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; 126 127 /* 128 * Basically there are three cases to cover: a) filename is 129 * pure ASCII string; b) actual UTF-8 encoded string and 130 * c) locale-ized string, i.e. one containing 8-bit 131 * characters that are meaningful in current system locale. 132 * If filename is pure ASCII or real UTF-8 encoded string, 133 * MultiByteToWideChar succeeds and _wfopen works. If 134 * filename is locale-ized string, chances are that 135 * MultiByteToWideChar fails reporting 136 * ERROR_NO_UNICODE_TRANSLATION, in which case we fall 137 * back to fopen... 138 */ 139 if ((sz=MultiByteToWideChar(CP_UTF8,MB_ERR_INVALID_CHARS, 140 filename,len_0,NULL,0))>0) 141 { 142 WCHAR wmode[8]; 143 WCHAR *wfilename = _alloca(sz*sizeof(WCHAR)); 144 145 if (MultiByteToWideChar(CP_UTF8,MB_ERR_INVALID_CHARS, 146 filename,len_0,wfilename,sz) && 147 MultiByteToWideChar(CP_UTF8,0,mode,strlen(mode)+1, 148 wmode,sizeof(wmode)/sizeof(wmode[0])) && 149 (file=_wfopen(wfilename,wmode))==NULL && errno==ENOENT 150 ) /* UTF-8 decode succeeded, but no file, filename 151 * could still have been locale-ized... */ 152 file = fopen(filename,mode); 153 } 154 else if (GetLastError()==ERROR_NO_UNICODE_TRANSLATION) 155 { 156 file = fopen(filename,mode); 157 } 158 #else 159 file=fopen(filename,mode); 160 #endif 161 if (file == NULL) 162 { 163 SYSerr(SYS_F_FOPEN,get_last_sys_error()); 164 ERR_add_error_data(5,"fopen('",filename,"','",mode,"')"); 165 if (errno == ENOENT) 166 BIOerr(BIO_F_BIO_NEW_FILE,BIO_R_NO_SUCH_FILE); 167 else 168 BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB); 169 return(NULL); 170 } 171 if ((ret=BIO_new(BIO_s_file())) == NULL) 172 { 173 fclose(file); 174 return(NULL); 175 } 176 177 BIO_clear_flags(ret,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */ 178 BIO_set_fp(ret,file,BIO_CLOSE); 179 return(ret); 180 } 181 182 BIO *BIO_new_fp(FILE *stream, int close_flag) 183 { 184 BIO *ret; 185 186 if ((ret=BIO_new(BIO_s_file())) == NULL) 187 return(NULL); 188 189 BIO_set_flags(ret,BIO_FLAGS_UPLINK); /* redundant, left for documentation puposes */ 190 BIO_set_fp(ret,stream,close_flag); 191 return(ret); 192 } 193 194 BIO_METHOD *BIO_s_file(void) 195 { 196 return(&methods_filep); 197 } 198 199 static int MS_CALLBACK file_new(BIO *bi) 200 { 201 bi->init=0; 202 bi->num=0; 203 bi->ptr=NULL; 204 bi->flags=BIO_FLAGS_UPLINK; /* default to UPLINK */ 205 return(1); 206 } 207 208 static int MS_CALLBACK file_free(BIO *a) 209 { 210 if (a == NULL) return(0); 211 if (a->shutdown) 212 { 213 if ((a->init) && (a->ptr != NULL)) 214 { 215 if (a->flags&BIO_FLAGS_UPLINK) 216 UP_fclose (a->ptr); 217 else 218 fclose (a->ptr); 219 a->ptr=NULL; 220 a->flags=BIO_FLAGS_UPLINK; 221 } 222 a->init=0; 223 } 224 return(1); 225 } 226 227 static int MS_CALLBACK file_read(BIO *b, char *out, int outl) 228 { 229 int ret=0; 230 231 if (b->init && (out != NULL)) 232 { 233 if (b->flags&BIO_FLAGS_UPLINK) 234 ret=UP_fread(out,1,(int)outl,b->ptr); 235 else 236 ret=fread(out,1,(int)outl,(FILE *)b->ptr); 237 if(ret == 0 && (b->flags&BIO_FLAGS_UPLINK)?UP_ferror((FILE *)b->ptr):ferror((FILE *)b->ptr)) 238 { 239 SYSerr(SYS_F_FREAD,get_last_sys_error()); 240 BIOerr(BIO_F_FILE_READ,ERR_R_SYS_LIB); 241 ret=-1; 242 } 243 } 244 return(ret); 245 } 246 247 static int MS_CALLBACK file_write(BIO *b, const char *in, int inl) 248 { 249 int ret=0; 250 251 if (b->init && (in != NULL)) 252 { 253 if (b->flags&BIO_FLAGS_UPLINK) 254 ret=UP_fwrite(in,(int)inl,1,b->ptr); 255 else 256 ret=fwrite(in,(int)inl,1,(FILE *)b->ptr); 257 if (ret) 258 ret=inl; 259 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */ 260 /* according to Tim Hudson <tjh@cryptsoft.com>, the commented 261 * out version above can cause 'inl' write calls under 262 * some stupid stdio implementations (VMS) */ 263 } 264 return(ret); 265 } 266 267 static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, void *ptr) 268 { 269 long ret=1; 270 FILE *fp=(FILE *)b->ptr; 271 FILE **fpp; 272 char p[4]; 273 274 switch (cmd) 275 { 276 case BIO_C_FILE_SEEK: 277 case BIO_CTRL_RESET: 278 if (b->flags&BIO_FLAGS_UPLINK) 279 ret=(long)UP_fseek(b->ptr,num,0); 280 else 281 ret=(long)fseek(fp,num,0); 282 break; 283 case BIO_CTRL_EOF: 284 if (b->flags&BIO_FLAGS_UPLINK) 285 ret=(long)UP_feof(fp); 286 else 287 ret=(long)feof(fp); 288 break; 289 case BIO_C_FILE_TELL: 290 case BIO_CTRL_INFO: 291 if (b->flags&BIO_FLAGS_UPLINK) 292 ret=UP_ftell(b->ptr); 293 else 294 ret=ftell(fp); 295 break; 296 case BIO_C_SET_FILE_PTR: 297 file_free(b); 298 b->shutdown=(int)num&BIO_CLOSE; 299 b->ptr=ptr; 300 b->init=1; 301 #if BIO_FLAGS_UPLINK!=0 302 #if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES) 303 #define _IOB_ENTRIES 20 304 #endif 305 #if defined(_IOB_ENTRIES) 306 /* Safety net to catch purely internal BIO_set_fp calls */ 307 if ((size_t)ptr >= (size_t)stdin && 308 (size_t)ptr < (size_t)(stdin+_IOB_ENTRIES)) 309 BIO_clear_flags(b,BIO_FLAGS_UPLINK); 310 #endif 311 #endif 312 #ifdef UP_fsetmod 313 if (b->flags&BIO_FLAGS_UPLINK) 314 UP_fsetmod(b->ptr,(char)((num&BIO_FP_TEXT)?'t':'b')); 315 else 316 #endif 317 { 318 #if defined(OPENSSL_SYS_WINDOWS) 319 int fd = _fileno((FILE*)ptr); 320 if (num & BIO_FP_TEXT) 321 _setmode(fd,_O_TEXT); 322 else 323 _setmode(fd,_O_BINARY); 324 #elif defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB) 325 int fd = fileno((FILE*)ptr); 326 /* Under CLib there are differences in file modes */ 327 if (num & BIO_FP_TEXT) 328 setmode(fd,O_TEXT); 329 else 330 setmode(fd,O_BINARY); 331 #elif defined(OPENSSL_SYS_MSDOS) 332 int fd = fileno((FILE*)ptr); 333 /* Set correct text/binary mode */ 334 if (num & BIO_FP_TEXT) 335 _setmode(fd,_O_TEXT); 336 /* Dangerous to set stdin/stdout to raw (unless redirected) */ 337 else 338 { 339 if (fd == STDIN_FILENO || fd == STDOUT_FILENO) 340 { 341 if (isatty(fd) <= 0) 342 _setmode(fd,_O_BINARY); 343 } 344 else 345 _setmode(fd,_O_BINARY); 346 } 347 #elif defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN) 348 int fd = fileno((FILE*)ptr); 349 if (num & BIO_FP_TEXT) 350 setmode(fd, O_TEXT); 351 else 352 setmode(fd, O_BINARY); 353 #endif 354 } 355 break; 356 case BIO_C_SET_FILENAME: 357 file_free(b); 358 b->shutdown=(int)num&BIO_CLOSE; 359 if (num & BIO_FP_APPEND) 360 { 361 if (num & BIO_FP_READ) 362 BUF_strlcpy(p,"a+",sizeof p); 363 else BUF_strlcpy(p,"a",sizeof p); 364 } 365 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE)) 366 BUF_strlcpy(p,"r+",sizeof p); 367 else if (num & BIO_FP_WRITE) 368 BUF_strlcpy(p,"w",sizeof p); 369 else if (num & BIO_FP_READ) 370 BUF_strlcpy(p,"r",sizeof p); 371 else 372 { 373 BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE); 374 ret=0; 375 break; 376 } 377 #if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN) 378 if (!(num & BIO_FP_TEXT)) 379 strcat(p,"b"); 380 else 381 strcat(p,"t"); 382 #endif 383 #if defined(OPENSSL_SYS_NETWARE) 384 if (!(num & BIO_FP_TEXT)) 385 strcat(p,"b"); 386 else 387 strcat(p,"t"); 388 #endif 389 fp=fopen(ptr,p); 390 if (fp == NULL) 391 { 392 SYSerr(SYS_F_FOPEN,get_last_sys_error()); 393 ERR_add_error_data(5,"fopen('",ptr,"','",p,"')"); 394 BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB); 395 ret=0; 396 break; 397 } 398 b->ptr=fp; 399 b->init=1; 400 BIO_clear_flags(b,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */ 401 break; 402 case BIO_C_GET_FILE_PTR: 403 /* the ptr parameter is actually a FILE ** in this case. */ 404 if (ptr != NULL) 405 { 406 fpp=(FILE **)ptr; 407 *fpp=(FILE *)b->ptr; 408 } 409 break; 410 case BIO_CTRL_GET_CLOSE: 411 ret=(long)b->shutdown; 412 break; 413 case BIO_CTRL_SET_CLOSE: 414 b->shutdown=(int)num; 415 break; 416 case BIO_CTRL_FLUSH: 417 if (b->flags&BIO_FLAGS_UPLINK) 418 UP_fflush(b->ptr); 419 else 420 fflush((FILE *)b->ptr); 421 break; 422 case BIO_CTRL_DUP: 423 ret=1; 424 break; 425 426 case BIO_CTRL_WPENDING: 427 case BIO_CTRL_PENDING: 428 case BIO_CTRL_PUSH: 429 case BIO_CTRL_POP: 430 default: 431 ret=0; 432 break; 433 } 434 return(ret); 435 } 436 437 static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size) 438 { 439 int ret=0; 440 441 buf[0]='\0'; 442 if (bp->flags&BIO_FLAGS_UPLINK) 443 { 444 if (!UP_fgets(buf,size,bp->ptr)) 445 goto err; 446 } 447 else 448 { 449 if (!fgets(buf,size,(FILE *)bp->ptr)) 450 goto err; 451 } 452 if (buf[0] != '\0') 453 ret=strlen(buf); 454 err: 455 return(ret); 456 } 457 458 static int MS_CALLBACK file_puts(BIO *bp, const char *str) 459 { 460 int n,ret; 461 462 n=strlen(str); 463 ret=file_write(bp,str,n); 464 return(ret); 465 } 466 467 #endif /* OPENSSL_NO_STDIO */ 468 469 #endif /* HEADER_BSS_FILE_C */ 470 471 472