1 files changed, 79 insertions, 0 deletions

diff --git a/src/lib/libssl/src/demos/cms/cms_dec.c b/src/lib/libssl/src/demos/cms/cms_dec.c
new file mode 100644
index 0000000000..7ddf653269
--- /dev/null
+++ b/src/lib/libssl/src/demos/cms/cms_dec.c
@@ -0,0 +1,79 @@
+/* Simple S/MIME decryption example */
+#include <openssl/pem.h>
+#include <openssl/cms.h>
+#include <openssl/err.h>
+
+int main(int argc, char **argv)
+        {
+        BIO *in = NULL, *out = NULL, *tbio = NULL;
+        X509 *rcert = NULL;
+        EVP_PKEY *rkey = NULL;
+        CMS_ContentInfo *cms = NULL;
+        int ret = 1;
+
+        OpenSSL_add_all_algorithms();
+        ERR_load_crypto_strings();
+
+        /* Read in recipient certificate and private key */
+        tbio = BIO_new_file("signer.pem", "r");
+
+        if (!tbio)
+                goto err;
+
+        rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
+
+        BIO_reset(tbio);
+
+        rkey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
+
+        if (!rcert || !rkey)
+                goto err;
+
+        /* Open S/MIME message to decrypt */
+
+        in = BIO_new_file("smencr.txt", "r");
+
+        if (!in)
+                goto err;
+
+        /* Parse message */
+        cms = SMIME_read_CMS(in, NULL);
+
+        if (!cms)
+                goto err;
+
+        out = BIO_new_file("decout.txt", "w");
+        if (!out)
+                goto err;
+
+        /* Decrypt S/MIME message */
+        if (!CMS_decrypt(cms, rkey, rcert, out, NULL, 0))
+                goto err;
+
+        ret = 0;
+
+        err:
+
+        if (ret)
+                {
+                fprintf(stderr, "Error Decrypting Data\n");
+                ERR_print_errors_fp(stderr);
+                }
+
+        if (cms)
+                CMS_ContentInfo_free(cms);
+        if (rcert)
+                X509_free(rcert);
+        if (rkey)
+                EVP_PKEY_free(rkey);
+
+        if (in)
+                BIO_free(in);
+        if (out)
+                BIO_free(out);
+        if (tbio)
+                BIO_free(tbio);
+
+        return ret;
+
+        }