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Precalculate keys and destroy in-memory ephemeral key copies ASAP.

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This commit is contained in:
Ian Gulliver
2015-02-08 22:36:23 +00:00
parent f35f9d8885
commit ac97f35e3c
2 changed files with 57 additions and 12 deletions
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16
crypto.h
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@@ -20,8 +20,10 @@ class CryptoKey {
unsigned char* MutableKey();
void MarkSet();
void Clear();
protected:
unsigned char* const key_;
unsigned char* key_;
bool is_set_;
const size_t key_bytes_;
};
@@ -45,14 +47,20 @@ class PublicKey : public CryptoKey {
void FromString(const std::string& str);
};
class PrecalcKey : public CryptoKey {
public:
PrecalcKey();
};
class CryptoUtil {
public:
static void GenKey(SharedKey* key);
static void GenKeyPair(SecretKey* secret_key, PublicKey* public_key);
static void DerivePublicKey(const SecretKey& secret_key, PublicKey* public_key);
static void PrecalculateKey(const SecretKey& secret_key, const PublicKey& public_key, PrecalcKey* precalc_key);
static std::unique_ptr<TLVNode> EncodeEncrypt(const SecretKey& secret_key, const PublicKey& public_key, const TLVNode& input);
static std::unique_ptr<TLVNode> DecryptDecode(const SecretKey& secret_key, const PublicKey& public_key, const TLVNode& input);
static std::unique_ptr<TLVNode> EncodeEncrypt(const PrecalcKey& precalc_key, const TLVNode& input);
static std::unique_ptr<TLVNode> DecryptDecode(const PrecalcKey& precalc_key, const TLVNode& input);
};
class CryptoBase {
@@ -91,9 +99,11 @@ class CryptoPubConnBase : public CryptoBase {
const SecretKey& secret_key_;
PublicKey public_key_;
PublicKey peer_public_key_;
PrecalcKey precalc_key_;
SecretKey ephemeral_secret_key_;
PublicKey peer_ephemeral_public_key_;
PrecalcKey ephemeral_precalc_key_;
};
class CryptoPubServerConnection;