A local copy of OpenSSL from GitHub
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* Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
* Licensed under the Apache License 2.0 (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 uncompression 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;
/* Open compressed content */
in = BIO_new_file("smcomp.txt", "r");
if (!in)
goto err;
/* Sign content */
cms = SMIME_read_CMS(in, NULL);
if (!cms)
goto err;
out = BIO_new_file("smuncomp.txt", "w");
if (!out)
goto err;
/* Uncompress S/MIME message */
if (!CMS_uncompress(cms, out, NULL, 0))
goto err;
ret = 0;
if (ret) {
fprintf(stderr, "Error Uncompressing Data\n");
return ret;