/SharpSSH/jsch/IdentityFile.cs
C# | 949 lines | 727 code | 67 blank | 155 comment | 112 complexity | 6d7707cc1784c309e06525d921b95b37 MD5 | raw file
Possible License(s): BSD-3-Clause
- using System;
- using System.IO;
-
- namespace Tamir.SharpSsh.jsch
- {
- /* -*-mode:java; c-basic-offset:2; -*- */
- /*
- Copyright (c) 2002,2003,2004 ymnk, JCraft,Inc. All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are met:
-
- 1. Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
-
- 2. Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in
- the documentation and/or other materials provided with the distribution.
-
- 3. The names of the authors may not be used to endorse or promote products
- derived from this software without specific prior written permission.
-
- THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
- INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
- INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
- INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
- OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
- EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
- internal class IdentityFile : Identity
- {
- String identity;
- byte[] key;
- byte[] iv;
- private JSch jsch;
- private HASH hash;
- private byte[] encoded_data;
-
- private Cipher cipher;
-
- // DSA
- private byte[] P_array;
- private byte[] Q_array;
- private byte[] G_array;
- private byte[] pub_array;
- private byte[] prv_array;
-
- // RSA
- private byte[] n_array; // modulus
- private byte[] e_array; // public exponent
- private byte[] d_array; // private exponent
-
- private byte[] p_array;
- private byte[] q_array;
- private byte[] dmp1_array;
- private byte[] dmq1_array;
- private byte[] iqmp_array;
-
- // private String algname="ssh-dss";
- private String algname="ssh-rsa";
-
- private const int ERROR=0;
- private const int RSA=1;
- private const int DSS=2;
- internal const int UNKNOWN=3;
-
- private const int OPENSSH=0;
- private const int FSECURE=1;
- private const int PUTTY=2;
-
- private int type=ERROR;
- private int keytype=OPENSSH;
-
- private byte[] publickeyblob=null;
-
- private bool encrypted=true;
-
- internal IdentityFile(String identity, JSch jsch)
- {
- this.identity=identity;
- this.jsch=jsch;
- try
- {
- Type c=Type.GetType(jsch.getConfig("3des-cbc"));
- cipher=(Cipher)Activator.CreateInstance(c);
- key=new byte[cipher.getBlockSize()]; // 24
- iv=new byte[cipher.getIVSize()]; // 8
- c=Type.GetType(jsch.getConfig("md5"));
- hash=(HASH)(Activator.CreateInstance(c));
- hash.init();
- FileInfo file=new FileInfo(identity);
- FileStream fis = File.OpenRead(identity);
- byte[] buf=new byte[(int)(file.Length)];
- int len=fis.Read(buf, 0, buf.Length);
- fis.Close();
-
- int i=0;
- while(i<len)
- {
- if(buf[i]=='B'&& buf[i+1]=='E'&& buf[i+2]=='G'&& buf[i+3]=='I')
- {
- i+=6;
- if(buf[i]=='D'&& buf[i+1]=='S'&& buf[i+2]=='A'){ type=DSS; }
- else if(buf[i]=='R'&& buf[i+1]=='S'&& buf[i+2]=='A'){ type=RSA; }
- else if(buf[i]=='S'&& buf[i+1]=='S'&& buf[i+2]=='H')
- { // FSecure
- type=UNKNOWN;
- keytype=FSECURE;
- }
- else
- {
- //System.out.println("invalid format: "+identity);
- throw new JSchException("invaid privatekey: "+identity);
- }
- i+=3;
- continue;
- }
- if(buf[i]=='C'&& buf[i+1]=='B'&& buf[i+2]=='C'&& buf[i+3]==',')
- {
- i+=4;
- for(int ii=0; ii<iv.Length; ii++)
- {
- iv[ii]=(byte)(((a2b(buf[i++])<<4)&0xf0)+
- (a2b(buf[i++])&0xf));
- }
- continue;
- }
- if(buf[i]==0x0d &&
- i+1<buf.Length && buf[i+1]==0x0a)
- {
- i++;
- continue;
- }
- if(buf[i]==0x0a && i+1<buf.Length)
- {
- if(buf[i+1]==0x0a){ i+=2; break; }
- if(buf[i+1]==0x0d &&
- i+2<buf.Length && buf[i+2]==0x0a)
- {
- i+=3; break;
- }
- bool inheader=false;
- for(int j=i+1; j<buf.Length; j++)
- {
- if(buf[j]==0x0a) break;
- //if(buf[j]==0x0d) break;
- if(buf[j]==':'){inheader=true; break;}
- }
- if(!inheader)
- {
- i++;
- encrypted=false; // no passphrase
- break;
- }
- }
- i++;
- }
-
- if(type==ERROR)
- {
- throw new JSchException("invaid privatekey: "+identity);
- }
-
- int start=i;
- while(i<len)
- {
- if(buf[i]==0x0a)
- {
- bool xd=(buf[i-1]==0x0d);
- Array.Copy(buf, i+1,
- buf,
- i-(xd ? 1 : 0),
- len-i-1-(xd ? 1 : 0)
- );
- if(xd)len--;
- len--;
- continue;
- }
- if(buf[i]=='-'){ break; }
- i++;
- }
- encoded_data=Util.fromBase64(buf, start, i-start);
-
- if(encoded_data.Length>4 && // FSecure
- encoded_data[0]==(byte)0x3f &&
- encoded_data[1]==(byte)0x6f &&
- encoded_data[2]==(byte)0xf9 &&
- encoded_data[3]==(byte)0xeb)
- {
-
- Buffer _buf=new Buffer(encoded_data);
- _buf.getInt(); // 0x3f6ff9be
- _buf.getInt();
- byte[]_type=_buf.getString();
- //System.out.println("type: "+new String(_type));
- byte[] _cipher=_buf.getString();
- String s_cipher=System.Text.Encoding.Default.GetString(_cipher);
- //System.out.println("cipher: "+cipher);
- if(s_cipher.Equals("3des-cbc"))
- {
- _buf.getInt();
- byte[] foo=new byte[encoded_data.Length-_buf.getOffSet()];
- _buf.getByte(foo);
- encoded_data=foo;
- encrypted=true;
- throw new JSchException("unknown privatekey format: "+identity);
- }
- else if(s_cipher.Equals("none"))
- {
- _buf.getInt();
- //_buf.getInt();
-
- encrypted=false;
-
- byte[] foo=new byte[encoded_data.Length-_buf.getOffSet()];
- _buf.getByte(foo);
- encoded_data=foo;
- }
-
- }
-
- try
- {
- file=new FileInfo(identity+".pub");
- fis=File.OpenRead(identity+".pub");
- buf=new byte[(int)(file.Length)];
- len=fis.Read(buf, 0, buf.Length);
- fis.Close();
- }
- catch
- {
- return;
- }
-
- if(buf.Length>4 && // FSecure's public key
- buf[0]=='-' && buf[1]=='-' && buf[2]=='-' && buf[3]=='-')
- {
-
- i=0;
- do{i++;}while(buf.Length>i && buf[i]!=0x0a);
- if(buf.Length<=i) return;
-
- while(true)
- {
- if(buf[i]==0x0a)
- {
- bool inheader=false;
- for(int j=i+1; j<buf.Length; j++)
- {
- if(buf[j]==0x0a) break;
- if(buf[j]==':'){inheader=true; break;}
- }
- if(!inheader)
- {
- i++;
- break;
- }
- }
- i++;
- }
- if(buf.Length<=i) return;
-
- start=i;
- while(i<len)
- {
- if(buf[i]==0x0a)
- {
- Array.Copy(buf, i+1, buf, i, len-i-1);
- len--;
- continue;
- }
- if(buf[i]=='-'){ break; }
- i++;
- }
- publickeyblob=Util.fromBase64(buf, start, i-start);
-
- if(type==UNKNOWN)
- {
- if(publickeyblob[8]=='d')
- {
- type=DSS;
- }
- else if(publickeyblob[8]=='r')
- {
- type=RSA;
- }
- }
- }
- else
- {
- if(buf[0]!='s'|| buf[1]!='s'|| buf[2]!='h'|| buf[3]!='-') return;
- i=0;
- while(i<len){ if(buf[i]==' ')break; i++;} i++;
- if(i>=len) return;
- start=i;
- while(i<len){ if(buf[i]==' ')break; i++;}
- publickeyblob=Util.fromBase64(buf, start, i-start);
- }
-
- }
- catch(System.Exception e)
- {
- Console.WriteLine("Identity: "+e);
- if(e is JSchException) throw (JSchException)e;
- throw new JSchException(e.ToString());
- }
-
- }
-
- public String getAlgName()
- {
- if(type==RSA) return "ssh-rsa";
- return "ssh-dss";
- }
-
- public bool setPassphrase(String _passphrase)
- {
- /*
- hash is MD5
- h(0) <- hash(passphrase, iv);
- h(n) <- hash(h(n-1), passphrase, iv);
- key <- (h(0),...,h(n))[0,..,key.Length];
- */
- try
- {
- if(encrypted)
- {
- if(_passphrase==null) return false;
- byte[] passphrase= System.Text.Encoding.Default.GetBytes( _passphrase );
- int hsize=hash.getBlockSize();
- byte[] hn=new byte[key.Length/hsize*hsize+
- (key.Length%hsize==0?0:hsize)];
- byte[] tmp=null;
- if(keytype==OPENSSH)
- {
- for(int index=0; index+hsize<=hn.Length;)
- {
- if(tmp!=null){ hash.update(tmp, 0, tmp.Length); }
- hash.update(passphrase, 0, passphrase.Length);
- hash.update(iv, 0, iv.Length);
- tmp=hash.digest();
- Array.Copy(tmp, 0, hn, index, tmp.Length);
- index+=tmp.Length;
- }
- Array.Copy(hn, 0, key, 0, key.Length);
- }
- else if(keytype==FSECURE)
- {
- for(int index=0; index+hsize<=hn.Length;)
- {
- if(tmp!=null){ hash.update(tmp, 0, tmp.Length); }
- hash.update(passphrase, 0, passphrase.Length);
- tmp=hash.digest();
- Array.Copy(tmp, 0, hn, index, tmp.Length);
- index+=tmp.Length;
- }
- Array.Copy(hn, 0, key, 0, key.Length);
- }
- }
- if(decrypt())
- {
- encrypted=false;
- return true;
- }
- P_array=Q_array=G_array=pub_array=prv_array=null;
- return false;
- }
- catch(System.Exception e)
- {
- if(e is JSchException) throw (JSchException)e;
- throw new JSchException(e.ToString());
- }
- }
-
- public byte[] getPublicKeyBlob()
- {
- if(publickeyblob!=null) return publickeyblob;
- if(type==RSA) return getPublicKeyBlob_rsa();
- return getPublicKeyBlob_dss();
- }
-
- byte[] getPublicKeyBlob_rsa()
- {
- if(e_array==null) return null;
- Buffer buf=new Buffer("ssh-rsa".Length+4+
- e_array.Length+4+
- n_array.Length+4);
- buf.putString( System.Text.Encoding.Default.GetBytes( "ssh-rsa" ) );
- buf.putString(e_array);
- buf.putString(n_array);
- return buf.buffer;
- }
-
- byte[] getPublicKeyBlob_dss()
- {
- if(P_array==null) return null;
- Buffer buf=new Buffer("ssh-dss".Length+4+
- P_array.Length+4+
- Q_array.Length+4+
- G_array.Length+4+
- pub_array.Length+4);
- buf.putString(System.Text.Encoding.Default.GetBytes("ssh-dss"));
- buf.putString(P_array);
- buf.putString(Q_array);
- buf.putString(G_array);
- buf.putString(pub_array);
- return buf.buffer;
- }
-
- public byte[] getSignature(Session session, byte[] data)
- {
- if(type==RSA) return getSignature_rsa(session, data);
- return getSignature_dss(session, data);
- }
-
- byte[] getSignature_rsa(Session session, byte[] data)
- {
- try
- {
- Type t=Type.GetType(jsch.getConfig("signature.rsa"));
- SignatureRSA rsa=(SignatureRSA)Activator.CreateInstance(t);
-
- rsa.init();
- rsa.setPrvKey(e_array, n_array, d_array, p_array, q_array, dmp1_array, dmq1_array, iqmp_array);
-
- /*
- byte[] goo=new byte[4];
- goo[0]=(byte)(session.getSessionId().Length>>>24);
- goo[1]=(byte)(session.getSessionId().Length>>>16);
- goo[2]=(byte)(session.getSessionId().Length>>>8);
- goo[3]=(byte)(session.getSessionId().Length);
- rsa.update(goo);
- rsa.update(session.getSessionId());
- */
- rsa.update(data);
- byte[] sig = rsa.sign();
- Buffer buf=new Buffer("ssh-rsa".Length+4+
- sig.Length+4);
- buf.putString( System.Text.Encoding.Default.GetBytes( "ssh-rsa" ));
- buf.putString(sig);
- return buf.buffer;
- }
- catch(System.Exception e)
- {
- Console.WriteLine(e);
- }
- return null;
- }
-
- byte[] getSignature_dss(Session session, byte[] data)
- {
- /*
- byte[] foo;
- int i;
- System.out.print("P ");
- foo=P_array;
- for(i=0; i<foo.Length; i++){
- System.out.print(Integer.toHexString(foo[i]&0xff)+":");
- }
- System.out.println("");
- System.out.print("Q ");
- foo=Q_array;
- for(i=0; i<foo.Length; i++){
- System.out.print(Integer.toHexString(foo[i]&0xff)+":");
- }
- System.out.println("");
- System.out.print("G ");
- foo=G_array;
- for(i=0; i<foo.Length; i++){
- System.out.print(Integer.toHexString(foo[i]&0xff)+":");
- }
- System.out.println("");
- */
-
- try
- {
- Type t=Type.GetType(jsch.getConfig("signature.dss"));
- SignatureDSA dsa=(SignatureDSA)(Activator.CreateInstance(t));
- dsa.init();
- dsa.setPrvKey(prv_array, P_array, Q_array, G_array);
-
- /*
- byte[] goo=new byte[4];
- goo[0]=(byte)(session.getSessionId().Length>>>24);
- goo[1]=(byte)(session.getSessionId().Length>>>16);
- goo[2]=(byte)(session.getSessionId().Length>>>8);
- goo[3]=(byte)(session.getSessionId().Length);
- dsa.update(goo);
- dsa.update(session.getSessionId());
- */
- dsa.update(data);
- byte[] sig = dsa.sign();
- Buffer buf=new Buffer("ssh-dss".Length+4+
- sig.Length+4);
- buf.putString( System.Text.Encoding.Default.GetBytes( "ssh-dss" ) );
- buf.putString(sig);
- return buf.buffer;
- }
- catch(System.Exception e)
- {
- Console.WriteLine("e "+e);
- }
- return null;
- }
-
- public bool decrypt()
- {
- if(type==RSA) return decrypt_rsa();
- return decrypt_dss();
- }
-
- bool decrypt_rsa()
- {
- // byte[] p_array;
- // byte[] q_array;
- // byte[] dmp1_array;
- // byte[] dmq1_array;
- // byte[] iqmp_array;
-
- try
- {
- byte[] plain;
- if(encrypted)
- {
- if(keytype==OPENSSH)
- {
- cipher.init(Cipher.DECRYPT_MODE, key, iv);
- plain=new byte[encoded_data.Length];
- cipher.update(encoded_data, 0, encoded_data.Length, plain, 0);
- }
- else if(keytype==FSECURE)
- {
- for(int i=0; i<iv.Length; i++)iv[i]=0;
- cipher.init(Cipher.DECRYPT_MODE, key, iv);
- plain=new byte[encoded_data.Length];
- cipher.update(encoded_data, 0, encoded_data.Length, plain, 0);
- }
- else
- {
- return false;
- }
- }
- else
- {
- if(n_array!=null) return true;
- plain=encoded_data;
- }
-
- if(keytype==FSECURE)
- { // FSecure
- Buffer buf=new Buffer(plain);
- int foo=buf.getInt();
- if(plain.Length!=foo+4)
- {
- return false;
- }
- e_array=buf.getMPIntBits();
- d_array=buf.getMPIntBits();
- n_array=buf.getMPIntBits();
- byte[] u_array=buf.getMPIntBits();
- p_array=buf.getMPIntBits();
- q_array=buf.getMPIntBits();
- return true;
- }
-
- int index=0;
- int Length=0;
-
- if(plain[index]!=0x30)return false;
- index++; // SEQUENCE
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
-
- if(plain[index]!=0x02)return false;
- index++; // INTEGER
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
- index+=Length;
-
- //System.out.println("int: len="+Length);
- //System.out.print(Integer.toHexString(plain[index-1]&0xff)+":");
- //System.out.println("");
-
- index++;
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
- n_array=new byte[Length];
- Array.Copy(plain, index, n_array, 0, Length);
- index+=Length;
- /*
- System.out.println("int: N len="+Length);
- for(int i=0; i<n_array.Length; i++){
- System.out.print(Integer.toHexString(n_array[i]&0xff)+":");
- }
- System.out.println("");
- */
- index++;
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
- e_array=new byte[Length];
- Array.Copy(plain, index, e_array, 0, Length);
- index+=Length;
- /*
- System.out.println("int: E len="+Length);
- for(int i=0; i<e_array.Length; i++){
- System.out.print(Integer.toHexString(e_array[i]&0xff)+":");
- }
- System.out.println("");
- */
- index++;
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
- d_array=new byte[Length];
- Array.Copy(plain, index, d_array, 0, Length);
- index+=Length;
- /*
- System.out.println("int: D len="+Length);
- for(int i=0; i<d_array.Length; i++){
- System.out.print(Integer.toHexString(d_array[i]&0xff)+":");
- }
- System.out.println("");
- */
-
- index++;
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
- p_array=new byte[Length];
- Array.Copy(plain, index, p_array, 0, Length);
- index+=Length;
- /*
- System.out.println("int: P len="+Length);
- for(int i=0; i<p_array.Length; i++){
- System.out.print(Integer.toHexString(p_array[i]&0xff)+":");
- }
- System.out.println("");
- */
- index++;
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
- q_array=new byte[Length];
- Array.Copy(plain, index, q_array, 0, Length);
- index+=Length;
- /*
- System.out.println("int: q len="+Length);
- for(int i=0; i<q_array.Length; i++){
- System.out.print(Integer.toHexString(q_array[i]&0xff)+":");
- }
- System.out.println("");
- */
- index++;
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
- dmp1_array=new byte[Length];
- Array.Copy(plain, index, dmp1_array, 0, Length);
- index+=Length;
- /*
- System.out.println("int: dmp1 len="+Length);
- for(int i=0; i<dmp1_array.Length; i++){
- System.out.print(Integer.toHexString(dmp1_array[i]&0xff)+":");
- }
- System.out.println("");
- */
- index++;
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
- dmq1_array=new byte[Length];
- Array.Copy(plain, index, dmq1_array, 0, Length);
- index+=Length;
- /*
- System.out.println("int: dmq1 len="+Length);
- for(int i=0; i<dmq1_array.Length; i++){
- System.out.print(Integer.toHexString(dmq1_array[i]&0xff)+":");
- }
- System.out.println("");
- */
- index++;
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
- iqmp_array=new byte[Length];
- Array.Copy(plain, index, iqmp_array, 0, Length);
- index+=Length;
- /*
- System.out.println("int: iqmp len="+Length);
- for(int i=0; i<iqmp_array.Length; i++){
- System.out.print(Integer.toHexString(iqmp_array[i]&0xff)+":");
- }
- System.out.println("");
- */
- }
- catch
- {
- //System.out.println(e);
- return false;
- }
- return true;
- }
-
- bool decrypt_dss()
- {
- try
- {
- byte[] plain;
- if(encrypted)
- {
- if(keytype==OPENSSH)
- {
- cipher.init(Cipher.DECRYPT_MODE, key, iv);
- plain=new byte[encoded_data.Length];
- cipher.update(encoded_data, 0, encoded_data.Length, plain, 0);
- /*
- for(int i=0; i<plain.Length; i++){
- System.out.print(Integer.toHexString(plain[i]&0xff)+":");
- }
- System.out.println("");
- */
- }
- else if(keytype==FSECURE)
- {
- for(int i=0; i<iv.Length; i++)iv[i]=0;
- cipher.init(Cipher.DECRYPT_MODE, key, iv);
- plain=new byte[encoded_data.Length];
- cipher.update(encoded_data, 0, encoded_data.Length, plain, 0);
- }
- else
- {
- return false;
- }
- }
- else
- {
- if(P_array!=null) return true;
- plain=encoded_data;
- }
-
- if(keytype==FSECURE)
- { // FSecure
- Buffer buf=new Buffer(plain);
- int foo=buf.getInt();
- if(plain.Length!=foo+4)
- {
- return false;
- }
- P_array=buf.getMPIntBits();
- G_array=buf.getMPIntBits();
- Q_array=buf.getMPIntBits();
- pub_array=buf.getMPIntBits();
- prv_array=buf.getMPIntBits();
- return true;
- }
-
- int index=0;
- int Length=0;
-
- if(plain[index]!=0x30)return false;
- index++; // SEQUENCE
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
-
- if(plain[index]!=0x02)return false;
- index++; // INTEGER
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
- index+=Length;
-
- index++;
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
- P_array=new byte[Length];
- Array.Copy(plain, index, P_array, 0, Length);
- index+=Length;
-
- index++;
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
- Q_array=new byte[Length];
- Array.Copy(plain, index, Q_array, 0, Length);
- index+=Length;
-
- index++;
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
- G_array=new byte[Length];
- Array.Copy(plain, index, G_array, 0, Length);
- index+=Length;
-
- index++;
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
- pub_array=new byte[Length];
- Array.Copy(plain, index, pub_array, 0, Length);
- index+=Length;
-
- index++;
- Length=plain[index++]&0xff;
- if((Length&0x80)!=0)
- {
- int foo=Length&0x7f; Length=0;
- while(foo-->0){ Length=(Length<<8)+(plain[index++]&0xff); }
- }
- prv_array=new byte[Length];
- Array.Copy(plain, index, prv_array, 0, Length);
- index+=Length;
- }
- catch
- {
- //System.out.println(e);
- //e.printStackTrace();
- return false;
- }
- return true;
- }
-
- public bool isEncrypted()
- {
- return encrypted;
- }
- public String getName(){return identity;}
-
- private int writeSEQUENCE(byte[] buf, int index, int len)
- {
- buf[index++]=0x30;
- index=writeLength(buf, index, len);
- return index;
- }
- private int writeINTEGER(byte[] buf, int index, byte[] data)
- {
- buf[index++]=0x02;
- index=writeLength(buf, index, data.Length);
- Array.Copy(data, 0, buf, index, data.Length);
- index+=data.Length;
- return index;
- }
-
- private int countLength(int i_len)
- {
- uint len = (uint)i_len;
- int i=1;
- if(len<=0x7f) return i;
- while(len>0)
- {
- len>>=8;
- i++;
- }
- return i;
- }
-
- private int writeLength(byte[] data, int index, int i_len)
- {
- int len = (int)i_len;
- int i=countLength(len)-1;
- if(i==0)
- {
- data[index++]=(byte)len;
- return index;
- }
- data[index++]=(byte)(0x80|i);
- int j=index+i;
- while(i>0)
- {
- data[index+i-1]=(byte)(len&0xff);
- len>>=8;
- i--;
- }
- return j;
- }
-
- private byte a2b(byte c)
- {
- if('0'<=c&&c<='9') return (byte)(c-'0');
- if('a'<=c&&c<='z') return (byte)(c-'a'+10);
- return (byte)(c-'A'+10);
- }
- private byte b2a(byte c)
- {
- if(0<=c&&c<=9) return (byte)(c+'0');
- return (byte)(c-10+'A');
- }
- }
-
- }