Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/crypto/../../libssl/src/crypto/bio/bf_buff.c	Lines:	78	267	29.2 %
Date:	2016-12-06	Branches:	25	159	15.7 %


/* $OpenBSD: bf_buff.c,v 1.23 2015/07/19 18:29:31 miod 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 <errno.h>
#include <stdio.h>
#include <string.h>

#include <openssl/bio.h>
#include <openssl/err.h>

static int buffer_write(BIO *h, const char *buf, int num);
static int buffer_read(BIO *h, char *buf, int size);
static int buffer_puts(BIO *h, const char *str);
static int buffer_gets(BIO *h, char *str, int size);
static long buffer_ctrl(BIO *h, int cmd, long arg1, void *arg2);
static int buffer_new(BIO *h);
static int buffer_free(BIO *data);
static long buffer_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
#define DEFAULT_BUFFER_SIZE	4096

static BIO_METHOD methods_buffer = {
	.type = BIO_TYPE_BUFFER,
	.name = "buffer",
	.bwrite = buffer_write,
	.bread = buffer_read,
	.bputs = buffer_puts,
	.bgets = buffer_gets,
	.ctrl = buffer_ctrl,
	.create = buffer_new,
	.destroy = buffer_free,
	.callback_ctrl = buffer_callback_ctrl
};

BIO_METHOD *
BIO_f_buffer(void)
{
	return (&methods_buffer);
}

static int
buffer_new(BIO *bi)
{
	BIO_F_BUFFER_CTX *ctx;

	ctx = malloc(sizeof(BIO_F_BUFFER_CTX));
	if (ctx == NULL)
		return (0);
	ctx->ibuf = malloc(DEFAULT_BUFFER_SIZE);
	if (ctx->ibuf == NULL) {
		free(ctx);
		return (0);
	}
	ctx->obuf = malloc(DEFAULT_BUFFER_SIZE);
	if (ctx->obuf == NULL) {
		free(ctx->ibuf);
		free(ctx);
		return (0);
	}
	ctx->ibuf_size = DEFAULT_BUFFER_SIZE;
	ctx->obuf_size = DEFAULT_BUFFER_SIZE;
	ctx->ibuf_len = 0;
	ctx->ibuf_off = 0;
	ctx->obuf_len = 0;
	ctx->obuf_off = 0;

	bi->init = 1;
	bi->ptr = (char *)ctx;
	bi->flags = 0;
	return (1);
}

static int
buffer_free(BIO *a)
{
	BIO_F_BUFFER_CTX *b;

	if (a == NULL)
		return (0);
	b = (BIO_F_BUFFER_CTX *)a->ptr;
	free(b->ibuf);
	free(b->obuf);
	free(a->ptr);
	a->ptr = NULL;
	a->init = 0;
	a->flags = 0;
	return (1);
}

static int
buffer_read(BIO *b, char *out, int outl)
{
	int i, num = 0;
	BIO_F_BUFFER_CTX *ctx;

	if (out == NULL)
		return (0);
	ctx = (BIO_F_BUFFER_CTX *)b->ptr;

	if ((ctx == NULL) || (b->next_bio == NULL))
		return (0);
	num = 0;
	BIO_clear_retry_flags(b);

start:
	i = ctx->ibuf_len;
	/* If there is stuff left over, grab it */
	if (i != 0) {
		if (i > outl)
			i = outl;
		memcpy(out, &(ctx->ibuf[ctx->ibuf_off]), i);
		ctx->ibuf_off += i;
		ctx->ibuf_len -= i;
		num += i;
		if (outl == i)
			return (num);
		outl -= i;
		out += i;
	}

	/* We may have done a partial read. try to do more.
	 * We have nothing in the buffer.
	 * If we get an error and have read some data, just return it
	 * and let them retry to get the error again.
	 * copy direct to parent address space */
	if (outl > ctx->ibuf_size) {
		for (;;) {
			i = BIO_read(b->next_bio, out, outl);
			if (i <= 0) {
				BIO_copy_next_retry(b);
				if (i < 0)
					return ((num > 0) ? num : i);
				if (i == 0)
					return (num);
			}
			num += i;
			if (outl == i)
				return (num);
			out += i;
			outl -= i;
		}
	}
	/* else */

	/* we are going to be doing some buffering */
	i = BIO_read(b->next_bio, ctx->ibuf, ctx->ibuf_size);
	if (i <= 0) {
		BIO_copy_next_retry(b);
		if (i < 0)
			return ((num > 0) ? num : i);
		if (i == 0)
			return (num);
	}
	ctx->ibuf_off = 0;
	ctx->ibuf_len = i;

	/* Lets re-read using ourselves :-) */
	goto start;
}

static int
buffer_write(BIO *b, const char *in, int inl)
{
	int i, num = 0;
	BIO_F_BUFFER_CTX *ctx;

	if ((in == NULL) || (inl <= 0))
		return (0);
	ctx = (BIO_F_BUFFER_CTX *)b->ptr;
	if ((ctx == NULL) || (b->next_bio == NULL))
		return (0);

	BIO_clear_retry_flags(b);
start:
	i = ctx->obuf_size - (ctx->obuf_len + ctx->obuf_off);
	/* add to buffer and return */
	if (i >= inl) {
		memcpy(&(ctx->obuf[ctx->obuf_off + ctx->obuf_len]), in, inl);
		ctx->obuf_len += inl;
		return (num + inl);
	}
	/* else */
	/* stuff already in buffer, so add to it first, then flush */
	if (ctx->obuf_len != 0) {
		if (i > 0) /* lets fill it up if we can */
		{
			memcpy(&(ctx->obuf[ctx->obuf_off + ctx->obuf_len]), in, i);
			in += i;
			inl -= i;
			num += i;
			ctx->obuf_len += i;
		}
		/* we now have a full buffer needing flushing */
		for (;;) {
			i = BIO_write(b->next_bio, &(ctx->obuf[ctx->obuf_off]),
			    ctx->obuf_len);
			if (i <= 0) {
				BIO_copy_next_retry(b);

				if (i < 0)
					return ((num > 0) ? num : i);
				if (i == 0)
					return (num);
			}
			ctx->obuf_off += i;
			ctx->obuf_len -= i;
			if (ctx->obuf_len == 0)
				break;
		}
	}
	/* we only get here if the buffer has been flushed and we
	 * still have stuff to write */
	ctx->obuf_off = 0;

	/* we now have inl bytes to write */
	while (inl >= ctx->obuf_size) {
		i = BIO_write(b->next_bio, in, inl);
		if (i <= 0) {
			BIO_copy_next_retry(b);
			if (i < 0)
				return ((num > 0) ? num : i);
			if (i == 0)
				return (num);
		}
		num += i;
		in += i;
		inl -= i;
		if (inl == 0)
			return (num);
	}

	/* copy the rest into the buffer since we have only a small
	 * amount left */
	goto start;
}

static long
buffer_ctrl(BIO *b, int cmd, long num, void *ptr)
{
	BIO *dbio;
	BIO_F_BUFFER_CTX *ctx;
	long ret = 1;
	char *p1, *p2;
	int r, i, *ip;
	int ibs, obs;

	ctx = (BIO_F_BUFFER_CTX *)b->ptr;

	switch (cmd) {
	case BIO_CTRL_RESET:
		ctx->ibuf_off = 0;
		ctx->ibuf_len = 0;
		ctx->obuf_off = 0;
		ctx->obuf_len = 0;
		if (b->next_bio == NULL)
			return (0);
		ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
		break;
	case BIO_CTRL_INFO:
		ret = (long)ctx->obuf_len;
		break;
	case BIO_C_GET_BUFF_NUM_LINES:
		ret = 0;
		p1 = ctx->ibuf;
		for (i = 0; i < ctx->ibuf_len; i++) {
			if (p1[ctx->ibuf_off + i] == '\n')
				ret++;
		}
		break;
	case BIO_CTRL_WPENDING:
		ret = (long)ctx->obuf_len;
		if (ret == 0) {
			if (b->next_bio == NULL)
				return (0);
			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
		}
		break;
	case BIO_CTRL_PENDING:
		ret = (long)ctx->ibuf_len;
		if (ret == 0) {
			if (b->next_bio == NULL)
				return (0);
			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
		}
		break;
	case BIO_C_SET_BUFF_READ_DATA:
		if (num > ctx->ibuf_size) {
			p1 = malloc(num);
			if (p1 == NULL)
				goto malloc_error;
			free(ctx->ibuf);
			ctx->ibuf = p1;
		}
		ctx->ibuf_off = 0;
		ctx->ibuf_len = (int)num;
		memcpy(ctx->ibuf, ptr, num);
		ret = 1;
		break;
	case BIO_C_SET_BUFF_SIZE:
		if (ptr != NULL) {
			ip = (int *)ptr;
			if (*ip == 0) {
				ibs = (int)num;
				obs = ctx->obuf_size;
			}
			else /* if (*ip == 1) */
			{
				ibs = ctx->ibuf_size;
				obs = (int)num;
			}
		} else {
			ibs = (int)num;
			obs = (int)num;
		}
		p1 = ctx->ibuf;
		p2 = ctx->obuf;
		if ((ibs > DEFAULT_BUFFER_SIZE) && (ibs != ctx->ibuf_size)) {
			p1 = malloc(num);
			if (p1 == NULL)
				goto malloc_error;
		}
		if ((obs > DEFAULT_BUFFER_SIZE) && (obs != ctx->obuf_size)) {
			p2 = malloc(num);
			if (p2 == NULL) {
				if (p1 != ctx->ibuf)
					free(p1);
				goto malloc_error;
			}
		}
		if (ctx->ibuf != p1) {
			free(ctx->ibuf);
			ctx->ibuf = p1;
			ctx->ibuf_off = 0;
			ctx->ibuf_len = 0;
			ctx->ibuf_size = ibs;
		}
		if (ctx->obuf != p2) {
			free(ctx->obuf);
			ctx->obuf = p2;
			ctx->obuf_off = 0;
			ctx->obuf_len = 0;
			ctx->obuf_size = obs;
		}
		break;
	case BIO_C_DO_STATE_MACHINE:
		if (b->next_bio == NULL)
			return (0);
		BIO_clear_retry_flags(b);
		ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
		BIO_copy_next_retry(b);
		break;

	case BIO_CTRL_FLUSH:
		if (b->next_bio == NULL)
			return (0);
		if (ctx->obuf_len <= 0) {
			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
			break;
		}

		for (;;) {
			BIO_clear_retry_flags(b);
			if (ctx->obuf_len > 0) {
				r = BIO_write(b->next_bio,
				    &(ctx->obuf[ctx->obuf_off]),
				    ctx->obuf_len);
				BIO_copy_next_retry(b);
				if (r <= 0)
					return ((long)r);
				ctx->obuf_off += r;
				ctx->obuf_len -= r;
			} else {
				ctx->obuf_len = 0;
				ctx->obuf_off = 0;
				break;
			}
		}
		ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
		break;
	case BIO_CTRL_DUP:
		dbio = (BIO *)ptr;
		if (!BIO_set_read_buffer_size(dbio, ctx->ibuf_size) ||
		    !BIO_set_write_buffer_size(dbio, ctx->obuf_size))
			ret = 0;
		break;
	default:
		if (b->next_bio == NULL)
			return (0);
		ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
		break;
	}
	return (ret);
malloc_error:
	BIOerr(BIO_F_BUFFER_CTRL, ERR_R_MALLOC_FAILURE);
	return (0);
}

static long
buffer_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
buffer_gets(BIO *b, char *buf, int size)
{
	BIO_F_BUFFER_CTX *ctx;
	int num = 0, i, flag;
	char *p;

	ctx = (BIO_F_BUFFER_CTX *)b->ptr;
	size--; /* reserve space for a '\0' */
	BIO_clear_retry_flags(b);

	for (;;) {
		if (ctx->ibuf_len > 0) {
			p = &(ctx->ibuf[ctx->ibuf_off]);
			flag = 0;
			for (i = 0; (i < ctx->ibuf_len) && (i < size); i++) {
				*(buf++) = p[i];
				if (p[i] == '\n') {
					flag = 1;
					i++;
					break;
				}
			}
			num += i;
			size -= i;
			ctx->ibuf_len -= i;
			ctx->ibuf_off += i;
			if (flag || size == 0) {
				*buf = '\0';
				return (num);
			}
		}
		else	/* read another chunk */
		{
			i = BIO_read(b->next_bio, ctx->ibuf, ctx->ibuf_size);
			if (i <= 0) {
				BIO_copy_next_retry(b);
				*buf = '\0';
				if (i < 0)
					return ((num > 0) ? num : i);
				if (i == 0)
					return (num);
			}
			ctx->ibuf_len = i;
			ctx->ibuf_off = 0;
		}
	}
}

static int
buffer_puts(BIO *b, const char *str)
{
	return (buffer_write(b, str, strlen(str)));
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: bf_buff.c,v 1.23 2015/07/19 18:29:31 miod Exp $ */
2			/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3			* All rights reserved.
4			*
5			* This package is an SSL implementation written
6			* by Eric Young (eay@cryptsoft.com).
7			* The implementation was written so as to conform with Netscapes SSL.
8			*
9			* This library is free for commercial and non-commercial use as long as
10			* the following conditions are aheared to. The following conditions
11			* apply to all code found in this distribution, be it the RC4, RSA,
12			* lhash, DES, etc., code; not just the SSL code. The SSL documentation
13			* included with this distribution is covered by the same copyright terms
14			* except that the holder is Tim Hudson (tjh@cryptsoft.com).
15			*
16			* Copyright remains Eric Young's, and as such any Copyright notices in
17			* the code are not to be removed.
18			* If this package is used in a product, Eric Young should be given attribution
19			* as the author of the parts of the library used.
20			* This can be in the form of a textual message at program startup or
21			* in documentation (online or textual) provided with the package.
22			*
23			* Redistribution and use in source and binary forms, with or without
24			* modification, are permitted provided that the following conditions
25			* are met:
26			* 1. Redistributions of source code must retain the copyright
27			* notice, this list of conditions and the following disclaimer.
28			* 2. Redistributions in binary form must reproduce the above copyright
29			* notice, this list of conditions and the following disclaimer in the
30			* documentation and/or other materials provided with the distribution.
31			* 3. All advertising materials mentioning features or use of this software
32			* must display the following acknowledgement:
33			* "This product includes cryptographic software written by
34			* Eric Young (eay@cryptsoft.com)"
35			* The word 'cryptographic' can be left out if the rouines from the library
36			* being used are not cryptographic related :-).
37			* 4. If you include any Windows specific code (or a derivative thereof) from
38			* the apps directory (application code) you must include an acknowledgement:
39			* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40			*
41			* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51			* SUCH DAMAGE.
52			*
53			* The licence and distribution terms for any publically available version or
54			* derivative of this code cannot be changed. i.e. this code cannot simply be
55			* copied and put under another distribution licence
56			* [including the GNU Public Licence.]
57			*/
58
59			#include <errno.h>
60			#include <stdio.h>
61			#include <string.h>
62
63			#include <openssl/bio.h>
64			#include <openssl/err.h>
65
66			static int buffer_write(BIO h, const char buf, int num);
67			static int buffer_read(BIO h, char buf, int size);
68			static int buffer_puts(BIO h, const char str);
69			static int buffer_gets(BIO h, char str, int size);
70			static long buffer_ctrl(BIO h, int cmd, long arg1, void arg2);
71			static int buffer_new(BIO *h);
72			static int buffer_free(BIO *data);
73			static long buffer_callback_ctrl(BIO h, int cmd, bio_info_cb fp);
74			#define DEFAULT_BUFFER_SIZE 4096
75
76			static BIO_METHOD methods_buffer = {
77			.type = BIO_TYPE_BUFFER,
78			.name = "buffer",
79			.bwrite = buffer_write,
80			.bread = buffer_read,
81			.bputs = buffer_puts,
82			.bgets = buffer_gets,
83			.ctrl = buffer_ctrl,
84			.create = buffer_new,
85			.destroy = buffer_free,
86			.callback_ctrl = buffer_callback_ctrl
87			};
88
89			BIO_METHOD *
90			BIO_f_buffer(void)
91		5	{
92		5	return (&methods_buffer);
93			}
94
95			static int
96			buffer_new(BIO *bi)
97		5	{
98			BIO_F_BUFFER_CTX *ctx;
99
100		5	ctx = malloc(sizeof(BIO_F_BUFFER_CTX));
101	✗✓	5	if (ctx == NULL)
102			return (0);
103		5	ctx->ibuf = malloc(DEFAULT_BUFFER_SIZE);
104	✗✓	5	if (ctx->ibuf == NULL) {
105			free(ctx);
106			return (0);
107			}
108		5	ctx->obuf = malloc(DEFAULT_BUFFER_SIZE);
109	✗✓	5	if (ctx->obuf == NULL) {
110			free(ctx->ibuf);
111			free(ctx);
112			return (0);
113			}
114		5	ctx->ibuf_size = DEFAULT_BUFFER_SIZE;
115		5	ctx->obuf_size = DEFAULT_BUFFER_SIZE;
116		5	ctx->ibuf_len = 0;
117		5	ctx->ibuf_off = 0;
118		5	ctx->obuf_len = 0;
119		5	ctx->obuf_off = 0;
120
121		5	bi->init = 1;
122		5	bi->ptr = (char *)ctx;
123		5	bi->flags = 0;
124		5	return (1);
125			}
126
127			static int
128			buffer_free(BIO *a)
129		5	{
130			BIO_F_BUFFER_CTX *b;
131
132	✗✓	5	if (a == NULL)
133			return (0);
134		5	b = (BIO_F_BUFFER_CTX *)a->ptr;
135		5	free(b->ibuf);
136		5	free(b->obuf);
137		5	free(a->ptr);
138		5	a->ptr = NULL;
139		5	a->init = 0;
140		5	a->flags = 0;
141		5	return (1);
142			}
143
144			static int
145			buffer_read(BIO b, char out, int outl)
146			{
147			int i, num = 0;
148			BIO_F_BUFFER_CTX *ctx;
149
150			if (out == NULL)
151			return (0);
152			ctx = (BIO_F_BUFFER_CTX *)b->ptr;
153
154			if ((ctx == NULL) \|\| (b->next_bio == NULL))
155			return (0);
156			num = 0;
157			BIO_clear_retry_flags(b);
158
159			start:
160			i = ctx->ibuf_len;
161			/* If there is stuff left over, grab it */
162			if (i != 0) {
163			if (i > outl)
164			i = outl;
165			memcpy(out, &(ctx->ibuf[ctx->ibuf_off]), i);
166			ctx->ibuf_off += i;
167			ctx->ibuf_len -= i;
168			num += i;
169			if (outl == i)
170			return (num);
171			outl -= i;
172			out += i;
173			}
174
175			/* We may have done a partial read. try to do more.
176			* We have nothing in the buffer.
177			* If we get an error and have read some data, just return it
178			* and let them retry to get the error again.
179			* copy direct to parent address space */
180			if (outl > ctx->ibuf_size) {
181			for (;;) {
182			i = BIO_read(b->next_bio, out, outl);
183			if (i <= 0) {
184			BIO_copy_next_retry(b);
185			if (i < 0)
186			return ((num > 0) ? num : i);
187			if (i == 0)
188			return (num);
189			}
190			num += i;
191			if (outl == i)
192			return (num);
193			out += i;
194			outl -= i;
195			}
196			}
197			/* else */
198
199			/* we are going to be doing some buffering */
200			i = BIO_read(b->next_bio, ctx->ibuf, ctx->ibuf_size);
201			if (i <= 0) {
202			BIO_copy_next_retry(b);
203			if (i < 0)
204			return ((num > 0) ? num : i);
205			if (i == 0)
206			return (num);
207			}
208			ctx->ibuf_off = 0;
209			ctx->ibuf_len = i;
210
211			/* Lets re-read using ourselves :-) */
212			goto start;
213			}
214
215			static int
216			buffer_write(BIO b, const char in, int inl)
217		51	{
218		51	int i, num = 0;
219			BIO_F_BUFFER_CTX *ctx;
220
221	✗✓	51	if ((in == NULL) \|\| (inl <= 0))
222			return (0);
223		51	ctx = (BIO_F_BUFFER_CTX *)b->ptr;
224	✓✗✗✓	51	if ((ctx == NULL) \|\| (b->next_bio == NULL))
225			return (0);
226
227		51	BIO_clear_retry_flags(b);
228		51	start:
229		51	i = ctx->obuf_size - (ctx->obuf_len + ctx->obuf_off);
230			/* add to buffer and return */
231	✓✗	51	if (i >= inl) {
232		51	memcpy(&(ctx->obuf[ctx->obuf_off + ctx->obuf_len]), in, inl);
233		51	ctx->obuf_len += inl;
234		51	return (num + inl);
235			}
236			/* else */
237			/* stuff already in buffer, so add to it first, then flush */
238			if (ctx->obuf_len != 0) {
239			if (i > 0) /* lets fill it up if we can */
240			{
241			memcpy(&(ctx->obuf[ctx->obuf_off + ctx->obuf_len]), in, i);
242			in += i;
243			inl -= i;
244			num += i;
245			ctx->obuf_len += i;
246			}
247			/* we now have a full buffer needing flushing */
248			for (;;) {
249			i = BIO_write(b->next_bio, &(ctx->obuf[ctx->obuf_off]),
250			ctx->obuf_len);
251			if (i <= 0) {
252			BIO_copy_next_retry(b);
253
254			if (i < 0)
255			return ((num > 0) ? num : i);
256			if (i == 0)
257			return (num);
258			}
259			ctx->obuf_off += i;
260			ctx->obuf_len -= i;
261			if (ctx->obuf_len == 0)
262			break;
263			}
264			}
265			/* we only get here if the buffer has been flushed and we
266			* still have stuff to write */
267			ctx->obuf_off = 0;
268
269			/* we now have inl bytes to write */
270			while (inl >= ctx->obuf_size) {
271			i = BIO_write(b->next_bio, in, inl);
272			if (i <= 0) {
273			BIO_copy_next_retry(b);
274			if (i < 0)
275			return ((num > 0) ? num : i);
276			if (i == 0)
277			return (num);
278			}
279			num += i;
280			in += i;
281			inl -= i;
282			if (inl == 0)
283			return (num);
284			}
285
286			/* copy the rest into the buffer since we have only a small
287			* amount left */
288			goto start;
289			}
290
291			static long
292			buffer_ctrl(BIO b, int cmd, long num, void ptr)
293		19	{
294			BIO *dbio;
295			BIO_F_BUFFER_CTX *ctx;
296		19	long ret = 1;
297			char p1, p2;
298			int r, i, *ip;
299			int ibs, obs;
300
301		19	ctx = (BIO_F_BUFFER_CTX *)b->ptr;
302
303	✓✗✗✗ ✗✗✓✗ ✓✗✓	19	switch (cmd) {
304			case BIO_CTRL_RESET:
305		2	ctx->ibuf_off = 0;
306		2	ctx->ibuf_len = 0;
307		2	ctx->obuf_off = 0;
308		2	ctx->obuf_len = 0;
309	✓✗	2	if (b->next_bio == NULL)
310		2	return (0);
311			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
312			break;
313			case BIO_CTRL_INFO:
314			ret = (long)ctx->obuf_len;
315			break;
316			case BIO_C_GET_BUFF_NUM_LINES:
317			ret = 0;
318			p1 = ctx->ibuf;
319			for (i = 0; i < ctx->ibuf_len; i++) {
320			if (p1[ctx->ibuf_off + i] == '\n')
321			ret++;
322			}
323			break;
324			case BIO_CTRL_WPENDING:
325			ret = (long)ctx->obuf_len;
326			if (ret == 0) {
327			if (b->next_bio == NULL)
328			return (0);
329			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
330			}
331			break;
332			case BIO_CTRL_PENDING:
333			ret = (long)ctx->ibuf_len;
334			if (ret == 0) {
335			if (b->next_bio == NULL)
336			return (0);
337			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
338			}
339			break;
340			case BIO_C_SET_BUFF_READ_DATA:
341			if (num > ctx->ibuf_size) {
342			p1 = malloc(num);
343			if (p1 == NULL)
344			goto malloc_error;
345			free(ctx->ibuf);
346			ctx->ibuf = p1;
347			}
348			ctx->ibuf_off = 0;
349			ctx->ibuf_len = (int)num;
350			memcpy(ctx->ibuf, ptr, num);
351			ret = 1;
352			break;
353			case BIO_C_SET_BUFF_SIZE:
354	✓✗	2	if (ptr != NULL) {
355		2	ip = (int *)ptr;
356	✓✗	2	if (*ip == 0) {
357		2	ibs = (int)num;
358		2	obs = ctx->obuf_size;
359			}
360			else /* if (ip == 1) /
361			{
362			ibs = ctx->ibuf_size;
363			obs = (int)num;
364			}
365			} else {
366			ibs = (int)num;
367			obs = (int)num;
368			}
369		2	p1 = ctx->ibuf;
370		2	p2 = ctx->obuf;
371	✗✓✗✗	2	if ((ibs > DEFAULT_BUFFER_SIZE) && (ibs != ctx->ibuf_size)) {
372			p1 = malloc(num);
373			if (p1 == NULL)
374			goto malloc_error;
375			}
376	✗✓✗✗	2	if ((obs > DEFAULT_BUFFER_SIZE) && (obs != ctx->obuf_size)) {
377			p2 = malloc(num);
378			if (p2 == NULL) {
379			if (p1 != ctx->ibuf)
380			free(p1);
381			goto malloc_error;
382			}
383			}
384	✗✓	2	if (ctx->ibuf != p1) {
385			free(ctx->ibuf);
386			ctx->ibuf = p1;
387			ctx->ibuf_off = 0;
388			ctx->ibuf_len = 0;
389			ctx->ibuf_size = ibs;
390			}
391	✗✓	2	if (ctx->obuf != p2) {
392			free(ctx->obuf);
393			ctx->obuf = p2;
394			ctx->obuf_off = 0;
395			ctx->obuf_len = 0;
396			ctx->obuf_size = obs;
397			}
398			break;
399			case BIO_C_DO_STATE_MACHINE:
400			if (b->next_bio == NULL)
401			return (0);
402			BIO_clear_retry_flags(b);
403			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
404			BIO_copy_next_retry(b);
405			break;
406
407			case BIO_CTRL_FLUSH:
408	✗✓	5	if (b->next_bio == NULL)
409			return (0);
410	✗✓	5	if (ctx->obuf_len <= 0) {
411			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
412			break;
413			}
414
415			for (;;) {
416		10	BIO_clear_retry_flags(b);
417	✓✓	10	if (ctx->obuf_len > 0) {
418		5	r = BIO_write(b->next_bio,
419			&(ctx->obuf[ctx->obuf_off]),
420			ctx->obuf_len);
421		5	BIO_copy_next_retry(b);
422	✗✓	5	if (r <= 0)
423			return ((long)r);
424		5	ctx->obuf_off += r;
425		5	ctx->obuf_len -= r;
426			} else {
427		5	ctx->obuf_len = 0;
428		5	ctx->obuf_off = 0;
429			break;
430			}
431			}
432		5	ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
433		5	break;
434			case BIO_CTRL_DUP:
435			dbio = (BIO *)ptr;
436			if (!BIO_set_read_buffer_size(dbio, ctx->ibuf_size) \|\|
437			!BIO_set_write_buffer_size(dbio, ctx->obuf_size))
438			ret = 0;
439			break;
440			default:
441	✗✓	10	if (b->next_bio == NULL)
442			return (0);
443		10	ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
444			break;
445			}
446		17	return (ret);
447			malloc_error:
448			BIOerr(BIO_F_BUFFER_CTRL, ERR_R_MALLOC_FAILURE);
449			return (0);
450			}
451
452			static long
453			buffer_callback_ctrl(BIO b, int cmd, bio_info_cb fp)
454			{
455			long ret = 1;
456
457			if (b->next_bio == NULL)
458			return (0);
459			switch (cmd) {
460			default:
461			ret = BIO_callback_ctrl(b->next_bio, cmd, fp);
462			break;
463			}
464			return (ret);
465			}
466
467			static int
468			buffer_gets(BIO b, char buf, int size)
469			{
470			BIO_F_BUFFER_CTX *ctx;
471			int num = 0, i, flag;
472			char *p;
473
474			ctx = (BIO_F_BUFFER_CTX *)b->ptr;
475			size--; /* reserve space for a '\0' */
476			BIO_clear_retry_flags(b);
477
478			for (;;) {
479			if (ctx->ibuf_len > 0) {
480			p = &(ctx->ibuf[ctx->ibuf_off]);
481			flag = 0;
482			for (i = 0; (i < ctx->ibuf_len) && (i < size); i++) {
483			*(buf++) = p[i];
484			if (p[i] == '\n') {
485			flag = 1;
486			i++;
487			break;
488			}
489			}
490			num += i;
491			size -= i;
492			ctx->ibuf_len -= i;
493			ctx->ibuf_off += i;
494			if (flag \|\| size == 0) {
495			*buf = '\0';
496			return (num);
497			}
498			}
499			else /* read another chunk */
500			{
501			i = BIO_read(b->next_bio, ctx->ibuf, ctx->ibuf_size);
502			if (i <= 0) {
503			BIO_copy_next_retry(b);
504			*buf = '\0';
505			if (i < 0)
506			return ((num > 0) ? num : i);
507			if (i == 0)
508			return (num);
509			}
510			ctx->ibuf_len = i;
511			ctx->ibuf_off = 0;
512			}
513			}
514			}
515
516			static int
517			buffer_puts(BIO b, const char str)
518			{
519			return (buffer_write(b, str, strlen(str)));
520			}