Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/evp/evp_enc.c	Lines:	199	310	64.2 %
Date:	2017-11-13	Branches:	116	205	56.6 %


/* $OpenBSD: evp_enc.c,v 1.36 2017/01/29 17:49:23 beck 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 <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <sys/types.h>

#include <openssl/opensslconf.h>

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

#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif

#include "evp_locl.h"

#define M_do_cipher(ctx, out, in, inl) ctx->cipher->do_cipher(ctx, out, in, inl)

void
EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *ctx)
{
	memset(ctx, 0, sizeof(EVP_CIPHER_CTX));
}

EVP_CIPHER_CTX *
EVP_CIPHER_CTX_new(void)
{
	return calloc(1, sizeof(EVP_CIPHER_CTX));
}

int
EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
    const unsigned char *key, const unsigned char *iv, int enc)
{
	if (cipher)
		EVP_CIPHER_CTX_init(ctx);
	return EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, enc);
}

int
EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ENGINE *impl,
    const unsigned char *key, const unsigned char *iv, int enc)
{
	if (enc == -1)
		enc = ctx->encrypt;
	else {
		if (enc)
			enc = 1;
		ctx->encrypt = enc;
	}
#ifndef OPENSSL_NO_ENGINE
	/* Whether it's nice or not, "Inits" can be used on "Final"'d contexts
	 * so this context may already have an ENGINE! Try to avoid releasing
	 * the previous handle, re-querying for an ENGINE, and having a
	 * reinitialisation, when it may all be unecessary. */
	if (ctx->engine && ctx->cipher &&
	    (!cipher || (cipher && (cipher->nid == ctx->cipher->nid))))
		goto skip_to_init;
#endif
	if (cipher) {
		/* Ensure a context left lying around from last time is cleared
		 * (the previous check attempted to avoid this if the same
		 * ENGINE and EVP_CIPHER could be used). */
		if (ctx->cipher) {
			unsigned long flags = ctx->flags;
			EVP_CIPHER_CTX_cleanup(ctx);
			/* Restore encrypt and flags */
			ctx->encrypt = enc;
			ctx->flags = flags;
		}
#ifndef OPENSSL_NO_ENGINE
		if (impl) {
			if (!ENGINE_init(impl)) {
				EVPerror(EVP_R_INITIALIZATION_ERROR);
				return 0;
			}
		} else
			/* Ask if an ENGINE is reserved for this job */
			impl = ENGINE_get_cipher_engine(cipher->nid);
		if (impl) {
			/* There's an ENGINE for this job ... (apparently) */
			const EVP_CIPHER *c =
			    ENGINE_get_cipher(impl, cipher->nid);
			if (!c) {
				EVPerror(EVP_R_INITIALIZATION_ERROR);
				return 0;
			}
			/* We'll use the ENGINE's private cipher definition */
			cipher = c;
			/* Store the ENGINE functional reference so we know
			 * 'cipher' came from an ENGINE and we need to release
			 * it when done. */
			ctx->engine = impl;
		} else
			ctx->engine = NULL;
#endif

		ctx->cipher = cipher;
		if (ctx->cipher->ctx_size) {
			ctx->cipher_data = malloc(ctx->cipher->ctx_size);
			if (!ctx->cipher_data) {
				EVPerror(ERR_R_MALLOC_FAILURE);
				return 0;
			}
		} else {
			ctx->cipher_data = NULL;
		}
		ctx->key_len = cipher->key_len;
		ctx->flags = 0;
		if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) {
			if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) {
				EVPerror(EVP_R_INITIALIZATION_ERROR);
				return 0;
			}
		}
	} else if (!ctx->cipher) {
		EVPerror(EVP_R_NO_CIPHER_SET);
		return 0;
	}
#ifndef OPENSSL_NO_ENGINE
skip_to_init:
#endif
	/* we assume block size is a power of 2 in *cryptUpdate */
	if (ctx->cipher->block_size != 1 &&
	    ctx->cipher->block_size != 8 &&
	    ctx->cipher->block_size != 16) {
		EVPerror(EVP_R_BAD_BLOCK_LENGTH);
		return 0;
	}

	if (!(EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_CUSTOM_IV)) {
		switch (EVP_CIPHER_CTX_mode(ctx)) {

		case EVP_CIPH_STREAM_CIPHER:
		case EVP_CIPH_ECB_MODE:
			break;

		case EVP_CIPH_CFB_MODE:
		case EVP_CIPH_OFB_MODE:

			ctx->num = 0;
			/* fall-through */

		case EVP_CIPH_CBC_MODE:

			if ((size_t)EVP_CIPHER_CTX_iv_length(ctx) >
			    sizeof(ctx->iv)) {
				EVPerror(EVP_R_IV_TOO_LARGE);
				return 0;
			}
			if (iv)
				memcpy(ctx->oiv, iv,
				    EVP_CIPHER_CTX_iv_length(ctx));
			memcpy(ctx->iv, ctx->oiv,
			    EVP_CIPHER_CTX_iv_length(ctx));
			break;

		case EVP_CIPH_CTR_MODE:
			ctx->num = 0;
			/* Don't reuse IV for CTR mode */
			if (iv)
				memcpy(ctx->iv, iv,
				    EVP_CIPHER_CTX_iv_length(ctx));
			break;

		default:
			return 0;
			break;
		}
	}

	if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
		if (!ctx->cipher->init(ctx, key, iv, enc))
			return 0;
	}
	ctx->buf_len = 0;
	ctx->final_used = 0;
	ctx->block_mask = ctx->cipher->block_size - 1;
	return 1;
}

int
EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
    const unsigned char *in, int inl)
{
	if (ctx->encrypt)
		return EVP_EncryptUpdate(ctx, out, outl, in, inl);
	else
		return EVP_DecryptUpdate(ctx, out, outl, in, inl);
}

int
EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
	if (ctx->encrypt)
		return EVP_EncryptFinal_ex(ctx, out, outl);
	else
		return EVP_DecryptFinal_ex(ctx, out, outl);
}

__warn_references(EVP_CipherFinal,
    "warning: EVP_CipherFinal is often misused, please use EVP_CipherFinal_ex and EVP_CIPHER_CTX_cleanup");

int
EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
	int ret;
	if (ctx->encrypt)
		ret = EVP_EncryptFinal_ex(ctx, out, outl);
	else
		ret = EVP_DecryptFinal_ex(ctx, out, outl);
	return ret;
}

int
EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
    const unsigned char *key, const unsigned char *iv)
{
	return EVP_CipherInit(ctx, cipher, key, iv, 1);
}

int
EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ENGINE *impl,
    const unsigned char *key, const unsigned char *iv)
{
	return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
}

int
EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
    const unsigned char *key, const unsigned char *iv)
{
	return EVP_CipherInit(ctx, cipher, key, iv, 0);
}

int
EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ENGINE *impl,
    const unsigned char *key, const unsigned char *iv)
{
	return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
}

int
EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
    const unsigned char *in, int inl)
{
	int i, j, bl;

	if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
		i = M_do_cipher(ctx, out, in, inl);
		if (i < 0)
			return 0;
		else
			*outl = i;
		return 1;
	}

	if (inl <= 0) {
		*outl = 0;
		return inl == 0;
	}

	if (ctx->buf_len == 0 && (inl&(ctx->block_mask)) == 0) {
		if (M_do_cipher(ctx, out, in, inl)) {
			*outl = inl;
			return 1;
		} else {
			*outl = 0;
			return 0;
		}
	}
	i = ctx->buf_len;
	bl = ctx->cipher->block_size;
	if ((size_t)bl > sizeof(ctx->buf)) {
		EVPerror(EVP_R_BAD_BLOCK_LENGTH);
		*outl = 0;
		return 0;
	}
	if (i != 0) {
		if (bl - i > inl) {
			memcpy(&(ctx->buf[i]), in, inl);
			ctx->buf_len += inl;
			*outl = 0;
			return 1;
		} else {
			j = bl - i;
			memcpy(&(ctx->buf[i]), in, j);
			if (!M_do_cipher(ctx, out, ctx->buf, bl))
				return 0;
			inl -= j;
			in += j;
			out += bl;
			*outl = bl;
		}
	} else
		*outl = 0;
	i = inl&(bl - 1);
	inl -= i;
	if (inl > 0) {
		if (!M_do_cipher(ctx, out, in, inl))
			return 0;
		*outl += inl;
	}

	if (i != 0)
		memcpy(ctx->buf, &(in[inl]), i);
	ctx->buf_len = i;
	return 1;
}

__warn_references(EVP_EncryptFinal,
    "warning: EVP_EncryptFinal is often misused, please use EVP_EncryptFinal_ex and EVP_CIPHER_CTX_cleanup");

int
EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
	int ret;

	ret = EVP_EncryptFinal_ex(ctx, out, outl);
	return ret;
}

int
EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
	int n, ret;
	unsigned int i, b, bl;

	if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
		ret = M_do_cipher(ctx, out, NULL, 0);
		if (ret < 0)
			return 0;
		else
			*outl = ret;
		return 1;
	}

	b = ctx->cipher->block_size;
	if (b > sizeof ctx->buf) {
		EVPerror(EVP_R_BAD_BLOCK_LENGTH);
		return 0;
	}
	if (b == 1) {
		*outl = 0;
		return 1;
	}
	bl = ctx->buf_len;
	if (ctx->flags & EVP_CIPH_NO_PADDING) {
		if (bl) {
			EVPerror(EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
			return 0;
		}
		*outl = 0;
		return 1;
	}

	n = b - bl;
	for (i = bl; i < b; i++)
		ctx->buf[i] = n;
	ret = M_do_cipher(ctx, out, ctx->buf, b);


	if (ret)
		*outl = b;

	return ret;
}

int
EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
    const unsigned char *in, int inl)
{
	int fix_len;
	unsigned int b;

	if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
		fix_len = M_do_cipher(ctx, out, in, inl);
		if (fix_len < 0) {
			*outl = 0;
			return 0;
		} else
			*outl = fix_len;
		return 1;
	}

	if (inl <= 0) {
		*outl = 0;
		return inl == 0;
	}

	if (ctx->flags & EVP_CIPH_NO_PADDING)
		return EVP_EncryptUpdate(ctx, out, outl, in, inl);

	b = ctx->cipher->block_size;
	if (b > sizeof ctx->final) {
		EVPerror(EVP_R_BAD_BLOCK_LENGTH);
		return 0;
	}

	if (ctx->final_used) {
		memcpy(out, ctx->final, b);
		out += b;
		fix_len = 1;
	} else
		fix_len = 0;


	if (!EVP_EncryptUpdate(ctx, out, outl, in, inl))
		return 0;

	/* if we have 'decrypted' a multiple of block size, make sure
	 * we have a copy of this last block */
	if (b > 1 && !ctx->buf_len) {
		*outl -= b;
		ctx->final_used = 1;
		memcpy(ctx->final, &out[*outl], b);
	} else
		ctx->final_used = 0;

	if (fix_len)
		*outl += b;

	return 1;
}

__warn_references(EVP_DecryptFinal,
    "warning: EVP_DecryptFinal is often misused, please use EVP_DecryptFinal_ex and EVP_CIPHER_CTX_cleanup");

int
EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
	int ret;

	ret = EVP_DecryptFinal_ex(ctx, out, outl);
	return ret;
}

int
EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
	int i, n;
	unsigned int b;
	*outl = 0;

	if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
		i = M_do_cipher(ctx, out, NULL, 0);
		if (i < 0)
			return 0;
		else
			*outl = i;
		return 1;
	}

	b = ctx->cipher->block_size;
	if (ctx->flags & EVP_CIPH_NO_PADDING) {
		if (ctx->buf_len) {
			EVPerror(EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
			return 0;
		}
		*outl = 0;
		return 1;
	}
	if (b > 1) {
		if (ctx->buf_len || !ctx->final_used) {
			EVPerror(EVP_R_WRONG_FINAL_BLOCK_LENGTH);
			return (0);
		}
		if (b > sizeof ctx->final) {
			EVPerror(EVP_R_BAD_BLOCK_LENGTH);
			return 0;
		}
		n = ctx->final[b - 1];
		if (n == 0 || n > (int)b) {
			EVPerror(EVP_R_BAD_DECRYPT);
			return (0);
		}
		for (i = 0; i < n; i++) {
			if (ctx->final[--b] != n) {
				EVPerror(EVP_R_BAD_DECRYPT);
				return (0);
			}
		}
		n = ctx->cipher->block_size - n;
		for (i = 0; i < n; i++)
			out[i] = ctx->final[i];
		*outl = n;
	} else
		*outl = 0;
	return (1);
}

void
EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
{
	if (ctx) {
		EVP_CIPHER_CTX_cleanup(ctx);
		free(ctx);
	}
}

int
EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *c)
{
	if (c->cipher != NULL) {
		if (c->cipher->cleanup && !c->cipher->cleanup(c))
			return 0;
		/* Cleanse cipher context data */
		if (c->cipher_data)
			explicit_bzero(c->cipher_data, c->cipher->ctx_size);
	}
	free(c->cipher_data);
#ifndef OPENSSL_NO_ENGINE
	if (c->engine)
		/* The EVP_CIPHER we used belongs to an ENGINE, release the
		 * functional reference we held for this reason. */
		ENGINE_finish(c->engine);
#endif
	explicit_bzero(c, sizeof(EVP_CIPHER_CTX));
	return 1;
}

int
EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
{
	if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
		return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH,
		    keylen, NULL);
	if (c->key_len == keylen)
		return 1;
	if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) {
		c->key_len = keylen;
		return 1;
	}
	EVPerror(EVP_R_INVALID_KEY_LENGTH);
	return 0;
}

int
EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
{
	if (pad)
		ctx->flags &= ~EVP_CIPH_NO_PADDING;
	else
		ctx->flags |= EVP_CIPH_NO_PADDING;
	return 1;
}

int
EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
{
	int ret;

	if (!ctx->cipher) {
		EVPerror(EVP_R_NO_CIPHER_SET);
		return 0;
	}

	if (!ctx->cipher->ctrl) {
		EVPerror(EVP_R_CTRL_NOT_IMPLEMENTED);
		return 0;
	}

	ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
	if (ret == -1) {
		EVPerror(EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
		return 0;
	}
	return ret;
}

int
EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key)
{
	if (ctx->cipher->flags & EVP_CIPH_RAND_KEY)
		return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key);
	arc4random_buf(key, ctx->key_len);
	return 1;
}

int
EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
{
	if ((in == NULL) || (in->cipher == NULL)) {
		EVPerror(EVP_R_INPUT_NOT_INITIALIZED);
		return 0;
	}
#ifndef OPENSSL_NO_ENGINE
	/* Make sure it's safe to copy a cipher context using an ENGINE */
	if (in->engine && !ENGINE_init(in->engine)) {
		EVPerror(ERR_R_ENGINE_LIB);
		return 0;
	}
#endif

	EVP_CIPHER_CTX_cleanup(out);
	memcpy(out, in, sizeof *out);

	if (in->cipher_data && in->cipher->ctx_size) {
		out->cipher_data = malloc(in->cipher->ctx_size);
		if (!out->cipher_data) {
			EVPerror(ERR_R_MALLOC_FAILURE);
			return 0;
		}
		memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size);
	}

	if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
		return in->cipher->ctrl((EVP_CIPHER_CTX *)in,
		    EVP_CTRL_COPY, 0, out);
	return 1;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: evp_enc.c,v 1.36 2017/01/29 17:49:23 beck 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 <stdio.h>
60			#include <stdlib.h>
61			#include <string.h>
62
63			#include <sys/types.h>
64
65			#include <openssl/opensslconf.h>
66
67			#include <openssl/err.h>
68			#include <openssl/evp.h>
69
70			#ifndef OPENSSL_NO_ENGINE
71			#include <openssl/engine.h>
72			#endif
73
74			#include "evp_locl.h"
75
76			#define M_do_cipher(ctx, out, in, inl) ctx->cipher->do_cipher(ctx, out, in, inl)
77
78			void
79			EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *ctx)
80			{
81		3122	memset(ctx, 0, sizeof(EVP_CIPHER_CTX));
82		1561	}
83
84			EVP_CIPHER_CTX *
85			EVP_CIPHER_CTX_new(void)
86			{
87		984	return calloc(1, sizeof(EVP_CIPHER_CTX));
88			}
89
90			int
91			EVP_CipherInit(EVP_CIPHER_CTX ctx, const EVP_CIPHER cipher,
92			const unsigned char key, const unsigned char iv, int enc)
93			{
94			if (cipher)
95			EVP_CIPHER_CTX_init(ctx);
96			return EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, enc);
97			}
98
99			int
100			EVP_CipherInit_ex(EVP_CIPHER_CTX ctx, const EVP_CIPHER cipher, ENGINE *impl,
101			const unsigned char key, const unsigned char iv, int enc)
102			{
103	✗✓	5814	if (enc == -1)
104			enc = ctx->encrypt;
105			else {
106	✓✓	2907	if (enc)
107		1625	enc = 1;
108		2907	ctx->encrypt = enc;
109			}
110			#ifndef OPENSSL_NO_ENGINE
111			/* Whether it's nice or not, "Inits" can be used on "Final"'d contexts
112			* so this context may already have an ENGINE! Try to avoid releasing
113			* the previous handle, re-querying for an ENGINE, and having a
114			* reinitialisation, when it may all be unecessary. */
115	✗✓✗✗ ✗✗	2907	if (ctx->engine && ctx->cipher &&
116			(!cipher \|\| (cipher && (cipher->nid == ctx->cipher->nid))))
117			goto skip_to_init;
118			#endif
119	✓✓	2907	if (cipher) {
120			/* Ensure a context left lying around from last time is cleared
121			* (the previous check attempted to avoid this if the same
122			* ENGINE and EVP_CIPHER could be used). */
123	✓✓	2173	if (ctx->cipher) {
124		198	unsigned long flags = ctx->flags;
125		198	EVP_CIPHER_CTX_cleanup(ctx);
126			/* Restore encrypt and flags */
127		198	ctx->encrypt = enc;
128		198	ctx->flags = flags;
129		198	}
130			#ifndef OPENSSL_NO_ENGINE
131	✗✓	2173	if (impl) {
132			if (!ENGINE_init(impl)) {
133			EVPerror(EVP_R_INITIALIZATION_ERROR);
134			return 0;
135			}
136			} else
137			/* Ask if an ENGINE is reserved for this job */
138		2173	impl = ENGINE_get_cipher_engine(cipher->nid);
139	✗✓	2173	if (impl) {
140			/* There's an ENGINE for this job ... (apparently) */
141			const EVP_CIPHER *c =
142			ENGINE_get_cipher(impl, cipher->nid);
143			if (!c) {
144			EVPerror(EVP_R_INITIALIZATION_ERROR);
145			return 0;
146			}
147			/* We'll use the ENGINE's private cipher definition */
148			cipher = c;
149			/* Store the ENGINE functional reference so we know
150			* 'cipher' came from an ENGINE and we need to release
151			* it when done. */
152			ctx->engine = impl;
153			} else
154		2173	ctx->engine = NULL;
155			#endif
156
157		2173	ctx->cipher = cipher;
158	✓✓	2173	if (ctx->cipher->ctx_size) {
159		2137	ctx->cipher_data = malloc(ctx->cipher->ctx_size);
160	✗✓	2137	if (!ctx->cipher_data) {
161			EVPerror(ERR_R_MALLOC_FAILURE);
162			return 0;
163			}
164			} else {
165		36	ctx->cipher_data = NULL;
166			}
167		2173	ctx->key_len = cipher->key_len;
168		2173	ctx->flags = 0;
169	✓✓	2173	if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) {
170	✗✓	112	if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) {
171			EVPerror(EVP_R_INITIALIZATION_ERROR);
172			return 0;
173			}
174			}
175	✗✓	734	} else if (!ctx->cipher) {
176			EVPerror(EVP_R_NO_CIPHER_SET);
177			return 0;
178			}
179			#ifndef OPENSSL_NO_ENGINE
180			skip_to_init:
181			#endif
182			/* we assume block size is a power of 2 in cryptUpdate /
183	✓✓✗✓	4261	if (ctx->cipher->block_size != 1 &&
184	✓✓	1904	ctx->cipher->block_size != 8 &&
185		1354	ctx->cipher->block_size != 16) {
186			EVPerror(EVP_R_BAD_BLOCK_LENGTH);
187			return 0;
188			}
189
190	✓✗	2907	if (!(EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_CUSTOM_IV)) {
191	✗✓✓✓ ✗✗✓	6004	switch (EVP_CIPHER_CTX_mode(ctx)) {
192
193			case EVP_CIPH_STREAM_CIPHER:
194			case EVP_CIPH_ECB_MODE:
195			break;
196
197			case EVP_CIPH_CFB_MODE:
198			case EVP_CIPH_OFB_MODE:
199
200		824	ctx->num = 0;
201			/* fall-through */
202
203			case EVP_CIPH_CBC_MODE:
204
205	✗✓	2246	if ((size_t)EVP_CIPHER_CTX_iv_length(ctx) >
206			sizeof(ctx->iv)) {
207			EVPerror(EVP_R_IV_TOO_LARGE);
208			return 0;
209			}
210	✓✓	2246	if (iv)
211		3334	memcpy(ctx->oiv, iv,
212		1667	EVP_CIPHER_CTX_iv_length(ctx));
213		4492	memcpy(ctx->iv, ctx->oiv,
214		2246	EVP_CIPHER_CTX_iv_length(ctx));
215		2246	break;
216
217			case EVP_CIPH_CTR_MODE:
218		27	ctx->num = 0;
219			/* Don't reuse IV for CTR mode */
220	✓✗	27	if (iv)
221		54	memcpy(ctx->iv, iv,
222		27	EVP_CIPHER_CTX_iv_length(ctx));
223			break;
224
225			default:
226			return 0;
227			break;
228			}
229			}
230
231	✓✓✗✓	3657	if (key \|\| (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
232	✗✓	2157	if (!ctx->cipher->init(ctx, key, iv, enc))
233			return 0;
234			}
235		2907	ctx->buf_len = 0;
236		2907	ctx->final_used = 0;
237		2907	ctx->block_mask = ctx->cipher->block_size - 1;
238		2907	return 1;
239		2907	}
240
241			int
242			EVP_CipherUpdate(EVP_CIPHER_CTX ctx, unsigned char out, int *outl,
243			const unsigned char *in, int inl)
244			{
245	✓✓	6024	if (ctx->encrypt)
246		1695	return EVP_EncryptUpdate(ctx, out, outl, in, inl);
247			else
248		1317	return EVP_DecryptUpdate(ctx, out, outl, in, inl);
249		3012	}
250
251			int
252			EVP_CipherFinal_ex(EVP_CIPHER_CTX ctx, unsigned char out, int *outl)
253			{
254	✓✓	1320	if (ctx->encrypt)
255		323	return EVP_EncryptFinal_ex(ctx, out, outl);
256			else
257		337	return EVP_DecryptFinal_ex(ctx, out, outl);
258		660	}
259
260			__warn_references(EVP_CipherFinal,
261			"warning: EVP_CipherFinal is often misused, please use EVP_CipherFinal_ex and EVP_CIPHER_CTX_cleanup");
262
263			int
264			EVP_CipherFinal(EVP_CIPHER_CTX ctx, unsigned char out, int *outl)
265			{
266			int ret;
267			if (ctx->encrypt)
268			ret = EVP_EncryptFinal_ex(ctx, out, outl);
269			else
270			ret = EVP_DecryptFinal_ex(ctx, out, outl);
271			return ret;
272			}
273
274			int
275			EVP_EncryptInit(EVP_CIPHER_CTX ctx, const EVP_CIPHER cipher,
276			const unsigned char key, const unsigned char iv)
277			{
278			return EVP_CipherInit(ctx, cipher, key, iv, 1);
279			}
280
281			int
282			EVP_EncryptInit_ex(EVP_CIPHER_CTX ctx, const EVP_CIPHER cipher, ENGINE *impl,
283			const unsigned char key, const unsigned char iv)
284			{
285		1470	return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
286			}
287
288			int
289			EVP_DecryptInit(EVP_CIPHER_CTX ctx, const EVP_CIPHER cipher,
290			const unsigned char key, const unsigned char iv)
291			{
292			return EVP_CipherInit(ctx, cipher, key, iv, 0);
293			}
294
295			int
296			EVP_DecryptInit_ex(EVP_CIPHER_CTX ctx, const EVP_CIPHER cipher, ENGINE *impl,
297			const unsigned char key, const unsigned char iv)
298			{
299		696	return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
300			}
301
302			int
303			EVP_EncryptUpdate(EVP_CIPHER_CTX ctx, unsigned char out, int *outl,
304			const unsigned char *in, int inl)
305			{
306			int i, j, bl;
307
308	✗✓	7982	if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
309			i = M_do_cipher(ctx, out, in, inl);
310			if (i < 0)
311			return 0;
312			else
313			*outl = i;
314			return 1;
315			}
316
317	✗✓	3991	if (inl <= 0) {
318			*outl = 0;
319			return inl == 0;
320			}
321
322	✓✓✓✓	6926	if (ctx->buf_len == 0 && (inl&(ctx->block_mask)) == 0) {
323	✓✗	2488	if (M_do_cipher(ctx, out, in, inl)) {
324		2488	*outl = inl;
325		2488	return 1;
326			} else {
327			*outl = 0;
328			return 0;
329			}
330			}
331		1503	i = ctx->buf_len;
332		1503	bl = ctx->cipher->block_size;
333	✗✓	1503	if ((size_t)bl > sizeof(ctx->buf)) {
334			EVPerror(EVP_R_BAD_BLOCK_LENGTH);
335			*outl = 0;
336			return 0;
337			}
338	✓✓	1503	if (i != 0) {
339	✗✓	1056	if (bl - i > inl) {
340			memcpy(&(ctx->buf[i]), in, inl);
341			ctx->buf_len += inl;
342			*outl = 0;
343			return 1;
344			} else {
345			j = bl - i;
346		1056	memcpy(&(ctx->buf[i]), in, j);
347	✗✓	1056	if (!M_do_cipher(ctx, out, ctx->buf, bl))
348			return 0;
349		1056	inl -= j;
350		1056	in += j;
351		1056	out += bl;
352		1056	*outl = bl;
353			}
354		1056	} else
355		447	*outl = 0;
356		1503	i = inl&(bl - 1);
357		1503	inl -= i;
358	✓✗	1503	if (inl > 0) {
359	✗✓	1503	if (!M_do_cipher(ctx, out, in, inl))
360			return 0;
361		1503	*outl += inl;
362		1503	}
363
364	✓✓	1503	if (i != 0)
365		1415	memcpy(ctx->buf, &(in[inl]), i);
366		1503	ctx->buf_len = i;
367		1503	return 1;
368		3991	}
369
370			__warn_references(EVP_EncryptFinal,
371			"warning: EVP_EncryptFinal is often misused, please use EVP_EncryptFinal_ex and EVP_CIPHER_CTX_cleanup");
372
373			int
374			EVP_EncryptFinal(EVP_CIPHER_CTX ctx, unsigned char out, int *outl)
375			{
376			int ret;
377
378			ret = EVP_EncryptFinal_ex(ctx, out, outl);
379			return ret;
380			}
381
382			int
383			EVP_EncryptFinal_ex(EVP_CIPHER_CTX ctx, unsigned char out, int *outl)
384			{
385			int n, ret;
386			unsigned int i, b, bl;
387
388	✗✓	1884	if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
389			ret = M_do_cipher(ctx, out, NULL, 0);
390			if (ret < 0)
391			return 0;
392			else
393			*outl = ret;
394			return 1;
395			}
396
397		942	b = ctx->cipher->block_size;
398	✗✓	942	if (b > sizeof ctx->buf) {
399			EVPerror(EVP_R_BAD_BLOCK_LENGTH);
400			return 0;
401			}
402	✓✓	942	if (b == 1) {
403		379	*outl = 0;
404		379	return 1;
405			}
406		563	bl = ctx->buf_len;
407	✓✓	563	if (ctx->flags & EVP_CIPH_NO_PADDING) {
408	✗✓	198	if (bl) {
409			EVPerror(EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
410			return 0;
411			}
412		198	*outl = 0;
413		198	return 1;
414			}
415
416		365	n = b - bl;
417	✓✓	5874	for (i = bl; i < b; i++)
418		2572	ctx->buf[i] = n;
419		365	ret = M_do_cipher(ctx, out, ctx->buf, b);
420
421
422	✓✗	365	if (ret)
423		365	*outl = b;
424
425		365	return ret;
426		942	}
427
428			int
429			EVP_DecryptUpdate(EVP_CIPHER_CTX ctx, unsigned char out, int *outl,
430			const unsigned char *in, int inl)
431			{
432			int fix_len;
433			unsigned int b;
434
435	✗✓	3330	if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
436			fix_len = M_do_cipher(ctx, out, in, inl);
437			if (fix_len < 0) {
438			*outl = 0;
439			return 0;
440			} else
441			*outl = fix_len;
442			return 1;
443			}
444
445	✗✓	1665	if (inl <= 0) {
446			*outl = 0;
447			return inl == 0;
448			}
449
450	✓✓	1665	if (ctx->flags & EVP_CIPH_NO_PADDING)
451		342	return EVP_EncryptUpdate(ctx, out, outl, in, inl);
452
453		1323	b = ctx->cipher->block_size;
454	✗✓	1323	if (b > sizeof ctx->final) {
455			EVPerror(EVP_R_BAD_BLOCK_LENGTH);
456			return 0;
457			}
458
459	✗✓	1323	if (ctx->final_used) {
460			memcpy(out, ctx->final, b);
461			out += b;
462			fix_len = 1;
463			} else
464			fix_len = 0;
465
466
467	✗✓	1323	if (!EVP_EncryptUpdate(ctx, out, outl, in, inl))
468			return 0;
469
470			/* if we have 'decrypted' a multiple of block size, make sure
471			* we have a copy of this last block */
472	✓✓✓✓	1964	if (b > 1 && !ctx->buf_len) {
473		201	*outl -= b;
474		201	ctx->final_used = 1;
475		201	memcpy(ctx->final, &out[*outl], b);
476		201	} else
477		1122	ctx->final_used = 0;
478
479	✗✓	1323	if (fix_len)
480			*outl += b;
481
482		1323	return 1;
483		1665	}
484
485			__warn_references(EVP_DecryptFinal,
486			"warning: EVP_DecryptFinal is often misused, please use EVP_DecryptFinal_ex and EVP_CIPHER_CTX_cleanup");
487
488			int
489			EVP_DecryptFinal(EVP_CIPHER_CTX ctx, unsigned char out, int *outl)
490			{
491			int ret;
492
493			ret = EVP_DecryptFinal_ex(ctx, out, outl);
494			return ret;
495			}
496
497			int
498			EVP_DecryptFinal_ex(EVP_CIPHER_CTX ctx, unsigned char out, int *outl)
499			{
500			int i, n;
501			unsigned int b;
502		1370	*outl = 0;
503
504	✗✓	685	if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
505			i = M_do_cipher(ctx, out, NULL, 0);
506			if (i < 0)
507			return 0;
508			else
509			*outl = i;
510			return 1;
511			}
512
513		685	b = ctx->cipher->block_size;
514	✓✓	685	if (ctx->flags & EVP_CIPH_NO_PADDING) {
515	✗✓	342	if (ctx->buf_len) {
516			EVPerror(EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
517			return 0;
518			}
519		342	*outl = 0;
520		342	return 1;
521			}
522	✓✓	343	if (b > 1) {
523	✓✗✗✓	402	if (ctx->buf_len \|\| !ctx->final_used) {
524			EVPerror(EVP_R_WRONG_FINAL_BLOCK_LENGTH);
525			return (0);
526			}
527	✗✓	201	if (b > sizeof ctx->final) {
528			EVPerror(EVP_R_BAD_BLOCK_LENGTH);
529			return 0;
530			}
531		201	n = ctx->final[b - 1];
532	✓✗✗✓	402	if (n == 0 \|\| n > (int)b) {
533			EVPerror(EVP_R_BAD_DECRYPT);
534			return (0);
535			}
536	✓✓	2862	for (i = 0; i < n; i++) {
537	✗✓	1230	if (ctx->final[--b] != n) {
538			EVPerror(EVP_R_BAD_DECRYPT);
539			return (0);
540			}
541			}
542		201	n = ctx->cipher->block_size - n;
543	✓✓	2550	for (i = 0; i < n; i++)
544		1074	out[i] = ctx->final[i];
545		201	*outl = n;
546		201	} else
547		142	*outl = 0;
548		343	return (1);
549		685	}
550
551			void
552			EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
553			{
554	✓✓	143372	if (ctx) {
555		492	EVP_CIPHER_CTX_cleanup(ctx);
556		492	free(ctx);
557		492	}
558		71686	}
559
560			int
561			EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *c)
562			{
563	✓✓	4658	if (c->cipher != NULL) {
564	✗✓✗✗	2251	if (c->cipher->cleanup && !c->cipher->cleanup(c))
565			return 0;
566			/* Cleanse cipher context data */
567	✓✓	2251	if (c->cipher_data)
568		2215	explicit_bzero(c->cipher_data, c->cipher->ctx_size);
569			}
570		2329	free(c->cipher_data);
571			#ifndef OPENSSL_NO_ENGINE
572	✗✓	2329	if (c->engine)
573			/* The EVP_CIPHER we used belongs to an ENGINE, release the
574			* functional reference we held for this reason. */
575			ENGINE_finish(c->engine);
576			#endif
577		2329	explicit_bzero(c, sizeof(EVP_CIPHER_CTX));
578		2329	return 1;
579		2329	}
580
581			int
582			EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
583			{
584	✗✓	52	if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
585			return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH,
586			keylen, NULL);
587	✓✗	26	if (c->key_len == keylen)
588		26	return 1;
589			if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) {
590			c->key_len = keylen;
591			return 1;
592			}
593			EVPerror(EVP_R_INVALID_KEY_LENGTH);
594			return 0;
595		26	}
596
597			int
598			EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
599			{
600		2259	if (pad)
601		753	ctx->flags &= ~EVP_CIPH_NO_PADDING;
602			else
603		753	ctx->flags \|= EVP_CIPH_NO_PADDING;
604		753	return 1;
605			}
606
607			int
608			EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX ctx, int type, int arg, void ptr)
609			{
610			int ret;
611
612	✗✓	2272	if (!ctx->cipher) {
613			EVPerror(EVP_R_NO_CIPHER_SET);
614			return 0;
615			}
616
617	✓✓	1136	if (!ctx->cipher->ctrl) {
618		14	EVPerror(EVP_R_CTRL_NOT_IMPLEMENTED);
619		14	return 0;
620			}
621
622		1122	ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
623	✓✓	1122	if (ret == -1) {
624		2	EVPerror(EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
625		2	return 0;
626			}
627		1120	return ret;
628		1136	}
629
630			int
631			EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX ctx, unsigned char key)
632			{
633	✗✓	12	if (ctx->cipher->flags & EVP_CIPH_RAND_KEY)
634			return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key);
635		6	arc4random_buf(key, ctx->key_len);
636		6	return 1;
637		6	}
638
639			int
640			EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX out, const EVP_CIPHER_CTX in)
641			{
642	✓✗✗✓	234	if ((in == NULL) \|\| (in->cipher == NULL)) {
643			EVPerror(EVP_R_INPUT_NOT_INITIALIZED);
644			return 0;
645			}
646			#ifndef OPENSSL_NO_ENGINE
647			/* Make sure it's safe to copy a cipher context using an ENGINE */
648	✗✓✗✗	78	if (in->engine && !ENGINE_init(in->engine)) {
649			EVPerror(ERR_R_ENGINE_LIB);
650			return 0;
651			}
652			#endif
653
654		78	EVP_CIPHER_CTX_cleanup(out);
655		78	memcpy(out, in, sizeof *out);
656
657	✓✗✓✗	156	if (in->cipher_data && in->cipher->ctx_size) {
658		78	out->cipher_data = malloc(in->cipher->ctx_size);
659	✗✓	78	if (!out->cipher_data) {
660			EVPerror(ERR_R_MALLOC_FAILURE);
661			return 0;
662			}
663		78	memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size);
664		78	}
665
666	✗✓	78	if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
667			return in->cipher->ctrl((EVP_CIPHER_CTX *)in,
668			EVP_CTRL_COPY, 0, out);
669		78	return 1;
670		78	}