| /* |
| * Copyright 2007-2016 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| /* Simple S/MIME signing example */ |
| #include <openssl/pem.h> |
| #include <openssl/pkcs7.h> |
| #include <openssl/err.h> |
| |
| int main(int argc, char **argv) |
| { |
| BIO *in = NULL, *out = NULL, *tbio = NULL; |
| X509 *rcert = NULL; |
| EVP_PKEY *rkey = NULL; |
| PKCS7 *p7 = NULL; |
| int ret = 1; |
| |
| OpenSSL_add_all_algorithms(); |
| ERR_load_crypto_strings(); |
| |
| /* Read in recipient certificate and private key */ |
| tbio = BIO_new_file("signer.pem", "r"); |
| |
| if (!tbio) |
| goto err; |
| |
| rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL); |
| |
| BIO_reset(tbio); |
| |
| rkey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL); |
| |
| if (!rcert || !rkey) |
| goto err; |
| |
| /* Open content being signed */ |
| |
| in = BIO_new_file("smencr.txt", "r"); |
| |
| if (!in) |
| goto err; |
| |
| /* Sign content */ |
| p7 = SMIME_read_PKCS7(in, NULL); |
| |
| if (!p7) |
| goto err; |
| |
| out = BIO_new_file("encrout.txt", "w"); |
| if (!out) |
| goto err; |
| |
| /* Decrypt S/MIME message */ |
| if (!PKCS7_decrypt(p7, rkey, rcert, out, 0)) |
| goto err; |
| |
| ret = 0; |
| |
| err: |
| if (ret) { |
| fprintf(stderr, "Error Signing Data\n"); |
| ERR_print_errors_fp(stderr); |
| } |
| PKCS7_free(p7); |
| X509_free(rcert); |
| EVP_PKEY_free(rkey); |
| BIO_free(in); |
| BIO_free(out); |
| BIO_free(tbio); |
| |
| return ret; |
| |
| } |