| 1 | /*␊ |
| 2 | * Convert.c␊ |
| 3 | * Implement conversion utility functions␊ |
| 4 | * Create UUID parsing functions and gather other conversion routines␊ |
| 5 | * --Rek␊ |
| 6 | */␊ |
| 7 | ␊ |
| 8 | #include "convert.h"␊ |
| 9 | ␊ |
| 10 | /** Transform a 16 bytes hexadecimal value UUID to a string */␊ |
| 11 | const char * getStringFromUUID(const EFI_CHAR8* eUUID)␊ |
| 12 | {␊ |
| 13 | static char msg[UUID_LEN*2 + 8] = "";␊ |
| 14 | if (!eUUID) return "";␊ |
| 15 | const unsigned char * uuid = (unsigned char*) eUUID;␊ |
| 16 | sprintf(msg, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",␊ |
| 17 | ␉␉ uuid[0], uuid[1], uuid[2], uuid[3], ␊ |
| 18 | ␉␉ uuid[4], uuid[5], uuid[6], uuid[7],␊ |
| 19 | ␉␉ uuid[8], uuid[9], uuid[10],uuid[11],␊ |
| 20 | ␉␉ uuid[12],uuid[13],uuid[14],uuid[15]);␊ |
| 21 | return msg ;␊ |
| 22 | }␊ |
| 23 | ␊ |
| 24 | /** Parse an UUID string into an (EFI_CHAR8*) buffer */␊ |
| 25 | EFI_CHAR8* getUUIDFromString(const char *source)␊ |
| 26 | {␊ |
| 27 | if (!source) return 0;␊ |
| 28 | ␊ |
| 29 | ␉char␉*p = (char *)source;␊ |
| 30 | ␉int␉i;␊ |
| 31 | ␉char␉buf[3];␊ |
| 32 | ␉static EFI_CHAR8 uuid[UUID_LEN+1]="";␊ |
| 33 | ␊ |
| 34 | ␉buf[2] = '\0';␊ |
| 35 | ␉for (i=0; i<UUID_LEN; i++) {␊ |
| 36 | ␉␉if (p[0] == '\0' || p[1] == '\0' || !isxdigit(p[0]) || !isxdigit(p[1])) {␊ |
| 37 | ␉␉␉verbose("[ERROR] UUID='%s' syntax error\n", source);␊ |
| 38 | ␉␉␉return 0;␊ |
| 39 | ␉␉}␊ |
| 40 | ␉␉buf[0] = *p++;␊ |
| 41 | ␉␉buf[1] = *p++;␊ |
| 42 | ␉␉uuid[i] = (unsigned char) strtoul(buf, NULL, 16);␊ |
| 43 | ␉␉if (*p == '-' && (i % 2) == 1 && i < UUID_LEN - 1) {␊ |
| 44 | ␉␉␉p++;␊ |
| 45 | ␉␉}␊ |
| 46 | ␉}␊ |
| 47 | ␉uuid[UUID_LEN]='\0';␊ |
| 48 | ␊ |
| 49 | ␉if (*p != '\0') {␊ |
| 50 | ␉␉verbose("[ERROR] UUID='%s' syntax error\n", source);␊ |
| 51 | ␉␉return 0;␊ |
| 52 | ␉}␊ |
| 53 | ␉return uuid;␊ |
| 54 | }␊ |
| 55 | ␊ |
| 56 | /** XXX AsereBLN replace by strtoul */␊ |
| 57 | uint32_t ascii_hex_to_int(char *buff) ␊ |
| 58 | {␊ |
| 59 | ␉uint32_t␉value = 0, i, digit;␊ |
| 60 | ␉for(i = 0; i < strlen(buff); i++)␊ |
| 61 | ␉{␊ |
| 62 | ␉␉if (buff[i] >= 48 && buff[i] <= 57)␉␉␉// '0' through '9'␊ |
| 63 | ␉␉␉digit = buff[i] - 48;␉␊ |
| 64 | ␉␉else if (buff[i] >= 65 && buff[i] <= 70)␉// 'A' through 'F'␊ |
| 65 | ␉␉␉digit = buff[i] - 55;␊ |
| 66 | ␉␉else if (buff[i] >= 97 && buff[i] <= 102)␉// 'a' through 'f'␊ |
| 67 | ␉␉␉digit = buff[i] - 87;␊ |
| 68 | ␉␉else␊ |
| 69 | ␉␉␉return value;␊ |
| 70 | ␉␉␊ |
| 71 | ␉␉value = digit + 16 * value;␊ |
| 72 | ␉}␊ |
| 73 | ␉return␉value;␊ |
| 74 | }␊ |
| 75 | ␊ |
| 76 | void *convertHexStr2Binary(const char *hexStr, int *outLength)␊ |
| 77 | {␊ |
| 78 | int len;␊ |
| 79 | char hexNibble;␊ |
| 80 | char hexByte[2];␊ |
| 81 | uint8_t binChar;␊ |
| 82 | uint8_t *binStr;␊ |
| 83 | int hexStrIdx, binStrIdx, hexNibbleIdx;␊ |
| 84 | ␊ |
| 85 | len = strlen(hexStr);␊ |
| 86 | if (len > 1)␊ |
| 87 | {␊ |
| 88 | // the resulting binary will be the half size of the input hex string␊ |
| 89 | binStr = malloc(len / 2);␊ |
| 90 | binStrIdx = 0;␊ |
| 91 | hexNibbleIdx = 0;␊ |
| 92 | for (hexStrIdx = 0; hexStrIdx < len; hexStrIdx++)␊ |
| 93 | {␊ |
| 94 | hexNibble = hexStr[hexStrIdx];␊ |
| 95 | ␊ |
| 96 | ␉// ignore all chars except valid hex numbers␊ |
| 97 | ␉if ( (hexNibble >= '0' && hexNibble <= '9') ||␊ |
| 98 | ␉␉(hexNibble >= 'A' && hexNibble <= 'F') ||␊ |
| 99 | ␉␉(hexNibble >= 'a' && hexNibble <= 'f') ) {␊ |
| 100 | hexByte[hexNibbleIdx++] = hexNibble;␊ |
| 101 | ␊ |
| 102 | // found both two nibbles, convert to binary␊ |
| 103 | if (hexNibbleIdx == 2)␊ |
| 104 | {␊ |
| 105 | binChar = 0;␊ |
| 106 | ␊ |
| 107 | for (hexNibbleIdx = 0; hexNibbleIdx < sizeof(hexByte); hexNibbleIdx++)␊ |
| 108 | {␊ |
| 109 | if (hexNibbleIdx > 0) binChar = binChar << 4;␊ |
| 110 | ␊ |
| 111 | if (hexByte[hexNibbleIdx] <= '9') binChar += hexByte[hexNibbleIdx] - '0';␊ |
| 112 | else if (hexByte[hexNibbleIdx] <= 'F') binChar += hexByte[hexNibbleIdx] - ('A' - 10);␊ |
| 113 | else if (hexByte[hexNibbleIdx] <= 'f') binChar += hexByte[hexNibbleIdx] - ('a' - 10);␊ |
| 114 | }␊ |
| 115 | ␊ |
| 116 | binStr[binStrIdx++] = binChar;␉␉␉␉␉␉␊ |
| 117 | hexNibbleIdx = 0;␊ |
| 118 | }␊ |
| 119 | }␊ |
| 120 | }␊ |
| 121 | *outLength = binStrIdx;␊ |
| 122 | return binStr;␊ |
| 123 | }␊ |
| 124 | else␊ |
| 125 | {␊ |
| 126 | *outLength = 0;␊ |
| 127 | return NULL;␊ |
| 128 | }␊ |
| 129 | }␊ |
| 130 | ␊ |
| 131 | // FIXME: can't use my original code here,␊ |
| 132 | // Ironically, trying to reuse convertHexStr2Binary() would RESET the system!␊ |
| 133 | /*␊ |
| 134 | static EFI_CHAR8* getUUIDFromString2(const char * szInUUID)␊ |
| 135 | {␊ |
| 136 | char szUUID[UUID_LEN+1], *p=szUUID;␊ |
| 137 | int size=0;␊ |
| 138 | void* ret;␊ |
| 139 | ␊ |
| 140 | if (!szInUUID || strlen(szInUUID)<UUID_LEN) return (EFI_CHAR8*) 0;␊ |
| 141 | ␊ |
| 142 | while(*szInUUID) if (*szInUUID!='-') *p++=*szInUUID++; else szInUUID++;␊ |
| 143 | *p='\0';␊ |
| 144 | ret = convertHexStr2Binary(szUUID, &size);␊ |
| 145 | if (!ret || size!=UUID_LEN) ␊ |
| 146 | {␊ |
| 147 | verbose("UUID: cannot convert string <%s> to valid UUID.\n", szUUID);␊ |
| 148 | return (EFI_CHAR8*) 0;␊ |
| 149 | }␊ |
| 150 | return (EFI_CHAR8*) ret; // new allocated buffer containing the converted string to bin␊ |
| 151 | }␊ |
| 152 | */␊ |
| 153 | |
