (len_chunks == 0)
+    {
+      hmac_keccak_hash(res_comp, key_buff, key_len, inp_buff, inp_len);
+    }
+    else
+    {
+      hmac_keccak_state S;
+      hmac_keccak_init(&S, key_buff, key_len);
+      size_t inp_passed = 0;
+      size_t chunk_size = 0;
+      while(inp_passed < inp_len){
+        const size_t to_pass = std::min(inp_len - inp_passed, chunks[chunk_size]);
+        hmac_keccak_update(&S, inp_buff + inp_passed, to_pass);
+
+        inp_passed += to_pass;
+        chunk_size = (chunk_size + 1) % len_chunks;
+      }
+
+      hmac_keccak_finish(&S, res_comp);
+    }
+    ASSERT_EQ(memcmp(res_exp, res_comp, 32), 0);
+  }
+}
+
+
+TEST(keccak_hmac, )
+{
+  test_keccak_hmac({});
+}
+
+TEST(keccak_hmac, 1)
+{
+  static const size_t chunks[] = {1};
+  test_keccak_hmac(chunks);
+}
+
+TEST(keccak_hmac, 1_20)
+{
+  static const size_t chunks[] = {1, 20};
+  test_keccak_hmac(chunks);
+}
+
+TEST(keccak_hmac, 136_1)
+{
+  static const size_t chunks[] = {136, 1};
+  test_keccak_hmac(chunks);
+}
+
+TEST(keccak_hmac, 137_1)
+{
+  static const size_t chunks[] = {137, 1};
+  test_keccak_hmac(chunks);
+}