Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/evp/bio_enc.c	Lines:	117	169	69.2 %
Date:	2017-11-13	Branches:	40	82	48.8 %


/* $OpenBSD: bio_enc.c,v 1.20 2017/05/02 03:59:44 deraadt 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));
	freezero(a->ptr, sizeof(BIO_ENC_CTX));
	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 1.20 2017/05/02 03:59:44 deraadt 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			{
104		1220	return (&methods_enc);
105			}
106
107			static int
108			enc_new(BIO *bi)
109			{
110			BIO_ENC_CTX *ctx;
111
112		1220	ctx = malloc(sizeof(BIO_ENC_CTX));
113	✗✓	610	if (ctx == NULL)
114			return (0);
115		610	EVP_CIPHER_CTX_init(&ctx->cipher);
116
117		610	ctx->buf_len = 0;
118		610	ctx->buf_off = 0;
119		610	ctx->cont = 1;
120		610	ctx->finished = 0;
121		610	ctx->ok = 1;
122
123		610	bi->init = 0;
124		610	bi->ptr = (char *)ctx;
125		610	bi->flags = 0;
126		610	return (1);
127		610	}
128
129			static int
130			enc_free(BIO *a)
131			{
132			BIO_ENC_CTX *b;
133
134	✗✓	1220	if (a == NULL)
135			return (0);
136		610	b = (BIO_ENC_CTX *)a->ptr;
137		610	EVP_CIPHER_CTX_cleanup(&(b->cipher));
138		610	freezero(a->ptr, sizeof(BIO_ENC_CTX));
139		610	a->ptr = NULL;
140		610	a->init = 0;
141		610	a->flags = 0;
142		610	return (1);
143		610	}
144
145			static int
146			enc_read(BIO b, char out, int outl)
147			{
148			int ret = 0, i;
149			BIO_ENC_CTX *ctx;
150
151	✗✓	12	if (out == NULL)
152			return (0);
153		6	ctx = (BIO_ENC_CTX *)b->ptr;
154
155	✓✗✗✓	12	if ((ctx == NULL) \|\| (b->next_bio == NULL))
156			return (0);
157
158			/* First check if there are bytes decoded/encoded */
159	✓✓	6	if (ctx->buf_len > 0) {
160		3	i = ctx->buf_len - ctx->buf_off;
161	✗✓	3	if (i > outl)
162			i = outl;
163		3	memcpy(out, &(ctx->buf[ctx->buf_off]), i);
164			ret = i;
165		3	out += i;
166		3	outl -= i;
167		3	ctx->buf_off += i;
168	✓✗	3	if (ctx->buf_len == ctx->buf_off) {
169		3	ctx->buf_len = 0;
170		3	ctx->buf_off = 0;
171		3	}
172			}
173
174			/* At this point, we have room of outl bytes and an empty
175			* buffer, so we should read in some more. */
176
177	✓✗	24	while (outl > 0) {
178	✓✓	12	if (ctx->cont <= 0)
179			break;
180
181			/* read in at IV offset, read the EVP_Cipher
182			* documentation about why */
183		6	i = BIO_read(b->next_bio, &(ctx->buf[BUF_OFFSET]), ENC_BLOCK_SIZE);
184
185	✓✓	6	if (i <= 0) {
186			/* Should be continue next time we are called? */
187	✓✗	3	if (!BIO_should_retry(b->next_bio)) {
188		3	ctx->cont = i;
189		6	i = EVP_CipherFinal_ex(&(ctx->cipher),
190		3	(unsigned char *)ctx->buf,
191			&(ctx->buf_len));
192		3	ctx->ok = i;
193		3	ctx->buf_off = 0;
194			} else {
195			ret = (ret == 0) ? i : ret;
196			break;
197			}
198		3	} else {
199		6	EVP_CipherUpdate(&(ctx->cipher),
200		3	(unsigned char *)ctx->buf, &ctx->buf_len,
201			(unsigned char *)&(ctx->buf[BUF_OFFSET]), i);
202		3	ctx->cont = 1;
203			/* Note: it is possible for EVP_CipherUpdate to
204			* decrypt zero bytes because this is or looks like
205			* the final block: if this happens we should retry
206			* and either read more data or decrypt the final
207			* block
208			*/
209	✗✓	3	if (ctx->buf_len == 0)
210			continue;
211			}
212
213	✓✗	6	if (ctx->buf_len <= outl)
214		6	i = ctx->buf_len;
215			else
216			i = outl;
217	✓✗	6	if (i <= 0)
218			break;
219		6	memcpy(out, ctx->buf, i);
220		6	ret += i;
221		6	ctx->buf_off = i;
222		6	outl -= i;
223		6	out += i;
224			}
225
226		6	BIO_clear_retry_flags(b);
227		6	BIO_copy_next_retry(b);
228	✓✓	18	return ((ret == 0) ? ctx->cont : ret);
229		6	}
230
231			static int
232			enc_write(BIO b, const char in, int inl)
233			{
234			int ret = 0, n, i;
235			BIO_ENC_CTX *ctx;
236
237		6564	ctx = (BIO_ENC_CTX *)b->ptr;
238			ret = inl;
239
240		3282	BIO_clear_retry_flags(b);
241		3282	n = ctx->buf_len - ctx->buf_off;
242	✓✓	7210	while (n > 0) {
243		323	i = BIO_write(b->next_bio, &(ctx->buf[ctx->buf_off]), n);
244	✗✓	323	if (i <= 0) {
245			BIO_copy_next_retry(b);
246			return (i);
247			}
248		323	ctx->buf_off += i;
249		323	n -= i;
250			}
251			/* at this point all pending data has been written */
252
253	✓✓	3282	if ((in == NULL) \|\| (inl <= 0))
254		323	return (0);
255
256			ctx->buf_off = 0;
257	✓✓	11836	while (inl > 0) {
258		2959	n = (inl > ENC_BLOCK_SIZE) ? ENC_BLOCK_SIZE : inl;
259		5918	EVP_CipherUpdate(&(ctx->cipher),
260		2959	(unsigned char *)ctx->buf, &ctx->buf_len,
261			(unsigned char *)in, n);
262		2959	inl -= n;
263		2959	in += n;
264
265		2959	ctx->buf_off = 0;
266		2959	n = ctx->buf_len;
267	✓✓	11836	while (n > 0) {
268		2959	i = BIO_write(b->next_bio, &(ctx->buf[ctx->buf_off]), n);
269	✗✓	2959	if (i <= 0) {
270			BIO_copy_next_retry(b);
271			return (ret == inl) ? i : ret - inl;
272			}
273		2959	n -= i;
274		2959	ctx->buf_off += i;
275			}
276		2959	ctx->buf_len = 0;
277			ctx->buf_off = 0;
278			}
279		2959	BIO_copy_next_retry(b);
280		2959	return (ret);
281		3282	}
282
283			static long
284			enc_ctrl(BIO b, int cmd, long num, void ptr)
285			{
286			BIO *dbio;
287			BIO_ENC_CTX ctx, dctx;
288			long ret = 1;
289			int i;
290			EVP_CIPHER_CTX **c_ctx;
291
292		3678	ctx = (BIO_ENC_CTX *)b->ptr;
293
294	✗✗✗✗ ✓✓✗✓ ✗✓	1839	switch (cmd) {
295			case BIO_CTRL_RESET:
296			ctx->ok = 1;
297			ctx->finished = 0;
298			EVP_CipherInit_ex(&(ctx->cipher), NULL, NULL, NULL, NULL,
299			ctx->cipher.encrypt);
300			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
301			break;
302			case BIO_CTRL_EOF: /* More to read */
303			if (ctx->cont <= 0)
304			ret = 1;
305			else
306			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
307			break;
308			case BIO_CTRL_WPENDING:
309			ret = ctx->buf_len - ctx->buf_off;
310			if (ret <= 0)
311			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
312			break;
313			case BIO_CTRL_PENDING: /* More to read in buffer */
314			ret = ctx->buf_len - ctx->buf_off;
315			if (ret <= 0)
316			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
317		610	break;
318			case BIO_CTRL_FLUSH:
319			/* do a final write */
320			again:
321	✓✓	3080	while (ctx->buf_len != ctx->buf_off) {
322		323	i = enc_write(b, NULL, 0);
323	✗✓	323	if (i < 0)
324			return i;
325			}
326
327	✓✓	1217	if (!ctx->finished) {
328		607	ctx->finished = 1;
329		607	ctx->buf_off = 0;
330		1214	ret = EVP_CipherFinal_ex(&(ctx->cipher),
331		607	(unsigned char *)ctx->buf,
332			&(ctx->buf_len));
333		607	ctx->ok = (int)ret;
334	✓✗	607	if (ret <= 0)
335			break;
336
337			/* push out the bytes */
338		607	goto again;
339			}
340
341			/* Finally flush the underlying BIO */
342		610	ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
343		610	break;
344			case BIO_C_GET_CIPHER_STATUS:
345		3	ret = (long)ctx->ok;
346		3	break;
347			case BIO_C_DO_STATE_MACHINE:
348			BIO_clear_retry_flags(b);
349			ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
350			BIO_copy_next_retry(b);
351			break;
352			case BIO_C_GET_CIPHER_CTX:
353		610	c_ctx = (EVP_CIPHER_CTX **)ptr;
354		610	(*c_ctx) = &(ctx->cipher);
355		610	b->init = 1;
356		610	break;
357			case BIO_CTRL_DUP:
358			dbio = (BIO *)ptr;
359			dctx = (BIO_ENC_CTX *)dbio->ptr;
360			EVP_CIPHER_CTX_init(&dctx->cipher);
361			ret = EVP_CIPHER_CTX_copy(&dctx->cipher, &ctx->cipher);
362			if (ret)
363			dbio->init = 1;
364			break;
365			default:
366		616	ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
367		616	break;
368			}
369		1839	return (ret);
370		1839	}
371
372			static long
373			enc_callback_ctrl(BIO b, int cmd, bio_info_cb fp)
374			{
375			long ret = 1;
376
377			if (b->next_bio == NULL)
378			return (0);
379			switch (cmd) {
380			default:
381			ret = BIO_callback_ctrl(b->next_bio, cmd, fp);
382			break;
383			}
384			return (ret);
385			}
386
387			/*
388			void BIO_set_cipher_ctx(b,c)
389			BIO *b;
390			EVP_CIPHER_ctx *c;
391			{
392			if (b == NULL) return;
393
394			if ((b->callback != NULL) &&
395			(b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,0L) <= 0))
396			return;
397
398			b->init=1;
399			ctx=(BIO_ENC_CTX *)b->ptr;
400			memcpy(ctx->cipher,c,sizeof(EVP_CIPHER_CTX));
401
402			if (b->callback != NULL)
403			b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,1L);
404			}
405			*/
406
407			void
408			BIO_set_cipher(BIO b, const EVP_CIPHER c, const unsigned char *k,
409			const unsigned char *i, int e)
410			{
411			BIO_ENC_CTX *ctx;
412
413			if (b == NULL)
414			return;
415
416			if ((b->callback != NULL) &&
417			(b->callback(b, BIO_CB_CTRL, (const char *)c, BIO_CTRL_SET, e, 0L) <= 0))
418			return;
419
420			b->init = 1;
421			ctx = (BIO_ENC_CTX *)b->ptr;
422			EVP_CipherInit_ex(&(ctx->cipher), c, NULL, k, i, e);
423
424			if (b->callback != NULL)
425			b->callback(b, BIO_CB_CTRL, (const char *)c, BIO_CTRL_SET, e, 1L);
426			}