/* $OpenBSD: bf_null.c,v 1.10 2014/06/12 15:49:28 deraadt 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.] */ #include #include #include /* BIO_put and BIO_get both add to the digest, * BIO_gets returns the digest */ static int nullf_write(BIO *h, const char *buf, int num); static int nullf_read(BIO *h, char *buf, int size); static int nullf_puts(BIO *h, const char *str); static int nullf_gets(BIO *h, char *str, int size); static long nullf_ctrl(BIO *h, int cmd, long arg1, void *arg2); static int nullf_new(BIO *h); static int nullf_free(BIO *data); static long nullf_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp); static BIO_METHOD methods_nullf = { .type = BIO_TYPE_NULL_FILTER, .name = "NULL filter", .bwrite = nullf_write, .bread = nullf_read, .bputs = nullf_puts, .bgets = nullf_gets, .ctrl = nullf_ctrl, .create = nullf_new, .destroy = nullf_free, .callback_ctrl = nullf_callback_ctrl }; BIO_METHOD * BIO_f_null(void) { return (&methods_nullf); } static int nullf_new(BIO *bi) { bi->init = 1; bi->ptr = NULL; bi->flags = 0; return (1); } static int nullf_free(BIO *a) { if (a == NULL) return (0); /* a->ptr=NULL; a->init=0; a->flags=0;*/ return (1); } static int nullf_read(BIO *b, char *out, int outl) { int ret = 0; if (out == NULL) return (0); if (b->next_bio == NULL) return (0); ret = BIO_read(b->next_bio, out, outl); BIO_clear_retry_flags(b); BIO_copy_next_retry(b); return (ret); } static int nullf_write(BIO *b, const char *in, int inl) { int ret = 0; if ((in == NULL) || (inl <= 0)) return (0); if (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 nullf_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); break; case BIO_CTRL_DUP: ret = 0L; break; default: ret = BIO_ctrl(b->next_bio, cmd, num, ptr); } return (ret); } static long nullf_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) { long ret = 1; if (b->next_bio == NULL) return (0); switch (cmd) { default: ret = BIO_callback_ctrl(b->next_bio, cmd, fp); break; } return (ret); } static int nullf_gets(BIO *bp, char *buf, int size) { if (bp->next_bio == NULL) return (0); return (BIO_gets(bp->next_bio, buf, size)); } static int nullf_puts(BIO *bp, const char *str) { if (bp->next_bio == NULL) return (0); return (BIO_puts(bp->next_bio, str)); }