sl@0: /* apps/dgst.c */
sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * This package is an SSL implementation written
sl@0:  * by Eric Young (eay@cryptsoft.com).
sl@0:  * The implementation was written so as to conform with Netscapes SSL.
sl@0:  * 
sl@0:  * This library is free for commercial and non-commercial use as long as
sl@0:  * the following conditions are aheared to.  The following conditions
sl@0:  * apply to all code found in this distribution, be it the RC4, RSA,
sl@0:  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
sl@0:  * included with this distribution is covered by the same copyright terms
sl@0:  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
sl@0:  * 
sl@0:  * Copyright remains Eric Young's, and as such any Copyright notices in
sl@0:  * the code are not to be removed.
sl@0:  * If this package is used in a product, Eric Young should be given attribution
sl@0:  * as the author of the parts of the library used.
sl@0:  * This can be in the form of a textual message at program startup or
sl@0:  * in documentation (online or textual) provided with the package.
sl@0:  * 
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 3. All advertising materials mentioning features or use of this software
sl@0:  *    must display the following acknowledgement:
sl@0:  *    "This product includes cryptographic software written by
sl@0:  *     Eric Young (eay@cryptsoft.com)"
sl@0:  *    The word 'cryptographic' can be left out if the rouines from the library
sl@0:  *    being used are not cryptographic related :-).
sl@0:  * 4. If you include any Windows specific code (or a derivative thereof) from 
sl@0:  *    the apps directory (application code) you must include an acknowledgement:
sl@0:  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  * 
sl@0:  * The licence and distribution terms for any publically available version or
sl@0:  * derivative of this code cannot be changed.  i.e. this code cannot simply be
sl@0:  * copied and put under another distribution licence
sl@0:  * [including the GNU Public Licence.]
sl@0:  */
sl@0: 
sl@0: #include <stdio.h>
sl@0: #include <string.h>
sl@0: #include <stdlib.h>
sl@0: #include "apps.h"
sl@0: #include <openssl/bio.h>
sl@0: #include <openssl/err.h>
sl@0: #include <openssl/evp.h>
sl@0: #include <openssl/objects.h>
sl@0: #include <openssl/x509.h>
sl@0: #include <openssl/pem.h>
sl@0: #include <openssl/hmac.h>
sl@0: 
sl@0: #undef BUFSIZE
sl@0: #define BUFSIZE	1024*8
sl@0: 
sl@0: #undef PROG
sl@0: #define PROG	dgst_main
sl@0: 
sl@0: int do_fp(BIO *out, unsigned char *buf, BIO *bp, int sep, int binout,
sl@0: 	  EVP_PKEY *key, unsigned char *sigin, int siglen, const char *title,
sl@0: 	  const char *file,BIO *bmd,const char *hmac_key);
sl@0: 
sl@0: 
sl@0: int MAIN(int, char **);
sl@0: 
sl@0: int MAIN(int argc, char **argv)
sl@0: 	{
sl@0: 	ENGINE *e = NULL;
sl@0: 	unsigned char *buf=NULL;
sl@0: 	int i,err=0;
sl@0: 	const EVP_MD *md=NULL,*m;
sl@0: 	BIO *in=NULL,*inp;
sl@0: 	BIO *bmd=NULL;
sl@0: 	BIO *out = NULL;
sl@0: 	const char *name;
sl@0: #define PROG_NAME_SIZE  39
sl@0: 	char pname[PROG_NAME_SIZE+1];
sl@0: 	int separator=0;
sl@0: 	int debug=0;
sl@0: 	int keyform=FORMAT_PEM;
sl@0: 	const char *outfile = NULL, *keyfile = NULL;
sl@0: 	const char *sigfile = NULL, *randfile = NULL;
sl@0: 	int out_bin = -1, want_pub = 0, do_verify = 0;
sl@0: 	EVP_PKEY *sigkey = NULL;
sl@0: 	unsigned char *sigbuf = NULL;
sl@0: 	int siglen = 0;
sl@0: 	char *passargin = NULL, *passin = NULL;
sl@0: #ifndef OPENSSL_NO_ENGINE
sl@0: 	char *engine=NULL;
sl@0: #endif
sl@0: 	char *hmac_key=NULL;
sl@0: 
sl@0: 	apps_startup();
sl@0: 
sl@0: 	if ((buf=(unsigned char *)OPENSSL_malloc(BUFSIZE)) == NULL)
sl@0: 		{
sl@0: 		BIO_printf(bio_err,"out of memory\n");
sl@0: 		goto end;
sl@0: 		}
sl@0: 	if (bio_err == NULL)
sl@0: 		if ((bio_err=BIO_new(BIO_s_file())) != NULL)
sl@0: 			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
sl@0: 
sl@0: 			
sl@0: 
sl@0: 	if (!load_config(bio_err, NULL))
sl@0: 		goto end;
sl@0: 
sl@0: 	/* first check the program name */
sl@0: 	program_name(argv[0],pname,sizeof pname);
sl@0: 
sl@0: 	md=EVP_get_digestbyname(pname);
sl@0: 
sl@0: 	argc--;
sl@0: 	argv++;
sl@0: 	while (argc > 0)
sl@0: 		{
sl@0: 		if ((*argv)[0] != '-') break;
sl@0: 		if (strcmp(*argv,"-c") == 0)
sl@0: 			separator=1;
sl@0: 		else if (strcmp(*argv,"-rand") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) break;
sl@0: 			randfile=*(++argv);
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-out") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) break;
sl@0: 			outfile=*(++argv);
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-sign") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) break;
sl@0: 			keyfile=*(++argv);
sl@0: 			}
sl@0: 		else if (!strcmp(*argv,"-passin"))
sl@0: 			{
sl@0: 			if (--argc < 1)
sl@0: 				break;
sl@0: 			passargin=*++argv;
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-verify") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) break;
sl@0: 			keyfile=*(++argv);
sl@0: 			want_pub = 1;
sl@0: 			do_verify = 1;
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-prverify") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) break;
sl@0: 			keyfile=*(++argv);
sl@0: 			do_verify = 1;
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-signature") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) break;
sl@0: 			sigfile=*(++argv);
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-keyform") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) break;
sl@0: 			keyform=str2fmt(*(++argv));
sl@0: 			}
sl@0: #ifndef OPENSSL_NO_ENGINE
sl@0: 		else if (strcmp(*argv,"-engine") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) break;
sl@0: 			engine= *(++argv);
sl@0: 			}
sl@0: #endif
sl@0: 		else if (strcmp(*argv,"-hex") == 0)
sl@0: 			out_bin = 0;
sl@0: 		else if (strcmp(*argv,"-binary") == 0)
sl@0: 			out_bin = 1;
sl@0: 		else if (strcmp(*argv,"-d") == 0)
sl@0: 			debug=1;
sl@0: 		else if (!strcmp(*argv,"-hmac"))
sl@0: 			{
sl@0: 			if (--argc < 1)
sl@0: 				break;
sl@0: 			hmac_key=*++argv;
sl@0: 			}
sl@0: 		else if ((m=EVP_get_digestbyname(&((*argv)[1]))) != NULL)
sl@0: 			md=m;
sl@0: 		else
sl@0: 			break;
sl@0: 		argc--;
sl@0: 		argv++;
sl@0: 		}
sl@0: 
sl@0: 	if (md == NULL)
sl@0: 		md=EVP_md5();
sl@0: 
sl@0: 	if(do_verify && !sigfile) {
sl@0: 		BIO_printf(bio_err, "No signature to verify: use the -signature option\n");
sl@0: 		err = 1; 
sl@0: 		goto end;
sl@0: 	}
sl@0: 
sl@0: 	if ((argc > 0) && (argv[0][0] == '-')) /* bad option */
sl@0: 		{
sl@0: 		BIO_printf(bio_err,"unknown option '%s'\n",*argv);
sl@0: 		BIO_printf(bio_err,"options are\n");
sl@0: 		BIO_printf(bio_err,"-c              to output the digest with separating colons\n");
sl@0: 		BIO_printf(bio_err,"-d              to output debug info\n");
sl@0: 		BIO_printf(bio_err,"-hex            output as hex dump\n");
sl@0: 		BIO_printf(bio_err,"-binary         output in binary form\n");
sl@0: 		BIO_printf(bio_err,"-sign   file    sign digest using private key in file\n");
sl@0: 		BIO_printf(bio_err,"-verify file    verify a signature using public key in file\n");
sl@0: 		BIO_printf(bio_err,"-prverify file  verify a signature using private key in file\n");
sl@0: 		BIO_printf(bio_err,"-keyform arg    key file format (PEM or ENGINE)\n");
sl@0: 		BIO_printf(bio_err,"-signature file signature to verify\n");
sl@0: 		BIO_printf(bio_err,"-binary         output in binary form\n");
sl@0: #ifndef OPENSSL_NO_ENGINE
sl@0: 		BIO_printf(bio_err,"-engine e       use engine e, possibly a hardware device.\n");
sl@0: #endif
sl@0: 
sl@0: 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm (default)\n",
sl@0: 			LN_md5,LN_md5);
sl@0: 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
sl@0: 			LN_md4,LN_md4);
sl@0: 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
sl@0: 			LN_md2,LN_md2);
sl@0: #ifndef OPENSSL_NO_SHA
sl@0: 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
sl@0: 			LN_sha1,LN_sha1);
sl@0: 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
sl@0: 			LN_sha,LN_sha);
sl@0: #ifndef OPENSSL_NO_SHA256
sl@0: 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
sl@0: 			LN_sha224,LN_sha224);
sl@0: 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
sl@0: 			LN_sha256,LN_sha256);
sl@0: #endif
sl@0: #ifndef OPENSSL_NO_SHA512
sl@0: 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
sl@0: 			LN_sha384,LN_sha384);
sl@0: 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
sl@0: 			LN_sha512,LN_sha512);
sl@0: #endif
sl@0: #endif
sl@0: 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
sl@0: 			LN_mdc2,LN_mdc2);
sl@0: 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
sl@0: 			LN_ripemd160,LN_ripemd160);
sl@0: 		err=1;
sl@0: 		goto end;
sl@0: 		}
sl@0: 
sl@0: #ifndef OPENSSL_NO_ENGINE
sl@0:         e = setup_engine(bio_err, engine, 0);
sl@0: #endif
sl@0: 
sl@0: 	in=BIO_new(BIO_s_file());
sl@0: 	bmd=BIO_new(BIO_f_md());
sl@0: 	if (debug)
sl@0: 		{
sl@0: 		BIO_set_callback(in,BIO_debug_callback);
sl@0: 		/* needed for windows 3.1 */
sl@0: 		BIO_set_callback_arg(in,(char *)bio_err);
sl@0: 		}
sl@0: 
sl@0: 	if(!app_passwd(bio_err, passargin, NULL, &passin, NULL))
sl@0: 		{
sl@0: 		BIO_printf(bio_err, "Error getting password\n");
sl@0: 		goto end;
sl@0: 		}
sl@0: 
sl@0: 	if ((in == NULL) || (bmd == NULL))
sl@0: 		{
sl@0: 		ERR_print_errors(bio_err);
sl@0: 		goto end;
sl@0: 		}
sl@0: 
sl@0: 	if(out_bin == -1) {
sl@0: 		if(keyfile) out_bin = 1;
sl@0: 		else out_bin = 0;
sl@0: 	}
sl@0: 
sl@0: 	if(randfile)
sl@0: 		app_RAND_load_file(randfile, bio_err, 0);
sl@0: 
sl@0: 	if(outfile) {
sl@0: 		if(out_bin)
sl@0: 			out = BIO_new_file(outfile, "wb");
sl@0: 		else    out = BIO_new_file(outfile, "w");
sl@0: 	} else {
sl@0: 
sl@0: 		out = BIO_new_fp(stdout, BIO_NOCLOSE);
sl@0: #ifdef OPENSSL_SYS_VMS
sl@0: 		{
sl@0: 		BIO *tmpbio = BIO_new(BIO_f_linebuffer());
sl@0: 		out = BIO_push(tmpbio, out);
sl@0: 		}
sl@0: #endif
sl@0: 	}
sl@0: 
sl@0: 	if(!out) {
sl@0: 		BIO_printf(bio_err, "Error opening output file %s\n", 
sl@0: 					outfile ? outfile : "(stdout)");
sl@0: 		ERR_print_errors(bio_err);
sl@0: 		goto end;
sl@0: 	}
sl@0: 
sl@0: 	if(keyfile)
sl@0: 		{
sl@0: 		if (want_pub)
sl@0: 			sigkey = load_pubkey(bio_err, keyfile, keyform, 0, NULL,
sl@0: 				e, "key file");
sl@0: 		else
sl@0: 			sigkey = load_key(bio_err, keyfile, keyform, 0, passin,
sl@0: 				e, "key file");
sl@0: 		if (!sigkey)
sl@0: 			{
sl@0: 			/* load_[pub]key() has already printed an appropriate
sl@0: 			   message */
sl@0: 			goto end;
sl@0: 			}
sl@0: 		}
sl@0: 
sl@0: 	if(sigfile && sigkey) {
sl@0: 		BIO *sigbio;
sl@0: 		sigbio = BIO_new_file(sigfile, "rb");
sl@0: 		siglen = EVP_PKEY_size(sigkey);
sl@0: 		sigbuf = OPENSSL_malloc(siglen);
sl@0: 		if(!sigbio) {
sl@0: 			BIO_printf(bio_err, "Error opening signature file %s\n",
sl@0: 								sigfile);
sl@0: 			ERR_print_errors(bio_err);
sl@0: 			goto end;
sl@0: 		}
sl@0: 		siglen = BIO_read(sigbio, sigbuf, siglen);
sl@0: 		BIO_free(sigbio);
sl@0: 		if(siglen <= 0) {
sl@0: 			BIO_printf(bio_err, "Error reading signature file %s\n",
sl@0: 								sigfile);
sl@0: 			ERR_print_errors(bio_err);
sl@0: 			goto end;
sl@0: 		}
sl@0: 	}
sl@0: 		
sl@0: 
sl@0: 
sl@0: 	/* we use md as a filter, reading from 'in' */
sl@0: 	if (!BIO_set_md(bmd,md))
sl@0: 		{
sl@0: 		BIO_printf(bio_err, "Error setting digest %s\n", pname);
sl@0: 		ERR_print_errors(bio_err);
sl@0: 		goto end;
sl@0: 		}
sl@0: 		
sl@0: 	inp=BIO_push(bmd,in);
sl@0: 
sl@0: 	if (argc == 0)
sl@0: 		{
sl@0: 
sl@0: 		BIO_set_fp(in,stdin,BIO_NOCLOSE);
sl@0: 		err=do_fp(out, buf,inp,separator, out_bin, sigkey, sigbuf,
sl@0: 			  siglen,"","(stdin)",bmd,hmac_key);
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		name=OBJ_nid2sn(md->type);
sl@0: 		for (i=0; i<argc; i++)
sl@0: 			{
sl@0: 			char *tmp,*tofree=NULL;
sl@0: 			int r;
sl@0: 
sl@0: 			if (BIO_read_filename(in,argv[i]) <= 0)
sl@0: 				{
sl@0: 				perror(argv[i]);
sl@0: 				err++;
sl@0: 				continue;
sl@0: 				}
sl@0: 			if(!out_bin)
sl@0: 				{
sl@0: 				size_t len = strlen(name)+strlen(argv[i])+(hmac_key ? 5 : 0)+5;
sl@0: 				tmp=tofree=OPENSSL_malloc(len);
sl@0: 				BIO_snprintf(tmp,len,"%s%s(%s)= ",
sl@0: 							 hmac_key ? "HMAC-" : "",name,argv[i]);
sl@0: 				}
sl@0: 			else
sl@0: 				tmp="";
sl@0: 			r=do_fp(out,buf,inp,separator,out_bin,sigkey,sigbuf,
sl@0: 				siglen,tmp,argv[i],bmd,hmac_key);
sl@0: 			if(r)
sl@0: 			    err=r;
sl@0: 			if(tofree)
sl@0: 				OPENSSL_free(tofree);
sl@0: 			(void)BIO_reset(bmd);
sl@0: 			}
sl@0: 		}
sl@0: end:
sl@0: 	if (buf != NULL)
sl@0: 		{
sl@0: 		OPENSSL_cleanse(buf,BUFSIZE);
sl@0: 		OPENSSL_free(buf);
sl@0: 		}
sl@0: 	if (in != NULL) BIO_free(in);
sl@0: 	if (passin)
sl@0: 		OPENSSL_free(passin);
sl@0: 	BIO_free_all(out);
sl@0: 	EVP_PKEY_free(sigkey);
sl@0: 	if(sigbuf) OPENSSL_free(sigbuf);
sl@0: 	if (bmd != NULL) BIO_free(bmd);
sl@0: 	apps_shutdown();
sl@0: 	OPENSSL_EXIT(err);
sl@0: 	}
sl@0: 
sl@0: int do_fp(BIO *out, unsigned char *buf, BIO *bp, int sep, int binout,
sl@0: 	  EVP_PKEY *key, unsigned char *sigin, int siglen, const char *title,
sl@0: 	  const char *file,BIO *bmd,const char *hmac_key)
sl@0: 	{
sl@0: 	unsigned int len;
sl@0: 	int i;
sl@0: 	EVP_MD_CTX *md_ctx;
sl@0: 	HMAC_CTX hmac_ctx;
sl@0: 
sl@0: 	if (hmac_key)
sl@0: 		{
sl@0: 		EVP_MD *md;
sl@0: 
sl@0: 		BIO_get_md(bmd,&md);
sl@0: 		HMAC_CTX_init(&hmac_ctx);
sl@0: 		HMAC_Init_ex(&hmac_ctx,hmac_key,strlen(hmac_key),md, NULL);
sl@0: 		BIO_get_md_ctx(bmd,&md_ctx);
sl@0: 		BIO_set_md_ctx(bmd,&hmac_ctx.md_ctx);
sl@0: 		}
sl@0: 	for (;;)
sl@0: 		{
sl@0: 		i=BIO_read(bp,(char *)buf,BUFSIZE);
sl@0: 		if(i < 0)
sl@0: 			{
sl@0: 			BIO_printf(bio_err, "Read Error in %s\n",file);
sl@0: 			ERR_print_errors(bio_err);
sl@0: 			return 1;
sl@0: 			}
sl@0: 		if (i == 0) break;
sl@0: 		}
sl@0: 	if(sigin)
sl@0: 		{
sl@0: 		EVP_MD_CTX *ctx;
sl@0: 		BIO_get_md_ctx(bp, &ctx);
sl@0: 		i = EVP_VerifyFinal(ctx, sigin, (unsigned int)siglen, key); 
sl@0: 		if(i > 0)
sl@0: 			BIO_printf(out, "Verified OK\n");
sl@0: 		else if(i == 0)
sl@0: 			{
sl@0: 			BIO_printf(out, "Verification Failure\n");
sl@0: 			return 1;
sl@0: 			}
sl@0: 		else
sl@0: 			{
sl@0: 			BIO_printf(bio_err, "Error Verifying Data\n");
sl@0: 			ERR_print_errors(bio_err);
sl@0: 			return 1;
sl@0: 			}
sl@0: 		return 0;
sl@0: 		}
sl@0: 	if(key)
sl@0: 		{
sl@0: 		EVP_MD_CTX *ctx;
sl@0: 		BIO_get_md_ctx(bp, &ctx);
sl@0: 		if(!EVP_SignFinal(ctx, buf, (unsigned int *)&len, key)) 
sl@0: 			{
sl@0: 			BIO_printf(bio_err, "Error Signing Data\n");
sl@0: 			ERR_print_errors(bio_err);
sl@0: 			return 1;
sl@0: 			}
sl@0: 		}
sl@0: 	else if(hmac_key)
sl@0: 		{
sl@0: 		HMAC_Final(&hmac_ctx,buf,&len);
sl@0: 		HMAC_CTX_cleanup(&hmac_ctx);
sl@0: 		}
sl@0: 	else
sl@0: 		len=BIO_gets(bp,(char *)buf,BUFSIZE);
sl@0: 
sl@0: 	if(binout) BIO_write(out, buf, len);
sl@0: 	else 
sl@0: 		{
sl@0: 		BIO_write(out,title,strlen(title));
sl@0: 		for (i=0; i<(int)len; i++)
sl@0: 			{
sl@0: 			if (sep && (i != 0))
sl@0: 				BIO_printf(out, ":");
sl@0: 			BIO_printf(out, "%02x",buf[i]);
sl@0: 			}
sl@0: 		BIO_printf(out, "\n");
sl@0: 		}
sl@0: 	if (hmac_key)
sl@0: 		{
sl@0: 		BIO_set_md_ctx(bmd,md_ctx);
sl@0: 		}
sl@0: 	return 0;
sl@0: 	}
sl@0: