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Adam Ierymenko 2025-07-03 11:26:23 -04:00
parent d45f280cb7
commit ba2a4a605c
No known key found for this signature in database
GPG key ID: C8877CF2D7A5D7F3
140 changed files with 19214 additions and 17403 deletions
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81
node/C25519.hpp
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@ -18,20 +18,28 @@
namespace ZeroTier {
#define ZT_C25519_PUBLIC_KEY_LEN 64
#define ZT_C25519_PUBLIC_KEY_LEN 64
#define ZT_C25519_PRIVATE_KEY_LEN 64
#define ZT_C25519_SIGNATURE_LEN 96
#define ZT_C25519_SIGNATURE_LEN 96
/**
* A combined Curve25519 ECDH and Ed25519 signature engine
*/
class C25519
{
public:
struct Public { uint8_t data[ZT_C25519_PUBLIC_KEY_LEN]; };
struct Private { uint8_t data[ZT_C25519_PRIVATE_KEY_LEN]; };
struct Signature { uint8_t data[ZT_C25519_SIGNATURE_LEN]; };
struct Pair { Public pub; Private priv; };
class C25519 {
public:
struct Public {
uint8_t data[ZT_C25519_PUBLIC_KEY_LEN];
};
struct Private {
uint8_t data[ZT_C25519_PRIVATE_KEY_LEN];
};
struct Signature {
uint8_t data[ZT_C25519_SIGNATURE_LEN];
};
struct Pair {
Public pub;
Private priv;
};
/**
* Generate a C25519 elliptic curve key pair
@ -39,7 +47,7 @@ public:
static inline Pair generate()
{
Pair kp;
Utils::getSecureRandom(kp.priv.data,ZT_C25519_PRIVATE_KEY_LEN);
Utils::getSecureRandom(kp.priv.data, ZT_C25519_PRIVATE_KEY_LEN);
_calcPubDH(kp);
_calcPubED(kp);
return kp;
@ -58,18 +66,17 @@ public:
* @return Key pair where cond(kp) returns true
* @tparam F Type of 'cond'
*/
template<typename F>
static inline Pair generateSatisfying(F cond)
template <typename F> static inline Pair generateSatisfying(F cond)
{
Pair kp;
void *const priv = (void *)kp.priv.data;
Utils::getSecureRandom(priv,ZT_C25519_PRIVATE_KEY_LEN);
_calcPubED(kp); // do Ed25519 key -- bytes 32-63 of pub and priv
void* const priv = (void*)kp.priv.data;
Utils::getSecureRandom(priv, ZT_C25519_PRIVATE_KEY_LEN);
_calcPubED(kp); // do Ed25519 key -- bytes 32-63 of pub and priv
do {
++(((uint64_t *)priv)[1]);
--(((uint64_t *)priv)[2]);
_calcPubDH(kp); // keep regenerating bytes 0-31 until satisfied
} while (!cond(kp));
++(((uint64_t*)priv)[1]);
--(((uint64_t*)priv)[2]);
_calcPubDH(kp); // keep regenerating bytes 0-31 until satisfied
} while (! cond(kp));
return kp;
}
@ -84,8 +91,11 @@ public:
* @param keybuf Buffer to fill
* @param keylen Number of key bytes to generate
*/
static void agree(const Private &mine,const Public &their,void *keybuf,unsigned int keylen);
static inline void agree(const Pair &mine,const Public &their,void *keybuf,unsigned int keylen) { agree(mine.priv,their,keybuf,keylen); }
static void agree(const Private& mine, const Public& their, void* keybuf, unsigned int keylen);
static inline void agree(const Pair& mine, const Public& their, void* keybuf, unsigned int keylen)
{
agree(mine.priv, their, keybuf, keylen);
}
/**
* Sign a message with a sender's key pair
@ -106,8 +116,11 @@ public:
* @param len Length of message in bytes
* @param signature Buffer to fill with signature -- MUST be 96 bytes in length
*/
static void sign(const Private &myPrivate,const Public &myPublic,const void *msg,unsigned int len,void *signature);
static inline void sign(const Pair &mine,const void *msg,unsigned int len,void *signature) { sign(mine.priv,mine.pub,msg,len,signature); }
static void sign(const Private& myPrivate, const Public& myPublic, const void* msg, unsigned int len, void* signature);
static inline void sign(const Pair& mine, const void* msg, unsigned int len, void* signature)
{
sign(mine.priv, mine.pub, msg, len, signature);
}
/**
* Sign a message with a sender's key pair
@ -118,16 +131,16 @@ public:
* @param len Length of message in bytes
* @return Signature
*/
static inline Signature sign(const Private &myPrivate,const Public &myPublic,const void *msg,unsigned int len)
static inline Signature sign(const Private& myPrivate, const Public& myPublic, const void* msg, unsigned int len)
{
Signature sig;
sign(myPrivate,myPublic,msg,len,sig.data);
sign(myPrivate, myPublic, msg, len, sig.data);
return sig;
}
static inline Signature sign(const Pair &mine,const void *msg,unsigned int len)
static inline Signature sign(const Pair& mine, const void* msg, unsigned int len)
{
Signature sig;
sign(mine.priv,mine.pub,msg,len,sig.data);
sign(mine.priv, mine.pub, msg, len, sig.data);
return sig;
}
@ -140,7 +153,7 @@ public:
* @param signature 96-byte signature
* @return True if signature is valid and the message is authentic and unmodified
*/
static bool verify(const Public &their,const void *msg,unsigned int len,const void *signature);
static bool verify(const Public& their, const void* msg, unsigned int len, const void* signature);
/**
* Verify a message's signature
@ -151,21 +164,21 @@ public:
* @param signature 96-byte signature
* @return True if signature is valid and the message is authentic and unmodified
*/
static inline bool verify(const Public &their,const void *msg,unsigned int len,const Signature &signature)
static inline bool verify(const Public& their, const void* msg, unsigned int len, const Signature& signature)
{
return verify(their,msg,len,signature.data);
return verify(their, msg, len, signature.data);
}
private:
private:
// derive first 32 bytes of kp.pub from first 32 bytes of kp.priv
// this is the ECDH key
static void _calcPubDH(Pair &kp);
static void _calcPubDH(Pair& kp);
// derive 2nd 32 bytes of kp.pub from 2nd 32 bytes of kp.priv
// this is the Ed25519 sign/verify key
static void _calcPubED(Pair &kp);
static void _calcPubED(Pair& kp);
};
} // namespace ZeroTier
} // namespace ZeroTier
#endif