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Code Issues Releases Wiki Activity

Use static linked lists instead of arrays

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This commit is contained in:
Dominik Schürmann 2015-03-05 17:24:56 +01:00
parent 0300bce41f
commit aeb0169f02
6 changed files with 53 additions and 35 deletions
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7
OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/CanonicalizedSecretKey.java
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@ -180,15 +180,10 @@ public class CanonicalizedSecretKey extends CanonicalizedPublicKey {
* Returns a list of all supported hash algorithms.
*/
public LinkedList<Integer> getSupportedHashAlgorithms() {
LinkedList<Integer> supported = new LinkedList<>();
// TODO: intersection between preferred hash algos of this key and PgpConstants.PREFERRED_HASH_ALGORITHMS
// choose best algo
for (int currentInt : PgpConstants.PREFERRED_HASH_ALGORITHMS) {
supported.add(currentInt);
}
return supported;
return PgpConstants.sPreferredHashAlgorithms;
}
private PGPContentSignerBuilder getContentSignerBuilder(int hashAlgo, byte[] nfcSignedHash,

66
OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpConstants.java
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@ -4,6 +4,8 @@ import org.spongycastle.bcpg.CompressionAlgorithmTags;
import org.spongycastle.bcpg.HashAlgorithmTags;
import org.spongycastle.bcpg.SymmetricKeyAlgorithmTags;
import java.util.LinkedList;
public class PgpConstants {
public static interface OpenKeychainSymmetricKeyAlgorithmTags extends SymmetricKeyAlgorithmTags {
@ -18,27 +20,45 @@ public class PgpConstants {
public static final int USE_PREFERRED = -1;
}
// most preferred is first
public static final int[] PREFERRED_SYMMETRIC_ALGORITHMS = new int[]{
SymmetricKeyAlgorithmTags.AES_256,
SymmetricKeyAlgorithmTags.AES_192,
SymmetricKeyAlgorithmTags.AES_128,
SymmetricKeyAlgorithmTags.TWOFISH
};
/*
* Most preferred is first
* These arrays are written as preferred algorithms into the keys on creation.
* Other implementations may choose to honor this selection.
*
* These lists also define the only algorithms which are used in OpenKeychain.
* We do not support algorithms such as MD5
*/
public static final int[] PREFERRED_HASH_ALGORITHMS = new int[]{
HashAlgorithmTags.SHA256,
HashAlgorithmTags.SHA512,
HashAlgorithmTags.SHA384,
HashAlgorithmTags.SHA224,
HashAlgorithmTags.RIPEMD160
};
public static LinkedList<Integer> sPreferredSymmetricAlgorithms = new LinkedList<>();
public static LinkedList<Integer> sPreferredHashAlgorithms = new LinkedList<>();
public static LinkedList<Integer> sPreferredCompressionAlgorithms = new LinkedList<>();
public static final int[] PREFERRED_COMPRESSION_ALGORITHMS = new int[]{
CompressionAlgorithmTags.ZLIB,
CompressionAlgorithmTags.BZIP2,
CompressionAlgorithmTags.ZIP
};
static {
sPreferredSymmetricAlgorithms.add(SymmetricKeyAlgorithmTags.AES_256);
sPreferredSymmetricAlgorithms.add(SymmetricKeyAlgorithmTags.AES_192);
sPreferredSymmetricAlgorithms.add(SymmetricKeyAlgorithmTags.AES_128);
sPreferredSymmetricAlgorithms.add(SymmetricKeyAlgorithmTags.TWOFISH);
// NOTE: some implementations do not support SHA512, thus we choose SHA256 as default (Mailvelope?)
sPreferredHashAlgorithms.add(HashAlgorithmTags.SHA256);
sPreferredHashAlgorithms.add(HashAlgorithmTags.SHA512);
sPreferredHashAlgorithms.add(HashAlgorithmTags.SHA384);
sPreferredHashAlgorithms.add(HashAlgorithmTags.SHA224);
sPreferredHashAlgorithms.add(HashAlgorithmTags.SHA1);
sPreferredHashAlgorithms.add(HashAlgorithmTags.RIPEMD160);
sPreferredCompressionAlgorithms.add(CompressionAlgorithmTags.ZLIB);
sPreferredCompressionAlgorithms.add(CompressionAlgorithmTags.BZIP2);
sPreferredCompressionAlgorithms.add(CompressionAlgorithmTags.ZIP);
}
public static int[] getAsArray(LinkedList<Integer> list) {
int[] array = new int[list.size()];
for (int i = 0; i < list.size(); i++) {
array[i] = list.get(i); // Watch out for NullPointerExceptions!
}
return array;
}
/*
* Note: s2kcount is a number between 0 and 0xff that controls the
@ -55,15 +75,15 @@ public class PgpConstants {
* from http://kbsriram.com/2013/01/generating-rsa-keys-with-bouncycastle.html
*
* Bouncy Castle default: 0x60
* kbsriram proposes 0xc0
* we use 0x90, a good trade-off between usability and security against offline attacks
* kbsriram proposes: 0xc0
* OpenKeychain: 0x90
*/
public static final int SECRET_KEY_ENCRYPTOR_S2K_COUNT = 0x90;
public static final int SECRET_KEY_ENCRYPTOR_HASH_ALGO = HashAlgorithmTags.SHA256;
public static final int SECRET_KEY_ENCRYPTOR_SYMMETRIC_ALGO = SymmetricKeyAlgorithmTags.AES_256;
public static final int SECRET_KEY_SIGNATURE_HASH_ALGO = HashAlgorithmTags.SHA256;
// NOTE: only SHA1 is supported for key checksum calculations.
// NOTE: only SHA1 is supported for key checksum calculations in OpenPGP,
// see http://tools.ietf.org/html/rfc488 0#section-5.5.3
public static final int SECRET_KEY_SIGNATURE_CHECKSUM_HASH_ALGO = HashAlgorithmTags.SHA1;
}

9
OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpKeyOperation.java
View File

@ -1213,9 +1213,12 @@ public class PgpKeyOperation {
* error than be ignored.
*/
/* non-critical subpackets: */
hashedPacketsGen.setPreferredSymmetricAlgorithms(false, PgpConstants.PREFERRED_SYMMETRIC_ALGORITHMS);
hashedPacketsGen.setPreferredHashAlgorithms(false, PgpConstants.PREFERRED_HASH_ALGORITHMS);
hashedPacketsGen.setPreferredCompressionAlgorithms(false, PgpConstants.PREFERRED_COMPRESSION_ALGORITHMS);
hashedPacketsGen.setPreferredSymmetricAlgorithms(false,
PgpConstants.getAsArray(PgpConstants.sPreferredSymmetricAlgorithms));
hashedPacketsGen.setPreferredHashAlgorithms(false,
PgpConstants.getAsArray(PgpConstants.sPreferredHashAlgorithms));
hashedPacketsGen.setPreferredCompressionAlgorithms(false,
PgpConstants.getAsArray(PgpConstants.sPreferredCompressionAlgorithms));
hashedPacketsGen.setPrimaryUserID(false, primary);
/* critical subpackets: we consider those important for a modern pgp implementation */

2
OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpSignEncryptOperation.java
View File

@ -227,7 +227,7 @@ public class PgpSignEncryptOperation extends BaseOperation {
if (algo == PgpConstants.OpenKeychainSymmetricKeyAlgorithmTags.USE_PREFERRED) {
// get most preferred
// TODO: get from recipients
algo = PgpConstants.PREFERRED_SYMMETRIC_ALGORITHMS[0];
algo = PgpConstants.sPreferredSymmetricAlgorithms.getFirst();
}
// has Integrity packet enabled!
JcePGPDataEncryptorBuilder encryptorBuilder =

2
OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptFilesActivity.java
View File

@ -205,7 +205,7 @@ public class EncryptFilesActivity extends EncryptActivity implements EncryptActi
data.addOutputUris(mOutputUris);
if (mUseCompression) {
data.setCompressionId(CompressionAlgorithmTags.ZLIB);
data.setCompressionId(PgpConstants.sPreferredCompressionAlgorithms.getFirst());
} else {
data.setCompressionId(CompressionAlgorithmTags.UNCOMPRESSED);
}

2
OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptTextActivity.java
View File

@ -198,7 +198,7 @@ public class EncryptTextActivity extends EncryptActivity implements EncryptActiv
data.setCleartextSignature(true);
if (mUseCompression) {
data.setCompressionId(CompressionAlgorithmTags.ZLIB);
data.setCompressionId(PgpConstants.sPreferredCompressionAlgorithms.getFirst());
} else {
data.setCompressionId(CompressionAlgorithmTags.UNCOMPRESSED);
}