Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/bio/bss_file.c */ |
| 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This package is an SSL implementation written |
| 6 | * by Eric Young (eay@cryptsoft.com). |
| 7 | * The implementation was written so as to conform with Netscapes SSL. |
| 8 | * |
| 9 | * This library is free for commercial and non-commercial use as long as |
| 10 | * the following conditions are aheared to. The following conditions |
| 11 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 13 | * included with this distribution is covered by the same copyright terms |
| 14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| 15 | * |
| 16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 17 | * the code are not to be removed. |
| 18 | * If this package is used in a product, Eric Young should be given attribution |
| 19 | * as the author of the parts of the library used. |
| 20 | * This can be in the form of a textual message at program startup or |
| 21 | * in documentation (online or textual) provided with the package. |
| 22 | * |
| 23 | * Redistribution and use in source and binary forms, with or without |
| 24 | * modification, are permitted provided that the following conditions |
| 25 | * are met: |
| 26 | * 1. Redistributions of source code must retain the copyright |
| 27 | * notice, this list of conditions and the following disclaimer. |
| 28 | * 2. Redistributions in binary form must reproduce the above copyright |
| 29 | * notice, this list of conditions and the following disclaimer in the |
| 30 | * documentation and/or other materials provided with the distribution. |
| 31 | * 3. All advertising materials mentioning features or use of this software |
| 32 | * must display the following acknowledgement: |
| 33 | * "This product includes cryptographic software written by |
| 34 | * Eric Young (eay@cryptsoft.com)" |
| 35 | * The word 'cryptographic' can be left out if the rouines from the library |
| 36 | * being used are not cryptographic related :-). |
| 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 38 | * the apps directory (application code) you must include an acknowledgement: |
| 39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 40 | * |
| 41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 51 | * SUCH DAMAGE. |
| 52 | * |
| 53 | * The licence and distribution terms for any publically available version or |
| 54 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 55 | * copied and put under another distribution licence |
| 56 | * [including the GNU Public Licence.] |
| 57 | */ |
| 58 | |
| 59 | /* |
| 60 | * 03-Dec-1997 rdenny@dc3.com Fix bug preventing use of stdin/stdout |
| 61 | * with binary data (e.g. asn1parse -inform DER < xxx) under |
| 62 | * Windows |
| 63 | */ |
| 64 | |
| 65 | #ifndef HEADER_BSS_FILE_C |
| 66 | #define HEADER_BSS_FILE_C |
| 67 | |
| 68 | #if defined(__linux) || defined(__sun) || defined(__hpux) |
| 69 | /* Following definition aliases fopen to fopen64 on above mentioned |
| 70 | * platforms. This makes it possible to open and sequentially access |
| 71 | * files larger than 2GB from 32-bit application. It does not allow to |
| 72 | * traverse them beyond 2GB with fseek/ftell, but on the other hand *no* |
| 73 | * 32-bit platform permits that, not with fseek/ftell. Not to mention |
| 74 | * that breaking 2GB limit for seeking would require surgery to *our* |
| 75 | * API. But sequential access suffices for practical cases when you |
| 76 | * can run into large files, such as fingerprinting, so we can let API |
| 77 | * alone. For reference, the list of 32-bit platforms which allow for |
| 78 | * sequential access of large files without extra "magic" comprise *BSD, |
| 79 | * Darwin, IRIX... |
| 80 | */ |
| 81 | #ifndef _FILE_OFFSET_BITS |
| 82 | #define _FILE_OFFSET_BITS 64 |
| 83 | #endif |
| 84 | #endif |
| 85 | |
| 86 | #include <stdio.h> |
| 87 | #include <errno.h> |
| 88 | #include "cryptlib.h" |
| 89 | #include "bio_lcl.h" |
| 90 | #include <openssl/err.h> |
| 91 | |
| 92 | #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB) |
| 93 | #include <nwfileio.h> |
| 94 | #endif |
| 95 | |
| 96 | #if !defined(OPENSSL_NO_STDIO) |
| 97 | |
| 98 | static int MS_CALLBACK file_write(BIO *h, const char *buf, int num); |
| 99 | static int MS_CALLBACK file_read(BIO *h, char *buf, int size); |
| 100 | static int MS_CALLBACK file_puts(BIO *h, const char *str); |
| 101 | static int MS_CALLBACK file_gets(BIO *h, char *str, int size); |
| 102 | static long MS_CALLBACK file_ctrl(BIO *h, int cmd, long arg1, void *arg2); |
| 103 | static int MS_CALLBACK file_new(BIO *h); |
| 104 | static int MS_CALLBACK file_free(BIO *data); |
| 105 | static BIO_METHOD methods_filep= |
| 106 | { |
| 107 | BIO_TYPE_FILE, |
| 108 | "FILE pointer", |
| 109 | file_write, |
| 110 | file_read, |
| 111 | file_puts, |
| 112 | file_gets, |
| 113 | file_ctrl, |
| 114 | file_new, |
| 115 | file_free, |
| 116 | NULL, |
| 117 | }; |
| 118 | |
| 119 | BIO *BIO_new_file(const char *filename, const char *mode) |
| 120 | { |
| 121 | BIO *ret; |
| 122 | FILE *file=NULL; |
| 123 | |
| 124 | #if defined(_WIN32) && defined(CP_UTF8) |
| 125 | int sz, len_0 = (int)strlen(filename)+1; |
| 126 | DWORD flags; |
| 127 | |
| 128 | /* |
| 129 | * Basically there are three cases to cover: a) filename is |
| 130 | * pure ASCII string; b) actual UTF-8 encoded string and |
| 131 | * c) locale-ized string, i.e. one containing 8-bit |
| 132 | * characters that are meaningful in current system locale. |
| 133 | * If filename is pure ASCII or real UTF-8 encoded string, |
| 134 | * MultiByteToWideChar succeeds and _wfopen works. If |
| 135 | * filename is locale-ized string, chances are that |
| 136 | * MultiByteToWideChar fails reporting |
| 137 | * ERROR_NO_UNICODE_TRANSLATION, in which case we fall |
| 138 | * back to fopen... |
| 139 | */ |
| 140 | if ((sz=MultiByteToWideChar(CP_UTF8,(flags=MB_ERR_INVALID_CHARS), |
| 141 | filename,len_0,NULL,0))>0 || |
| 142 | (GetLastError()==ERROR_INVALID_FLAGS && |
| 143 | (sz=MultiByteToWideChar(CP_UTF8,(flags=0), |
| 144 | filename,len_0,NULL,0))>0) |
| 145 | ) |
| 146 | { |
| 147 | WCHAR wmode[8]; |
| 148 | WCHAR *wfilename = _alloca(sz*sizeof(WCHAR)); |
| 149 | |
| 150 | if (MultiByteToWideChar(CP_UTF8,flags, |
| 151 | filename,len_0,wfilename,sz) && |
| 152 | MultiByteToWideChar(CP_UTF8,0,mode,strlen(mode)+1, |
| 153 | wmode,sizeof(wmode)/sizeof(wmode[0])) && |
| 154 | (file=_wfopen(wfilename,wmode))==NULL && |
| 155 | (errno==ENOENT || errno==EBADF) |
| 156 | ) /* UTF-8 decode succeeded, but no file, filename |
| 157 | * could still have been locale-ized... */ |
| 158 | file = fopen(filename,mode); |
| 159 | } |
| 160 | else if (GetLastError()==ERROR_NO_UNICODE_TRANSLATION) |
| 161 | { |
| 162 | file = fopen(filename,mode); |
| 163 | } |
| 164 | #else |
| 165 | file=fopen(filename,mode); |
| 166 | #endif |
| 167 | if (file == NULL) |
| 168 | { |
| 169 | SYSerr(SYS_F_FOPEN,get_last_sys_error()); |
| 170 | ERR_add_error_data(5,"fopen('",filename,"','",mode,"')"); |
| 171 | if (errno == ENOENT) |
| 172 | BIOerr(BIO_F_BIO_NEW_FILE,BIO_R_NO_SUCH_FILE); |
| 173 | else |
| 174 | BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB); |
| 175 | return(NULL); |
| 176 | } |
| 177 | if ((ret=BIO_new(BIO_s_file())) == NULL) |
| 178 | { |
| 179 | fclose(file); |
| 180 | return(NULL); |
| 181 | } |
| 182 | |
| 183 | BIO_clear_flags(ret,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */ |
| 184 | BIO_set_fp(ret,file,BIO_CLOSE); |
| 185 | return(ret); |
| 186 | } |
| 187 | |
| 188 | BIO *BIO_new_fp(FILE *stream, int close_flag) |
| 189 | { |
| 190 | BIO *ret; |
| 191 | |
| 192 | if ((ret=BIO_new(BIO_s_file())) == NULL) |
| 193 | return(NULL); |
| 194 | |
| 195 | BIO_set_flags(ret,BIO_FLAGS_UPLINK); /* redundant, left for documentation puposes */ |
| 196 | BIO_set_fp(ret,stream,close_flag); |
| 197 | return(ret); |
| 198 | } |
| 199 | |
| 200 | BIO_METHOD *BIO_s_file(void) |
| 201 | { |
| 202 | return(&methods_filep); |
| 203 | } |
| 204 | |
| 205 | static int MS_CALLBACK file_new(BIO *bi) |
| 206 | { |
| 207 | bi->init=0; |
| 208 | bi->num=0; |
| 209 | bi->ptr=NULL; |
| 210 | bi->flags=BIO_FLAGS_UPLINK; /* default to UPLINK */ |
| 211 | return(1); |
| 212 | } |
| 213 | |
| 214 | static int MS_CALLBACK file_free(BIO *a) |
| 215 | { |
| 216 | if (a == NULL) return(0); |
| 217 | if (a->shutdown) |
| 218 | { |
| 219 | if ((a->init) && (a->ptr != NULL)) |
| 220 | { |
| 221 | if (a->flags&BIO_FLAGS_UPLINK) |
| 222 | UP_fclose (a->ptr); |
| 223 | else |
| 224 | fclose (a->ptr); |
| 225 | a->ptr=NULL; |
| 226 | a->flags=BIO_FLAGS_UPLINK; |
| 227 | } |
| 228 | a->init=0; |
| 229 | } |
| 230 | return(1); |
| 231 | } |
| 232 | |
| 233 | static int MS_CALLBACK file_read(BIO *b, char *out, int outl) |
| 234 | { |
| 235 | int ret=0; |
| 236 | |
| 237 | if (b->init && (out != NULL)) |
| 238 | { |
| 239 | if (b->flags&BIO_FLAGS_UPLINK) |
| 240 | ret=UP_fread(out,1,(int)outl,b->ptr); |
| 241 | else |
| 242 | ret=fread(out,1,(int)outl,(FILE *)b->ptr); |
| 243 | if(ret == 0 && (b->flags&BIO_FLAGS_UPLINK)?UP_ferror((FILE *)b->ptr):ferror((FILE *)b->ptr)) |
| 244 | { |
| 245 | SYSerr(SYS_F_FREAD,get_last_sys_error()); |
| 246 | BIOerr(BIO_F_FILE_READ,ERR_R_SYS_LIB); |
| 247 | ret=-1; |
| 248 | } |
| 249 | } |
| 250 | return(ret); |
| 251 | } |
| 252 | |
| 253 | static int MS_CALLBACK file_write(BIO *b, const char *in, int inl) |
| 254 | { |
| 255 | int ret=0; |
| 256 | |
| 257 | if (b->init && (in != NULL)) |
| 258 | { |
| 259 | if (b->flags&BIO_FLAGS_UPLINK) |
| 260 | ret=UP_fwrite(in,(int)inl,1,b->ptr); |
| 261 | else |
| 262 | ret=fwrite(in,(int)inl,1,(FILE *)b->ptr); |
| 263 | if (ret) |
| 264 | ret=inl; |
| 265 | /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */ |
| 266 | /* according to Tim Hudson <tjh@cryptsoft.com>, the commented |
| 267 | * out version above can cause 'inl' write calls under |
| 268 | * some stupid stdio implementations (VMS) */ |
| 269 | } |
| 270 | return(ret); |
| 271 | } |
| 272 | |
| 273 | static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, void *ptr) |
| 274 | { |
| 275 | long ret=1; |
| 276 | FILE *fp=(FILE *)b->ptr; |
| 277 | FILE **fpp; |
| 278 | char p[4]; |
| 279 | |
| 280 | switch (cmd) |
| 281 | { |
| 282 | case BIO_C_FILE_SEEK: |
| 283 | case BIO_CTRL_RESET: |
| 284 | if (b->flags&BIO_FLAGS_UPLINK) |
| 285 | ret=(long)UP_fseek(b->ptr,num,0); |
| 286 | else |
| 287 | ret=(long)fseek(fp,num,0); |
| 288 | break; |
| 289 | case BIO_CTRL_EOF: |
| 290 | if (b->flags&BIO_FLAGS_UPLINK) |
| 291 | ret=(long)UP_feof(fp); |
| 292 | else |
| 293 | ret=(long)feof(fp); |
| 294 | break; |
| 295 | case BIO_C_FILE_TELL: |
| 296 | case BIO_CTRL_INFO: |
| 297 | if (b->flags&BIO_FLAGS_UPLINK) |
| 298 | ret=UP_ftell(b->ptr); |
| 299 | else |
| 300 | ret=ftell(fp); |
| 301 | break; |
| 302 | case BIO_C_SET_FILE_PTR: |
| 303 | file_free(b); |
| 304 | b->shutdown=(int)num&BIO_CLOSE; |
| 305 | b->ptr=ptr; |
| 306 | b->init=1; |
| 307 | #if BIO_FLAGS_UPLINK!=0 |
| 308 | #if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES) |
| 309 | #define _IOB_ENTRIES 20 |
| 310 | #endif |
| 311 | #if defined(_IOB_ENTRIES) |
| 312 | /* Safety net to catch purely internal BIO_set_fp calls */ |
| 313 | if ((size_t)ptr >= (size_t)stdin && |
| 314 | (size_t)ptr < (size_t)(stdin+_IOB_ENTRIES)) |
| 315 | BIO_clear_flags(b,BIO_FLAGS_UPLINK); |
| 316 | #endif |
| 317 | #endif |
| 318 | #ifdef UP_fsetmod |
| 319 | if (b->flags&BIO_FLAGS_UPLINK) |
| 320 | UP_fsetmod(b->ptr,(char)((num&BIO_FP_TEXT)?'t':'b')); |
| 321 | else |
| 322 | #endif |
| 323 | { |
| 324 | #if defined(OPENSSL_SYS_WINDOWS) |
| 325 | int fd = _fileno((FILE*)ptr); |
| 326 | if (num & BIO_FP_TEXT) |
| 327 | _setmode(fd,_O_TEXT); |
| 328 | else |
| 329 | _setmode(fd,_O_BINARY); |
| 330 | #elif defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB) |
| 331 | int fd = fileno((FILE*)ptr); |
| 332 | /* Under CLib there are differences in file modes */ |
| 333 | if (num & BIO_FP_TEXT) |
| 334 | setmode(fd,O_TEXT); |
| 335 | else |
| 336 | setmode(fd,O_BINARY); |
| 337 | #elif defined(OPENSSL_SYS_MSDOS) |
| 338 | int fd = fileno((FILE*)ptr); |
| 339 | /* Set correct text/binary mode */ |
| 340 | if (num & BIO_FP_TEXT) |
| 341 | _setmode(fd,_O_TEXT); |
| 342 | /* Dangerous to set stdin/stdout to raw (unless redirected) */ |
| 343 | else |
| 344 | { |
| 345 | if (fd == STDIN_FILENO || fd == STDOUT_FILENO) |
| 346 | { |
| 347 | if (isatty(fd) <= 0) |
| 348 | _setmode(fd,_O_BINARY); |
| 349 | } |
| 350 | else |
| 351 | _setmode(fd,_O_BINARY); |
| 352 | } |
| 353 | #elif defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN) |
| 354 | int fd = fileno((FILE*)ptr); |
| 355 | if (num & BIO_FP_TEXT) |
| 356 | setmode(fd, O_TEXT); |
| 357 | else |
| 358 | setmode(fd, O_BINARY); |
| 359 | #endif |
| 360 | } |
| 361 | break; |
| 362 | case BIO_C_SET_FILENAME: |
| 363 | file_free(b); |
| 364 | b->shutdown=(int)num&BIO_CLOSE; |
| 365 | if (num & BIO_FP_APPEND) |
| 366 | { |
| 367 | if (num & BIO_FP_READ) |
| 368 | BUF_strlcpy(p,"a+",sizeof p); |
| 369 | else BUF_strlcpy(p,"a",sizeof p); |
| 370 | } |
| 371 | else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE)) |
| 372 | BUF_strlcpy(p,"r+",sizeof p); |
| 373 | else if (num & BIO_FP_WRITE) |
| 374 | BUF_strlcpy(p,"w",sizeof p); |
| 375 | else if (num & BIO_FP_READ) |
| 376 | BUF_strlcpy(p,"r",sizeof p); |
| 377 | else |
| 378 | { |
| 379 | BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE); |
| 380 | ret=0; |
| 381 | break; |
| 382 | } |
| 383 | #if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN) |
| 384 | if (!(num & BIO_FP_TEXT)) |
| 385 | strcat(p,"b"); |
| 386 | else |
| 387 | strcat(p,"t"); |
| 388 | #endif |
| 389 | #if defined(OPENSSL_SYS_NETWARE) |
| 390 | if (!(num & BIO_FP_TEXT)) |
| 391 | strcat(p,"b"); |
| 392 | else |
| 393 | strcat(p,"t"); |
| 394 | #endif |
| 395 | fp=fopen(ptr,p); |
| 396 | if (fp == NULL) |
| 397 | { |
| 398 | SYSerr(SYS_F_FOPEN,get_last_sys_error()); |
| 399 | ERR_add_error_data(5,"fopen('",ptr,"','",p,"')"); |
| 400 | BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB); |
| 401 | ret=0; |
| 402 | break; |
| 403 | } |
| 404 | b->ptr=fp; |
| 405 | b->init=1; |
| 406 | BIO_clear_flags(b,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */ |
| 407 | break; |
| 408 | case BIO_C_GET_FILE_PTR: |
| 409 | /* the ptr parameter is actually a FILE ** in this case. */ |
| 410 | if (ptr != NULL) |
| 411 | { |
| 412 | fpp=(FILE **)ptr; |
| 413 | *fpp=(FILE *)b->ptr; |
| 414 | } |
| 415 | break; |
| 416 | case BIO_CTRL_GET_CLOSE: |
| 417 | ret=(long)b->shutdown; |
| 418 | break; |
| 419 | case BIO_CTRL_SET_CLOSE: |
| 420 | b->shutdown=(int)num; |
| 421 | break; |
| 422 | case BIO_CTRL_FLUSH: |
| 423 | if (b->flags&BIO_FLAGS_UPLINK) |
| 424 | UP_fflush(b->ptr); |
| 425 | else |
| 426 | fflush((FILE *)b->ptr); |
| 427 | break; |
| 428 | case BIO_CTRL_DUP: |
| 429 | ret=1; |
| 430 | break; |
| 431 | |
| 432 | case BIO_CTRL_WPENDING: |
| 433 | case BIO_CTRL_PENDING: |
| 434 | case BIO_CTRL_PUSH: |
| 435 | case BIO_CTRL_POP: |
| 436 | default: |
| 437 | ret=0; |
| 438 | break; |
| 439 | } |
| 440 | return(ret); |
| 441 | } |
| 442 | |
| 443 | static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size) |
| 444 | { |
| 445 | int ret=0; |
| 446 | |
| 447 | buf[0]='\0'; |
| 448 | if (bp->flags&BIO_FLAGS_UPLINK) |
| 449 | { |
| 450 | if (!UP_fgets(buf,size,bp->ptr)) |
| 451 | goto err; |
| 452 | } |
| 453 | else |
| 454 | { |
| 455 | if (!fgets(buf,size,(FILE *)bp->ptr)) |
| 456 | goto err; |
| 457 | } |
| 458 | if (buf[0] != '\0') |
| 459 | ret=strlen(buf); |
| 460 | err: |
| 461 | return(ret); |
| 462 | } |
| 463 | |
| 464 | static int MS_CALLBACK file_puts(BIO *bp, const char *str) |
| 465 | { |
| 466 | int n,ret; |
| 467 | |
| 468 | n=strlen(str); |
| 469 | ret=file_write(bp,str,n); |
| 470 | return(ret); |
| 471 | } |
| 472 | |
| 473 | #endif /* OPENSSL_NO_STDIO */ |
| 474 | |
| 475 | #endif /* HEADER_BSS_FILE_C */ |
| 476 | |
| 477 | |