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Upgraded hash function to SHA-384 and MAC to HMAC-SHA-384.

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This matches the security level of AES-256 according to NSA Suite B. To
better comply with Suite B we should replace the combination of CTR mode
and HMAC with GCM, which would reduce the MAC size from 48 to 16 bytes.
This commit is contained in:
akwizgran
2012-02-22 13:17:07 +00:00
parent a9d91beaaa
commit 34cd8cddc3
10 changed files with 19 additions and 15 deletions
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6
api/net/sf/briar/api/protocol/ProtocolConstants.java
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@@ -22,13 +22,13 @@ public interface ProtocolConstants {
static final int MAX_PROPERTY_LENGTH = 100;
/** The maximum number of groups a node may subscribe to. */
static final int MAX_GROUPS = 6000;
static final int MAX_GROUPS = 5000;
/** The maximum length of a group's name in UTF-8 bytes. */
static final int MAX_GROUP_NAME_LENGTH = 50;
/** The maximum length of a public key in bytes. */
static final int MAX_PUBLIC_KEY_LENGTH = 100;
static final int MAX_PUBLIC_KEY_LENGTH = 120;
/** The maximum length of an author's name in UTF-8 bytes. */
static final int MAX_AUTHOR_NAME_LENGTH = 50;
@@ -44,7 +44,7 @@ public interface ProtocolConstants {
static final int MAX_SUBJECT_LENGTH = 100;
/** The maximum length of a signature in bytes. */
static final int MAX_SIGNATURE_LENGTH = 100;
static final int MAX_SIGNATURE_LENGTH = 120;
/** The length of a message's random salt in bytes. */
static final int SALT_LENGTH = 8;

4
api/net/sf/briar/api/protocol/UniqueId.java
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@@ -5,14 +5,14 @@ import java.util.Arrays;
public abstract class UniqueId {
/** The length of a unique identifier in bytes. */
public static final int LENGTH = 32;
public static final int LENGTH = 48;
protected final byte[] id;
private int hashCode = -1;
protected UniqueId(byte[] id) {
assert id.length == LENGTH;
if(id.length != LENGTH) throw new IllegalArgumentException();
this.id = id;
}

2
api/net/sf/briar/api/transport/TransportConstants.java
View File

@@ -12,7 +12,7 @@ public interface TransportConstants {
static final int FRAME_HEADER_LENGTH = 9;
/** The length of the MAC in bytes. */
static final int MAC_LENGTH = 32;
static final int MAC_LENGTH = 48;
/**
* The minimum connection length in bytes that all transport plugins must