/* apps/dgst.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 <string.h>

 #include <stdlib.h>

 #include "apps.h"

 #include <openssl/bio.h>

 #include <openssl/err.h>

 #include <openssl/evp.h>

 #include <openssl/objects.h>

 #include <openssl/x509.h>

 #include <openssl/pem.h>

 #include <openssl/hmac.h>

 #undef BUFSIZE

 #define BUFSIZE	1024*8

 #undef PROG

 #define PROG	dgst_main

 int do_fp(BIO *out, unsigned char *buf, BIO *bp, int sep, int binout,

 	  EVP_PKEY *key, unsigned char *sigin, int siglen, const char *title,

 	  const char *file,BIO *bmd,const char *hmac_key);

 int MAIN(int, char **);

 int MAIN(int argc, char **argv)

 	{

 	ENGINE *e = NULL;

 	unsigned char *buf=NULL;

 	int i,err=0;

 	const EVP_MD *md=NULL,*m;

 	BIO *in=NULL,*inp;

 	BIO *bmd=NULL;

 	BIO *out = NULL;

 	const char *name;

 #define PROG_NAME_SIZE  39

 	char pname[PROG_NAME_SIZE+1];

 	int separator=0;

 	int debug=0;

 	int keyform=FORMAT_PEM;

 	const char *outfile = NULL, *keyfile = NULL;

 	const char *sigfile = NULL, *randfile = NULL;

 	int out_bin = -1, want_pub = 0, do_verify = 0;

 	EVP_PKEY *sigkey = NULL;

 	unsigned char *sigbuf = NULL;

 	int siglen = 0;

 	char *passargin = NULL, *passin = NULL;

 #ifndef OPENSSL_NO_ENGINE

 	char *engine=NULL;

 #endif

 	char *hmac_key=NULL;

 	apps_startup();

 	if ((buf=(unsigned char *)OPENSSL_malloc(BUFSIZE)) == NULL)

 		{

 		BIO_printf(bio_err,"out of memory\n");

 		goto end;

 		}

 	if (bio_err == NULL)

 		if ((bio_err=BIO_new(BIO_s_file())) != NULL)

 			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);

 	if (!load_config(bio_err, NULL))

 		goto end;

 	/* first check the program name */

 	program_name(argv[0],pname,sizeof pname);

 	md=EVP_get_digestbyname(pname);

 	argc--;

 	argv++;

 	while (argc > 0)

 		{

 		if ((*argv)[0] != '-') break;

 		if (strcmp(*argv,"-c") == 0)

 			separator=1;

 		else if (strcmp(*argv,"-rand") == 0)

 			{

 			if (--argc < 1) break;

 			randfile=*(++argv);

 			}

 		else if (strcmp(*argv,"-out") == 0)

 			{

 			if (--argc < 1) break;

 			outfile=*(++argv);

 			}

 		else if (strcmp(*argv,"-sign") == 0)

 			{

 			if (--argc < 1) break;

 			keyfile=*(++argv);

 			}

 		else if (!strcmp(*argv,"-passin"))

 			{

 			if (--argc < 1)

 				break;

 			passargin=*++argv;

 			}

 		else if (strcmp(*argv,"-verify") == 0)

 			{

 			if (--argc < 1) break;

 			keyfile=*(++argv);

 			want_pub = 1;

 			do_verify = 1;

 			}

 		else if (strcmp(*argv,"-prverify") == 0)

 			{

 			if (--argc < 1) break;

 			keyfile=*(++argv);

 			do_verify = 1;

 			}

 		else if (strcmp(*argv,"-signature") == 0)

 			{

 			if (--argc < 1) break;

 			sigfile=*(++argv);

 			}

 		else if (strcmp(*argv,"-keyform") == 0)

 			{

 			if (--argc < 1) break;

 			keyform=str2fmt(*(++argv));

 			}

 #ifndef OPENSSL_NO_ENGINE

 		else if (strcmp(*argv,"-engine") == 0)

 			{

 			if (--argc < 1) break;

 			engine= *(++argv);

 			}

 #endif

 		else if (strcmp(*argv,"-hex") == 0)

 			out_bin = 0;

 		else if (strcmp(*argv,"-binary") == 0)

 			out_bin = 1;

 		else if (strcmp(*argv,"-d") == 0)

 			debug=1;

 		else if (!strcmp(*argv,"-hmac"))

 			{

 			if (--argc < 1)

 				break;

 			hmac_key=*++argv;

 			}

 		else if ((m=EVP_get_digestbyname(&((*argv)[1]))) != NULL)

 			md=m;

 		else

 			break;

 		argc--;

 		argv++;

 		}

 	if (md == NULL)

 		md=EVP_md5();

 	if(do_verify && !sigfile) {

 		BIO_printf(bio_err, "No signature to verify: use the -signature option\n");

 		err = 1; 

 		goto end;

 	}

 	if ((argc > 0) && (argv[0][0] == '-')) /* bad option */

 		{

 		BIO_printf(bio_err,"unknown option '%s'\n",*argv);

 		BIO_printf(bio_err,"options are\n");

 		BIO_printf(bio_err,"-c              to output the digest with separating colons\n");

 		BIO_printf(bio_err,"-d              to output debug info\n");

 		BIO_printf(bio_err,"-hex            output as hex dump\n");

 		BIO_printf(bio_err,"-binary         output in binary form\n");

 		BIO_printf(bio_err,"-sign   file    sign digest using private key in file\n");

 		BIO_printf(bio_err,"-verify file    verify a signature using public key in file\n");

 		BIO_printf(bio_err,"-prverify file  verify a signature using private key in file\n");

 		BIO_printf(bio_err,"-keyform arg    key file format (PEM or ENGINE)\n");

 		BIO_printf(bio_err,"-signature file signature to verify\n");

 		BIO_printf(bio_err,"-binary         output in binary form\n");

 #ifndef OPENSSL_NO_ENGINE

 		BIO_printf(bio_err,"-engine e       use engine e, possibly a hardware device.\n");

 #endif

 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm (default)\n",

 			LN_md5,LN_md5);

 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",

 			LN_md4,LN_md4);

 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",

 			LN_md2,LN_md2);

 #ifndef OPENSSL_NO_SHA

 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",

 			LN_sha1,LN_sha1);

 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",

 			LN_sha,LN_sha);

 #ifndef OPENSSL_NO_SHA256

 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",

 			LN_sha224,LN_sha224);

 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",

 			LN_sha256,LN_sha256);

 #endif

 #ifndef OPENSSL_NO_SHA512

 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",

 			LN_sha384,LN_sha384);

 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",

 			LN_sha512,LN_sha512);

 #endif

 #endif

 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",

 			LN_mdc2,LN_mdc2);

 		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",

 			LN_ripemd160,LN_ripemd160);

 		err=1;

 		goto end;

 		}

 #ifndef OPENSSL_NO_ENGINE

         e = setup_engine(bio_err, engine, 0);

 #endif

 	in=BIO_new(BIO_s_file());

 	bmd=BIO_new(BIO_f_md());

 	if (debug)

 		{

 		BIO_set_callback(in,BIO_debug_callback);

 		/* needed for windows 3.1 */

 		BIO_set_callback_arg(in,(char *)bio_err);

 		}

 	if(!app_passwd(bio_err, passargin, NULL, &passin, NULL))

 		{

 		BIO_printf(bio_err, "Error getting password\n");

 		goto end;

 		}

 	if ((in == NULL) || (bmd == NULL))

 		{

 		ERR_print_errors(bio_err);

 		goto end;

 		}

 	if(out_bin == -1) {

 		if(keyfile) out_bin = 1;

 		else out_bin = 0;

 	}

 	if(randfile)

 		app_RAND_load_file(randfile, bio_err, 0);

 	if(outfile) {

 		if(out_bin)

 			out = BIO_new_file(outfile, "wb");

 		else    out = BIO_new_file(outfile, "w");

 	} else {

 		out = BIO_new_fp(stdout, BIO_NOCLOSE);

 #ifdef OPENSSL_SYS_VMS

 		{

 		BIO *tmpbio = BIO_new(BIO_f_linebuffer());

 		out = BIO_push(tmpbio, out);

 		}

 #endif

 	}

 	if(!out) {

 		BIO_printf(bio_err, "Error opening output file %s\n", 

 					outfile ? outfile : "(stdout)");

 		ERR_print_errors(bio_err);

 		goto end;

 	}

 	if(keyfile)

 		{

 		if (want_pub)

 			sigkey = load_pubkey(bio_err, keyfile, keyform, 0, NULL,

 				e, "key file");

 		else

 			sigkey = load_key(bio_err, keyfile, keyform, 0, passin,

 				e, "key file");

 		if (!sigkey)

 			{

 			/* load_[pub]key() has already printed an appropriate

 			   message */

 			goto end;

 			}

 		}

 	if(sigfile && sigkey) {

 		BIO *sigbio;

 		sigbio = BIO_new_file(sigfile, "rb");

 		siglen = EVP_PKEY_size(sigkey);

 		sigbuf = OPENSSL_malloc(siglen);

 		if(!sigbio) {

 			BIO_printf(bio_err, "Error opening signature file %s\n",

 								sigfile);

 			ERR_print_errors(bio_err);

 			goto end;

 		}

 		siglen = BIO_read(sigbio, sigbuf, siglen);

 		BIO_free(sigbio);

 		if(siglen <= 0) {

 			BIO_printf(bio_err, "Error reading signature file %s\n",

 								sigfile);

 			ERR_print_errors(bio_err);

 			goto end;

 		}

 	}

 	/* we use md as a filter, reading from 'in' */

 	if (!BIO_set_md(bmd,md))

 		{

 		BIO_printf(bio_err, "Error setting digest %s\n", pname);

 		ERR_print_errors(bio_err);

 		goto end;

 		}

 	inp=BIO_push(bmd,in);

 	if (argc == 0)

 		{

 		BIO_set_fp(in,stdin,BIO_NOCLOSE);

 		err=do_fp(out, buf,inp,separator, out_bin, sigkey, sigbuf,

 			  siglen,"","(stdin)",bmd,hmac_key);

 		}

 	else

 		{

 		name=OBJ_nid2sn(md->type);

 		for (i=0; i<argc; i++)

 			{

 			char *tmp,*tofree=NULL;

 			int r;

 			if (BIO_read_filename(in,argv[i]) <= 0)

 				{

 				perror(argv[i]);

 				err++;

 				continue;

 				}

 			if(!out_bin)

 				{

 				size_t len = strlen(name)+strlen(argv[i])+(hmac_key ? 5 : 0)+5;

 				tmp=tofree=OPENSSL_malloc(len);

 				BIO_snprintf(tmp,len,"%s%s(%s)= ",

 							 hmac_key ? "HMAC-" : "",name,argv[i]);

 				}

 			else

 				tmp="";

 			r=do_fp(out,buf,inp,separator,out_bin,sigkey,sigbuf,

 				siglen,tmp,argv[i],bmd,hmac_key);

 			if(r)

 			    err=r;

 			if(tofree)

 				OPENSSL_free(tofree);

 			(void)BIO_reset(bmd);

 			}

 		}

 end:

 	if (buf != NULL)

 		{

 		OPENSSL_cleanse(buf,BUFSIZE);

 		OPENSSL_free(buf);

 		}

 	if (in != NULL) BIO_free(in);

 	if (passin)

 		OPENSSL_free(passin);

 	BIO_free_all(out);

 	EVP_PKEY_free(sigkey);

 	if(sigbuf) OPENSSL_free(sigbuf);

 	if (bmd != NULL) BIO_free(bmd);

 	apps_shutdown();

 	OPENSSL_EXIT(err);

 	}

 int do_fp(BIO *out, unsigned char *buf, BIO *bp, int sep, int binout,

 	  EVP_PKEY *key, unsigned char *sigin, int siglen, const char *title,

 	  const char *file,BIO *bmd,const char *hmac_key)

 	{

 	unsigned int len;

 	int i;

 	EVP_MD_CTX *md_ctx;

 	HMAC_CTX hmac_ctx;

 	if (hmac_key)

 		{

 		EVP_MD *md;

 		BIO_get_md(bmd,&md);

 		HMAC_CTX_init(&hmac_ctx);

 		HMAC_Init_ex(&hmac_ctx,hmac_key,strlen(hmac_key),md, NULL);

 		BIO_get_md_ctx(bmd,&md_ctx);

 		BIO_set_md_ctx(bmd,&hmac_ctx.md_ctx);

 		}

 	for (;;)

 		{

 		i=BIO_read(bp,(char *)buf,BUFSIZE);

 		if(i < 0)

 			{

 			BIO_printf(bio_err, "Read Error in %s\n",file);

 			ERR_print_errors(bio_err);

 			return 1;

 			}

 		if (i == 0) break;

 		}

 	if(sigin)

 		{

 		EVP_MD_CTX *ctx;

 		BIO_get_md_ctx(bp, &ctx);

 		i = EVP_VerifyFinal(ctx, sigin, (unsigned int)siglen, key); 

 		if(i > 0)

 			BIO_printf(out, "Verified OK\n");

 		else if(i == 0)

 			{

 			BIO_printf(out, "Verification Failure\n");

 			return 1;

 			}

 		else

 			{

 			BIO_printf(bio_err, "Error Verifying Data\n");

 			ERR_print_errors(bio_err);

 			return 1;

 			}

 		return 0;

 		}

 	if(key)

 		{

 		EVP_MD_CTX *ctx;

 		BIO_get_md_ctx(bp, &ctx);

 		if(!EVP_SignFinal(ctx, buf, (unsigned int *)&len, key)) 

 			{

 			BIO_printf(bio_err, "Error Signing Data\n");

 			ERR_print_errors(bio_err);

 			return 1;

 			}

 		}

 	else if(hmac_key)

 		{

 		HMAC_Final(&hmac_ctx,buf,&len);

 		HMAC_CTX_cleanup(&hmac_ctx);

 		}

 	else

 		len=BIO_gets(bp,(char *)buf,BUFSIZE);

 	if(binout) BIO_write(out, buf, len);

 	else 

 		{

 		BIO_write(out,title,strlen(title));

 		for (i=0; i<(int)len; i++)

 			{

 			if (sep && (i != 0))

 				BIO_printf(out, ":");

 			BIO_printf(out, "%02x",buf[i]);

 			}

 		BIO_printf(out, "\n");

 		}

 	if (hmac_key)

 		{

 		BIO_set_md_ctx(bmd,md_ctx);

 		}

 	return 0;

 	}