1 /* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */ 2 #include <libpldm/base.h> 3 #include <libpldm/utils.h> 4 #include "utils.h" 5 6 #include <limits.h> 7 #include <stdio.h> 8 9 /** CRC32 code derived from work by Gary S. Brown. 10 * http://web.mit.edu/freebsd/head/sys/libkern/crc32.c 11 * 12 * COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or 13 * code or tables extracted from it, as desired without restriction. 14 * 15 */ 16 static uint32_t crc32_tab[] = { 17 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 18 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 19 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 20 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 21 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 22 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 23 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 24 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 25 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 26 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 27 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, 28 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, 29 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 30 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 31 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 32 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 33 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 34 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 35 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 36 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 37 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 38 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 39 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 40 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 41 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 42 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 43 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, 44 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 45 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 46 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 47 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 48 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 49 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 50 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 51 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, 52 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 53 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 54 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 55 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 56 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 57 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 58 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 59 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d 60 }; 61 62 /* 0x07(polynomial: x8+x2+x1+1) 63 */ 64 static const uint8_t crc8_table[] = { 65 0x00, 0x07, 0x0e, 0x09, 0x1c, 0x1b, 0x12, 0x15, 0x38, 0x3f, 0x36, 0x31, 66 0x24, 0x23, 0x2a, 0x2d, 0x70, 0x77, 0x7e, 0x79, 0x6c, 0x6b, 0x62, 0x65, 67 0x48, 0x4f, 0x46, 0x41, 0x54, 0x53, 0x5a, 0x5d, 0xe0, 0xe7, 0xee, 0xe9, 68 0xfc, 0xfb, 0xf2, 0xf5, 0xd8, 0xdf, 0xd6, 0xd1, 0xc4, 0xc3, 0xca, 0xcd, 69 0x90, 0x97, 0x9e, 0x99, 0x8c, 0x8b, 0x82, 0x85, 0xa8, 0xaf, 0xa6, 0xa1, 70 0xb4, 0xb3, 0xba, 0xbd, 0xc7, 0xc0, 0xc9, 0xce, 0xdb, 0xdc, 0xd5, 0xd2, 71 0xff, 0xf8, 0xf1, 0xf6, 0xe3, 0xe4, 0xed, 0xea, 0xb7, 0xb0, 0xb9, 0xbe, 72 0xab, 0xac, 0xa5, 0xa2, 0x8f, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9d, 0x9a, 73 0x27, 0x20, 0x29, 0x2e, 0x3b, 0x3c, 0x35, 0x32, 0x1f, 0x18, 0x11, 0x16, 74 0x03, 0x04, 0x0d, 0x0a, 0x57, 0x50, 0x59, 0x5e, 0x4b, 0x4c, 0x45, 0x42, 75 0x6f, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7d, 0x7a, 0x89, 0x8e, 0x87, 0x80, 76 0x95, 0x92, 0x9b, 0x9c, 0xb1, 0xb6, 0xbf, 0xb8, 0xad, 0xaa, 0xa3, 0xa4, 77 0xf9, 0xfe, 0xf7, 0xf0, 0xe5, 0xe2, 0xeb, 0xec, 0xc1, 0xc6, 0xcf, 0xc8, 78 0xdd, 0xda, 0xd3, 0xd4, 0x69, 0x6e, 0x67, 0x60, 0x75, 0x72, 0x7b, 0x7c, 79 0x51, 0x56, 0x5f, 0x58, 0x4d, 0x4a, 0x43, 0x44, 0x19, 0x1e, 0x17, 0x10, 80 0x05, 0x02, 0x0b, 0x0c, 0x21, 0x26, 0x2f, 0x28, 0x3d, 0x3a, 0x33, 0x34, 81 0x4e, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5c, 0x5b, 0x76, 0x71, 0x78, 0x7f, 82 0x6a, 0x6d, 0x64, 0x63, 0x3e, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2c, 0x2b, 83 0x06, 0x01, 0x08, 0x0f, 0x1a, 0x1d, 0x14, 0x13, 0xae, 0xa9, 0xa0, 0xa7, 84 0xb2, 0xb5, 0xbc, 0xbb, 0x96, 0x91, 0x98, 0x9f, 0x8a, 0x8d, 0x84, 0x83, 85 0xde, 0xd9, 0xd0, 0xd7, 0xc2, 0xc5, 0xcc, 0xcb, 0xe6, 0xe1, 0xe8, 0xef, 86 0xfa, 0xfd, 0xf4, 0xf3 87 }; 88 89 LIBPLDM_ABI_STABLE 90 uint32_t pldm_edac_crc32(const void *data, size_t size) 91 { 92 const uint8_t *p = data; 93 uint32_t crc = ~0U; 94 while (size--) { 95 crc = crc32_tab[(crc ^ *p++) & 0xff] ^ (crc >> 8); 96 } 97 return crc ^ ~0U; 98 } 99 100 int pldm_edac_crc32_validate(uint32_t expected, const void *data, size_t size) 101 { 102 if (!data && size) { /* data is NULL but size is not zero */ 103 return -EINVAL; 104 } 105 uint32_t actual = pldm_edac_crc32(data, size); 106 return (expected == actual) ? 0 : -EUCLEAN; 107 } 108 109 LIBPLDM_ABI_STABLE 110 uint8_t pldm_edac_crc8(const void *data, size_t size) 111 { 112 const uint8_t *p = data; 113 uint8_t crc = 0x00; 114 while (size--) { 115 crc = crc8_table[crc ^ *p++]; 116 } 117 return crc; 118 } 119 120 #define BCD_H(v) (((v) >> 4) & 0xf) 121 #define BCD_L(v) ((v) & 0xf) 122 #define AS_CHAR(digit) ((digit) + '0') 123 #define INSERT_CHAR(c, b, n) \ 124 { \ 125 if ((n) > 1) { \ 126 *(b)++ = (c); \ 127 (n)--; \ 128 } \ 129 } 130 #define INSERT_INT(i, b, n) INSERT_CHAR(AS_CHAR(i), (b), (n)) 131 132 LIBPLDM_ABI_STABLE 133 ssize_t ver2str(const ver32_t *version, char *buffer, size_t buffer_size) 134 { 135 ssize_t remaining; 136 char *cursor; 137 138 if (!version || !buffer) { 139 return -1; 140 } 141 142 if (!buffer_size) { 143 return -1; 144 } 145 146 if (buffer_size > SSIZE_MAX) { 147 return -1; 148 } 149 150 cursor = buffer; 151 remaining = (ssize_t)buffer_size; 152 153 if (version->major < 0xf0) 154 INSERT_INT(BCD_H(version->major), cursor, remaining) 155 INSERT_INT(BCD_L(version->major), cursor, remaining); 156 INSERT_CHAR('.', cursor, remaining); 157 158 if (version->minor < 0xf0) 159 INSERT_INT(BCD_H(version->minor), cursor, remaining); 160 INSERT_INT(BCD_L(version->minor), cursor, remaining); 161 162 if (version->update < 0xff) { 163 INSERT_CHAR('.', cursor, remaining); 164 if (version->update < 0xf0) 165 INSERT_INT(BCD_H(version->update), cursor, remaining); 166 INSERT_INT(BCD_L(version->update), cursor, remaining); 167 } 168 169 if (version->alpha) 170 INSERT_CHAR(version->alpha, cursor, remaining); 171 172 *cursor = '\0'; 173 174 return (ssize_t)buffer_size - remaining; 175 } 176 177 LIBPLDM_ABI_STABLE 178 uint8_t bcd2dec8(uint8_t bcd) 179 { 180 return (bcd >> 4) * 10 + (bcd & 0x0f); 181 } 182 183 LIBPLDM_ABI_STABLE 184 uint8_t dec2bcd8(uint8_t dec) 185 { 186 return ((dec / 10) << 4) + (dec % 10); 187 } 188 189 LIBPLDM_ABI_STABLE 190 uint16_t bcd2dec16(uint16_t bcd) 191 { 192 return bcd2dec8(bcd >> 8) * 100 + bcd2dec8(bcd & 0xff); 193 } 194 195 LIBPLDM_ABI_STABLE 196 uint16_t dec2bcd16(uint16_t dec) 197 { 198 return dec2bcd8(dec % 100) | ((uint16_t)(dec2bcd8(dec / 100)) << 8); 199 } 200 201 LIBPLDM_ABI_STABLE 202 uint32_t bcd2dec32(uint32_t bcd) 203 { 204 return bcd2dec16(bcd >> 16) * 10000 + bcd2dec16(bcd & 0xffff); 205 } 206 207 LIBPLDM_ABI_STABLE 208 uint32_t dec2bcd32(uint32_t dec) 209 { 210 return dec2bcd16(dec % 10000) | 211 ((uint32_t)(dec2bcd16(dec / 10000)) << 16); 212 } 213 214 static int day_map(uint8_t month) 215 { 216 switch (month) { 217 case 1: 218 return 31; 219 case 2: 220 return 28; 221 case 3: 222 return 31; 223 case 4: 224 return 30; 225 case 5: 226 return 31; 227 case 6: 228 return 30; 229 case 7: 230 case 8: 231 return 31; 232 case 9: 233 return 30; 234 case 10: 235 return 31; 236 case 11: 237 return 30; 238 case 12: 239 return 31; 240 default: 241 return 0; 242 } 243 } 244 245 LIBPLDM_ABI_DEPRECATED 246 bool is_time_legal(uint8_t seconds, uint8_t minutes, uint8_t hours, uint8_t day, 247 uint8_t month, uint16_t year) 248 { 249 if (month < 1 || month > 12) { 250 return false; 251 } 252 int rday = day_map(month); 253 if (month == 2 && 254 ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))) { 255 rday += 1; 256 } 257 if (year < 1970 || day < 1 || day > rday || seconds > 59 || 258 minutes > 59 || hours > 23) { 259 return false; 260 } 261 return true; 262 } 263 264 LIBPLDM_ABI_DEPRECATED 265 bool is_transfer_flag_valid(uint8_t transfer_flag) 266 { 267 switch (transfer_flag) { 268 case PLDM_START: 269 case PLDM_MIDDLE: 270 case PLDM_END: 271 case PLDM_START_AND_END: 272 return true; 273 274 default: 275 return false; 276 } 277 } 278