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/*
* OpenSSL RC4
* (C) 1999-2007,2015 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/internal/algo_registry.h>
#include <botan/internal/openssl.h>
#include <botan/parsing.h>
#include <openssl/rc4.h>
namespace Botan {
namespace {
class OpenSSL_RC4 : public StreamCipher
{
public:
void clear() { clear_mem(&m_rc4, 1); }
std::string name() const { return "RC4"; }
StreamCipher* clone() const { return new OpenSSL_RC4; }
Key_Length_Specification key_spec() const
{
return Key_Length_Specification(1, 32);
}
OpenSSL_RC4(size_t skip = 0) : m_skip(skip) { clear(); }
~OpenSSL_RC4() { clear(); }
private:
void cipher(const byte in[], byte out[], size_t length)
{
::RC4(&m_rc4, length, in, out);
}
void key_schedule(const byte key[], size_t length)
{
::RC4_set_key(&m_rc4, length, key);
byte d = 0;
for(size_t i = 0; i != m_skip; ++i)
::RC4(&m_rc4, 1, &d, &d);
}
size_t m_skip;
RC4_KEY m_rc4;
};
}
BOTAN_REGISTER_TYPE(StreamCipher, OpenSSL_RC4, "RC4", (make_new_T_1len<OpenSSL_RC4,0>),
"openssl", BOTAN_OPENSSL_RC4_PRIO);
}
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