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 #include <stdio.h> 69 #include <errno.h> 70 #include "cryptlib.h" 71 #include <openssl/bio.h> 72 #include <openssl/err.h> 73 74 #if !defined(OPENSSL_NO_STDIO) 75 76 static int MS_CALLBACK file_write(BIO *h, const char *buf, int num); 77 static int MS_CALLBACK file_read(BIO *h, char *buf, int size); 78 static int MS_CALLBACK file_puts(BIO *h, const char *str); 79 static int MS_CALLBACK file_gets(BIO *h, char *str, int size); 80 static long MS_CALLBACK file_ctrl(BIO *h, int cmd, long arg1, void *arg2); 81 static int MS_CALLBACK file_new(BIO *h); 82 static int MS_CALLBACK file_free(BIO *data); 83 static BIO_METHOD methods_filep= 84 { 85 BIO_TYPE_FILE, 86 "FILE pointer", 87 file_write, 88 file_read, 89 file_puts, 90 file_gets, 91 file_ctrl, 92 file_new, 93 file_free, 94 NULL, 95 }; 96 97 BIO *BIO_new_file(const char *filename, const char *mode) 98 { 99 BIO *ret; 100 FILE *file; 101 102 if ((file=fopen(filename,mode)) == NULL) 103 { 104 SYSerr(SYS_F_FOPEN,get_last_sys_error()); 105 ERR_add_error_data(5,"fopen('",filename,"','",mode,"')"); 106 if (errno == ENOENT) 107 BIOerr(BIO_F_BIO_NEW_FILE,BIO_R_NO_SUCH_FILE); 108 else 109 BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB); 110 return(NULL); 111 } 112 if ((ret=BIO_new(BIO_s_file_internal())) == NULL) 113 return(NULL); 114 115 BIO_set_fp(ret,file,BIO_CLOSE); 116 return(ret); 117 } 118 119 BIO *BIO_new_fp(FILE *stream, int close_flag) 120 { 121 BIO *ret; 122 123 if ((ret=BIO_new(BIO_s_file())) == NULL) 124 return(NULL); 125 126 BIO_set_fp(ret,stream,close_flag); 127 return(ret); 128 } 129 130 BIO_METHOD *BIO_s_file(void) 131 { 132 return(&methods_filep); 133 } 134 135 static int MS_CALLBACK file_new(BIO *bi) 136 { 137 bi->init=0; 138 bi->num=0; 139 bi->ptr=NULL; 140 return(1); 141 } 142 143 static int MS_CALLBACK file_free(BIO *a) 144 { 145 if (a == NULL) return(0); 146 if (a->shutdown) 147 { 148 if ((a->init) && (a->ptr != NULL)) 149 { 150 fclose((FILE *)a->ptr); 151 a->ptr=NULL; 152 } 153 a->init=0; 154 } 155 return(1); 156 } 157 158 static int MS_CALLBACK file_read(BIO *b, char *out, int outl) 159 { 160 int ret=0; 161 162 if (b->init && (out != NULL)) 163 { 164 ret=fread(out,1,(int)outl,(FILE *)b->ptr); 165 if(ret == 0 && ferror((FILE *)b->ptr)) 166 { 167 SYSerr(SYS_F_FREAD,get_last_sys_error()); 168 BIOerr(BIO_F_FILE_READ,ERR_R_SYS_LIB); 169 ret=-1; 170 } 171 } 172 return(ret); 173 } 174 175 static int MS_CALLBACK file_write(BIO *b, const char *in, int inl) 176 { 177 int ret=0; 178 179 if (b->init && (in != NULL)) 180 { 181 if (fwrite(in,(int)inl,1,(FILE *)b->ptr)) 182 ret=inl; 183 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */ 184 /* according to Tim Hudson <tjh@cryptsoft.com>, the commented 185 * out version above can cause 'inl' write calls under 186 * some stupid stdio implementations (VMS) */ 187 } 188 return(ret); 189 } 190 191 static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, void *ptr) 192 { 193 long ret=1; 194 FILE *fp=(FILE *)b->ptr; 195 FILE **fpp; 196 char p[4]; 197 198 switch (cmd) 199 { 200 case BIO_C_FILE_SEEK: 201 case BIO_CTRL_RESET: 202 ret=(long)fseek(fp,num,0); 203 break; 204 case BIO_CTRL_EOF: 205 ret=(long)feof(fp); 206 break; 207 case BIO_C_FILE_TELL: 208 case BIO_CTRL_INFO: 209 ret=ftell(fp); 210 break; 211 case BIO_C_SET_FILE_PTR: 212 file_free(b); 213 b->shutdown=(int)num&BIO_CLOSE; 214 b->ptr=(char *)ptr; 215 b->init=1; 216 #if defined(OPENSSL_SYS_WINDOWS) 217 if (num & BIO_FP_TEXT) 218 _setmode(fileno((FILE *)ptr),_O_TEXT); 219 else 220 _setmode(fileno((FILE *)ptr),_O_BINARY); 221 #elif defined(OPENSSL_SYS_MSDOS) 222 { 223 int fd = fileno((FILE*)ptr); 224 /* Set correct text/binary mode */ 225 if (num & BIO_FP_TEXT) 226 _setmode(fd,_O_TEXT); 227 /* Dangerous to set stdin/stdout to raw (unless redirected) */ 228 else 229 { 230 if (fd == STDIN_FILENO || fd == STDOUT_FILENO) 231 { 232 if (isatty(fd) <= 0) 233 _setmode(fd,_O_BINARY); 234 } 235 else 236 _setmode(fd,_O_BINARY); 237 } 238 } 239 #elif defined(OPENSSL_SYS_OS2) 240 if (num & BIO_FP_TEXT) 241 setmode(fileno((FILE *)ptr), O_TEXT); 242 else 243 setmode(fileno((FILE *)ptr), O_BINARY); 244 #endif 245 break; 246 case BIO_C_SET_FILENAME: 247 file_free(b); 248 b->shutdown=(int)num&BIO_CLOSE; 249 if (num & BIO_FP_APPEND) 250 { 251 if (num & BIO_FP_READ) 252 strlcpy(p,"a+",sizeof p); 253 else strlcpy(p,"a",sizeof p); 254 } 255 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE)) 256 strlcpy(p,"r+",sizeof p); 257 else if (num & BIO_FP_WRITE) 258 strlcpy(p,"w",sizeof p); 259 else if (num & BIO_FP_READ) 260 strlcpy(p,"r",sizeof p); 261 else 262 { 263 BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE); 264 ret=0; 265 break; 266 } 267 #if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_OS2) 268 if (!(num & BIO_FP_TEXT)) 269 strcat(p,"b"); 270 else 271 strcat(p,"t"); 272 #endif 273 fp=fopen(ptr,p); 274 if (fp == NULL) 275 { 276 SYSerr(SYS_F_FOPEN,get_last_sys_error()); 277 ERR_add_error_data(5,"fopen('",ptr,"','",p,"')"); 278 BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB); 279 ret=0; 280 break; 281 } 282 b->ptr=(char *)fp; 283 b->init=1; 284 break; 285 case BIO_C_GET_FILE_PTR: 286 /* the ptr parameter is actually a FILE ** in this case. */ 287 if (ptr != NULL) 288 { 289 fpp=(FILE **)ptr; 290 *fpp=(FILE *)b->ptr; 291 } 292 break; 293 case BIO_CTRL_GET_CLOSE: 294 ret=(long)b->shutdown; 295 break; 296 case BIO_CTRL_SET_CLOSE: 297 b->shutdown=(int)num; 298 break; 299 case BIO_CTRL_FLUSH: 300 fflush((FILE *)b->ptr); 301 break; 302 case BIO_CTRL_DUP: 303 ret=1; 304 break; 305 306 case BIO_CTRL_WPENDING: 307 case BIO_CTRL_PENDING: 308 case BIO_CTRL_PUSH: 309 case BIO_CTRL_POP: 310 default: 311 ret=0; 312 break; 313 } 314 return(ret); 315 } 316 317 static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size) 318 { 319 int ret=0; 320 321 buf[0]='\0'; 322 fgets(buf,size,(FILE *)bp->ptr); 323 if (buf[0] != '\0') 324 ret=strlen(buf); 325 return(ret); 326 } 327 328 static int MS_CALLBACK file_puts(BIO *bp, const char *str) 329 { 330 int n,ret; 331 332 n=strlen(str); 333 ret=file_write(bp,str,n); 334 return(ret); 335 } 336 337 #endif /* OPENSSL_NO_STDIO */ 338 339 #endif /* HEADER_BSS_FILE_C */ 340 341 342