1 /* Simple S/MIME verification example */
2 #include <openssl/pem.h>
3 #include <openssl/pkcs7.h>
4 #include <openssl/err.h>
6 int main(int argc, char **argv)
8 BIO *in = NULL, *out = NULL, *tbio = NULL, *cont = NULL;
15 OpenSSL_add_all_algorithms();
16 ERR_load_crypto_strings();
18 /* Set up trusted CA certificate store */
20 st = X509_STORE_new();
22 /* Read in signer certificate and private key */
23 tbio = BIO_new_file("cacert.pem", "r");
28 cacert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
33 if (!X509_STORE_add_cert(st, cacert))
36 /* Open content being signed */
38 in = BIO_new_file("smout.txt", "r");
44 p7 = SMIME_read_PKCS7(in, &cont);
49 /* File to output verified content to */
50 out = BIO_new_file("smver.txt", "w");
54 if (!PKCS7_verify(p7, NULL, st, cont, out, 0))
56 fprintf(stderr, "Verification Failure\n");
60 fprintf(stderr, "Verification Successful\n");
68 fprintf(stderr, "Error Verifying Data\n");
69 ERR_print_errors_fp(stderr);