61 lines
957 B
C
61 lines
957 B
C
/* 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 0.9.9 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);
|
|
}
|
|
|
|
if (cms)
|
|
CMS_ContentInfo_free(cms);
|
|
if (in)
|
|
BIO_free(in);
|
|
if (out)
|
|
BIO_free(out);
|
|
|
|
return ret;
|
|
|
|
}
|