pubkey

tools/gen_keys.py

@@ -1,6 +1,16 @@
 from ecdsa import SigningKey, NIST256p
+from ecdsa.util import randrange_from_seed__trytryagain
+import sys
+
+if len(sys.argv) > 1:
+    print('using input seed file ', sys.argv[1])
+    rng = open(sys.argv[1],'rb').read()
+    secexp = randrange_from_seed__trytryagain(rng, NIST256p.order)
+    sk = SigningKey.from_secret_exponent(secexp,curve = NIST256p)
+else:
+    sk = SigningKey.generate(curve = NIST256p)
+
 
-sk = SigningKey.generate(curve = NIST256p)
 
 sk_name = 'signing_key.pem'
 print('Signing key for signing device firmware: '+sk_name)