From aa4d426b4d3527d7e166df1a05058c9a4a0f6683 Mon Sep 17 00:00:00 2001
From: Wojtek Kosior <wk@koszkonutek-tmp.pl.eu.org>
Date: Fri, 30 Apr 2021 00:33:56 +0200
Subject: initial/final commit

---
 openssl-1.1.0h/demos/cms/cms_denc.c | 97 +++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 openssl-1.1.0h/demos/cms/cms_denc.c

(limited to 'openssl-1.1.0h/demos/cms/cms_denc.c')

diff --git a/openssl-1.1.0h/demos/cms/cms_denc.c b/openssl-1.1.0h/demos/cms/cms_denc.c
new file mode 100644
index 0000000..adba69b
--- /dev/null
+++ b/openssl-1.1.0h/demos/cms/cms_denc.c
@@ -0,0 +1,97 @@
+/*
+ * 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 encrypt 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, *dout = NULL;
+    X509 *rcert = NULL;
+    STACK_OF(X509) *recips = NULL;
+    CMS_ContentInfo *cms = NULL;
+    int ret = 1;
+
+    int flags = CMS_STREAM | CMS_DETACHED;
+
+    OpenSSL_add_all_algorithms();
+    ERR_load_crypto_strings();
+
+    /* Read in recipient certificate */
+    tbio = BIO_new_file("signer.pem", "r");
+
+    if (!tbio)
+        goto err;
+
+    rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
+
+    if (!rcert)
+        goto err;
+
+    /* Create recipient STACK and add recipient cert to it */
+    recips = sk_X509_new_null();
+
+    if (!recips || !sk_X509_push(recips, rcert))
+        goto err;
+
+    /*
+     * sk_X509_pop_free will free up recipient STACK and its contents so set
+     * rcert to NULL so it isn't freed up twice.
+     */
+    rcert = NULL;
+
+    /* Open content being encrypted */
+
+    in = BIO_new_file("encr.txt", "r");
+
+    dout = BIO_new_file("smencr.out", "wb");
+
+    if (!in)
+        goto err;
+
+    /* encrypt content */
+    cms = CMS_encrypt(recips, in, EVP_des_ede3_cbc(), flags);
+
+    if (!cms)
+        goto err;
+
+    out = BIO_new_file("smencr.pem", "w");
+    if (!out)
+        goto err;
+
+    if (!CMS_final(cms, in, dout, flags))
+        goto err;
+
+    /* Write out CMS structure without content */
+    if (!PEM_write_bio_CMS(out, cms))
+        goto err;
+
+    ret = 0;
+
+ err:
+
+    if (ret) {
+        fprintf(stderr, "Error Encrypting Data\n");
+        ERR_print_errors_fp(stderr);
+    }
+
+    CMS_ContentInfo_free(cms);
+    X509_free(rcert);
+    sk_X509_pop_free(recips, X509_free);
+    BIO_free(in);
+    BIO_free(out);
+    BIO_free(dout);
+    BIO_free(tbio);
+    return ret;
+}
-- 
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