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9e200689 RS |
1 | /* |
2 | * Copyright 2007-2016 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * | |
4 | * Licensed under the OpenSSL license (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 | ||
b2b2dafc DSH |
10 | /* Simple S/MIME signing example */ |
11 | #include <openssl/pem.h> | |
12 | #include <openssl/pkcs7.h> | |
13 | #include <openssl/err.h> | |
14 | ||
15 | int main(int argc, char **argv) | |
0f113f3e MC |
16 | { |
17 | BIO *in = NULL, *out = NULL, *tbio = NULL; | |
18 | X509 *scert = NULL; | |
19 | EVP_PKEY *skey = NULL; | |
20 | PKCS7 *p7 = NULL; | |
21 | int ret = 1; | |
b2b2dafc | 22 | |
0f113f3e MC |
23 | /* |
24 | * For simple S/MIME signing use PKCS7_DETACHED. On OpenSSL 0.9.9 only: | |
25 | * for streaming detached set PKCS7_DETACHED|PKCS7_STREAM for streaming | |
26 | * non-detached set PKCS7_STREAM | |
27 | */ | |
28 | int flags = PKCS7_DETACHED | PKCS7_STREAM; | |
b2b2dafc | 29 | |
0f113f3e MC |
30 | OpenSSL_add_all_algorithms(); |
31 | ERR_load_crypto_strings(); | |
b2b2dafc | 32 | |
0f113f3e MC |
33 | /* Read in signer certificate and private key */ |
34 | tbio = BIO_new_file("signer.pem", "r"); | |
b2b2dafc | 35 | |
0f113f3e MC |
36 | if (!tbio) |
37 | goto err; | |
b2b2dafc | 38 | |
0f113f3e | 39 | scert = PEM_read_bio_X509(tbio, NULL, 0, NULL); |
b2b2dafc | 40 | |
0f113f3e | 41 | BIO_reset(tbio); |
b2b2dafc | 42 | |
0f113f3e | 43 | skey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL); |
b2b2dafc | 44 | |
0f113f3e MC |
45 | if (!scert || !skey) |
46 | goto err; | |
b2b2dafc | 47 | |
0f113f3e | 48 | /* Open content being signed */ |
b2b2dafc | 49 | |
0f113f3e | 50 | in = BIO_new_file("sign.txt", "r"); |
b2b2dafc | 51 | |
0f113f3e MC |
52 | if (!in) |
53 | goto err; | |
b2b2dafc | 54 | |
0f113f3e MC |
55 | /* Sign content */ |
56 | p7 = PKCS7_sign(scert, skey, NULL, in, flags); | |
b2b2dafc | 57 | |
0f113f3e MC |
58 | if (!p7) |
59 | goto err; | |
b2b2dafc | 60 | |
0f113f3e MC |
61 | out = BIO_new_file("smout.txt", "w"); |
62 | if (!out) | |
63 | goto err; | |
b2b2dafc | 64 | |
0f113f3e MC |
65 | if (!(flags & PKCS7_STREAM)) |
66 | BIO_reset(in); | |
b2b2dafc | 67 | |
0f113f3e MC |
68 | /* Write out S/MIME message */ |
69 | if (!SMIME_write_PKCS7(out, p7, in, flags)) | |
70 | goto err; | |
b2b2dafc | 71 | |
0f113f3e | 72 | ret = 0; |
b2b2dafc | 73 | |
0f113f3e | 74 | err: |
0f113f3e MC |
75 | if (ret) { |
76 | fprintf(stderr, "Error Signing Data\n"); | |
77 | ERR_print_errors_fp(stderr); | |
78 | } | |
e0e920b1 | 79 | PKCS7_free(p7); |
222561fe | 80 | X509_free(scert); |
c5ba2d99 | 81 | EVP_PKEY_free(skey); |
ca3a82c3 RS |
82 | BIO_free(in); |
83 | BIO_free(out); | |
84 | BIO_free(tbio); | |
b2b2dafc | 85 | |
0f113f3e | 86 | return ret; |
b2b2dafc | 87 | |
0f113f3e | 88 | } |