1 files changed, 88 insertions, 0 deletions
diff --git a/openssl-1.1.0h/demos/cms/cms_ddec.c b/openssl-1.1.0h/demos/cms/cms_ddec.c
new file mode 100644
index 0000000..8f2e9ae
--- /dev/null
+++ b/openssl-1.1.0h/demos/cms/cms_ddec.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+/*
+ * S/MIME detached data decrypt example: rarely done but should the need
+ * arise this is an 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, *dcont = 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 PEM file containing enveloped data */
+
+    in = BIO_new_file("smencr.pem", "r");
+
+    if (!in)
+        goto err;
+
+    /* Parse PEM content */
+    cms = PEM_read_bio_CMS(in, NULL, 0, NULL);
+
+    if (!cms)
+        goto err;
+
+    /* Open file containing detached content */
+    dcont = BIO_new_file("smencr.out", "rb");
+
+    if (!in)
+        goto err;
+
+    out = BIO_new_file("encrout.txt", "w");
+    if (!out)
+        goto err;
+
+    /* Decrypt S/MIME message */
+    if (!CMS_decrypt(cms, rkey, rcert, dcont, out, 0))
+        goto err;
+
+    ret = 0;
+
+ err:
+
+    if (ret) {
+        fprintf(stderr, "Error Decrypting Data\n");
+        ERR_print_errors_fp(stderr);
+    }
+
+    CMS_ContentInfo_free(cms);
+    X509_free(rcert);
+    EVP_PKEY_free(rkey);
+    BIO_free(in);
+    BIO_free(out);
+    BIO_free(tbio);
+    BIO_free(dcont);
+    return ret;
+}