diff options
Diffstat (limited to 'crypto/openssl/apps/smime.c')
| -rw-r--r-- | crypto/openssl/apps/smime.c | 535 |
1 files changed, 535 insertions, 0 deletions
diff --git a/crypto/openssl/apps/smime.c b/crypto/openssl/apps/smime.c new file mode 100644 index 0000000..7dc66d6 --- /dev/null +++ b/crypto/openssl/apps/smime.c @@ -0,0 +1,535 @@ +/* smime.c */ +/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL + * project 1999. + */ +/* ==================================================================== + * Copyright (c) 1999 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). + * + */ + +/* S/MIME utility function */ + +#include <stdio.h> +#include <string.h> +#include "apps.h" +#include <openssl/crypto.h> +#include <openssl/pem.h> +#include <openssl/err.h> + +#undef PROG +#define PROG smime_main +static X509 *load_cert(char *file); +static EVP_PKEY *load_key(char *file, char *pass); +static STACK_OF(X509) *load_certs(char *file); +static X509_STORE *setup_verify(char *CAfile, char *CApath); +static int save_certs(char *signerfile, STACK_OF(X509) *signers); + +#define SMIME_OP 0x10 +#define SMIME_ENCRYPT (1 | SMIME_OP) +#define SMIME_DECRYPT 2 +#define SMIME_SIGN (3 | SMIME_OP) +#define SMIME_VERIFY 4 +#define SMIME_PK7OUT 5 + +int MAIN(int, char **); + +int MAIN(int argc, char **argv) +{ + int operation = 0; + int ret = 0; + char **args; + char *inmode = "r", *outmode = "w"; + char *infile = NULL, *outfile = NULL; + char *signerfile = NULL, *recipfile = NULL; + char *certfile = NULL, *keyfile = NULL; + EVP_CIPHER *cipher = NULL; + PKCS7 *p7 = NULL; + X509_STORE *store = NULL; + X509 *cert = NULL, *recip = NULL, *signer = NULL; + EVP_PKEY *key = NULL; + STACK_OF(X509) *encerts = NULL, *other = NULL; + BIO *in = NULL, *out = NULL, *indata = NULL; + int badarg = 0; + int flags = PKCS7_DETACHED; + char *to = NULL, *from = NULL, *subject = NULL; + char *CAfile = NULL, *CApath = NULL; + char *passargin = NULL, *passin = NULL; + char *inrand = NULL; + int need_rand = 0; + args = argv + 1; + + ret = 1; + + while (!badarg && *args && *args[0] == '-') { + if (!strcmp (*args, "-encrypt")) operation = SMIME_ENCRYPT; + else if (!strcmp (*args, "-decrypt")) operation = SMIME_DECRYPT; + else if (!strcmp (*args, "-sign")) operation = SMIME_SIGN; + else if (!strcmp (*args, "-verify")) operation = SMIME_VERIFY; + else if (!strcmp (*args, "-pk7out")) operation = SMIME_PK7OUT; +#ifndef NO_DES + else if (!strcmp (*args, "-des3")) + cipher = EVP_des_ede3_cbc(); + else if (!strcmp (*args, "-des")) + cipher = EVP_des_cbc(); +#endif +#ifndef NO_RC2 + else if (!strcmp (*args, "-rc2-40")) + cipher = EVP_rc2_40_cbc(); + else if (!strcmp (*args, "-rc2-128")) + cipher = EVP_rc2_cbc(); + else if (!strcmp (*args, "-rc2-64")) + cipher = EVP_rc2_64_cbc(); +#endif + else if (!strcmp (*args, "-text")) + flags |= PKCS7_TEXT; + else if (!strcmp (*args, "-nointern")) + flags |= PKCS7_NOINTERN; + else if (!strcmp (*args, "-noverify")) + flags |= PKCS7_NOVERIFY; + else if (!strcmp (*args, "-nochain")) + flags |= PKCS7_NOCHAIN; + else if (!strcmp (*args, "-nocerts")) + flags |= PKCS7_NOCERTS; + else if (!strcmp (*args, "-noattr")) + flags |= PKCS7_NOATTR; + else if (!strcmp (*args, "-nodetach")) + flags &= ~PKCS7_DETACHED; + else if (!strcmp (*args, "-binary")) + flags |= PKCS7_BINARY; + else if (!strcmp (*args, "-nosigs")) + flags |= PKCS7_NOSIGS; + else if (!strcmp(*args,"-rand")) { + if (args[1]) { + args++; + inrand = *args; + } else badarg = 1; + need_rand = 1; + } else if (!strcmp(*args,"-passin")) { + if (args[1]) { + args++; + passargin = *args; + } else badarg = 1; + } else if (!strcmp (*args, "-to")) { + if (args[1]) { + args++; + to = *args; + } else badarg = 1; + } else if (!strcmp (*args, "-from")) { + if (args[1]) { + args++; + from = *args; + } else badarg = 1; + } else if (!strcmp (*args, "-subject")) { + if (args[1]) { + args++; + subject = *args; + } else badarg = 1; + } else if (!strcmp (*args, "-signer")) { + if (args[1]) { + args++; + signerfile = *args; + } else badarg = 1; + } else if (!strcmp (*args, "-recip")) { + if (args[1]) { + args++; + recipfile = *args; + } else badarg = 1; + } else if (!strcmp (*args, "-inkey")) { + if (args[1]) { + args++; + keyfile = *args; + } else badarg = 1; + } else if (!strcmp (*args, "-certfile")) { + if (args[1]) { + args++; + certfile = *args; + } else badarg = 1; + } else if (!strcmp (*args, "-CAfile")) { + if (args[1]) { + args++; + CAfile = *args; + } else badarg = 1; + } else if (!strcmp (*args, "-CApath")) { + if (args[1]) { + args++; + CApath = *args; + } else badarg = 1; + } else if (!strcmp (*args, "-in")) { + if (args[1]) { + args++; + infile = *args; + } else badarg = 1; + } else if (!strcmp (*args, "-out")) { + if (args[1]) { + args++; + outfile = *args; + } else badarg = 1; + } else badarg = 1; + args++; + } + + if(operation == SMIME_SIGN) { + if(!signerfile) { + BIO_printf(bio_err, "No signer certificate specified\n"); + badarg = 1; + } + need_rand = 1; + } else if(operation == SMIME_DECRYPT) { + if(!recipfile) { + BIO_printf(bio_err, "No recipient certificate and key specified\n"); + badarg = 1; + } + } else if(operation == SMIME_ENCRYPT) { + if(!*args) { + BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n"); + badarg = 1; + } + need_rand = 1; + } else if(!operation) badarg = 1; + + if (badarg) { + BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n"); + BIO_printf (bio_err, "where options are\n"); + BIO_printf (bio_err, "-encrypt encrypt message\n"); + BIO_printf (bio_err, "-decrypt decrypt encrypted message\n"); + BIO_printf (bio_err, "-sign sign message\n"); + BIO_printf (bio_err, "-verify verify signed message\n"); + BIO_printf (bio_err, "-pk7out output PKCS#7 structure\n"); +#ifndef NO_DES + BIO_printf (bio_err, "-des3 encrypt with triple DES\n"); + BIO_printf (bio_err, "-des encrypt with DES\n"); +#endif +#ifndef NO_RC2 + BIO_printf (bio_err, "-rc2-40 encrypt with RC2-40 (default)\n"); + BIO_printf (bio_err, "-rc2-64 encrypt with RC2-64\n"); + BIO_printf (bio_err, "-rc2-128 encrypt with RC2-128\n"); +#endif + BIO_printf (bio_err, "-nointern don't search certificates in message for signer\n"); + BIO_printf (bio_err, "-nosigs don't verify message signature\n"); + BIO_printf (bio_err, "-noverify don't verify signers certificate\n"); + BIO_printf (bio_err, "-nocerts don't include signers certificate when signing\n"); + BIO_printf (bio_err, "-nodetach use opaque signing\n"); + BIO_printf (bio_err, "-noattr don't include any signed attributes\n"); + BIO_printf (bio_err, "-binary don't translate message to text\n"); + BIO_printf (bio_err, "-certfile file other certificates file\n"); + BIO_printf (bio_err, "-signer file signer certificate file\n"); + BIO_printf (bio_err, "-recip file recipient certificate file for decryption\n"); + BIO_printf (bio_err, "-in file input file\n"); + BIO_printf (bio_err, "-inkey file input private key (if not signer or recipient)\n"); + BIO_printf (bio_err, "-out file output file\n"); + BIO_printf (bio_err, "-to addr to address\n"); + BIO_printf (bio_err, "-from ad from address\n"); + BIO_printf (bio_err, "-subject s subject\n"); + BIO_printf (bio_err, "-text include or delete text MIME headers\n"); + BIO_printf (bio_err, "-CApath dir trusted certificates directory\n"); + BIO_printf (bio_err, "-CAfile file trusted certificates file\n"); + BIO_printf(bio_err, "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR); + BIO_printf(bio_err, " load the file (or the files in the directory) into\n"); + BIO_printf(bio_err, " the random number generator\n"); + BIO_printf (bio_err, "cert.pem recipient certificate(s) for encryption\n"); + goto end; + } + + if(!app_passwd(bio_err, passargin, NULL, &passin, NULL)) { + BIO_printf(bio_err, "Error getting password\n"); + goto end; + } + + if (need_rand) { + app_RAND_load_file(NULL, bio_err, (inrand != NULL)); + if (inrand != NULL) + BIO_printf(bio_err,"%ld semi-random bytes loaded\n", + app_RAND_load_files(inrand)); + } + + ret = 2; + + if(operation != SMIME_SIGN) flags &= ~PKCS7_DETACHED; + + if(flags & PKCS7_BINARY) { + if(operation & SMIME_OP) inmode = "rb"; + else outmode = "rb"; + } + + if(operation == SMIME_ENCRYPT) { + if (!cipher) { +#ifndef NO_RC2 + cipher = EVP_rc2_40_cbc(); +#else + BIO_printf(bio_err, "No cipher selected\n"); + goto end; +#endif + } + encerts = sk_X509_new_null(); + while (*args) { + if(!(cert = load_cert(*args))) { + BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args); + goto end; + } + sk_X509_push(encerts, cert); + cert = NULL; + args++; + } + } + + if(signerfile && (operation == SMIME_SIGN)) { + if(!(signer = load_cert(signerfile))) { + BIO_printf(bio_err, "Can't read signer certificate file %s\n", signerfile); + goto end; + } + } + + if(certfile) { + if(!(other = load_certs(certfile))) { + BIO_printf(bio_err, "Can't read certificate file %s\n", certfile); + ERR_print_errors(bio_err); + goto end; + } + } + + if(recipfile && (operation == SMIME_DECRYPT)) { + if(!(recip = load_cert(recipfile))) { + BIO_printf(bio_err, "Can't read recipient certificate file %s\n", recipfile); + ERR_print_errors(bio_err); + goto end; + } + } + + if(operation == SMIME_DECRYPT) { + if(!keyfile) keyfile = recipfile; + } else if(operation == SMIME_SIGN) { + if(!keyfile) keyfile = signerfile; + } else keyfile = NULL; + + if(keyfile) { + if(!(key = load_key(keyfile, passin))) { + BIO_printf(bio_err, "Can't read recipient certificate file %s\n", keyfile); + ERR_print_errors(bio_err); + goto end; + } + } + + if (infile) { + if (!(in = BIO_new_file(infile, inmode))) { + BIO_printf (bio_err, + "Can't open input file %s\n", infile); + goto end; + } + } else in = BIO_new_fp(stdin, BIO_NOCLOSE); + + if (outfile) { + if (!(out = BIO_new_file(outfile, outmode))) { + BIO_printf (bio_err, + "Can't open output file %s\n", outfile); + goto end; + } + } else out = BIO_new_fp(stdout, BIO_NOCLOSE); + + if(operation == SMIME_VERIFY) { + if(!(store = setup_verify(CAfile, CApath))) goto end; + } + + ret = 3; + + if(operation == SMIME_ENCRYPT) { + p7 = PKCS7_encrypt(encerts, in, cipher, flags); + } else if(operation == SMIME_SIGN) { + p7 = PKCS7_sign(signer, key, other, in, flags); + BIO_reset(in); + } else { + if(!(p7 = SMIME_read_PKCS7(in, &indata))) { + BIO_printf(bio_err, "Error reading S/MIME message\n"); + goto end; + } + } + + if(!p7) { + BIO_printf(bio_err, "Error creating PKCS#7 structure\n"); + goto end; + } + + ret = 4; + if(operation == SMIME_DECRYPT) { + if(!PKCS7_decrypt(p7, key, recip, out, flags)) { + BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n"); + goto end; + } + } else if(operation == SMIME_VERIFY) { + STACK_OF(X509) *signers; + if(PKCS7_verify(p7, other, store, indata, out, flags)) { + BIO_printf(bio_err, "Verification Successful\n"); + } else { + BIO_printf(bio_err, "Verification Failure\n"); + goto end; + } + signers = PKCS7_get0_signers(p7, other, flags); + if(!save_certs(signerfile, signers)) { + BIO_printf(bio_err, "Error writing signers to %s\n", + signerfile); + ret = 5; + goto end; + } + sk_X509_free(signers); + } else if(operation == SMIME_PK7OUT) { + PEM_write_bio_PKCS7(out, p7); + } else { + if(to) BIO_printf(out, "To: %s\n", to); + if(from) BIO_printf(out, "From: %s\n", from); + if(subject) BIO_printf(out, "Subject: %s\n", subject); + SMIME_write_PKCS7(out, p7, in, flags); + } + ret = 0; +end: + if (need_rand) + app_RAND_write_file(NULL, bio_err); + if(ret) ERR_print_errors(bio_err); + sk_X509_pop_free(encerts, X509_free); + sk_X509_pop_free(other, X509_free); + X509_STORE_free(store); + X509_free(cert); + X509_free(recip); + X509_free(signer); + EVP_PKEY_free(key); + PKCS7_free(p7); + BIO_free(in); + BIO_free(indata); + BIO_free(out); + if(passin) Free(passin); + return (ret); +} + +static X509 *load_cert(char *file) +{ + BIO *in; + X509 *cert; + if(!(in = BIO_new_file(file, "r"))) return NULL; + cert = PEM_read_bio_X509(in, NULL, NULL,NULL); + BIO_free(in); + return cert; +} + +static EVP_PKEY *load_key(char *file, char *pass) +{ + BIO *in; + EVP_PKEY *key; + if(!(in = BIO_new_file(file, "r"))) return NULL; + key = PEM_read_bio_PrivateKey(in, NULL,NULL,pass); + BIO_free(in); + return key; +} + +static STACK_OF(X509) *load_certs(char *file) +{ + BIO *in; + int i; + STACK_OF(X509) *othercerts; + STACK_OF(X509_INFO) *allcerts; + X509_INFO *xi; + if(!(in = BIO_new_file(file, "r"))) return NULL; + othercerts = sk_X509_new(NULL); + if(!othercerts) return NULL; + allcerts = PEM_X509_INFO_read_bio(in, NULL, NULL, NULL); + for(i = 0; i < sk_X509_INFO_num(allcerts); i++) { + xi = sk_X509_INFO_value (allcerts, i); + if (xi->x509) { + sk_X509_push(othercerts, xi->x509); + xi->x509 = NULL; + } + } + sk_X509_INFO_pop_free(allcerts, X509_INFO_free); + BIO_free(in); + return othercerts; +} + +static X509_STORE *setup_verify(char *CAfile, char *CApath) +{ + X509_STORE *store; + X509_LOOKUP *lookup; + if(!(store = X509_STORE_new())) goto end; + lookup=X509_STORE_add_lookup(store,X509_LOOKUP_file()); + if (lookup == NULL) goto end; + if (CAfile) { + if(!X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM)) { + BIO_printf(bio_err, "Error loading file %s\n", CAfile); + goto end; + } + } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT); + + lookup=X509_STORE_add_lookup(store,X509_LOOKUP_hash_dir()); + if (lookup == NULL) goto end; + if (CApath) { + if(!X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM)) { + BIO_printf(bio_err, "Error loading directory %s\n", CApath); + goto end; + } + } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT); + + ERR_clear_error(); + return store; + end: + X509_STORE_free(store); + return NULL; +} + +static int save_certs(char *signerfile, STACK_OF(X509) *signers) +{ + int i; + BIO *tmp; + if(!signerfile) return 1; + tmp = BIO_new_file(signerfile, "w"); + if(!tmp) return 0; + for(i = 0; i < sk_X509_num(signers); i++) + PEM_write_bio_X509(tmp, sk_X509_value(signers, i)); + BIO_free(tmp); + return 1; +} + |
