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