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More sinks for java/ql/src/experimental/Security/CWE/CWE-208/NonConstantTimeCryptoComparison.ql

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This commit is contained in:
Artem Smotrakov
2021-06-17 19:33:37 +02:00
committed by Fosstars
parent dfa3b523d0
commit 8e6d227dc0
3 changed files with 188 additions and 54 deletions
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46
java/ql/test/experimental/query-tests/security/CWE-208/NonConstantTimeCryptoComparison.expected
View File

@@ -1,21 +1,41 @@
edges
| NonConstantTimeCryptoComparison.java:15:28:15:44 | doFinal(...) : byte[] | NonConstantTimeCryptoComparison.java:16:43:16:51 | actualMac |
| NonConstantTimeCryptoComparison.java:23:28:23:44 | doFinal(...) : byte[] | NonConstantTimeCryptoComparison.java:24:58:24:66 | actualMac : byte[] |
| NonConstantTimeCryptoComparison.java:24:58:24:66 | actualMac : byte[] | NonConstantTimeCryptoComparison.java:24:53:24:67 | cast(...) |
| NonConstantTimeCryptoComparison.java:16:28:16:44 | doFinal(...) : byte[] | NonConstantTimeCryptoComparison.java:17:43:17:51 | actualMac |
| NonConstantTimeCryptoComparison.java:23:28:23:44 | doFinal(...) : byte[] | NonConstantTimeCryptoComparison.java:24:84:24:92 | actualMac : byte[] |
| NonConstantTimeCryptoComparison.java:24:84:24:92 | actualMac : byte[] | NonConstantTimeCryptoComparison.java:24:66:24:93 | castToObjectArray(...) |
| NonConstantTimeCryptoComparison.java:31:21:31:29 | actualMac : byte[] | NonConstantTimeCryptoComparison.java:32:43:32:51 | actualMac |
| NonConstantTimeCryptoComparison.java:47:28:47:40 | sign(...) : byte[] | NonConstantTimeCryptoComparison.java:48:40:48:48 | signature |
| NonConstantTimeCryptoComparison.java:64:22:64:46 | doFinal(...) : byte[] | NonConstantTimeCryptoComparison.java:65:45:65:47 | tag |
| NonConstantTimeCryptoComparison.java:56:21:56:29 | signature : byte[] | NonConstantTimeCryptoComparison.java:57:40:57:48 | signature |
| NonConstantTimeCryptoComparison.java:73:22:73:46 | doFinal(...) : byte[] | NonConstantTimeCryptoComparison.java:74:45:74:47 | tag |
| NonConstantTimeCryptoComparison.java:83:24:83:26 | tag : byte[] | NonConstantTimeCryptoComparison.java:84:40:84:42 | tag |
| NonConstantTimeCryptoComparison.java:93:52:93:54 | tag : ByteBuffer | NonConstantTimeCryptoComparison.java:94:40:94:50 | array(...) |
| NonConstantTimeCryptoComparison.java:103:52:103:54 | tag : ByteBuffer | NonConstantTimeCryptoComparison.java:104:49:104:51 | tag |
nodes
| NonConstantTimeCryptoComparison.java:15:28:15:44 | doFinal(...) : byte[] | semmle.label | doFinal(...) : byte[] |
| NonConstantTimeCryptoComparison.java:16:43:16:51 | actualMac | semmle.label | actualMac |
| NonConstantTimeCryptoComparison.java:16:28:16:44 | doFinal(...) : byte[] | semmle.label | doFinal(...) : byte[] |
| NonConstantTimeCryptoComparison.java:17:43:17:51 | actualMac | semmle.label | actualMac |
| NonConstantTimeCryptoComparison.java:23:28:23:44 | doFinal(...) : byte[] | semmle.label | doFinal(...) : byte[] |
| NonConstantTimeCryptoComparison.java:24:53:24:67 | cast(...) | semmle.label | cast(...) |
| NonConstantTimeCryptoComparison.java:24:58:24:66 | actualMac : byte[] | semmle.label | actualMac : byte[] |
| NonConstantTimeCryptoComparison.java:24:66:24:93 | castToObjectArray(...) | semmle.label | castToObjectArray(...) |
| NonConstantTimeCryptoComparison.java:24:84:24:92 | actualMac : byte[] | semmle.label | actualMac : byte[] |
| NonConstantTimeCryptoComparison.java:31:21:31:29 | actualMac : byte[] | semmle.label | actualMac : byte[] |
| NonConstantTimeCryptoComparison.java:32:43:32:51 | actualMac | semmle.label | actualMac |
| NonConstantTimeCryptoComparison.java:47:28:47:40 | sign(...) : byte[] | semmle.label | sign(...) : byte[] |
| NonConstantTimeCryptoComparison.java:48:40:48:48 | signature | semmle.label | signature |
| NonConstantTimeCryptoComparison.java:64:22:64:46 | doFinal(...) : byte[] | semmle.label | doFinal(...) : byte[] |
| NonConstantTimeCryptoComparison.java:65:45:65:47 | tag | semmle.label | tag |
| NonConstantTimeCryptoComparison.java:56:21:56:29 | signature : byte[] | semmle.label | signature : byte[] |
| NonConstantTimeCryptoComparison.java:57:40:57:48 | signature | semmle.label | signature |
| NonConstantTimeCryptoComparison.java:73:22:73:46 | doFinal(...) : byte[] | semmle.label | doFinal(...) : byte[] |
| NonConstantTimeCryptoComparison.java:74:45:74:47 | tag | semmle.label | tag |
| NonConstantTimeCryptoComparison.java:83:24:83:26 | tag : byte[] | semmle.label | tag : byte[] |
| NonConstantTimeCryptoComparison.java:84:40:84:42 | tag | semmle.label | tag |
| NonConstantTimeCryptoComparison.java:93:52:93:54 | tag : ByteBuffer | semmle.label | tag : ByteBuffer |
| NonConstantTimeCryptoComparison.java:94:40:94:50 | array(...) | semmle.label | array(...) |
| NonConstantTimeCryptoComparison.java:103:52:103:54 | tag : ByteBuffer | semmle.label | tag : ByteBuffer |
| NonConstantTimeCryptoComparison.java:104:49:104:51 | tag | semmle.label | tag |
#select
| NonConstantTimeCryptoComparison.java:16:43:16:51 | actualMac | NonConstantTimeCryptoComparison.java:15:28:15:44 | doFinal(...) : byte[] | NonConstantTimeCryptoComparison.java:16:43:16:51 | actualMac | Using a non-constant time algorithm for comparing results of a cryptographic operation. |
| NonConstantTimeCryptoComparison.java:24:53:24:67 | cast(...) | NonConstantTimeCryptoComparison.java:23:28:23:44 | doFinal(...) : byte[] | NonConstantTimeCryptoComparison.java:24:53:24:67 | cast(...) | Using a non-constant time algorithm for comparing results of a cryptographic operation. |
| NonConstantTimeCryptoComparison.java:17:43:17:51 | actualMac | NonConstantTimeCryptoComparison.java:16:28:16:44 | doFinal(...) : byte[] | NonConstantTimeCryptoComparison.java:17:43:17:51 | actualMac | Using a non-constant time algorithm for comparing results of a cryptographic operation. |
| NonConstantTimeCryptoComparison.java:24:66:24:93 | castToObjectArray(...) | NonConstantTimeCryptoComparison.java:23:28:23:44 | doFinal(...) : byte[] | NonConstantTimeCryptoComparison.java:24:66:24:93 | castToObjectArray(...) | Using a non-constant time algorithm for comparing results of a cryptographic operation. |
| NonConstantTimeCryptoComparison.java:32:43:32:51 | actualMac | NonConstantTimeCryptoComparison.java:31:21:31:29 | actualMac : byte[] | NonConstantTimeCryptoComparison.java:32:43:32:51 | actualMac | Using a non-constant time algorithm for comparing results of a cryptographic operation. |
| NonConstantTimeCryptoComparison.java:48:40:48:48 | signature | NonConstantTimeCryptoComparison.java:47:28:47:40 | sign(...) : byte[] | NonConstantTimeCryptoComparison.java:48:40:48:48 | signature | Using a non-constant time algorithm for comparing results of a cryptographic operation. |
| NonConstantTimeCryptoComparison.java:65:45:65:47 | tag | NonConstantTimeCryptoComparison.java:64:22:64:46 | doFinal(...) : byte[] | NonConstantTimeCryptoComparison.java:65:45:65:47 | tag | Using a non-constant time algorithm for comparing results of a cryptographic operation. |
| NonConstantTimeCryptoComparison.java:57:40:57:48 | signature | NonConstantTimeCryptoComparison.java:56:21:56:29 | signature : byte[] | NonConstantTimeCryptoComparison.java:57:40:57:48 | signature | Using a non-constant time algorithm for comparing results of a cryptographic operation. |
| NonConstantTimeCryptoComparison.java:74:45:74:47 | tag | NonConstantTimeCryptoComparison.java:73:22:73:46 | doFinal(...) : byte[] | NonConstantTimeCryptoComparison.java:74:45:74:47 | tag | Using a non-constant time algorithm for comparing results of a cryptographic operation. |
| NonConstantTimeCryptoComparison.java:84:40:84:42 | tag | NonConstantTimeCryptoComparison.java:83:24:83:26 | tag : byte[] | NonConstantTimeCryptoComparison.java:84:40:84:42 | tag | Using a non-constant time algorithm for comparing results of a cryptographic operation. |
| NonConstantTimeCryptoComparison.java:94:40:94:50 | array(...) | NonConstantTimeCryptoComparison.java:93:52:93:54 | tag : ByteBuffer | NonConstantTimeCryptoComparison.java:94:40:94:50 | array(...) | Using a non-constant time algorithm for comparing results of a cryptographic operation. |
| NonConstantTimeCryptoComparison.java:104:49:104:51 | tag | NonConstantTimeCryptoComparison.java:103:52:103:54 | tag : ByteBuffer | NonConstantTimeCryptoComparison.java:104:49:104:51 | tag | Using a non-constant time algorithm for comparing results of a cryptographic operation. |

69
java/ql/test/experimental/query-tests/security/CWE-208/NonConstantTimeCryptoComparison.java
View File

@@ -1,3 +1,4 @@
import java.nio.ByteBuffer;
import java.security.Key;
import java.security.MessageDigest;
import java.security.PrivateKey;
@@ -10,26 +11,25 @@ import javax.crypto.Mac;
public class NonConstantTimeCryptoComparison {
// BAD: compare MACs using a non-constant time method
public boolean unsafeMacCheck(byte[] expectedMac, byte[] data) throws Exception {
public boolean unsafeMacCheckWithArrayEquals(byte[] expectedMac, byte[] data) throws Exception {
Mac mac = Mac.getInstance("HmacSHA256");
byte[] actualMac = mac.doFinal(data);
return Arrays.equals(expectedMac, actualMac);
}
// BAD: compare MACs using a non-constant time method
public boolean unsafeMacCheckWithArraysDeepEquals(byte[] expectedMac, byte[] data) throws Exception {
Mac mac = Mac.getInstance("HmacSHA256");
byte[] actualMac = mac.doFinal(data);
return Arrays.deepEquals(cast(expectedMac), cast(actualMac));
return Arrays.deepEquals(castToObjectArray(expectedMac), castToObjectArray(actualMac));
}
private static Object[] cast(byte[] array) {
Object[] result = new Object[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = array[i];
}
return result;
// BAD: compare MACs using a non-constant time method
public boolean unsafeMacCheckWithDoFinalWithOutputArray(byte[] expectedMac, byte[] data) throws Exception {
Mac mac = Mac.getInstance("HmacSHA256");
byte[] actualMac = new byte[256];
mac.doFinal(actualMac, 0);
return Arrays.equals(expectedMac, actualMac);
}
// GOOD: compare MACs using a constant time method
@@ -48,6 +48,15 @@ public class NonConstantTimeCryptoComparison {
return Arrays.equals(expected, signature);
}
// BAD: compare signatures using a non-constant time method
public boolean unsafeCheckSignaturesWithOutputArray(byte[] expected, byte[] data, PrivateKey key) throws Exception {
Signature engine = Signature.getInstance("SHA256withRSA");
engine.initSign(key);
byte[] signature = new byte[1024];
engine.sign(signature, 0, 1024);
return Arrays.equals(expected, signature);
}
// GOOD: compare signatures using a constant time method
public boolean saferCheckSignatures(byte[] expected, byte[] data, PrivateKey key) throws Exception {
Signature engine = Signature.getInstance("SHA256withRSA");
@@ -58,19 +67,57 @@ public class NonConstantTimeCryptoComparison {
}
// BAD: compare ciphertexts using a non-constant time method
public boolean unsafeCheckCustomMac(byte[] expected, byte[] plaintext, Key key) throws Exception {
public boolean unsafeCheckCiphertext(byte[] expected, byte[] plaintext, Key key) throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] tag = cipher.doFinal(plaintext);
return Objects.deepEquals(expected, tag);
}
// BAD: compare ciphertexts using a non-constant time method
public boolean unsafeCheckCiphertextWithOutputArray(byte[] expected, byte[] plaintext, Key key) throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, key);
cipher.update(plaintext);
byte[] tag = new byte[1024];
cipher.doFinal(tag, 0);
return Arrays.equals(expected, tag);
}
// BAD: compare ciphertexts using a non-constant time method
public boolean unsafeCheckCiphertextWithByteBuffer(byte[] expected, byte[] plaintext, Key key) throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, key);
cipher.update(plaintext);
ByteBuffer tag = ByteBuffer.wrap(new byte[1024]);
cipher.doFinal(ByteBuffer.wrap(plaintext), tag);
return Arrays.equals(expected, tag.array());
}
// BAD: compare ciphertexts using a non-constant time method
public boolean unsafeCheckCiphertextWithByteBufferEquals(byte[] expected, byte[] plaintext, Key key) throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, key);
cipher.update(plaintext);
ByteBuffer tag = ByteBuffer.wrap(new byte[1024]);
cipher.doFinal(ByteBuffer.wrap(plaintext), tag);
return ByteBuffer.wrap(expected).equals(tag);
}
// GOOD: compare ciphertexts using a constant time method
public boolean saferCheckCustomMac(byte[] expected, byte[] plaintext, Key key) throws Exception {
public boolean saferCheckCiphertext(byte[] expected, byte[] plaintext, Key key) throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] tag = cipher.doFinal(plaintext);
return MessageDigest.isEqual(expected, tag);
}
private static Object[] castToObjectArray(byte[] array) {
Object[] result = new Object[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = array[i];
}
return result;
}
}