You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
74 lines
1.2 KiB
74 lines
1.2 KiB
/* |
|
* Based on public domain code available at: http://cr.yp.to/snuffle.html |
|
* |
|
* This therefore is public domain. |
|
*/ |
|
|
|
#ifndef _ZT_SALSA20_HPP |
|
#define _ZT_SALSA20_HPP |
|
|
|
#include <stdint.h> |
|
|
|
#include "Constants.hpp" |
|
|
|
namespace ZeroTier { |
|
|
|
/** |
|
* Salsa20/20 stream cipher |
|
*/ |
|
class Salsa20 |
|
{ |
|
public: |
|
Salsa20() throw() {} |
|
|
|
/** |
|
* @param key Key bits |
|
* @param kbits Number of key bits: 128 or 256 (recommended) |
|
* @param iv 64-bit initialization vector |
|
*/ |
|
Salsa20(const void *key,unsigned int kbits,const void *iv) |
|
throw() |
|
{ |
|
init(key,kbits,iv); |
|
} |
|
|
|
/** |
|
* Initialize cipher |
|
* |
|
* @param key Key bits |
|
* @param kbits Number of key bits: 128 or 256 (recommended) |
|
* @param iv 64-bit initialization vector |
|
*/ |
|
void init(const void *key,unsigned int kbits,const void *iv) |
|
throw(); |
|
|
|
/** |
|
* Encrypt data |
|
* |
|
* @param in Input data |
|
* @param out Output buffer |
|
* @param bytes Length of data |
|
*/ |
|
void encrypt(const void *in,void *out,unsigned int bytes) |
|
throw(); |
|
|
|
/** |
|
* Decrypt data |
|
* |
|
* @param in Input data |
|
* @param out Output buffer |
|
* @param bytes Length of data |
|
*/ |
|
inline void decrypt(const void *in,void *out,unsigned int bytes) |
|
throw() |
|
{ |
|
encrypt(in,out,bytes); |
|
} |
|
|
|
private: |
|
uint32_t _state[16]; |
|
}; |
|
|
|
} // namespace ZeroTier |
|
|
|
#endif
|
|
|