github.com/blend/go-sdk@v1.20220411.3/shamir/tables.go (about)

     1  /*
     2  
     3  Copyright (c) 2022 - Present. Blend Labs, Inc. All rights reserved
     4  Use of this source code is governed by a MIT license that can be found in the LICENSE file.
     5  
     6  */
     7  
     8  package shamir
     9  
    10  // Tables taken from http://www.samiam.org/galois.html
    11  // They use 0xe5 (229) as the generator
    12  
    13  var (
    14  	// logTable provides the log(X)/log(g) at each index X
    15  	logTable = [256]uint8{
    16  		0x00, 0xff, 0xc8, 0x08, 0x91, 0x10, 0xd0, 0x36,
    17  		0x5a, 0x3e, 0xd8, 0x43, 0x99, 0x77, 0xfe, 0x18,
    18  		0x23, 0x20, 0x07, 0x70, 0xa1, 0x6c, 0x0c, 0x7f,
    19  		0x62, 0x8b, 0x40, 0x46, 0xc7, 0x4b, 0xe0, 0x0e,
    20  		0xeb, 0x16, 0xe8, 0xad, 0xcf, 0xcd, 0x39, 0x53,
    21  		0x6a, 0x27, 0x35, 0x93, 0xd4, 0x4e, 0x48, 0xc3,
    22  		0x2b, 0x79, 0x54, 0x28, 0x09, 0x78, 0x0f, 0x21,
    23  		0x90, 0x87, 0x14, 0x2a, 0xa9, 0x9c, 0xd6, 0x74,
    24  		0xb4, 0x7c, 0xde, 0xed, 0xb1, 0x86, 0x76, 0xa4,
    25  		0x98, 0xe2, 0x96, 0x8f, 0x02, 0x32, 0x1c, 0xc1,
    26  		0x33, 0xee, 0xef, 0x81, 0xfd, 0x30, 0x5c, 0x13,
    27  		0x9d, 0x29, 0x17, 0xc4, 0x11, 0x44, 0x8c, 0x80,
    28  		0xf3, 0x73, 0x42, 0x1e, 0x1d, 0xb5, 0xf0, 0x12,
    29  		0xd1, 0x5b, 0x41, 0xa2, 0xd7, 0x2c, 0xe9, 0xd5,
    30  		0x59, 0xcb, 0x50, 0xa8, 0xdc, 0xfc, 0xf2, 0x56,
    31  		0x72, 0xa6, 0x65, 0x2f, 0x9f, 0x9b, 0x3d, 0xba,
    32  		0x7d, 0xc2, 0x45, 0x82, 0xa7, 0x57, 0xb6, 0xa3,
    33  		0x7a, 0x75, 0x4f, 0xae, 0x3f, 0x37, 0x6d, 0x47,
    34  		0x61, 0xbe, 0xab, 0xd3, 0x5f, 0xb0, 0x58, 0xaf,
    35  		0xca, 0x5e, 0xfa, 0x85, 0xe4, 0x4d, 0x8a, 0x05,
    36  		0xfb, 0x60, 0xb7, 0x7b, 0xb8, 0x26, 0x4a, 0x67,
    37  		0xc6, 0x1a, 0xf8, 0x69, 0x25, 0xb3, 0xdb, 0xbd,
    38  		0x66, 0xdd, 0xf1, 0xd2, 0xdf, 0x03, 0x8d, 0x34,
    39  		0xd9, 0x92, 0x0d, 0x63, 0x55, 0xaa, 0x49, 0xec,
    40  		0xbc, 0x95, 0x3c, 0x84, 0x0b, 0xf5, 0xe6, 0xe7,
    41  		0xe5, 0xac, 0x7e, 0x6e, 0xb9, 0xf9, 0xda, 0x8e,
    42  		0x9a, 0xc9, 0x24, 0xe1, 0x0a, 0x15, 0x6b, 0x3a,
    43  		0xa0, 0x51, 0xf4, 0xea, 0xb2, 0x97, 0x9e, 0x5d,
    44  		0x22, 0x88, 0x94, 0xce, 0x19, 0x01, 0x71, 0x4c,
    45  		0xa5, 0xe3, 0xc5, 0x31, 0xbb, 0xcc, 0x1f, 0x2d,
    46  		0x3b, 0x52, 0x6f, 0xf6, 0x2e, 0x89, 0xf7, 0xc0,
    47  		0x68, 0x1b, 0x64, 0x04, 0x06, 0xbf, 0x83, 0x38}
    48  
    49  	// expTable provides the anti-log or exponentiation value
    50  	// for the equivalent index
    51  	expTable = [256]uint8{
    52  		0x01, 0xe5, 0x4c, 0xb5, 0xfb, 0x9f, 0xfc, 0x12,
    53  		0x03, 0x34, 0xd4, 0xc4, 0x16, 0xba, 0x1f, 0x36,
    54  		0x05, 0x5c, 0x67, 0x57, 0x3a, 0xd5, 0x21, 0x5a,
    55  		0x0f, 0xe4, 0xa9, 0xf9, 0x4e, 0x64, 0x63, 0xee,
    56  		0x11, 0x37, 0xe0, 0x10, 0xd2, 0xac, 0xa5, 0x29,
    57  		0x33, 0x59, 0x3b, 0x30, 0x6d, 0xef, 0xf4, 0x7b,
    58  		0x55, 0xeb, 0x4d, 0x50, 0xb7, 0x2a, 0x07, 0x8d,
    59  		0xff, 0x26, 0xd7, 0xf0, 0xc2, 0x7e, 0x09, 0x8c,
    60  		0x1a, 0x6a, 0x62, 0x0b, 0x5d, 0x82, 0x1b, 0x8f,
    61  		0x2e, 0xbe, 0xa6, 0x1d, 0xe7, 0x9d, 0x2d, 0x8a,
    62  		0x72, 0xd9, 0xf1, 0x27, 0x32, 0xbc, 0x77, 0x85,
    63  		0x96, 0x70, 0x08, 0x69, 0x56, 0xdf, 0x99, 0x94,
    64  		0xa1, 0x90, 0x18, 0xbb, 0xfa, 0x7a, 0xb0, 0xa7,
    65  		0xf8, 0xab, 0x28, 0xd6, 0x15, 0x8e, 0xcb, 0xf2,
    66  		0x13, 0xe6, 0x78, 0x61, 0x3f, 0x89, 0x46, 0x0d,
    67  		0x35, 0x31, 0x88, 0xa3, 0x41, 0x80, 0xca, 0x17,
    68  		0x5f, 0x53, 0x83, 0xfe, 0xc3, 0x9b, 0x45, 0x39,
    69  		0xe1, 0xf5, 0x9e, 0x19, 0x5e, 0xb6, 0xcf, 0x4b,
    70  		0x38, 0x04, 0xb9, 0x2b, 0xe2, 0xc1, 0x4a, 0xdd,
    71  		0x48, 0x0c, 0xd0, 0x7d, 0x3d, 0x58, 0xde, 0x7c,
    72  		0xd8, 0x14, 0x6b, 0x87, 0x47, 0xe8, 0x79, 0x84,
    73  		0x73, 0x3c, 0xbd, 0x92, 0xc9, 0x23, 0x8b, 0x97,
    74  		0x95, 0x44, 0xdc, 0xad, 0x40, 0x65, 0x86, 0xa2,
    75  		0xa4, 0xcc, 0x7f, 0xec, 0xc0, 0xaf, 0x91, 0xfd,
    76  		0xf7, 0x4f, 0x81, 0x2f, 0x5b, 0xea, 0xa8, 0x1c,
    77  		0x02, 0xd1, 0x98, 0x71, 0xed, 0x25, 0xe3, 0x24,
    78  		0x06, 0x68, 0xb3, 0x93, 0x2c, 0x6f, 0x3e, 0x6c,
    79  		0x0a, 0xb8, 0xce, 0xae, 0x74, 0xb1, 0x42, 0xb4,
    80  		0x1e, 0xd3, 0x49, 0xe9, 0x9c, 0xc8, 0xc6, 0xc7,
    81  		0x22, 0x6e, 0xdb, 0x20, 0xbf, 0x43, 0x51, 0x52,
    82  		0x66, 0xb2, 0x76, 0x60, 0xda, 0xc5, 0xf3, 0xf6,
    83  		0xaa, 0xcd, 0x9a, 0xa0, 0x75, 0x54, 0x0e, 0x01}
    84  )