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(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 BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB); 107 return(NULL); 108 } 109 if ((ret=BIO_new(BIO_s_file_internal())) == NULL) 110 return(NULL); 111 112 BIO_set_fp(ret,file,BIO_CLOSE); 113 return(ret); 114 } 115 116 BIO *BIO_new_fp(FILE *stream, int close_flag) 117 { 118 BIO *ret; 119 120 if ((ret=BIO_new(BIO_s_file())) == NULL) 121 return(NULL); 122 123 BIO_set_fp(ret,stream,close_flag); 124 return(ret); 125 } 126 127 BIO_METHOD *BIO_s_file(void) 128 { 129 return(&methods_filep); 130 } 131 132 static int MS_CALLBACK file_new(BIO *bi) 133 { 134 bi->init=0; 135 bi->num=0; 136 bi->ptr=NULL; 137 return(1); 138 } 139 140 static int MS_CALLBACK file_free(BIO *a) 141 { 142 if (a == NULL) return(0); 143 if (a->shutdown) 144 { 145 if ((a->init) && (a->ptr != NULL)) 146 { 147 fclose((FILE *)a->ptr); 148 a->ptr=NULL; 149 } 150 a->init=0; 151 } 152 return(1); 153 } 154 155 static int MS_CALLBACK file_read(BIO *b, char *out, int outl) 156 { 157 int ret=0; 158 159 if (b->init && (out != NULL)) 160 { 161 ret=fread(out,1,(int)outl,(FILE *)b->ptr); 162 } 163 return(ret); 164 } 165 166 static int MS_CALLBACK file_write(BIO *b, const char *in, int inl) 167 { 168 int ret=0; 169 170 if (b->init && (in != NULL)) 171 { 172 if (fwrite(in,(int)inl,1,(FILE *)b->ptr)) 173 ret=inl; 174 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */ 175 /* according to Tim Hudson <tjh@cryptsoft.com>, the commented 176 * out version above can cause 'inl' write calls under 177 * some stupid stdio implementations (VMS) */ 178 } 179 return(ret); 180 } 181 182 static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, void *ptr) 183 { 184 long ret=1; 185 FILE *fp=(FILE *)b->ptr; 186 FILE **fpp; 187 char p[4]; 188 189 switch (cmd) 190 { 191 case BIO_C_FILE_SEEK: 192 case BIO_CTRL_RESET: 193 ret=(long)fseek(fp,num,0); 194 break; 195 case BIO_CTRL_EOF: 196 ret=(long)feof(fp); 197 break; 198 case BIO_C_FILE_TELL: 199 case BIO_CTRL_INFO: 200 ret=ftell(fp); 201 break; 202 case BIO_C_SET_FILE_PTR: 203 file_free(b); 204 b->shutdown=(int)num&BIO_CLOSE; 205 b->ptr=(char *)ptr; 206 b->init=1; 207 #if defined(MSDOS) || defined(WINDOWS) 208 /* Set correct text/binary mode */ 209 if (num & BIO_FP_TEXT) 210 _setmode(fileno((FILE *)ptr),_O_TEXT); 211 else 212 _setmode(fileno((FILE *)ptr),_O_BINARY); 213 #endif 214 break; 215 case BIO_C_SET_FILENAME: 216 file_free(b); 217 b->shutdown=(int)num&BIO_CLOSE; 218 if (num & BIO_FP_APPEND) 219 { 220 if (num & BIO_FP_READ) 221 strcpy(p,"a+"); 222 else strcpy(p,"a"); 223 } 224 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE)) 225 strcpy(p,"r+"); 226 else if (num & BIO_FP_WRITE) 227 strcpy(p,"w"); 228 else if (num & BIO_FP_READ) 229 strcpy(p,"r"); 230 else 231 { 232 BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE); 233 ret=0; 234 break; 235 } 236 #if defined(MSDOS) || defined(WINDOWS) 237 if (!(num & BIO_FP_TEXT)) 238 strcat(p,"b"); 239 else 240 strcat(p,"t"); 241 #endif 242 fp=fopen(ptr,p); 243 if (fp == NULL) 244 { 245 SYSerr(SYS_F_FOPEN,get_last_sys_error()); 246 ERR_add_error_data(5,"fopen('",ptr,"','",p,"')"); 247 BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB); 248 ret=0; 249 break; 250 } 251 b->ptr=(char *)fp; 252 b->init=1; 253 break; 254 case BIO_C_GET_FILE_PTR: 255 /* the ptr parameter is actually a FILE ** in this case. */ 256 if (ptr != NULL) 257 { 258 fpp=(FILE **)ptr; 259 *fpp=(FILE *)b->ptr; 260 } 261 break; 262 case BIO_CTRL_GET_CLOSE: 263 ret=(long)b->shutdown; 264 break; 265 case BIO_CTRL_SET_CLOSE: 266 b->shutdown=(int)num; 267 break; 268 case BIO_CTRL_FLUSH: 269 fflush((FILE *)b->ptr); 270 break; 271 case BIO_CTRL_DUP: 272 ret=1; 273 break; 274 275 case BIO_CTRL_WPENDING: 276 case BIO_CTRL_PENDING: 277 case BIO_CTRL_PUSH: 278 case BIO_CTRL_POP: 279 default: 280 ret=0; 281 break; 282 } 283 return(ret); 284 } 285 286 static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size) 287 { 288 int ret=0; 289 290 buf[0]='\0'; 291 fgets(buf,size,(FILE *)bp->ptr); 292 if (buf[0] != '\0') 293 ret=strlen(buf); 294 return(ret); 295 } 296 297 static int MS_CALLBACK file_puts(BIO *bp, const char *str) 298 { 299 int n,ret; 300 301 n=strlen(str); 302 ret=file_write(bp,str,n); 303 return(ret); 304 } 305 306 #endif /* NO_STDIO */ 307 308 #endif /* HEADER_BSS_FILE_C */ 309 310 311