NativeSecp256k1

This class holds native methods to handle ECDSA verification.

You can find an example library that can be used for this at https://github.com/bitcoin/secp256k1

To build secp256k1 for use with bitcoinj, run ./configure --enable-jni --enable-experimental --enable-module-ecdh and make then copy .libs/libsecp256k1.so to your system library path or point the JVM to the folder containing it with -Djava.library.path

@safe

class NativeSecp256k1 {

enum TWEAK_SIZE;

enum SIGNATURE_SIZE;

enum SECKEY_SIZE;

enum XONLY_PUBKEY_SIZE;

enum PUBKEY_SIZE;

enum MESSAGE_SIZE;

enum KEYPAIR_SIZE;

protected

secp256k1_context* _ctx;

~this();

void privTweak(const(ubyte[]) keypair, const(ubyte[]) tweak, ubyte[] tweakked_keypair);

immutable(ubyte[]) createECDHSecret(const(ubyte[]) seckey, const(ubyte[]) pubkey);

bool randomizeContext(const(ubyte)[] seed);

immutable(ubyte[]) getPubkey(const(ubyte[]) keypair_seckey);

immutable(ubyte[]) sign(const(ubyte[]) msg, const(ubyte[]) keypair, const(ubyte[]) aux_random);

immutable(ubyte[]) sign(const(ubyte[]) msg, const(ubyte[]) keypair);

bool verify(const(ubyte[]) msg, const(ubyte[]) signature, const(ubyte[]) pubkey);

}

Destructor

~this ~this(): libsecp256k1 Cleanup - This destroys the secp256k1 context object This should be called at the end of the program for proper cleanup of the context.

Members

Functions

createECDHSecret immutable(ubyte[]) createECDHSecret(const(ubyte[]) seckey, const(ubyte[]) pubkey): libsecp256k1 create ECDH secret - constant time ECDH calculation
getPubkey immutable(ubyte[]) getPubkey(const(ubyte[]) keypair_seckey): Takes both a seckey and keypair
privTweak void privTweak(const(ubyte[]) keypair, const(ubyte[]) tweak, ubyte[] tweakked_keypair): libsecp256k1 PubKey Tweak-Mul - Tweak pubkey by multiplying to it
randomizeContext bool randomizeContext(const(ubyte)[] seed): Updates the context randomization
sign immutable(ubyte[]) sign(const(ubyte[]) msg, const(ubyte[]) keypair, const(ubyte[]) aux_random)
immutable(ubyte[]) sign(const(ubyte[]) msg, const(ubyte[]) keypair): Create a Schnorr signature.
verify bool verify(const(ubyte[]) msg, const(ubyte[]) signature, const(ubyte[]) pubkey): Verifies a Schnorr signature

tagion crypto secp256k1 NativeSecp256k1 classes

NativeSecp256k1