:-'Generic Commit'

dropshell-tool/openssl-1.1.1w/demos/cms/cms_comp.c

@@ -0,0 +1,64 @@
+/*
+ * 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
+ */
+
+/* Simple S/MIME compress example */
+#include <openssl/pem.h>
+#include <openssl/cms.h>
+#include <openssl/err.h>
+
+int main(int argc, char **argv)
+{
+    BIO *in = NULL, *out = NULL;
+    CMS_ContentInfo *cms = NULL;
+    int ret = 1;
+
+    /*
+     * On OpenSSL 1.0.0+ only:
+     * for streaming set CMS_STREAM
+     */
+    int flags = CMS_STREAM;
+
+    OpenSSL_add_all_algorithms();
+    ERR_load_crypto_strings();
+
+    /* Open content being compressed */
+
+    in = BIO_new_file("comp.txt", "r");
+
+    if (!in)
+        goto err;
+
+    /* compress content */
+    cms = CMS_compress(in, NID_zlib_compression, flags);
+
+    if (!cms)
+        goto err;
+
+    out = BIO_new_file("smcomp.txt", "w");
+    if (!out)
+        goto err;
+
+    /* Write out S/MIME message */
+    if (!SMIME_write_CMS(out, cms, in, flags))
+        goto err;
+
+    ret = 0;
+
+ err:
+
+    if (ret) {
+        fprintf(stderr, "Error Compressing Data\n");
+        ERR_print_errors_fp(stderr);
+    }
+
+    CMS_ContentInfo_free(cms);
+    BIO_free(in);
+    BIO_free(out);
+    return ret;
+}