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pkeyutl.c

/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 2006.
 */
/* ====================================================================
 * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
 *
 * 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 above 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 acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED 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 OpenSSL PROJECT OR
 * ITS 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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */


#include "apps.h"
#include <string.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/evp.h>

#define KEY_PRIVKEY     1
#define KEY_PUBKEY      2
#define KEY_CERT  3

static void usage(void);

#undef PROG

#define PROG pkeyutl_main

static EVP_PKEY_CTX *init_ctx(int *pkeysize,
                        char *keyfile, int keyform, int key_type,
                        char *passargin, int pkey_op, ENGINE *e);

static int setup_peer(BIO *err, EVP_PKEY_CTX *ctx, int peerform,
                                          const char *file);

static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op,
            unsigned char *out, size_t *poutlen,
            unsigned char *in, size_t inlen);

int MAIN(int argc, char **);

int MAIN(int argc, char **argv)
{
      BIO *in = NULL, *out = NULL;
      char *infile = NULL, *outfile = NULL, *sigfile = NULL;
      ENGINE *e = NULL;
      int pkey_op = EVP_PKEY_OP_SIGN, key_type = KEY_PRIVKEY;
      int keyform = FORMAT_PEM, peerform = FORMAT_PEM;
      char badarg = 0, rev = 0;
      char hexdump = 0, asn1parse = 0;
      EVP_PKEY_CTX *ctx = NULL;
      char *passargin = NULL;
      int keysize = -1;

      unsigned char *buf_in = NULL, *buf_out = NULL, *sig = NULL;
      size_t buf_outlen;
      int buf_inlen = 0, siglen = -1;

      int ret = 1, rv = -1;

      argc--;
      argv++;

      if(!bio_err) bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);

      if (!load_config(bio_err, NULL))
            goto end;
      ERR_load_crypto_strings();
      OpenSSL_add_all_algorithms();
      
      while(argc >= 1)
            {
            if (!strcmp(*argv,"-in"))
                  {
                  if (--argc < 1) badarg = 1;
                        else infile= *(++argv);
                  }
            else if (!strcmp(*argv,"-out"))
                  {
                  if (--argc < 1) badarg = 1;
                  else outfile= *(++argv);
                  }
            else if (!strcmp(*argv,"-sigfile"))
                  {
                  if (--argc < 1) badarg = 1;
                  else sigfile= *(++argv);
                  }
            else if(!strcmp(*argv, "-inkey"))
                  {
                  if (--argc < 1)
                        badarg = 1;
                  else
                        {
                        ctx = init_ctx(&keysize,
                                    *(++argv), keyform, key_type,
                                    passargin, pkey_op, e);
                        if (!ctx)
                              {
                              BIO_puts(bio_err,
                                    "Error initializing context\n");
                              ERR_print_errors(bio_err);
                              badarg = 1;
                              }
                        }
                  }
            else if (!strcmp(*argv,"-peerkey"))
                  {
                  if (--argc < 1)
                        badarg = 1;
                  else if (!setup_peer(bio_err, ctx, peerform, *(++argv)))
                        badarg = 1;
                  }
            else if (!strcmp(*argv,"-passin"))
                  {
                  if (--argc < 1) badarg = 1;
                  else passargin= *(++argv);
                  }
            else if (strcmp(*argv,"-peerform") == 0)
                  {
                  if (--argc < 1) badarg = 1;
                  else peerform=str2fmt(*(++argv));
                  }
            else if (strcmp(*argv,"-keyform") == 0)
                  {
                  if (--argc < 1) badarg = 1;
                  else keyform=str2fmt(*(++argv));
                  }
#ifndef OPENSSL_NO_ENGINE
            else if(!strcmp(*argv, "-engine"))
                  {
                  if (--argc < 1)
                        badarg = 1;
                  else
                        e = setup_engine(bio_err, *(++argv), 0);
                  }
#endif
            else if(!strcmp(*argv, "-pubin"))
                  key_type = KEY_PUBKEY;
            else if(!strcmp(*argv, "-certin"))
                  key_type = KEY_CERT;
            else if(!strcmp(*argv, "-asn1parse"))
                  asn1parse = 1;
            else if(!strcmp(*argv, "-hexdump"))
                  hexdump = 1;
            else if(!strcmp(*argv, "-sign"))
                  pkey_op = EVP_PKEY_OP_SIGN;
            else if(!strcmp(*argv, "-verify"))
                  pkey_op = EVP_PKEY_OP_VERIFY;
            else if(!strcmp(*argv, "-verifyrecover"))
                  pkey_op = EVP_PKEY_OP_VERIFYRECOVER;
            else if(!strcmp(*argv, "-rev"))
                  rev = 1;
            else if(!strcmp(*argv, "-encrypt"))
                  pkey_op = EVP_PKEY_OP_ENCRYPT;
            else if(!strcmp(*argv, "-decrypt"))
                  pkey_op = EVP_PKEY_OP_DECRYPT;
            else if(!strcmp(*argv, "-derive"))
                  pkey_op = EVP_PKEY_OP_DERIVE;
            else if (strcmp(*argv,"-pkeyopt") == 0)
                  {
                  if (--argc < 1)
                        badarg = 1;
                  else if (!ctx)
                        {
                        BIO_puts(bio_err,
                              "-pkeyopt command before -inkey\n");
                        badarg = 1;
                        }
                  else if (pkey_ctrl_string(ctx, *(++argv)) <= 0)
                        {
                        BIO_puts(bio_err, "parameter setting error\n");
                        ERR_print_errors(bio_err);
                        goto end;
                        }
                  }
            else badarg = 1;
            if(badarg)
                  {
                  usage();
                  goto end;
                  }
            argc--;
            argv++;
            }

      if (!ctx)
            {
            usage();
            goto end;
            }

      if (sigfile && (pkey_op != EVP_PKEY_OP_VERIFY))
            {
            BIO_puts(bio_err, "Signature file specified for non verify\n");
            goto end;
            }

      if (!sigfile && (pkey_op == EVP_PKEY_OP_VERIFY))
            {
            BIO_puts(bio_err, "No signature file specified for verify\n");
            goto end;
            }

/* FIXME: seed PRNG only if needed */
      app_RAND_load_file(NULL, bio_err, 0);

      if (pkey_op != EVP_PKEY_OP_DERIVE)
            {
            if(infile)
                  {
                  if(!(in = BIO_new_file(infile, "rb")))
                        {
                        BIO_puts(bio_err,
                              "Error Opening Input File\n");
                        ERR_print_errors(bio_err);    
                        goto end;
                        }
                  }
            else
                  in = BIO_new_fp(stdin, BIO_NOCLOSE);
            }

      if(outfile)
            {
            if(!(out = BIO_new_file(outfile, "wb")))
                  {
                  BIO_printf(bio_err, "Error Creating Output File\n");
                  ERR_print_errors(bio_err);    
                  goto end;
                  }
            }
      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 (sigfile)
            {
            BIO *sigbio = BIO_new_file(sigfile, "rb");
            if (!sigbio)
                  {
                  BIO_printf(bio_err, "Can't open signature file %s\n",
                                                sigfile);
                  goto end;
                  }
            siglen = bio_to_mem(&sig, keysize * 10, sigbio);
            BIO_free(sigbio);
            if (siglen <= 0)
                  {
                  BIO_printf(bio_err, "Error reading signature data\n");
                  goto end;
                  }
            }
      
      if (in)
            {
            /* Read the input data */
            buf_inlen = bio_to_mem(&buf_in, keysize * 10, in);
            if(buf_inlen <= 0)
                  {
                  BIO_printf(bio_err, "Error reading input Data\n");
                  exit(1);
                  }
            if(rev)
                  {
                  size_t i;
                  unsigned char ctmp;
                  size_t l = (size_t)buf_inlen;
                  for(i = 0; i < l/2; i++)
                        {
                        ctmp = buf_in[i];
                        buf_in[i] = buf_in[l - 1 - i];
                        buf_in[l - 1 - i] = ctmp;
                        }
                  }
            }

      if(pkey_op == EVP_PKEY_OP_VERIFY)
            {
            rv  = EVP_PKEY_verify(ctx, sig, (size_t)siglen,
                              buf_in, (size_t)buf_inlen);
            if (rv == 0)
                  BIO_puts(out, "Signature Verification Failure\n");
            else if (rv == 1)
                  BIO_puts(out, "Signature Verified Successfully\n");
            if (rv >= 0)
                  goto end;
            }
      else
            {     
            rv = do_keyop(ctx, pkey_op, NULL, (size_t *)&buf_outlen,
                        buf_in, (size_t)buf_inlen);
            if (rv > 0)
                  {
                  buf_out = OPENSSL_malloc(buf_outlen);
                  if (!buf_out)
                        rv = -1;
                  else
                        rv = do_keyop(ctx, pkey_op,
                                    buf_out, (size_t *)&buf_outlen,
                                    buf_in, (size_t)buf_inlen);
                  }
            }

      if(rv <= 0)
            {
            BIO_printf(bio_err, "Public Key operation error\n");
            ERR_print_errors(bio_err);
            goto end;
            }
      ret = 0;
      if(asn1parse)
            {
            if(!ASN1_parse_dump(out, buf_out, buf_outlen, 1, -1))
                  ERR_print_errors(bio_err);
            }
      else if(hexdump)
            BIO_dump(out, (char *)buf_out, buf_outlen);
      else
            BIO_write(out, buf_out, buf_outlen);

      end:
      if (ctx)
            EVP_PKEY_CTX_free(ctx);
      BIO_free(in);
      BIO_free_all(out);
      if (buf_in)
            OPENSSL_free(buf_in);
      if (buf_out)
            OPENSSL_free(buf_out);
      if (sig)
            OPENSSL_free(sig);
      return ret;
}

static void usage()
{
      BIO_printf(bio_err, "Usage: pkeyutl [options]\n");
      BIO_printf(bio_err, "-in file        input file\n");
      BIO_printf(bio_err, "-out file       output file\n");
      BIO_printf(bio_err, "-sigfile file signature file (verify operation only)\n");
      BIO_printf(bio_err, "-inkey file     input key\n");
      BIO_printf(bio_err, "-keyform arg    private key format - default PEM\n");
      BIO_printf(bio_err, "-pubin          input is a public key\n");
      BIO_printf(bio_err, "-certin         input is a certificate carrying a public key\n");
      BIO_printf(bio_err, "-pkeyopt X:Y    public key options\n");
      BIO_printf(bio_err, "-sign           sign with private key\n");
      BIO_printf(bio_err, "-verify         verify with public key\n");
      BIO_printf(bio_err, "-verifyrecover  verify with public key, recover original data\n");
      BIO_printf(bio_err, "-encrypt        encrypt with public key\n");
      BIO_printf(bio_err, "-decrypt        decrypt with private key\n");
      BIO_printf(bio_err, "-derive         derive shared secret\n");
      BIO_printf(bio_err, "-hexdump        hex dump output\n");
#ifndef OPENSSL_NO_ENGINE
      BIO_printf(bio_err, "-engine e       use engine e, possibly a hardware device.\n");
#endif
      BIO_printf(bio_err, "-passin arg     pass phrase source\n");

}

static EVP_PKEY_CTX *init_ctx(int *pkeysize,
                        char *keyfile, int keyform, int key_type,
                        char *passargin, int pkey_op, ENGINE *e)
      {
      EVP_PKEY *pkey = NULL;
      EVP_PKEY_CTX *ctx = NULL;
      char *passin = NULL;
      int rv = -1;
      X509 *x;
      if(((pkey_op == EVP_PKEY_OP_SIGN) || (pkey_op == EVP_PKEY_OP_DECRYPT) 
            || (pkey_op == EVP_PKEY_OP_DERIVE))
            && (key_type != KEY_PRIVKEY))
            {
            BIO_printf(bio_err, "A private key is needed for this operation\n");
            goto end;
            }
      if(!app_passwd(bio_err, passargin, NULL, &passin, NULL))
            {
            BIO_printf(bio_err, "Error getting password\n");
            goto end;
            }
      switch(key_type)
            {
            case KEY_PRIVKEY:
            pkey = load_key(bio_err, keyfile, keyform, 0,
                  passin, e, "Private Key");
            break;

            case KEY_PUBKEY:
            pkey = load_pubkey(bio_err, keyfile, keyform, 0,
                  NULL, e, "Public Key");
            break;

            case KEY_CERT:
            x = load_cert(bio_err, keyfile, keyform,
                  NULL, e, "Certificate");
            if(x)
                  {
                  pkey = X509_get_pubkey(x);
                  X509_free(x);
                  }
            break;

            }

      *pkeysize = EVP_PKEY_size(pkey);

      if (!pkey)
            goto end;

      ctx = EVP_PKEY_CTX_new(pkey, e);

      EVP_PKEY_free(pkey);

      if (!ctx)
            goto end;

      switch(pkey_op)
            {
            case EVP_PKEY_OP_SIGN:
            rv = EVP_PKEY_sign_init(ctx);
            break;

            case EVP_PKEY_OP_VERIFY:
            rv = EVP_PKEY_verify_init(ctx);
            break;

            case EVP_PKEY_OP_VERIFYRECOVER:
            rv = EVP_PKEY_verify_recover_init(ctx);
            break;

            case EVP_PKEY_OP_ENCRYPT:
            rv = EVP_PKEY_encrypt_init(ctx);
            break;

            case EVP_PKEY_OP_DECRYPT:
            rv = EVP_PKEY_decrypt_init(ctx);
            break;

            case EVP_PKEY_OP_DERIVE:
            rv = EVP_PKEY_derive_init(ctx);
            break;
            }

      if (rv <= 0)
            {
            EVP_PKEY_CTX_free(ctx);
            ctx = NULL;
            }

      end:

      if (passin)
            OPENSSL_free(passin);

      return ctx;


      }

static int setup_peer(BIO *err, EVP_PKEY_CTX *ctx, int peerform,
                                          const char *file)
      {
      EVP_PKEY *peer = NULL;
      int ret;
      if (!ctx)
            {
            BIO_puts(err, "-peerkey command before -inkey\n");
            return 0;
            }
            
      peer = load_pubkey(bio_err, file, peerform, 0, NULL, NULL, "Peer Key");

      if (!peer)
            {
            BIO_printf(bio_err, "Error reading peer key %s\n", file);
            ERR_print_errors(err);
            return 0;
            }

      ret = EVP_PKEY_derive_set_peer(ctx, peer);

      EVP_PKEY_free(peer);
      if (ret <= 0)
            ERR_print_errors(err);
      return ret;
      }

static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op,
            unsigned char *out, size_t *poutlen,
            unsigned char *in, size_t inlen)
      {
      int rv = 0;
      switch(pkey_op)
            {
            case EVP_PKEY_OP_VERIFYRECOVER:
            rv  = EVP_PKEY_verify_recover(ctx, out, poutlen, in, inlen);
            break;

            case EVP_PKEY_OP_SIGN:
            rv  = EVP_PKEY_sign(ctx, out, poutlen, in, inlen);
            break;

            case EVP_PKEY_OP_ENCRYPT:
            rv  = EVP_PKEY_encrypt(ctx, out, poutlen, in, inlen);
            break;

            case EVP_PKEY_OP_DECRYPT:
            rv  = EVP_PKEY_decrypt(ctx, out, poutlen, in, inlen);
            break; 

            case EVP_PKEY_OP_DERIVE:
            rv  = EVP_PKEY_derive(ctx, out, poutlen);
            break;

            }
      return rv;
      }

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