X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=internal%2Fgost34112012%2Fhash.go;fp=internal%2Fgost34112012%2Fhash.go;h=5f6b707d87a05a001326d464693406e10aa60672;hb=c07494bbd559b9d00f391e28cfd070e18afe9900;hp=0000000000000000000000000000000000000000;hpb=107600dede989f0cc479b5a72c5f97e174307154;p=gogost.git

diff --git a/internal/gost34112012/hash.go b/internal/gost34112012/hash.go
new file mode 100644
index 0000000..5f6b707
--- /dev/null
+++ b/internal/gost34112012/hash.go
@@ -0,0 +1,448 @@
+// GoGOST -- Pure Go GOST cryptographic functions library
+// Copyright (C) 2015-2019 Sergey Matveev <stargrave@stargrave.org>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 3 of the License.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+// GOST R 34.11-2012 hash function.
+// RFC 6986.
+package gost34112012
+
+import (
+	"bytes"
+	"encoding/binary"
+	"errors"
+)
+
+const (
+	BlockSize = 64
+
+	MarshaledName = "STREEBOG"
+)
+
+var (
+	pi [256]byte = [256]byte{
+		0xfc, 0xee, 0xdd, 0x11, 0xcf, 0x6e, 0x31, 0x16,
+		0xfb, 0xc4, 0xfa, 0xda, 0x23, 0xc5, 0x04, 0x4d,
+		0xe9, 0x77, 0xf0, 0xdb, 0x93, 0x2e, 0x99, 0xba,
+		0x17, 0x36, 0xf1, 0xbb, 0x14, 0xcd, 0x5f, 0xc1,
+		0xf9, 0x18, 0x65, 0x5a, 0xe2, 0x5c, 0xef, 0x21,
+		0x81, 0x1c, 0x3c, 0x42, 0x8b, 0x01, 0x8e, 0x4f,
+		0x05, 0x84, 0x02, 0xae, 0xe3, 0x6a, 0x8f, 0xa0,
+		0x06, 0x0b, 0xed, 0x98, 0x7f, 0xd4, 0xd3, 0x1f,
+		0xeb, 0x34, 0x2c, 0x51, 0xea, 0xc8, 0x48, 0xab,
+		0xf2, 0x2a, 0x68, 0xa2, 0xfd, 0x3a, 0xce, 0xcc,
+		0xb5, 0x70, 0x0e, 0x56, 0x08, 0x0c, 0x76, 0x12,
+		0xbf, 0x72, 0x13, 0x47, 0x9c, 0xb7, 0x5d, 0x87,
+		0x15, 0xa1, 0x96, 0x29, 0x10, 0x7b, 0x9a, 0xc7,
+		0xf3, 0x91, 0x78, 0x6f, 0x9d, 0x9e, 0xb2, 0xb1,
+		0x32, 0x75, 0x19, 0x3d, 0xff, 0x35, 0x8a, 0x7e,
+		0x6d, 0x54, 0xc6, 0x80, 0xc3, 0xbd, 0x0d, 0x57,
+		0xdf, 0xf5, 0x24, 0xa9, 0x3e, 0xa8, 0x43, 0xc9,
+		0xd7, 0x79, 0xd6, 0xf6, 0x7c, 0x22, 0xb9, 0x03,
+		0xe0, 0x0f, 0xec, 0xde, 0x7a, 0x94, 0xb0, 0xbc,
+		0xdc, 0xe8, 0x28, 0x50, 0x4e, 0x33, 0x0a, 0x4a,
+		0xa7, 0x97, 0x60, 0x73, 0x1e, 0x00, 0x62, 0x44,
+		0x1a, 0xb8, 0x38, 0x82, 0x64, 0x9f, 0x26, 0x41,
+		0xad, 0x45, 0x46, 0x92, 0x27, 0x5e, 0x55, 0x2f,
+		0x8c, 0xa3, 0xa5, 0x7d, 0x69, 0xd5, 0x95, 0x3b,
+		0x07, 0x58, 0xb3, 0x40, 0x86, 0xac, 0x1d, 0xf7,
+		0x30, 0x37, 0x6b, 0xe4, 0x88, 0xd9, 0xe7, 0x89,
+		0xe1, 0x1b, 0x83, 0x49, 0x4c, 0x3f, 0xf8, 0xfe,
+		0x8d, 0x53, 0xaa, 0x90, 0xca, 0xd8, 0x85, 0x61,
+		0x20, 0x71, 0x67, 0xa4, 0x2d, 0x2b, 0x09, 0x5b,
+		0xcb, 0x9b, 0x25, 0xd0, 0xbe, 0xe5, 0x6c, 0x52,
+		0x59, 0xa6, 0x74, 0xd2, 0xe6, 0xf4, 0xb4, 0xc0,
+		0xd1, 0x66, 0xaf, 0xc2, 0x39, 0x4b, 0x63, 0xb6,
+	}
+	tau [64]int = [64]int{
+		0x00, 0x08, 0x10, 0x18, 0x20, 0x28, 0x30, 0x38,
+		0x01, 0x09, 0x11, 0x19, 0x21, 0x29, 0x31, 0x39,
+		0x02, 0x0a, 0x12, 0x1a, 0x22, 0x2a, 0x32, 0x3a,
+		0x03, 0x0b, 0x13, 0x1b, 0x23, 0x2b, 0x33, 0x3b,
+		0x04, 0x0c, 0x14, 0x1c, 0x24, 0x2c, 0x34, 0x3c,
+		0x05, 0x0d, 0x15, 0x1d, 0x25, 0x2d, 0x35, 0x3d,
+		0x06, 0x0e, 0x16, 0x1e, 0x26, 0x2e, 0x36, 0x3e,
+		0x07, 0x0f, 0x17, 0x1f, 0x27, 0x2f, 0x37, 0x3f,
+	}
+	c [12][BlockSize]byte = [12][BlockSize]byte{
+		[BlockSize]byte{
+			0x07, 0x45, 0xa6, 0xf2, 0x59, 0x65, 0x80, 0xdd,
+			0x23, 0x4d, 0x74, 0xcc, 0x36, 0x74, 0x76, 0x05,
+			0x15, 0xd3, 0x60, 0xa4, 0x08, 0x2a, 0x42, 0xa2,
+			0x01, 0x69, 0x67, 0x92, 0x91, 0xe0, 0x7c, 0x4b,
+			0xfc, 0xc4, 0x85, 0x75, 0x8d, 0xb8, 0x4e, 0x71,
+			0x16, 0xd0, 0x45, 0x2e, 0x43, 0x76, 0x6a, 0x2f,
+			0x1f, 0x7c, 0x65, 0xc0, 0x81, 0x2f, 0xcb, 0xeb,
+			0xe9, 0xda, 0xca, 0x1e, 0xda, 0x5b, 0x08, 0xb1,
+		},
+		[BlockSize]byte{
+			0xb7, 0x9b, 0xb1, 0x21, 0x70, 0x04, 0x79, 0xe6,
+			0x56, 0xcd, 0xcb, 0xd7, 0x1b, 0xa2, 0xdd, 0x55,
+			0xca, 0xa7, 0x0a, 0xdb, 0xc2, 0x61, 0xb5, 0x5c,
+			0x58, 0x99, 0xd6, 0x12, 0x6b, 0x17, 0xb5, 0x9a,
+			0x31, 0x01, 0xb5, 0x16, 0x0f, 0x5e, 0xd5, 0x61,
+			0x98, 0x2b, 0x23, 0x0a, 0x72, 0xea, 0xfe, 0xf3,
+			0xd7, 0xb5, 0x70, 0x0f, 0x46, 0x9d, 0xe3, 0x4f,
+			0x1a, 0x2f, 0x9d, 0xa9, 0x8a, 0xb5, 0xa3, 0x6f,
+		},
+		[BlockSize]byte{
+			0xb2, 0x0a, 0xba, 0x0a, 0xf5, 0x96, 0x1e, 0x99,
+			0x31, 0xdb, 0x7a, 0x86, 0x43, 0xf4, 0xb6, 0xc2,
+			0x09, 0xdb, 0x62, 0x60, 0x37, 0x3a, 0xc9, 0xc1,
+			0xb1, 0x9e, 0x35, 0x90, 0xe4, 0x0f, 0xe2, 0xd3,
+			0x7b, 0x7b, 0x29, 0xb1, 0x14, 0x75, 0xea, 0xf2,
+			0x8b, 0x1f, 0x9c, 0x52, 0x5f, 0x5e, 0xf1, 0x06,
+			0x35, 0x84, 0x3d, 0x6a, 0x28, 0xfc, 0x39, 0x0a,
+			0xc7, 0x2f, 0xce, 0x2b, 0xac, 0xdc, 0x74, 0xf5,
+		},
+		[BlockSize]byte{
+			0x2e, 0xd1, 0xe3, 0x84, 0xbc, 0xbe, 0x0c, 0x22,
+			0xf1, 0x37, 0xe8, 0x93, 0xa1, 0xea, 0x53, 0x34,
+			0xbe, 0x03, 0x52, 0x93, 0x33, 0x13, 0xb7, 0xd8,
+			0x75, 0xd6, 0x03, 0xed, 0x82, 0x2c, 0xd7, 0xa9,
+			0x3f, 0x35, 0x5e, 0x68, 0xad, 0x1c, 0x72, 0x9d,
+			0x7d, 0x3c, 0x5c, 0x33, 0x7e, 0x85, 0x8e, 0x48,
+			0xdd, 0xe4, 0x71, 0x5d, 0xa0, 0xe1, 0x48, 0xf9,
+			0xd2, 0x66, 0x15, 0xe8, 0xb3, 0xdf, 0x1f, 0xef,
+		},
+		[BlockSize]byte{
+			0x57, 0xfe, 0x6c, 0x7c, 0xfd, 0x58, 0x17, 0x60,
+			0xf5, 0x63, 0xea, 0xa9, 0x7e, 0xa2, 0x56, 0x7a,
+			0x16, 0x1a, 0x27, 0x23, 0xb7, 0x00, 0xff, 0xdf,
+			0xa3, 0xf5, 0x3a, 0x25, 0x47, 0x17, 0xcd, 0xbf,
+			0xbd, 0xff, 0x0f, 0x80, 0xd7, 0x35, 0x9e, 0x35,
+			0x4a, 0x10, 0x86, 0x16, 0x1f, 0x1c, 0x15, 0x7f,
+			0x63, 0x23, 0xa9, 0x6c, 0x0c, 0x41, 0x3f, 0x9a,
+			0x99, 0x47, 0x47, 0xad, 0xac, 0x6b, 0xea, 0x4b,
+		},
+		[BlockSize]byte{
+			0x6e, 0x7d, 0x64, 0x46, 0x7a, 0x40, 0x68, 0xfa,
+			0x35, 0x4f, 0x90, 0x36, 0x72, 0xc5, 0x71, 0xbf,
+			0xb6, 0xc6, 0xbe, 0xc2, 0x66, 0x1f, 0xf2, 0x0a,
+			0xb4, 0xb7, 0x9a, 0x1c, 0xb7, 0xa6, 0xfa, 0xcf,
+			0xc6, 0x8e, 0xf0, 0x9a, 0xb4, 0x9a, 0x7f, 0x18,
+			0x6c, 0xa4, 0x42, 0x51, 0xf9, 0xc4, 0x66, 0x2d,
+			0xc0, 0x39, 0x30, 0x7a, 0x3b, 0xc3, 0xa4, 0x6f,
+			0xd9, 0xd3, 0x3a, 0x1d, 0xae, 0xae, 0x4f, 0xae,
+		},
+		[BlockSize]byte{
+			0x93, 0xd4, 0x14, 0x3a, 0x4d, 0x56, 0x86, 0x88,
+			0xf3, 0x4a, 0x3c, 0xa2, 0x4c, 0x45, 0x17, 0x35,
+			0x04, 0x05, 0x4a, 0x28, 0x83, 0x69, 0x47, 0x06,
+			0x37, 0x2c, 0x82, 0x2d, 0xc5, 0xab, 0x92, 0x09,
+			0xc9, 0x93, 0x7a, 0x19, 0x33, 0x3e, 0x47, 0xd3,
+			0xc9, 0x87, 0xbf, 0xe6, 0xc7, 0xc6, 0x9e, 0x39,
+			0x54, 0x09, 0x24, 0xbf, 0xfe, 0x86, 0xac, 0x51,
+			0xec, 0xc5, 0xaa, 0xee, 0x16, 0x0e, 0xc7, 0xf4,
+		},
+		[BlockSize]byte{
+			0x1e, 0xe7, 0x02, 0xbf, 0xd4, 0x0d, 0x7f, 0xa4,
+			0xd9, 0xa8, 0x51, 0x59, 0x35, 0xc2, 0xac, 0x36,
+			0x2f, 0xc4, 0xa5, 0xd1, 0x2b, 0x8d, 0xd1, 0x69,
+			0x90, 0x06, 0x9b, 0x92, 0xcb, 0x2b, 0x89, 0xf4,
+			0x9a, 0xc4, 0xdb, 0x4d, 0x3b, 0x44, 0xb4, 0x89,
+			0x1e, 0xde, 0x36, 0x9c, 0x71, 0xf8, 0xb7, 0x4e,
+			0x41, 0x41, 0x6e, 0x0c, 0x02, 0xaa, 0xe7, 0x03,
+			0xa7, 0xc9, 0x93, 0x4d, 0x42, 0x5b, 0x1f, 0x9b,
+		},
+		[BlockSize]byte{
+			0xdb, 0x5a, 0x23, 0x83, 0x51, 0x44, 0x61, 0x72,
+			0x60, 0x2a, 0x1f, 0xcb, 0x92, 0xdc, 0x38, 0x0e,
+			0x54, 0x9c, 0x07, 0xa6, 0x9a, 0x8a, 0x2b, 0x7b,
+			0xb1, 0xce, 0xb2, 0xdb, 0x0b, 0x44, 0x0a, 0x80,
+			0x84, 0x09, 0x0d, 0xe0, 0xb7, 0x55, 0xd9, 0x3c,
+			0x24, 0x42, 0x89, 0x25, 0x1b, 0x3a, 0x7d, 0x3a,
+			0xde, 0x5f, 0x16, 0xec, 0xd8, 0x9a, 0x4c, 0x94,
+			0x9b, 0x22, 0x31, 0x16, 0x54, 0x5a, 0x8f, 0x37,
+		},
+		[BlockSize]byte{
+			0xed, 0x9c, 0x45, 0x98, 0xfb, 0xc7, 0xb4, 0x74,
+			0xc3, 0xb6, 0x3b, 0x15, 0xd1, 0xfa, 0x98, 0x36,
+			0xf4, 0x52, 0x76, 0x3b, 0x30, 0x6c, 0x1e, 0x7a,
+			0x4b, 0x33, 0x69, 0xaf, 0x02, 0x67, 0xe7, 0x9f,
+			0x03, 0x61, 0x33, 0x1b, 0x8a, 0xe1, 0xff, 0x1f,
+			0xdb, 0x78, 0x8a, 0xff, 0x1c, 0xe7, 0x41, 0x89,
+			0xf3, 0xf3, 0xe4, 0xb2, 0x48, 0xe5, 0x2a, 0x38,
+			0x52, 0x6f, 0x05, 0x80, 0xa6, 0xde, 0xbe, 0xab,
+		},
+		[BlockSize]byte{
+			0x1b, 0x2d, 0xf3, 0x81, 0xcd, 0xa4, 0xca, 0x6b,
+			0x5d, 0xd8, 0x6f, 0xc0, 0x4a, 0x59, 0xa2, 0xde,
+			0x98, 0x6e, 0x47, 0x7d, 0x1d, 0xcd, 0xba, 0xef,
+			0xca, 0xb9, 0x48, 0xea, 0xef, 0x71, 0x1d, 0x8a,
+			0x79, 0x66, 0x84, 0x14, 0x21, 0x80, 0x01, 0x20,
+			0x61, 0x07, 0xab, 0xeb, 0xbb, 0x6b, 0xfa, 0xd8,
+			0x94, 0xfe, 0x5a, 0x63, 0xcd, 0xc6, 0x02, 0x30,
+			0xfb, 0x89, 0xc8, 0xef, 0xd0, 0x9e, 0xcd, 0x7b,
+		},
+		[BlockSize]byte{
+			0x20, 0xd7, 0x1b, 0xf1, 0x4a, 0x92, 0xbc, 0x48,
+			0x99, 0x1b, 0xb2, 0xd9, 0xd5, 0x17, 0xf4, 0xfa,
+			0x52, 0x28, 0xe1, 0x88, 0xaa, 0xa4, 0x1d, 0xe7,
+			0x86, 0xcc, 0x91, 0x18, 0x9d, 0xef, 0x80, 0x5d,
+			0x9b, 0x9f, 0x21, 0x30, 0xd4, 0x12, 0x20, 0xf8,
+			0x77, 0x1d, 0xdf, 0xbc, 0x32, 0x3c, 0xa4, 0xcd,
+			0x7a, 0xb1, 0x49, 0x04, 0xb0, 0x80, 0x13, 0xd2,
+			0xba, 0x31, 0x16, 0xf1, 0x67, 0xe7, 0x8e, 0x37,
+		},
+	}
+	a [64]uint64 // It is filled in init()
+)
+
+func init() {
+	as := [64][]byte{
+		[]byte{0x8e, 0x20, 0xfa, 0xa7, 0x2b, 0xa0, 0xb4, 0x70},
+		[]byte{0x47, 0x10, 0x7d, 0xdd, 0x9b, 0x50, 0x5a, 0x38},
+		[]byte{0xad, 0x08, 0xb0, 0xe0, 0xc3, 0x28, 0x2d, 0x1c},
+		[]byte{0xd8, 0x04, 0x58, 0x70, 0xef, 0x14, 0x98, 0x0e},
+		[]byte{0x6c, 0x02, 0x2c, 0x38, 0xf9, 0x0a, 0x4c, 0x07},
+		[]byte{0x36, 0x01, 0x16, 0x1c, 0xf2, 0x05, 0x26, 0x8d},
+		[]byte{0x1b, 0x8e, 0x0b, 0x0e, 0x79, 0x8c, 0x13, 0xc8},
+		[]byte{0x83, 0x47, 0x8b, 0x07, 0xb2, 0x46, 0x87, 0x64},
+		[]byte{0xa0, 0x11, 0xd3, 0x80, 0x81, 0x8e, 0x8f, 0x40},
+		[]byte{0x50, 0x86, 0xe7, 0x40, 0xce, 0x47, 0xc9, 0x20},
+		[]byte{0x28, 0x43, 0xfd, 0x20, 0x67, 0xad, 0xea, 0x10},
+		[]byte{0x14, 0xaf, 0xf0, 0x10, 0xbd, 0xd8, 0x75, 0x08},
+		[]byte{0x0a, 0xd9, 0x78, 0x08, 0xd0, 0x6c, 0xb4, 0x04},
+		[]byte{0x05, 0xe2, 0x3c, 0x04, 0x68, 0x36, 0x5a, 0x02},
+		[]byte{0x8c, 0x71, 0x1e, 0x02, 0x34, 0x1b, 0x2d, 0x01},
+		[]byte{0x46, 0xb6, 0x0f, 0x01, 0x1a, 0x83, 0x98, 0x8e},
+		[]byte{0x90, 0xda, 0xb5, 0x2a, 0x38, 0x7a, 0xe7, 0x6f},
+		[]byte{0x48, 0x6d, 0xd4, 0x15, 0x1c, 0x3d, 0xfd, 0xb9},
+		[]byte{0x24, 0xb8, 0x6a, 0x84, 0x0e, 0x90, 0xf0, 0xd2},
+		[]byte{0x12, 0x5c, 0x35, 0x42, 0x07, 0x48, 0x78, 0x69},
+		[]byte{0x09, 0x2e, 0x94, 0x21, 0x8d, 0x24, 0x3c, 0xba},
+		[]byte{0x8a, 0x17, 0x4a, 0x9e, 0xc8, 0x12, 0x1e, 0x5d},
+		[]byte{0x45, 0x85, 0x25, 0x4f, 0x64, 0x09, 0x0f, 0xa0},
+		[]byte{0xac, 0xcc, 0x9c, 0xa9, 0x32, 0x8a, 0x89, 0x50},
+		[]byte{0x9d, 0x4d, 0xf0, 0x5d, 0x5f, 0x66, 0x14, 0x51},
+		[]byte{0xc0, 0xa8, 0x78, 0xa0, 0xa1, 0x33, 0x0a, 0xa6},
+		[]byte{0x60, 0x54, 0x3c, 0x50, 0xde, 0x97, 0x05, 0x53},
+		[]byte{0x30, 0x2a, 0x1e, 0x28, 0x6f, 0xc5, 0x8c, 0xa7},
+		[]byte{0x18, 0x15, 0x0f, 0x14, 0xb9, 0xec, 0x46, 0xdd},
+		[]byte{0x0c, 0x84, 0x89, 0x0a, 0xd2, 0x76, 0x23, 0xe0},
+		[]byte{0x06, 0x42, 0xca, 0x05, 0x69, 0x3b, 0x9f, 0x70},
+		[]byte{0x03, 0x21, 0x65, 0x8c, 0xba, 0x93, 0xc1, 0x38},
+		[]byte{0x86, 0x27, 0x5d, 0xf0, 0x9c, 0xe8, 0xaa, 0xa8},
+		[]byte{0x43, 0x9d, 0xa0, 0x78, 0x4e, 0x74, 0x55, 0x54},
+		[]byte{0xaf, 0xc0, 0x50, 0x3c, 0x27, 0x3a, 0xa4, 0x2a},
+		[]byte{0xd9, 0x60, 0x28, 0x1e, 0x9d, 0x1d, 0x52, 0x15},
+		[]byte{0xe2, 0x30, 0x14, 0x0f, 0xc0, 0x80, 0x29, 0x84},
+		[]byte{0x71, 0x18, 0x0a, 0x89, 0x60, 0x40, 0x9a, 0x42},
+		[]byte{0xb6, 0x0c, 0x05, 0xca, 0x30, 0x20, 0x4d, 0x21},
+		[]byte{0x5b, 0x06, 0x8c, 0x65, 0x18, 0x10, 0xa8, 0x9e},
+		[]byte{0x45, 0x6c, 0x34, 0x88, 0x7a, 0x38, 0x05, 0xb9},
+		[]byte{0xac, 0x36, 0x1a, 0x44, 0x3d, 0x1c, 0x8c, 0xd2},
+		[]byte{0x56, 0x1b, 0x0d, 0x22, 0x90, 0x0e, 0x46, 0x69},
+		[]byte{0x2b, 0x83, 0x88, 0x11, 0x48, 0x07, 0x23, 0xba},
+		[]byte{0x9b, 0xcf, 0x44, 0x86, 0x24, 0x8d, 0x9f, 0x5d},
+		[]byte{0xc3, 0xe9, 0x22, 0x43, 0x12, 0xc8, 0xc1, 0xa0},
+		[]byte{0xef, 0xfa, 0x11, 0xaf, 0x09, 0x64, 0xee, 0x50},
+		[]byte{0xf9, 0x7d, 0x86, 0xd9, 0x8a, 0x32, 0x77, 0x28},
+		[]byte{0xe4, 0xfa, 0x20, 0x54, 0xa8, 0x0b, 0x32, 0x9c},
+		[]byte{0x72, 0x7d, 0x10, 0x2a, 0x54, 0x8b, 0x19, 0x4e},
+		[]byte{0x39, 0xb0, 0x08, 0x15, 0x2a, 0xcb, 0x82, 0x27},
+		[]byte{0x92, 0x58, 0x04, 0x84, 0x15, 0xeb, 0x41, 0x9d},
+		[]byte{0x49, 0x2c, 0x02, 0x42, 0x84, 0xfb, 0xae, 0xc0},
+		[]byte{0xaa, 0x16, 0x01, 0x21, 0x42, 0xf3, 0x57, 0x60},
+		[]byte{0x55, 0x0b, 0x8e, 0x9e, 0x21, 0xf7, 0xa5, 0x30},
+		[]byte{0xa4, 0x8b, 0x47, 0x4f, 0x9e, 0xf5, 0xdc, 0x18},
+		[]byte{0x70, 0xa6, 0xa5, 0x6e, 0x24, 0x40, 0x59, 0x8e},
+		[]byte{0x38, 0x53, 0xdc, 0x37, 0x12, 0x20, 0xa2, 0x47},
+		[]byte{0x1c, 0xa7, 0x6e, 0x95, 0x09, 0x10, 0x51, 0xad},
+		[]byte{0x0e, 0xdd, 0x37, 0xc4, 0x8a, 0x08, 0xa6, 0xd8},
+		[]byte{0x07, 0xe0, 0x95, 0x62, 0x45, 0x04, 0x53, 0x6c},
+		[]byte{0x8d, 0x70, 0xc4, 0x31, 0xac, 0x02, 0xa7, 0x36},
+		[]byte{0xc8, 0x38, 0x62, 0x96, 0x56, 0x01, 0xdd, 0x1b},
+		[]byte{0x64, 0x1c, 0x31, 0x4b, 0x2b, 0x8e, 0xe0, 0x83},
+	}
+	for i := 0; i < 64; i++ {
+		a[i] = binary.BigEndian.Uint64(as[i])
+	}
+}
+
+type Hash struct {
+	size int
+	buf  []byte
+	n    uint64
+	hsh  *[BlockSize]byte
+	chk  *[BlockSize]byte
+	tmp  *[BlockSize]byte
+}
+
+// Create new hash object with specified size digest size.
+func New(size int) *Hash {
+	if size != 32 && size != 64 {
+		panic("size must be either 32 or 64")
+	}
+	h := Hash{
+		size: size,
+		hsh:  new([BlockSize]byte),
+		chk:  new([BlockSize]byte),
+		tmp:  new([BlockSize]byte),
+	}
+	h.Reset()
+	return &h
+}
+
+func (h *Hash) Reset() {
+	h.n = 0
+	h.buf = nil
+	for i := 0; i < BlockSize; i++ {
+		h.chk[i] = 0
+		if h.size == 32 {
+			h.hsh[i] = 1
+		} else {
+			h.hsh[i] = 0
+		}
+	}
+}
+
+func (h *Hash) BlockSize() int {
+	return BlockSize
+}
+
+func (h *Hash) Size() int {
+	return h.size
+}
+
+func (h *Hash) Write(data []byte) (int, error) {
+	h.buf = append(h.buf, data...)
+	for len(h.buf) >= BlockSize {
+		copy(h.tmp[:], h.buf[:BlockSize])
+		h.hsh = g(h.n, h.hsh, h.tmp)
+		h.chk = add512bit(h.chk, h.tmp)
+		h.n += BlockSize * 8
+		h.buf = h.buf[BlockSize:]
+	}
+	return len(data), nil
+}
+
+func (h *Hash) Sum(in []byte) []byte {
+	buf := new([BlockSize]byte)
+	copy(h.tmp[:], buf[:])
+	copy(buf[:], h.buf[:])
+	buf[len(h.buf)] = 1
+	hsh := g(h.n, h.hsh, buf)
+	binary.LittleEndian.PutUint64(h.tmp[:], h.n+uint64(len(h.buf))*8)
+	hsh = g(0, hsh, h.tmp)
+	hsh = g(0, hsh, add512bit(h.chk, buf))
+	if h.size == 32 {
+		return append(in, hsh[BlockSize/2:]...)
+	}
+	return append(in, hsh[:]...)
+}
+
+func add512bit(chk, data *[BlockSize]byte) *[BlockSize]byte {
+	var ss uint16
+	r := new([BlockSize]byte)
+	for i := 0; i < BlockSize; i++ {
+		ss = uint16(chk[i]) + uint16(data[i]) + (ss >> 8)
+		r[i] = byte(0xFF & ss)
+	}
+	return r
+}
+
+func g(n uint64, hsh, data *[BlockSize]byte) *[BlockSize]byte {
+	ns := make([]byte, 8)
+	binary.LittleEndian.PutUint64(ns, n)
+	r := new([BlockSize]byte)
+	for i := 0; i < 8; i++ {
+		r[i] = hsh[i] ^ ns[i]
+	}
+	copy(r[8:], hsh[8:])
+	return blockXor(blockXor(e(l(ps(r)), data), hsh), data)
+}
+
+func e(k, msg *[BlockSize]byte) *[BlockSize]byte {
+	for i := 0; i < 12; i++ {
+		msg = l(ps(blockXor(k, msg)))
+		k = l(ps(blockXor(k, &c[i])))
+	}
+	return blockXor(k, msg)
+}
+
+func blockXor(x, y *[BlockSize]byte) *[BlockSize]byte {
+	r := new([BlockSize]byte)
+	for i := 0; i < BlockSize; i++ {
+		r[i] = x[i] ^ y[i]
+	}
+	return r
+}
+
+func ps(data *[BlockSize]byte) *[BlockSize]byte {
+	r := new([BlockSize]byte)
+	for i := 0; i < BlockSize; i++ {
+		r[tau[i]] = pi[int(data[i])]
+	}
+	return r
+}
+
+func l(data *[BlockSize]byte) *[BlockSize]byte {
+	var val uint64
+	var res64 uint64
+	var j int
+	r := new([BlockSize]byte)
+	for i := 0; i < 8; i++ {
+		val = binary.LittleEndian.Uint64(data[i*8 : i*8+8])
+		res64 = 0
+		for j = 0; j < BlockSize; j++ {
+			if val&0x8000000000000000 > 0 {
+				res64 ^= a[j]
+			}
+			val <<= 1
+		}
+		binary.LittleEndian.PutUint64(r[i*8:i*8+8], res64)
+	}
+	return r
+}
+
+func (h *Hash) MarshalBinary() (data []byte, err error) {
+	data = make([]byte, len(MarshaledName)+1+8+3*BlockSize+len(h.buf))
+	copy(data, []byte(MarshaledName))
+	idx := len(MarshaledName)
+	data[idx] = byte(h.size)
+	idx += 1
+	binary.BigEndian.PutUint64(data[idx:idx+8], h.n)
+	idx += 8
+	copy(data[idx:], h.hsh[:])
+	idx += BlockSize
+	copy(data[idx:], h.chk[:])
+	idx += BlockSize
+	copy(data[idx:], h.tmp[:])
+	idx += BlockSize
+	copy(data[idx:], h.buf)
+	return
+}
+
+func (h *Hash) UnmarshalBinary(data []byte) error {
+	if len(data) < len(MarshaledName)+1+8+3*BlockSize {
+		return errors.New("too short data")
+	}
+	if !bytes.HasPrefix(data, []byte(MarshaledName)) {
+		return errors.New("no hash name prefix")
+	}
+	idx := len(MarshaledName)
+	h.size = int(data[idx])
+	idx += 1
+	h.n = binary.BigEndian.Uint64(data[idx : idx+8])
+	idx += 8
+	copy(h.hsh[:], data[idx:])
+	idx += BlockSize
+	copy(h.chk[:], data[idx:])
+	idx += BlockSize
+	copy(h.tmp[:], data[idx:])
+	idx += BlockSize
+	h.buf = data[idx:]
+	return nil
+}