1/* 2 * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10/* S/MIME signing example: 2 signers */ 11#include <openssl/pem.h> 12#include <openssl/cms.h> 13#include <openssl/err.h> 14 15int main(int argc, char **argv) 16{ 17 BIO *in = NULL, *out = NULL, *tbio = NULL; 18 X509 *scert = NULL, *scert2 = NULL; 19 EVP_PKEY *skey = NULL, *skey2 = NULL; 20 CMS_ContentInfo *cms = NULL; 21 int ret = 1; 22 23 OpenSSL_add_all_algorithms(); 24 ERR_load_crypto_strings(); 25 26 tbio = BIO_new_file("signer.pem", "r"); 27 28 if (!tbio) 29 goto err; 30 31 scert = PEM_read_bio_X509(tbio, NULL, 0, NULL); 32 33 BIO_reset(tbio); 34 35 skey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL); 36 37 BIO_free(tbio); 38 39 tbio = BIO_new_file("signer2.pem", "r"); 40 41 if (!tbio) 42 goto err; 43 44 scert2 = PEM_read_bio_X509(tbio, NULL, 0, NULL); 45 46 BIO_reset(tbio); 47 48 skey2 = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL); 49 50 if (!scert2 || !skey2) 51 goto err; 52 53 in = BIO_new_file("sign.txt", "r"); 54 55 if (!in) 56 goto err; 57 58 cms = CMS_sign(NULL, NULL, NULL, in, CMS_STREAM | CMS_PARTIAL); 59 60 if (!cms) 61 goto err; 62 63 /* Add each signer in turn */ 64 65 if (!CMS_add1_signer(cms, scert, skey, NULL, 0)) 66 goto err; 67 68 if (!CMS_add1_signer(cms, scert2, skey2, NULL, 0)) 69 goto err; 70 71 out = BIO_new_file("smout.txt", "w"); 72 if (!out) 73 goto err; 74 75 /* NB: content included and finalized by SMIME_write_CMS */ 76 77 if (!SMIME_write_CMS(out, cms, in, CMS_STREAM)) 78 goto err; 79 80 ret = 0; 81 82 err: 83 84 if (ret) { 85 fprintf(stderr, "Error Signing Data\n"); 86 ERR_print_errors_fp(stderr); 87 } 88 89 CMS_ContentInfo_free(cms); 90 X509_free(scert); 91 EVP_PKEY_free(skey); 92 X509_free(scert2); 93 EVP_PKEY_free(skey2); 94 BIO_free(in); 95 BIO_free(out); 96 BIO_free(tbio); 97 return ret; 98} 99