rsautl.c

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/* rsautl.c */
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
 * project 2000.
 */
/* ====================================================================
 * Copyright (c) 2000 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 <openssl/opensslconf.h>
#ifndef OPENSSL_NO_RSA

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

#define RSA_SIGN        1
#define RSA_VERIFY      2
#define RSA_ENCRYPT     3
#define RSA_DECRYPT     4

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

static void usage(void);

#undef PROG

#define PROG rsautl_main

int MAIN(int argc, char **);

int MAIN(int argc, char **argv)
{
        ENGINE *e = NULL;
        BIO *in = NULL, *out = NULL;
        char *infile = NULL, *outfile = NULL;
#ifndef OPENSSL_NO_ENGINE
        char *engine = NULL;
#endif
        char *keyfile = NULL;
        char rsa_mode = RSA_VERIFY, key_type = KEY_PRIVKEY;
        int keyform = FORMAT_PEM;
        char need_priv = 0, badarg = 0, rev = 0;
        char hexdump = 0, asn1parse = 0;
        X509 *x;
        EVP_PKEY *pkey = NULL;
        RSA *rsa = NULL;
        unsigned char *rsa_in = NULL, *rsa_out = NULL, pad;
        char *passargin = NULL, *passin = NULL;
        int rsa_inlen, rsa_outlen = 0;
        int keysize;

        int ret = 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();
        pad = RSA_PKCS1_PADDING;
        
        while(argc >= 1)
        {
                if (!strcmp(*argv,"-in")) {
                        if (--argc < 1) badarg = 1;
                        infile= *(++argv);
                } else if (!strcmp(*argv,"-out")) {
                        if (--argc < 1) badarg = 1;
                        outfile= *(++argv);
                } else if(!strcmp(*argv, "-inkey")) {
                        if (--argc < 1) badarg = 1;
                        keyfile = *(++argv);
                } else if (!strcmp(*argv,"-passin")) {
                        if (--argc < 1) badarg = 1;
                        passargin= *(++argv);
                } else if (strcmp(*argv,"-keyform") == 0) {
                        if (--argc < 1) badarg = 1;
                        keyform=str2fmt(*(++argv));
#ifndef OPENSSL_NO_ENGINE
                } else if(!strcmp(*argv, "-engine")) {
                        if (--argc < 1) badarg = 1;
                        engine = *(++argv);
#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, "-raw")) pad = RSA_NO_PADDING;
                else if(!strcmp(*argv, "-oaep")) pad = RSA_PKCS1_OAEP_PADDING;
                else if(!strcmp(*argv, "-ssl")) pad = RSA_SSLV23_PADDING;
                else if(!strcmp(*argv, "-pkcs")) pad = RSA_PKCS1_PADDING;
                else if(!strcmp(*argv, "-x931")) pad = RSA_X931_PADDING;
                else if(!strcmp(*argv, "-sign")) {
                        rsa_mode = RSA_SIGN;
                        need_priv = 1;
                } else if(!strcmp(*argv, "-verify")) rsa_mode = RSA_VERIFY;
                else if(!strcmp(*argv, "-rev")) rev = 1;
                else if(!strcmp(*argv, "-encrypt")) rsa_mode = RSA_ENCRYPT;
                else if(!strcmp(*argv, "-decrypt")) {
                        rsa_mode = RSA_DECRYPT;
                        need_priv = 1;
                } else badarg = 1;
                if(badarg) {
                        usage();
                        goto end;
                }
                argc--;
                argv++;
        }

        if(need_priv && (key_type != KEY_PRIVKEY)) {
                BIO_printf(bio_err, "A private key is needed for this operation\n");
                goto end;
        }

#ifndef OPENSSL_NO_ENGINE
        e = setup_engine(bio_err, engine, 0);
#endif
        if(!app_passwd(bio_err, passargin, NULL, &passin, NULL)) {
                BIO_printf(bio_err, "Error getting password\n");
                goto end;
        }

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

        if(!pkey) {
                return 1;
        }

        rsa = EVP_PKEY_get1_RSA(pkey);
        EVP_PKEY_free(pkey);

        if(!rsa) {
                BIO_printf(bio_err, "Error getting RSA key\n");
                ERR_print_errors(bio_err);
                goto end;
        }


        if(infile) {
                if(!(in = BIO_new_file(infile, "rb"))) {
                        BIO_printf(bio_err, "Error Reading 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 Reading 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
        }

        keysize = RSA_size(rsa);

        rsa_in = OPENSSL_malloc(keysize * 2);
        rsa_out = OPENSSL_malloc(keysize);

        /* Read the input data */
        rsa_inlen = BIO_read(in, rsa_in, keysize * 2);
        if(rsa_inlen <= 0) {
                BIO_printf(bio_err, "Error reading input Data\n");
                exit(1);
        }
        if(rev) {
                int i;
                unsigned char ctmp;
                for(i = 0; i < rsa_inlen/2; i++) {
                        ctmp = rsa_in[i];
                        rsa_in[i] = rsa_in[rsa_inlen - 1 - i];
                        rsa_in[rsa_inlen - 1 - i] = ctmp;
                }
        }
        switch(rsa_mode) {

                case RSA_VERIFY:
                        rsa_outlen  = RSA_public_decrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
                break;

                case RSA_SIGN:
                        rsa_outlen  = RSA_private_encrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
                break;

                case RSA_ENCRYPT:
                        rsa_outlen  = RSA_public_encrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
                break;

                case RSA_DECRYPT:
                        rsa_outlen  = RSA_private_decrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
                break;

        }

        if(rsa_outlen <= 0) {
                BIO_printf(bio_err, "RSA operation error\n");
                ERR_print_errors(bio_err);
                goto end;
        }
        ret = 0;
        if(asn1parse) {
                if(!ASN1_parse_dump(out, rsa_out, rsa_outlen, 1, -1)) {
                        ERR_print_errors(bio_err);
                }
        } else if(hexdump) BIO_dump(out, (char *)rsa_out, rsa_outlen);
        else BIO_write(out, rsa_out, rsa_outlen);
        end:
        RSA_free(rsa);
        BIO_free(in);
        BIO_free_all(out);
        if(rsa_in) OPENSSL_free(rsa_in);
        if(rsa_out) OPENSSL_free(rsa_out);
        if(passin) OPENSSL_free(passin);
        return ret;
}

static void usage()
{
        BIO_printf(bio_err, "Usage: rsautl [options]\n");
        BIO_printf(bio_err, "-in file        input file\n");
        BIO_printf(bio_err, "-out file       output file\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 an RSA public\n");
        BIO_printf(bio_err, "-certin         input is a certificate carrying an RSA public key\n");
        BIO_printf(bio_err, "-ssl            use SSL v2 padding\n");
        BIO_printf(bio_err, "-raw            use no padding\n");
        BIO_printf(bio_err, "-pkcs           use PKCS#1 v1.5 padding (default)\n");
        BIO_printf(bio_err, "-oaep           use PKCS#1 OAEP\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, "-encrypt        encrypt with public key\n");
        BIO_printf(bio_err, "-decrypt        decrypt with private key\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");
        BIO_printf (bio_err, "-passin arg    pass phrase source\n");
#endif

}

#endif

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