diff options
Diffstat (limited to 'comm/third_party/botan/src/lib/stream/shake_cipher/shake_cipher.h')
-rw-r--r-- | comm/third_party/botan/src/lib/stream/shake_cipher/shake_cipher.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/stream/shake_cipher/shake_cipher.h b/comm/third_party/botan/src/lib/stream/shake_cipher/shake_cipher.h new file mode 100644 index 0000000000..85eaec2a85 --- /dev/null +++ b/comm/third_party/botan/src/lib/stream/shake_cipher/shake_cipher.h @@ -0,0 +1,57 @@ +/* +* SHAKE-128 as a stream cipher +* (C) 2016 Jack Lloyd +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#ifndef BOTAN_SHAKE128_CIPHER_H_ +#define BOTAN_SHAKE128_CIPHER_H_ + +#include <botan/stream_cipher.h> +#include <botan/secmem.h> + +BOTAN_FUTURE_INTERNAL_HEADER(shake_cipher.h) + +namespace Botan { + +/** +* SHAKE-128 XOF presented as a stream cipher +*/ +class BOTAN_PUBLIC_API(2,0) SHAKE_128_Cipher final : public StreamCipher + { + public: + SHAKE_128_Cipher(); + + /** + * Produce more XOF output + */ + void cipher(const uint8_t in[], uint8_t out[], size_t length) override; + + /** + * Seeking is not supported, this function will throw + */ + void seek(uint64_t offset) override; + + /** + * IV not supported, this function will throw unless iv_len == 0 + */ + void set_iv(const uint8_t iv[], size_t iv_len) override; + + Key_Length_Specification key_spec() const override; + + void clear() override; + std::string name() const override; + StreamCipher* clone() const override; + + private: + void key_schedule(const uint8_t key[], size_t key_len) override; + + secure_vector<uint64_t> m_state; // internal state + secure_vector<uint8_t> m_buffer; // ciphertext buffer + size_t m_buf_pos; // position in m_buffer + }; + +} + +#endif |