/* crypto/pkcs7/pk7_lib.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/objects.h>

#include <openssl/x509.h>

EXPORT_C long PKCS7_ctrl(PKCS7 *p7, int cmd, long larg, char *parg)

	{

	int nid;

	long ret;

	nid=OBJ_obj2nid(p7->type);

	switch (cmd)

		{

	case PKCS7_OP_SET_DETACHED_SIGNATURE:

		if (nid == NID_pkcs7_signed)

			{

			ret=p7->detached=(int)larg;

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

					{

					ASN1_OCTET_STRING *os;

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

					ASN1_OCTET_STRING_free(os);

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

					}

			}

		else

			{

			PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);

			ret=0;

			}

		break;

	case PKCS7_OP_GET_DETACHED_SIGNATURE:

		if (nid == NID_pkcs7_signed)

			{

			if(!p7->d.sign  || !p7->d.sign->contents->d.ptr)

				ret = 1;

			else ret = 0;

			p7->detached = ret;

			}

		else

			{

			PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);

			ret=0;

			}

		break;

	default:

		PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_UNKNOWN_OPERATION);

		ret=0;

		}

	return(ret);

	}

EXPORT_C int PKCS7_content_new(PKCS7 *p7, int type)

	{

	PKCS7 *ret=NULL;

	if ((ret=PKCS7_new()) == NULL) goto err;

	if (!PKCS7_set_type(ret,type)) goto err;

	if (!PKCS7_set_content(p7,ret)) goto err;

	return(1);

err:

	if (ret != NULL) PKCS7_free(ret);

	return(0);

	}

EXPORT_C int PKCS7_set_content(PKCS7 *p7, PKCS7 *p7_data)

	{

	int i;

	i=OBJ_obj2nid(p7->type);

	switch (i)

		{

	case NID_pkcs7_signed:

		if (p7->d.sign->contents != NULL)

			PKCS7_free(p7->d.sign->contents);

		p7->d.sign->contents=p7_data;

		break;

	case NID_pkcs7_digest:

		if (p7->d.digest->contents != NULL)

			PKCS7_free(p7->d.digest->contents);

		p7->d.digest->contents=p7_data;

		break;

	case NID_pkcs7_data:

	case NID_pkcs7_enveloped:

	case NID_pkcs7_signedAndEnveloped:

	case NID_pkcs7_encrypted:

	default:

		PKCS7err(PKCS7_F_PKCS7_SET_CONTENT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);

		goto err;

		}

	return(1);

err:

	return(0);

	}

EXPORT_C int PKCS7_set_type(PKCS7 *p7, int type)

	{

	ASN1_OBJECT *obj;

	/*PKCS7_content_free(p7);*/

	obj=OBJ_nid2obj(type); /* will not fail */

	switch (type)

		{

	case NID_pkcs7_signed:

		p7->type=obj;

		if ((p7->d.sign=PKCS7_SIGNED_new()) == NULL)

			goto err;

		if (!ASN1_INTEGER_set(p7->d.sign->version,1))

			{

			PKCS7_SIGNED_free(p7->d.sign);

			p7->d.sign=NULL;

			goto err;

			}

		break;

	case NID_pkcs7_data:

		p7->type=obj;

		if ((p7->d.data=M_ASN1_OCTET_STRING_new()) == NULL)

			goto err;

		break;

	case NID_pkcs7_signedAndEnveloped:

		p7->type=obj;

		if ((p7->d.signed_and_enveloped=PKCS7_SIGN_ENVELOPE_new())

			== NULL) goto err;

		ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1);

		if (!ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1))

			goto err;

		p7->d.signed_and_enveloped->enc_data->content_type

						= OBJ_nid2obj(NID_pkcs7_data);

		break;

	case NID_pkcs7_enveloped:

		p7->type=obj;

		if ((p7->d.enveloped=PKCS7_ENVELOPE_new())

			== NULL) goto err;

		if (!ASN1_INTEGER_set(p7->d.enveloped->version,0))

			goto err;

		p7->d.enveloped->enc_data->content_type

						= OBJ_nid2obj(NID_pkcs7_data);

		break;

	case NID_pkcs7_encrypted:

		p7->type=obj;

		if ((p7->d.encrypted=PKCS7_ENCRYPT_new())

			== NULL) goto err;

		if (!ASN1_INTEGER_set(p7->d.encrypted->version,0))

			goto err;

		p7->d.encrypted->enc_data->content_type

						= OBJ_nid2obj(NID_pkcs7_data);

		break;

	case NID_pkcs7_digest:

		p7->type=obj;

		if ((p7->d.digest=PKCS7_DIGEST_new())

			== NULL) goto err;

		if (!ASN1_INTEGER_set(p7->d.digest->version,0))

			goto err;

		break;

	default:

		PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);

		goto err;

		}

	return(1);

err:

	return(0);

	}

EXPORT_C int PKCS7_set0_type_other(PKCS7 *p7, int type, ASN1_TYPE *other)

	{

	p7->type = OBJ_nid2obj(type);

	p7->d.other = other;

	return 1;

	}

EXPORT_C int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)

	{

	int i,j,nid;

	X509_ALGOR *alg;

	STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;

	STACK_OF(X509_ALGOR) *md_sk;

	i=OBJ_obj2nid(p7->type);

	switch (i)

		{

	case NID_pkcs7_signed:

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

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

		break;

	case NID_pkcs7_signedAndEnveloped:

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

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

		break;

	default:

		PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);

		return(0);

		}

	nid=OBJ_obj2nid(psi->digest_alg->algorithm);

	/* If the digest is not currently listed, add it */

	j=0;

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

		{

		alg=sk_X509_ALGOR_value(md_sk,i);

		if (OBJ_obj2nid(alg->algorithm) == nid)

			{

			j=1;

			break;

			}

		}

	if (!j) /* we need to add another algorithm */

		{

		if(!(alg=X509_ALGOR_new())

			|| !(alg->parameter = ASN1_TYPE_new()))

			{

			X509_ALGOR_free(alg);

			PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,ERR_R_MALLOC_FAILURE);

			return(0);

		}

		alg->algorithm=OBJ_nid2obj(nid);

		alg->parameter->type = V_ASN1_NULL;

		if (!sk_X509_ALGOR_push(md_sk,alg))

			{

			X509_ALGOR_free(alg);

			return 0;

			}

		}

	if (!sk_PKCS7_SIGNER_INFO_push(signer_sk,psi))

		return 0;

	return(1);

	}

EXPORT_C int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)

	{

	int i;

	STACK_OF(X509) **sk;

	i=OBJ_obj2nid(p7->type);

	switch (i)

		{

	case NID_pkcs7_signed:

		sk= &(p7->d.sign->cert);

		break;

	case NID_pkcs7_signedAndEnveloped:

		sk= &(p7->d.signed_and_enveloped->cert);

		break;

	default:

		PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);

		return(0);

		}

	if (*sk == NULL)

		*sk=sk_X509_new_null();

	if (*sk == NULL)

		{

		PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,ERR_R_MALLOC_FAILURE);

		return 0;

		}

	CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);

	if (!sk_X509_push(*sk,x509))

		{

		X509_free(x509);

		return 0;

		}

	return(1);

	}

EXPORT_C int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)

	{

	int i;

	STACK_OF(X509_CRL) **sk;

	i=OBJ_obj2nid(p7->type);

	switch (i)

		{

	case NID_pkcs7_signed:

		sk= &(p7->d.sign->crl);

		break;

	case NID_pkcs7_signedAndEnveloped:

		sk= &(p7->d.signed_and_enveloped->crl);

		break;

	default:

		PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);

		return(0);

		}

	if (*sk == NULL)

		*sk=sk_X509_CRL_new_null();

	if (*sk == NULL)

		{

		PKCS7err(PKCS7_F_PKCS7_ADD_CRL,ERR_R_MALLOC_FAILURE);

		return 0;

		}

	CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);

	if (!sk_X509_CRL_push(*sk,crl))

		{

		X509_CRL_free(crl);

		return 0;

		}

	return(1);

	}

EXPORT_C int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,

	     const EVP_MD *dgst)

	{

	int nid;

	char is_dsa;

	if (pkey->type == EVP_PKEY_DSA || pkey->type == EVP_PKEY_EC)

		is_dsa = 1;

	else

		is_dsa = 0;

	/* We now need to add another PKCS7_SIGNER_INFO entry */

	if (!ASN1_INTEGER_set(p7i->version,1))

		goto err;

	if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,

			X509_get_issuer_name(x509)))

		goto err;

	/* because ASN1_INTEGER_set is used to set a 'long' we will do

	 * things the ugly way. */

	M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);

	if (!(p7i->issuer_and_serial->serial=

			M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))

		goto err;

	/* lets keep the pkey around for a while */

	CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);

	p7i->pkey=pkey;

	/* Set the algorithms */

	if (is_dsa) p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);

	else	

		p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));

	if (p7i->digest_alg->parameter != NULL)

		ASN1_TYPE_free(p7i->digest_alg->parameter);

	if ((p7i->digest_alg->parameter=ASN1_TYPE_new()) == NULL)

		goto err;

	p7i->digest_alg->parameter->type=V_ASN1_NULL;

	if (p7i->digest_enc_alg->parameter != NULL)

		ASN1_TYPE_free(p7i->digest_enc_alg->parameter);

	nid = EVP_PKEY_type(pkey->type);

	if (nid == EVP_PKEY_RSA)

		{

		p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_rsaEncryption);

		if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))

			goto err;

		p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;

		}

	else if (nid == EVP_PKEY_DSA)

		{

#if 1

		/* use 'dsaEncryption' OID for compatibility with other software

		 * (PKCS #7 v1.5 does specify how to handle DSA) ... */

		p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_dsa);

#else

		/* ... although the 'dsaWithSHA1' OID (as required by RFC 2630 for CMS)

		 * would make more sense. */

		p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_dsaWithSHA1);

#endif

		p7i->digest_enc_alg->parameter = NULL; /* special case for DSA: omit 'parameter'! */

		}

	else if (nid == EVP_PKEY_EC)

		{

		p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_ecdsa_with_SHA1);

		if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))

			goto err;

		p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;

		}

	else

		return(0);

	return(1);

err:

	return(0);

	}

EXPORT_C PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,

	     const EVP_MD *dgst)

	{

	PKCS7_SIGNER_INFO *si;

	if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;

	if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;

	if (!PKCS7_add_signer(p7,si)) goto err;

	return(si);

err:

	PKCS7_SIGNER_INFO_free(si);

	return(NULL);

	}

EXPORT_C int PKCS7_set_digest(PKCS7 *p7, const EVP_MD *md)

	{

	if (PKCS7_type_is_digest(p7))

		{

		if(!(p7->d.digest->md->parameter = ASN1_TYPE_new()))

			{

			PKCS7err(PKCS7_F_PKCS7_SET_DIGEST,ERR_R_MALLOC_FAILURE);

			return 0;

			}

		p7->d.digest->md->parameter->type = V_ASN1_NULL;

		p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md));

		return 1;

		}

	PKCS7err(PKCS7_F_PKCS7_SET_DIGEST,PKCS7_R_WRONG_CONTENT_TYPE);

	return 1;

	}

EXPORT_C STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)

	{

	if (PKCS7_type_is_signed(p7))

		{

		return(p7->d.sign->signer_info);

		}

	else if (PKCS7_type_is_signedAndEnveloped(p7))

		{

		return(p7->d.signed_and_enveloped->signer_info);

		}

	else

		return(NULL);

	}

EXPORT_C PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)

	{

	PKCS7_RECIP_INFO *ri;

	if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;

	if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;

	if (!PKCS7_add_recipient_info(p7,ri)) goto err;

	return(ri);

err:

	PKCS7_RECIP_INFO_free(ri);

	return(NULL);

	}

EXPORT_C int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)

	{

	int i;

	STACK_OF(PKCS7_RECIP_INFO) *sk;

	i=OBJ_obj2nid(p7->type);

	switch (i)

		{

	case NID_pkcs7_signedAndEnveloped:

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

		break;

	case NID_pkcs7_enveloped:

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

		break;

	default:

		PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);

		return(0);

		}

	if (!sk_PKCS7_RECIP_INFO_push(sk,ri))

		return 0;

	return(1);

	}

EXPORT_C int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)

	{

	if (!ASN1_INTEGER_set(p7i->version,0))

		return 0;