/* $OpenBSD: bss_file.c,v 1.34 2022/01/07 09:02:17 tb Exp $ */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ /* * 03-Dec-1997 rdenny@dc3.com Fix bug preventing use of stdin/stdout * with binary data (e.g. asn1parse -inform DER < xxx) under * Windows */ #ifndef HEADER_BSS_FILE_C #define HEADER_BSS_FILE_C #if defined(__linux) || defined(__sun) || defined(__hpux) /* Following definition aliases fopen to fopen64 on above mentioned * platforms. This makes it possible to open and sequentially access * files larger than 2GB from 32-bit application. It does not allow to * traverse them beyond 2GB with fseek/ftell, but on the other hand *no* * 32-bit platform permits that, not with fseek/ftell. Not to mention * that breaking 2GB limit for seeking would require surgery to *our* * API. But sequential access suffices for practical cases when you * can run into large files, such as fingerprinting, so we can let API * alone. For reference, the list of 32-bit platforms which allow for * sequential access of large files without extra "magic" comprise *BSD, * Darwin, IRIX... */ #ifndef _FILE_OFFSET_BITS #define _FILE_OFFSET_BITS 64 #endif #endif #include #include #include #include #include #include "bio_local.h" static int file_write(BIO *h, const char *buf, int num); static int file_read(BIO *h, char *buf, int size); static int file_puts(BIO *h, const char *str); static int file_gets(BIO *h, char *str, int size); static long file_ctrl(BIO *h, int cmd, long arg1, void *arg2); static int file_new(BIO *h); static int file_free(BIO *data); static const BIO_METHOD methods_filep = { .type = BIO_TYPE_FILE, .name = "FILE pointer", .bwrite = file_write, .bread = file_read, .bputs = file_puts, .bgets = file_gets, .ctrl = file_ctrl, .create = file_new, .destroy = file_free }; BIO * BIO_new_file(const char *filename, const char *mode) { BIO *ret; FILE *file = NULL; file = fopen(filename, mode); if (file == NULL) { SYSerror(errno); ERR_asprintf_error_data("fopen('%s', '%s')", filename, mode); if (errno == ENOENT) BIOerror(BIO_R_NO_SUCH_FILE); else BIOerror(ERR_R_SYS_LIB); return (NULL); } if ((ret = BIO_new(BIO_s_file())) == NULL) { fclose(file); return (NULL); } BIO_set_fp(ret, file, BIO_CLOSE); return (ret); } BIO * BIO_new_fp(FILE *stream, int close_flag) { BIO *ret; if ((ret = BIO_new(BIO_s_file())) == NULL) return (NULL); BIO_set_fp(ret, stream, close_flag); return (ret); } const BIO_METHOD * BIO_s_file(void) { return (&methods_filep); } static int file_new(BIO *bi) { bi->init = 0; bi->num = 0; bi->ptr = NULL; bi->flags=0; return (1); } static int file_free(BIO *a) { if (a == NULL) return (0); if (a->shutdown) { if ((a->init) && (a->ptr != NULL)) { fclose (a->ptr); a->ptr = NULL; a->flags = 0; } a->init = 0; } return (1); } static int file_read(BIO *b, char *out, int outl) { int ret = 0; if (b->init && out != NULL) { ret = fread(out, 1, outl, (FILE *)b->ptr); if (ret == 0 && ferror((FILE *)b->ptr)) { SYSerror(errno); BIOerror(ERR_R_SYS_LIB); ret = -1; } } return (ret); } static int file_write(BIO *b, const char *in, int inl) { int ret = 0; if (b->init && in != NULL) ret = fwrite(in, 1, inl, (FILE *)b->ptr); return (ret); } static long file_ctrl(BIO *b, int cmd, long num, void *ptr) { long ret = 1; FILE *fp = (FILE *)b->ptr; FILE **fpp; char p[4]; switch (cmd) { case BIO_C_FILE_SEEK: case BIO_CTRL_RESET: ret = (long)fseek(fp, num, 0); break; case BIO_CTRL_EOF: ret = (long)feof(fp); break; case BIO_C_FILE_TELL: case BIO_CTRL_INFO: ret = ftell(fp); break; case BIO_C_SET_FILE_PTR: file_free(b); b->shutdown = (int)num&BIO_CLOSE; b->ptr = ptr; b->init = 1; break; case BIO_C_SET_FILENAME: file_free(b); b->shutdown = (int)num&BIO_CLOSE; if (num & BIO_FP_APPEND) { if (num & BIO_FP_READ) strlcpy(p, "a+", sizeof p); else strlcpy(p, "a", sizeof p); } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE)) strlcpy(p, "r+", sizeof p); else if (num & BIO_FP_WRITE) strlcpy(p, "w", sizeof p); else if (num & BIO_FP_READ) strlcpy(p, "r", sizeof p); else { BIOerror(BIO_R_BAD_FOPEN_MODE); ret = 0; break; } fp = fopen(ptr, p); if (fp == NULL) { SYSerror(errno); ERR_asprintf_error_data("fopen('%s', '%s')", ptr, p); BIOerror(ERR_R_SYS_LIB); ret = 0; break; } b->ptr = fp; b->init = 1; break; case BIO_C_GET_FILE_PTR: /* the ptr parameter is actually a FILE ** in this case. */ if (ptr != NULL) { fpp = (FILE **)ptr; *fpp = (FILE *)b->ptr; } break; case BIO_CTRL_GET_CLOSE: ret = (long)b->shutdown; break; case BIO_CTRL_SET_CLOSE: b->shutdown = (int)num; break; case BIO_CTRL_FLUSH: fflush((FILE *)b->ptr); break; case BIO_CTRL_DUP: ret = 1; break; case BIO_CTRL_WPENDING: case BIO_CTRL_PENDING: case BIO_CTRL_PUSH: case BIO_CTRL_POP: default: ret = 0; break; } return (ret); } static int file_gets(BIO *bp, char *buf, int size) { int ret = 0; buf[0] = '\0'; if (!fgets(buf, size,(FILE *)bp->ptr)) goto err; if (buf[0] != '\0') ret = strlen(buf); err: return (ret); } static int file_puts(BIO *bp, const char *str) { int n, ret; n = strlen(str); ret = file_write(bp, str, n); return (ret); } #endif /* HEADER_BSS_FILE_C */