TAY
Fork of Crypto_light by
hash/MD2.cpp@16:d387221543a5, 2018-03-23 (annotated)
- Committer:
- ahaliassos
- Date:
- Fri Mar 23 22:05:23 2018 +0000
- Revision:
- 16:d387221543a5
- Parent:
- 13:ac8e23b98dae
commit
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
feb11 | 7:2dbbdfb08123 | 1 | /** |
feb11 | 7:2dbbdfb08123 | 2 | Implementation of MD2 as described here: |
feb11 | 7:2dbbdfb08123 | 3 | http://tools.ietf.org/html/rfc1319 |
feb11 | 7:2dbbdfb08123 | 4 | */ |
feb11 | 7:2dbbdfb08123 | 5 | |
feb11 | 7:2dbbdfb08123 | 6 | #include "MD2.h" |
feb11 | 7:2dbbdfb08123 | 7 | #include <string.h> |
feb11 | 7:2dbbdfb08123 | 8 | |
feb11 | 7:2dbbdfb08123 | 9 | |
feb11 | 7:2dbbdfb08123 | 10 | static const uint8_t s[] = |
feb11 | 7:2dbbdfb08123 | 11 | { |
feb11 | 7:2dbbdfb08123 | 12 | 0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13, |
feb11 | 7:2dbbdfb08123 | 13 | 0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C, 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA, |
feb11 | 7:2dbbdfb08123 | 14 | 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16, 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12, |
feb11 | 7:2dbbdfb08123 | 15 | 0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A, |
feb11 | 7:2dbbdfb08123 | 16 | 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F, 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21, |
feb11 | 7:2dbbdfb08123 | 17 | 0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03, |
feb11 | 7:2dbbdfb08123 | 18 | 0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1, 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6, |
feb11 | 7:2dbbdfb08123 | 19 | 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6, 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1, |
feb11 | 7:2dbbdfb08123 | 20 | 0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02, |
feb11 | 7:2dbbdfb08123 | 21 | 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6, 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F, |
feb11 | 7:2dbbdfb08123 | 22 | 0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26, |
feb11 | 7:2dbbdfb08123 | 23 | 0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09, 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52, |
feb11 | 7:2dbbdfb08123 | 24 | 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA, 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A, |
feb11 | 7:2dbbdfb08123 | 25 | 0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39, |
feb11 | 7:2dbbdfb08123 | 26 | 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4, 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A, |
feb11 | 7:2dbbdfb08123 | 27 | 0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14 |
feb11 | 7:2dbbdfb08123 | 28 | }; |
feb11 | 7:2dbbdfb08123 | 29 | |
feb11 | 7:2dbbdfb08123 | 30 | |
feb11 | 7:2dbbdfb08123 | 31 | MD2::MD2(): |
feb11 | 7:2dbbdfb08123 | 32 | HashAlgorithm(), |
feb11 | 7:2dbbdfb08123 | 33 | bufferLength(0), |
feb11 | 7:2dbbdfb08123 | 34 | l(0) |
feb11 | 7:2dbbdfb08123 | 35 | { |
feb11 | 7:2dbbdfb08123 | 36 | memset(checksum, 0, 16); |
feb11 | 7:2dbbdfb08123 | 37 | memset(x, 0, 16); |
feb11 | 7:2dbbdfb08123 | 38 | } |
feb11 | 7:2dbbdfb08123 | 39 | |
feb11 | 7:2dbbdfb08123 | 40 | uint8_t MD2::outputSize() const |
feb11 | 7:2dbbdfb08123 | 41 | { |
feb11 | 7:2dbbdfb08123 | 42 | return 16; |
feb11 | 7:2dbbdfb08123 | 43 | } |
feb11 | 7:2dbbdfb08123 | 44 | |
feb11 | 7:2dbbdfb08123 | 45 | void MD2::update(uint8_t *data, uint32_t length) |
feb11 | 7:2dbbdfb08123 | 46 | { |
feb11 | 7:2dbbdfb08123 | 47 | if(bufferLength == 0) |
feb11 | 7:2dbbdfb08123 | 48 | { |
feb11 | 7:2dbbdfb08123 | 49 | while(length >= 16) |
feb11 | 7:2dbbdfb08123 | 50 | { |
feb11 | 7:2dbbdfb08123 | 51 | computeBlock(checksum, x, &l, data); |
feb11 | 7:2dbbdfb08123 | 52 | length -= 16; |
feb11 | 7:2dbbdfb08123 | 53 | data += 16; |
feb11 | 7:2dbbdfb08123 | 54 | } |
feb11 | 7:2dbbdfb08123 | 55 | bufferLength = length; |
feb11 | 7:2dbbdfb08123 | 56 | memcpy(buffer, data, length); |
feb11 | 7:2dbbdfb08123 | 57 | } |
feb11 | 13:ac8e23b98dae | 58 | else if((int)length < 16-bufferLength) |
feb11 | 7:2dbbdfb08123 | 59 | { |
feb11 | 7:2dbbdfb08123 | 60 | memcpy(&buffer[bufferLength], data, length); |
feb11 | 7:2dbbdfb08123 | 61 | bufferLength += length; |
feb11 | 7:2dbbdfb08123 | 62 | } |
feb11 | 7:2dbbdfb08123 | 63 | else |
feb11 | 7:2dbbdfb08123 | 64 | { |
feb11 | 7:2dbbdfb08123 | 65 | int offset = 16-bufferLength; |
feb11 | 7:2dbbdfb08123 | 66 | memcpy(&buffer[bufferLength], data, offset); |
feb11 | 7:2dbbdfb08123 | 67 | computeBlock(checksum, x, &l, buffer); |
feb11 | 7:2dbbdfb08123 | 68 | data += offset; |
feb11 | 7:2dbbdfb08123 | 69 | length -= offset; |
feb11 | 7:2dbbdfb08123 | 70 | while(length >= 16) |
feb11 | 7:2dbbdfb08123 | 71 | { |
feb11 | 7:2dbbdfb08123 | 72 | computeBlock(checksum, x, &l, data); |
feb11 | 7:2dbbdfb08123 | 73 | data += 16; |
feb11 | 7:2dbbdfb08123 | 74 | length -= 16; |
feb11 | 7:2dbbdfb08123 | 75 | } |
feb11 | 7:2dbbdfb08123 | 76 | bufferLength = length; |
feb11 | 7:2dbbdfb08123 | 77 | memcpy(buffer, &data, length); |
feb11 | 7:2dbbdfb08123 | 78 | } |
feb11 | 7:2dbbdfb08123 | 79 | |
feb11 | 7:2dbbdfb08123 | 80 | } |
feb11 | 7:2dbbdfb08123 | 81 | |
feb11 | 7:2dbbdfb08123 | 82 | void MD2::finalize(uint8_t *hash) |
feb11 | 7:2dbbdfb08123 | 83 | { |
feb11 | 7:2dbbdfb08123 | 84 | // compute what's left data the buffer |
feb11 | 7:2dbbdfb08123 | 85 | int padding = 16 - bufferLength; |
feb11 | 7:2dbbdfb08123 | 86 | memset(&buffer[bufferLength], padding, padding); |
feb11 | 7:2dbbdfb08123 | 87 | computeBlock(checksum, x, &l, buffer); |
feb11 | 7:2dbbdfb08123 | 88 | computeBlock(checksum, x, &l, checksum); |
feb11 | 7:2dbbdfb08123 | 89 | memcpy(hash, x, 16); |
feb11 | 7:2dbbdfb08123 | 90 | |
feb11 | 7:2dbbdfb08123 | 91 | uint32_t *x2 = (uint32_t*)x; |
feb11 | 7:2dbbdfb08123 | 92 | uint32_t *checksum2 = (uint32_t*)checksum; |
feb11 | 7:2dbbdfb08123 | 93 | |
feb11 | 7:2dbbdfb08123 | 94 | // reset state |
feb11 | 7:2dbbdfb08123 | 95 | bufferLength = 0; |
feb11 | 7:2dbbdfb08123 | 96 | l = 0; |
feb11 | 7:2dbbdfb08123 | 97 | checksum2[0] = x2[0] = 0; |
feb11 | 7:2dbbdfb08123 | 98 | checksum2[1] = x2[1] = 0; |
feb11 | 7:2dbbdfb08123 | 99 | checksum2[2] = x2[2] = 0; |
feb11 | 7:2dbbdfb08123 | 100 | checksum2[3] = x2[3] = 0; |
feb11 | 7:2dbbdfb08123 | 101 | } |
feb11 | 7:2dbbdfb08123 | 102 | |
feb11 | 7:2dbbdfb08123 | 103 | void MD2::computeHash(uint8_t *hash, uint8_t *data, uint32_t length) |
feb11 | 7:2dbbdfb08123 | 104 | { |
feb11 | 7:2dbbdfb08123 | 105 | uint8_t x[48]; |
feb11 | 7:2dbbdfb08123 | 106 | uint8_t checksum[16]; |
feb11 | 7:2dbbdfb08123 | 107 | uint8_t buffer[16]; |
feb11 | 7:2dbbdfb08123 | 108 | memset(x, 0, 16); |
feb11 | 7:2dbbdfb08123 | 109 | memset(checksum, 0, 16); |
feb11 | 7:2dbbdfb08123 | 110 | uint8_t l = 0; |
feb11 | 7:2dbbdfb08123 | 111 | while(length >= 16) |
feb11 | 7:2dbbdfb08123 | 112 | { |
feb11 | 7:2dbbdfb08123 | 113 | computeBlock(checksum, x, &l, data); |
feb11 | 7:2dbbdfb08123 | 114 | length -= 16; |
feb11 | 7:2dbbdfb08123 | 115 | data += 16; |
feb11 | 7:2dbbdfb08123 | 116 | } |
feb11 | 7:2dbbdfb08123 | 117 | |
feb11 | 7:2dbbdfb08123 | 118 | memcpy(buffer, data, length); |
feb11 | 7:2dbbdfb08123 | 119 | uint8_t padding = 16-length; |
feb11 | 7:2dbbdfb08123 | 120 | memset(&buffer[length], padding, padding); |
feb11 | 7:2dbbdfb08123 | 121 | computeBlock(checksum, x, &l, buffer); |
feb11 | 7:2dbbdfb08123 | 122 | computeBlock(checksum,x, &l, checksum); |
feb11 | 7:2dbbdfb08123 | 123 | memcpy(hash, x, 16); |
feb11 | 7:2dbbdfb08123 | 124 | } |
feb11 | 7:2dbbdfb08123 | 125 | |
feb11 | 13:ac8e23b98dae | 126 | #ifdef __CC_ARM |
feb11 | 13:ac8e23b98dae | 127 | __forceinline |
feb11 | 13:ac8e23b98dae | 128 | #endif |
feb11 | 13:ac8e23b98dae | 129 | void MD2::computeBlock(uint8_t *checksum2, uint8_t *x2, uint8_t *l2, uint8_t *buffer2) |
feb11 | 7:2dbbdfb08123 | 130 | { |
feb11 | 7:2dbbdfb08123 | 131 | if(checksum2 != buffer2) |
feb11 | 7:2dbbdfb08123 | 132 | { |
feb11 | 13:ac8e23b98dae | 133 | #ifdef __CC_ARM |
feb11 | 13:ac8e23b98dae | 134 | #pragma unroll_completely |
feb11 | 13:ac8e23b98dae | 135 | #endif |
feb11 | 7:2dbbdfb08123 | 136 | for(int j = 0; j < 16; ++j) |
feb11 | 7:2dbbdfb08123 | 137 | { |
feb11 | 7:2dbbdfb08123 | 138 | uint8_t c = buffer2[j]; |
feb11 | 7:2dbbdfb08123 | 139 | *l2 = (checksum2[j] ^= s[c^(*l2)]); |
feb11 | 7:2dbbdfb08123 | 140 | } |
feb11 | 7:2dbbdfb08123 | 141 | } |
feb11 | 7:2dbbdfb08123 | 142 | |
feb11 | 7:2dbbdfb08123 | 143 | uint32_t *x3 = (uint32_t*)x2; |
feb11 | 7:2dbbdfb08123 | 144 | uint32_t *buffer3 = (uint32_t*)buffer2; |
feb11 | 7:2dbbdfb08123 | 145 | |
feb11 | 7:2dbbdfb08123 | 146 | x3[4] = buffer3[0]; |
feb11 | 7:2dbbdfb08123 | 147 | x3[5] = buffer3[1]; |
feb11 | 7:2dbbdfb08123 | 148 | x3[6] = buffer3[2]; |
feb11 | 7:2dbbdfb08123 | 149 | x3[7] = buffer3[3]; |
feb11 | 7:2dbbdfb08123 | 150 | for(int j = 0; j < 4; ++j) |
feb11 | 7:2dbbdfb08123 | 151 | x3[8+j] = x3[4+j] ^ x3[j]; |
feb11 | 7:2dbbdfb08123 | 152 | |
feb11 | 7:2dbbdfb08123 | 153 | uint8_t t = 0; |
feb11 | 13:ac8e23b98dae | 154 | #ifdef __CC_ARM |
feb11 | 13:ac8e23b98dae | 155 | #pragma unroll_completely |
feb11 | 13:ac8e23b98dae | 156 | #endif |
feb11 | 7:2dbbdfb08123 | 157 | for(int j = 0; j < 18; ++j) |
feb11 | 7:2dbbdfb08123 | 158 | { |
feb11 | 7:2dbbdfb08123 | 159 | t = (x2[0] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 160 | t = (x2[1] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 161 | t = (x2[2] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 162 | t = (x2[3] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 163 | t = (x2[4] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 164 | t = (x2[5] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 165 | t = (x2[6] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 166 | t = (x2[7] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 167 | t = (x2[8] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 168 | t = (x2[9] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 169 | t = (x2[10] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 170 | t = (x2[11] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 171 | t = (x2[12] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 172 | t = (x2[13] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 173 | t = (x2[14] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 174 | t = (x2[15] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 175 | t = (x2[16] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 176 | t = (x2[17] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 177 | t = (x2[18] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 178 | t = (x2[19] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 179 | t = (x2[20] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 180 | t = (x2[21] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 181 | t = (x2[22] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 182 | t = (x2[23] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 183 | t = (x2[24] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 184 | t = (x2[25] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 185 | t = (x2[26] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 186 | t = (x2[27] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 187 | t = (x2[28] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 188 | t = (x2[29] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 189 | t = (x2[30] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 190 | t = (x2[31] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 191 | t = (x2[32] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 192 | t = (x2[33] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 193 | t = (x2[34] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 194 | t = (x2[35] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 195 | t = (x2[36] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 196 | t = (x2[37] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 197 | t = (x2[38] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 198 | t = (x2[39] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 199 | t = (x2[40] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 200 | t = (x2[41] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 201 | t = (x2[42] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 202 | t = (x2[43] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 203 | t = (x2[44] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 204 | t = (x2[45] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 205 | t = (x2[46] ^= s[t]); |
feb11 | 7:2dbbdfb08123 | 206 | t = (x2[47] ^= s[t]); |
feb11 | 10:bc9c23aa3870 | 207 | |
feb11 | 7:2dbbdfb08123 | 208 | t += j; |
feb11 | 7:2dbbdfb08123 | 209 | } |
feb11 | 7:2dbbdfb08123 | 210 | } |