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;

static void check(bool flag, ConsensusFailCode code, string file, size_t line);

enum KEYPAIR_SIZE;

protected

secp256k1_context* _ctx;

this(SECP256K1 flag);

~this();

secp256k1_context* cloneContext();

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

immutable(ubyte[]) pubTweak(const(ubyte[]) pubkey, const(ubyte[]) tweak);

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

bool randomizeContext();

void createKeyPair(const(ubyte[]) seckey, secp256k1_keypair keypair);

void createKeyPair(const(ubyte[]) seckey, ubyte[] keypair);

void getSecretKey(const(ubyte[]) keypair, ubyte[] seckey);

void getPubkey(const(secp256k1_keypair) keypair, secp256k1_pubkey pubkey);

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

immutable(ubyte[]) getPubkey(const(secp256k1_keypair) keypair);

immutable(ubyte[]) sign(const(ubyte[]) msg, const(secp256k1_keypair) keypair, const(ubyte[]) aux_random);

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);

bool verify(const(ubyte[]) signature, const(ubyte[]) msg, const(secp256k1_pubkey) pubkey);

}

Constructors

this this(SECP256K1 flag): Undocumented in source.

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

cloneContext secp256k1_context* cloneContext(): Undocumented in source. Be warned that the author may not have intended to support it.
createECDHSecret immutable(ubyte[]) createECDHSecret(const(ubyte[]) seckey, const(ubyte[]) pubkey): libsecp256k1 create ECDH secret - constant time ECDH calculation
createKeyPair void createKeyPair(const(ubyte[]) seckey, secp256k1_keypair keypair): Undocumented in source.
createKeyPair void createKeyPair(const(ubyte[]) seckey, ubyte[] keypair): Undocumented in source.
getPubkey void getPubkey(const(secp256k1_keypair) keypair, secp256k1_pubkey pubkey): Undocumented in source. Be warned that the author may not have intended to support it.
getPubkey immutable(ubyte[]) getPubkey(const(ubyte[]) keypair_seckey): Takes both a seckey and keypair
getPubkey immutable(ubyte[]) getPubkey(const(secp256k1_keypair) keypair): Undocumented in source. Be warned that the author may not have intended to support it.
getSecretKey void getSecretKey(const(ubyte[]) keypair, ubyte[] seckey): Undocumented in source.
privTweak void privTweak(const(ubyte[]) keypair, const(ubyte[]) tweak, ubyte[] tweakked_keypair): libsecp256k1 PubKey Tweak-Mul - Tweak pubkey by multiplying to it
pubTweak immutable(ubyte[]) pubTweak(const(ubyte[]) pubkey, const(ubyte[]) tweak): Undocumented in source.
randomizeContext bool randomizeContext(): libsecp256k1 randomize - updates the context randomization
sign immutable(ubyte[]) sign(const(ubyte[]) msg, const(secp256k1_keypair) keypair, const(ubyte[]) aux_random): libsecp256k1 Create an Schnorr signature.
sign immutable(ubyte[]) sign(const(ubyte[]) msg, const(ubyte[]) keypair, const(ubyte[]) aux_random): Undocumented in source.
sign immutable(ubyte[]) sign(const(ubyte[]) msg, const(ubyte[]) keypair): Undocumented in source. Be warned that the author may not have intended to support it.
verify bool verify(const(ubyte[]) msg, const(ubyte[]) signature, const(ubyte[]) pubkey): Verifies the given secp256k1 signature in native code. Calling when enabled == false is undefined (probably library not loaded)
verify bool verify(const(ubyte[]) signature, const(ubyte[]) msg, const(secp256k1_pubkey) pubkey): Undocumented in source.

Manifest constants

KEYPAIR_SIZE enum KEYPAIR_SIZE;: Undocumented in source.
MESSAGE_SIZE enum MESSAGE_SIZE;: Undocumented in source.
PUBKEY_SIZE enum PUBKEY_SIZE;: Undocumented in source.
SECKEY_SIZE enum SECKEY_SIZE;: Undocumented in source.
SIGNATURE_SIZE enum SIGNATURE_SIZE;: Undocumented in source.
TWEAK_SIZE enum TWEAK_SIZE;: Undocumented in source.
XONLY_PUBKEY_SIZE enum XONLY_PUBKEY_SIZE;: Undocumented in source.

Static functions

check void check(bool flag, ConsensusFailCode code, string file, size_t line): Undocumented in source. Be warned that the author may not have intended to support it.

Variables

_ctx secp256k1_context* _ctx;: Undocumented in source.