1 /* $OpenBSD: bss_file.c,v 1.34 2022/01/07 09:02:17 tb 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 #include "bio_local.h" 94 95 static int file_write(BIO *h, const char *buf, int num); 96 static int file_read(BIO *h, char *buf, int size); 97 static int file_puts(BIO *h, const char *str); 98 static int file_gets(BIO *h, char *str, int size); 99 static long file_ctrl(BIO *h, int cmd, long arg1, void *arg2); 100 static int file_new(BIO *h); 101 static int file_free(BIO *data); 102 103 static const BIO_METHOD methods_filep = { 104 .type = BIO_TYPE_FILE, 105 .name = "FILE pointer", 106 .bwrite = file_write, 107 .bread = file_read, 108 .bputs = file_puts, 109 .bgets = file_gets, 110 .ctrl = file_ctrl, 111 .create = file_new, 112 .destroy = file_free 113 }; 114 115 BIO * 116 BIO_new_file(const char *filename, const char *mode) 117 { 118 BIO *ret; 119 FILE *file = NULL; 120 121 file = fopen(filename, mode); 122 123 if (file == NULL) { 124 SYSerror(errno); 125 ERR_asprintf_error_data("fopen('%s', '%s')", filename, mode); 126 if (errno == ENOENT) 127 BIOerror(BIO_R_NO_SUCH_FILE); 128 else 129 BIOerror(ERR_R_SYS_LIB); 130 return (NULL); 131 } 132 if ((ret = BIO_new(BIO_s_file())) == NULL) { 133 fclose(file); 134 return (NULL); 135 } 136 137 BIO_set_fp(ret, file, BIO_CLOSE); 138 return (ret); 139 } 140 141 BIO * 142 BIO_new_fp(FILE *stream, int close_flag) 143 { 144 BIO *ret; 145 146 if ((ret = BIO_new(BIO_s_file())) == NULL) 147 return (NULL); 148 149 BIO_set_fp(ret, stream, close_flag); 150 return (ret); 151 } 152 153 const BIO_METHOD * 154 BIO_s_file(void) 155 { 156 return (&methods_filep); 157 } 158 159 static int 160 file_new(BIO *bi) 161 { 162 bi->init = 0; 163 bi->num = 0; 164 bi->ptr = NULL; 165 bi->flags=0; 166 return (1); 167 } 168 169 static int 170 file_free(BIO *a) 171 { 172 if (a == NULL) 173 return (0); 174 if (a->shutdown) { 175 if ((a->init) && (a->ptr != NULL)) { 176 fclose (a->ptr); 177 a->ptr = NULL; 178 a->flags = 0; 179 } 180 a->init = 0; 181 } 182 return (1); 183 } 184 185 static int 186 file_read(BIO *b, char *out, int outl) 187 { 188 int ret = 0; 189 190 if (b->init && out != NULL) { 191 ret = fread(out, 1, outl, (FILE *)b->ptr); 192 if (ret == 0 && ferror((FILE *)b->ptr)) { 193 SYSerror(errno); 194 BIOerror(ERR_R_SYS_LIB); 195 ret = -1; 196 } 197 } 198 return (ret); 199 } 200 201 static int 202 file_write(BIO *b, const char *in, int inl) 203 { 204 int ret = 0; 205 206 if (b->init && in != NULL) 207 ret = fwrite(in, 1, inl, (FILE *)b->ptr); 208 return (ret); 209 } 210 211 static long 212 file_ctrl(BIO *b, int cmd, long num, void *ptr) 213 { 214 long ret = 1; 215 FILE *fp = (FILE *)b->ptr; 216 FILE **fpp; 217 char p[4]; 218 219 switch (cmd) { 220 case BIO_C_FILE_SEEK: 221 case BIO_CTRL_RESET: 222 ret = (long)fseek(fp, num, 0); 223 break; 224 case BIO_CTRL_EOF: 225 ret = (long)feof(fp); 226 break; 227 case BIO_C_FILE_TELL: 228 case BIO_CTRL_INFO: 229 ret = ftell(fp); 230 break; 231 case BIO_C_SET_FILE_PTR: 232 file_free(b); 233 b->shutdown = (int)num&BIO_CLOSE; 234 b->ptr = ptr; 235 b->init = 1; 236 break; 237 case BIO_C_SET_FILENAME: 238 file_free(b); 239 b->shutdown = (int)num&BIO_CLOSE; 240 if (num & BIO_FP_APPEND) { 241 if (num & BIO_FP_READ) 242 strlcpy(p, "a+", sizeof p); 243 else strlcpy(p, "a", sizeof p); 244 } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE)) 245 strlcpy(p, "r+", sizeof p); 246 else if (num & BIO_FP_WRITE) 247 strlcpy(p, "w", sizeof p); 248 else if (num & BIO_FP_READ) 249 strlcpy(p, "r", sizeof p); 250 else { 251 BIOerror(BIO_R_BAD_FOPEN_MODE); 252 ret = 0; 253 break; 254 } 255 fp = fopen(ptr, p); 256 if (fp == NULL) { 257 SYSerror(errno); 258 ERR_asprintf_error_data("fopen('%s', '%s')", ptr, p); 259 BIOerror(ERR_R_SYS_LIB); 260 ret = 0; 261 break; 262 } 263 b->ptr = fp; 264 b->init = 1; 265 break; 266 case BIO_C_GET_FILE_PTR: 267 /* the ptr parameter is actually a FILE ** in this case. */ 268 if (ptr != NULL) { 269 fpp = (FILE **)ptr; 270 *fpp = (FILE *)b->ptr; 271 } 272 break; 273 case BIO_CTRL_GET_CLOSE: 274 ret = (long)b->shutdown; 275 break; 276 case BIO_CTRL_SET_CLOSE: 277 b->shutdown = (int)num; 278 break; 279 case BIO_CTRL_FLUSH: 280 fflush((FILE *)b->ptr); 281 break; 282 case BIO_CTRL_DUP: 283 ret = 1; 284 break; 285 286 case BIO_CTRL_WPENDING: 287 case BIO_CTRL_PENDING: 288 case BIO_CTRL_PUSH: 289 case BIO_CTRL_POP: 290 default: 291 ret = 0; 292 break; 293 } 294 return (ret); 295 } 296 297 static int 298 file_gets(BIO *bp, char *buf, int size) 299 { 300 int ret = 0; 301 302 buf[0] = '\0'; 303 if (!fgets(buf, size,(FILE *)bp->ptr)) 304 goto err; 305 if (buf[0] != '\0') 306 ret = strlen(buf); 307 err: 308 return (ret); 309 } 310 311 static int 312 file_puts(BIO *bp, const char *str) 313 { 314 int n, ret; 315 316 n = strlen(str); 317 ret = file_write(bp, str, n); 318 return (ret); 319 } 320 321 322 #endif /* HEADER_BSS_FILE_C */ 323