寻找帮助将此C＃代码转换为Java
我有字节数组，但需要帮助将转换编码为BigInteger。
寻求为Hadoop创建UDF；
C＃代码
Ouput，这与SQL Server相同
//A4-B7-83-01-00-59-25-A8-B5-7C-F7-16-E6-69-CF-14-A2-2E-22-09
//-6330555844639082588
// Unicode
byte[] byteArray = Encoding.UTF8.GetBytes("JAO21V279RSNHYGX23L0");
//Console.WriteLine(byteArray);
System.Security.Cryptography.SHA1 sha = new System.Security.Cryptography.SHA1CryptoServiceProvider();
byte[] hashedPasswordBytes = sha.ComputeHash(byteArray);
//Console.WriteLine(hashedPasswordBytes);
Console.WriteLine("1: " + BitConverter.ToString(hashedPasswordBytes));
//Console.WriteLine(BitConverter.ToInt64(hashedPasswordBytes,0));
long value = BitConverter.ToInt64(hashedPasswordBytes, 0);
Console.WriteLine("2: " + value);
if (BitConverter.IsLittleEndian)
Array.Reverse(hashedPasswordBytes);
Console.WriteLine("3: " + BitConverter.ToString(hashedPasswordBytes));
value = BitConverter.ToInt64(hashedPasswordBytes, 0);
Console.WriteLine("4: " + value);
1：A4-B7-83-01-00-59-25-A8-B5-7C-F7-16-E6-69-CF-14-A2-2E-22-09
2：-6330555844639082588
翻转值
3：09-22-2E-A2-14-CF-69-E6-16-F7-7C-B5-A8-25-59-00-01-83-B7-A4
4：-1843714884904279543-正确的BigInt
SQL Server代码
DECLARE @InputString VARCHAR(MAX) = 'JAO21V279RSNHYGX23L0'
SELECT CONVERT(BIGINT, HashBytes('SHA1', @InputString)) , HashBytes('SHA1', @InputString)
-1843714884904279543 0xA4B78301005925A8B57CF716E669CF14A22E2209
Java输出
strHash：1a41b71831011001591251a81b517c1f71161e61691cf1141a212e122109
到目前为止我拥有的Java代码
导入java.nio.ByteBuffer;
导入java.nio.ByteOrder;
导入java.security.MessageDigest;
导入java.security.NoSuchAlgorithmException;
导入java.lang.System。*;
导入静态java.lang.System.out;
导入java.math.BigInteger;
导入java.nio.charset.Charset;
class JceSha1Test {
private static final Charset UTF8_CHARSET = Charset.forName("UTF-8");
public static void main(String[] a) {
try {
String strHash = "JAO21V279RSNHYGX23L0";
strHash = encryptPassword(strHash);
System.out.println("strHash: " + strHash);
} catch (Exception e) {
System.out.println("Exception: "+e);
}
}
public static String encryptPassword(String password) {
String returnValue = null;
byte[] buf = password.getBytes(UTF8_CHARSET);
ByteBuffer bb = ByteBuffer.wrap( buf );
MessageDigest algorithm=null;
try {
algorithm = MessageDigest.getInstance("SHA-1");
} catch (NoSuchAlgorithmException e) {
//sClassLog.logException(e);
}
algorithm.reset();
algorithm.update(buf);
byte[] digest = algorithm.digest();
returnValue = "";
for (int byteIdx = 0; byteIdx < digest.length; byteIdx++) {
//System.out.println( Integer.toHexString(digest[byteIdx]) );
//returnValue += Integer.toHexString(digest[byteIdx] + 256 & 0xFF);
//returnValue += Integer.toHexString((digest[byteIdx] + 256 & 0xFF) + 0x100 );
//returnValue += Integer.toHexString( ( digest[byteIdx] & 255 ) );
//returnValue += Integer.toHexString( ( 0xFF & digest[byteIdx] ) );
//returnValue += Integer.toHexString( ( digest[byteIdx] & 0xFF ) );
returnValue += Integer.toString( ( digest[byteIdx] & 0xFF ) + 0x100, 16).substring( 1 );
//returnValue += Integer.toHexString( ( digest[byteIdx] + 256 ) ); // Orig
}
return returnValue;
}
//A4-B7-83-01-00-59-25-A8-B5-7C-F7-16-E6-69-CF-14-A2-2E-22-09
//-1843714884904279543
}
谢谢你的帮助！
///////////////////////// *********************** *** //////////////////////////
我的最终代码与SQL Server中的HashBytes匹配：
package com.cb.hiveudf;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.security.MessageDigest;
import org.apache.hadoop.hive.ql.exec.Description;
import org.apache.hadoop.hive.ql.exec.UDF;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.LongWritable;
/**
* Implementation of the HashBytes UDF found in many databases.
*/
@Description(name = "hashBytes",
value = "_FUNC_(Charset, Value) - assigns a unique Biginterger to each string to which it is applied",
extended = "Example:\n "
+ " > SELECT name, _FUNC_(\"UTF-16LE\", value) hashkey FROM src" + " ")
public class UDFHashBytes extends UDF {
private final LongWritable result = new LongWritable();
public LongWritable evaluate(Text input) throws Exception {
if (input == null)
{
return null;
}
else
{
String hashstring = input.toString();
byte[] buf = hashstring.getBytes("UTF-8");
MessageDigest algorithm=null;
algorithm = MessageDigest.getInstance("SHA-1");
algorithm.reset();
algorithm.update(buf);
byte[] digest = algorithm.digest();
if(java.nio.ByteOrder.nativeOrder() == ByteOrder.LITTLE_ENDIAN) {
for (int i = 0, j = digest.length - 1; i < j; i++, j--)
{
byte b = digest[i];
digest[i] = digest[j];
digest[j] = b;
}
}
ByteBuffer bb = ByteBuffer.wrap( digest );
if(java.nio.ByteOrder.nativeOrder() == ByteOrder.LITTLE_ENDIAN)
{
bb.order(ByteOrder.LITTLE_ENDIAN);
}
result.set(bb.getLong());
return result;
}
}
}
最佳答案
好吧，我希望您仍然可以识别一些代码:)
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
final class JceSha1Test {
public static void main(final String ... args) {
final String strHashInput = "JAO21V279RSNHYGX23L0";
final byte[] strHash = hashPassword(strHashInput);
System.out.println("strHash: " + toHex(strHash));
final ByteBuffer strHashBuffer = ByteBuffer.wrap(strHash);
strHashBuffer.order(ByteOrder.LITTLE_ENDIAN);
final long test = strHashBuffer.getLong();
System.out.println(test);
}
public static byte[] hashPassword(final String password) {
final byte[] encodedPassword = password.getBytes(StandardCharsets.UTF_8);
final MessageDigest algorithm;
try {
algorithm = MessageDigest.getInstance("SHA-1");
} catch (final NoSuchAlgorithmException e) {
throw new IllegalStateException(e);
}
return algorithm.digest(encodedPassword);
}
public static String toHex(final byte[] data) {
final StringBuilder sb = new StringBuilder(data.length * 2);
for (int i = 0; i < data.length; i++) {
sb.append(String.format("%02X", data[i]));
}
return sb.toString();
}
}