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[openssl.git] / demos / cms / cms_ver.c
1 /* Simple S/MIME verification example */
2 #include <openssl/pem.h>
3 #include <openssl/cms.h>
4 #include <openssl/err.h>
5
6 int main(int argc, char **argv)
7         {
8         BIO *in = NULL, *out = NULL, *tbio = NULL, *cont = NULL;
9         X509_STORE *st = NULL;
10         X509 *cacert = NULL;
11         CMS_ContentInfo *cms = NULL;
12
13         int ret = 1;
14
15         OpenSSL_add_all_algorithms();
16         ERR_load_crypto_strings();
17
18         /* Set up trusted CA certificate store */
19
20         st = X509_STORE_new();
21
22         /* Read in signer certificate and private key */
23         tbio = BIO_new_file("cacert.pem", "r");
24
25         if (!tbio)
26                 goto err;
27
28         cacert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
29
30         if (!cacert)
31                 goto err;
32
33         if (!X509_STORE_add_cert(st, cacert))
34                 goto err;
35
36         /* Open content being signed */
37
38         in = BIO_new_file("smout.txt", "r");
39
40         if (!in)
41                 goto err;
42
43         /* Sign content */
44         cms = SMIME_read_CMS(in, &cont);
45
46         if (!cms)
47                 goto err;
48
49         /* File to output verified content to */
50         out = BIO_new_file("smver.txt", "w");
51         if (!out)
52                 goto err;
53
54         if (!CMS_verify(cms, NULL, st, cont, out, 0))
55                 {
56                 fprintf(stderr, "Verification Failure\n");
57                 goto err;
58                 }
59
60         fprintf(stderr, "Verification Successful\n");
61
62         ret = 0;
63
64         err:
65
66         if (ret)
67                 {
68                 fprintf(stderr, "Error Verifying Data\n");
69                 ERR_print_errors_fp(stderr);
70                 }
71
72         if (cms)
73                 CMS_ContentInfo_free(cms);
74
75         if (cacert)
76                 X509_free(cacert);
77
78         if (in)
79                 BIO_free(in);
80         if (out)
81                 BIO_free(out);
82         if (tbio)
83                 BIO_free(tbio);
84
85         return ret;
86
87         }