/* crypto/pkcs7/pk7_doit.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.]

  */

 #include <stdio.h>

 #include "cryptlib.h"

 #include <openssl/rand.h>

 #include <openssl/objects.h>

 #include <openssl/x509.h>

 #include <openssl/x509v3.h>

 #include <openssl/err.h>

 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,

 			 void *value);

 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid);

 static int PKCS7_type_is_other(PKCS7* p7)

 	{

 	int isOther=1;

 	int nid=OBJ_obj2nid(p7->type);

 	switch( nid )

 		{

 	case NID_pkcs7_data:

 	case NID_pkcs7_signed:

 	case NID_pkcs7_enveloped:

 	case NID_pkcs7_signedAndEnveloped:

 	case NID_pkcs7_digest:

 	case NID_pkcs7_encrypted:

 		isOther=0;

 		break;

 	default:

 		isOther=1;

 		}

 	return isOther;

 	}

 static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)

 	{

 	if ( PKCS7_type_is_data(p7))

 		return p7->d.data;

 	if ( PKCS7_type_is_other(p7) && p7->d.other

 		&& (p7->d.other->type == V_ASN1_OCTET_STRING))

 		return p7->d.other->value.octet_string;

 	return NULL;

 	}

 static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)

 	{

 	BIO *btmp;

 	const EVP_MD *md;

 	if ((btmp=BIO_new(BIO_f_md())) == NULL)

 		{

 		PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,ERR_R_BIO_LIB);

 		goto err;

 		}

 	md=EVP_get_digestbyobj(alg->algorithm);

 	if (md == NULL)

 		{

 		PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,PKCS7_R_UNKNOWN_DIGEST_TYPE);

 		goto err;

 		}

 	BIO_set_md(btmp,md);

 	if (*pbio == NULL)

 		*pbio=btmp;

 	else if (!BIO_push(*pbio,btmp))

 		{

 		PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,ERR_R_BIO_LIB);

 		goto err;

 		}

 	btmp=NULL;

 	return 1;

 	err:

 	if (btmp)

 		BIO_free(btmp);

 	return 0;

 	}

 EXPORT_C BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)

 	{

 	int i;

 	BIO *out=NULL,*btmp=NULL;

 	X509_ALGOR *xa = NULL;

 	const EVP_CIPHER *evp_cipher=NULL;

 	STACK_OF(X509_ALGOR) *md_sk=NULL;

 	STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;

 	X509_ALGOR *xalg=NULL;

 	PKCS7_RECIP_INFO *ri=NULL;

 	EVP_PKEY *pkey;

 	ASN1_OCTET_STRING *os=NULL;

 	i=OBJ_obj2nid(p7->type);

 	p7->state=PKCS7_S_HEADER;

 	switch (i)

 		{

 	case NID_pkcs7_signed:

 		md_sk=p7->d.sign->md_algs;

 		os = PKCS7_get_octet_string(p7->d.sign->contents);

 		break;

 	case NID_pkcs7_signedAndEnveloped:

 		rsk=p7->d.signed_and_enveloped->recipientinfo;

 		md_sk=p7->d.signed_and_enveloped->md_algs;

 		xalg=p7->d.signed_and_enveloped->enc_data->algorithm;

 		evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher;

 		if (evp_cipher == NULL)

 			{

 			PKCS7err(PKCS7_F_PKCS7_DATAINIT,

 						PKCS7_R_CIPHER_NOT_INITIALIZED);

 			goto err;

 			}

 		break;

 	case NID_pkcs7_enveloped:

 		rsk=p7->d.enveloped->recipientinfo;

 		xalg=p7->d.enveloped->enc_data->algorithm;

 		evp_cipher=p7->d.enveloped->enc_data->cipher;

 		if (evp_cipher == NULL)

 			{

 			PKCS7err(PKCS7_F_PKCS7_DATAINIT,

 						PKCS7_R_CIPHER_NOT_INITIALIZED);

 			goto err;

 			}

 		break;

 	case NID_pkcs7_digest:

 		xa = p7->d.digest->md;

 		os = PKCS7_get_octet_string(p7->d.digest->contents);

 		break;

 	default:

 		PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);

 	        goto err;

 		}

 	for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)

 		if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))

 			goto err;

 	if (xa && !PKCS7_bio_add_digest(&out, xa))

 			goto err;

 	if (evp_cipher != NULL)

 		{

 		unsigned char key[EVP_MAX_KEY_LENGTH];

 		unsigned char iv[EVP_MAX_IV_LENGTH];

 		int keylen,ivlen;

 		int jj,max;

 		unsigned char *tmp;

 		EVP_CIPHER_CTX *ctx;

 		if ((btmp=BIO_new(BIO_f_cipher())) == NULL)

 			{

 			PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);

 			goto err;

 			}

 		BIO_get_cipher_ctx(btmp, &ctx);

 		keylen=EVP_CIPHER_key_length(evp_cipher);

 		ivlen=EVP_CIPHER_iv_length(evp_cipher);

 		xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));

 		if (ivlen > 0)

 			if (RAND_pseudo_bytes(iv,ivlen) <= 0)

 				goto err;

 		if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1)<=0)

 			goto err;

 		if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)

 			goto err;

 		if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)

 			goto err;

 		if (ivlen > 0) {

 			if (xalg->parameter == NULL) {

 				xalg->parameter = ASN1_TYPE_new();

 				if (xalg->parameter == NULL)

 					goto err;

 			}

 			if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)

 								       goto err;

 		}

 		/* Lets do the pub key stuff :-) */

 		max=0;

 		for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)

 			{

 			ri=sk_PKCS7_RECIP_INFO_value(rsk,i);

 			if (ri->cert == NULL)

 				{

 				PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO);

 				goto err;

 				}

 			if ((pkey=X509_get_pubkey(ri->cert)) == NULL)

 				goto err;

 			jj=EVP_PKEY_size(pkey);

 			EVP_PKEY_free(pkey);

 			if (max < jj) max=jj;

 			}

 		if ((tmp=(unsigned char *)OPENSSL_malloc(max)) == NULL)

 			{

 			PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);

 			goto err;

 			}

 		for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)

 			{

 			ri=sk_PKCS7_RECIP_INFO_value(rsk,i);

 			if ((pkey=X509_get_pubkey(ri->cert)) == NULL)

 				goto err;

 			jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);

 			EVP_PKEY_free(pkey);

 			if (jj <= 0)

 				{

 				PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);

 				OPENSSL_free(tmp);

 				goto err;

 				}

 			if (!M_ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj))

 				{

 				PKCS7err(PKCS7_F_PKCS7_DATAINIT,

 					ERR_R_MALLOC_FAILURE);

 				OPENSSL_free(tmp);

 				goto err;

 				}

 			}

 		OPENSSL_free(tmp);

 		OPENSSL_cleanse(key, keylen);

 		if (out == NULL)

 			out=btmp;

 		else

 			BIO_push(out,btmp);

 		btmp=NULL;

 		}

 	if (bio == NULL)

 		{

 		if (PKCS7_is_detached(p7))

 			bio=BIO_new(BIO_s_null());

 		else if (os && os->length > 0)

 			bio = BIO_new_mem_buf(os->data, os->length);

 		if(bio == NULL)

 			{

 			bio=BIO_new(BIO_s_mem());

 			if (bio == NULL)

 				goto err;

 			BIO_set_mem_eof_return(bio,0);

 			}

 		}

 	BIO_push(out,bio);

 	bio=NULL;

 	if (0)

 		{

 err:

 		if (out != NULL)

 			BIO_free_all(out);

 		if (btmp != NULL)

 			BIO_free_all(btmp);

 		out=NULL;

 		}

 	return(out);

 	}

 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)

 	{

 	int ret;

 	ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,

 				pcert->cert_info->issuer);

 	if (ret)

 		return ret;

 	return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,

 					ri->issuer_and_serial->serial);

 	}

 /* int */

 EXPORT_C BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)

 	{

 	int i,j;

 	BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;

 	unsigned char *tmp=NULL;

 	X509_ALGOR *xa;

 	ASN1_OCTET_STRING *data_body=NULL;

 	const EVP_MD *evp_md;

 	const EVP_CIPHER *evp_cipher=NULL;

 	EVP_CIPHER_CTX *evp_ctx=NULL;

 	X509_ALGOR *enc_alg=NULL;

 	STACK_OF(X509_ALGOR) *md_sk=NULL;

 	STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;

 	X509_ALGOR *xalg=NULL;

 	PKCS7_RECIP_INFO *ri=NULL;

 	i=OBJ_obj2nid(p7->type);

 	p7->state=PKCS7_S_HEADER;

 	switch (i)

 		{

 	case NID_pkcs7_signed:

 		data_body=PKCS7_get_octet_string(p7->d.sign->contents);

 		md_sk=p7->d.sign->md_algs;

 		break;

 	case NID_pkcs7_signedAndEnveloped:

 		rsk=p7->d.signed_and_enveloped->recipientinfo;

 		md_sk=p7->d.signed_and_enveloped->md_algs;

 		data_body=p7->d.signed_and_enveloped->enc_data->enc_data;

 		enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;

 		evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);

 		if (evp_cipher == NULL)

 			{

 			PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);

 			goto err;

 			}

 		xalg=p7->d.signed_and_enveloped->enc_data->algorithm;

 		break;

 	case NID_pkcs7_enveloped:

 		rsk=p7->d.enveloped->recipientinfo;

 		enc_alg=p7->d.enveloped->enc_data->algorithm;

 		data_body=p7->d.enveloped->enc_data->enc_data;

 		evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);

 		if (evp_cipher == NULL)

 			{

 			PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);

 			goto err;

 			}

 		xalg=p7->d.enveloped->enc_data->algorithm;

 		break;

 	default:

 		PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);

 	        goto err;

 		}

 	/* We will be checking the signature */

 	if (md_sk != NULL)

 		{

 		for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)

 			{

 			xa=sk_X509_ALGOR_value(md_sk,i);

 			if ((btmp=BIO_new(BIO_f_md())) == NULL)

 				{

 				PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);

 				goto err;

 				}

 			j=OBJ_obj2nid(xa->algorithm);

 			evp_md=EVP_get_digestbynid(j);

 			if (evp_md == NULL)

 				{

 				PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);

 				goto err;

 				}

 			BIO_set_md(btmp,evp_md);

 			if (out == NULL)

 				out=btmp;

 			else

 				BIO_push(out,btmp);

 			btmp=NULL;

 			}

 		}

 	if (evp_cipher != NULL)

 		{

 #if 0

 		unsigned char key[EVP_MAX_KEY_LENGTH];

 		unsigned char iv[EVP_MAX_IV_LENGTH];

 		unsigned char *p;

 		int keylen,ivlen;

 		int max;

 		X509_OBJECT ret;

 #endif

 		int jj;

 		if ((etmp=BIO_new(BIO_f_cipher())) == NULL)

 			{

 			PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);

 			goto err;

 			}

 		/* It was encrypted, we need to decrypt the secret key

 		 * with the private key */

 		/* Find the recipientInfo which matches the passed certificate

 		 * (if any)

 		 */

 		if (pcert) {

 			for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++) {

 				ri=sk_PKCS7_RECIP_INFO_value(rsk,i);

 				if (!pkcs7_cmp_ri(ri, pcert))

 					break;

 				ri=NULL;

 			}

 			if (ri == NULL) {

 				PKCS7err(PKCS7_F_PKCS7_DATADECODE,

 				      PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);

 				goto err;

 			}

 		}

 		jj=EVP_PKEY_size(pkey);

 		tmp=(unsigned char *)OPENSSL_malloc(jj+10);

 		if (tmp == NULL)

 			{

 			PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_MALLOC_FAILURE);

 			goto err;

 			}

 		/* If we haven't got a certificate try each ri in turn */

 		if (pcert == NULL)

 			{

 			for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)

 				{

 				ri=sk_PKCS7_RECIP_INFO_value(rsk,i);

 				jj=EVP_PKEY_decrypt(tmp,

 					M_ASN1_STRING_data(ri->enc_key),

 					M_ASN1_STRING_length(ri->enc_key),

 						pkey);

 				if (jj > 0)

 					break;

 				ERR_clear_error();

 				ri = NULL;

 				}

 			if (ri == NULL)

 				{

 				PKCS7err(PKCS7_F_PKCS7_DATADECODE,

 				      PKCS7_R_NO_RECIPIENT_MATCHES_KEY);

 				goto err;

 				}

 			}

 		else

 			{

 			jj=EVP_PKEY_decrypt(tmp,

 				M_ASN1_STRING_data(ri->enc_key),

 				M_ASN1_STRING_length(ri->enc_key), pkey);

 			if (jj <= 0)

 				{

 				PKCS7err(PKCS7_F_PKCS7_DATADECODE,

 								ERR_R_EVP_LIB);

 				goto err;

 				}

 			}

 		evp_ctx=NULL;

 		BIO_get_cipher_ctx(etmp,&evp_ctx);

 		if (EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0) <= 0)

 			goto err;

 		if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)

 			goto err;

 		if (jj != EVP_CIPHER_CTX_key_length(evp_ctx)) {

 			/* Some S/MIME clients don't use the same key

 			 * and effective key length. The key length is

 			 * determined by the size of the decrypted RSA key.

 			 */

 			if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, jj))

 				{

 				PKCS7err(PKCS7_F_PKCS7_DATADECODE,

 					PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);

 				goto err;

 				}

 		} 

 		if (EVP_CipherInit_ex(evp_ctx,NULL,NULL,tmp,NULL,0) <= 0)

 			goto err;

 		OPENSSL_cleanse(tmp,jj);

 		if (out == NULL)

 			out=etmp;

 		else

 			BIO_push(out,etmp);

 		etmp=NULL;

 		}

 #if 1

 	if (PKCS7_is_detached(p7) || (in_bio != NULL))

 		{

 		bio=in_bio;

 		}

 	else 

 		{

 #if 0

 		bio=BIO_new(BIO_s_mem());

 		/* We need to set this so that when we have read all

 		 * the data, the encrypt BIO, if present, will read

 		 * EOF and encode the last few bytes */

 		BIO_set_mem_eof_return(bio,0);

 		if (data_body->length > 0)

 			BIO_write(bio,(char *)data_body->data,data_body->length);

 #else

 		if (data_body->length > 0)

 		      bio = BIO_new_mem_buf(data_body->data,data_body->length);

 		else {

 			bio=BIO_new(BIO_s_mem());

 			BIO_set_mem_eof_return(bio,0);

 		}

 		if (bio == NULL)

 			goto err;

 #endif

 		}

 	BIO_push(out,bio);

 	bio=NULL;

 #endif

 	if (0)

 		{

 err:

 		if (out != NULL) BIO_free_all(out);

 		if (btmp != NULL) BIO_free_all(btmp);

 		if (etmp != NULL) BIO_free_all(etmp);

 		if (bio != NULL) BIO_free_all(bio);

 		out=NULL;

 		}

 	if (tmp != NULL)

 		OPENSSL_free(tmp);

 	return(out);

 	}

 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)

 	{

 	for (;;)

 		{

 		bio=BIO_find_type(bio,BIO_TYPE_MD);

 		if (bio == NULL)

 			{

 			PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);

 			return NULL;	

 			}

 		BIO_get_md_ctx(bio,pmd);

 		if (*pmd == NULL)

 			{

 			PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,ERR_R_INTERNAL_ERROR);

 			return NULL;

 			}	

 		if (EVP_MD_CTX_type(*pmd) == nid)

 			return bio;

 		bio=BIO_next(bio);

 		}

 	return NULL;

 	}

 EXPORT_C int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)

 	{

 	int ret=0;

 	int i,j;

 	BIO *btmp;

 	BUF_MEM *buf_mem=NULL;

 	BUF_MEM *buf=NULL;

 	PKCS7_SIGNER_INFO *si;

 	EVP_MD_CTX *mdc,ctx_tmp;

 	STACK_OF(X509_ATTRIBUTE) *sk;

 	STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;

 	ASN1_OCTET_STRING *os=NULL;

 	EVP_MD_CTX_init(&ctx_tmp);

 	i=OBJ_obj2nid(p7->type);

 	p7->state=PKCS7_S_HEADER;

 	switch (i)

 		{

 	case NID_pkcs7_signedAndEnveloped:

 		/* XXXXXXXXXXXXXXXX */

 		si_sk=p7->d.signed_and_enveloped->signer_info;

 		if (!(os=M_ASN1_OCTET_STRING_new()))

 			{

 			PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);

 			goto err;

 			}

 		p7->d.signed_and_enveloped->enc_data->enc_data=os;

 		break;

 	case NID_pkcs7_enveloped:

 		/* XXXXXXXXXXXXXXXX */

 		if (!(os=M_ASN1_OCTET_STRING_new()))

 			{

 			PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);

 			goto err;

 			}

 		p7->d.enveloped->enc_data->enc_data=os;

 		break;

 	case NID_pkcs7_signed:

 		si_sk=p7->d.sign->signer_info;

 		os=PKCS7_get_octet_string(p7->d.sign->contents);

 		/* If detached data then the content is excluded */

 		if(PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {

 			M_ASN1_OCTET_STRING_free(os);

 			p7->d.sign->contents->d.data = NULL;

 		}

 		break;

 	case NID_pkcs7_digest:

 		os=PKCS7_get_octet_string(p7->d.digest->contents);

 		/* If detached data then the content is excluded */

 		if(PKCS7_type_is_data(p7->d.digest->contents) && p7->detached)

 			{

 			M_ASN1_OCTET_STRING_free(os);

 			p7->d.digest->contents->d.data = NULL;

 			}

 		break;

 		}

 	if (si_sk != NULL)

 		{

 		if ((buf=BUF_MEM_new()) == NULL)

 			{

 			PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_BIO_LIB);

 			goto err;

 			}

 		for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)

 			{

 			si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);

 			if (si->pkey == NULL) continue;

 			j=OBJ_obj2nid(si->digest_alg->algorithm);

 			btmp=bio;

 			btmp = PKCS7_find_digest(&mdc, btmp, j);

 			if (btmp == NULL)

 				goto err;

 			/* We now have the EVP_MD_CTX, lets do the

 			 * signing. */

 			EVP_MD_CTX_copy_ex(&ctx_tmp,mdc);

 			if (!BUF_MEM_grow_clean(buf,EVP_PKEY_size(si->pkey)))

 				{

 				PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_BIO_LIB);

 				goto err;

 				}

 			sk=si->auth_attr;

 			/* If there are attributes, we add the digest

 			 * attribute and only sign the attributes */

 			if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))

 				{

 				unsigned char md_data[EVP_MAX_MD_SIZE], *abuf=NULL;

 				unsigned int md_len, alen;

 				ASN1_OCTET_STRING *digest;

 				ASN1_UTCTIME *sign_time;

 				const EVP_MD *md_tmp;

 				/* Add signing time if not already present */

 				if (!PKCS7_get_signed_attribute(si,

 							NID_pkcs9_signingTime))

 					{

 					if (!(sign_time=X509_gmtime_adj(NULL,0)))

 						{

 						PKCS7err(PKCS7_F_PKCS7_DATAFINAL,

 							ERR_R_MALLOC_FAILURE);

 						goto err;

 						}

 					if (!PKCS7_add_signed_attribute(si,

 						NID_pkcs9_signingTime,

 						V_ASN1_UTCTIME,sign_time))

 						{

 						M_ASN1_UTCTIME_free(sign_time);

 						goto err;

 						}

 					}

 				/* Add digest */

 				md_tmp=EVP_MD_CTX_md(&ctx_tmp);

 				EVP_DigestFinal_ex(&ctx_tmp,md_data,&md_len);

 				if (!(digest=M_ASN1_OCTET_STRING_new()))

 					{

 					PKCS7err(PKCS7_F_PKCS7_DATAFINAL,

 						ERR_R_MALLOC_FAILURE);

 					goto err;

 					}

 				if (!M_ASN1_OCTET_STRING_set(digest,md_data,

 								md_len))

 					{

 					PKCS7err(PKCS7_F_PKCS7_DATAFINAL,

 						ERR_R_MALLOC_FAILURE);

 					M_ASN1_OCTET_STRING_free(digest);

 					goto err;

 					}

 				if (!PKCS7_add_signed_attribute(si,

 					NID_pkcs9_messageDigest,

 					V_ASN1_OCTET_STRING,digest))

 					{

 					M_ASN1_OCTET_STRING_free(digest);

 					goto err;

 					}

 				/* Now sign the attributes */

 				EVP_SignInit_ex(&ctx_tmp,md_tmp,NULL);

 				alen = ASN1_item_i2d((ASN1_VALUE *)sk,&abuf,

 							ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));

 				if(!abuf) goto err;

 				EVP_SignUpdate(&ctx_tmp,abuf,alen);

 				OPENSSL_free(abuf);

 				}

 #ifndef OPENSSL_NO_DSA

 			if (si->pkey->type == EVP_PKEY_DSA)

 				ctx_tmp.digest=EVP_dss1();

 #endif

 #ifndef OPENSSL_NO_ECDSA

  			if (si->pkey->type == EVP_PKEY_EC)

  				ctx_tmp.digest=EVP_ecdsa();

 #endif

 			if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,

 				(unsigned int *)&buf->length,si->pkey))

 				{

 				PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_EVP_LIB);

 				goto err;

 				}

 			if (!ASN1_STRING_set(si->enc_digest,

 				(unsigned char *)buf->data,buf->length))

 				{

 				PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_ASN1_LIB);

 				goto err;

 				}

 			}

 		}

 	else if (i == NID_pkcs7_digest)

 		{

 		unsigned char md_data[EVP_MAX_MD_SIZE];

 		unsigned int md_len;

 		if (!PKCS7_find_digest(&mdc, bio,

 				OBJ_obj2nid(p7->d.digest->md->algorithm)))

 			goto err;

 		EVP_DigestFinal_ex(mdc,md_data,&md_len);

 		M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);

 		}

 	if (!PKCS7_is_detached(p7))

 		{

 		btmp=BIO_find_type(bio,BIO_TYPE_MEM);

 		if (btmp == NULL)

 			{

 			PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);

 			goto err;

 			}

 		BIO_get_mem_ptr(btmp,&buf_mem);

 		/* Mark the BIO read only then we can use its copy of the data

 		 * instead of making an extra copy.

 		 */

 		BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);

 		BIO_set_mem_eof_return(btmp, 0);

 		os->data = (unsigned char *)buf_mem->data;

 		os->length = buf_mem->length;

 #if 0

 		M_ASN1_OCTET_STRING_set(os,

 			(unsigned char *)buf_mem->data,buf_mem->length);

 #endif

 		}

 	ret=1;

 err:

 	EVP_MD_CTX_cleanup(&ctx_tmp);

 	if (buf != NULL) BUF_MEM_free(buf);

 	return(ret);

 	}

 EXPORT_C int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,

 	     PKCS7 *p7, PKCS7_SIGNER_INFO *si)

 	{

 	PKCS7_ISSUER_AND_SERIAL *ias;

 	int ret=0,i;

 	STACK_OF(X509) *cert;

 	X509 *x509;

 	if (PKCS7_type_is_signed(p7))

 		{

 		cert=p7->d.sign->cert;

 		}

 	else if (PKCS7_type_is_signedAndEnveloped(p7))

 		{

 		cert=p7->d.signed_and_enveloped->cert;

 		}

 	else

 		{

 		PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);

 		goto err;

 		}

 	/* XXXXXXXXXXXXXXXXXXXXXXX */

 	ias=si->issuer_and_serial;

 	x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);

 	/* were we able to find the cert in passed to us */

 	if (x509 == NULL)

 		{

 		PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);

 		goto err;

 		}

 	/* Lets verify */

 	if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert))

 		{

 		PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);

 		goto err;

 		}

 	X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);

 	i=X509_verify_cert(ctx);

 	if (i <= 0) 

 		{

 		PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);

 		X509_STORE_CTX_cleanup(ctx);

 		goto err;

 		}

 	X509_STORE_CTX_cleanup(ctx);

 	return PKCS7_signatureVerify(bio, p7, si, x509);

 	err:

 	return ret;

 	}

 EXPORT_C int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,

 								X509 *x509)

 	{

 	ASN1_OCTET_STRING *os;

 	EVP_MD_CTX mdc_tmp,*mdc;

 	int ret=0,i;

 	int md_type;

 	STACK_OF(X509_ATTRIBUTE) *sk;

 	BIO *btmp;

 	EVP_PKEY *pkey;

 	EVP_MD_CTX_init(&mdc_tmp);

 	if (!PKCS7_type_is_signed(p7) && 

 				!PKCS7_type_is_signedAndEnveloped(p7)) {

 		PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,

 						PKCS7_R_WRONG_PKCS7_TYPE);

 		goto err;

 	}

 	md_type=OBJ_obj2nid(si->digest_alg->algorithm);

 	btmp=bio;

 	for (;;)

 		{

 		if ((btmp == NULL) ||

 			((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))

 			{

 			PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,

 					PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);

 			goto err;

 			}

 		BIO_get_md_ctx(btmp,&mdc);

 		if (mdc == NULL)

 			{

 			PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,

 							ERR_R_INTERNAL_ERROR);

 			goto err;

 			}

 		if (EVP_MD_CTX_type(mdc) == md_type)

 			break;

 		/* Workaround for some broken clients that put the signature

 		 * OID instead of the digest OID in digest_alg->algorithm

 		 */

 		if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)

 			break;

 		btmp=BIO_next(btmp);

 		}

 	/* mdc is the digest ctx that we want, unless there are attributes,

 	 * in which case the digest is the signed attributes */

 	EVP_MD_CTX_copy_ex(&mdc_tmp,mdc);

 	sk=si->auth_attr;

 	if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))

 		{

 		unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;

                 unsigned int md_len, alen;

 		ASN1_OCTET_STRING *message_digest;

 		EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len);

 		message_digest=PKCS7_digest_from_attributes(sk);

 		if (!message_digest)

 			{

 			PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,

 					PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);

 			goto err;

 			}

 		if ((message_digest->length != (int)md_len) ||

 			(memcmp(message_digest->data,md_dat,md_len)))

 			{

 #if 0

 {

 int ii;

 for (ii=0; ii<message_digest->length; ii++)

 	printf("%02X",message_digest->data[ii]); printf(" sent\n");

 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");

 }

 #endif

 			PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,

 							PKCS7_R_DIGEST_FAILURE);

 			ret= -1;

 			goto err;

 			}

 		EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL);

 		alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,

 						ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));

 		EVP_VerifyUpdate(&mdc_tmp, abuf, alen);

 		OPENSSL_free(abuf);

 		}

 	os=si->enc_digest;

 	pkey = X509_get_pubkey(x509);

 	if (!pkey)

 		{

 		ret = -1;

 		goto err;

 		}

 #ifndef OPENSSL_NO_DSA

 	if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1();

 #endif

 #ifndef OPENSSL_NO_ECDSA

 	if (pkey->type == EVP_PKEY_EC) mdc_tmp.digest=EVP_ecdsa();

 #endif

 	i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);

 	EVP_PKEY_free(pkey);

 	if (i <= 0)

 		{

 		PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,

 						PKCS7_R_SIGNATURE_FAILURE);

 		ret= -1;

 		goto err;

 		}

 	else

 		ret=1;

 err:

 	EVP_MD_CTX_cleanup(&mdc_tmp);

 	return(ret);

 	}

 EXPORT_C PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)

 	{

 	STACK_OF(PKCS7_RECIP_INFO) *rsk;

 	PKCS7_RECIP_INFO *ri;

 	int i;

 	i=OBJ_obj2nid(p7->type);

 	if (i != NID_pkcs7_signedAndEnveloped)

 		return NULL;

 	if (p7->d.signed_and_enveloped == NULL)

 		return NULL;

 	rsk=p7->d.signed_and_enveloped->recipientinfo;

 	if (rsk == NULL)

 		return NULL;

 	ri=sk_PKCS7_RECIP_INFO_value(rsk,0);

 	if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);

 	ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);

 	return(ri->issuer_and_serial);

 	}

 EXPORT_C ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)

 	{

 	return(get_attribute(si->auth_attr,nid));

 	}

 EXPORT_C ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)

 	{

 	return(get_attribute(si->unauth_attr,nid));

 	}

 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)

 	{

 	int i;

 	X509_ATTRIBUTE *xa;

 	ASN1_OBJECT *o;

 	o=OBJ_nid2obj(nid);

 	if (!o || !sk) return(NULL);

 	for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)

 		{

 		xa=sk_X509_ATTRIBUTE_value(sk,i);

 		if (OBJ_cmp(xa->object,o) == 0)

 			{

 			if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))

 				return(sk_ASN1_TYPE_value(xa->value.set,0));

 			else

 				return(NULL);

 			}

 		}

 	return(NULL);

 	}

 EXPORT_C ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)

 {

 	ASN1_TYPE *astype;

 	if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;

 	return astype->value.octet_string;

 }

 EXPORT_C int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,

 				STACK_OF(X509_ATTRIBUTE) *sk)

 	{

 	int i;

 	if (p7si->auth_attr != NULL)

 		sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);

 	p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);

 	if (p7si->auth_attr == NULL)

 		return 0;

 	for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)

 		{

 		if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,

 			X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))

 		    == NULL)

 			return(0);

 		}

 	return(1);

 	}

 EXPORT_C int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)

 	{

 	int i;

 	if (p7si->unauth_attr != NULL)

 		sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,

 					   X509_ATTRIBUTE_free);

 	p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);

 	if (p7si->unauth_attr == NULL)

 		return 0;

 	for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)

 		{

 		if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,

                         X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))

 		    == NULL)

 			return(0);

 		}

 	return(1);

 	}

 EXPORT_C int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,

 	     void *value)

 	{

 	return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));

 	}

 EXPORT_C int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,

 	     void *value)

 	{

 	return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));

 	}

 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,

 			 void *value)

 	{

 	X509_ATTRIBUTE *attr=NULL;

 	if (*sk == NULL)

 		{

 		if (!(*sk = sk_X509_ATTRIBUTE_new_null()))

 			return 0;

 new_attrib:

 		if (!(attr=X509_ATTRIBUTE_create(nid,atrtype,value)))

 			return 0;

 		if (!sk_X509_ATTRIBUTE_push(*sk,attr))

 			{

 			X509_ATTRIBUTE_free(attr);

 			return 0;

 			}

 		}

 	else

 		{

 		int i;

 		for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)

 			{

 			attr=sk_X509_ATTRIBUTE_value(*sk,i);

 			if (OBJ_obj2nid(attr->object) == nid)

 				{

 				X509_ATTRIBUTE_free(attr);

 				attr=X509_ATTRIBUTE_create(nid,atrtype,value);

 				if (attr == NULL)

 					return 0;

 				if (!sk_X509_ATTRIBUTE_set(*sk,i,attr))

 					{

 					X509_ATTRIBUTE_free(attr);

 					return 0;

 					}

 				goto end;

 				}

 			}

 		goto new_attrib;

 		}

 end:

 	return(1);

 	}