commit 76528c440626f466f68a53b4343238ab03aef759
author David Brown <david.brown@linaro.org> Tue Sep 05 11:18:35 2017 -0600
committer David Brown <davidb@davidb.org> Wed Sep 06 16:16:58 2017 -0600
tree e564e868efc345d9165b43de4697c77a02a4265b
parent d36e91acc15e84521a116ffe7a1874911aa36180

imgtool: Add rust language support to ECDSA

Generate rust code for ECDSA signatures, when requested (rather than
raising an exception)

Signed-off-by: David Brown <david.brown@linaro.org>

scripts/imgtool/keys.py

diff --git a/scripts/imgtool/keys.py b/scripts/imgtool/keys.py
index fddfec9..4f6e6be 100644
--- a/scripts/imgtool/keys.py
+++ b/scripts/imgtool/keys.py
@@ -115,6 +115,19 @@
         print("\n};")
         print("const unsigned int ecdsa_pub_key_len = {};".format(len(encoded)))
 
+    def emit_rust(self):
+        vk = self.key.get_verifying_key()
+        print(AUTOGEN_MESSAGE)
+        print("static ECDSA_PUB_KEY: &'static [u8] = &[", end='')
+        encoded = bytes(vk.to_der())
+        for count, b in enumerate(encoded):
+            if count % 8 == 0:
+                print("\n    ", end='')
+            else:
+                print(" ", end='')
+            print("0x{:02x},".format(b), end='')
+        print("\n];")
+
     def sign(self, payload):
         # To make this fixed length, possibly pad with zeros.
         sig = self.key.sign(payload, hashfunc=hashlib.sha256, sigencode=util.sigencode_der)