155714Skris/* crypto/bio/bf_nbio.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 8296465Sdelphij * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15296465Sdelphij * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 22296465Sdelphij * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 37296465Sdelphij * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40296465Sdelphij * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 52296465Sdelphij * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include <stdio.h> 6055714Skris#include <errno.h> 6155714Skris#include "cryptlib.h" 6255714Skris#include <openssl/rand.h> 6355714Skris#include <openssl/bio.h> 6455714Skris 65296465Sdelphij/* 66296465Sdelphij * BIO_put and BIO_get both add to the digest, BIO_gets returns the digest 67296465Sdelphij */ 6855714Skris 69296465Sdelphijstatic int nbiof_write(BIO *h, const char *buf, int num); 70296465Sdelphijstatic int nbiof_read(BIO *h, char *buf, int size); 71296465Sdelphijstatic int nbiof_puts(BIO *h, const char *str); 72296465Sdelphijstatic int nbiof_gets(BIO *h, char *str, int size); 73296465Sdelphijstatic long nbiof_ctrl(BIO *h, int cmd, long arg1, void *arg2); 7455714Skrisstatic int nbiof_new(BIO *h); 7555714Skrisstatic int nbiof_free(BIO *data); 76296465Sdelphijstatic long nbiof_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp); 77296465Sdelphijtypedef struct nbio_test_st { 78296465Sdelphij /* only set if we sent a 'should retry' error */ 79296465Sdelphij int lrn; 80296465Sdelphij int lwn; 81296465Sdelphij} NBIO_TEST; 8255714Skris 83296465Sdelphijstatic BIO_METHOD methods_nbiof = { 84296465Sdelphij BIO_TYPE_NBIO_TEST, 85296465Sdelphij "non-blocking IO test filter", 86296465Sdelphij nbiof_write, 87296465Sdelphij nbiof_read, 88296465Sdelphij nbiof_puts, 89296465Sdelphij nbiof_gets, 90296465Sdelphij nbiof_ctrl, 91296465Sdelphij nbiof_new, 92296465Sdelphij nbiof_free, 93296465Sdelphij nbiof_callback_ctrl, 94296465Sdelphij}; 9555714Skris 9655714SkrisBIO_METHOD *BIO_f_nbio_test(void) 97296465Sdelphij{ 98296465Sdelphij return (&methods_nbiof); 99296465Sdelphij} 10055714Skris 10155714Skrisstatic int nbiof_new(BIO *bi) 102296465Sdelphij{ 103296465Sdelphij NBIO_TEST *nt; 10455714Skris 105296465Sdelphij if (!(nt = (NBIO_TEST *)OPENSSL_malloc(sizeof(NBIO_TEST)))) 106296465Sdelphij return (0); 107296465Sdelphij nt->lrn = -1; 108296465Sdelphij nt->lwn = -1; 109296465Sdelphij bi->ptr = (char *)nt; 110296465Sdelphij bi->init = 1; 111296465Sdelphij bi->flags = 0; 112296465Sdelphij return (1); 113296465Sdelphij} 11455714Skris 11555714Skrisstatic int nbiof_free(BIO *a) 116296465Sdelphij{ 117296465Sdelphij if (a == NULL) 118296465Sdelphij return (0); 119296465Sdelphij if (a->ptr != NULL) 120296465Sdelphij OPENSSL_free(a->ptr); 121296465Sdelphij a->ptr = NULL; 122296465Sdelphij a->init = 0; 123296465Sdelphij a->flags = 0; 124296465Sdelphij return (1); 125296465Sdelphij} 126296465Sdelphij 12755714Skrisstatic int nbiof_read(BIO *b, char *out, int outl) 128296465Sdelphij{ 129296465Sdelphij int ret = 0; 130160814Ssimon#if 1 131296465Sdelphij int num; 132296465Sdelphij unsigned char n; 13355714Skris#endif 13455714Skris 135296465Sdelphij if (out == NULL) 136296465Sdelphij return (0); 137296465Sdelphij if (b->next_bio == NULL) 138296465Sdelphij return (0); 13955714Skris 140296465Sdelphij BIO_clear_retry_flags(b); 141160814Ssimon#if 1 142296465Sdelphij RAND_pseudo_bytes(&n, 1); 143296465Sdelphij num = (n & 0x07); 14455714Skris 145296465Sdelphij if (outl > num) 146296465Sdelphij outl = num; 14755714Skris 148296465Sdelphij if (num == 0) { 149296465Sdelphij ret = -1; 150296465Sdelphij BIO_set_retry_read(b); 151296465Sdelphij } else 15255714Skris#endif 153296465Sdelphij { 154296465Sdelphij ret = BIO_read(b->next_bio, out, outl); 155296465Sdelphij if (ret < 0) 156296465Sdelphij BIO_copy_next_retry(b); 157296465Sdelphij } 158296465Sdelphij return (ret); 159296465Sdelphij} 16055714Skris 16168651Skrisstatic int nbiof_write(BIO *b, const char *in, int inl) 162296465Sdelphij{ 163296465Sdelphij NBIO_TEST *nt; 164296465Sdelphij int ret = 0; 165296465Sdelphij int num; 166296465Sdelphij unsigned char n; 16755714Skris 168296465Sdelphij if ((in == NULL) || (inl <= 0)) 169296465Sdelphij return (0); 170296465Sdelphij if (b->next_bio == NULL) 171296465Sdelphij return (0); 172296465Sdelphij nt = (NBIO_TEST *)b->ptr; 17355714Skris 174296465Sdelphij BIO_clear_retry_flags(b); 17555714Skris 17655714Skris#if 1 177296465Sdelphij if (nt->lwn > 0) { 178296465Sdelphij num = nt->lwn; 179296465Sdelphij nt->lwn = 0; 180296465Sdelphij } else { 181296465Sdelphij RAND_pseudo_bytes(&n, 1); 182296465Sdelphij num = (n & 7); 183296465Sdelphij } 18455714Skris 185296465Sdelphij if (inl > num) 186296465Sdelphij inl = num; 18755714Skris 188296465Sdelphij if (num == 0) { 189296465Sdelphij ret = -1; 190296465Sdelphij BIO_set_retry_write(b); 191296465Sdelphij } else 19255714Skris#endif 193296465Sdelphij { 194296465Sdelphij ret = BIO_write(b->next_bio, in, inl); 195296465Sdelphij if (ret < 0) { 196296465Sdelphij BIO_copy_next_retry(b); 197296465Sdelphij nt->lwn = inl; 198296465Sdelphij } 199296465Sdelphij } 200296465Sdelphij return (ret); 201296465Sdelphij} 20255714Skris 20368651Skrisstatic long nbiof_ctrl(BIO *b, int cmd, long num, void *ptr) 204296465Sdelphij{ 205296465Sdelphij long ret; 20655714Skris 207296465Sdelphij if (b->next_bio == NULL) 208296465Sdelphij return (0); 209296465Sdelphij switch (cmd) { 210296465Sdelphij case BIO_C_DO_STATE_MACHINE: 211296465Sdelphij BIO_clear_retry_flags(b); 212296465Sdelphij ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 213296465Sdelphij BIO_copy_next_retry(b); 214296465Sdelphij break; 215296465Sdelphij case BIO_CTRL_DUP: 216296465Sdelphij ret = 0L; 217296465Sdelphij break; 218296465Sdelphij default: 219296465Sdelphij ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 220296465Sdelphij break; 221296465Sdelphij } 222296465Sdelphij return (ret); 223296465Sdelphij} 22455714Skris 22568651Skrisstatic long nbiof_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) 226296465Sdelphij{ 227296465Sdelphij long ret = 1; 22859191Skris 229296465Sdelphij if (b->next_bio == NULL) 230296465Sdelphij return (0); 231296465Sdelphij switch (cmd) { 232296465Sdelphij default: 233296465Sdelphij ret = BIO_callback_ctrl(b->next_bio, cmd, fp); 234296465Sdelphij break; 235296465Sdelphij } 236296465Sdelphij return (ret); 237296465Sdelphij} 23859191Skris 23955714Skrisstatic int nbiof_gets(BIO *bp, char *buf, int size) 240296465Sdelphij{ 241296465Sdelphij if (bp->next_bio == NULL) 242296465Sdelphij return (0); 243296465Sdelphij return (BIO_gets(bp->next_bio, buf, size)); 244296465Sdelphij} 24555714Skris 24668651Skrisstatic int nbiof_puts(BIO *bp, const char *str) 247296465Sdelphij{ 248296465Sdelphij if (bp->next_bio == NULL) 249296465Sdelphij return (0); 250296465Sdelphij return (BIO_puts(bp->next_bio, str)); 251296465Sdelphij} 252