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- /*
- * 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;
- }
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