package?com.security.cipher;

import?java.math.BigInteger;

import?org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import?org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import?org.bouncycastle.crypto.params.ECPublicKeyParameters;
import?org.bouncycastle.math.ec.ECPoint;

public?class?Cipher?{
	private?int?ct;
	private?ECPoint?p2;
	private?SM3Digest?sm3keybase;
	private?SM3Digest?sm3c3;
	private?byte?key[];
	private?byte?keyOff;

	public?Cipher（）?{
		this.ct?=?1;
		this.key?=?new?byte[32];
		this.keyOff?=?0;
	}

	private?void?Reset（）?{
		this.sm3keybase?=?new?SM3Digest（）;
		this.sm3c3?=?new?SM3Digest（）;

		byte?p[]?=?Util.byteConvert32Bytes（p2.getX（）.toBigInteger（））;
		this.sm3keybase.update（p?0?p.length）;
		this.sm3c3.update（p?0?p.length）;

		p?=?Util.byteConvert32Bytes（p2.getY（）.toBigInteger（））;
		this.sm3keybase.update（p?0?p.length）;
		this.ct?=?1;
		NextKey（）;
	}

	private?void?NextKey（）?{
		SM3Digest?sm3keycur?=?new?SM3Digest（this.sm3keybase）;
		sm3keycur.update（（byte）?（ct?>>?24?&?0xff））;
		sm3keycur.update（（byte）?（ct?>>?16?&?0xff））;
		sm3keycur.update（（byte）?（ct?>>?8?&?0xff））;
		sm3keycur.update（（byte）?（ct?&?0xff））;
		sm3keycur.doFinal（key?0）;
		this.keyOff?=?0;
		this.ct++;
	}

	public?ECPoint?Init_enc（SM2?sm2?ECPoint?userKey）?{
		AsymmetricCipherKeyPair?key?=?sm2.ecc_key_pair_generator
				.generateKeyPair（）;
		ECPrivateKeyParameters?ecpriv?=?（ECPrivateKeyParameters）?key
				.getPrivate（）;
		ECPublicKeyParameters?ecpub?=?（ECPublicKeyParameters）?key.getPublic（）;
		BigInteger?k?=?ecpriv.getD（）;
		ECPoint?c1?=?ecpub.getQ（）;
		this.p2?=?userKey.multiply（k）;
		Reset（）;
		return?c1;
	}

	public?void?Encrypt（byte?data[]）?{
		this.sm3c3.update（data?0?data.length）;
		for?（int?i?=?0;?i?			if?（keyOff?==?key.length）?{
				NextKey（）;
			}
			data[i]?^=?key[keyOff++];
		}
	}

	public?void?Init_dec（BigInteger?userD?ECPoint?c1）?{
		this.p2?=?c1.multiply（userD）;
		Reset（）;
	}

	public?void?Decrypt（byte?data[]）?{
		for?（int?i?=?0;?i?			if?（keyOff?==?key.length）?{
				NextKey（）;
			}
			data[i]?^=?key[keyOff++];
		}

		this.sm3c3.update（data?0?data.length）;
	}

	public?void?Dofinal（byte?c3[]）?{
		byte?p[]?=?Util.byteConvert32Bytes（p2.getY（）.toBigInteger（））;
		this.sm3c3.update（p?0?p.length）;
		this.sm3c3.doFinal（c3?0）;
		Reset（）;
	}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-05-15?16:48??cipher-sm\
?????文件?????????955??2018-05-15?16:21??cipher-sm\.classpath
?????文件?????????344??2018-04-26?18:02??cipher-sm\.gitignore
?????文件?????????561??2018-05-15?16:21??cipher-sm\.project
?????目錄???????????0??2018-04-26?18:04??cipher-sm\.settings\
?????文件?????????243??2018-04-26?18:04??cipher-sm\.settings\org.eclipse.jdt.core.prefs
?????文件??????????90??2018-04-26?18:04??cipher-sm\.settings\org.eclipse.m2e.core.prefs
?????文件????????1311??2018-04-26?18:02??cipher-sm\README.md
?????目錄???????????0??2018-04-26?18:02??cipher-sm\doc\
?????文件??????945731??2018-04-26?18:02??cipher-sm\doc\SM2橢圓曲線公鑰密碼算法.pdf
?????文件???????22552??2018-04-26?18:02??cipher-sm\doc\SM2橢圓曲線公鑰密碼算法推薦曲線參數.pdf
?????文件??????103677??2018-04-26?18:02??cipher-sm\doc\SM3密碼雜湊算法.pdf
?????文件??????205357??2018-04-26?18:02??cipher-sm\doc\SM4分組密碼算法.pdf
?????文件?????????805??2018-05-15?16:22??cipher-sm\pom.xml
?????目錄???????????0??2018-04-26?18:02??cipher-sm\src\
?????目錄???????????0??2018-04-26?18:02??cipher-sm\src\main\
?????目錄???????????0??2018-04-26?18:02??cipher-sm\src\main\java\
?????目錄???????????0??2018-05-15?16:17??cipher-sm\src\main\java\com\
?????目錄???????????0??2018-05-15?16:17??cipher-sm\src\main\java\com\security\
?????目錄???????????0??2018-05-15?16:10??cipher-sm\src\main\java\com\security\cipher\
?????文件????????2332??2018-05-15?16:19??cipher-sm\src\main\java\com\security\cipher\Cipher.java
?????文件????????6259??2018-05-15?16:19??cipher-sm\src\main\java\com\security\cipher\SM2.java
?????文件?????????380??2018-05-15?16:19??cipher-sm\src\main\java\com\security\cipher\SM2Result.java
?????文件????????5806??2018-05-15?16:19??cipher-sm\src\main\java\com\security\cipher\SM2Utils.java
?????文件????????7702??2018-05-15?16:19??cipher-sm\src\main\java\com\security\cipher\SM3.java
?????文件????????2601??2018-05-15?16:20??cipher-sm\src\main\java\com\security\cipher\SM3Digest.java
?????文件????????9381??2018-05-15?16:19??cipher-sm\src\main\java\com\security\cipher\SM4.java
?????文件????????3596??2018-05-15?16:20??cipher-sm\src\main\java\com\security\cipher\SM4Utils.java
?????文件?????????221??2018-05-15?16:19??cipher-sm\src\main\java\com\security\cipher\SM4_Context.java
?????文件???????15184??2018-05-15?16:19??cipher-sm\src\main\java\com\security\cipher\Util.java
?????目錄???????????0??2018-04-26?18:02??cipher-sm\src\test\
............此處省略29個文件信息