Hi,
has anyone of you ever tried to link C++ stream with OpenSSL BIO ? What I mean is:
1. there is an istream object on input with PKCS#7 data to verify with PKCS7_verify function
2. Let's assume this stream has it's source in file and I do not want to read whole data into memory before calling PKCS7_verify function because it's likely large file.
Example class could look like this (obvious parts omitted :-) ):
//constructor
OpenSSLCService::OpenSSLCService()
{
OPENSSL_add_all_algorithms_noconf();
}
//destructor
OpenSSLCService::~OpenSSLCService()
{
EVP_cleanup();
CRYPTO_cleanup_all_ex_data();
ERR_remove_state(0);
}
bool OpenSSLCService::verifyPKCS7(istream & indata)
{
X509_STORE *store = X509_STORE_new();
int flags = PKCS7_NOVERIFY;
/* How to avoid reading whole data into memory here... */
ostrstream tmp;
dane >> tmp.rdbuf();
int size = tmp.pcount();
BIO * in = BIO_new_mem_buf( (void *)tmp.str(), size );
/* ... to here */
BIO * out = BIO_new(BIO_s_mem());
PKCS7 * p7 = d2i_PKCS7_bio(in, NULL);
bool ret = PKCS7_verify(p7, NULL, store, NULL, out, flags);
PKCS7_free(p7);
BIO_free(in);
BIO_free(out);
X509_STORE_free(store);
tmp.freeze(0);
return ret;
}
Thank you in advance for any help
Regards
Andrzej
