From 2a873fd4e1d53c45898b27e1c953b551b2cf6023 Mon Sep 17 00:00:00 2001
From: Mark Haines <mark.haines@matrix.org>
Date: Tue, 7 Jul 2015 09:50:32 +0100
Subject: Add functions for creating and verifying ed25519 signatures

---
 include/olm/crypto.hh | 39 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

(limited to 'include/olm')

diff --git a/include/olm/crypto.hh b/include/olm/crypto.hh
index 7f8f069..b845bfe 100644
--- a/include/olm/crypto.hh
+++ b/include/olm/crypto.hh
@@ -33,6 +33,18 @@ struct Curve25519KeyPair : public Curve25519PublicKey {
 };
 
 
+struct Ed25519PublicKey {
+    static const int LENGTH = 32;
+    std::uint8_t public_key[32];
+};
+
+
+struct Ed25519KeyPair : public Ed25519PublicKey {
+    static const int LENGTH = 64;
+    std::uint8_t private_key[32];
+};
+
+
 /** Generate a curve25519 key pair from 32 random bytes. */
 void curve25519_generate_key(
     std::uint8_t const * random_32_bytes,
@@ -61,7 +73,7 @@ void curve25519_sign(
 );
 
 
-/** Verify thei message using their public key.
+/** Verify their message using their public key.
  * The signature input buffer must be 64 bytes long.
  * Returns true if the signature is valid. */
 bool curve25519_verify(
@@ -70,6 +82,31 @@ bool curve25519_verify(
     std::uint8_t const * signature
 );
 
+/** Generate a curve25519 key pair from 32 random bytes. */
+void ed25519_generate_key(
+    std::uint8_t const * random_32_bytes,
+    Ed25519KeyPair & key_pair
+);
+
+
+/** Signs the message using our private key.
+ * The output buffer must be at least 64 bytes long. */
+void ed25519_sign(
+    Ed25519KeyPair const & our_key,
+    std::uint8_t const * message, std::size_t message_length,
+    std::uint8_t * output
+);
+
+
+/** Verify their message using their public key.
+ * The signature input buffer must be 64 bytes long.
+ * Returns true if the signature is valid. */
+bool ed25519_verify(
+    Ed25519PublicKey const & their_key,
+    std::uint8_t const * message, std::size_t message_length,
+    std::uint8_t const * signature
+);
+
 
 struct Aes256Key {
     static const int LENGTH = 32;
-- 
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