// GoGOST -- Pure Go GOST cryptographic functions library
-// Copyright (C) 2015-2019 Sergey Matveev <stargrave@stargrave.org>
+// Copyright (C) 2015-2021 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
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
},
}
a [64]uint64 // It is filled in init()
+
+ cache [8][256]uint64
)
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},
+ {0x8e, 0x20, 0xfa, 0xa7, 0x2b, 0xa0, 0xb4, 0x70},
+ {0x47, 0x10, 0x7d, 0xdd, 0x9b, 0x50, 0x5a, 0x38},
+ {0xad, 0x08, 0xb0, 0xe0, 0xc3, 0x28, 0x2d, 0x1c},
+ {0xd8, 0x04, 0x58, 0x70, 0xef, 0x14, 0x98, 0x0e},
+ {0x6c, 0x02, 0x2c, 0x38, 0xf9, 0x0a, 0x4c, 0x07},
+ {0x36, 0x01, 0x16, 0x1c, 0xf2, 0x05, 0x26, 0x8d},
+ {0x1b, 0x8e, 0x0b, 0x0e, 0x79, 0x8c, 0x13, 0xc8},
+ {0x83, 0x47, 0x8b, 0x07, 0xb2, 0x46, 0x87, 0x64},
+ {0xa0, 0x11, 0xd3, 0x80, 0x81, 0x8e, 0x8f, 0x40},
+ {0x50, 0x86, 0xe7, 0x40, 0xce, 0x47, 0xc9, 0x20},
+ {0x28, 0x43, 0xfd, 0x20, 0x67, 0xad, 0xea, 0x10},
+ {0x14, 0xaf, 0xf0, 0x10, 0xbd, 0xd8, 0x75, 0x08},
+ {0x0a, 0xd9, 0x78, 0x08, 0xd0, 0x6c, 0xb4, 0x04},
+ {0x05, 0xe2, 0x3c, 0x04, 0x68, 0x36, 0x5a, 0x02},
+ {0x8c, 0x71, 0x1e, 0x02, 0x34, 0x1b, 0x2d, 0x01},
+ {0x46, 0xb6, 0x0f, 0x01, 0x1a, 0x83, 0x98, 0x8e},
+ {0x90, 0xda, 0xb5, 0x2a, 0x38, 0x7a, 0xe7, 0x6f},
+ {0x48, 0x6d, 0xd4, 0x15, 0x1c, 0x3d, 0xfd, 0xb9},
+ {0x24, 0xb8, 0x6a, 0x84, 0x0e, 0x90, 0xf0, 0xd2},
+ {0x12, 0x5c, 0x35, 0x42, 0x07, 0x48, 0x78, 0x69},
+ {0x09, 0x2e, 0x94, 0x21, 0x8d, 0x24, 0x3c, 0xba},
+ {0x8a, 0x17, 0x4a, 0x9e, 0xc8, 0x12, 0x1e, 0x5d},
+ {0x45, 0x85, 0x25, 0x4f, 0x64, 0x09, 0x0f, 0xa0},
+ {0xac, 0xcc, 0x9c, 0xa9, 0x32, 0x8a, 0x89, 0x50},
+ {0x9d, 0x4d, 0xf0, 0x5d, 0x5f, 0x66, 0x14, 0x51},
+ {0xc0, 0xa8, 0x78, 0xa0, 0xa1, 0x33, 0x0a, 0xa6},
+ {0x60, 0x54, 0x3c, 0x50, 0xde, 0x97, 0x05, 0x53},
+ {0x30, 0x2a, 0x1e, 0x28, 0x6f, 0xc5, 0x8c, 0xa7},
+ {0x18, 0x15, 0x0f, 0x14, 0xb9, 0xec, 0x46, 0xdd},
+ {0x0c, 0x84, 0x89, 0x0a, 0xd2, 0x76, 0x23, 0xe0},
+ {0x06, 0x42, 0xca, 0x05, 0x69, 0x3b, 0x9f, 0x70},
+ {0x03, 0x21, 0x65, 0x8c, 0xba, 0x93, 0xc1, 0x38},
+ {0x86, 0x27, 0x5d, 0xf0, 0x9c, 0xe8, 0xaa, 0xa8},
+ {0x43, 0x9d, 0xa0, 0x78, 0x4e, 0x74, 0x55, 0x54},
+ {0xaf, 0xc0, 0x50, 0x3c, 0x27, 0x3a, 0xa4, 0x2a},
+ {0xd9, 0x60, 0x28, 0x1e, 0x9d, 0x1d, 0x52, 0x15},
+ {0xe2, 0x30, 0x14, 0x0f, 0xc0, 0x80, 0x29, 0x84},
+ {0x71, 0x18, 0x0a, 0x89, 0x60, 0x40, 0x9a, 0x42},
+ {0xb6, 0x0c, 0x05, 0xca, 0x30, 0x20, 0x4d, 0x21},
+ {0x5b, 0x06, 0x8c, 0x65, 0x18, 0x10, 0xa8, 0x9e},
+ {0x45, 0x6c, 0x34, 0x88, 0x7a, 0x38, 0x05, 0xb9},
+ {0xac, 0x36, 0x1a, 0x44, 0x3d, 0x1c, 0x8c, 0xd2},
+ {0x56, 0x1b, 0x0d, 0x22, 0x90, 0x0e, 0x46, 0x69},
+ {0x2b, 0x83, 0x88, 0x11, 0x48, 0x07, 0x23, 0xba},
+ {0x9b, 0xcf, 0x44, 0x86, 0x24, 0x8d, 0x9f, 0x5d},
+ {0xc3, 0xe9, 0x22, 0x43, 0x12, 0xc8, 0xc1, 0xa0},
+ {0xef, 0xfa, 0x11, 0xaf, 0x09, 0x64, 0xee, 0x50},
+ {0xf9, 0x7d, 0x86, 0xd9, 0x8a, 0x32, 0x77, 0x28},
+ {0xe4, 0xfa, 0x20, 0x54, 0xa8, 0x0b, 0x32, 0x9c},
+ {0x72, 0x7d, 0x10, 0x2a, 0x54, 0x8b, 0x19, 0x4e},
+ {0x39, 0xb0, 0x08, 0x15, 0x2a, 0xcb, 0x82, 0x27},
+ {0x92, 0x58, 0x04, 0x84, 0x15, 0xeb, 0x41, 0x9d},
+ {0x49, 0x2c, 0x02, 0x42, 0x84, 0xfb, 0xae, 0xc0},
+ {0xaa, 0x16, 0x01, 0x21, 0x42, 0xf3, 0x57, 0x60},
+ {0x55, 0x0b, 0x8e, 0x9e, 0x21, 0xf7, 0xa5, 0x30},
+ {0xa4, 0x8b, 0x47, 0x4f, 0x9e, 0xf5, 0xdc, 0x18},
+ {0x70, 0xa6, 0xa5, 0x6e, 0x24, 0x40, 0x59, 0x8e},
+ {0x38, 0x53, 0xdc, 0x37, 0x12, 0x20, 0xa2, 0x47},
+ {0x1c, 0xa7, 0x6e, 0x95, 0x09, 0x10, 0x51, 0xad},
+ {0x0e, 0xdd, 0x37, 0xc4, 0x8a, 0x08, 0xa6, 0xd8},
+ {0x07, 0xe0, 0x95, 0x62, 0x45, 0x04, 0x53, 0x6c},
+ {0x8d, 0x70, 0xc4, 0x31, 0xac, 0x02, 0xa7, 0x36},
+ {0xc8, 0x38, 0x62, 0x96, 0x56, 0x01, 0xdd, 0x1b},
+ {0x64, 0x1c, 0x31, 0x4b, 0x2b, 0x8e, 0xe0, 0x83},
}
for i := 0; i < 64; i++ {
a[i] = binary.BigEndian.Uint64(as[i])
}
+ for byteN := 0; byteN < 8; byteN++ {
+ for byteValN := 0; byteValN < 256; byteValN++ {
+ val := byte(byteValN)
+ res64 := uint64(0)
+ for bitN := 0; bitN < 8; bitN++ {
+ if val&0x80 > 0 {
+ res64 ^= a[(7-byteN)*8+bitN]
+ }
+ val <<= 1
+ }
+ cache[byteN][byteValN] = res64
+ }
+ }
}
type Hash struct {
- size int
- buf []byte
- n uint64
- hsh *[BlockSize]byte
- chk *[BlockSize]byte
- tmp *[BlockSize]byte
+ size int
+ buf []byte
+ n uint64
+ hsh []byte
+ chk []byte
+ tmp []byte
+ psBuf []byte
+ eBuf []byte
+ gBuf []byte
+ addBuf []byte
}
// Create new hash object with specified size digest size.
panic("size must be either 32 or 64")
}
h := Hash{
- size: size,
- hsh: new([BlockSize]byte),
- chk: new([BlockSize]byte),
- tmp: new([BlockSize]byte),
+ size: size,
+ hsh: make([]byte, BlockSize),
+ chk: make([]byte, BlockSize),
+ tmp: make([]byte, BlockSize),
+ psBuf: make([]byte, BlockSize),
+ eBuf: make([]byte, BlockSize),
+ gBuf: make([]byte, BlockSize),
+ addBuf: make([]byte, BlockSize),
}
h.Reset()
return &h
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)
+ copy(h.tmp, h.buf[:BlockSize])
+ h.hsh = h.g(h.n, h.hsh, h.tmp)
+ h.chk = h.add512bit(h.chk, h.tmp)
h.n += BlockSize * 8
h.buf = h.buf[BlockSize:]
}
}
func (h *Hash) Sum(in []byte) []byte {
- buf := new([BlockSize]byte)
- copy(h.tmp[:], buf[:])
- copy(buf[:], h.buf[:])
+ buf := make([]byte, BlockSize)
+ 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))
+ hsh := h.g(h.n, h.hsh, buf)
+ binary.LittleEndian.PutUint64(h.tmp, h.n+uint64(len(h.buf))*8)
+ hsh = h.g(0, hsh, h.tmp)
+ hsh = h.g(0, hsh, h.add512bit(h.chk, buf))
if h.size == 32 {
return append(in, hsh[BlockSize/2:]...)
}
- return append(in, hsh[:]...)
+ return append(in, hsh...)
}
-func add512bit(chk, data *[BlockSize]byte) *[BlockSize]byte {
+func (h *Hash) add512bit(chk, data []byte) []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)
+ h.addBuf[i] = byte(0xFF & ss)
}
- return r
+ return h.addBuf
}
-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 (h *Hash) g(n uint64, hsh, data []byte) []byte {
+ r := make([]byte, BlockSize)
+ copy(r, hsh)
+ r[0] ^= byte((n >> 0) & 0xFF)
+ r[1] ^= byte((n >> 8) & 0xFF)
+ r[2] ^= byte((n >> 16) & 0xFF)
+ r[3] ^= byte((n >> 24) & 0xFF)
+ r[4] ^= byte((n >> 32) & 0xFF)
+ r[5] ^= byte((n >> 40) & 0xFF)
+ r[6] ^= byte((n >> 48) & 0xFF)
+ r[7] ^= byte((n >> 56) & 0xFF)
+ return blockXor(h.gBuf, blockXor(h.gBuf, h.e(l(r, h.ps(r)), data), hsh), data)
}
-func e(k, msg *[BlockSize]byte) *[BlockSize]byte {
+func (h *Hash) e(k, msg []byte) []byte {
+ msgBuf := make([]byte, BlockSize)
+ kBuf := make([]byte, BlockSize)
for i := 0; i < 12; i++ {
- msg = l(ps(blockXor(k, msg)))
- k = l(ps(blockXor(k, &c[i])))
+ msg = l(msgBuf, h.ps(blockXor(h.eBuf, k, msg)))
+ k = l(kBuf, h.ps(blockXor(h.eBuf, k, c[i][:])))
}
- return blockXor(k, msg)
+ return blockXor(h.eBuf, k, msg)
}
-func blockXor(x, y *[BlockSize]byte) *[BlockSize]byte {
- r := new([BlockSize]byte)
+func blockXor(dst, x, y []byte) []byte {
for i := 0; i < BlockSize; i++ {
- r[i] = x[i] ^ y[i]
+ dst[i] = x[i] ^ y[i]
}
- return r
+ return dst
}
-func ps(data *[BlockSize]byte) *[BlockSize]byte {
- r := new([BlockSize]byte)
+func (h *Hash) ps(data []byte) []byte {
for i := 0; i < BlockSize; i++ {
- r[tau[i]] = pi[int(data[i])]
+ h.psBuf[tau[i]] = pi[int(data[i])]
}
- return r
+ return h.psBuf
}
-func l(data *[BlockSize]byte) *[BlockSize]byte {
- var val uint64
- var res64 uint64
- var j int
- r := new([BlockSize]byte)
+func l(out, data []byte) []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)
+ res64 := uint64(0)
+ res64 ^= cache[0][data[8*i+0]]
+ res64 ^= cache[1][data[8*i+1]]
+ res64 ^= cache[2][data[8*i+2]]
+ res64 ^= cache[3][data[8*i+3]]
+ res64 ^= cache[4][data[8*i+4]]
+ res64 ^= cache[5][data[8*i+5]]
+ res64 ^= cache[6][data[8*i+6]]
+ res64 ^= cache[7][data[8*i+7]]
+ binary.LittleEndian.PutUint64(out[i*8:i*8+8], res64)
}
- return r
+ return out
}
func (h *Hash) MarshalBinary() (data []byte, err error) {
- data = make([]byte, len(MarshaledName)+1+8+3*BlockSize+len(h.buf))
+ data = make([]byte, len(MarshaledName)+1+8+2*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[:])
+ copy(data[idx:], h.hsh)
idx += BlockSize
- copy(data[idx:], h.chk[:])
- idx += BlockSize
- copy(data[idx:], h.tmp[:])
+ copy(data[idx:], h.chk)
idx += BlockSize
copy(data[idx:], h.buf)
return
}
func (h *Hash) UnmarshalBinary(data []byte) error {
- expectedLen := len(MarshaledName) + 1 + 8 + 3*BlockSize
+ expectedLen := len(MarshaledName) + 1 + 8 + 2*BlockSize
if len(data) < expectedLen {
return fmt.Errorf("gogost/internal/gost34112012: len(data) != %d", expectedLen)
}
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:])
+ copy(h.hsh, data[idx:])
idx += BlockSize
- copy(h.tmp[:], data[idx:])
+ copy(h.chk, data[idx:])
idx += BlockSize
h.buf = data[idx:]
return nil