From 944fe4794e3056008a219d12735f52b823c85cad Mon Sep 17 00:00:00 2001
From: zzz <zzz@mail.i2p>
Date: Fri, 29 Mar 2019 12:54:12 +0000
Subject: [PATCH] Crypto: new SigContext (WIP) (proposal #148)
---
core/java/src/net/i2p/crypto/SigContext.java | 69 ++++++++++++++++++++
1 file changed, 69 insertions(+)
create mode 100644 core/java/src/net/i2p/crypto/SigContext.java
diff --git a/core/java/src/net/i2p/crypto/SigContext.java b/core/java/src/net/i2p/crypto/SigContext.java
new file mode 100644
index 0000000000..fa0d9dd989
--- /dev/null
+++ b/core/java/src/net/i2p/crypto/SigContext.java
@@ -0,0 +1,69 @@
+package net.i2p.crypto;
+
+import java.security.spec.AlgorithmParameterSpec;
+
+import net.i2p.data.DataHelper;
+
+/**
+ * Defines the context for signing with personalized hashes.
+ * See proposal 148.
+ *
+ * @since 0.9.40
+ */
+public enum SigContext {
+
+ SC_NONE (null),
+ SC_DATAGRAM ("sign_datagramI2P"),
+ SC_I2CP ("I2CP_SessionConf"),
+ SC_NETDB ("network_database"),
+ SC_NTCP ("NTCP_1_handshake"),
+ SC_SSU ("SSUHandshakeSign"),
+ SC_STREAMING("streaming_i2psig"),
+ SC_SU3 ("i2pSU3FileFormat"),
+ SC_TEST ("test1234test5678"),
+
+ ;
+
+ private final SigContextSpec spec;
+
+ /**
+ * The 16 bytes for this type, or null for none
+ */
+ SigContext(String p) {
+ spec = new SigContextSpec(p);
+ }
+
+ /**
+ * The AlgorithmParameterSpec.
+ * Pass this as an argument in setParameter()
+ * to the Blake sign/verify engines.
+ */
+ public SigContextSpec getSpec() { return spec; }
+
+ /**
+ * The AlgorithmParameterSpec.
+ * Pass this as an argument in setParameter()
+ * to the Blake sign/verify engines.
+ */
+ public static class SigContextSpec implements AlgorithmParameterSpec {
+ private final byte[] b;
+
+ /**
+ * The 16 bytes for this type, or null for none
+ */
+ public SigContextSpec(String p) {
+ if (p != null) {
+ b = DataHelper.getASCII(p);
+ if (b.length != 16)
+ throw new IllegalArgumentException();
+ } else {
+ b = null;
+ }
+ }
+
+ /**
+ * The 16 bytes for this type, or null for none
+ */
+ public byte[] getData() { return b; }
+ }
+}
--
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