C#和JAVA的RSA密钥、公钥转换
C#的秘钥跟JAVA的密钥区别
RSA对于程序本身是没有区别的，其格式都是相同的。对于不同的程序来说，存储使用的语法（包装的类）会有所不同。 RSA语法和语法标准有很多，大的类型大概分为ASN.1、PKCS、X.509。
RSA语法介绍
ASN.1、PKCS是最初的，也是最主要的RSA公钥和私钥的语法标准，被RSA Lab所维护。 ASN.1、PKCS#1都定义了公钥和私钥的类型——序列化的数字。为了下一个层次的抽象（适当的包装），现在一般使用的组合是：PKCS#8的私钥，X.509的公钥 。 PKCS语法主要用于私钥，其内部标准目前有10种。目前JAVA普遍使用的是PKCS#8，用作私钥格式。 X.509语法主要用于公钥，广泛使用于web浏览器和SLL。 3种语法标准的公私钥可以实现相互转化，其核心为ASN1语法中的整数值（modulus，PublicExponent，privateExponent ），其余的数值都可以经过计算后得出。 .NET使用的是标准的RSA格式，然后将其中的数字base64编码后，生成XML进行存储。 java中使用的是PKCS#8,、X.509的公私钥语法，存储的都是相应的JAVA类自动生成的base64字符串。 由于存储格式的区别，在相互转换、读取的时候，需要理解RSA相关的知识，才能正确使用类来转换。密钥格式
java密钥：
私钥：
MIICdwIBADANBgkqhkiG9w0BAQEFAASCAmEwggJdAgEAAoGBAKSZSSEdPhv77O5ocnLNGXeQ21qJDArC1+yId+9/pY5bXkZk5vCB49EpfMwNukLv6AJqofThZPNOs1t015fdEYIUnkIc2QVxRwa0xTeFP
6N8D4WQXRWs4fNG27JK5kP45s+9KlJtx5hs7G97aMczehIWpHaO6j9inOmjlU8l62KZAgMBAAECgYEAmK3TRtMwRJb33OGnn9OeFumYfy92qxi3X6Hq1o6qDBW2qkd4bImfv+ni6AinyOVuaadt2Y+lq4
dKGcCVJzoZvPm1VKxD2y7xKa8/vEbPRiRTt0qnPq9T7UJkpDsiXf/zOMfWdjc3uA1bPnQ65RWHSJ7zAE+Gd7xnyCE5MEyijLECQQDVYqQWDqOVLZ5lJUuIfUIrhv26GvuoTX8v60+opCz4/Mdfh6JlefI
CVD6SAaYvufXBHVFY26JicNlR62ZOiBoNAkEAxXhsuEnNJNQcQHEVTPZoulbMbTV1VZIDQ1zjG8fvu8sv6IBYcR5+EsC8n3/6RkW8/iCJDzxE++VHzhoSQSoDvQJBAM6/63J/rpndAIrJ7vyJOPLJsc9/U
3SH2gMJAT7KC9UXvuldlsixtf3xuEpplKbLjEUXbfklnZm586a+6XqPvoUCQDFotltOLARBBmihYuEE7qNhQHk63QbyJ9rdDP5Qgo2Mg4o7QuXa6VSr4QZPsUGQBX/YiDLFs8ULU3IgV9zyNEkCQADAYR8
DctYzg0eBGdcOrDA5Szc62pYrS2wk89wUxyL4FyDL3omkVMKvtu5tccy7Xht2ikJZRqefZ3dS7ASm8/4=
公钥：
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCkmUkhHT4b++zuaHJyzRl3kNtaiQwKwtfsiHfvf6WOW15GZObwgePRKXzMDbpC7+gCaqH04WTzTrNbdNeX3RGCFJ5CHNkFcUcGtMU3hT+jfA+FkF0VrO
HzRtuySuZD+ObPvSpSbceYbOxve2jHM3oSFqR2juo/Ypzpo5VPJetimQIDAQAB c#密钥：
私钥：
pJlJIR0+G/vs7mhycs0Zd5DbWokMCsLX7Ih373+ljlteRmTm8IHj0Sl8zA26Qu/oAmqh9OFk806zW3TXl90RghSeQhzZBXFHBrTFN4U/o3wPhZBdFazh80bbskrmQ/jmz70qUm3HmGzsb3tox
zN6Ehakdo7qP2Kc6aOVTyXrYpk= AQAB 1WKkFg6jlS2eZSVLiH1CK4b9uhr7qE1/L+tPqKQs+PzHX4eiZXnyAlQ+kgGmL7n1wR1RWNuiYnDZUetmTogaDQ==
xXhsuEnNJNQcQHEVTPZoulbMbTV1VZIDQ1zjG8fvu8sv6IBYcR5+EsC8n3/6RkW8/iCJDzxE++VHzhoSQSoDvQ==
zr/rcn+umd0Aisnu/Ik48smxz39TdIfaAwkBPsoL1Re+6V2WyLG1/fG4SmmUpsuMRRdt+SWdmbnzpr7peo++hQ== MWi2W04sBEEGaKFi4QTuo2FAeTrdBvIn2t0M/lCCjYyDijtC5drpVKvhBk+xQZAFf9iIMsWzxQtTciBX3PI0SQ== wGEfA3LWM4NHgRnXDqwwOUs3OtqWK0tsJPPcFMci+Bcgy96JpFTCr7bubXHMu14bdopCWUann2d3UuwEpvP+ mK3TRtMwRJb33OGnn9OeFumYfy92qxi3X6Hq1o6qDBW2qkd4bImfv+ni6AinyOVuaadt2Y+lq4dKGcCVJzoZvPm1VKxD2y7xKa8/vEbPRiRTt0qnPq9T7UJkpDsiXf/zOMfWdjc3uA1bPnQ65RWHS
J7zAE+Gd7xnyCE5MEyijLE=
公钥：
pJlJIR0+G/vs7mhycs0Zd5DbWokMCsLX7Ih373+ljlteRmTm8IHj0Sl8zA26Qu/oAmqh9OFk806zW3TXl90RghSeQhzZBXFHBrTFN4U/o3wPhZBdFazh80bbskrmQ/jmz70qUm3HmGzsb3tox
zN6Ehakdo7qP2Kc6aOVTyXrYpk= AQAB
C#转JAVA（C#代码）
C#中的公私钥使用XML字符串进行存储，读取时直接读入字符串即可。 由于C#使用的是标准的RSA格式，因此JAVA的RSAPublicKeySpec、RSAPrivateKeySpec配置类的核心参数（modulus，PublicExponent，privateExponent ）都可以从对应XML中的节点值（Modulus-modulus 、Exponent-PublicExponent 、D-privateExponent ）base64解码后获取。然后将其传入JAVA配置类中，然后根据配置类生成相应的RSA公私钥。手动转换
void Convert()
{//公钥byte[] m = Base64.decodeBase64("mX/9zl8rflH5pLaP5P1Qd/9wXwNBSx7OpLlYDnGr7wD0njiDfPSUkgf9oF5NcvZwl24qdJ1SLmrgUtnr+yeXBNZNKaan1xXKISHdlHvbW5G8nJCJW6CuaHMkVw3Y7kwaIIlUdv09vxfjj0AoabttjbtF1kqETzbQ6fK3EN6sY5U=");byte[] e = Base64.decodeBase64("AQAB");BigInteger b1 = new BigInteger(1, m);BigInteger b2 = new BigInteger(1, e);//私钥byte[] m1 = Base64.decodeBase64("3RgqP5YOYUXft8YOlDphyaCoof27MSfTD2eVCFVXB5hatrls1fSUcmUuWuGV970sS6KQZZtyWHQ5970sCzKFlq82He8Uoe0JM3axBvd6PbSGjulUJr62qNW5hgkIEfxSRYl8AQsbbusFtks4obfepsfE02cLmmZepnZAdIOWifE=");byte[] e1 = Base64.decodeBase64("QcSZdLbHakolxX4GAjPnuNmwsBdRIsss7o0qeQMh02GPwoEgDfkmW20bv+8Q9FPypEEkYQU/m25ffAFq453QvLegYYi8OvWN+dvgchQRdeb22d+s6xYGGN9DRcPFRE48INde8FBHf/lzVgToV75h1H7g+jB4hLmLeuIuHsB43/0=");BigInteger b11 = new BigInteger(1, m1);BigInteger b21 = new BigInteger(1, e1);//公钥KeyFactory keyFactory = KeyFactory.getInstance("RSA");RSAPublicKeySpec keySpec = new RSAPublicKeySpec(b1, b2);RSAPublicKey pubKey = (RSAPublicKey) keyFactory.generatePublic(keySpec);//私钥RSAPrivateKeySpec priKeySpec = new RSAPrivateKeySpec(b11, b21);RSAPrivateKey priKey = (RSAPrivateKey) keyFactory.generatePrivate(priKeySpec);
}BouncyCastle Crypto转换
具体实现代码如下：
using System;
using System.Xml;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Pkcs;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.X509; ///
/// RSA密钥格式转换
///
public class RSAKeyConvert
{ /// /// RSA私钥格式转换，java->.net /// /// java生成的RSA私钥 /// {0} {1} {2}
{3}
{4} {5} {6} {7} /// RSA私钥格式转换，.net->java /// /// .net生成的私钥 /// /// RSA公钥格式转换，java->.net /// /// java生成的公钥 /// {0} {1} /// RSA公钥格式转换，.net->java /// /// .net生成的公钥 /// JAVA转C#（java代码）
就算不会JAVA的新手都可以转换的，只需要把以下的代码添加进eclipse中就可以了，具体的怎么建java工程就自己去查一下。
package com; import java.security.KeyFactory;
import java.security.PublicKey;
import java.security.interfaces.RSAPrivateCrtKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import com.sun.org.apache.xerces.internal.impl.dv.util.Base64; public class test { public static void main(String[] args) { String tes = "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"; byte[] temp = b64decode(tes); String ver = getRSAPrivateKeyAsNetFormat(temp);// 转换私钥 String tes1 = "MIGfMA0GCSqGSIb4DQEBAQUAA4GNADCBiQKBgQC/M9kJVwi+sO672NBm5fAEbUEl2PqRFuYZVB5ZrKah7eJPP0pKBe/eoA6pOMsjnKFoZGVizz7oCt+TJ+1fpuScn7vAtIFSjn1jgPANE+IcVdk4QKDFKu0LQdiurPQKLpq8Q3wJDAW7FxB2MHw/4ca/9w0N5VL0hQegZ4YhxDss6QIDAQAB"; byte[] temp1 = b64decode(tes1); String ver1 = getRSAPublicKeyAsNetFormat(temp1);// 转换公钥 System.out.println(ver); System.out.println(ver1); } private static String getRSAPrivateKeyAsNetFormat(byte[] encodedPrivkey) { try { StringBuffer buff = new StringBuffer(1024); PKCS8EncodedKeySpec pvkKeySpec = new PKCS8EncodedKeySpec( encodedPrivkey); KeyFactory keyFactory = KeyFactory.getInstance("RSA"); RSAPrivateCrtKey pvkKey = (RSAPrivateCrtKey) keyFactory .generatePrivate(pvkKeySpec); buff.append(""); buff.append("" + b64encode(removeMSZero(pvkKey.getModulus() .toByteArray())) + " "); buff.append("" + b64encode(removeMSZero(pvkKey.getPublicExponent() .toByteArray())) + " "); buff.append("" + b64encode(removeMSZero(pvkKey.getPrimeP().toByteArray())) + "
"); buff.append("" + b64encode(removeMSZero(pvkKey.getPrimeQ().toByteArray())) + "
"); buff.append("" + b64encode(removeMSZero(pvkKey.getPrimeExponentP() .toByteArray())) + " "); buff.append("" + b64encode(removeMSZero(pvkKey.getPrimeExponentQ() .toByteArray())) + " "); buff.append("" + b64encode(removeMSZero(pvkKey.getCrtCoefficient() .toByteArray())) + " "); buff.append("" + b64encode(removeMSZero(pvkKey.getPrivateExponent() .toByteArray())) + " "); buff.append(" "); return buff.toString().replaceAll("[ \t\n\r]", ""); } catch (Exception e) { System.err.println(e); return null; } } private static String getRSAPublicKeyAsNetFormat(byte[] encodedPrivkey) { try { StringBuffer buff = new StringBuffer(1024); PKCS8EncodedKeySpec pvkKeySpec = new PKCS8EncodedKeySpec( encodedPrivkey); KeyFactory keyFactory = KeyFactory.getInstance("RSA"); RSAPublicKey pukKey = (RSAPublicKey) keyFactory .generatePublic(new X509EncodedKeySpec(encodedPrivkey)); buff.append(""); buff.append("" + b64encode(removeMSZero(pukKey.getModulus() .toByteArray())) + " "); buff.append("" + b64encode(removeMSZero(pukKey.getPublicExponent() .toByteArray())) + " "); buff.append(" "); return buff.toString().replaceAll("[ \t\n\r]", ""); } catch (Exception e) { System.err.println(e); return null; } } public static String encodePublicKeyToXml(PublicKey key) { if (!RSAPublicKey.class.isInstance(key)) { return null; } RSAPublicKey pubKey = (RSAPublicKey) key; StringBuilder sb = new StringBuilder(); sb.append(""); sb.append("").append( Base64.encode(pubKey.getModulus().toByteArray())).append( " "); sb.append("").append( Base64.encode(pubKey.getPublicExponent().toByteArray())) .append(" "); sb.append(" "); return sb.toString(); } private static byte[] removeMSZero(byte[] data) { byte[] data1; int len = data.length; if (data[0] == 0) { data1 = new byte[data.length - 1]; System.arraycopy(data, 1, data1, 0, len - 1); } else data1 = data; return data1; } private static String b64encode(byte[] data) { String b64str = new String(Base64.encode(data)); return b64str; } private static byte[] b64decode(String data) { byte[] decodeData = Base64.decode(data); return decodeData; }
}
本文来自互联网用户投稿，文章观点仅代表作者本人，不代表本站立场，不承担相关法律责任。如若转载，请注明出处。 如若内容造成侵权/违法违规/事实不符，请点击【内容举报】进行投诉反馈！