| 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 | /** convert URL to a string */␊ |
| 11 | char * newStringFromURL(char* string)␊ |
| 12 | { ␊ |
| 13 | ␉char * buffer = newString(string);␊ |
| 14 | ␉␊ |
| 15 | ␉int maxlen = strlen(buffer);␉␊ |
| 16 | ␉␊ |
| 17 | ␉// replace "%20" by spaces.␊ |
| 18 | ␉int len = 0;␊ |
| 19 | ␉while (buffer[len] != '\0') {␊ |
| 20 | ␉␉if (buffer[len] == '%' && buffer[len+1] == '2' && buffer[len+2] == '0')␊ |
| 21 | ␉␉{␊ |
| 22 | ␉␉␉buffer[len] = ' ';␊ |
| 23 | ␉␉␉␊ |
| 24 | ␉␉␉strlcpy(&buffer[len+1], &buffer[len+3], maxlen - (len+1)); ␉␉␉␊ |
| 25 | ␉␉}␊ |
| 26 | ␉␉len++;␊ |
| 27 | ␉}␊ |
| 28 | ␉␊ |
| 29 | ␉//DBG("%s maxlen : %d, newlen : %lu\n",buffer, maxlen, strlen(buffer));␊ |
| 30 | ␉// This will leak a little bit, i mean as you can see the final string will be slightly smaller than the allocated string buffer, ␊ |
| 31 | ␉// to fix this you can realloc the buffer, or do another newString(xxx) then free the first buffer, i choose to do nothing.␊ |
| 32 | ␉␊ |
| 33 | return buffer ;␊ |
| 34 | }␊ |
| 35 | ␊ |
| 36 | /** Transform a 16 bytes hexadecimal value UUID to a string */␊ |
| 37 | const char * getStringFromUUID(const EFI_CHAR8* eUUID)␊ |
| 38 | {␊ |
| 39 | static char msg[UUID_STR_LEN] = "";␊ |
| 40 | if (!eUUID) return "";␊ |
| 41 | const unsigned char * uuid = (unsigned char*) eUUID;␊ |
| 42 | snprintf(msg, sizeof(msg), "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",␊ |
| 43 | ␉␉ uuid[0], uuid[1], uuid[2], uuid[3], ␊ |
| 44 | ␉␉ uuid[4], uuid[5], uuid[6], uuid[7],␊ |
| 45 | ␉␉ uuid[8], uuid[9], uuid[10],uuid[11],␊ |
| 46 | ␉␉ uuid[12],uuid[13],uuid[14],uuid[15]);␊ |
| 47 | return msg ;␊ |
| 48 | }␊ |
| 49 | ␊ |
| 50 | /** Parse an UUID string into an (EFI_CHAR8*) buffer */␊ |
| 51 | EFI_CHAR8* getUUIDFromString(const char *source)␊ |
| 52 | {␊ |
| 53 | if (!source) return 0;␊ |
| 54 | ␊ |
| 55 | ␉char␉*p = (char *)source;␊ |
| 56 | ␉int␉i;␊ |
| 57 | ␉char␉buf[3];␊ |
| 58 | ␉static EFI_CHAR8 uuid[UUID_LEN+1]="";␊ |
| 59 | ␊ |
| 60 | ␉buf[2] = '\0';␊ |
| 61 | ␉for (i=0; i<UUID_LEN; i++) {␊ |
| 62 | ␉␉if (p[0] == '\0' || p[1] == '\0' || !isxdigit(p[0]) || !isxdigit(p[1])) {␊ |
| 63 | ␉␉␉verbose("[ERROR] UUID='%s' syntax error\n", source);␊ |
| 64 | ␉␉␉return 0;␊ |
| 65 | ␉␉}␊ |
| 66 | ␉␉buf[0] = *p++;␊ |
| 67 | ␉␉buf[1] = *p++;␊ |
| 68 | ␉␉uuid[i] = (unsigned char) strtoul(buf, NULL, 16);␊ |
| 69 | ␉␉if (*p == '-' && (i % 2) == 1 && i < UUID_LEN - 1) {␊ |
| 70 | ␉␉␉p++;␊ |
| 71 | ␉␉}␊ |
| 72 | ␉}␊ |
| 73 | ␉uuid[UUID_LEN]='\0';␊ |
| 74 | ␊ |
| 75 | ␉if (*p != '\0') {␊ |
| 76 | ␉␉verbose("[ERROR] UUID='%s' syntax error\n", source);␊ |
| 77 | ␉␉return 0;␊ |
| 78 | ␉}␊ |
| 79 | ␉return uuid;␊ |
| 80 | }␊ |
| 81 | ␊ |
| 82 | void *convertHexStr2Binary(const char *hexStr, int *outLength)␊ |
| 83 | {␊ |
| 84 | int len;␊ |
| 85 | char hexNibble;␊ |
| 86 | char hexByte[2];␊ |
| 87 | uint8_t binChar;␊ |
| 88 | uint8_t *binStr;␊ |
| 89 | int hexStrIdx, binStrIdx, hexNibbleIdx;␊ |
| 90 | ␊ |
| 91 | len = strlen(hexStr);␊ |
| 92 | if (len > 1)␊ |
| 93 | {␊ |
| 94 | // the resulting binary will be the half size of the input hex string␊ |
| 95 | binStr = malloc(len / 2);␊ |
| 96 | if (!binStr) goto out;␊ |
| 97 | binStrIdx = 0;␊ |
| 98 | hexNibbleIdx = 0;␊ |
| 99 | for (hexStrIdx = 0; hexStrIdx < len; hexStrIdx++)␊ |
| 100 | {␊ |
| 101 | hexNibble = hexStr[hexStrIdx];␊ |
| 102 | ␊ |
| 103 | // ignore all chars except valid hex numbers␊ |
| 104 | if ((hexNibble >= '0' && hexNibble <= '9')␊ |
| 105 | || (hexNibble >= 'A' && hexNibble <= 'F')␊ |
| 106 | || (hexNibble >= 'a' && hexNibble <= 'f'))␊ |
| 107 | {␊ |
| 108 | hexByte[hexNibbleIdx++] = hexNibble;␊ |
| 109 | ␊ |
| 110 | // found both two nibbles, convert to binary␊ |
| 111 | if (hexNibbleIdx == 2)␊ |
| 112 | {␊ |
| 113 | binChar = 0;␊ |
| 114 | ␊ |
| 115 | for (hexNibbleIdx = 0; (unsigned)hexNibbleIdx < sizeof(hexByte); hexNibbleIdx++)␊ |
| 116 | {␊ |
| 117 | if (hexNibbleIdx > 0) binChar = binChar << 4;␊ |
| 118 | ␊ |
| 119 | if (hexByte[hexNibbleIdx] <= '9') binChar += hexByte[hexNibbleIdx] - '0';␊ |
| 120 | else if (hexByte[hexNibbleIdx] <= 'F') binChar += hexByte[hexNibbleIdx] - ('A' - 10);␊ |
| 121 | else if (hexByte[hexNibbleIdx] <= 'f') binChar += hexByte[hexNibbleIdx] - ('a' - 10);␊ |
| 122 | }␊ |
| 123 | ␊ |
| 124 | binStr[binStrIdx++] = binChar;␉␉␉␉␉␉␊ |
| 125 | hexNibbleIdx = 0;␊ |
| 126 | }␊ |
| 127 | }␊ |
| 128 | }␊ |
| 129 | *outLength = binStrIdx;␊ |
| 130 | return binStr;␊ |
| 131 | }␊ |
| 132 | ␊ |
| 133 | out:␊ |
| 134 | ␉*outLength = 0; ␊ |
| 135 | return NULL;␊ |
| 136 | ␊ |
| 137 | } |
