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comparison src/ch/ethz/ssh2/crypto/KeyMaterial.java @ 307:071eccdff8ea ganymed

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fix java formatting
author Carl Byington <carl@five-ten-sg.com>
date Wed, 30 Jul 2014 14:16:58 -0700
parents 91a31873c42a
children
comparison
equal deleted inserted replaced
305:d2b303406d63 307:071eccdff8ea
24 public byte[] integrity_key_server_to_client; 24 public byte[] integrity_key_server_to_client;
25 25
26 private static byte[] calculateKey(HashForSSH2Types sh, BigInteger K, byte[] H, byte type, byte[] SessionID, 26 private static byte[] calculateKey(HashForSSH2Types sh, BigInteger K, byte[] H, byte type, byte[] SessionID,
27 int keyLength) throws IOException { 27 int keyLength) throws IOException {
28 byte[] res = new byte[keyLength]; 28 byte[] res = new byte[keyLength];
29
30 int dglen = sh.getDigestLength(); 29 int dglen = sh.getDigestLength();
31 int numRounds = (keyLength + dglen - 1) / dglen; 30 int numRounds = (keyLength + dglen - 1) / dglen;
32
33 byte[][] tmp = new byte[numRounds][]; 31 byte[][] tmp = new byte[numRounds][];
34
35 sh.reset(); 32 sh.reset();
36 sh.updateBigInt(K); 33 sh.updateBigInt(K);
37 sh.updateBytes(H); 34 sh.updateBytes(H);
38 sh.updateByte(type); 35 sh.updateByte(type);
39 sh.updateBytes(SessionID); 36 sh.updateBytes(SessionID);
40
41 tmp[0] = sh.getDigest(); 37 tmp[0] = sh.getDigest();
42
43 int off = 0; 38 int off = 0;
44 int produced = Math.min(dglen, keyLength); 39 int produced = Math.min(dglen, keyLength);
45
46 System.arraycopy(tmp[0], 0, res, off, produced); 40 System.arraycopy(tmp[0], 0, res, off, produced);
47
48 keyLength -= produced; 41 keyLength -= produced;
49 off += produced; 42 off += produced;
50 43
51 for(int i = 1; i < numRounds; i++) { 44 for (int i = 1; i < numRounds; i++) {
52 sh.updateBigInt(K); 45 sh.updateBigInt(K);
53 sh.updateBytes(H); 46 sh.updateBytes(H);
54 47
55 for(int j = 0; j < i; j++) { 48 for (int j = 0; j < i; j++) {
56 sh.updateBytes(tmp[j]); 49 sh.updateBytes(tmp[j]);
57 } 50 }
58 51
59 tmp[i] = sh.getDigest(); 52 tmp[i] = sh.getDigest();
60
61 produced = Math.min(dglen, keyLength); 53 produced = Math.min(dglen, keyLength);
62 System.arraycopy(tmp[i], 0, res, off, produced); 54 System.arraycopy(tmp[i], 0, res, off, produced);
63 keyLength -= produced; 55 keyLength -= produced;
64 off += produced; 56 off += produced;
65 } 57 }
67 return res; 59 return res;
68 } 60 }
69 61
70 public static KeyMaterial create(String hashType, byte[] H, BigInteger K, byte[] SessionID, int keyLengthCS, 62 public static KeyMaterial create(String hashType, byte[] H, BigInteger K, byte[] SessionID, int keyLengthCS,
71 int blockSizeCS, int macLengthCS, int keyLengthSC, int blockSizeSC, int macLengthSC) 63 int blockSizeCS, int macLengthCS, int keyLengthSC, int blockSizeSC, int macLengthSC)
72 throws IOException { 64 throws IOException {
73 KeyMaterial km = new KeyMaterial(); 65 KeyMaterial km = new KeyMaterial();
74
75 HashForSSH2Types sh = new HashForSSH2Types(hashType); 66 HashForSSH2Types sh = new HashForSSH2Types(hashType);
76
77 km.initial_iv_client_to_server = calculateKey(sh, K, H, (byte) 'A', SessionID, blockSizeCS); 67 km.initial_iv_client_to_server = calculateKey(sh, K, H, (byte) 'A', SessionID, blockSizeCS);
78
79 km.initial_iv_server_to_client = calculateKey(sh, K, H, (byte) 'B', SessionID, blockSizeSC); 68 km.initial_iv_server_to_client = calculateKey(sh, K, H, (byte) 'B', SessionID, blockSizeSC);
80
81 km.enc_key_client_to_server = calculateKey(sh, K, H, (byte) 'C', SessionID, keyLengthCS); 69 km.enc_key_client_to_server = calculateKey(sh, K, H, (byte) 'C', SessionID, keyLengthCS);
82
83 km.enc_key_server_to_client = calculateKey(sh, K, H, (byte) 'D', SessionID, keyLengthSC); 70 km.enc_key_server_to_client = calculateKey(sh, K, H, (byte) 'D', SessionID, keyLengthSC);
84
85 km.integrity_key_client_to_server = calculateKey(sh, K, H, (byte) 'E', SessionID, macLengthCS); 71 km.integrity_key_client_to_server = calculateKey(sh, K, H, (byte) 'E', SessionID, macLengthCS);
86
87 km.integrity_key_server_to_client = calculateKey(sh, K, H, (byte) 'F', SessionID, macLengthSC); 72 km.integrity_key_server_to_client = calculateKey(sh, K, H, (byte) 'F', SessionID, macLengthSC);
88
89 return km; 73 return km;
90 } 74 }
91 } 75 }