Mercurial > trustbridge
comparison ui/listutil.c @ 4:9849250f50f2
Start implementation of certificatelist parser
| author | Andre Heinecke <aheinecke@intevation.de> |
|---|---|
| date | Tue, 11 Feb 2014 16:46:02 +0000 |
| parents | |
| children | 992c0ec57660 |
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| 3:b684e25adbbb | 4:9849250f50f2 |
|---|---|
| 1 #include "listutil.h" | |
| 2 | |
| 3 #include <stdio.h> | |
| 4 #include <stdlib.h> | |
| 5 #include <errno.h> | |
| 6 #include <fcntl.h> | |
| 7 #include <unistd.h> | |
| 8 #include <sys/types.h> | |
| 9 #include <sys/stat.h> | |
| 10 | |
| 11 #define MAX_FILESIZE_KB 1024 | |
| 12 | |
| 13 void handle_errno() | |
| 14 { | |
| 15 printf("Error: %s \n", strerror(errno)); | |
| 16 } | |
| 17 | |
| 18 list_status_t readList(char *fileName, void *data, size_t *size) | |
| 19 { | |
| 20 int fd = -1; | |
| 21 struct stat fileStat; | |
| 22 int rc = 0; | |
| 23 ssize_t bRead = 0; | |
| 24 list_status_t retval = UnknownError; | |
| 25 | |
| 26 fd = open(fileName, O_RDONLY); | |
| 27 if (fd == -1) { | |
| 28 handle_errno(); | |
| 29 retval = StatFailed; | |
| 30 goto failure; | |
| 31 } | |
| 32 | |
| 33 rc = fstat(fd, &fileStat); | |
| 34 if (rc < 0) { | |
| 35 printf ("Stat failed with rc: %i\n", rc); | |
| 36 retval = StatFailed; | |
| 37 goto failure; | |
| 38 } | |
| 39 | |
| 40 // Check the size of the file | |
| 41 if (fileStat.st_size) { | |
| 42 printf("Size zero\n"); | |
| 43 retval = StatFailed; | |
| 44 goto failure; | |
| 45 } | |
| 46 | |
| 47 if (fileStat.st_size / 1024 > MAX_FILESIZE_KB || | |
| 48 fileStat.st_size >= (size_t)-1) { | |
| 49 printf("File too large\n"); | |
| 50 retval = TooLarge; | |
| 51 goto failure; | |
| 52 } | |
| 53 | |
| 54 // We can cast here as we already checked | |
| 55 // that this size is not too large for size_t | |
| 56 *size = (size_t) fileStat.st_size; | |
| 57 | |
| 58 data = malloc(*size); | |
| 59 | |
| 60 if (data == NULL) { | |
| 61 printf("Malloc failed\n"); | |
| 62 retval = UnknownError; | |
| 63 goto failure; | |
| 64 } | |
| 65 | |
| 66 bRead = read(fd, data, *size); | |
| 67 | |
| 68 if (bRead != *size) { | |
| 69 printf("Read failed"); | |
| 70 if (bRead == -1) { | |
| 71 handle_errno(); | |
| 72 } | |
| 73 retval = UnknownError; | |
| 74 *size = 0; | |
| 75 if (data) { | |
| 76 free(data); | |
| 77 data = NULL; | |
| 78 } | |
| 79 goto failure; | |
| 80 } | |
| 81 | |
| 82 retval = Unknown; | |
| 83 failure: | |
| 84 | |
| 85 if (fd && fd != -1) { | |
| 86 close(fd); | |
| 87 fd = -1; | |
| 88 } | |
| 89 | |
| 90 return retval; | |
| 91 } | |
| 92 | |
| 93 list_status_t readAndVerifyList(char *fileName, void *data, size_t *size) | |
| 94 { | |
| 95 int validSig = 0; | |
| 96 char * firstChar = NULL; | |
| 97 int i = 0; | |
| 98 | |
| 99 list_status_t retval = UnknownError; | |
| 100 data = NULL; | |
| 101 size = NULL; | |
| 102 | |
| 103 retval = readList(fileName, data, size); | |
| 104 | |
| 105 if (retval != Unknown) { | |
| 106 return retval; | |
| 107 } | |
| 108 | |
| 109 if (!data || !size) { | |
| 110 // should not have happend if readList works as specified | |
| 111 return UnknownError; | |
| 112 } | |
| 113 | |
| 114 firstChar = (char*) data; | |
| 115 | |
| 116 if (*firstChar != 'S') { | |
| 117 printf("Does not start with S\n"); | |
| 118 retval = InvalidFormat; | |
| 119 } | |
| 120 | |
| 121 for (i=0; i < *size; i++) { | |
| 122 printf("%c", firstChar + i); | |
| 123 } | |
| 124 | |
| 125 failure: | |
| 126 if (retval != Valid && data) { | |
| 127 free(data); | |
| 128 data = NULL; | |
| 129 *size = 0; | |
| 130 } | |
| 131 return retval; | |
| 132 } | |
| 133 |