/* crypto/pem/pem_info.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/buffer.h>

 #include <openssl/objects.h>

 #include <openssl/evp.h>

 #include <openssl/x509.h>

 #include <openssl/pem.h>

 #ifndef OPENSSL_NO_RSA

 #include <openssl/rsa.h>

 #endif

 #ifndef OPENSSL_NO_DSA

 #include <openssl/dsa.h>

 #endif

 #ifndef OPENSSL_NO_FP_API

 EXPORT_C STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, void *u)

 	{

         BIO *b;

         STACK_OF(X509_INFO) *ret;

         if ((b=BIO_new(BIO_s_file())) == NULL)

 		{

 		PEMerr(PEM_F_PEM_X509_INFO_READ,ERR_R_BUF_LIB);

                 return(0);

 		}

         BIO_set_fp(b,fp,BIO_NOCLOSE);

         ret=PEM_X509_INFO_read_bio(b,sk,cb,u);

         BIO_free(b);

         return(ret);

 	}

 #endif

 EXPORT_C STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, void *u)

 	{

 	X509_INFO *xi=NULL;

 	char *name=NULL,*header=NULL;

 	void *pp;

 	unsigned char *data=NULL;

 	const unsigned char *p;

 	long len,error=0;

 	int ok=0;

 	STACK_OF(X509_INFO) *ret=NULL;

 	unsigned int i,raw;

 	d2i_of_void *d2i;

 	if (sk == NULL)

 		{

 		if ((ret=sk_X509_INFO_new_null()) == NULL)

 			{

 			PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_MALLOC_FAILURE);

 			goto err;

 			}

 		}

 	else

 		ret=sk;

 	if ((xi=X509_INFO_new()) == NULL) goto err;

 	for (;;)

 		{

 		raw=0;

 		i=PEM_read_bio(bp,&name,&header,&data,&len);

 		if (i == 0)

 			{

 			error=ERR_GET_REASON(ERR_peek_last_error());

 			if (error == PEM_R_NO_START_LINE)

 				{

 				ERR_clear_error();

 				break;

 				}

 			goto err;

 			}

 start:

 		if (	(strcmp(name,PEM_STRING_X509) == 0) ||

 			(strcmp(name,PEM_STRING_X509_OLD) == 0))

 			{

 			d2i=(D2I_OF(void))d2i_X509;

 			if (xi->x509 != NULL)

 				{

 				if (!sk_X509_INFO_push(ret,xi)) goto err;

 				if ((xi=X509_INFO_new()) == NULL) goto err;

 				goto start;

 				}

 			pp=&(xi->x509);

 			}

 		else if ((strcmp(name,PEM_STRING_X509_TRUSTED) == 0))

 			{

 			d2i=(D2I_OF(void))d2i_X509_AUX;

 			if (xi->x509 != NULL)

 				{

 				if (!sk_X509_INFO_push(ret,xi)) goto err;

 				if ((xi=X509_INFO_new()) == NULL) goto err;

 				goto start;

 				}

 			pp=&(xi->x509);

 			}

 		else if (strcmp(name,PEM_STRING_X509_CRL) == 0)

 			{

 			d2i=(D2I_OF(void))d2i_X509_CRL;

 			if (xi->crl != NULL)

 				{

 				if (!sk_X509_INFO_push(ret,xi)) goto err;

 				if ((xi=X509_INFO_new()) == NULL) goto err;

 				goto start;

 				}

 			pp=&(xi->crl);

 			}

 		else

 #ifndef OPENSSL_NO_RSA

 			if (strcmp(name,PEM_STRING_RSA) == 0)

 			{

 			d2i=(D2I_OF(void))d2i_RSAPrivateKey;

 			if (xi->x_pkey != NULL) 

 				{

 				if (!sk_X509_INFO_push(ret,xi)) goto err;

 				if ((xi=X509_INFO_new()) == NULL) goto err;

 				goto start;

 				}

 			xi->enc_data=NULL;

 			xi->enc_len=0;

 			xi->x_pkey=X509_PKEY_new();

 			if ((xi->x_pkey->dec_pkey=EVP_PKEY_new()) == NULL)

 				goto err;

 			xi->x_pkey->dec_pkey->type=EVP_PKEY_RSA;

 			pp=&(xi->x_pkey->dec_pkey->pkey.rsa);

 			if ((int)strlen(header) > 10) /* assume encrypted */

 				raw=1;

 			}

 		else

 #endif

 #ifndef OPENSSL_NO_DSA

 			if (strcmp(name,PEM_STRING_DSA) == 0)

 			{

 			d2i=(D2I_OF(void))d2i_DSAPrivateKey;

 			if (xi->x_pkey != NULL) 

 				{

 				if (!sk_X509_INFO_push(ret,xi)) goto err;

 				if ((xi=X509_INFO_new()) == NULL) goto err;

 				goto start;

 				}

 			xi->enc_data=NULL;

 			xi->enc_len=0;

 			xi->x_pkey=X509_PKEY_new();

 			if ((xi->x_pkey->dec_pkey=EVP_PKEY_new()) == NULL)

 				goto err;

 			xi->x_pkey->dec_pkey->type=EVP_PKEY_DSA;

 			pp=(char **)&(xi->x_pkey->dec_pkey->pkey.dsa);

 			if ((int)strlen(header) > 10) /* assume encrypted */

 				raw=1;

 			}

 		else

 #endif

 #ifndef OPENSSL_NO_EC

  			if (strcmp(name,PEM_STRING_ECPRIVATEKEY) == 0)

  			{

  				d2i=(D2I_OF(void))d2i_ECPrivateKey;

  				if (xi->x_pkey != NULL) 

  				{

  					if (!sk_X509_INFO_push(ret,xi)) goto err;

  					if ((xi=X509_INFO_new()) == NULL) goto err;

  						goto start;

  				}

  			xi->enc_data=NULL;

  			xi->enc_len=0;

  			xi->x_pkey=X509_PKEY_new();

  			if ((xi->x_pkey->dec_pkey=EVP_PKEY_new()) == NULL)

  				goto err;

  			xi->x_pkey->dec_pkey->type=EVP_PKEY_EC;

  			pp=&(xi->x_pkey->dec_pkey->pkey.ec);

  			if ((int)strlen(header) > 10) /* assume encrypted */

  				raw=1;

 			}

 		else

 #endif

 			{

 			d2i=NULL;

 			pp=NULL;

 			}

 		if (d2i != NULL)

 			{

 			if (!raw)

 				{

 				EVP_CIPHER_INFO cipher;

 				if (!PEM_get_EVP_CIPHER_INFO(header,&cipher))

 					goto err;

 				if (!PEM_do_header(&cipher,data,&len,cb,u))

 					goto err;

 				p=data;

 				if (d2i(pp,&p,len) == NULL)

 					{

 					PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_ASN1_LIB);

 					goto err;

 					}

 				}

 			else

 				{ /* encrypted RSA data */

 				if (!PEM_get_EVP_CIPHER_INFO(header,

 					&xi->enc_cipher)) goto err;

 				xi->enc_data=(char *)data;

 				xi->enc_len=(int)len;

 				data=NULL;

 				}

 			}

 		else	{

 			/* unknown */

 			}

 		if (name != NULL) OPENSSL_free(name);

 		if (header != NULL) OPENSSL_free(header);

 		if (data != NULL) OPENSSL_free(data);

 		name=NULL;

 		header=NULL;

 		data=NULL;

 		}

 	/* if the last one hasn't been pushed yet and there is anything

 	 * in it then add it to the stack ... 

 	 */

 	if ((xi->x509 != NULL) || (xi->crl != NULL) ||

 		(xi->x_pkey != NULL) || (xi->enc_data != NULL))

 		{

 		if (!sk_X509_INFO_push(ret,xi)) goto err;

 		xi=NULL;

 		}

 	ok=1;

 err:

 	if (xi != NULL) X509_INFO_free(xi);

 	if (!ok)

 		{

 		for (i=0; ((int)i)<sk_X509_INFO_num(ret); i++)

 			{

 			xi=sk_X509_INFO_value(ret,i);

 			X509_INFO_free(xi);

 			}

 		if (ret != sk) sk_X509_INFO_free(ret);

 		ret=NULL;

 		}

 	if (name != NULL) OPENSSL_free(name);

 	if (header != NULL) OPENSSL_free(header);

 	if (data != NULL) OPENSSL_free(data);

 	return(ret);

 	}

 /* A TJH addition */

 EXPORT_C int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,

 	     unsigned char *kstr, int klen, pem_password_cb *cb, void *u)

 	{

 	EVP_CIPHER_CTX ctx;

 	int i,ret=0;

 	unsigned char *data=NULL;

 	const char *objstr=NULL;

 	char buf[PEM_BUFSIZE];

 	unsigned char *iv=NULL;

 	if (enc != NULL)

 		{

 		objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));

 		if (objstr == NULL)

 			{

 			PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);

 			goto err;

 			}

 		}

 	/* now for the fun part ... if we have a private key then 

 	 * we have to be able to handle a not-yet-decrypted key

 	 * being written out correctly ... if it is decrypted or

 	 * it is non-encrypted then we use the base code

 	 */

 	if (xi->x_pkey!=NULL)

 		{

 		if ( (xi->enc_data!=NULL) && (xi->enc_len>0) )

 			{

 			/* copy from weirdo names into more normal things */

 			iv=xi->enc_cipher.iv;

 			data=(unsigned char *)xi->enc_data;

 			i=xi->enc_len;

 			/* we take the encryption data from the

 			 * internal stuff rather than what the

 			 * user has passed us ... as we have to 

 			 * match exactly for some strange reason

 			 */

 			objstr=OBJ_nid2sn(

 				EVP_CIPHER_nid(xi->enc_cipher.cipher));

 			if (objstr == NULL)

 				{

 				PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);

 				goto err;

 				}

 			/* create the right magic header stuff */

 			OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf);

 			buf[0]='\0';

 			PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);

 			PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);

 			/* use the normal code to write things out */

 			i=PEM_write_bio(bp,PEM_STRING_RSA,buf,data,i);

 			if (i <= 0) goto err;

 			}

 		else

 			{

 			/* Add DSA/DH */

 #ifndef OPENSSL_NO_RSA

 			/* normal optionally encrypted stuff */

 			if (PEM_write_bio_RSAPrivateKey(bp,

 				xi->x_pkey->dec_pkey->pkey.rsa,

 				enc,kstr,klen,cb,u)<=0)

 				goto err;

 #endif

 			}

 		}

 	/* if we have a certificate then write it out now */

 	if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp,xi->x509) <= 0))

 		goto err;

 	/* we are ignoring anything else that is loaded into the X509_INFO

 	 * structure for the moment ... as I don't need it so I'm not

 	 * coding it here and Eric can do it when this makes it into the

 	 * base library --tjh

 	 */

 	ret=1;

 err:

 	OPENSSL_cleanse((char *)&ctx,sizeof(ctx));

 	OPENSSL_cleanse(buf,PEM_BUFSIZE);

 	return(ret);

 	}