java – PKCS11 deriveKey()和encrypt()返回3DES的不同结果
作者：互联网
我正在使用HSM和PKCS11处理密钥派生问题,目前我无法理解为什么我看到完全不同的结果取决于我是否使用deriveKey()方法而不是使用encrypt()方法.在这两种情况下,我都试图使用DESede / ECB / NoPadding算法来获得结果,但是根据我用来生成结果的方法(deriveKey与加密),我看到了不同的结果.
退一步以提供高级概述……我正在使用Global Platform使用的特定密钥派生方法来使用于智能卡的主密钥多样化.该方法以主密钥和用于导出新密钥的8字节数据(多样化数据)开始. div数据字节实际上只是使用DESede / ECB / NoPadding用主密钥加密,结果用作新导出的3DES密钥的一部分. (实际上,执行了多次加密,并将结果连接在一起形成新密钥,但这不是问题.)
我在两种情况下都验证了主密钥,验证了两种情况下的多样化数据是相同的,验证我使用相同的算法和相同的填充.我也尝试将派生密钥模板更改为DES,2DES,3DES.所有产生的结果都相似,只是长度不同.
目前我已经使用IAIK包装器(用Java编写的pkcs11包装器)实现了我的测试用例,我将在此处发布.密钥只是一个测试密钥,div数据是样本div数据,所以这里没有敏感信息.我首先在HSM中创建基本密钥,然后尝试使用多样化数据调用session.deriveKey()来获取新密钥.派生的关键字节以十六进制打印(键值不正确,基于我当前工作的实现,它在内存中而不是在HSM中导出密钥).接下来,我只是初始化会话以使用主密钥执行加密,然后加密多样化数据.这会产生预期值(再次根据工作实现进行检查).
当我使用相同的基本密钥,相同的div数据和相同的加密算法时,我正在寻找的是对这些操作产生不同结果的原因的任何了解.我不明白deriveKey()在表面下做了什么,我无法找到任何文档或源代码来阐明这一点.我必须能够使用deriveKey()方法,因为派生密钥在HSM外部不可用.
有任何见解赞赏.
Mechanism keyGenerationMechanism = Mechanism.get(PKCS11Constants.CKM_DES3_KEY_GEN);
List supportedMechanisms = Arrays.asList(token.getMechanismList());
if (!supportedMechanisms.contains(Mechanism.get(PKCS11Constants.CKM_DES3_KEY_GEN))) {
output_.println("Mechanism not supported: DES3_KEY_GEN");
return;
}
// This is the master key that I want to diversify
DES3SecretKey baseKeyTemplate = new DES3SecretKey();
baseKeyTemplate.getValue().setByteArrayValue(new byte[] {0x3d, 0x20, 0x5b, 0x29, (byte) 0xfd, 0x04, (byte) 0xd9, (byte) 0x89, (byte) 0xd0, (byte) 0xfd, (byte) 0x85, (byte) 0xd5, (byte) 0xf7, (byte) 0xb3, 0x31, (byte) 0xd3,
0x3d, 0x20, 0x5b, 0x29, (byte) 0xfd, 0x04, (byte) 0xd9, (byte) 0x89});
baseKeyTemplate.getDerive().setBooleanValue(Boolean.TRUE);
baseKeyTemplate.getToken().setBooleanValue(Boolean.TRUE);
baseKeyTemplate.getPrivate().setBooleanValue(Boolean.TRUE);
baseKeyTemplate.getSensitive().setBooleanValue(Boolean.FALSE);
baseKeyTemplate.getExtractable().setBooleanValue(Boolean.TRUE);
baseKeyTemplate.getLabel().setCharArrayValue("GP-3des-aba".toCharArray());
baseKeyTemplate.getObjectClass().setLongValue(PKCS11Constants.CKO_SECRET_KEY);
baseKeyTemplate.getKeyType().setLongValue(PKCS11Constants.CKK_DES3);
baseKeyTemplate.getEncrypt().setBooleanValue(Boolean.TRUE);
baseKeyTemplate.getDecrypt().setBooleanValue(Boolean.TRUE);
baseKeyTemplate.getWrap().setBooleanValue(Boolean.TRUE);
baseKeyTemplate.getUnwrap().setBooleanValue(Boolean.TRUE);
output_.println("baseKeyTemplate: " + baseKeyTemplate.toString());
SecretKey baseKey = (SecretKey) session.createObject(baseKeyTemplate);
System.out.println("Base key: ");
System.out.println(baseKey.toString());
output_
.println("################################################################################");
output_.println("derive key");
//DES3 Key Template
DESSecretKey derived3DESKeyTemplate = new DESSecretKey();
SecretKey derivedKeyTemplate = derived3DESKeyTemplate;
derivedKeyTemplate.getSensitive().setBooleanValue(Boolean.FALSE);
derivedKeyTemplate.getToken().setBooleanValue(Boolean.TRUE);
derivedKeyTemplate.getExtractable().setBooleanValue(Boolean.TRUE);
derivedKeyTemplate.getPrivate().setBooleanValue(Boolean.FALSE);
derivedKeyTemplate.getKeyType().setLongValue(PKCS11Constants.CKK_DES);
// This represents the diversification data (.ie div bytes from some smart card)
byte[] data = new byte[] {0x00, (byte) 0x84, 0x30, (byte) 0x95, 0x35, 0x05,(byte) 0xf0, 0x01};
KeyDerivationStringDataParameters param = new KeyDerivationStringDataParameters(data);
Mechanism mechanism = Mechanism.get(PKCS11Constants.CKM_DES3_ECB);
if (!supportedMechanisms.contains(Mechanism
.get(PKCS11Constants.CKM_DES3_ECB))) {
output_.println("Mechanism not supported: CKM_DES3_ECB");
return;
}
mechanism.setParameters(param);
System.out.println("Derivation Mechanism: ");
output_.println(mechanism.toString());
output_
.println("--------------------------------------------------------------------------------");
Key derivedKey = session.deriveKey(mechanism, baseKey, derivedKeyTemplate);
if (derivedKey == null) {
output_.println("Found NO key that can be used for encryption.");
output_.flush();
System.exit(0);
}
System.out.println("Derived key: ");
output_.println(derivedKey.toString());
output_
.println("################################################################################");
output_.println("finished");
// initialize for encryption
Mechanism encryptionMechanism = Mechanism.get(PKCS11Constants.CKM_DES3_ECB);
session.encryptInit(encryptionMechanism, baseKey);
byte[] encryptedData = session.encrypt(data);
System.out.println("Encrypted data: " + new String(Hex.encodeHex(encryptedData)));
// This is the second part of the derived key, let's not worry about this yet since the first part isn't
// working.
// data = new byte[] {0x00, (byte) 0x84, 0x30, (byte) 0x95, 0x35, 0x05,(byte) 0x0f, 0x01,
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
//
// session.encryptInit(encryptionMechanism, baseKey);
// encryptedData = session.encrypt(data);
// System.out.println("Encrypted data: " + new String(Hex.encodeHex(encryptedData)));
session.closeSession();
pkcs11Module.finalize(null);
以下是运行上述代码时的相关输出：
Base key:
Object Class: Secret Key
Token: true
Private: true
Modifiable: true
Label: GP-3des-aba
Key Type: DES3
ID: <NULL_PTR>
Start Date: 00.00.0000 (DD.MM.YYYY)
End Date: 00.00.0000 (DD.MM.YYYY)
Derive: true
Local: false
Key Generation Mechanism: <Information unavailable>
Allowed Mechanisms: <NULL_PTR>
Sensitive: false
Encrypt: true
Decrypt: true
Sign: false
Verify: false
Wrap: true
Unwrap: true
Extractable: true
Always Sensitive: false
Never Extractable: false
Check Value: <Attribute not present>
Wrap With Trusted: <Attribute not present>
Trusted: <Attribute not present>
Wrap Template: <Attribute not present>
Unwrap Template: <Attribute not present>
Value (hex): 3d205b29fd04d989d0fd85d5f7b331d33d205b29fd04d989
################################################################################
derive key
Derivation Mechanism:
Mechanism: CKM_DES3_ECB
Parameters:
String data (hex): 008430953505f001
--------------------------------------------------------------------------------
01/18/13 14:12:10 CALL: entering (in Java_iaik_pkcs_pkcs11_wrapper_PKCS11Implementation_C_1DeriveKey)
[snip]
Derived key:
Object Class: Secret Key
Token: true
Private: false
Modifiable: true
Label: <NULL_PTR>
Key Type: DES
ID: <NULL_PTR>
Start Date: 00.00.0000 (DD.MM.YYYY)
End Date: 00.00.0000 (DD.MM.YYYY)
Derive: false
Local: false
Key Generation Mechanism: CKM_DES3_ECB
Allowed Mechanisms: <NULL_PTR>
Sensitive: false
Encrypt: false
Decrypt: false
Sign: false
Verify: false
Wrap: false
Unwrap: false
Extractable: true
Always Sensitive: false
Never Extractable: false
Check Value: <Attribute not present>
Wrap With Trusted: <Attribute not present>
Trusted: <Attribute not present>
Wrap Template: <Attribute not present>
Unwrap Template: <Attribute not present>
Value (hex): 3efe0eab6d3db397 <--- call to deriveKey() value incorrect
################################################################################
finished
01/18/13 14:12:12 CALL: entering (in Java_iaik_pkcs_pkcs11_wrapper_PKCS11Implementation_C_1EncryptInit)
01/18/13 14:12:12 CALL: exiting (in Java_iaik_pkcs_pkcs11_wrapper_PKCS11Implementation_C_1EncryptInit)
01/18/13 14:12:12 CALL: entering (in Java_iaik_pkcs_pkcs11_wrapper_PKCS11Implementation_C_1Encrypt)
01/18/13 14:12:12 CALL: exiting (in Java_iaik_pkcs_pkcs11_wrapper_PKCS11Implementation_C_1Encrypt)
Encrypted data: 3fff0faa6c3cb297 <--- call to encrypt() returns the expected value
解决方法:
事实证明,如果考虑DES奇偶校验如何工作,使用DeriveKey在HSM中生成的密钥和使用session.encrypt()生成的密钥字节基本相同.
DES密钥中每个字节的最低有效位是奇偶校验位,在许多实现中被忽略,并且不用作密钥的一部分,因此如果我在加密结果上正确设置奇偶校验位,则两个结果都匹配.
0x3efe0eab6d3db397< --- HSM生成的值具有正确的奇校验
00111110 11111110 00001110 10101011 01101101 00111101 10110011 10010111
0x3fff0faa6c3cb297< ---没有正确设置奇偶校验位的加密结果
00111111 11111111 00001111 10101010 01101100 00111100 10110010 10010111
标签：pkcs11,3des,java,hsm 来源： https://codeday.me/bug/20190729/1569376.html