560 lines
12 KiB
C
560 lines
12 KiB
C
/*
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* pkcs15-crypt.c: Tool for cryptography operations with SmartCards
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*
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* Copyright (C) 2001 Juha Yrjölä <juha.yrjola@iki.fi>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#ifndef _WIN32
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#include <unistd.h>
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#endif
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <opensc/opensc.h>
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#include <opensc/pkcs15.h>
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#ifdef HAVE_OPENSSL
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#include <openssl/evp.h>
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#include <openssl/rsa.h>
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#include <openssl/dsa.h>
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#endif
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#include "util.h"
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const char *app_name = "pkcs15-crypt";
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int opt_reader = 0, quiet = 0;
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int opt_debug = 0;
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char * opt_pincode = NULL, * opt_key_id = NULL;
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char * opt_input = NULL, * opt_output = NULL;
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int opt_crypt_flags = 0;
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#define OPT_SHA1 0x101
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#define OPT_MD5 0x102
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#define OPT_PKCS1 0x103
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const struct option options[] = {
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{ "sign", 0, 0, 's' },
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{ "decipher", 0, 0, 'c' },
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{ "key", 1, 0, 'k' },
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{ "reader", 1, 0, 'r' },
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{ "input", 1, 0, 'i' },
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{ "output", 1, 0, 'o' },
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{ "sha-1", 0, 0, OPT_SHA1 },
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{ "md5", 0, 0, OPT_MD5 },
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{ "pkcs1", 0, 0, OPT_PKCS1 },
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{ "quiet", 0, 0, 'q' },
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{ "debug", 0, 0, 'd' },
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{ "pin", 1, 0, 'p' },
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{ 0, 0, 0, 0 }
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};
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const char *option_help[] = {
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"Performs digital signature operation",
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"Decipher operation",
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"Selects the private key ID to use",
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"Uses reader number <arg>",
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"Selects the input file to use",
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"Outputs to file <arg>",
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"Input file is a SHA-1 hash",
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"Input file is a MD5 hash",
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"Use PKCS #1 v1.5 padding",
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"Quiet operation",
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"Debug output -- may be supplied several times",
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"Uses password (PIN) <arg>",
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};
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struct sc_context *ctx = NULL;
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struct sc_card *card = NULL;
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struct sc_pkcs15_card *p15card = NULL;
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char * get_pin(struct sc_pkcs15_object *obj)
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{
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char buf[80];
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char *pincode;
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struct sc_pkcs15_pin_info *pinfo = (struct sc_pkcs15_pin_info *) obj->data;
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if (opt_pincode != NULL)
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return strdup(opt_pincode);
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sprintf(buf, "Enter PIN [%s]: ", obj->label);
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while (1) {
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pincode = getpass(buf);
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if (strlen(pincode) == 0)
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return NULL;
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if (strlen(pincode) < pinfo->min_length ||
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strlen(pincode) > pinfo->stored_length)
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continue;
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return pincode;
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}
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}
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int read_input(u8 *buf, int buflen)
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{
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FILE *inf;
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int c;
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inf = fopen(opt_input, "r");
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if (inf == NULL) {
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fprintf(stderr, "Unable to open '%s' for reading.\n", opt_input);
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return -1;
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}
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c = fread(buf, 1, buflen, inf);
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fclose(inf);
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if (c < 0) {
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perror("read");
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return -1;
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}
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return c;
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}
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int write_output(const u8 *buf, int len)
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{
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FILE *outf;
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int output_binary = 1;
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if (opt_output != NULL) {
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outf = fopen(opt_output, "wb");
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if (outf == NULL) {
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fprintf(stderr, "Unable to open '%s' for writing.\n", opt_output);
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return -1;
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}
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} else {
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outf = stdout;
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output_binary = 0;
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}
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if (output_binary == 0)
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print_binary(outf, buf, len);
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else
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fwrite(buf, len, 1, outf);
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if (outf != stdout)
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fclose(outf);
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return 0;
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}
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#ifdef HAVE_OPENSSL
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#define GETBN(bn) ((bn)->len? BN_bin2bn((bn)->data, (bn)->len, NULL) : NULL)
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int extract_key(struct sc_pkcs15_object *obj, EVP_PKEY **pk)
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{
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struct sc_pkcs15_prkey *key;
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const char *pass = NULL;
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int r;
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while (1) {
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r = sc_pkcs15_read_prkey(p15card, obj, pass, &key);
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if (r != SC_ERROR_PASSPHRASE_REQUIRED)
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break;
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if (pass)
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return SC_ERROR_INTERNAL;
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pass = "lalla"; continue;
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pass = getpass("Please enter pass phrase "
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"to unlock secret key: ");
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if (!pass || !*pass)
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break;
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}
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if (r < 0)
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return r;
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*pk = EVP_PKEY_new();
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switch (key->algorithm) {
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case SC_ALGORITHM_RSA:
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{
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RSA *rsa = RSA_new();
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EVP_PKEY_set1_RSA(*pk, rsa);
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rsa->n = GETBN(&key->u.rsa.modulus);
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rsa->e = GETBN(&key->u.rsa.exponent);
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rsa->d = GETBN(&key->u.rsa.d);
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rsa->p = GETBN(&key->u.rsa.p);
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rsa->q = GETBN(&key->u.rsa.q);
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break;
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}
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case SC_ALGORITHM_DSA:
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{
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DSA *dsa = DSA_new();
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EVP_PKEY_set1_DSA(*pk, dsa);
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dsa->priv_key = GETBN(&key->u.dsa.priv);
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break;
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}
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default:
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r = SC_ERROR_NOT_SUPPORTED;
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}
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/* DSA keys need additional parameters from public key file */
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if (obj->type == SC_PKCS15_TYPE_PRKEY_DSA) {
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struct sc_pkcs15_id *id;
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struct sc_pkcs15_object *pub_obj;
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struct sc_pkcs15_pubkey *pub;
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DSA *dsa;
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id = &((struct sc_pkcs15_prkey_info *) obj->data)->id;
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r = sc_pkcs15_find_pubkey_by_id(p15card, id, &pub_obj);
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if (r < 0)
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goto done;
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r = sc_pkcs15_read_pubkey(p15card, pub_obj, &pub);
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if (r < 0)
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goto done;
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dsa = (*pk)->pkey.dsa;
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dsa->pub_key = GETBN(&pub->u.dsa.pub);
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dsa->p = GETBN(&pub->u.dsa.p);
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dsa->q = GETBN(&pub->u.dsa.q);
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dsa->g = GETBN(&pub->u.dsa.g);
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sc_pkcs15_free_pubkey(pub);
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}
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done: if (r < 0)
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EVP_PKEY_free(*pk);
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sc_pkcs15_free_prkey(key);
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return r;
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}
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int sign_ext(struct sc_pkcs15_object *obj,
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u8 *data, size_t len, u8 *out, size_t out_len)
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{
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EVP_PKEY *pkey = NULL;
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int r, nid = -1;
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r = extract_key(obj, &pkey);
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if (r < 0)
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return r;
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switch (obj->type) {
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case SC_PKCS15_TYPE_PRKEY_RSA:
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if (opt_crypt_flags & SC_ALGORITHM_RSA_HASH_MD5) {
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nid = NID_md5;
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} else if (opt_crypt_flags & SC_ALGORITHM_RSA_HASH_SHA1) {
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nid = NID_sha1;
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} else {
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if (len == 16)
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nid = NID_md5;
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else if (len == 20)
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nid = NID_sha1;
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else {
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fprintf(stderr,
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"Invalid input size (%u bytes)\n",
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len);
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return SC_ERROR_INVALID_ARGUMENTS;
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}
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}
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r = RSA_sign(nid, data, len, out, (unsigned int *) &out_len,
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pkey->pkey.rsa);
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if (r <= 0)
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r = SC_ERROR_INTERNAL;
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break;
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case SC_PKCS15_TYPE_PRKEY_DSA:
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r = DSA_sign(NID_sha1, data, len, out, (unsigned int *) &out_len,
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pkey->pkey.dsa);
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if (r <= 0)
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r = SC_ERROR_INTERNAL;
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break;
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}
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if (r >= 0)
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r = out_len;
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EVP_PKEY_free(pkey);
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return r;
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}
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#endif
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int sign(struct sc_pkcs15_object *obj)
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{
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u8 buf[1024], out[1024];
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struct sc_pkcs15_prkey_info *key = (struct sc_pkcs15_prkey_info *) obj->data;
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int r, c, len;
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if (opt_input == NULL) {
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fprintf(stderr, "No input file specified.\n");
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return 2;
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}
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if (opt_output == NULL) {
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fprintf(stderr, "No output file specified.\n");
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return 2;
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}
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c = read_input(buf, sizeof(buf));
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if (c < 0)
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return 2;
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len = sizeof(out);
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if (obj->type == SC_PKCS15_TYPE_PRKEY_RSA
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&& !(opt_crypt_flags & SC_ALGORITHM_RSA_PAD_PKCS1)
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&& c != key->modulus_length/8) {
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fprintf(stderr, "Input has to be exactly %d bytes, when using no padding.\n",
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key->modulus_length/8);
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return 2;
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}
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if (!key->native) {
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#ifdef HAVE_OPENSSL
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r = sign_ext(obj, buf, c, out, len);
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#else
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fprintf(stderr, "Cannot use extractable key because this "
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"program was compiled without crypto "
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"support.\n");
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r = SC_ERROR_NOT_SUPPORTED;
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#endif
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} else {
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r = sc_pkcs15_compute_signature(p15card, obj, opt_crypt_flags,
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buf, c, out, len);
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}
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if (r < 0) {
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fprintf(stderr, "Compute signature failed: %s\n", sc_strerror(r));
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return 1;
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}
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r = write_output(out, r);
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return 0;
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}
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#ifdef HAVE_OPENSSL
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static int decipher_ext(struct sc_pkcs15_object *obj,
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u8 *data, size_t len, u8 *out, size_t out_len)
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{
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EVP_PKEY *pkey = NULL;
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int r;
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r = extract_key(obj, &pkey);
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if (r < 0)
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return r;
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switch (obj->type) {
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case SC_PKCS15_TYPE_PRKEY_RSA:
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r = EVP_PKEY_decrypt(out, data, len, pkey);
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if (r <= 0) {
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fprintf(stderr, "Decryption failed.\n");
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r = SC_ERROR_INTERNAL;
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}
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break;
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default:
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fprintf(stderr, "Key type not supported.\n");
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r = SC_ERROR_NOT_SUPPORTED;
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}
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return r;
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}
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#endif
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int decipher(struct sc_pkcs15_object *obj)
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{
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u8 buf[1024], out[1024];
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int r, c, len;
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if (opt_input == NULL) {
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fprintf(stderr, "No input file specified.\n");
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return 2;
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}
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c = read_input(buf, sizeof(buf));
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if (c < 0)
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return 2;
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len = sizeof(out);
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if (!((struct sc_pkcs15_prkey_info *) obj->data)->native) {
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#ifdef HAVE_OPENSSL
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r = decipher_ext(obj, buf, c, out, len);
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#else
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fprintf(stderr, "Cannot use extractable key because this "
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"program was compiled without crypto "
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"support.\n");
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r = SC_ERROR_NOT_SUPPORTED;
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#endif
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} else {
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r = sc_pkcs15_decipher(p15card, obj,
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opt_crypt_flags & SC_ALGORITHM_RSA_PAD_PKCS1,
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buf, c, out, len);
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}
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if (r < 0) {
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fprintf(stderr, "Decrypt failed: %s\n", sc_strerror(r));
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return 1;
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}
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r = write_output(out, r);
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return 0;
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}
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int main(int argc, char * const argv[])
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{
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int err = 0, r, c, long_optind = 0;
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int do_decipher = 0;
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int do_sign = 0;
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int action_count = 0;
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struct sc_pkcs15_object *key, *pin, *objs[32];
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struct sc_pkcs15_id id;
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char *pincode;
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while (1) {
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c = getopt_long(argc, argv, "sck:r:i:o:qp:d", options, &long_optind);
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if (c == -1)
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break;
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if (c == '?')
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print_usage_and_die();
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switch (c) {
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case 's':
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do_sign++;
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action_count++;
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break;
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case 'c':
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do_decipher++;
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action_count++;
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break;
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case 'k':
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opt_key_id = optarg;
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action_count++;
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break;
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case 'r':
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opt_reader = atoi(optarg);
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break;
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case 'i':
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opt_input = optarg;
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break;
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case 'o':
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opt_output = optarg;
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break;
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case OPT_SHA1:
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opt_crypt_flags |= SC_ALGORITHM_RSA_HASH_SHA1;
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break;
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case OPT_MD5:
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opt_crypt_flags |= SC_ALGORITHM_RSA_HASH_MD5;
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break;
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case OPT_PKCS1:
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opt_crypt_flags |= SC_ALGORITHM_RSA_PAD_PKCS1;
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break;
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case 'q':
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quiet++;
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break;
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case 'd':
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opt_debug++;
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break;
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case 'p':
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opt_pincode = optarg;
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break;
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}
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}
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if (action_count == 0)
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print_usage_and_die();
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r = sc_establish_context(&ctx, app_name);
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if (r) {
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fprintf(stderr, "Failed to establish context: %s\n", sc_strerror(r));
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return 1;
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}
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if (opt_debug)
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ctx->debug = opt_debug;
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if (opt_reader >= ctx->reader_count || opt_reader < 0) {
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fprintf(stderr, "Illegal reader number. Only %d reader(s) configured.\n", ctx->reader_count);
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err = 1;
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goto end;
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}
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if (sc_detect_card_presence(ctx->reader[opt_reader], 0) != 1) {
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fprintf(stderr, "Card not present.\n");
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return 3;
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}
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if (!quiet)
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fprintf(stderr, "Connecting to card in reader %s...\n", ctx->reader[opt_reader]->name);
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r = sc_connect_card(ctx->reader[opt_reader], 0, &card);
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if (r) {
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fprintf(stderr, "Failed to connect to card: %s\n", sc_strerror(r));
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err = 1;
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goto end;
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}
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#if 1
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r = sc_lock(card);
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if (r) {
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fprintf(stderr, "Unable to lock card: %s\n", sc_strerror(r));
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err = 1;
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goto end;
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}
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#endif
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if (!quiet)
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fprintf(stderr, "Trying to find a PKCS #15 compatible card...\n");
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r = sc_pkcs15_bind(card, &p15card);
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if (r) {
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fprintf(stderr, "PKCS #15 initialization failed: %s\n", sc_strerror(r));
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err = 1;
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goto end;
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}
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if (!quiet)
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fprintf(stderr, "Found %s!\n", p15card->label);
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r = sc_pkcs15_get_objects(p15card, SC_PKCS15_TYPE_PRKEY, objs, 32);
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if (r <= 0) {
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if (r == 0)
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r = SC_ERROR_OBJECT_NOT_FOUND;
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fprintf(stderr, "Private key enumeration failed: %s\n", sc_strerror(r));
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err = 1;
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goto end;
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}
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if (opt_key_id != NULL) {
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sc_pkcs15_hex_string_to_id(opt_key_id, &id);
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r = sc_pkcs15_find_prkey_by_id(p15card, &id, &key);
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if (r < 0) {
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fprintf(stderr, "Unable to find private key '%s': %s\n",
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opt_key_id, sc_strerror(r));
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err = 2;
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goto end;
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}
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} else
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key = objs[0];
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if (key->auth_id.len) {
|
|
r = sc_pkcs15_find_pin_by_auth_id(p15card, &key->auth_id, &pin);
|
|
if (r) {
|
|
fprintf(stderr, "Unable to find PIN code for private key: %s\n",
|
|
sc_strerror(r));
|
|
err = 1;
|
|
goto end;
|
|
}
|
|
pincode = get_pin(pin);
|
|
if (pincode == NULL) {
|
|
err = 5;
|
|
goto end;
|
|
}
|
|
r = sc_pkcs15_verify_pin(p15card, (struct sc_pkcs15_pin_info *) pin->data, (const u8 *) pincode, strlen(pincode));
|
|
if (r) {
|
|
fprintf(stderr, "PIN code verification failed: %s\n", sc_strerror(r));
|
|
err = 5;
|
|
goto end;
|
|
}
|
|
free(pincode);
|
|
if (!quiet)
|
|
fprintf(stderr, "PIN code correct.\n");
|
|
}
|
|
if (do_decipher) {
|
|
if ((err = decipher(key)))
|
|
goto end;
|
|
action_count--;
|
|
}
|
|
if (do_sign) {
|
|
if ((err = sign(key)))
|
|
goto end;
|
|
action_count--;
|
|
}
|
|
end:
|
|
if (p15card)
|
|
sc_pkcs15_unbind(p15card);
|
|
if (card) {
|
|
#if 1
|
|
sc_unlock(card);
|
|
#endif
|
|
sc_disconnect_card(card, 0);
|
|
}
|
|
if (ctx)
|
|
sc_release_context(ctx);
|
|
return err;
|
|
}
|