Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/crypto/../../libssl/src/crypto/asn1/bio_asn1.c	Lines:	0	169	0.0 %
Date:	2016-12-06	Branches:	0	88	0.0 %


/* $OpenBSD: bio_asn1.c,v 1.12 2015/12/23 01:46:33 mmcc Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project.
 */
/* ====================================================================
 * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
 *
 * 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 above 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 acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED 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 OpenSSL PROJECT OR
 * ITS 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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

/* Experimental ASN1 BIO. When written through the data is converted
 * to an ASN1 string type: default is OCTET STRING. Additional functions
 * can be provided to add prefix and suffix data.
 */

#include <stdlib.h>
#include <string.h>

#include <openssl/bio.h>
#include <openssl/asn1.h>

/* Must be large enough for biggest tag+length */
#define DEFAULT_ASN1_BUF_SIZE 20

typedef enum {
	ASN1_STATE_START,
	ASN1_STATE_PRE_COPY,
	ASN1_STATE_HEADER,
	ASN1_STATE_HEADER_COPY,
	ASN1_STATE_DATA_COPY,
	ASN1_STATE_POST_COPY,
	ASN1_STATE_DONE
} asn1_bio_state_t;

typedef struct BIO_ASN1_EX_FUNCS_st {
	asn1_ps_func	*ex_func;
	asn1_ps_func	*ex_free_func;
} BIO_ASN1_EX_FUNCS;

typedef struct BIO_ASN1_BUF_CTX_t {
	/* Internal state */
	asn1_bio_state_t state;
	/* Internal buffer */
	unsigned char *buf;
	/* Size of buffer */
	int bufsize;
	/* Current position in buffer */
	int bufpos;
	/* Current buffer length */
	int buflen;
	/* Amount of data to copy */
	int copylen;
	/* Class and tag to use */
	int asn1_class, asn1_tag;
	asn1_ps_func *prefix, *prefix_free, *suffix, *suffix_free;
	/* Extra buffer for prefix and suffix data */
	unsigned char *ex_buf;
	int ex_len;
	int ex_pos;
	void *ex_arg;
} BIO_ASN1_BUF_CTX;


static int asn1_bio_write(BIO *h, const char *buf, int num);
static int asn1_bio_read(BIO *h, char *buf, int size);
static int asn1_bio_puts(BIO *h, const char *str);
static int asn1_bio_gets(BIO *h, char *str, int size);
static long asn1_bio_ctrl(BIO *h, int cmd, long arg1, void *arg2);
static int asn1_bio_new(BIO *h);
static int asn1_bio_free(BIO *data);
static long asn1_bio_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);

static int asn1_bio_init(BIO_ASN1_BUF_CTX *ctx, int size);
static int asn1_bio_flush_ex(BIO *b, BIO_ASN1_BUF_CTX *ctx,
    asn1_ps_func *cleanup, asn1_bio_state_t next);
static int asn1_bio_setup_ex(BIO *b, BIO_ASN1_BUF_CTX *ctx,
    asn1_ps_func *setup, asn1_bio_state_t ex_state,
    asn1_bio_state_t other_state);

static BIO_METHOD methods_asn1 = {
	.type = BIO_TYPE_ASN1,
	.name = "asn1",
	.bwrite = asn1_bio_write,
	.bread = asn1_bio_read,
	.bputs = asn1_bio_puts,
	.bgets = asn1_bio_gets,
	.ctrl = asn1_bio_ctrl,
	.create = asn1_bio_new,
	.destroy = asn1_bio_free,
	.callback_ctrl = asn1_bio_callback_ctrl
};

BIO_METHOD *
BIO_f_asn1(void)
{
	return (&methods_asn1);
}

static int
asn1_bio_new(BIO *b)
{
	BIO_ASN1_BUF_CTX *ctx;
	ctx = malloc(sizeof(BIO_ASN1_BUF_CTX));
	if (!ctx)
		return 0;
	if (!asn1_bio_init(ctx, DEFAULT_ASN1_BUF_SIZE)) {
		free(ctx);
		return 0;
	}
	b->init = 1;
	b->ptr = (char *)ctx;
	b->flags = 0;
	return 1;
}

static int
asn1_bio_init(BIO_ASN1_BUF_CTX *ctx, int size)
{
	ctx->buf = malloc(size);
	if (!ctx->buf)
		return 0;
	ctx->bufsize = size;
	ctx->bufpos = 0;
	ctx->buflen = 0;
	ctx->copylen = 0;
	ctx->asn1_class = V_ASN1_UNIVERSAL;
	ctx->asn1_tag = V_ASN1_OCTET_STRING;
	ctx->ex_buf = NULL;
	ctx->ex_pos = 0;
	ctx->ex_len = 0;
	ctx->state = ASN1_STATE_START;
	return 1;
}

static int
asn1_bio_free(BIO *b)
{
	BIO_ASN1_BUF_CTX *ctx;

	ctx = (BIO_ASN1_BUF_CTX *) b->ptr;
	if (ctx == NULL)
		return 0;
	free(ctx->buf);
	free(ctx);
	b->init = 0;
	b->ptr = NULL;
	b->flags = 0;
	return 1;
}

static int
asn1_bio_write(BIO *b, const char *in , int inl)
{
	BIO_ASN1_BUF_CTX *ctx;
	int wrmax, wrlen, ret, buflen;
	unsigned char *p;

	if (!in || (inl < 0) || (b->next_bio == NULL))
		return 0;
	ctx = (BIO_ASN1_BUF_CTX *) b->ptr;
	if (ctx == NULL)
		return 0;

	wrlen = 0;
	ret = -1;

	for (;;) {
		switch (ctx->state) {

			/* Setup prefix data, call it */
		case ASN1_STATE_START:
			if (!asn1_bio_setup_ex(b, ctx, ctx->prefix,
				    ASN1_STATE_PRE_COPY, ASN1_STATE_HEADER))
				return 0;
			break;

			/* Copy any pre data first */
		case ASN1_STATE_PRE_COPY:
			ret = asn1_bio_flush_ex(b, ctx, ctx->prefix_free,
			    ASN1_STATE_HEADER);
			if (ret <= 0)
				goto done;
			break;

		case ASN1_STATE_HEADER:
			buflen = ASN1_object_size(0, inl, ctx->asn1_tag) - inl;
			if (buflen <= 0 || buflen > ctx->bufsize)
				return -1;
			ctx->buflen = buflen;
			p = ctx->buf;
			ASN1_put_object(&p, 0, inl,
			    ctx->asn1_tag, ctx->asn1_class);
			ctx->copylen = inl;
			ctx->state = ASN1_STATE_HEADER_COPY;
			break;

		case ASN1_STATE_HEADER_COPY:
			ret = BIO_write(b->next_bio,
			    ctx->buf + ctx->bufpos, ctx->buflen);
			if (ret <= 0)
				goto done;

			ctx->buflen -= ret;
			if (ctx->buflen)
				ctx->bufpos += ret;
			else {
				ctx->bufpos = 0;
				ctx->state = ASN1_STATE_DATA_COPY;
			}
			break;

		case ASN1_STATE_DATA_COPY:

			if (inl > ctx->copylen)
				wrmax = ctx->copylen;
			else
				wrmax = inl;
			ret = BIO_write(b->next_bio, in, wrmax);
			if (ret <= 0)
				break;
			wrlen += ret;
			ctx->copylen -= ret;
			in += ret;
			inl -= ret;

			if (ctx->copylen == 0)
				ctx->state = ASN1_STATE_HEADER;
			if (inl == 0)
				goto done;
			break;

		default:
			BIO_clear_retry_flags(b);
			return 0;
		}

	}

done:
	BIO_clear_retry_flags(b);
	BIO_copy_next_retry(b);

	return (wrlen > 0) ? wrlen : ret;
}

static int
asn1_bio_flush_ex(BIO *b, BIO_ASN1_BUF_CTX *ctx, asn1_ps_func *cleanup,
    asn1_bio_state_t next)
{
	int ret;

	if (ctx->ex_len <= 0)
		return 1;
	for (;;) {
		ret = BIO_write(b->next_bio, ctx->ex_buf + ctx->ex_pos,
		    ctx->ex_len);
		if (ret <= 0)
			break;
		ctx->ex_len -= ret;
		if (ctx->ex_len > 0)
			ctx->ex_pos += ret;
		else {
			if (cleanup)
				cleanup(b, &ctx->ex_buf, &ctx->ex_len,
				    &ctx->ex_arg);
			ctx->state = next;
			ctx->ex_pos = 0;
			break;
		}
	}
	return ret;
}

static int
asn1_bio_setup_ex(BIO *b, BIO_ASN1_BUF_CTX *ctx, asn1_ps_func *setup,
    asn1_bio_state_t ex_state, asn1_bio_state_t other_state)
{
	if (setup && !setup(b, &ctx->ex_buf, &ctx->ex_len, &ctx->ex_arg)) {
		BIO_clear_retry_flags(b);
		return 0;
	}
	if (ctx->ex_len > 0)
		ctx->state = ex_state;
	else
		ctx->state = other_state;
	return 1;
}

static int
asn1_bio_read(BIO *b, char *in , int inl)
{
	if (!b->next_bio)
		return 0;
	return BIO_read(b->next_bio, in , inl);
}

static int
asn1_bio_puts(BIO *b, const char *str)
{
	return asn1_bio_write(b, str, strlen(str));
}

static int
asn1_bio_gets(BIO *b, char *str, int size)
{
	if (!b->next_bio)
		return 0;
	return BIO_gets(b->next_bio, str , size);
}

static long
asn1_bio_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
{
	if (b->next_bio == NULL)
		return (0);
	return BIO_callback_ctrl(b->next_bio, cmd, fp);
}

static long
asn1_bio_ctrl(BIO *b, int cmd, long arg1, void *arg2)
{
	BIO_ASN1_BUF_CTX *ctx;
	BIO_ASN1_EX_FUNCS *ex_func;
	long ret = 1;

	ctx = (BIO_ASN1_BUF_CTX *) b->ptr;
	if (ctx == NULL)
		return 0;
	switch (cmd) {

	case BIO_C_SET_PREFIX:
		ex_func = arg2;
		ctx->prefix = ex_func->ex_func;
		ctx->prefix_free = ex_func->ex_free_func;
		break;

	case BIO_C_GET_PREFIX:
		ex_func = arg2;
		ex_func->ex_func = ctx->prefix;
		ex_func->ex_free_func = ctx->prefix_free;
		break;

	case BIO_C_SET_SUFFIX:
		ex_func = arg2;
		ctx->suffix = ex_func->ex_func;
		ctx->suffix_free = ex_func->ex_free_func;
		break;

	case BIO_C_GET_SUFFIX:
		ex_func = arg2;
		ex_func->ex_func = ctx->suffix;
		ex_func->ex_free_func = ctx->suffix_free;
		break;

	case BIO_C_SET_EX_ARG:
		ctx->ex_arg = arg2;
		break;

	case BIO_C_GET_EX_ARG:
		*(void **)arg2 = ctx->ex_arg;
		break;

	case BIO_CTRL_FLUSH:
		if (!b->next_bio)
			return 0;

		/* Call post function if possible */
		if (ctx->state == ASN1_STATE_HEADER) {
			if (!asn1_bio_setup_ex(b, ctx, ctx->suffix,
			    ASN1_STATE_POST_COPY, ASN1_STATE_DONE))
				return 0;
		}

		if (ctx->state == ASN1_STATE_POST_COPY) {
			ret = asn1_bio_flush_ex(b, ctx, ctx->suffix_free,
			    ASN1_STATE_DONE);
			if (ret <= 0)
				return ret;
		}

		if (ctx->state == ASN1_STATE_DONE)
			return BIO_ctrl(b->next_bio, cmd, arg1, arg2);
		else {
			BIO_clear_retry_flags(b);
			return 0;
		}
		break;


	default:
		if (!b->next_bio)
			return 0;
		return BIO_ctrl(b->next_bio, cmd, arg1, arg2);

	}

	return ret;
}

static int
asn1_bio_set_ex(BIO *b, int cmd, asn1_ps_func *ex_func, asn1_ps_func
    *ex_free_func)
{
	BIO_ASN1_EX_FUNCS extmp;

	extmp.ex_func = ex_func;
	extmp.ex_free_func = ex_free_func;
	return BIO_ctrl(b, cmd, 0, &extmp);
}

static int
asn1_bio_get_ex(BIO *b, int cmd, asn1_ps_func **ex_func,
    asn1_ps_func **ex_free_func)
{
	BIO_ASN1_EX_FUNCS extmp;
	int ret;

	ret = BIO_ctrl(b, cmd, 0, &extmp);
	if (ret > 0) {
		*ex_func = extmp.ex_func;
		*ex_free_func = extmp.ex_free_func;
	}
	return ret;
}

int
BIO_asn1_set_prefix(BIO *b, asn1_ps_func *prefix, asn1_ps_func *prefix_free)
{
	return asn1_bio_set_ex(b, BIO_C_SET_PREFIX, prefix, prefix_free);
}

int
BIO_asn1_get_prefix(BIO *b, asn1_ps_func **pprefix, asn1_ps_func **pprefix_free)
{
	return asn1_bio_get_ex(b, BIO_C_GET_PREFIX, pprefix, pprefix_free);
}

int
BIO_asn1_set_suffix(BIO *b, asn1_ps_func *suffix, asn1_ps_func *suffix_free)
{
	return asn1_bio_set_ex(b, BIO_C_SET_SUFFIX, suffix, suffix_free);
}

int
BIO_asn1_get_suffix(BIO *b, asn1_ps_func **psuffix, asn1_ps_func **psuffix_free)
{
	return asn1_bio_get_ex(b, BIO_C_GET_SUFFIX, psuffix, psuffix_free);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: bio_asn1.c,v 1.12 2015/12/23 01:46:33 mmcc Exp $ */
2			/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3			* project.
4			*/
5			/* ====================================================================
6			* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			*
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			*
15			* 2. Redistributions in binary form must reproduce the above copyright
16			* notice, this list of conditions and the following disclaimer in
17			* the documentation and/or other materials provided with the
18			* distribution.
19			*
20			* 3. All advertising materials mentioning features or use of this
21			* software must display the following acknowledgment:
22			* "This product includes software developed by the OpenSSL Project
23			* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24			*
25			* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26			* endorse or promote products derived from this software without
27			* prior written permission. For written permission, please contact
28			* licensing@OpenSSL.org.
29			*
30			* 5. Products derived from this software may not be called "OpenSSL"
31			* nor may "OpenSSL" appear in their names without prior written
32			* permission of the OpenSSL Project.
33			*
34			* 6. Redistributions of any form whatsoever must retain the following
35			* acknowledgment:
36			* "This product includes software developed by the OpenSSL Project
37			* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38			*
39			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50			* OF THE POSSIBILITY OF SUCH DAMAGE.
51			* ====================================================================
52			*
53			* This product includes cryptographic software written by Eric Young
54			* (eay@cryptsoft.com). This product includes software written by Tim
55			* Hudson (tjh@cryptsoft.com).
56			*
57			*/
58
59			/* Experimental ASN1 BIO. When written through the data is converted
60			* to an ASN1 string type: default is OCTET STRING. Additional functions
61			* can be provided to add prefix and suffix data.
62			*/
63
64			#include <stdlib.h>
65			#include <string.h>
66
67			#include <openssl/bio.h>
68			#include <openssl/asn1.h>
69
70			/* Must be large enough for biggest tag+length */
71			#define DEFAULT_ASN1_BUF_SIZE 20
72
73			typedef enum {
74			ASN1_STATE_START,
75			ASN1_STATE_PRE_COPY,
76			ASN1_STATE_HEADER,
77			ASN1_STATE_HEADER_COPY,
78			ASN1_STATE_DATA_COPY,
79			ASN1_STATE_POST_COPY,
80			ASN1_STATE_DONE
81			} asn1_bio_state_t;
82
83			typedef struct BIO_ASN1_EX_FUNCS_st {
84			asn1_ps_func *ex_func;
85			asn1_ps_func *ex_free_func;
86			} BIO_ASN1_EX_FUNCS;
87
88			typedef struct BIO_ASN1_BUF_CTX_t {
89			/* Internal state */
90			asn1_bio_state_t state;
91			/* Internal buffer */
92			unsigned char *buf;
93			/* Size of buffer */
94			int bufsize;
95			/* Current position in buffer */
96			int bufpos;
97			/* Current buffer length */
98			int buflen;
99			/* Amount of data to copy */
100			int copylen;
101			/* Class and tag to use */
102			int asn1_class, asn1_tag;
103			asn1_ps_func prefix, prefix_free, suffix, suffix_free;
104			/* Extra buffer for prefix and suffix data */
105			unsigned char *ex_buf;
106			int ex_len;
107			int ex_pos;
108			void *ex_arg;
109			} BIO_ASN1_BUF_CTX;
110
111
112			static int asn1_bio_write(BIO h, const char buf, int num);
113			static int asn1_bio_read(BIO h, char buf, int size);
114			static int asn1_bio_puts(BIO h, const char str);
115			static int asn1_bio_gets(BIO h, char str, int size);
116			static long asn1_bio_ctrl(BIO h, int cmd, long arg1, void arg2);
117			static int asn1_bio_new(BIO *h);
118			static int asn1_bio_free(BIO *data);
119			static long asn1_bio_callback_ctrl(BIO h, int cmd, bio_info_cb fp);
120
121			static int asn1_bio_init(BIO_ASN1_BUF_CTX *ctx, int size);
122			static int asn1_bio_flush_ex(BIO b, BIO_ASN1_BUF_CTX ctx,
123			asn1_ps_func *cleanup, asn1_bio_state_t next);
124			static int asn1_bio_setup_ex(BIO b, BIO_ASN1_BUF_CTX ctx,
125			asn1_ps_func *setup, asn1_bio_state_t ex_state,
126			asn1_bio_state_t other_state);
127
128			static BIO_METHOD methods_asn1 = {
129			.type = BIO_TYPE_ASN1,
130			.name = "asn1",
131			.bwrite = asn1_bio_write,
132			.bread = asn1_bio_read,
133			.bputs = asn1_bio_puts,
134			.bgets = asn1_bio_gets,
135			.ctrl = asn1_bio_ctrl,
136			.create = asn1_bio_new,
137			.destroy = asn1_bio_free,
138			.callback_ctrl = asn1_bio_callback_ctrl
139			};
140
141			BIO_METHOD *
142			BIO_f_asn1(void)
143			{
144			return (&methods_asn1);
145			}
146
147			static int
148			asn1_bio_new(BIO *b)
149			{
150			BIO_ASN1_BUF_CTX *ctx;
151			ctx = malloc(sizeof(BIO_ASN1_BUF_CTX));
152			if (!ctx)
153			return 0;
154			if (!asn1_bio_init(ctx, DEFAULT_ASN1_BUF_SIZE)) {
155			free(ctx);
156			return 0;
157			}
158			b->init = 1;
159			b->ptr = (char *)ctx;
160			b->flags = 0;
161			return 1;
162			}
163
164			static int
165			asn1_bio_init(BIO_ASN1_BUF_CTX *ctx, int size)
166			{
167			ctx->buf = malloc(size);
168			if (!ctx->buf)
169			return 0;
170			ctx->bufsize = size;
171			ctx->bufpos = 0;
172			ctx->buflen = 0;
173			ctx->copylen = 0;
174			ctx->asn1_class = V_ASN1_UNIVERSAL;
175			ctx->asn1_tag = V_ASN1_OCTET_STRING;
176			ctx->ex_buf = NULL;
177			ctx->ex_pos = 0;
178			ctx->ex_len = 0;
179			ctx->state = ASN1_STATE_START;
180			return 1;
181			}
182
183			static int
184			asn1_bio_free(BIO *b)
185			{
186			BIO_ASN1_BUF_CTX *ctx;
187
188			ctx = (BIO_ASN1_BUF_CTX *) b->ptr;
189			if (ctx == NULL)
190			return 0;
191			free(ctx->buf);
192			free(ctx);
193			b->init = 0;
194			b->ptr = NULL;
195			b->flags = 0;
196			return 1;
197			}
198
199			static int
200			asn1_bio_write(BIO b, const char in , int inl)
201			{
202			BIO_ASN1_BUF_CTX *ctx;
203			int wrmax, wrlen, ret, buflen;
204			unsigned char *p;
205
206			if (!in \|\| (inl < 0) \|\| (b->next_bio == NULL))
207			return 0;
208			ctx = (BIO_ASN1_BUF_CTX *) b->ptr;
209			if (ctx == NULL)
210			return 0;
211
212			wrlen = 0;
213			ret = -1;
214
215			for (;;) {
216			switch (ctx->state) {
217
218			/* Setup prefix data, call it */
219			case ASN1_STATE_START:
220			if (!asn1_bio_setup_ex(b, ctx, ctx->prefix,
221			ASN1_STATE_PRE_COPY, ASN1_STATE_HEADER))
222			return 0;
223			break;
224
225			/* Copy any pre data first */
226			case ASN1_STATE_PRE_COPY:
227			ret = asn1_bio_flush_ex(b, ctx, ctx->prefix_free,
228			ASN1_STATE_HEADER);
229			if (ret <= 0)
230			goto done;
231			break;
232
233			case ASN1_STATE_HEADER:
234			buflen = ASN1_object_size(0, inl, ctx->asn1_tag) - inl;
235			if (buflen <= 0 \|\| buflen > ctx->bufsize)
236			return -1;
237			ctx->buflen = buflen;
238			p = ctx->buf;
239			ASN1_put_object(&p, 0, inl,
240			ctx->asn1_tag, ctx->asn1_class);
241			ctx->copylen = inl;
242			ctx->state = ASN1_STATE_HEADER_COPY;
243			break;
244
245			case ASN1_STATE_HEADER_COPY:
246			ret = BIO_write(b->next_bio,
247			ctx->buf + ctx->bufpos, ctx->buflen);
248			if (ret <= 0)
249			goto done;
250
251			ctx->buflen -= ret;
252			if (ctx->buflen)
253			ctx->bufpos += ret;
254			else {
255			ctx->bufpos = 0;
256			ctx->state = ASN1_STATE_DATA_COPY;
257			}
258			break;
259
260			case ASN1_STATE_DATA_COPY:
261
262			if (inl > ctx->copylen)
263			wrmax = ctx->copylen;
264			else
265			wrmax = inl;
266			ret = BIO_write(b->next_bio, in, wrmax);
267			if (ret <= 0)
268			break;
269			wrlen += ret;
270			ctx->copylen -= ret;
271			in += ret;
272			inl -= ret;
273
274			if (ctx->copylen == 0)
275			ctx->state = ASN1_STATE_HEADER;
276			if (inl == 0)
277			goto done;
278			break;
279
280			default:
281			BIO_clear_retry_flags(b);
282			return 0;
283			}
284
285			}
286
287			done:
288			BIO_clear_retry_flags(b);
289			BIO_copy_next_retry(b);
290
291			return (wrlen > 0) ? wrlen : ret;
292			}
293
294			static int
295			asn1_bio_flush_ex(BIO b, BIO_ASN1_BUF_CTX ctx, asn1_ps_func *cleanup,
296			asn1_bio_state_t next)
297			{
298			int ret;
299
300			if (ctx->ex_len <= 0)
301			return 1;
302			for (;;) {
303			ret = BIO_write(b->next_bio, ctx->ex_buf + ctx->ex_pos,
304			ctx->ex_len);
305			if (ret <= 0)
306			break;
307			ctx->ex_len -= ret;
308			if (ctx->ex_len > 0)
309			ctx->ex_pos += ret;
310			else {
311			if (cleanup)
312			cleanup(b, &ctx->ex_buf, &ctx->ex_len,
313			&ctx->ex_arg);
314			ctx->state = next;
315			ctx->ex_pos = 0;
316			break;
317			}
318			}
319			return ret;
320			}
321
322			static int
323			asn1_bio_setup_ex(BIO b, BIO_ASN1_BUF_CTX ctx, asn1_ps_func *setup,
324			asn1_bio_state_t ex_state, asn1_bio_state_t other_state)
325			{
326			if (setup && !setup(b, &ctx->ex_buf, &ctx->ex_len, &ctx->ex_arg)) {
327			BIO_clear_retry_flags(b);
328			return 0;
329			}
330			if (ctx->ex_len > 0)
331			ctx->state = ex_state;
332			else
333			ctx->state = other_state;
334			return 1;
335			}
336
337			static int
338			asn1_bio_read(BIO b, char in , int inl)
339			{
340			if (!b->next_bio)
341			return 0;
342			return BIO_read(b->next_bio, in , inl);
343			}
344
345			static int
346			asn1_bio_puts(BIO b, const char str)
347			{
348			return asn1_bio_write(b, str, strlen(str));
349			}
350
351			static int
352			asn1_bio_gets(BIO b, char str, int size)
353			{
354			if (!b->next_bio)
355			return 0;
356			return BIO_gets(b->next_bio, str , size);
357			}
358
359			static long
360			asn1_bio_callback_ctrl(BIO b, int cmd, bio_info_cb fp)
361			{
362			if (b->next_bio == NULL)
363			return (0);
364			return BIO_callback_ctrl(b->next_bio, cmd, fp);
365			}
366
367			static long
368			asn1_bio_ctrl(BIO b, int cmd, long arg1, void arg2)
369			{
370			BIO_ASN1_BUF_CTX *ctx;
371			BIO_ASN1_EX_FUNCS *ex_func;
372			long ret = 1;
373
374			ctx = (BIO_ASN1_BUF_CTX *) b->ptr;
375			if (ctx == NULL)
376			return 0;
377			switch (cmd) {
378
379			case BIO_C_SET_PREFIX:
380			ex_func = arg2;
381			ctx->prefix = ex_func->ex_func;
382			ctx->prefix_free = ex_func->ex_free_func;
383			break;
384
385			case BIO_C_GET_PREFIX:
386			ex_func = arg2;
387			ex_func->ex_func = ctx->prefix;
388			ex_func->ex_free_func = ctx->prefix_free;
389			break;
390
391			case BIO_C_SET_SUFFIX:
392			ex_func = arg2;
393			ctx->suffix = ex_func->ex_func;
394			ctx->suffix_free = ex_func->ex_free_func;
395			break;
396
397			case BIO_C_GET_SUFFIX:
398			ex_func = arg2;
399			ex_func->ex_func = ctx->suffix;
400			ex_func->ex_free_func = ctx->suffix_free;
401			break;
402
403			case BIO_C_SET_EX_ARG:
404			ctx->ex_arg = arg2;
405			break;
406
407			case BIO_C_GET_EX_ARG:
408			(void *)arg2 = ctx->ex_arg;
409			break;
410
411			case BIO_CTRL_FLUSH:
412			if (!b->next_bio)
413			return 0;
414
415			/* Call post function if possible */
416			if (ctx->state == ASN1_STATE_HEADER) {
417			if (!asn1_bio_setup_ex(b, ctx, ctx->suffix,
418			ASN1_STATE_POST_COPY, ASN1_STATE_DONE))
419			return 0;
420			}
421
422			if (ctx->state == ASN1_STATE_POST_COPY) {
423			ret = asn1_bio_flush_ex(b, ctx, ctx->suffix_free,
424			ASN1_STATE_DONE);
425			if (ret <= 0)
426			return ret;
427			}
428
429			if (ctx->state == ASN1_STATE_DONE)
430			return BIO_ctrl(b->next_bio, cmd, arg1, arg2);
431			else {
432			BIO_clear_retry_flags(b);
433			return 0;
434			}
435			break;
436
437
438			default:
439			if (!b->next_bio)
440			return 0;
441			return BIO_ctrl(b->next_bio, cmd, arg1, arg2);
442
443			}
444
445			return ret;
446			}
447
448			static int
449			asn1_bio_set_ex(BIO b, int cmd, asn1_ps_func ex_func, asn1_ps_func
450			*ex_free_func)
451			{
452			BIO_ASN1_EX_FUNCS extmp;
453
454			extmp.ex_func = ex_func;
455			extmp.ex_free_func = ex_free_func;
456			return BIO_ctrl(b, cmd, 0, &extmp);
457			}
458
459			static int
460			asn1_bio_get_ex(BIO b, int cmd, asn1_ps_func *ex_func,
461			asn1_ps_func **ex_free_func)
462			{
463			BIO_ASN1_EX_FUNCS extmp;
464			int ret;
465
466			ret = BIO_ctrl(b, cmd, 0, &extmp);
467			if (ret > 0) {
468			*ex_func = extmp.ex_func;
469			*ex_free_func = extmp.ex_free_func;
470			}
471			return ret;
472			}
473
474			int
475			BIO_asn1_set_prefix(BIO b, asn1_ps_func prefix, asn1_ps_func *prefix_free)
476			{
477			return asn1_bio_set_ex(b, BIO_C_SET_PREFIX, prefix, prefix_free);
478			}
479
480			int
481			BIO_asn1_get_prefix(BIO b, asn1_ps_func pprefix, asn1_ps_func *pprefix_free)
482			{
483			return asn1_bio_get_ex(b, BIO_C_GET_PREFIX, pprefix, pprefix_free);
484			}
485
486			int
487			BIO_asn1_set_suffix(BIO b, asn1_ps_func suffix, asn1_ps_func *suffix_free)
488			{
489			return asn1_bio_set_ex(b, BIO_C_SET_SUFFIX, suffix, suffix_free);
490			}
491
492			int
493			BIO_asn1_get_suffix(BIO b, asn1_ps_func psuffix, asn1_ps_func *psuffix_free)
494			{
495			return asn1_bio_get_ex(b, BIO_C_GET_SUFFIX, psuffix, psuffix_free);
496			}