[PATCH] ssh signing: Support ECDSA as literal SSH keys

["Andy Lindeman via GitGitGadget" <gitgitgadget@gmail.com>]

From: Andy Lindeman <andy@lindeman.io>

Keys generated using `ssh-keygen -t ecdsa` or similar are being rejected
as literal SSH keys because the prefix is `ecdsa-sha2-nistp256`,
`ecdsa-sha2-nistp384` or `ecdsa-sha2-nistp521`.

This was acknowledged as an issue [1] in the past, but hasn't yet been
fixed.

[1]: https://github.com/git/git/pull/1041#issuecomment-971425601

Signed-off-by: Andy Lindeman <andy@lindeman.io>
---
    ssh signing: Support ECDSA as literal SSH keys
    
    Keys generated using ssh-keygen -t ecdsa or similar will currently be
    rejected as literal SSH keys because the prefix is ecdsa-sha2-nistp256,
    ecdsa-sha2-nistp384 or ecdsa-sha2-nistp521.
    
    This was acknowledged as an issue in the past, but hasn't yet been
    fixed.
    
    https://github.com/git/git/pull/1041#issuecomment-971425601

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1272%2Falindeman%2Fecdsa-sha2-keys-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1272/alindeman/ecdsa-sha2-keys-v1
Pull-Request: https://github.com/git/git/pull/1272

 gpg-interface.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gpg-interface.c b/gpg-interface.c
index 280f1fa1a58..086bd03b51d 100644
--- a/gpg-interface.c
+++ b/gpg-interface.c
@@ -779,7 +779,7 @@ static int is_literal_ssh_key(const char *string, const char **key)
 {
 	if (skip_prefix(string, "key::", key))
 		return 1;
-	if (starts_with(string, "ssh-")) {
+	if (starts_with(string, "ssh-") || starts_with(string, "ecdsa-sha2-")) {
 		*key = string;
 		return 1;
 	}

base-commit: 8ddf593a250e07d388059f7e3f471078e1d2ed5c
-- 
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