progs/*.1: Mention the default hash for `ed25519',

[catacomb] / progs / catsign.1

diff --git a/progs/catsign.1 b/progs/catsign.1
index 7435dbf..3aed8ed 100644 (file)
--- a/progs/catsign.1
+++ b/progs/catsign.1
@@ -246,6 +246,22 @@ command (see
 .BR key (1))
 to generate the key.
 .TP
+.B ed25519
+This is Bernstein, Duif, Lange, Schwabe, and Yang's Ed25519 algorithm.
+More specifically, this is HashEd25519
+using the selected
+.B hash
+algorithm \(en by default
+.BR sha512 .
+Use the
+.B ed25519
+algorithm of the
+.B key add
+command
+(see
+.BR key (1))
+to generate the key.
+.TP
 .B mac
 This uses a symmetric message-authentication algorithm rather than a
 digital signature.  The precise message-authentication scheme used is
@@ -285,6 +301,10 @@ and
 .BR eckcdsa ,
 the default hash function is
 .BR has160 .
+For
+.BR ed25519 ,
+the default hash function is
+.BR sha512 .
 .PP
 Run
 .B catsign show hash