2016-05-17 18:52:22 +00:00
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/*
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* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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2015-01-22 03:40:55 +00:00
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*
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2016-05-17 18:52:22 +00:00
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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1998-12-21 10:52:47 +00:00
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*/
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#include <stdio.h>
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#include <errno.h>
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2016-03-22 09:21:29 +00:00
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#include "bio_lcl.h"
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2015-05-14 14:56:48 +00:00
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#include "internal/cryptlib.h"
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1999-04-23 22:13:45 +00:00
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#include <openssl/rand.h>
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1998-12-21 10:52:47 +00:00
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2015-01-22 03:40:55 +00:00
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/*
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* BIO_put and BIO_get both add to the digest, BIO_gets returns the digest
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*/
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1998-12-21 10:52:47 +00:00
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2015-01-22 03:40:55 +00:00
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static int nbiof_write(BIO *h, const char *buf, int num);
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static int nbiof_read(BIO *h, char *buf, int size);
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static int nbiof_puts(BIO *h, const char *str);
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static int nbiof_gets(BIO *h, char *str, int size);
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static long nbiof_ctrl(BIO *h, int cmd, long arg1, void *arg2);
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1998-12-21 10:52:47 +00:00
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static int nbiof_new(BIO *h);
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static int nbiof_free(BIO *data);
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2015-01-22 03:40:55 +00:00
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static long nbiof_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
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typedef struct nbio_test_st {
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/* only set if we sent a 'should retry' error */
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int lrn;
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int lwn;
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} NBIO_TEST;
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2016-03-19 16:32:14 +00:00
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static const BIO_METHOD methods_nbiof = {
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2015-01-22 03:40:55 +00:00
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BIO_TYPE_NBIO_TEST,
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"non-blocking IO test filter",
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nbiof_write,
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nbiof_read,
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nbiof_puts,
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nbiof_gets,
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nbiof_ctrl,
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nbiof_new,
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nbiof_free,
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nbiof_callback_ctrl,
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};
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1998-12-21 10:52:47 +00:00
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2016-03-19 16:32:14 +00:00
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const BIO_METHOD *BIO_f_nbio_test(void)
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2015-01-22 03:40:55 +00:00
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{
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return (&methods_nbiof);
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}
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1998-12-21 10:52:47 +00:00
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1999-04-19 21:31:43 +00:00
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static int nbiof_new(BIO *bi)
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2015-01-22 03:40:55 +00:00
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{
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NBIO_TEST *nt;
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2015-09-03 13:15:26 +00:00
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if ((nt = OPENSSL_zalloc(sizeof(*nt))) == NULL)
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2015-01-22 03:40:55 +00:00
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return (0);
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nt->lrn = -1;
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nt->lwn = -1;
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bi->ptr = (char *)nt;
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bi->init = 1;
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return (1);
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}
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1998-12-21 10:52:47 +00:00
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1999-04-19 21:31:43 +00:00
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static int nbiof_free(BIO *a)
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2015-01-22 03:40:55 +00:00
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{
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if (a == NULL)
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return (0);
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2015-05-01 14:02:07 +00:00
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OPENSSL_free(a->ptr);
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2015-01-22 03:40:55 +00:00
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a->ptr = NULL;
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a->init = 0;
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a->flags = 0;
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return (1);
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}
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1999-04-19 21:31:43 +00:00
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static int nbiof_read(BIO *b, char *out, int outl)
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2015-01-22 03:40:55 +00:00
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{
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int ret = 0;
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int num;
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unsigned char n;
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1998-12-21 10:52:47 +00:00
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2015-01-22 03:40:55 +00:00
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if (out == NULL)
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return (0);
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if (b->next_bio == NULL)
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return (0);
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1998-12-21 10:52:47 +00:00
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2015-01-22 03:40:55 +00:00
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BIO_clear_retry_flags(b);
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2015-02-26 11:57:37 +00:00
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if (RAND_bytes(&n, 1) <= 0)
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return -1;
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2015-01-22 03:40:55 +00:00
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num = (n & 0x07);
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1998-12-21 10:52:47 +00:00
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2015-01-22 03:40:55 +00:00
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if (outl > num)
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outl = num;
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1998-12-21 10:52:47 +00:00
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2015-01-22 03:40:55 +00:00
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if (num == 0) {
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ret = -1;
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BIO_set_retry_read(b);
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2015-02-06 15:54:20 +00:00
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} else {
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2015-01-22 03:40:55 +00:00
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ret = BIO_read(b->next_bio, out, outl);
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if (ret < 0)
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BIO_copy_next_retry(b);
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}
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return (ret);
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}
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1998-12-21 10:52:47 +00:00
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2000-05-15 22:54:43 +00:00
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static int nbiof_write(BIO *b, const char *in, int inl)
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2015-01-22 03:40:55 +00:00
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{
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NBIO_TEST *nt;
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int ret = 0;
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int num;
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unsigned char n;
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1998-12-21 10:52:47 +00:00
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2015-01-22 03:40:55 +00:00
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if ((in == NULL) || (inl <= 0))
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return (0);
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if (b->next_bio == NULL)
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return (0);
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nt = (NBIO_TEST *)b->ptr;
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1998-12-21 10:52:47 +00:00
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2015-01-22 03:40:55 +00:00
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BIO_clear_retry_flags(b);
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1998-12-21 10:52:47 +00:00
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2015-01-22 03:40:55 +00:00
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if (nt->lwn > 0) {
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num = nt->lwn;
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nt->lwn = 0;
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} else {
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2015-02-26 11:57:37 +00:00
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if (RAND_bytes(&n, 1) <= 0)
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return -1;
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2015-01-22 03:40:55 +00:00
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num = (n & 7);
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}
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if (inl > num)
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inl = num;
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if (num == 0) {
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ret = -1;
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BIO_set_retry_write(b);
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2015-02-06 15:54:20 +00:00
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} else {
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2015-01-22 03:40:55 +00:00
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ret = BIO_write(b->next_bio, in, inl);
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if (ret < 0) {
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BIO_copy_next_retry(b);
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nt->lwn = inl;
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}
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}
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return (ret);
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}
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1998-12-21 10:52:47 +00:00
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2000-05-15 22:54:43 +00:00
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static long nbiof_ctrl(BIO *b, int cmd, long num, void *ptr)
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2015-01-22 03:40:55 +00:00
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{
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long ret;
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if (b->next_bio == NULL)
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return (0);
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switch (cmd) {
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case BIO_C_DO_STATE_MACHINE:
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BIO_clear_retry_flags(b);
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ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
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BIO_copy_next_retry(b);
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break;
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case BIO_CTRL_DUP:
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ret = 0L;
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break;
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default:
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ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
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break;
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}
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return (ret);
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}
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1998-12-21 10:52:47 +00:00
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2000-06-21 02:25:30 +00:00
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static long nbiof_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
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2015-01-22 03:40:55 +00:00
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{
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long ret = 1;
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if (b->next_bio == NULL)
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return (0);
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switch (cmd) {
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default:
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ret = BIO_callback_ctrl(b->next_bio, cmd, fp);
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break;
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}
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return (ret);
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}
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2000-02-20 23:43:02 +00:00
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1999-04-19 21:31:43 +00:00
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static int nbiof_gets(BIO *bp, char *buf, int size)
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2015-01-22 03:40:55 +00:00
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{
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if (bp->next_bio == NULL)
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return (0);
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return (BIO_gets(bp->next_bio, buf, size));
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}
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1998-12-21 10:52:47 +00:00
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2000-05-15 22:54:43 +00:00
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static int nbiof_puts(BIO *bp, const char *str)
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2015-01-22 03:40:55 +00:00
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{
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if (bp->next_bio == NULL)
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return (0);
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return (BIO_puts(bp->next_bio, str));
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}
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