rsa.c

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/* apps/rsa.c */
/* Copyright (C) 1995-1998 Eric Young ([email protected])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([email protected]).
 * 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 ([email protected]).
 * 
 * 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 ([email protected])"
 *    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 ([email protected])"
 * 
 * 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 <openssl/opensslconf.h>
#ifndef OPENSSL_NO_RSA
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/rsa.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/bn.h>

#undef PROG
#define PROG    rsa_main

/* -inform arg  - input format - default PEM (one of DER, NET or PEM)
 * -outform arg - output format - default PEM
 * -in arg  - input file - default stdin
 * -out arg - output file - default stdout
 * -des     - encrypt output if PEM format with DES in cbc mode
 * -des3    - encrypt output if PEM format
 * -idea    - encrypt output if PEM format
 * -seed    - encrypt output if PEM format
 * -aes128  - encrypt output if PEM format
 * -aes192  - encrypt output if PEM format
 * -aes256  - encrypt output if PEM format
 * -camellia128 - encrypt output if PEM format
 * -camellia192 - encrypt output if PEM format
 * -camellia256 - encrypt output if PEM format
 * -text    - print a text version
 * -modulus - print the RSA key modulus
 * -check   - verify key consistency
 * -pubin   - Expect a public key in input file.
 * -pubout  - Output a public key.
 */

int MAIN(int, char **);

int MAIN(int argc, char **argv)
    {
    ENGINE *e = NULL;
    int ret=1;
    RSA *rsa=NULL;
    int i,badops=0, sgckey=0;
    const EVP_CIPHER *enc=NULL;
    BIO *out=NULL;
    int informat,outformat,text=0,check=0,noout=0;
    int pubin = 0, pubout = 0;
    char *infile,*outfile,*prog;
    char *passargin = NULL, *passargout = NULL;
    char *passin = NULL, *passout = NULL;
#ifndef OPENSSL_NO_ENGINE
    char *engine=NULL;
#endif
    int modulus=0;

    int pvk_encr = 2;

    apps_startup();

    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;

    infile=NULL;
    outfile=NULL;
    informat=FORMAT_PEM;
    outformat=FORMAT_PEM;

    prog=argv[0];
    argc--;
    argv++;
    while (argc >= 1)
        {
        if  (strcmp(*argv,"-inform") == 0)
            {
            if (--argc < 1) goto bad;
            informat=str2fmt(*(++argv));
            }
        else if (strcmp(*argv,"-outform") == 0)
            {
            if (--argc < 1) goto bad;
            outformat=str2fmt(*(++argv));
            }
        else if (strcmp(*argv,"-in") == 0)
            {
            if (--argc < 1) goto bad;
            infile= *(++argv);
            }
        else if (strcmp(*argv,"-out") == 0)
            {
            if (--argc < 1) goto bad;
            outfile= *(++argv);
            }
        else if (strcmp(*argv,"-passin") == 0)
            {
            if (--argc < 1) goto bad;
            passargin= *(++argv);
            }
        else if (strcmp(*argv,"-passout") == 0)
            {
            if (--argc < 1) goto bad;
            passargout= *(++argv);
            }
#ifndef OPENSSL_NO_ENGINE
        else if (strcmp(*argv,"-engine") == 0)
            {
            if (--argc < 1) goto bad;
            engine= *(++argv);
            }
#endif
        else if (strcmp(*argv,"-sgckey") == 0)
            sgckey=1;
        else if (strcmp(*argv,"-pubin") == 0)
            pubin=1;
        else if (strcmp(*argv,"-pubout") == 0)
            pubout=1;
        else if (strcmp(*argv,"-RSAPublicKey_in") == 0)
            pubin = 2;
        else if (strcmp(*argv,"-RSAPublicKey_out") == 0)
            pubout = 2;
        else if (strcmp(*argv,"-pvk-strong") == 0)
            pvk_encr=2;
        else if (strcmp(*argv,"-pvk-weak") == 0)
            pvk_encr=1;
        else if (strcmp(*argv,"-pvk-none") == 0)
            pvk_encr=0;
        else if (strcmp(*argv,"-noout") == 0)
            noout=1;
        else if (strcmp(*argv,"-text") == 0)
            text=1;
        else if (strcmp(*argv,"-modulus") == 0)
            modulus=1;
        else if (strcmp(*argv,"-check") == 0)
            check=1;
        else if ((enc=EVP_get_cipherbyname(&(argv[0][1]))) == NULL)
            {
            BIO_printf(bio_err,"unknown option %s\n",*argv);
            badops=1;
            break;
            }
        argc--;
        argv++;
        }

    if (badops)
        {
bad:
        BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog);
        BIO_printf(bio_err,"where options are\n");
        BIO_printf(bio_err," -inform arg     input format - one of DER NET PEM\n");
        BIO_printf(bio_err," -outform arg    output format - one of DER NET PEM\n");
        BIO_printf(bio_err," -in arg         input file\n");
        BIO_printf(bio_err," -sgckey         Use IIS SGC key format\n");
        BIO_printf(bio_err," -passin arg     input file pass phrase source\n");
        BIO_printf(bio_err," -out arg        output file\n");
        BIO_printf(bio_err," -passout arg    output file pass phrase source\n");
        BIO_printf(bio_err," -des            encrypt PEM output with cbc des\n");
        BIO_printf(bio_err," -des3           encrypt PEM output with ede cbc des using 168 bit key\n");
#ifndef OPENSSL_NO_IDEA
        BIO_printf(bio_err," -idea           encrypt PEM output with cbc idea\n");
#endif
#ifndef OPENSSL_NO_SEED
        BIO_printf(bio_err," -seed           encrypt PEM output with cbc seed\n");
#endif
#ifndef OPENSSL_NO_AES
        BIO_printf(bio_err," -aes128, -aes192, -aes256\n");
        BIO_printf(bio_err,"                 encrypt PEM output with cbc aes\n");
#endif
#ifndef OPENSSL_NO_CAMELLIA
        BIO_printf(bio_err," -camellia128, -camellia192, -camellia256\n");
        BIO_printf(bio_err,"                 encrypt PEM output with cbc camellia\n");
#endif
        BIO_printf(bio_err," -text           print the key in text\n");
        BIO_printf(bio_err," -noout          don't print key out\n");
        BIO_printf(bio_err," -modulus        print the RSA key modulus\n");
        BIO_printf(bio_err," -check          verify key consistency\n");
        BIO_printf(bio_err," -pubin          expect a public key in input file\n");
        BIO_printf(bio_err," -pubout         output a public key\n");
#ifndef OPENSSL_NO_ENGINE
        BIO_printf(bio_err," -engine e       use engine e, possibly a hardware device.\n");
#endif
        goto end;
        }

    ERR_load_crypto_strings();

#ifndef OPENSSL_NO_ENGINE
        e = setup_engine(bio_err, engine, 0);
#endif

    if(!app_passwd(bio_err, passargin, passargout, &passin, &passout)) {
        BIO_printf(bio_err, "Error getting passwords\n");
        goto end;
    }

    if(check && pubin) {
        BIO_printf(bio_err, "Only private keys can be checked\n");
        goto end;
    }

    out=BIO_new(BIO_s_file());

    {
        EVP_PKEY    *pkey;

        if (pubin)
            {
            int tmpformat=-1;
            if (pubin == 2)
                {
                if (informat == FORMAT_PEM)
                    tmpformat = FORMAT_PEMRSA;
                else if (informat == FORMAT_ASN1)
                    tmpformat = FORMAT_ASN1RSA;
                }
            else if (informat == FORMAT_NETSCAPE && sgckey)
                tmpformat = FORMAT_IISSGC;
            else
                tmpformat = informat;
                    
            pkey = load_pubkey(bio_err, infile, tmpformat, 1,
                passin, e, "Public Key");
            }
        else
            pkey = load_key(bio_err, infile,
                (informat == FORMAT_NETSCAPE && sgckey ?
                    FORMAT_IISSGC : informat), 1,
                passin, e, "Private Key");

        if (pkey != NULL)
            rsa = EVP_PKEY_get1_RSA(pkey);
        EVP_PKEY_free(pkey);
    }

    if (rsa == NULL)
        {
        ERR_print_errors(bio_err);
        goto end;
        }

    if (outfile == NULL)
        {
        BIO_set_fp(out,stdout,BIO_NOCLOSE);
#ifdef OPENSSL_SYS_VMS
        {
        BIO *tmpbio = BIO_new(BIO_f_linebuffer());
        out = BIO_push(tmpbio, out);
        }
#endif
        }
    else
        {
        if (BIO_write_filename(out,outfile) <= 0)
            {
            perror(outfile);
            goto end;
            }
        }

    if (text) 
        if (!RSA_print(out,rsa,0))
            {
            perror(outfile);
            ERR_print_errors(bio_err);
            goto end;
            }

    if (modulus)
        {
        BIO_printf(out,"Modulus=");
        BN_print(out,rsa->n);
        BIO_printf(out,"\n");
        }

    if (check)
        {
        int r = RSA_check_key(rsa);

        if (r == 1)
            BIO_printf(out,"RSA key ok\n");
        else if (r == 0)
            {
            unsigned long err;

            while ((err = ERR_peek_error()) != 0 &&
                ERR_GET_LIB(err) == ERR_LIB_RSA &&
                ERR_GET_FUNC(err) == RSA_F_RSA_CHECK_KEY &&
                ERR_GET_REASON(err) != ERR_R_MALLOC_FAILURE)
                {
                BIO_printf(out, "RSA key error: %s\n", ERR_reason_error_string(err));
                ERR_get_error(); /* remove e from error stack */
                }
            }
        
        if (r == -1 || ERR_peek_error() != 0) /* should happen only if r == -1 */
            {
            ERR_print_errors(bio_err);
            goto end;
            }
        }
        
    if (noout)
        {
        ret = 0;
        goto end;
        }
    BIO_printf(bio_err,"writing RSA key\n");
    if  (outformat == FORMAT_ASN1) {
        if(pubout || pubin) 
            {
            if (pubout == 2)
                i=i2d_RSAPublicKey_bio(out,rsa);
            else
                i=i2d_RSA_PUBKEY_bio(out,rsa);
            }
        else i=i2d_RSAPrivateKey_bio(out,rsa);
    }
#ifndef OPENSSL_NO_RC4
    else if (outformat == FORMAT_NETSCAPE)
        {
        unsigned char *p,*pp;
        int size;

        i=1;
        size=i2d_RSA_NET(rsa,NULL,NULL, sgckey);
        if ((p=(unsigned char *)OPENSSL_malloc(size)) == NULL)
            {
            BIO_printf(bio_err,"Memory allocation failure\n");
            goto end;
            }
        pp=p;
        i2d_RSA_NET(rsa,&p,NULL, sgckey);
        BIO_write(out,(char *)pp,size);
        OPENSSL_free(pp);
        }
#endif
    else if (outformat == FORMAT_PEM) {
        if(pubout || pubin)
            {
            if (pubout == 2)
                    i=PEM_write_bio_RSAPublicKey(out,rsa);
            else
                    i=PEM_write_bio_RSA_PUBKEY(out,rsa);
            }
        else i=PEM_write_bio_RSAPrivateKey(out,rsa,
                        enc,NULL,0,NULL,passout);
#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4)
    } else if (outformat == FORMAT_MSBLOB || outformat == FORMAT_PVK) {
        EVP_PKEY *pk;
        pk = EVP_PKEY_new();
        EVP_PKEY_set1_RSA(pk, rsa);
        if (outformat == FORMAT_PVK)
            i = i2b_PVK_bio(out, pk, pvk_encr, 0, passout);
        else if (pubin || pubout)
            i = i2b_PublicKey_bio(out, pk);
        else
            i = i2b_PrivateKey_bio(out, pk);
        EVP_PKEY_free(pk);
#endif
    } else  {
        BIO_printf(bio_err,"bad output format specified for outfile\n");
        goto end;
        }
    if (i <= 0)
        {
        BIO_printf(bio_err,"unable to write key\n");
        ERR_print_errors(bio_err);
        }
    else
        ret=0;
end:
    if(out != NULL) BIO_free_all(out);
    if(rsa != NULL) RSA_free(rsa);
    if(passin) OPENSSL_free(passin);
    if(passout) OPENSSL_free(passout);
    apps_shutdown();
    OPENSSL_EXIT(ret);
    }
#else /* !OPENSSL_NO_RSA */

# if PEDANTIC
static void *dummy=&dummy;
# endif

#endif