github.com/igggame/nebulas-go@v2.1.0+incompatible/crypto/keystore/signature.go (about)

     1  // Copyright (C) 2017 go-nebulas authors
     2  //
     3  // This file is part of the go-nebulas library.
     4  //
     5  // the go-nebulas library is free software: you can redistribute it and/or modify
     6  // it under the terms of the GNU General Public License as published by
     7  // the Free Software Foundation, either version 3 of the License, or
     8  // (at your option) any later version.
     9  //
    10  // the go-nebulas library is distributed in the hope that it will be useful,
    11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13  // GNU General Public License for more details.
    14  //
    15  // You should have received a copy of the GNU General Public License
    16  // along with the go-nebulas library.  If not, see <http://www.gnu.org/licenses/>.
    17  //
    18  
    19  package keystore
    20  
    21  // Signature interface of different signature algorithm
    22  type Signature interface {
    23  
    24  	// Algorithm returns the standard algorithm for this key.
    25  	Algorithm() Algorithm
    26  
    27  	// InitSign this object for signing. If this method is called
    28  	// again with a different argument, it negates the effect
    29  	// of this call.
    30  	InitSign(privateKey PrivateKey) error
    31  
    32  	// Sign returns the signature bytes of all the data input.
    33  	// The format of the signature depends on the underlying
    34  	// signature scheme.
    35  	Sign(data []byte) (out []byte, err error)
    36  
    37  	// RecoverPublic returns a public key, which is recoverd by data and signature
    38  	RecoverPublic(data []byte, signature []byte) (PublicKey, error)
    39  
    40  	// InitVerify initializes this object for verification. If this method is called
    41  	// again with a different argument, it negates the effect
    42  	// of this call.
    43  	InitVerify(publicKey PublicKey) error
    44  
    45  	// Verify the passed-in signature.
    46  	//
    47  	// <p>A call to this method resets this signature object to the state
    48  	// it was in when previously initialized for verification via a
    49  	// call to <code>initVerify(PublicKey)</code>. That is, the object is
    50  	// reset and available to verify another signature from the identity
    51  	// whose public key was specified in the call to <code>initVerify</code>.
    52  	Verify(data []byte, signature []byte) (bool, error)
    53  }