Add function to extract key id from signatures

This does not support all possibilities of RFC4880, but it does
cover every key currently used in Arch Linux.

Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/libalpm/signing.h b/lib/libalpm/signing.h
index 42b60b1f..ce9edcdc 100644
--- a/lib/libalpm/signing.h
+++ b/lib/libalpm/signing.h
@@ -34,6 +34,9 @@ int _alpm_process_siglist(alpm_handle_t *handle, const char *identifier,
 int _alpm_key_in_keychain(alpm_handle_t *handle, const char *fpr);
 int _alpm_key_import(alpm_handle_t *handle, const char *fpr);
 
+int _alpm_extract_keyid(alpm_handle_t *handle, const char *identifier,
+		const unsigned char *sig, const size_t len, alpm_list_t **keys);
+
 #endif /* _ALPM_SIGNING_H */
 
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