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Diffstat (limited to 'rcynic-ng/bio_f_linebreak.c')
| -rw-r--r-- | rcynic-ng/bio_f_linebreak.c | 268 |
1 files changed, 0 insertions, 268 deletions
diff --git a/rcynic-ng/bio_f_linebreak.c b/rcynic-ng/bio_f_linebreak.c deleted file mode 100644 index 0376456e..00000000 --- a/rcynic-ng/bio_f_linebreak.c +++ /dev/null @@ -1,268 +0,0 @@ -/* $Id$ */ - -/** @file bio_f_linebreak.c - * - * This implements a trivial filter BIO (see OpenSSL manual) which - * does one rather silly thing: on read, it inserts line break into - * the input stream at regular intervals. - * - * You might reasonaly ask why anyone would want such a thing. The - * answer is that OpenSSL's Base64 filter BIO has two input modes, - * neither of which is really useful for reading generalized Base64 - * input. In one mode, it requires line breaks at most every 79 - * characters; in the other mode, it requires that there to be no - * whitespace of any kind at all. These modes work for the things - * that OpenSSL itself does with Base64 decoding, but fail miserably - * when used to read free-form Base64 text. - * - * The real solution would be to rewrite OpenSSL's Base64 filter to - * support a third mode in which it accepts generalized Base64 text, - * but that's been suggested before and nothing has been done about - * it, probably because OpenSSL's Base64 implementation is completely - * line-oriented and rather nasty. - * - * So this filter is a stop-gap to let us get the job done. Since it - * uses a (relatively) well-defined OpenSSL internal API, it should be - * reasonably stable. - * - * 98% of the code in this module is derived from "null filter" BIO - * that ships with OpenSSL (BIO_TYPE_NULL_FILTER), so I consider this - * to be a derivative work, thus am leaving it under OpenSSL's license. - */ - -/* Original crypto/bio/bf_null.c code was: - * - * 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.] - */ - -#include <stdio.h> -#include <errno.h> -#include <string.h> -#include <openssl/bio.h> - -#include "bio_f_linebreak.h" - -#ifndef BIO_TYPE_LINEBREAK_FILTER -#define BIO_TYPE_LINEBREAK_FILTER (99 | BIO_TYPE_FILTER) -#endif - -#ifndef LINEBREAK_MAX_LINE -#define LINEBREAK_MAX_LINE 72 /* We break anything longer than this */ -#endif - -static int linebreak_new(BIO *b) -{ - b->init = 1; - b->ptr = NULL; - b->flags = 0; - b->num = 0; - return 1; -} - -static int linebreak_free(BIO *b) -{ - return b != NULL; -} - -static int linebreak_read(BIO *b, char *out, int outl) -{ - int ret = 0, want, n, i; - - if (out == NULL || b->next_bio == NULL || outl <= 0) - return 0; - - while (outl > 0) { - - if (b->num >= LINEBREAK_MAX_LINE) { - b->num = 0; - *out++ = '\n'; - outl--; - ret++; - continue; - } - - want = LINEBREAK_MAX_LINE - b->num; - if (want > outl) - want = outl; - - n = BIO_read(b->next_bio, out, want); - - BIO_clear_retry_flags(b); - BIO_copy_next_retry(b); - - if (n > 0) { - for (i = n - 1; i >= 0; i--) - if (out[i] == '\n') - break; - if (i >= 0) - b->num = n - i - 1; - else - b->num += n; - out += n; - outl -= n; - ret += n; - continue; - } - - if (ret == 0) - ret = n; - break; - - } - - return ret; -} - -static int linebreak_write(BIO *b, const char *in, int inl) -{ - int ret = 0; - - if (in == NULL || inl <= 0 || b->next_bio == NULL) - return 0; - - ret = BIO_write(b->next_bio, in, inl); - - BIO_clear_retry_flags(b); - BIO_copy_next_retry(b); - - return ret; -} - -static long linebreak_ctrl(BIO *b, int cmd, long num, void *ptr) -{ - long ret; - - if (b->next_bio == NULL) - return 0; - - switch (cmd) { - - case BIO_C_DO_STATE_MACHINE: - BIO_clear_retry_flags(b); - ret = BIO_ctrl(b->next_bio, cmd, num, ptr); - BIO_copy_next_retry(b); - return ret; - - case BIO_CTRL_DUP: - return 0; - - default: - return BIO_ctrl(b->next_bio, cmd, num, ptr); - - } -} - -static long linebreak_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) -{ - if (b->next_bio == NULL) - return 0; - else - return BIO_callback_ctrl(b->next_bio, cmd, fp); -} - -static int linebreak_puts(BIO *bp, const char *str) -{ - if (bp->next_bio == NULL) - return 0; - else - return BIO_puts(bp->next_bio, str); -} - -static BIO_METHOD methods_linebreak = { - BIO_TYPE_LINEBREAK_FILTER, - "Linebreak filter", - linebreak_write, - linebreak_read, - linebreak_puts, - NULL, /* No linebreak_gets() */ - linebreak_ctrl, - linebreak_new, - linebreak_free, - linebreak_callback_ctrl, -}; - -BIO_METHOD *BIO_f_linebreak(void) -{ - return &methods_linebreak; -} - - -#ifdef __BIO_F_LINEBREAK_UNIT_TEST__ - -int main (int argc, char *argv[]) -{ - BIO *ich = BIO_new_fd(0, 1); - BIO *och = BIO_new_fd(1, 1); - BIO *fch = BIO_new(BIO_f_linebreak()); - char buffer[4098]; - int n; - - if (ich == NULL || och == NULL || fch == NULL) - return 1; - - BIO_push(fch, ich); - ich = fch; - - while ((n = BIO_read(ich, buffer, sizeof(buffer))) > 0) - BIO_write(och, buffer, n); - - BIO_free_all(ich); - BIO_free_all(och); - return 0; -} - -#endif |