[thirdparty/openssl.git] / fips / utl / fips_enc.c

/* fipe/evp/fips_enc.c */
/* 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.]
 */

#define OPENSSL_FIPSAPI

#include <stdio.h>
#include <string.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#include <openssl/fips.h>

void FIPS_cipher_ctx_init(EVP_CIPHER_CTX *ctx)
	{
	memset(ctx,0,sizeof(EVP_CIPHER_CTX));
	/* ctx->cipher=NULL; */
	}

EVP_CIPHER_CTX *FIPS_cipher_ctx_new(void)
	{
	EVP_CIPHER_CTX *ctx=OPENSSL_malloc(sizeof *ctx);
	if (ctx)
		FIPS_cipher_ctx_init(ctx);
	return ctx;
	}

/* The purpose of these is to trap programs that attempt to use non FIPS
 * algorithms in FIPS mode and ignore the errors.
 */

static int bad_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
		    const unsigned char *iv, int enc)
	{ FIPS_ERROR_IGNORED("Cipher init"); return 0;}

static int bad_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
			 const unsigned char *in, size_t inl)
	{ FIPS_ERROR_IGNORED("Cipher update"); return 0;}

/* NB: no cleanup because it is allowed after failed init */

static int bad_set_asn1(EVP_CIPHER_CTX *ctx, ASN1_TYPE *typ)
	{ FIPS_ERROR_IGNORED("Cipher set_asn1"); return 0;}
static int bad_get_asn1(EVP_CIPHER_CTX *ctx, ASN1_TYPE *typ)
	{ FIPS_ERROR_IGNORED("Cipher get_asn1"); return 0;}
static int bad_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
	{ FIPS_ERROR_IGNORED("Cipher ctrl"); return 0;}

static const EVP_CIPHER bad_cipher =
	{
	0,
	0,
	0,
	0,
	0,
	bad_init,
	bad_do_cipher,
	NULL,
	0,
	bad_set_asn1,
	bad_get_asn1,
	bad_ctrl,
	NULL
	};

int FIPS_cipherinit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
	     const unsigned char *key, const unsigned char *iv, int enc)
	{
	if(FIPS_selftest_failed())
		{
		FIPSerr(FIPS_F_FIPS_CIPHERINIT,FIPS_R_FIPS_SELFTEST_FAILED);
		ctx->cipher = &bad_cipher;
		return 0;
		}
	if (enc == -1)
		enc = ctx->encrypt;
	else
		{
		if (enc)
			enc = 1;
		ctx->encrypt = enc;
		}
	if (cipher)
		{
		/* Only FIPS ciphers allowed */
		if (FIPS_module_mode() && !(cipher->flags & EVP_CIPH_FLAG_FIPS) &&
			!(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW))
			{
			EVPerr(EVP_F_FIPS_CIPHERINIT, EVP_R_DISABLED_FOR_FIPS);
			ctx->cipher = &bad_cipher;
			return 0;
			}
		/* 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). */
		FIPS_cipher_ctx_cleanup(ctx);

		/* Restore encrypt field: it is zeroed by cleanup */
		ctx->encrypt = enc;

		ctx->cipher=cipher;
		if (ctx->cipher->ctx_size)
			{
			ctx->cipher_data=OPENSSL_malloc(ctx->cipher->ctx_size);
			if (!ctx->cipher_data)
				{
				EVPerr(EVP_F_FIPS_CIPHERINIT, 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(!FIPS_cipher_ctx_ctrl(ctx, EVP_CTRL_INIT, 0, NULL))
				{
				EVPerr(EVP_F_FIPS_CIPHERINIT, EVP_R_INITIALIZATION_ERROR);
				return 0;
				}
			}
		}
	else if(!ctx->cipher)
		{
		EVPerr(EVP_F_FIPS_CIPHERINIT, EVP_R_NO_CIPHER_SET);
		return 0;
		}
	/* we assume block size is a power of 2 in *cryptUpdate */
	OPENSSL_assert(ctx->cipher->block_size == 1
	    || ctx->cipher->block_size == 8
	    || ctx->cipher->block_size == 16);

	if(!(M_EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_CUSTOM_IV)) {
		switch(M_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:

			OPENSSL_assert(M_EVP_CIPHER_CTX_iv_length(ctx) <=
					(int)sizeof(ctx->iv));
			if(iv) memcpy(ctx->oiv, iv, M_EVP_CIPHER_CTX_iv_length(ctx));
			memcpy(ctx->iv, ctx->oiv, M_EVP_CIPHER_CTX_iv_length(ctx));
			break;

			case EVP_CIPH_CTR_MODE:
			/* Don't reuse IV for CTR mode */
			if(iv)
				memcpy(ctx->iv, iv, M_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;
	}

void FIPS_cipher_ctx_free(EVP_CIPHER_CTX *ctx)
	{
	if (ctx)
		{
		FIPS_cipher_ctx_cleanup(ctx);
		OPENSSL_free(ctx);
		}
	}

int FIPS_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)
			OPENSSL_cleanse(c->cipher_data, c->cipher->ctx_size);
		}
	if (c->cipher_data)
		OPENSSL_free(c->cipher_data);
	memset(c,0,sizeof(EVP_CIPHER_CTX));
	return 1;
	}

int FIPS_cipher_ctx_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
{
	int ret;
	if (FIPS_selftest_failed())
		{
		FIPSerr(FIPS_F_FIPS_CIPHER_CTX_CTRL, FIPS_R_SELFTEST_FAILED);
		return 0;
		}
	if(!ctx->cipher) {
		EVPerr(EVP_F_FIPS_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET);
		return 0;
	}

	if(!ctx->cipher->ctrl) {
		EVPerr(EVP_F_FIPS_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED);
		return 0;
	}

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

int FIPS_cipher_ctx_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
	{
	if ((in == NULL) || (in->cipher == NULL))
		{
		EVPerr(EVP_F_FIPS_CIPHER_CTX_COPY,EVP_R_INPUT_NOT_INITIALIZED);
		return 0;
		}

	/* Only FIPS ciphers allowed */
	if (FIPS_module_mode() && !(in->cipher->flags & EVP_CIPH_FLAG_FIPS) &&
		!(out->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW))
		{
		EVPerr(EVP_F_FIPS_CIPHER_CTX_COPY, EVP_R_DISABLED_FOR_FIPS);
		out->cipher = &bad_cipher;
		return 0;
		}

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

	if (in->cipher_data && in->cipher->ctx_size)
		{
		out->cipher_data=OPENSSL_malloc(in->cipher->ctx_size);
		if (!out->cipher_data)
			{
			EVPerr(EVP_F_FIPS_CIPHER_CTX_COPY,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;
	}

/* You can't really set the key length with FIPS, so just check that the
   caller sets the length the context already has. */
int FIPS_cipher_ctx_set_key_length(EVP_CIPHER_CTX *ctx, int keylen)
	{
	if (ctx->key_len == keylen)
		return 1;

	EVPerr(EVP_F_FIPS_CIPHER_CTX_SET_KEY_LENGTH,EVP_R_INVALID_KEY_LENGTH);
	return 0;
	}


int FIPS_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
			const unsigned char *in, unsigned int inl)
	{
	if (FIPS_selftest_failed())
		{
		FIPSerr(FIPS_F_FIPS_CIPHER, FIPS_R_SELFTEST_FAILED);
		return -1;
		}
	return ctx->cipher->do_cipher(ctx,out,in,inl);
	}
Commit	Line	Data
2b4b28dc DSH	1	/* fipe/evp/fips_enc.c */
	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
7cc684f4 DSH	59	#define OPENSSL_FIPSAPI
7cc684f4 DSH	60
2b4b28dc DSH	61	#include <stdio.h>
	62	#include <string.h>
	63	#include <openssl/evp.h>
	64	#include <openssl/err.h>
7cc684f4	65	#include <openssl/fips.h>
2b4b28dc DSH	66
	67	void FIPS_cipher_ctx_init(EVP_CIPHER_CTX *ctx)
	68	{
	69	memset(ctx,0,sizeof(EVP_CIPHER_CTX));
	70	/* ctx->cipher=NULL; */
	71	}
	72
	73	EVP_CIPHER_CTX *FIPS_cipher_ctx_new(void)
	74	{
	75	EVP_CIPHER_CTX ctx=OPENSSL_malloc(sizeof ctx);
	76	if (ctx)
	77	FIPS_cipher_ctx_init(ctx);
	78	return ctx;
	79	}
	80
25c65429 DSH	81	/* The purpose of these is to trap programs that attempt to use non FIPS
	82	* algorithms in FIPS mode and ignore the errors.
	83	*/
	84
	85	static int bad_init(EVP_CIPHER_CTX ctx, const unsigned char key,
	86	const unsigned char *iv, int enc)
	87	{ FIPS_ERROR_IGNORED("Cipher init"); return 0;}
	88
	89	static int bad_do_cipher(EVP_CIPHER_CTX ctx, unsigned char out,
	90	const unsigned char *in, size_t inl)
	91	{ FIPS_ERROR_IGNORED("Cipher update"); return 0;}
	92
	93	/* NB: no cleanup because it is allowed after failed init */
	94
	95	static int bad_set_asn1(EVP_CIPHER_CTX ctx, ASN1_TYPE typ)
	96	{ FIPS_ERROR_IGNORED("Cipher set_asn1"); return 0;}
	97	static int bad_get_asn1(EVP_CIPHER_CTX ctx, ASN1_TYPE typ)
	98	{ FIPS_ERROR_IGNORED("Cipher get_asn1"); return 0;}
	99	static int bad_ctrl(EVP_CIPHER_CTX ctx, int type, int arg, void ptr)
	100	{ FIPS_ERROR_IGNORED("Cipher ctrl"); return 0;}
	101
	102	static const EVP_CIPHER bad_cipher =
	103	{
	104	0,
	105	0,
	106	0,
	107	0,
	108	0,
	109	bad_init,
	110	bad_do_cipher,
	111	NULL,
	112	0,
	113	bad_set_asn1,
	114	bad_get_asn1,
	115	bad_ctrl,
	116	NULL
	117	};
	118
2b4b28dc DSH	119	int FIPS_cipherinit(EVP_CIPHER_CTX ctx, const EVP_CIPHER cipher,
	120	const unsigned char key, const unsigned char iv, int enc)
	121	{
25c65429 DSH	122	if(FIPS_selftest_failed())
	123	{
	124	FIPSerr(FIPS_F_FIPS_CIPHERINIT,FIPS_R_FIPS_SELFTEST_FAILED);
	125	ctx->cipher = &bad_cipher;
	126	return 0;
	127	}
2b4b28dc DSH	128	if (enc == -1)
	129	enc = ctx->encrypt;
	130	else
	131	{
	132	if (enc)
	133	enc = 1;
	134	ctx->encrypt = enc;
	135	}
	136	if (cipher)
	137	{
25c65429	138	/* Only FIPS ciphers allowed */
c2fd5989	139	if (FIPS_module_mode() && !(cipher->flags & EVP_CIPH_FLAG_FIPS) &&
25c65429 DSH	140	!(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW))
	141	{
	142	EVPerr(EVP_F_FIPS_CIPHERINIT, EVP_R_DISABLED_FOR_FIPS);
	143	ctx->cipher = &bad_cipher;
	144	return 0;
	145	}
2b4b28dc DSH	146	/* Ensure a context left lying around from last time is cleared
	147	* (the previous check attempted to avoid this if the same
	148	* ENGINE and EVP_CIPHER could be used). */
	149	FIPS_cipher_ctx_cleanup(ctx);
	150
	151	/* Restore encrypt field: it is zeroed by cleanup */
	152	ctx->encrypt = enc;
	153
	154	ctx->cipher=cipher;
	155	if (ctx->cipher->ctx_size)
	156	{
	157	ctx->cipher_data=OPENSSL_malloc(ctx->cipher->ctx_size);
	158	if (!ctx->cipher_data)
	159	{
2440d8b1	160	EVPerr(EVP_F_FIPS_CIPHERINIT, ERR_R_MALLOC_FAILURE);
2b4b28dc DSH	161	return 0;
	162	}
	163	}
	164	else
	165	{
	166	ctx->cipher_data = NULL;
	167	}
	168	ctx->key_len = cipher->key_len;
	169	ctx->flags = 0;
	170	if(ctx->cipher->flags & EVP_CIPH_CTRL_INIT)
	171	{
	172	if(!FIPS_cipher_ctx_ctrl(ctx, EVP_CTRL_INIT, 0, NULL))
	173	{
2440d8b1	174	EVPerr(EVP_F_FIPS_CIPHERINIT, EVP_R_INITIALIZATION_ERROR);
2b4b28dc DSH	175	return 0;
	176	}
	177	}
	178	}
	179	else if(!ctx->cipher)
	180	{
2440d8b1	181	EVPerr(EVP_F_FIPS_CIPHERINIT, EVP_R_NO_CIPHER_SET);
2b4b28dc DSH	182	return 0;
	183	}
	184	/* we assume block size is a power of 2 in cryptUpdate /
	185	OPENSSL_assert(ctx->cipher->block_size == 1
	186	\|\| ctx->cipher->block_size == 8
	187	\|\| ctx->cipher->block_size == 16);
	188
	189	if(!(M_EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_CUSTOM_IV)) {
	190	switch(M_EVP_CIPHER_CTX_mode(ctx)) {
	191
	192	case EVP_CIPH_STREAM_CIPHER:
	193	case EVP_CIPH_ECB_MODE:
	194	break;
	195
	196	case EVP_CIPH_CFB_MODE:
	197	case EVP_CIPH_OFB_MODE:
	198
	199	ctx->num = 0;
	200	/* fall-through */
	201
	202	case EVP_CIPH_CBC_MODE:
	203
	204	OPENSSL_assert(M_EVP_CIPHER_CTX_iv_length(ctx) <=
	205	(int)sizeof(ctx->iv));
	206	if(iv) memcpy(ctx->oiv, iv, M_EVP_CIPHER_CTX_iv_length(ctx));
	207	memcpy(ctx->iv, ctx->oiv, M_EVP_CIPHER_CTX_iv_length(ctx));
	208	break;
	209
	210	case EVP_CIPH_CTR_MODE:
	211	/* Don't reuse IV for CTR mode */
	212	if(iv)
	213	memcpy(ctx->iv, iv, M_EVP_CIPHER_CTX_iv_length(ctx));
	214	break;
	215
	216	default:
	217	return 0;
	218	break;
	219	}
	220	}
	221
	222	if(key \|\| (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
	223	if(!ctx->cipher->init(ctx,key,iv,enc)) return 0;
	224	}
	225	ctx->buf_len=0;
	226	ctx->final_used=0;
	227	ctx->block_mask=ctx->cipher->block_size-1;
	228	return 1;
	229	}
	230
	231	void FIPS_cipher_ctx_free(EVP_CIPHER_CTX *ctx)
	232	{
	233	if (ctx)
	234	{
	235	FIPS_cipher_ctx_cleanup(ctx);
	236	OPENSSL_free(ctx);
	237	}
	238	}
	239
	240	int FIPS_cipher_ctx_cleanup(EVP_CIPHER_CTX *c)
	241	{
	242	if (c->cipher != NULL)
	243	{
	244	if(c->cipher->cleanup && !c->cipher->cleanup(c))
	245	return 0;
246	/* Cleanse cipher context data */
247	if (c->cipher_data)
248	OPENSSL_cleanse(c->cipher_data, c->cipher->ctx_size);
249	}
250	if (c->cipher_data)
251	OPENSSL_free(c->cipher_data);
252	memset(c,0,sizeof(EVP_CIPHER_CTX));
253	return 1;
254	}
255
256	int FIPS_cipher_ctx_ctrl(EVP_CIPHER_CTX ctx, int type, int arg, void ptr)
257	{
258	int ret;
ad478495 DSH	259	if (FIPS_selftest_failed())
	260	{
	261	FIPSerr(FIPS_F_FIPS_CIPHER_CTX_CTRL, FIPS_R_SELFTEST_FAILED);
	262	return 0;
	263	}
2b4b28dc	264	if(!ctx->cipher) {
2440d8b1	265	EVPerr(EVP_F_FIPS_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET);
2b4b28dc DSH	266	return 0;
	267	}
	268
	269	if(!ctx->cipher->ctrl) {
2440d8b1	270	EVPerr(EVP_F_FIPS_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED);
2b4b28dc DSH	271	return 0;
	272	}
	273
	274	ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
	275	if(ret == -1) {
2440d8b1	276	EVPerr(EVP_F_FIPS_CIPHER_CTX_CTRL, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
2b4b28dc DSH	277	return 0;
	278	}
	279	return ret;
	280	}
	281
399aa6b5 RL	282	int FIPS_cipher_ctx_copy(EVP_CIPHER_CTX out, const EVP_CIPHER_CTX in)
	283	{
	284	if ((in == NULL) \|\| (in->cipher == NULL))
	285	{
	286	EVPerr(EVP_F_FIPS_CIPHER_CTX_COPY,EVP_R_INPUT_NOT_INITIALIZED);
	287	return 0;
	288	}
	289
	290	/* Only FIPS ciphers allowed */
c2fd5989	291	if (FIPS_module_mode() && !(in->cipher->flags & EVP_CIPH_FLAG_FIPS) &&
399aa6b5 RL	292	!(out->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW))
	293	{
	294	EVPerr(EVP_F_FIPS_CIPHER_CTX_COPY, EVP_R_DISABLED_FOR_FIPS);
	295	out->cipher = &bad_cipher;
	296	return 0;
	297	}
	298
	299	FIPS_cipher_ctx_cleanup(out);
	300	memcpy(out,in,sizeof *out);
	301
	302	if (in->cipher_data && in->cipher->ctx_size)
	303	{
	304	out->cipher_data=OPENSSL_malloc(in->cipher->ctx_size);
	305	if (!out->cipher_data)
	306	{
	307	EVPerr(EVP_F_FIPS_CIPHER_CTX_COPY,ERR_R_MALLOC_FAILURE);
	308	return 0;
	309	}
	310	memcpy(out->cipher_data,in->cipher_data,in->cipher->ctx_size);
	311	}
	312
	313	if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
	314	return in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out);
	315	return 1;
	316	}
	317
	318	/* You can't really set the key length with FIPS, so just check that the
	319	caller sets the length the context already has. */
	320	int FIPS_cipher_ctx_set_key_length(EVP_CIPHER_CTX *ctx, int keylen)
	321	{
	322	if (ctx->key_len == keylen)
	323	return 1;
	324
	325	EVPerr(EVP_F_FIPS_CIPHER_CTX_SET_KEY_LENGTH,EVP_R_INVALID_KEY_LENGTH);
	326	return 0;
	327	}
	328
	329
2b4b28dc DSH	330
	331	int FIPS_cipher(EVP_CIPHER_CTX ctx, unsigned char out,
	332	const unsigned char *in, unsigned int inl)
	333	{
ad478495 DSH	334	if (FIPS_selftest_failed())
	335	{
	336	FIPSerr(FIPS_F_FIPS_CIPHER, FIPS_R_SELFTEST_FAILED);
	337	return -1;
	338	}
2b4b28dc DSH	339	return ctx->cipher->do_cipher(ctx,out,in,inl);
2b4b28dc DSH	340	}