1 /* $OpenBSD: bss_file.c,v 1.30 2014/07/11 08:44:47 jsing Exp $ */ 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 <errno.h> 87 #include <stdio.h> 88 #include <string.h> 89 90 #include <openssl/bio.h> 91 #include <openssl/err.h> 92 93 static int file_write(BIO *h, const char *buf, int num); 94 static int file_read(BIO *h, char *buf, int size); 95 static int file_puts(BIO *h, const char *str); 96 static int file_gets(BIO *h, char *str, int size); 97 static long file_ctrl(BIO *h, int cmd, long arg1, void *arg2); 98 static int file_new(BIO *h); 99 static int file_free(BIO *data); 100 101 static BIO_METHOD methods_filep = { 102 .type = BIO_TYPE_FILE, 103 .name = "FILE pointer", 104 .bwrite = file_write, 105 .bread = file_read, 106 .bputs = file_puts, 107 .bgets = file_gets, 108 .ctrl = file_ctrl, 109 .create = file_new, 110 .destroy = file_free 111 }; 112 113 BIO * 114 BIO_new_file(const char *filename, const char *mode) 115 { 116 BIO *ret; 117 FILE *file = NULL; 118 119 file = fopen(filename, mode); 120 121 if (file == NULL) { 122 SYSerr(SYS_F_FOPEN, errno); 123 ERR_asprintf_error_data("fopen('%s', '%s')", filename, mode); 124 if (errno == ENOENT) 125 BIOerr(BIO_F_BIO_NEW_FILE, BIO_R_NO_SUCH_FILE); 126 else 127 BIOerr(BIO_F_BIO_NEW_FILE, ERR_R_SYS_LIB); 128 return (NULL); 129 } 130 if ((ret = BIO_new(BIO_s_file())) == NULL) { 131 fclose(file); 132 return (NULL); 133 } 134 135 BIO_set_fp(ret, file, BIO_CLOSE); 136 return (ret); 137 } 138 139 BIO * 140 BIO_new_fp(FILE *stream, int close_flag) 141 { 142 BIO *ret; 143 144 if ((ret = BIO_new(BIO_s_file())) == NULL) 145 return (NULL); 146 147 BIO_set_fp(ret, stream, close_flag); 148 return (ret); 149 } 150 151 BIO_METHOD * 152 BIO_s_file(void) 153 { 154 return (&methods_filep); 155 } 156 157 static int 158 file_new(BIO *bi) 159 { 160 bi->init = 0; 161 bi->num = 0; 162 bi->ptr = NULL; 163 bi->flags=0; 164 return (1); 165 } 166 167 static int 168 file_free(BIO *a) 169 { 170 if (a == NULL) 171 return (0); 172 if (a->shutdown) { 173 if ((a->init) && (a->ptr != NULL)) { 174 fclose (a->ptr); 175 a->ptr = NULL; 176 a->flags = 0; 177 } 178 a->init = 0; 179 } 180 return (1); 181 } 182 183 static int 184 file_read(BIO *b, char *out, int outl) 185 { 186 int ret = 0; 187 188 if (b->init && out != NULL) { 189 ret = fread(out, 1, outl, (FILE *)b->ptr); 190 if (ret == 0 && ferror((FILE *)b->ptr)) { 191 SYSerr(SYS_F_FREAD, errno); 192 BIOerr(BIO_F_FILE_READ, ERR_R_SYS_LIB); 193 ret = -1; 194 } 195 } 196 return (ret); 197 } 198 199 static int 200 file_write(BIO *b, const char *in, int inl) 201 { 202 int ret = 0; 203 204 if (b->init && in != NULL) 205 ret = fwrite(in, 1, inl, (FILE *)b->ptr); 206 return (ret); 207 } 208 209 static long 210 file_ctrl(BIO *b, int cmd, long num, void *ptr) 211 { 212 long ret = 1; 213 FILE *fp = (FILE *)b->ptr; 214 FILE **fpp; 215 char p[4]; 216 217 switch (cmd) { 218 case BIO_C_FILE_SEEK: 219 case BIO_CTRL_RESET: 220 ret = (long)fseek(fp, num, 0); 221 break; 222 case BIO_CTRL_EOF: 223 ret = (long)feof(fp); 224 break; 225 case BIO_C_FILE_TELL: 226 case BIO_CTRL_INFO: 227 ret = ftell(fp); 228 break; 229 case BIO_C_SET_FILE_PTR: 230 file_free(b); 231 b->shutdown = (int)num&BIO_CLOSE; 232 b->ptr = ptr; 233 b->init = 1; 234 break; 235 case BIO_C_SET_FILENAME: 236 file_free(b); 237 b->shutdown = (int)num&BIO_CLOSE; 238 if (num & BIO_FP_APPEND) { 239 if (num & BIO_FP_READ) 240 strlcpy(p, "a+", sizeof p); 241 else strlcpy(p, "a", sizeof p); 242 } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE)) 243 strlcpy(p, "r+", sizeof p); 244 else if (num & BIO_FP_WRITE) 245 strlcpy(p, "w", sizeof p); 246 else if (num & BIO_FP_READ) 247 strlcpy(p, "r", sizeof p); 248 else { 249 BIOerr(BIO_F_FILE_CTRL, BIO_R_BAD_FOPEN_MODE); 250 ret = 0; 251 break; 252 } 253 fp = fopen(ptr, p); 254 if (fp == NULL) { 255 SYSerr(SYS_F_FOPEN, errno); 256 ERR_asprintf_error_data("fopen('%s', '%s')", ptr, p); 257 BIOerr(BIO_F_FILE_CTRL, ERR_R_SYS_LIB); 258 ret = 0; 259 break; 260 } 261 b->ptr = fp; 262 b->init = 1; 263 break; 264 case BIO_C_GET_FILE_PTR: 265 /* the ptr parameter is actually a FILE ** in this case. */ 266 if (ptr != NULL) { 267 fpp = (FILE **)ptr; 268 *fpp = (FILE *)b->ptr; 269 } 270 break; 271 case BIO_CTRL_GET_CLOSE: 272 ret = (long)b->shutdown; 273 break; 274 case BIO_CTRL_SET_CLOSE: 275 b->shutdown = (int)num; 276 break; 277 case BIO_CTRL_FLUSH: 278 fflush((FILE *)b->ptr); 279 break; 280 case BIO_CTRL_DUP: 281 ret = 1; 282 break; 283 284 case BIO_CTRL_WPENDING: 285 case BIO_CTRL_PENDING: 286 case BIO_CTRL_PUSH: 287 case BIO_CTRL_POP: 288 default: 289 ret = 0; 290 break; 291 } 292 return (ret); 293 } 294 295 static int 296 file_gets(BIO *bp, char *buf, int size) 297 { 298 int ret = 0; 299 300 buf[0] = '\0'; 301 if (!fgets(buf, size,(FILE *)bp->ptr)) 302 goto err; 303 if (buf[0] != '\0') 304 ret = strlen(buf); 305 err: 306 return (ret); 307 } 308 309 static int 310 file_puts(BIO *bp, const char *str) 311 { 312 int n, ret; 313 314 n = strlen(str); 315 ret = file_write(bp, str, n); 316 return (ret); 317 } 318 319 320 #endif /* HEADER_BSS_FILE_C */ 321