1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
package cz.crcs.ectester.applet;
import javacard.framework.ISO7816;
import javacard.security.*;
/**
* Class capable of testing ECDH/C and ECDSA.
* Note that ECDH and ECDHC output should equal, only the algorithm is different.
*
* @author Jan Jancar johny@neuromancer.sk
*/
public class ECKeyTester {
private KeyAgreement ecdhKeyAgreement = null;
private KeyAgreement ecdhcKeyAgreement = null;
private Signature ecdsaSignature = null;
private short sw = ISO7816.SW_NO_ERROR;
public short allocateECDH() {
sw = ISO7816.SW_NO_ERROR;
try {
ecdhKeyAgreement = KeyAgreement.getInstance(KeyAgreement.ALG_EC_SVDP_DH, false);
} catch (CryptoException ce) {
sw = ce.getReason();
} catch (Exception e) {
sw = ISO7816.SW_UNKNOWN;
}
return sw;
}
public short allocateECDHC() {
sw = ISO7816.SW_NO_ERROR;
try {
ecdhcKeyAgreement = KeyAgreement.getInstance(KeyAgreement.ALG_EC_SVDP_DHC, false);
} catch (CryptoException ce) {
sw = ce.getReason();
} catch (Exception e) {
sw = ISO7816.SW_UNKNOWN;
}
return sw;
}
public short allocateECDSA() {
sw = ISO7816.SW_NO_ERROR;
try {
ecdsaSignature = Signature.getInstance(Signature.ALG_ECDSA_SHA, false);
} catch (CryptoException ce) {
sw = ce.getReason();
} catch (Exception e) {
sw = ISO7816.SW_UNKNOWN;
}
return sw;
}
private short testKA(KeyAgreement ka, ECPrivateKey privateKey, byte[] pubkeyBuffer, short pubkeyOffset, short pubkeyLength, byte[] outputBuffer, short outputOffset) {
sw = ISO7816.SW_NO_ERROR;
short length = 0;
try {
ka.init(privateKey);
length = ka.generateSecret(pubkeyBuffer, pubkeyOffset, pubkeyLength, outputBuffer, outputOffset);
} catch (CryptoException ce) {
sw = ce.getReason();
} catch (Exception e) {
sw = ISO7816.SW_UNKNOWN;
}
return length;
}
private short testKA_validPoint(KeyAgreement ka, ECPrivateKey privateKey, byte[] pubkeyBuffer, short pubkeyOffset, short pubkeyLength, byte[] outputBuffer, short outputOffset) {
return testKA(ka, privateKey, pubkeyBuffer, pubkeyOffset, pubkeyLength, outputBuffer, outputOffset);
}
private short testKA_invalidPoint(KeyAgreement ka, ECPrivateKey privateKey, byte[] pubkeyBuffer, short pubkeyOffset, short pubkeyLength, byte[] outputBuffer, short outputOffset) {
pubkeyBuffer[(short)(pubkeyLength - 2)] += 0xcc;
pubkeyBuffer[(short)(pubkeyLength - 3)] += 0xcc;
short result = testKA(ka, privateKey, pubkeyBuffer, pubkeyOffset, pubkeyLength, outputBuffer, outputOffset);
pubkeyBuffer[(short)(pubkeyLength - 2)] -= 0xcc;
pubkeyBuffer[(short)(pubkeyLength - 3)] -= 0xcc;
return result;
}
public short testECDH(ECPrivateKey privateKey, byte[] pubkeyBuffer, short pubkeyOffset, short pubkeyLength, byte[] outputBuffer, short outputOffset) {
return testKA(ecdhKeyAgreement, privateKey, pubkeyBuffer, pubkeyOffset, pubkeyLength, outputBuffer, outputOffset);
}
/**
* Tests ECDH secret generation with given {@code privateKey} and {@code publicKey}.
* Uses {@code pubkeyBuffer} at {@code pubkeyOffset} for computations.
* Output should equal with ECDHC output.
* @param privateKey
* @param publicKey
* @param pubkeyBuffer
* @param pubkeyOffset
* @param outputBuffer
* @param outputOffset
* @return derived secret length
*
**/
public short testECDH_validPoint(ECPrivateKey privateKey, ECPublicKey publicKey, byte[] pubkeyBuffer, short pubkeyOffset, byte[] outputBuffer, short outputOffset) {
short length = publicKey.getW(pubkeyBuffer, pubkeyOffset);
return testKA_validPoint(ecdhKeyAgreement, privateKey, pubkeyBuffer, pubkeyOffset, length, outputBuffer, outputOffset);
}
public short testECDH_invalidPoint(ECPrivateKey privateKey, ECPublicKey publicKey, byte[] pubkeyBuffer, short pubkeyOffset, byte[] outputBuffer, short outputOffset) {
short length = publicKey.getW(pubkeyBuffer, pubkeyOffset);
return testKA_invalidPoint(ecdhKeyAgreement, privateKey, pubkeyBuffer, pubkeyOffset, length, outputBuffer, outputOffset);
}
/**
* Tests ECDHC secret generation with given {@code privateKey} and {@code publicKey}.
* Uses {@code pubkeyBuffer} at {@code pubkeyOffset} for computations.
* Output should equal to ECDH output.
* @param privateKey
* @param publicKey
* @param pubkeyBuffer
* @param pubkeyOffset
* @param outputBuffer
* @param outputOffset
* @return ISO7816.SW_NO_ERROR on correct operation,
* exception reason otherwise
*/
public short testECDHC_validPoint(ECPrivateKey privateKey, ECPublicKey publicKey, byte[] pubkeyBuffer, short pubkeyOffset, byte[] outputBuffer, short outputOffset) {
short length = publicKey.getW(pubkeyBuffer, pubkeyOffset);
return testKA_validPoint(ecdhcKeyAgreement, privateKey, pubkeyBuffer, pubkeyOffset, length, outputBuffer, outputOffset);
}
public short testECDHC_invalidPoint(ECPrivateKey privateKey, ECPublicKey publicKey, byte[] pubkeyBuffer, short pubkeyOffset, byte[] outputBuffer, short outputOffset) {
short length = publicKey.getW(pubkeyBuffer, pubkeyOffset);
return testKA_invalidPoint(ecdhcKeyAgreement, privateKey, pubkeyBuffer, pubkeyOffset, length, outputBuffer, outputOffset);
}
/**
* Uses {@code signKey} to sign data from {@code inputBuffer} at {@code inputOffset} with {@code inputOffset}.
* Then checks for correct signature length.
* Then tries verifying the data with {@code verifyKey}.
* @param signKey
* @param verifyKey
* @param inputBuffer
* @param inputOffset
* @param inputLength
* @param sigBuffer
* @param sigOffset
* @return signature length
*/
public short testECDSA(ECPrivateKey signKey, ECPublicKey verifyKey, byte[] inputBuffer, short inputOffset, short inputLength, byte[] sigBuffer, short sigOffset) {
sw = ISO7816.SW_NO_ERROR;
short length = 0;
try {
ecdsaSignature.init(signKey, Signature.MODE_SIGN);
length = ecdsaSignature.sign(inputBuffer, inputOffset, inputLength, sigBuffer, sigOffset);
ecdsaSignature.init(verifyKey, Signature.MODE_VERIFY);
boolean correct = ecdsaSignature.verify(inputBuffer, inputOffset, inputLength, sigBuffer, sigOffset, length);
if (!correct) {
sw = ECTesterApplet.SW_SIG_VERIFY_FAIL;
}
} catch (CryptoException ce) {
sw = ce.getReason();
} catch (Exception e) {
sw = ISO7816.SW_UNKNOWN;
}
return length;
}
public KeyAgreement getECDH() {
return ecdhKeyAgreement;
}
public KeyAgreement getECDHC() {
return ecdhcKeyAgreement;
}
public Signature getECDSA() {
return ecdsaSignature;
}
public short getSW() {
return sw;
}
}
|
