tests/sshserver.pl: use RSA instead of DSA for host auth

DSA is no longer supported by OpenSSH 7.0, which causes all SCP/SFTP
test cases to be skipped.  Using RSA for host authentication works with
both old and new versions of OpenSSH.

Reported-by: Karlson2k

Closes #676

tests/.gitignore

@@ -3,8 +3,8 @@ configurehelp.pm
 curl_client_key
 curl_client_key.pub
 curl_client_knownhosts
-curl_host_dsa_key
-curl_host_dsa_key.pub
+curl_host_rsa_key
+curl_host_rsa_key.pub
 curl_sftp_cmds
 curl_sftp_config
 curl_ssh_config

tests/sshhelp.pm

@@ -120,8 +120,8 @@ $sshlog          = undef;                    # ssh client log file
 $sftplog         = undef;                    # sftp client log file
 $sftpcmds        = 'curl_sftp_cmds';         # sftp client commands batch file
 $knownhosts      = 'curl_client_knownhosts'; # ssh knownhosts file
-$hstprvkeyf      = 'curl_host_dsa_key';      # host private key file
-$hstpubkeyf      = 'curl_host_dsa_key.pub';  # host public key file
+$hstprvkeyf      = 'curl_host_rsa_key';      # host private key file
+$hstpubkeyf      = 'curl_host_rsa_key.pub';  # host public key file
 $cliprvkeyf      = 'curl_client_key';        # client private key file
 $clipubkeyf      = 'curl_client_key.pub';    # client public key file
 

tests/sshserver.pl

@@ -371,12 +371,12 @@ if((! -e $hstprvkeyf) || (! -s $hstprvkeyf) ||
     # Make sure all files are gone so ssh-keygen doesn't complain
     unlink($hstprvkeyf, $hstpubkeyf, $cliprvkeyf, $clipubkeyf);
     logmsg 'generating host keys...' if($verbose);
-    if(system "\"$sshkeygen\" -q -t dsa -f $hstprvkeyf -C 'curl test server' -N ''") {
+    if(system "\"$sshkeygen\" -q -t rsa -f $hstprvkeyf -C 'curl test server' -N ''") {
         logmsg 'Could not generate host key';
         exit 1;
     }
     logmsg 'generating client keys...' if($verbose);
-    if(system "\"$sshkeygen\" -q -t dsa -f $cliprvkeyf -C 'curl test client' -N ''") {
+    if(system "\"$sshkeygen\" -q -t rsa -f $cliprvkeyf -C 'curl test client' -N ''") {
         logmsg 'Could not generate client key';
         exit 1;
     }
@@ -729,11 +729,11 @@ if(system "\"$sshd\" -t -f $sshdconfig > $sshdlog 2>&1") {
 if((! -e $knownhosts) || (! -s $knownhosts)) {
     logmsg 'generating ssh client known hosts file...' if($verbose);
     unlink($knownhosts);
-    if(open(DSAKEYFILE, "<$hstpubkeyf")) {
-        my @dsahostkey = do { local $/ = ' '; <DSAKEYFILE> };
-        if(close(DSAKEYFILE)) {
+    if(open(RSAKEYFILE, "<$hstpubkeyf")) {
+        my @rsahostkey = do { local $/ = ' '; <RSAKEYFILE> };
+        if(close(RSAKEYFILE)) {
             if(open(KNOWNHOSTS, ">$knownhosts")) {
-                print KNOWNHOSTS "$listenaddr ssh-dss $dsahostkey[1]\n";
+                print KNOWNHOSTS "$listenaddr ssh-rsa $rsahostkey[1]\n";
                 if(!close(KNOWNHOSTS)) {
                     $error = "Error: cannot close file $knownhosts";
                 }