Move to library-based build

1 files changed, 0 insertions, 494 deletions

diff --git a/app/src/main/java/com/trilead/ssh2/crypto/PEMDecoder.java b/app/src/main/java/com/trilead/ssh2/crypto/PEMDecoder.java
deleted file mode 100644
index 5c0c2fd..0000000
--- a/app/src/main/java/com/trilead/ssh2/crypto/PEMDecoder.java
+++ /dev/null
@@ -1,494 +0,0 @@
-
-package com.trilead.ssh2.crypto;
-
-import java.io.BufferedReader;
-import java.io.CharArrayReader;
-import java.io.IOException;
-import java.math.BigInteger;
-import java.security.DigestException;
-import java.security.KeyFactory;
-import java.security.KeyPair;
-import java.security.MessageDigest;
-import java.security.NoSuchAlgorithmException;
-import java.security.PrivateKey;
-import java.security.PublicKey;
-import java.security.spec.DSAPrivateKeySpec;
-import java.security.spec.DSAPublicKeySpec;
-import java.security.spec.ECParameterSpec;
-import java.security.spec.ECPoint;
-import java.security.spec.ECPrivateKeySpec;
-import java.security.spec.ECPublicKeySpec;
-import java.security.spec.InvalidKeySpecException;
-import java.security.spec.KeySpec;
-import java.security.spec.RSAPrivateCrtKeySpec;
-import java.security.spec.RSAPrivateKeySpec;
-import java.security.spec.RSAPublicKeySpec;
-
-import com.trilead.ssh2.crypto.cipher.AES;
-import com.trilead.ssh2.crypto.cipher.BlockCipher;
-import com.trilead.ssh2.crypto.cipher.CBCMode;
-import com.trilead.ssh2.crypto.cipher.DES;
-import com.trilead.ssh2.crypto.cipher.DESede;
-import com.trilead.ssh2.signature.ECDSASHA2Verify;
-
-/**
- * PEM Support.
- * 
- * @author Christian Plattner, plattner@trilead.com
- * @version $Id: PEMDecoder.java,v 1.2 2008/04/01 12:38:09 cplattne Exp $
- */
-public class PEMDecoder
-{
-	public static final int PEM_RSA_PRIVATE_KEY = 1;
-	public static final int PEM_DSA_PRIVATE_KEY = 2;
-	public static final int PEM_EC_PRIVATE_KEY = 3;
-
-	private static final int hexToInt(char c)
-	{
-		if ((c >= 'a') && (c <= 'f'))
-		{
-			return (c - 'a') + 10;
-		}
-
-		if ((c >= 'A') && (c <= 'F'))
-		{
-			return (c - 'A') + 10;
-		}
-
-		if ((c >= '0') && (c <= '9'))
-		{
-			return (c - '0');
-		}
-
-		throw new IllegalArgumentException("Need hex char");
-	}
-
-	private static byte[] hexToByteArray(String hex)
-	{
-		if (hex == null)
-			throw new IllegalArgumentException("null argument");
-
-		if ((hex.length() % 2) != 0)
-			throw new IllegalArgumentException("Uneven string length in hex encoding.");
-
-		byte decoded[] = new byte[hex.length() / 2];
-
-		for (int i = 0; i < decoded.length; i++)
-		{
-			int hi = hexToInt(hex.charAt(i * 2));
-			int lo = hexToInt(hex.charAt((i * 2) + 1));
-
-			decoded[i] = (byte) (hi * 16 + lo);
-		}
-
-		return decoded;
-	}
-
-	private static byte[] generateKeyFromPasswordSaltWithMD5(byte[] password, byte[] salt, int keyLen)
-			throws IOException
-	{
-		if (salt.length < 8)
-			throw new IllegalArgumentException("Salt needs to be at least 8 bytes for key generation.");
-
-		MessageDigest md5;
-		try {
-			md5 = MessageDigest.getInstance("MD5");
-		} catch (NoSuchAlgorithmException e) {
-			throw new IllegalArgumentException("VM does not support MD5", e);
-		}
-
-		byte[] key = new byte[keyLen];
-		byte[] tmp = new byte[md5.getDigestLength()];
-
-		while (true)
-		{
-			md5.update(password, 0, password.length);
-			md5.update(salt, 0, 8); // ARGH we only use the first 8 bytes of the
-			// salt in this step.
-			// This took me two hours until I got AES-xxx running.
-
-			int copy = (keyLen < tmp.length) ? keyLen : tmp.length;
-
-			try {
-				md5.digest(tmp, 0, tmp.length);
-			} catch (DigestException e) {
-				IOException ex = new IOException("could not digest password");
-				ex.initCause(e);
-				throw ex;
-			}
-
-			System.arraycopy(tmp, 0, key, key.length - keyLen, copy);
-
-			keyLen -= copy;
-
-			if (keyLen == 0)
-				return key;
-
-			md5.update(tmp, 0, tmp.length);
-		}
-	}
-
-	private static byte[] removePadding(byte[] buff, int blockSize) throws IOException
-	{
-		/* Removes RFC 1423/PKCS #7 padding */
-
-		int rfc_1423_padding = buff[buff.length - 1] & 0xff;
-
-		if ((rfc_1423_padding < 1) || (rfc_1423_padding > blockSize))
-			throw new IOException("Decrypted PEM has wrong padding, did you specify the correct password?");
-
-		for (int i = 2; i <= rfc_1423_padding; i++)
-		{
-			if (buff[buff.length - i] != rfc_1423_padding)
-				throw new IOException("Decrypted PEM has wrong padding, did you specify the correct password?");
-		}
-
-		byte[] tmp = new byte[buff.length - rfc_1423_padding];
-		System.arraycopy(buff, 0, tmp, 0, buff.length - rfc_1423_padding);
-		return tmp;
-	}
-
-	public static final PEMStructure parsePEM(char[] pem) throws IOException
-	{
-		PEMStructure ps = new PEMStructure();
-
-		String line = null;
-
-		BufferedReader br = new BufferedReader(new CharArrayReader(pem));
-
-		String endLine = null;
-
-		while (true)
-		{
-			line = br.readLine();
-
-			if (line == null)
-				throw new IOException("Invalid PEM structure, '-----BEGIN...' missing");
-
-			line = line.trim();
-
-			if (line.startsWith("-----BEGIN DSA PRIVATE KEY-----"))
-			{
-				endLine = "-----END DSA PRIVATE KEY-----";
-				ps.pemType = PEM_DSA_PRIVATE_KEY;
-				break;
-			}
-
-			if (line.startsWith("-----BEGIN RSA PRIVATE KEY-----"))
-			{
-				endLine = "-----END RSA PRIVATE KEY-----";
-				ps.pemType = PEM_RSA_PRIVATE_KEY;
-				break;
-			}
-
-			if (line.startsWith("-----BEGIN EC PRIVATE KEY-----")) {
-				endLine = "-----END EC PRIVATE KEY-----";
-				ps.pemType = PEM_EC_PRIVATE_KEY;
-				break;
-			}
-		}
-
-		while (true)
-		{
-			line = br.readLine();
-
-			if (line == null)
-				throw new IOException("Invalid PEM structure, " + endLine + " missing");
-
-			line = line.trim();
-
-			int sem_idx = line.indexOf(':');
-
-			if (sem_idx == -1)
-				break;
-
-			String name = line.substring(0, sem_idx + 1);
-			String value = line.substring(sem_idx + 1);
-
-			String values[] = value.split(",");
-
-			for (int i = 0; i < values.length; i++)
-				values[i] = values[i].trim();
-
-			// Proc-Type: 4,ENCRYPTED
-			// DEK-Info: DES-EDE3-CBC,579B6BE3E5C60483
-
-			if ("Proc-Type:".equals(name))
-			{
-				ps.procType = values;
-				continue;
-			}
-
-			if ("DEK-Info:".equals(name))
-			{
-				ps.dekInfo = values;
-				continue;
-			}
-			/* Ignore line */
-		}
-
-		StringBuffer keyData = new StringBuffer();
-
-		while (true)
-		{
-			if (line == null)
-				throw new IOException("Invalid PEM structure, " + endLine + " missing");
-
-			line = line.trim();
-
-			if (line.startsWith(endLine))
-				break;
-
-			keyData.append(line);
-
-			line = br.readLine();
-		}
-
-		char[] pem_chars = new char[keyData.length()];
-		keyData.getChars(0, pem_chars.length, pem_chars, 0);
-
-		ps.data = Base64.decode(pem_chars);
-
-		if (ps.data.length == 0)
-			throw new IOException("Invalid PEM structure, no data available");
-
-		return ps;
-	}
-
-	private static final void decryptPEM(PEMStructure ps, byte[] pw) throws IOException
-	{
-		if (ps.dekInfo == null)
-			throw new IOException("Broken PEM, no mode and salt given, but encryption enabled");
-
-		if (ps.dekInfo.length != 2)
-			throw new IOException("Broken PEM, DEK-Info is incomplete!");
-
-		String algo = ps.dekInfo[0];
-		byte[] salt = hexToByteArray(ps.dekInfo[1]);
-
-		BlockCipher bc = null;
-
-		if (algo.equals("DES-EDE3-CBC"))
-		{
-			DESede des3 = new DESede();
-			des3.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 24));
-			bc = new CBCMode(des3, salt, false);
-		}
-		else if (algo.equals("DES-CBC"))
-		{
-			DES des = new DES();
-			des.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 8));
-			bc = new CBCMode(des, salt, false);
-		}
-		else if (algo.equals("AES-128-CBC"))
-		{
-			AES aes = new AES();
-			aes.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 16));
-			bc = new CBCMode(aes, salt, false);
-		}
-		else if (algo.equals("AES-192-CBC"))
-		{
-			AES aes = new AES();
-			aes.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 24));
-			bc = new CBCMode(aes, salt, false);
-		}
-		else if (algo.equals("AES-256-CBC"))
-		{
-			AES aes = new AES();
-			aes.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 32));
-			bc = new CBCMode(aes, salt, false);
-		}
-		else
-		{
-			throw new IOException("Cannot decrypt PEM structure, unknown cipher " + algo);
-		}
-
-		if ((ps.data.length % bc.getBlockSize()) != 0)
-			throw new IOException("Invalid PEM structure, size of encrypted block is not a multiple of "
-					+ bc.getBlockSize());
-
-		/* Now decrypt the content */
-
-		byte[] dz = new byte[ps.data.length];
-
-		for (int i = 0; i < ps.data.length / bc.getBlockSize(); i++)
-		{
-			bc.transformBlock(ps.data, i * bc.getBlockSize(), dz, i * bc.getBlockSize());
-		}
-
-		/* Now check and remove RFC 1423/PKCS #7 padding */
-
-		dz = removePadding(dz, bc.getBlockSize());
-
-		ps.data = dz;
-		ps.dekInfo = null;
-		ps.procType = null;
-	}
-
-	public static final boolean isPEMEncrypted(PEMStructure ps) throws IOException
-	{
-		if (ps.procType == null)
-			return false;
-
-		if (ps.procType.length != 2)
-			throw new IOException("Unknown Proc-Type field.");
-
-		if ("4".equals(ps.procType[0]) == false)
-			throw new IOException("Unknown Proc-Type field (" + ps.procType[0] + ")");
-
-		if ("ENCRYPTED".equals(ps.procType[1]))
-			return true;
-
-		return false;
-	}
-
-	public static KeyPair decode(char[] pem, String password) throws IOException
-	{
-		PEMStructure ps = parsePEM(pem);
-		return decode(ps, password);
-	}
-
-	public static KeyPair decode(PEMStructure ps, String password) throws IOException
-	{
-		if (isPEMEncrypted(ps))
-		{
-			if (password == null)
-				throw new IOException("PEM is encrypted, but no password was specified");
-
-			decryptPEM(ps, password.getBytes("ISO-8859-1"));
-		}
-
-		if (ps.pemType == PEM_DSA_PRIVATE_KEY)
-		{
-			SimpleDERReader dr = new SimpleDERReader(ps.data);
-
-			byte[] seq = dr.readSequenceAsByteArray();
-
-			if (dr.available() != 0)
-				throw new IOException("Padding in DSA PRIVATE KEY DER stream.");
-
-			dr.resetInput(seq);
-
-			BigInteger version = dr.readInt();
-
-			if (version.compareTo(BigInteger.ZERO) != 0)
-				throw new IOException("Wrong version (" + version + ") in DSA PRIVATE KEY DER stream.");
-
-			BigInteger p = dr.readInt();
-			BigInteger q = dr.readInt();
-			BigInteger g = dr.readInt();
-			BigInteger y = dr.readInt();
-			BigInteger x = dr.readInt();
-
-			if (dr.available() != 0)
-				throw new IOException("Padding in DSA PRIVATE KEY DER stream.");
-
-			DSAPrivateKeySpec privSpec = new DSAPrivateKeySpec(x, p, q, g);
-			DSAPublicKeySpec pubSpec = new DSAPublicKeySpec(y, p, q, g);
-
-			return generateKeyPair("DSA", privSpec, pubSpec);
-		}
-
-		if (ps.pemType == PEM_RSA_PRIVATE_KEY)
-		{
-			SimpleDERReader dr = new SimpleDERReader(ps.data);
-
-			byte[] seq = dr.readSequenceAsByteArray();
-
-			if (dr.available() != 0)
-				throw new IOException("Padding in RSA PRIVATE KEY DER stream.");
-
-			dr.resetInput(seq);
-
-			BigInteger version = dr.readInt();
-
-			if ((version.compareTo(BigInteger.ZERO) != 0) && (version.compareTo(BigInteger.ONE) != 0))
-				throw new IOException("Wrong version (" + version + ") in RSA PRIVATE KEY DER stream.");
-
-			BigInteger n = dr.readInt();
-			BigInteger e = dr.readInt();
-			BigInteger d = dr.readInt();
-			// TODO: is this right?
-			BigInteger primeP = dr.readInt();
-			BigInteger primeQ = dr.readInt();
-			BigInteger expP = dr.readInt();
-			BigInteger expQ = dr.readInt();
-			BigInteger coeff = dr.readInt();
-
-			RSAPrivateKeySpec privSpec = new RSAPrivateCrtKeySpec(n, e, d, primeP, primeQ, expP, expQ, coeff);
-			RSAPublicKeySpec pubSpec = new RSAPublicKeySpec(n, e);
-
-			return generateKeyPair("RSA", privSpec, pubSpec);
-		}
-
-		if (ps.pemType == PEM_EC_PRIVATE_KEY) {
-			SimpleDERReader dr = new SimpleDERReader(ps.data);
-
-			byte[] seq = dr.readSequenceAsByteArray();
-
-			if (dr.available() != 0)
-				throw new IOException("Padding in EC PRIVATE KEY DER stream.");
-
-			dr.resetInput(seq);
-
-			BigInteger version = dr.readInt();
-
-			if ((version.compareTo(BigInteger.ONE) != 0))
-				throw new IOException("Wrong version (" + version + ") in EC PRIVATE KEY DER stream.");
-
-			byte[] privateBytes = dr.readOctetString();
-
-			String curveOid = null;
-			byte[] publicBytes = null;
-			while (dr.available() > 0) {
-				int type = dr.readConstructedType();
-				SimpleDERReader cr = dr.readConstructed();
-				switch (type) {
-				case 0:
-					curveOid = cr.readOid();
-					break;
-				case 1:
-					publicBytes = cr.readOctetString();
-					break;
-				}
-			}
-
-			ECParameterSpec params = ECDSASHA2Verify.getCurveForOID(curveOid);
-			if (params == null)
-				throw new IOException("invalid OID");
-
-			BigInteger s = new BigInteger(privateBytes);
-			byte[] publicBytesSlice = new byte[publicBytes.length - 1];
-			System.arraycopy(publicBytes, 1, publicBytesSlice, 0, publicBytesSlice.length);
-			ECPoint w = ECDSASHA2Verify.decodeECPoint(publicBytesSlice, params.getCurve());
-
-			ECPrivateKeySpec privSpec = new ECPrivateKeySpec(s, params);
-			ECPublicKeySpec pubSpec = new ECPublicKeySpec(w, params);
-
-			return generateKeyPair("EC", privSpec, pubSpec);
-		}
-
-		throw new IOException("PEM problem: it is of unknown type");
-	}
-
-	/**
-	 * Generate a {@code KeyPair} given an {@code algorithm} and {@code KeySpec}.
-	 */
-	private static KeyPair generateKeyPair(String algorithm, KeySpec privSpec, KeySpec pubSpec)
-			throws IOException {
-		try {
-			final KeyFactory kf = KeyFactory.getInstance(algorithm);
-			final PublicKey pubKey = kf.generatePublic(pubSpec);
-			final PrivateKey privKey = kf.generatePrivate(privSpec);
-			return new KeyPair(pubKey, privKey);
-		} catch (NoSuchAlgorithmException ex) {
-			IOException ioex = new IOException();
-			ioex.initCause(ex);
-			throw ioex;
-		} catch (InvalidKeySpecException ex) {
-			IOException ioex = new IOException("invalid keyspec");
-			ioex.initCause(ex);
-			throw ioex;
-		}
-	}
-}