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-rw-r--r--src/modes/aead/gcm/gcm.h150
1 files changed, 0 insertions, 150 deletions
diff --git a/src/modes/aead/gcm/gcm.h b/src/modes/aead/gcm/gcm.h
deleted file mode 100644
index 12d66a3d1..000000000
--- a/src/modes/aead/gcm/gcm.h
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@@ -1,150 +0,0 @@
-/*
-* GCM Mode
-* (C) 2013 Jack Lloyd
-*
-* Distributed under the terms of the Botan license
-*/
-
-#ifndef BOTAN_AEAD_GCM_H__
-#define BOTAN_AEAD_GCM_H__
-
-#include <botan/aead.h>
-#include <botan/block_cipher.h>
-#include <botan/stream_cipher.h>
-#include <memory>
-
-namespace Botan {
-
-class GHASH;
-
-/**
-* GCM Mode
-*/
-class BOTAN_DLL GCM_Mode : public AEAD_Mode
- {
- public:
- secure_vector<byte> start(const byte nonce[], size_t nonce_len) override;
-
- void set_associated_data(const byte ad[], size_t ad_len) override;
-
- std::string name() const override;
-
- size_t update_granularity() const;
-
- Key_Length_Specification key_spec() const override;
-
- // GCM supports arbitrary nonce lengths
- bool valid_nonce_length(size_t) const override { return true; }
-
- size_t tag_size() const { return m_tag_size; }
-
- void clear();
- protected:
- void key_schedule(const byte key[], size_t length) override;
-
- GCM_Mode(BlockCipher* cipher, size_t tag_size);
-
- const size_t BS = 16;
-
- const size_t m_tag_size;
- const std::string m_cipher_name;
-
- std::unique_ptr<StreamCipher> m_ctr;
- std::unique_ptr<GHASH> m_ghash;
- };
-
-/**
-* GCM Encryption
-*/
-class BOTAN_DLL GCM_Encryption : public GCM_Mode
- {
- public:
- /**
- * @param cipher the 128 bit block cipher to use
- * @param tag_size is how big the auth tag will be
- */
- GCM_Encryption(BlockCipher* cipher, size_t tag_size = 16) :
- GCM_Mode(cipher, tag_size) {}
-
- size_t output_length(size_t input_length) const override
- { return input_length + tag_size(); }
-
- size_t minimum_final_size() const override { return 0; }
-
- void update(secure_vector<byte>& blocks, size_t offset = 0) override;
-
- void finish(secure_vector<byte>& final_block, size_t offset = 0) override;
- };
-
-/**
-* GCM Decryption
-*/
-class BOTAN_DLL GCM_Decryption : public GCM_Mode
- {
- public:
- /**
- * @param cipher the 128 bit block cipher to use
- * @param tag_size is how big the auth tag will be
- */
- GCM_Decryption(BlockCipher* cipher, size_t tag_size = 16) :
- GCM_Mode(cipher, tag_size) {}
-
- size_t output_length(size_t input_length) const override
- {
- BOTAN_ASSERT(input_length > tag_size(), "Sufficient input");
- return input_length - tag_size();
- }
-
- size_t minimum_final_size() const override { return tag_size(); }
-
- void update(secure_vector<byte>& blocks, size_t offset = 0) override;
-
- void finish(secure_vector<byte>& final_block, size_t offset = 0) override;
- };
-
-/**
-* GCM's GHASH
-* Maybe a Transform?
-*/
-class BOTAN_DLL GHASH : public SymmetricAlgorithm
- {
- public:
- void set_associated_data(const byte ad[], size_t ad_len);
-
- secure_vector<byte> nonce_hash(const byte nonce[], size_t len);
-
- void start(const byte nonce[], size_t len);
-
- /*
- * Assumes input len is multiple of 16
- */
- void update(const byte in[], size_t len);
-
- secure_vector<byte> final();
-
- Key_Length_Specification key_spec() const { return Key_Length_Specification(16); }
-
- void clear();
-
- std::string name() const { return "GHASH"; }
- private:
- void key_schedule(const byte key[], size_t key_len) override;
-
- void gcm_multiply(secure_vector<byte>& x) const;
-
- void ghash_update(secure_vector<byte>& x,
- const byte input[], size_t input_len);
-
- void add_final_block(secure_vector<byte>& x,
- size_t ad_len, size_t pt_len);
-
- secure_vector<byte> m_H;
- secure_vector<byte> m_H_ad;
- secure_vector<byte> m_nonce;
- secure_vector<byte> m_ghash;
- size_t m_ad_len = 0, m_text_len = 0;
- };
-
-}
-
-#endif