1 files changed, 87 insertions, 0 deletions
diff --git a/openssl/demos/smime/smver.c b/openssl/demos/smime/smver.c
new file mode 100644
index 000000000..9d360c273
--- /dev/null
+++ b/openssl/demos/smime/smver.c
@@ -0,0 +1,87 @@
+/* Simple S/MIME verification example */
+#include <openssl/pem.h>
+#include <openssl/pkcs7.h>
+#include <openssl/err.h>
+
+int main(int argc, char **argv)
+	{
+	BIO *in = NULL, *out = NULL, *tbio = NULL, *cont = NULL;
+	X509_STORE *st = NULL;
+	X509 *cacert = NULL;
+	PKCS7 *p7 = NULL;
+
+	int ret = 1;
+
+	OpenSSL_add_all_algorithms();
+	ERR_load_crypto_strings();
+
+	/* Set up trusted CA certificate store */
+
+	st = X509_STORE_new();
+
+	/* Read in signer certificate and private key */
+	tbio = BIO_new_file("cacert.pem", "r");
+
+	if (!tbio)
+		goto err;
+
+	cacert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
+
+	if (!cacert)
+		goto err;
+
+	if (!X509_STORE_add_cert(st, cacert))
+		goto err;
+
+	/* Open content being signed */
+
+	in = BIO_new_file("smout.txt", "r");
+
+	if (!in)
+		goto err;
+
+	/* Sign content */
+	p7 = SMIME_read_PKCS7(in, &cont);
+
+	if (!p7)
+		goto err;
+
+	/* File to output verified content to */
+	out = BIO_new_file("smver.txt", "w");
+	if (!out)
+		goto err;
+
+	if (!PKCS7_verify(p7, NULL, st, cont, out, 0))
+		{
+		fprintf(stderr, "Verification Failure\n");
+		goto err;
+		}
+
+	fprintf(stderr, "Verification Successful\n");
+
+	ret = 0;
+
+	err:
+
+	if (ret)
+		{
+		fprintf(stderr, "Error Verifying Data\n");
+		ERR_print_errors_fp(stderr);
+		}
+
+	if (p7)
+		PKCS7_free(p7);
+
+	if (cacert)
+		X509_free(cacert);
+
+	if (in)
+		BIO_free(in);
+	if (out)
+		BIO_free(out);
+	if (tbio)
+		BIO_free(tbio);
+
+	return ret;
+
+	}