commit dc6549f643c5d6ec666d49b238094991dd0174a8
author Fabio Utzig <utzig@apache.org> Sun Oct 31 10:57:23 2021 -0300
committer Fabio Utzig <utzig@utzig.org> Mon Nov 01 15:41:42 2021 -0300
tree 7b327df60200c7d05817789082d3e5418494b5a3
parent 56555f5f45008ce9f277a4c51c3d5593734752d1

Remove ec256 ASN1 signature padding

Old MCUboot releases required the ASN1 of ec256 signatures to be padded;
this was removed with:

https://github.com/mcu-tools/mcuboot/pull/680

After this change, it is possible to build EC-256 based signature
validation using Mbed TLS. This commit removes the padding and should
allow following releases to use Mbed TLS, instead of Tinycrypt.

Signed-off-by: Fabio Utzig <utzig@apache.org>

image/create.go

diff --git a/image/create.go b/image/create.go
index 0217f2c..82fd1c8 100644
--- a/image/create.go
+++ b/image/create.go
@@ -224,9 +224,6 @@
 		return nil, errors.Errorf("signature truncated")
 	}
 
-	pad := make([]byte, int(sigLen)-len(signature))
-	signature = append(signature, pad...)
-
 	return signature, nil
 }