| /* 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.] */ |
| |
| #if !defined(_POSIX_C_SOURCE) |
| #define _POSIX_C_SOURCE 201410L // for snprintf, vprintf etc |
| #endif |
| |
| #include <openssl/bio.h> |
| |
| #include <assert.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| |
| #include <openssl/err.h> |
| #include <openssl/mem.h> |
| |
| int BIO_printf(BIO *bio, const char *format, ...) { |
| va_list args; |
| char buf[256], *out, out_malloced = 0; |
| int out_len, ret; |
| |
| va_start(args, format); |
| out_len = vsnprintf(buf, sizeof(buf), format, args); |
| va_end(args); |
| |
| #if defined(OPENSSL_WINDOWS) |
| // On Windows, vsnprintf returns -1 rather than the requested length on |
| // truncation |
| if (out_len < 0) { |
| va_start(args, format); |
| out_len = _vscprintf(format, args); |
| va_end(args); |
| assert(out_len >= (int)sizeof(buf)); |
| } |
| #endif |
| |
| if (out_len < 0) { |
| return -1; |
| } |
| |
| if ((size_t) out_len >= sizeof(buf)) { |
| const int requested_len = out_len; |
| // The output was truncated. Note that vsnprintf's return value |
| // does not include a trailing NUL, but the buffer must be sized |
| // for it. |
| out = OPENSSL_malloc(requested_len + 1); |
| out_malloced = 1; |
| if (out == NULL) { |
| OPENSSL_PUT_ERROR(BIO, ERR_R_MALLOC_FAILURE); |
| return -1; |
| } |
| va_start(args, format); |
| out_len = vsnprintf(out, requested_len + 1, format, args); |
| va_end(args); |
| assert(out_len == requested_len); |
| } else { |
| out = buf; |
| } |
| |
| ret = BIO_write(bio, out, out_len); |
| if (out_malloced) { |
| OPENSSL_free(out); |
| } |
| |
| return ret; |
| } |