Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/crypto/../../libssl/src/crypto/evp/bio_enc.c	Lines:	118	172	68.6 %
Date:	2016-12-06	Branches:	40	84	47.6 %


/* $OpenBSD: bio_enc.c,v 1.19 2015/09/10 15:56:25 jsing 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/buffer.h>
#include <openssl/evp.h>

static int enc_write(BIO *h, const char *buf, int num);
static int enc_read(BIO *h, char *buf, int size);
/*static int enc_puts(BIO *h, const char *str); */
/*static int enc_gets(BIO *h, char *str, int size); */
static long enc_ctrl(BIO *h, int cmd, long arg1, void *arg2);
static int enc_new(BIO *h);
static int enc_free(BIO *data);
static long enc_callback_ctrl(BIO *h, int cmd, bio_info_cb *fps);
#define ENC_BLOCK_SIZE	(1024*4)
#define BUF_OFFSET	(EVP_MAX_BLOCK_LENGTH*2)

typedef struct enc_struct {
	int buf_len;
	int buf_off;
	int cont;		/* <= 0 when finished */
	int finished;
	int ok;			/* bad decrypt */
	EVP_CIPHER_CTX cipher;
	/* buf is larger than ENC_BLOCK_SIZE because EVP_DecryptUpdate
	 * can return up to a block more data than is presented to it
	 */
	char buf[ENC_BLOCK_SIZE + BUF_OFFSET + 2];
} BIO_ENC_CTX;

static BIO_METHOD methods_enc = {
	.type = BIO_TYPE_CIPHER,
	.name = "cipher",
	.bwrite = enc_write,
	.bread = enc_read,
	.ctrl = enc_ctrl,
	.create = enc_new,
	.destroy = enc_free,
	.callback_ctrl = enc_callback_ctrl
};

BIO_METHOD *
BIO_f_cipher(void)
{
	return (&methods_enc);
}

static int
enc_new(BIO *bi)
{
	BIO_ENC_CTX *ctx;

	ctx = malloc(sizeof(BIO_ENC_CTX));
	if (ctx == NULL)
		return (0);
	EVP_CIPHER_CTX_init(&ctx->cipher);

	ctx->buf_len = 0;
	ctx->buf_off = 0;
	ctx->cont = 1;
	ctx->finished = 0;
	ctx->ok = 1;

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

static int
enc_free(BIO *a)
{
	BIO_ENC_CTX *b;

	if (a == NULL)
		return (0);
	b = (BIO_ENC_CTX *)a->ptr;
	EVP_CIPHER_CTX_cleanup(&(b->cipher));
	explicit_bzero(a->ptr, sizeof(BIO_ENC_CTX));
	free(a->ptr);
	a->ptr = NULL;
	a->init = 0;
	a->flags = 0;
	return (1);
}

static int
enc_read(BIO *b, char *out, int outl)
{
	int ret = 0, i;
	BIO_ENC_CTX *ctx;

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

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

	/* First check if there are bytes decoded/encoded */
	if (ctx->buf_len > 0) {
		i = ctx->buf_len - ctx->buf_off;
		if (i > outl)
			i = outl;
		memcpy(out, &(ctx->buf[ctx->buf_off]), i);
		ret = i;
		out += i;
		outl -= i;
		ctx->buf_off += i;
		if (ctx->buf_len == ctx->buf_off) {
			ctx->buf_len = 0;
			ctx->buf_off = 0;
		}
	}

	/* At this point, we have room of outl bytes and an empty
	 * buffer, so we should read in some more. */

	while (outl > 0) {
		if (ctx->cont <= 0)
			break;

		/* read in at IV offset, read the EVP_Cipher
		 * documentation about why */
		i = BIO_read(b->next_bio, &(ctx->buf[BUF_OFFSET]), ENC_BLOCK_SIZE);

		if (i <= 0) {
			/* Should be continue next time we are called? */
			if (!BIO_should_retry(b->next_bio)) {
				ctx->cont = i;
				i = EVP_CipherFinal_ex(&(ctx->cipher),
				    (unsigned char *)ctx->buf,
				    &(ctx->buf_len));
				ctx->ok = i;
				ctx->buf_off = 0;
			} else {
				ret = (ret == 0) ? i : ret;
				break;
			}
		} else {
			EVP_CipherUpdate(&(ctx->cipher),
			    (unsigned char *)ctx->buf, &ctx->buf_len,
			    (unsigned char *)&(ctx->buf[BUF_OFFSET]), i);
			ctx->cont = 1;
			/* Note: it is possible for EVP_CipherUpdate to
			 * decrypt zero bytes because this is or looks like
			 * the final block: if this happens we should retry
			 * and either read more data or decrypt the final
			 * block
			 */
			if (ctx->buf_len == 0)
				continue;
		}

		if (ctx->buf_len <= outl)
			i = ctx->buf_len;
		else
			i = outl;
		if (i <= 0)
			break;
		memcpy(out, ctx->buf, i);
		ret += i;
		ctx->buf_off = i;
		outl -= i;
		out += i;
	}

	BIO_clear_retry_flags(b);
	BIO_copy_next_retry(b);
	return ((ret == 0) ? ctx->cont : ret);
}

static int
enc_write(BIO *b, const char *in, int inl)
{
	int ret = 0, n, i;
	BIO_ENC_CTX *ctx;

	ctx = (BIO_ENC_CTX *)b->ptr;
	ret = inl;

	BIO_clear_retry_flags(b);
	n = ctx->buf_len - ctx->buf_off;
	while (n > 0) {
		i = BIO_write(b->next_bio, &(ctx->buf[ctx->buf_off]), n);
		if (i <= 0) {
			BIO_copy_next_retry(b);
			return (i);
		}
		ctx->buf_off += i;
		n -= i;
	}
	/* at this point all pending data has been written */

	if ((in == NULL) || (inl <= 0))
		return (0);

	ctx->buf_off = 0;
	while (inl > 0) {
		n = (inl > ENC_BLOCK_SIZE) ? ENC_BLOCK_SIZE : inl;
		EVP_CipherUpdate(&(ctx->cipher),
		    (unsigned char *)ctx->buf, &ctx->buf_len,
		    (unsigned char *)in, n);
		inl -= n;
		in += n;

		ctx->buf_off = 0;
		n = ctx->buf_len;
		while (n > 0) {
			i = BIO_write(b->next_bio, &(ctx->buf[ctx->buf_off]), n);
			if (i <= 0) {
				BIO_copy_next_retry(b);
				return (ret == inl) ? i : ret - inl;
			}
			n -= i;
			ctx->buf_off += i;
		}
		ctx->buf_len = 0;
		ctx->buf_off = 0;
	}
	BIO_copy_next_retry(b);
	return (ret);
}

static long
enc_ctrl(BIO *b, int cmd, long num, void *ptr)
{
	BIO *dbio;
	BIO_ENC_CTX *ctx, *dctx;
	long ret = 1;
	int i;
	EVP_CIPHER_CTX **c_ctx;

	ctx = (BIO_ENC_CTX *)b->ptr;

	switch (cmd) {
	case BIO_CTRL_RESET:
		ctx->ok = 1;
		ctx->finished = 0;
		EVP_CipherInit_ex(&(ctx->cipher), NULL, NULL, NULL, NULL,
		    ctx->cipher.encrypt);
		ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
		break;
	case BIO_CTRL_EOF:	/* More to read */
		if (ctx->cont <= 0)
			ret = 1;
		else
			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
		break;
	case BIO_CTRL_WPENDING:
		ret = ctx->buf_len - ctx->buf_off;
		if (ret <= 0)
			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
		break;
	case BIO_CTRL_PENDING: /* More to read in buffer */
		ret = ctx->buf_len - ctx->buf_off;
		if (ret <= 0)
			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
		break;
	case BIO_CTRL_FLUSH:
		/* do a final write */
again:
		while (ctx->buf_len != ctx->buf_off) {
			i = enc_write(b, NULL, 0);
			if (i < 0)
				return i;
		}

		if (!ctx->finished) {
			ctx->finished = 1;
			ctx->buf_off = 0;
			ret = EVP_CipherFinal_ex(&(ctx->cipher),
			    (unsigned char *)ctx->buf,
			    &(ctx->buf_len));
			ctx->ok = (int)ret;
			if (ret <= 0)
				break;

			/* push out the bytes */
			goto again;
		}

		/* Finally flush the underlying BIO */
		ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
		break;
	case BIO_C_GET_CIPHER_STATUS:
		ret = (long)ctx->ok;
		break;
	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_C_GET_CIPHER_CTX:
		c_ctx = (EVP_CIPHER_CTX **)ptr;
		(*c_ctx) = &(ctx->cipher);
		b->init = 1;
		break;
	case BIO_CTRL_DUP:
		dbio = (BIO *)ptr;
		dctx = (BIO_ENC_CTX *)dbio->ptr;
		EVP_CIPHER_CTX_init(&dctx->cipher);
		ret = EVP_CIPHER_CTX_copy(&dctx->cipher, &ctx->cipher);
		if (ret)
			dbio->init = 1;
		break;
	default:
		ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
		break;
	}
	return (ret);
}

static long
enc_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);
}

/*
void BIO_set_cipher_ctx(b,c)
BIO *b;
EVP_CIPHER_ctx *c;
	{
	if (b == NULL) return;

	if ((b->callback != NULL) &&
		(b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,0L) <= 0))
		return;

	b->init=1;
	ctx=(BIO_ENC_CTX *)b->ptr;
	memcpy(ctx->cipher,c,sizeof(EVP_CIPHER_CTX));

	if (b->callback != NULL)
		b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,1L);
	}
*/

void
BIO_set_cipher(BIO *b, const EVP_CIPHER *c, const unsigned char *k,
    const unsigned char *i, int e)
{
	BIO_ENC_CTX *ctx;

	if (b == NULL)
		return;

	if ((b->callback != NULL) &&
	    (b->callback(b, BIO_CB_CTRL, (const char *)c, BIO_CTRL_SET, e, 0L) <= 0))
		return;

	b->init = 1;
	ctx = (BIO_ENC_CTX *)b->ptr;
	EVP_CipherInit_ex(&(ctx->cipher), c, NULL, k, i, e);

	if (b->callback != NULL)
		b->callback(b, BIO_CB_CTRL, (const char *)c, BIO_CTRL_SET, e, 1L);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: bio_enc.c,v 1.19 2015/09/10 15:56:25 jsing 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/buffer.h>
64			#include <openssl/evp.h>
65
66			static int enc_write(BIO h, const char buf, int num);
67			static int enc_read(BIO h, char buf, int size);
68			/static int enc_puts(BIO h, const char str); /
69			/static int enc_gets(BIO h, char str, int size); /
70			static long enc_ctrl(BIO h, int cmd, long arg1, void arg2);
71			static int enc_new(BIO *h);
72			static int enc_free(BIO *data);
73			static long enc_callback_ctrl(BIO h, int cmd, bio_info_cb fps);
74			#define ENC_BLOCK_SIZE (1024*4)
75			#define BUF_OFFSET (EVP_MAX_BLOCK_LENGTH*2)
76
77			typedef struct enc_struct {
78			int buf_len;
79			int buf_off;
80			int cont; /* <= 0 when finished */
81			int finished;
82			int ok; /* bad decrypt */
83			EVP_CIPHER_CTX cipher;
84			/* buf is larger than ENC_BLOCK_SIZE because EVP_DecryptUpdate
85			* can return up to a block more data than is presented to it
86			*/
87			char buf[ENC_BLOCK_SIZE + BUF_OFFSET + 2];
88			} BIO_ENC_CTX;
89
90			static BIO_METHOD methods_enc = {
91			.type = BIO_TYPE_CIPHER,
92			.name = "cipher",
93			.bwrite = enc_write,
94			.bread = enc_read,
95			.ctrl = enc_ctrl,
96			.create = enc_new,
97			.destroy = enc_free,
98			.callback_ctrl = enc_callback_ctrl
99			};
100
101			BIO_METHOD *
102			BIO_f_cipher(void)
103		2	{
104		2	return (&methods_enc);
105			}
106
107			static int
108			enc_new(BIO *bi)
109		2	{
110			BIO_ENC_CTX *ctx;
111
112		2	ctx = malloc(sizeof(BIO_ENC_CTX));
113	✗✓	2	if (ctx == NULL)
114			return (0);
115		2	EVP_CIPHER_CTX_init(&ctx->cipher);
116
117		2	ctx->buf_len = 0;
118		2	ctx->buf_off = 0;
119		2	ctx->cont = 1;
120		2	ctx->finished = 0;
121		2	ctx->ok = 1;
122
123		2	bi->init = 0;
124		2	bi->ptr = (char *)ctx;
125		2	bi->flags = 0;
126		2	return (1);
127			}
128
129			static int
130			enc_free(BIO *a)
131		2	{
132			BIO_ENC_CTX *b;
133
134	✗✓	2	if (a == NULL)
135			return (0);
136		2	b = (BIO_ENC_CTX *)a->ptr;
137		2	EVP_CIPHER_CTX_cleanup(&(b->cipher));
138		2	explicit_bzero(a->ptr, sizeof(BIO_ENC_CTX));
139		2	free(a->ptr);
140		2	a->ptr = NULL;
141		2	a->init = 0;
142		2	a->flags = 0;
143		2	return (1);
144			}
145
146			static int
147			enc_read(BIO b, char out, int outl)
148		2	{
149		2	int ret = 0, i;
150			BIO_ENC_CTX *ctx;
151
152	✗✓	2	if (out == NULL)
153			return (0);
154		2	ctx = (BIO_ENC_CTX *)b->ptr;
155
156	✓✗✗✓	2	if ((ctx == NULL) \|\| (b->next_bio == NULL))
157			return (0);
158
159			/* First check if there are bytes decoded/encoded */
160	✓✓	2	if (ctx->buf_len > 0) {
161		1	i = ctx->buf_len - ctx->buf_off;
162	✗✓	1	if (i > outl)
163			i = outl;
164		1	memcpy(out, &(ctx->buf[ctx->buf_off]), i);
165		1	ret = i;
166		1	out += i;
167		1	outl -= i;
168		1	ctx->buf_off += i;
169	✓✗	1	if (ctx->buf_len == ctx->buf_off) {
170		1	ctx->buf_len = 0;
171		1	ctx->buf_off = 0;
172			}
173			}
174
175			/* At this point, we have room of outl bytes and an empty
176			* buffer, so we should read in some more. */
177
178	✓✗	4	while (outl > 0) {
179	✓✓	4	if (ctx->cont <= 0)
180		2	break;
181
182			/* read in at IV offset, read the EVP_Cipher
183			* documentation about why */
184		2	i = BIO_read(b->next_bio, &(ctx->buf[BUF_OFFSET]), ENC_BLOCK_SIZE);
185
186	✓✓	2	if (i <= 0) {
187			/* Should be continue next time we are called? */
188	✓✗	1	if (!BIO_should_retry(b->next_bio)) {
189		1	ctx->cont = i;
190		1	i = EVP_CipherFinal_ex(&(ctx->cipher),
191			(unsigned char *)ctx->buf,
192			&(ctx->buf_len));
193		1	ctx->ok = i;
194		1	ctx->buf_off = 0;
195			} else {
196			ret = (ret == 0) ? i : ret;
197			break;
198			}
199			} else {
200		1	EVP_CipherUpdate(&(ctx->cipher),
201			(unsigned char *)ctx->buf, &ctx->buf_len,
202			(unsigned char *)&(ctx->buf[BUF_OFFSET]), i);
203		1	ctx->cont = 1;
204			/* Note: it is possible for EVP_CipherUpdate to
205			* decrypt zero bytes because this is or looks like
206			* the final block: if this happens we should retry
207			* and either read more data or decrypt the final
208			* block
209			*/
210	✗✓	1	if (ctx->buf_len == 0)
211			continue;
212			}
213
214	✓✗	2	if (ctx->buf_len <= outl)
215		2	i = ctx->buf_len;
216			else
217			i = outl;
218	✗✓	2	if (i <= 0)
219			break;
220		2	memcpy(out, ctx->buf, i);
221		2	ret += i;
222		2	ctx->buf_off = i;
223		2	outl -= i;
224		2	out += i;
225			}
226
227		2	BIO_clear_retry_flags(b);
228		2	BIO_copy_next_retry(b);
229	✓✓	2	return ((ret == 0) ? ctx->cont : ret);
230			}
231
232			static int
233			enc_write(BIO b, const char in, int inl)
234		2	{
235		2	int ret = 0, n, i;
236			BIO_ENC_CTX *ctx;
237
238		2	ctx = (BIO_ENC_CTX *)b->ptr;
239		2	ret = inl;
240
241		2	BIO_clear_retry_flags(b);
242		2	n = ctx->buf_len - ctx->buf_off;
243	✓✓	5	while (n > 0) {
244		1	i = BIO_write(b->next_bio, &(ctx->buf[ctx->buf_off]), n);
245	✗✓	1	if (i <= 0) {
246			BIO_copy_next_retry(b);
247			return (i);
248			}
249		1	ctx->buf_off += i;
250		1	n -= i;
251			}
252			/* at this point all pending data has been written */
253
254	✓✓	2	if ((in == NULL) \|\| (inl <= 0))
255		1	return (0);
256
257		1	ctx->buf_off = 0;
258	✓✓	3	while (inl > 0) {
259		1	n = (inl > ENC_BLOCK_SIZE) ? ENC_BLOCK_SIZE : inl;
260		1	EVP_CipherUpdate(&(ctx->cipher),
261			(unsigned char *)ctx->buf, &ctx->buf_len,
262			(unsigned char *)in, n);
263		1	inl -= n;
264		1	in += n;
265
266		1	ctx->buf_off = 0;
267		1	n = ctx->buf_len;
268	✓✓	3	while (n > 0) {
269		1	i = BIO_write(b->next_bio, &(ctx->buf[ctx->buf_off]), n);
270	✗✓	1	if (i <= 0) {
271			BIO_copy_next_retry(b);
272			return (ret == inl) ? i : ret - inl;
273			}
274		1	n -= i;
275		1	ctx->buf_off += i;
276			}
277		1	ctx->buf_len = 0;
278		1	ctx->buf_off = 0;
279			}
280		1	BIO_copy_next_retry(b);
281		1	return (ret);
282			}
283
284			static long
285			enc_ctrl(BIO b, int cmd, long num, void ptr)
286		9	{
287			BIO *dbio;
288			BIO_ENC_CTX ctx, dctx;
289		9	long ret = 1;
290			int i;
291			EVP_CIPHER_CTX **c_ctx;
292
293		9	ctx = (BIO_ENC_CTX *)b->ptr;
294
295	✗✗✗✗ ✓✓✗✓ ✗✓	9	switch (cmd) {
296			case BIO_CTRL_RESET:
297			ctx->ok = 1;
298			ctx->finished = 0;
299			EVP_CipherInit_ex(&(ctx->cipher), NULL, NULL, NULL, NULL,
300			ctx->cipher.encrypt);
301			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
302			break;
303			case BIO_CTRL_EOF: /* More to read */
304			if (ctx->cont <= 0)
305			ret = 1;
306			else
307			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
308			break;
309			case BIO_CTRL_WPENDING:
310			ret = ctx->buf_len - ctx->buf_off;
311			if (ret <= 0)
312			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
313			break;
314			case BIO_CTRL_PENDING: /* More to read in buffer */
315			ret = ctx->buf_len - ctx->buf_off;
316			if (ret <= 0)
317			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
318			break;
319			case BIO_CTRL_FLUSH:
320			/* do a final write */
321			again:
322	✓✓	4	while (ctx->buf_len != ctx->buf_off) {
323		1	i = enc_write(b, NULL, 0);
324	✗✓	1	if (i < 0)
325			return i;
326			}
327
328	✓✓	3	if (!ctx->finished) {
329		1	ctx->finished = 1;
330		1	ctx->buf_off = 0;
331		1	ret = EVP_CipherFinal_ex(&(ctx->cipher),
332			(unsigned char *)ctx->buf,
333			&(ctx->buf_len));
334		1	ctx->ok = (int)ret;
335	✓✗	1	if (ret <= 0)
336			break;
337
338			/* push out the bytes */
339			goto again;
340			}
341
342			/* Finally flush the underlying BIO */
343		2	ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
344		2	break;
345			case BIO_C_GET_CIPHER_STATUS:
346		1	ret = (long)ctx->ok;
347		1	break;
348			case BIO_C_DO_STATE_MACHINE:
349			BIO_clear_retry_flags(b);
350			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
351			BIO_copy_next_retry(b);
352			break;
353			case BIO_C_GET_CIPHER_CTX:
354		2	c_ctx = (EVP_CIPHER_CTX **)ptr;
355		2	(*c_ctx) = &(ctx->cipher);
356		2	b->init = 1;
357		2	break;
358			case BIO_CTRL_DUP:
359			dbio = (BIO *)ptr;
360			dctx = (BIO_ENC_CTX *)dbio->ptr;
361			EVP_CIPHER_CTX_init(&dctx->cipher);
362			ret = EVP_CIPHER_CTX_copy(&dctx->cipher, &ctx->cipher);
363			if (ret)
364			dbio->init = 1;
365			break;
366			default:
367		4	ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
368			break;
369			}
370		9	return (ret);
371			}
372
373			static long
374			enc_callback_ctrl(BIO b, int cmd, bio_info_cb fp)
375			{
376			long ret = 1;
377
378			if (b->next_bio == NULL)
379			return (0);
380			switch (cmd) {
381			default:
382			ret = BIO_callback_ctrl(b->next_bio, cmd, fp);
383			break;
384			}
385			return (ret);
386			}
387
388			/*
389			void BIO_set_cipher_ctx(b,c)
390			BIO *b;
391			EVP_CIPHER_ctx *c;
392			{
393			if (b == NULL) return;
394
395			if ((b->callback != NULL) &&
396			(b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,0L) <= 0))
397			return;
398
399			b->init=1;
400			ctx=(BIO_ENC_CTX *)b->ptr;
401			memcpy(ctx->cipher,c,sizeof(EVP_CIPHER_CTX));
402
403			if (b->callback != NULL)
404			b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,1L);
405			}
406			*/
407
408			void
409			BIO_set_cipher(BIO b, const EVP_CIPHER c, const unsigned char *k,
410			const unsigned char *i, int e)
411			{
412			BIO_ENC_CTX *ctx;
413
414			if (b == NULL)
415			return;
416
417			if ((b->callback != NULL) &&
418			(b->callback(b, BIO_CB_CTRL, (const char *)c, BIO_CTRL_SET, e, 0L) <= 0))
419			return;
420
421			b->init = 1;
422			ctx = (BIO_ENC_CTX *)b->ptr;
423			EVP_CipherInit_ex(&(ctx->cipher), c, NULL, k, i, e);
424
425			if (b->callback != NULL)
426			b->callback(b, BIO_CB_CTRL, (const char *)c, BIO_CTRL_SET, e, 1L);
427			}