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dgst.c

/* 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 *sig_name, const char *md_name,
        const char *file,BIO *bmd);

static void list_md_fn(const EVP_MD *m,
                  const char *from, const char *to, void *arg)
      {
      const char *mname;
      /* Skip aliases */
      if (!m)
            return;
      mname = OBJ_nid2ln(EVP_MD_type(m));
      /* Skip shortnames */
      if (strcmp(from, mname))
            return;
      /* Skip clones */
      if (EVP_MD_flags(m) & EVP_MD_FLAG_PKEY_DIGEST)
            return;
      if (strchr(mname, ' '))
            mname= EVP_MD_name(m);
      BIO_printf(arg, "-%-14s to use the %s message digest algorithm\n",
                  mname, mname);
      }

int MAIN(int, char **);

int MAIN(int argc, char **argv)
      {
      ENGINE *e = NULL;
      unsigned char *buf=NULL;
      int i,err=1;
      const EVP_MD *md=NULL,*m;
      BIO *in=NULL,*inp;
      BIO *bmd=NULL;
      BIO *out = NULL;
#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;
      char *mac_name=NULL;
      STACK_OF(OPENSSL_STRING) *sigopts = NULL, *macopts = 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,"-r") == 0)
                  separator=2;
            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);
                  e = setup_engine(bio_err, engine, 0);
                  }
#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 (!strcmp(*argv,"-mac"))
                  {
                  if (--argc < 1)
                        break;
                  mac_name=*++argv;
                  }
            else if (strcmp(*argv,"-sigopt") == 0)
                  {
                  if (--argc < 1)
                        break;
                  if (!sigopts)
                        sigopts = sk_OPENSSL_STRING_new_null();
                  if (!sigopts || !sk_OPENSSL_STRING_push(sigopts, *(++argv)))
                        break;
                  }
            else if (strcmp(*argv,"-macopt") == 0)
                  {
                  if (--argc < 1)
                        break;
                  if (!macopts)
                        macopts = sk_OPENSSL_STRING_new_null();
                  if (!macopts || !sk_OPENSSL_STRING_push(macopts, *(++argv)))
                        break;
                  }
            else if ((m=EVP_get_digestbyname(&((*argv)[1]))) != NULL)
                  md=m;
            else
                  break;
            argc--;
            argv++;
            }


      if(do_verify && !sigfile) {
            BIO_printf(bio_err, "No signature to verify: use the -signature option\n");
            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,"-r              to output the digest in coreutils format\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,"-out filename   output to filename rather than stdout\n");
            BIO_printf(bio_err,"-signature file signature to verify\n");
            BIO_printf(bio_err,"-sigopt nm:v    signature parameter\n");
            BIO_printf(bio_err,"-hmac key       create hashed MAC with key\n");
            BIO_printf(bio_err,"-mac algorithm  create MAC (not neccessarily HMAC)\n"); 
            BIO_printf(bio_err,"-macopt nm:v    MAC algorithm parameters or key\n");
#ifndef OPENSSL_NO_ENGINE
            BIO_printf(bio_err,"-engine e       use engine e, possibly a hardware device.\n");
#endif

            EVP_MD_do_all_sorted(list_md_fn, bio_err);
            goto end;
            }

      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 ((!!mac_name + !!keyfile + !!hmac_key) > 1)
            {
            BIO_printf(bio_err, "MAC and Signing key cannot both be specified\n");
            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 (mac_name)
            {
            EVP_PKEY_CTX *mac_ctx = NULL;
            int r = 0;
            if (!init_gen_str(bio_err, &mac_ctx, mac_name,e, 0))
                  goto mac_end;
            if (macopts)
                  {
                  char *macopt;
                  for (i = 0; i < sk_OPENSSL_STRING_num(macopts); i++)
                        {
                        macopt = sk_OPENSSL_STRING_value(macopts, i);
                        if (pkey_ctrl_string(mac_ctx, macopt) <= 0)
                              {
                              BIO_printf(bio_err,
                                    "MAC parameter error \"%s\"\n",
                                    macopt);
                              ERR_print_errors(bio_err);
                              goto mac_end;
                              }
                        }
                  }
            if (EVP_PKEY_keygen(mac_ctx, &sigkey) <= 0)
                  {
                  BIO_puts(bio_err, "Error generating key\n");
                  ERR_print_errors(bio_err);
                  goto mac_end;
                  }
            r = 1;
            mac_end:
            if (mac_ctx)
                  EVP_PKEY_CTX_free(mac_ctx);
            if (r == 0)
                  goto end;
            }

      if (hmac_key)
            {
            sigkey = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, e,
                              (unsigned char *)hmac_key, -1);
            if (!sigkey)
                  goto end;
            }

      if (sigkey)
            {
            EVP_MD_CTX *mctx = NULL;
            EVP_PKEY_CTX *pctx = NULL;
            int r;
            if (!BIO_get_md_ctx(bmd, &mctx))
                  {
                  BIO_printf(bio_err, "Error getting context\n");
                  ERR_print_errors(bio_err);
                  goto end;
                  }
            if (do_verify)
                  r = EVP_DigestVerifyInit(mctx, &pctx, md, e, sigkey);
            else
                  r = EVP_DigestSignInit(mctx, &pctx, md, e, sigkey);
            if (!r)
                  {
                  BIO_printf(bio_err, "Error setting context\n");
                  ERR_print_errors(bio_err);
                  goto end;
                  }
            if (sigopts)
                  {
                  char *sigopt;
                  for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++)
                        {
                        sigopt = sk_OPENSSL_STRING_value(sigopts, i);
                        if (pkey_ctrl_string(pctx, sigopt) <= 0)
                              {
                              BIO_printf(bio_err,
                                    "parameter error \"%s\"\n",
                                    sigopt);
                              ERR_print_errors(bio_err);
                              goto end;
                              }
                        }
                  }
            }
      /* we use md as a filter, reading from 'in' */
      else
            {
            if (md == NULL)
                  md = EVP_md5(); 
            if (!BIO_set_md(bmd,md))
                  {
                  BIO_printf(bio_err, "Error setting digest %s\n", pname);
                  ERR_print_errors(bio_err);
                  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;
            }
      }
      inp=BIO_push(bmd,in);

      if (md == NULL)
            {
            EVP_MD_CTX *tctx;
            BIO_get_md_ctx(bmd, &tctx);
            md = EVP_MD_CTX_md(tctx);
            }

      if (argc == 0)
            {
            BIO_set_fp(in,stdin,BIO_NOCLOSE);
            err=do_fp(out, buf,inp,separator, out_bin, sigkey, sigbuf,
                    siglen,NULL,NULL,"stdin",bmd);
            }
      else
            {
            const char *md_name = NULL, *sig_name = NULL;
            if(!out_bin)
                  {
                  if (sigkey)
                        {
                        const EVP_PKEY_ASN1_METHOD *ameth;
                        ameth = EVP_PKEY_get0_asn1(sigkey);
                        if (ameth)
                              EVP_PKEY_asn1_get0_info(NULL, NULL,
                                    NULL, NULL, &sig_name, ameth);
                        }
                  md_name = EVP_MD_name(md);
                  }
            err = 0;
            for (i=0; i<argc; i++)
                  {
                  int r;
                  if (BIO_read_filename(in,argv[i]) <= 0)
                        {
                        perror(argv[i]);
                        err++;
                        continue;
                        }
                  else
                  r=do_fp(out,buf,inp,separator,out_bin,sigkey,sigbuf,
                        siglen,sig_name,md_name, argv[i],bmd);
                  if(r)
                      err=r;
                  (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 (sigopts)
            sk_OPENSSL_STRING_free(sigopts);
      if (macopts)
            sk_OPENSSL_STRING_free(macopts);
      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 *sig_name, const char *md_name,
        const char *file,BIO *bmd)
      {
      size_t len;
      int i;

      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_DigestVerifyFinal(ctx, sigin, (unsigned int)siglen); 
            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);
            len = BUFSIZE;
            if(!EVP_DigestSignFinal(ctx, buf, &len)) 
                  {
                  BIO_printf(bio_err, "Error Signing Data\n");
                  ERR_print_errors(bio_err);
                  return 1;
                  }
            }
      else
            {
            len=BIO_gets(bp,(char *)buf,BUFSIZE);
            if ((int)len <0)
                  {
                  ERR_print_errors(bio_err);
                  return 1;
                  }
            }

      if(binout) BIO_write(out, buf, len);
      else if (sep == 2)
            {
            for (i=0; i<(int)len; i++)
                  BIO_printf(out, "%02x",buf[i]);
            BIO_printf(out, " *%s\n", file);
            }
      else 
            {
            if (sig_name)
                  BIO_printf(out, "%s-%s(%s)= ", sig_name, md_name, file);
            else if (md_name)
                  BIO_printf(out, "%s(%s)= ", md_name, file);
            else
                  BIO_printf(out, "(%s)= ", file);
            for (i=0; i<(int)len; i++)
                  {
                  if (sep && (i != 0))
                        BIO_printf(out, ":");
                  BIO_printf(out, "%02x",buf[i]);
                  }
            BIO_printf(out, "\n");
            }
      return 0;
      }


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