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AEAD/Chacha20/Poly1305 encrypt multiple buffers

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orignal 2018-11-30 14:41:14 -05:00
parent 0c9ebc36d4
commit e68f1dbc99
5 changed files with 130 additions and 69 deletions
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26
libi2pd/ChaCha20.h
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@ -9,6 +9,8 @@
#define LIBI2PD_CHACHA20_H
#include <cstdint>
#include <cstring>
#include <inttypes.h>
#include <string.h>
#include "Crypto.h"
#if LEGACY_OPENSSL
@ -19,10 +21,32 @@ namespace crypto
const std::size_t CHACHA20_KEY_BYTES = 32;
const std::size_t CHACHA20_NOUNCE_BYTES = 12;
struct Chacha20State
{
Chacha20State () {};
Chacha20State (Chacha20State &&) = delete;
Chacha20State & operator += (const Chacha20State & other)
{
for(int i = 0; i < 16; i++)
data[i] += other.data[i];
return *this;
}
void Copy(const Chacha20State & other)
{
memcpy(data, other.data, sizeof(uint32_t) * 16);
}
uint32_t data[16];
};
void Chacha20Init (Chacha20State& state, const uint8_t * nonce, const uint8_t * key, uint32_t counter);
void Chacha20Encrypt (Chacha20State& state, uint8_t * buf, size_t sz);
/** encrypt buf in place with chacha20 */
void chacha20(uint8_t * buf, size_t sz, const uint8_t * nonce, const uint8_t * key, uint32_t counter=1);
}
}
}
#endif