manual: Change instructions for creating RSA keys.

Decribe how to create an rsa key with ssh-keygen instead of
"openssl genrsa".

diff --git a/web/manual.m4 b/web/manual.m4
index 30fe922f63bd6fab3ffd86ca4f2653dc0423bf1c..97c5a37ddb331f4e2304d40426f5274109594ffe 100644 (file)
--- a/web/manual.m4
+++ b/web/manual.m4
@@ -311,7 +311,7 @@ following commands:
 
        user=bar
        target=~/.paraslash/server.users
-       key=~/.paraslash/key.pub.$user
+       key=~/.paraslash/id_rsa.pub.$user
        perms=AFS_READ,AFS_WRITE,VSS_READ,VSS_WRITE
        mkdir -p ~/.paraslash
        echo "user $user $key $perms" >> $target
@@ -319,20 +319,25 @@ following commands:
 Next, change to the "bar" account on client_host and generate the
 key pair with the commands
 
-       key=~/.paraslash/key.$LOGNAME
-       mkdir -p ~/.paraslash
-       (umask 077 && openssl genrsa -out $key 2048)
+       ssh-keygen -t rsa -b 2048
+       # hit enter twice to create a key with no passphrase
 
-para_server only needs to know the public key of the key pair just
-created. It can be extracted with
+This generates the two files id_rsa and id_rsa.pub in ~/.ssh. Note
+that paraslash can also read keys generated by the "openssl genrsa"
+command. However, since keys created with ssh-keygen can also be used
+for ssh, this method is recommended.
 
-       pubkey=~/.paraslash/key.pub.$LOGNAME
-       openssl rsa -in $key -pubout -out $pubkey
+Note that para_server refuses to use a key if it is shorter than 2048
+bits. In particular, the RSA keys of paraslash 0.3.x will not work
+with version 0.4.x. Moreover, para_client refuses to use a (private)
+key which is world-readable.
 
-Copy the public key just created to server_host (you may skip this step
-for a single-user setup, i.e. if foo=bar and server_host=client_host):
+para_server only needs to know the public key of the key pair just
+created. Copy this public key to server_host:
 
-       scp $pubkey foo@server_host:.paraslash/
+       src=~/.ssh/id_rsa.pub
+       dest=.paraslash/id_rsa.pub.$LOGNAME
+       scp $src foo@server_host:$dest
 
 Finally, tell para_client to connect to server_host:
 
@@ -564,19 +569,6 @@ execute. The output of
 contains in the third column the permissions needed to execute the
 command.
 
-A new RSA key can be created with
-
-       openssl genrsa -out <private_key> 2048
-
-and the public part may be extracted with
-
-       openssl rsa -in <private_key> -pubout -out <public_key>
-
-Note that para_server refuses to use a key if it is shorter than 2048
-bits. In particular, the RSA keys of paraslash 0.3.x will not work
-with version 0.4.x. Moreover, para_client refuses to use a (private)
-key which is world-readable.
-
 It is possible to make para_server reread the user_list file by
 executing the paraslash "hup" command or by sending SIGHUP to the
 PID of para_server.