| 1 |
#include <stdlib.h> |
| 2 |
#include <string.h> |
| 3 |
#include <ctype.h> |
| 4 |
|
| 5 |
#include "gridmapdir.h" |
| 6 |
#include "fileutil.h" |
| 7 |
|
| 8 |
#define WHITESPACE_CHARS " \t\n" |
| 9 |
#define QUOTING_CHARS "\"" |
| 10 |
#define ESCAPING_CHARS "\\" |
| 11 |
#define COMMENT_CHARS "#" |
| 12 |
#define WILD_CHARS '*' |
| 13 |
#define DIGIT_CHARS "0123456789" |
| 14 |
#define USERID_SEP_CHARS "," |
| 15 |
#define USERID_TERMINATOR_CHARS USERID_SEP_CHARS WHITESPACE_CHARS |
| 16 |
#define NUL '\0' |
| 17 |
#define USERID_CHUNK_SIZE 4 |
| 18 |
|
| 19 |
|
| 20 |
/****************************************************************************** |
| 21 |
Function: gridmap_parse_line |
| 22 |
Description: |
| 23 |
Given a line from the gridmap file, parse it returning |
| 24 |
a gridmap_line_t structure. line is modified during parsing. |
| 25 |
|
| 26 |
The format of the line is expected to be: |
| 27 |
|
| 28 |
<DN> <userid>[,<userid>[,<userid>...]] |
| 29 |
|
| 30 |
Leading and trailing whitespace is ignored. |
| 31 |
|
| 32 |
userids must only have a comma between them, no whitespace. |
| 33 |
|
| 34 |
Anything after the userids is ignored. |
| 35 |
|
| 36 |
Anything after an unescaped comment character is ignored. |
| 37 |
|
| 38 |
Parameters: |
| 39 |
line, a pointer to the line from the file (NUL-terminated string) |
| 40 |
|
| 41 |
gline, a pointer to a pointer that will be set to point at |
| 42 |
the gridmap_line_t structure containing the line information. |
| 43 |
If the line contains no content, gline will be set to NULL. |
| 44 |
|
| 45 |
Returns: |
| 46 |
0 on success, non-zero on error. |
| 47 |
|
| 48 |
******************************************************************************/ |
| 49 |
static int gridmap_parse_line(char * line, gridmap_line_t ** gline); |
| 50 |
static int xdigit_to_value(char xdigit); |
| 51 |
static int gridmap_parse_globusid(const char * unparsed, char ** pparsed); |
| 52 |
static void gridmap_free_gridmap_line(gridmap_line_t *gline); |
| 53 |
static int match_dn(const char * dn, const char * match, unsigned short matching_type); |
| 54 |
|
| 55 |
static int match_dn(const char * match, const char * to_match, unsigned short matching_type) { |
| 56 |
if ( (matching_type&MATCH_WILD_CHARS) == MATCH_WILD_CHARS ){ |
| 57 |
return fnmatch(match, to_match, 0); |
| 58 |
} else { |
| 59 |
return strcmp(match, to_match); |
| 60 |
} |
| 61 |
} |
| 62 |
|
| 63 |
gridmap_line_t * find_mapping(const gridmap_list_t * list, const char * to_match, unsigned short matching_type) { |
| 64 |
const gridmap_list_t * current = list; |
| 65 |
while (current != NULL){ |
| 66 |
if (match_dn(current->line->match,to_match,matching_type) == 0) |
| 67 |
return current->line; |
| 68 |
current = current->next; |
| 69 |
if (current == list) |
| 70 |
break; |
| 71 |
} |
| 72 |
return NULL; |
| 73 |
} |
| 74 |
|
| 75 |
void gridmap_list_free(gridmap_list_t * list){ |
| 76 |
gridmap_list_t * current = list; |
| 77 |
gridmap_list_t * working = NULL; |
| 78 |
while (current != NULL){ |
| 79 |
working = current; |
| 80 |
current = current->next; |
| 81 |
|
| 82 |
gridmap_free_gridmap_line(working->line); |
| 83 |
free(working); |
| 84 |
} |
| 85 |
} |
| 86 |
|
| 87 |
int parse_gridmapfile(const char * image_map_file, gridmap_list_t ** list){ |
| 88 |
gridmap_list_t * result = NULL; |
| 89 |
gridmap_list_t * resultlast = NULL; |
| 90 |
gridmap_list_t * resultnew = NULL; |
| 91 |
gridmap_line_t * gline = NULL; |
| 92 |
char * contents = NULL; |
| 93 |
char * linestart = NULL; |
| 94 |
char * lineend = NULL; |
| 95 |
int eof = 0; |
| 96 |
int read; |
| 97 |
|
| 98 |
read = cgul_read_config(image_map_file, &contents, getuid(), getgid()); |
| 99 |
if (read != 0){ |
| 100 |
// EEF_log(LOG_ERR,"Unable to safely open the image map file '%s', reason: %d (for an explenation of the reason look in cgul/fileutil/fileutil.h)",image_map_file,read); |
| 101 |
goto failure; |
| 102 |
} |
| 103 |
|
| 104 |
linestart = contents; |
| 105 |
while (eof == 0){ |
| 106 |
lineend = linestart; |
| 107 |
while (*lineend != '\n'){ |
| 108 |
if (*lineend == '\0'){ |
| 109 |
eof = 1; |
| 110 |
break; |
| 111 |
} |
| 112 |
lineend++; |
| 113 |
} |
| 114 |
*lineend = '\0'; |
| 115 |
|
| 116 |
read = gridmap_parse_line(linestart, &gline); |
| 117 |
linestart = lineend+1; |
| 118 |
|
| 119 |
/* error which is unrecoverable only will result in a non 0 value */ |
| 120 |
if (read != 0) { |
| 121 |
goto failure; |
| 122 |
} |
| 123 |
|
| 124 |
/* line consisting of comment or whitespaces only */ |
| 125 |
if (gline == NULL) |
| 126 |
continue; |
| 127 |
|
| 128 |
resultnew = calloc(1,sizeof(gridmap_list_t)); |
| 129 |
resultnew->line = gline; |
| 130 |
|
| 131 |
if (result == NULL){ |
| 132 |
resultlast = result = resultnew; |
| 133 |
} else { |
| 134 |
resultlast->next = resultnew; |
| 135 |
resultlast = resultnew; |
| 136 |
} |
| 137 |
/* be sure to point the last result to the actual last result in the list */ |
| 138 |
while (resultlast->next != NULL) |
| 139 |
resultlast = resultlast->next; |
| 140 |
|
| 141 |
gline = NULL; |
| 142 |
resultnew = NULL; |
| 143 |
} |
| 144 |
|
| 145 |
*list = result; |
| 146 |
|
| 147 |
return 0; |
| 148 |
failure: |
| 149 |
gridmap_free_gridmap_line(gline); |
| 150 |
gline = NULL; |
| 151 |
|
| 152 |
free(contents); |
| 153 |
contents = NULL; |
| 154 |
|
| 155 |
gridmap_list_free(result); |
| 156 |
result = NULL; |
| 157 |
resultlast = NULL; |
| 158 |
|
| 159 |
return -1; |
| 160 |
} |
| 161 |
|
| 162 |
static int gridmap_parse_line(char * line, gridmap_line_t ** gline) { |
| 163 |
charlist_t * mappings = NULL; |
| 164 |
charlist_t * mappingsnew = NULL; |
| 165 |
char * dn_end; |
| 166 |
char * parsed_dn = NULL; |
| 167 |
gridmap_line_t * gline_tmp = NULL; |
| 168 |
|
| 169 |
|
| 170 |
/* Check arguments */ |
| 171 |
if ((line == NULL) || (gline == NULL)) |
| 172 |
goto error; |
| 173 |
|
| 174 |
/* Skip over leading whitespace */ |
| 175 |
line += strspn(line, WHITESPACE_CHARS); |
| 176 |
|
| 177 |
/* Check for comment at start of line and ignore line if present */ |
| 178 |
if (strchr(COMMENT_CHARS, *line) != NULL) { |
| 179 |
/* Ignore line, return NULL gline */ |
| 180 |
*gline = NULL; |
| 181 |
return 0; |
| 182 |
} |
| 183 |
|
| 184 |
/* Check for empty line */ |
| 185 |
if (*line == NUL) { |
| 186 |
/* Empty line, return NULL gline. */ |
| 187 |
*gline = NULL; |
| 188 |
return 0; |
| 189 |
} |
| 190 |
|
| 191 |
/* Is DN quoted? */ |
| 192 |
if (strchr(QUOTING_CHARS, *line) != NULL) { |
| 193 |
/* |
| 194 |
* Yes, skip over opening quote and look for unescaped |
| 195 |
* closing double quote |
| 196 |
*/ |
| 197 |
line++; |
| 198 |
dn_end = line; |
| 199 |
while (strchr(QUOTING_CHARS, *dn_end) == NULL){ |
| 200 |
if (strchr(ESCAPING_CHARS, *dn_end) != NULL) |
| 201 |
dn_end++; |
| 202 |
if (*dn_end == 0) |
| 203 |
goto error; |
| 204 |
dn_end++; |
| 205 |
} |
| 206 |
} else { |
| 207 |
/* No, just find next whitespace */ |
| 208 |
dn_end = line + strcspn(line, WHITESPACE_CHARS); |
| 209 |
|
| 210 |
if (*dn_end == NUL) |
| 211 |
goto error; /* Nothing after DN */ |
| 212 |
} |
| 213 |
|
| 214 |
/* NUL terminate DN and parse */ |
| 215 |
*dn_end = NUL; |
| 216 |
|
| 217 |
if (gridmap_parse_globusid(line, &parsed_dn) != 0) |
| 218 |
return -1; |
| 219 |
|
| 220 |
/* Skip over closing delim and any whitespace after DN */ |
| 221 |
line = dn_end + 1; |
| 222 |
line += strspn(line, WHITESPACE_CHARS); |
| 223 |
|
| 224 |
/* Parse list of unix user ID seperated by USERID_SEP_CHARS */ |
| 225 |
while ((*line != NUL) && (strchr(WHITESPACE_CHARS, *line) == NULL)) { |
| 226 |
int mapping_len; |
| 227 |
char * mapping; |
| 228 |
|
| 229 |
/* Find end of this userid */ |
| 230 |
mapping_len = strcspn(line, USERID_TERMINATOR_CHARS); |
| 231 |
|
| 232 |
mapping = strndup(line,mapping_len); |
| 233 |
if (mapping == NULL) |
| 234 |
goto error; |
| 235 |
|
| 236 |
mappingsnew = charlist_add_char_ptr_own(mappings, mapping); |
| 237 |
/* test for the memory beeing available */ |
| 238 |
if (mappingsnew == NULL){ |
| 239 |
/* free the local char ptr */ |
| 240 |
free(mapping); |
| 241 |
|
| 242 |
goto error; |
| 243 |
} |
| 244 |
|
| 245 |
mappings = mappingsnew; |
| 246 |
|
| 247 |
line += mapping_len; |
| 248 |
|
| 249 |
/* If we're on a seperator character, skip over it */ |
| 250 |
if (strchr(USERID_SEP_CHARS, *line) != NULL) |
| 251 |
line++; |
| 252 |
} |
| 253 |
|
| 254 |
/* |
| 255 |
* There might be more stuff on the line, but we're ignoring |
| 256 |
* it for now. |
| 257 |
*/ |
| 258 |
|
| 259 |
/* Ok, build our gridmap_line_t structure */ |
| 260 |
gline_tmp = malloc(sizeof(*gline_tmp)); |
| 261 |
|
| 262 |
if (gline_tmp == NULL) |
| 263 |
goto error; |
| 264 |
|
| 265 |
gline_tmp->match = parsed_dn; |
| 266 |
gline_tmp->mappings = mappings; |
| 267 |
|
| 268 |
*gline = gline_tmp; |
| 269 |
|
| 270 |
return 0; |
| 271 |
|
| 272 |
error: |
| 273 |
free(parsed_dn); |
| 274 |
parsed_dn = NULL; |
| 275 |
|
| 276 |
charlist_free(mappings); |
| 277 |
|
| 278 |
free(gline_tmp); |
| 279 |
|
| 280 |
return -1; |
| 281 |
|
| 282 |
} /* gridmap_parse_line() */ |
| 283 |
|
| 284 |
/****************************************************************************** |
| 285 |
Function: gridmap_parse_globusid |
| 286 |
Description: |
| 287 |
Given a pointer to a string containing the globusid from the |
| 288 |
gridmap file, return a pointer to a string containing the |
| 289 |
parsed from of the id. |
| 290 |
|
| 291 |
Specifically handle backslashed characters - e.g. '\\', |
| 292 |
'\x4a' or '\37'. |
| 293 |
|
| 294 |
Parameters: |
| 295 |
unparsed, pointer to unparsed string |
| 296 |
|
| 297 |
pparsed, pointer to pointer that should be set to point at |
| 298 |
allocated parsed string |
| 299 |
|
| 300 |
Returns: |
| 301 |
0 on success |
| 302 |
non-zero on error. |
| 303 |
|
| 304 |
******************************************************************************/ |
| 305 |
static int gridmap_parse_globusid(const char * unparsed, char ** pparsed) { |
| 306 |
int escaped = 0; /* Is the current character escaped? (Previous char was backslash) */ |
| 307 |
char * buffer = NULL; /* Buffer we are putting resulting name into */ |
| 308 |
int buffer_len = 0; /* Buffer's length in bytes */ |
| 309 |
int buffer_index = 0; /* And our current position in buffer */ |
| 310 |
char unparsed_char; /* Character we're currently looking at */ |
| 311 |
|
| 312 |
|
| 313 |
/* Check input parameters for legality */ |
| 314 |
if ((unparsed == NULL) || (pparsed == NULL)) |
| 315 |
return -1; |
| 316 |
|
| 317 |
buffer_len = strlen(unparsed); |
| 318 |
buffer = malloc(buffer_len); |
| 319 |
if (buffer == NULL) |
| 320 |
return -1; |
| 321 |
|
| 322 |
/* Walk through the name, parsing as we go */ |
| 323 |
while ((unparsed_char = *(unparsed++)) != NUL){ |
| 324 |
/* Unescaped backslash */ |
| 325 |
if (strchr(ESCAPING_CHARS, unparsed_char) && !escaped) { |
| 326 |
escaped = 1; |
| 327 |
continue; |
| 328 |
} |
| 329 |
|
| 330 |
/* Escaped hex character - e.g. '\xfe' */ |
| 331 |
if ((unparsed_char == 'x') && escaped) { |
| 332 |
if (isxdigit(*unparsed) && isxdigit(*(unparsed + 1))) { |
| 333 |
/* Set unparsed_char to value represented by hex value */ |
| 334 |
unparsed_char = (xdigit_to_value(*unparsed) << 4) + xdigit_to_value(*(unparsed + 1)); |
| 335 |
unparsed += 2; |
| 336 |
} |
| 337 |
/* else just fall through */ |
| 338 |
} |
| 339 |
|
| 340 |
/* |
| 341 |
* Ok, we now have the character in unparsed_char to be appended |
| 342 |
* to our output string. |
| 343 |
* |
| 344 |
* First, make sure we have enough room in our output buffer. |
| 345 |
*/ |
| 346 |
if ((buffer_index + 1 /* for NUL */) >= buffer_len) { |
| 347 |
/* Grow buffer */ |
| 348 |
char *tmp_buffer; |
| 349 |
buffer_len *= 2; |
| 350 |
tmp_buffer = realloc(buffer, buffer_len); |
| 351 |
if (tmp_buffer == NULL) { |
| 352 |
free(buffer); |
| 353 |
return -1; |
| 354 |
} |
| 355 |
buffer = tmp_buffer; |
| 356 |
} |
| 357 |
|
| 358 |
buffer[buffer_index++] = unparsed_char; |
| 359 |
buffer[buffer_index] = NUL; |
| 360 |
|
| 361 |
escaped = 0; |
| 362 |
} |
| 363 |
|
| 364 |
/* XXX What if escaped == 1 here? */ |
| 365 |
/* Success */ |
| 366 |
|
| 367 |
*pparsed = buffer; |
| 368 |
|
| 369 |
return 0; |
| 370 |
|
| 371 |
} /* gridmap_parse_globusid() */ |
| 372 |
|
| 373 |
/****************************************************************************** |
| 374 |
Function: xdigit_to_value |
| 375 |
Description: |
| 376 |
Convert a ascii character representing a hexadecimal digit |
| 377 |
into a integer. |
| 378 |
|
| 379 |
Parameters: |
| 380 |
xdigit, character contain the hex digit. |
| 381 |
|
| 382 |
Returns: |
| 383 |
value contained in xdigit, or -1 on error. |
| 384 |
|
| 385 |
******************************************************************************/ |
| 386 |
|
| 387 |
static int xdigit_to_value(char xdigit) { |
| 388 |
if ((xdigit >= '0') && (xdigit <= '9')) |
| 389 |
return (xdigit - '0'); |
| 390 |
if ((xdigit >= 'a') && (xdigit <= 'f')) |
| 391 |
return (xdigit - 'a' + 0xa); |
| 392 |
if ((xdigit >= 'A') && (xdigit <= 'F')) |
| 393 |
return (xdigit - 'A' + 0xa); |
| 394 |
/* Illegal digit */ |
| 395 |
return -1; |
| 396 |
} /* xdigit_to_value() */ |
| 397 |
|
| 398 |
/****************************************************************************** |
| 399 |
Function: gridmap_free_gridmap_line |
| 400 |
Description: |
| 401 |
Frees all memory allocated to a gridmap_line_t structure. |
| 402 |
|
| 403 |
Parameters: |
| 404 |
gline, pointer to structure to be freed. |
| 405 |
|
| 406 |
Returns: |
| 407 |
Nothing. |
| 408 |
******************************************************************************/ |
| 409 |
static void gridmap_free_gridmap_line(gridmap_line_t *gline) { |
| 410 |
if (gline == NULL) |
| 411 |
return; |
| 412 |
|
| 413 |
free(gline->match); |
| 414 |
gline->match = NULL; |
| 415 |
|
| 416 |
charlist_free(gline->mappings); |
| 417 |
gline->mappings = NULL; |
| 418 |
|
| 419 |
free(gline); |
| 420 |
} /* gridmap_free_gridmap_line() */ |
| 421 |
|
| 422 |
void charlist_free(charlist_t * list){ |
| 423 |
charlist_t * current = list; |
| 424 |
charlist_t * working; |
| 425 |
while (current != NULL){ |
| 426 |
working = current; |
| 427 |
current = current->next; |
| 428 |
|
| 429 |
/* clean the element */ |
| 430 |
free(working->value); |
| 431 |
free(working); |
| 432 |
working = NULL; |
| 433 |
|
| 434 |
if (current == list) |
| 435 |
/* it accidantly is circular so break out of it as I already cleaned it up */ |
| 436 |
break; |
| 437 |
} |
| 438 |
} |
| 439 |
|
| 440 |
charlist_t * charlist_add_char_ptr_own(charlist_t * list, const char * str){ |
| 441 |
charlist_t * working = list; |
| 442 |
charlist_t * last = NULL; |
| 443 |
if (working == NULL){ |
| 444 |
last = working = calloc(1,sizeof(charlist_t)); |
| 445 |
} else { |
| 446 |
last = working; |
| 447 |
while (last->next != NULL){ |
| 448 |
/* it is a circular list, now you found the last one */ |
| 449 |
if (last->next == working) |
| 450 |
break; |
| 451 |
last = last->next; |
| 452 |
} |
| 453 |
last->next = calloc(1,sizeof(charlist_t)); |
| 454 |
last = last->next; |
| 455 |
} |
| 456 |
|
| 457 |
if (last == NULL) |
| 458 |
return NULL; |
| 459 |
|
| 460 |
last->value = str; |
| 461 |
return working; |
| 462 |
} |
| 463 |
|
| 464 |
charlist_t * charlist_add_char_ptr_owned(charlist_t * list, const char * str) { |
| 465 |
char * mystr = strdup(str); |
| 466 |
if (mystr == NULL) |
| 467 |
return NULL; |
| 468 |
return charlist_add_char_ptr_own(list, mystr); |
| 469 |
} |
| 470 |
|
| 471 |
int main(int argc, char* argv[]){ |
| 472 |
char* gridmapfile = "/home/aczid/workspace/grid-mw-security/ees/examples/example_gridmapfile.txt"; |
| 473 |
|
| 474 |
} |
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