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-rw-r--r--include/cipher.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/cipher.h b/include/cipher.h
index d71a088f8..41271eba6 100644
--- a/include/cipher.h
+++ b/include/cipher.h
@@ -50,6 +50,7 @@
#define PUBKEY_USAGE_ENC 2 /* key is good for encryption */
#define PUBKEY_USAGE_CERT 4 /* key is also good to certify other keys*/
#define PUBKEY_USAGE_AUTH 8 /* key is good for authentication */
+#define PUBKEY_USAGE_UNKNOWN 128 /* key has an unknown usage bit */
#define DIGEST_ALGO_MD5 1
#define DIGEST_ALGO_SHA1 2