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83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
#ifndef __GRADIDO_LOGIN_SERVER_CRYPTO_ED25519_H
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#define __GRADIDO_LOGIN_SERVER_CRYPTO_ED25519_H
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#include "IKeyPair.h"
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/*!
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* \author: Dario Rekowski
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*
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* \date: 2020-06-04
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*
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* \brief: Key Pairs class for ed25519 keys, used for default gradido transactions
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*/
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#include "sodium.h"
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#include "AuthenticatedEncryption.h"
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class Passphrase;
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class KeyPairEd25519 : public IKeyPair
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{
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public:
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//! \param privateKey: take ownership, release after object destruction
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//! \param publicKey: copy
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KeyPairEd25519(MemoryBin* privateKey);
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KeyPairEd25519(const unsigned char* publicKey);
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~KeyPairEd25519();
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//! \param passphrase must contain word indices
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//! \return create KeyPairEd25519, caller muss call delete at return after finish
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static KeyPairEd25519* create(const Poco::AutoPtr<Passphrase> passphrase);
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//! \return caller take ownership of return value
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MemoryBin* sign(const MemoryBin* message) const;
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inline const unsigned char* getPublicKey() const { return mSodiumPublic; }
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inline bool isTheSame(const KeyPairEd25519& b) const {
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return 0 == sodium_memcmp(mSodiumPublic, b.mSodiumPublic, crypto_sign_PUBLICKEYBYTES);
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}
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inline bool isTheSame(const unsigned char* pubkey) const {
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return 0 == sodium_memcmp(mSodiumPublic, pubkey, crypto_sign_PUBLICKEYBYTES);
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}
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//! \return 0 if the same
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//! \return -1 if not the same
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//! \return 1 if hasn't private key
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inline int isTheSame(const MemoryBin* privkey) const {
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if (!mSodiumSecret) return 1;
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if (privkey->size() != mSodiumSecret->size()) return -1;
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return sodium_memcmp(*mSodiumSecret, *privkey, privkey->size());
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}
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inline bool operator == (const KeyPairEd25519& b) const { return isTheSame(b); }
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inline bool operator != (const KeyPairEd25519& b) const { return !isTheSame(b); }
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inline bool operator == (const unsigned char* b) const { return isTheSame(b); }
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inline bool operator != (const unsigned char* b) const { return !isTheSame(b); }
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inline bool hasPrivateKey() const { return mSodiumSecret != nullptr; }
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//! \brief only way to get a private key.. encrypted
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MemoryBin* getCryptedPrivKey(const Poco::AutoPtr<AuthenticatedEncryption> password) const;
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protected:
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KeyPairEd25519();
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private:
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// 64 Byte
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//! \brief ed25519 libsodium private key
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//!
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//! Why it is a pointer and the public is an array?
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//! TODO: replace MemoryBin by a memory obfuscation class which make it hard to steal the private key from memory
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MemoryBin* mSodiumSecret;
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// 32 Byte
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//! \brief ed25519 libsodium public key
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unsigned char mSodiumPublic[crypto_sign_PUBLICKEYBYTES];
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};
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#endif //__GRADIDO_LOGIN_SERVER_CRYPTO_ED25519_H
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