Merge branch 'nick/ssh/sign-verify-binary' into maint-r14

* nick/ssh/sign-verify-binary:
  Updated appup file.
  Updated notes file.
  Changed year in copyright header.
  Added updated modules to the appup file.
  Improved error handling for ssh:connect/3/4.
  Release note contained wrong ticker number.
  OTP-8987 In some cases SSH returned {error, normal} when a channel was terminated unexpectedly. This has now been changed to {error, channel_closed}.

1 files changed, 47 insertions, 2 deletions

diff --git a/lib/ssh/src/ssh.erl b/lib/ssh/src/ssh.erl
index 994c77436a..cada109df0 100644
--- a/lib/ssh/src/ssh.erl
+++ b/lib/ssh/src/ssh.erl
@@ -30,6 +30,8 @@
 	 stop_listener/1, stop_listener/2, stop_daemon/1, stop_daemon/2,
 	 shell/1, shell/2, shell/3]).
 
+-export([sign_data/2, verify_data/3]).
+
 %%--------------------------------------------------------------------
 %% Function: start([, Type]) -> ok
 %%
@@ -94,11 +96,17 @@ connect(Host, Port, Options, Timeout) ->
 		    do_demonitor(MRef, Manager),
 		    {error, Other};
 		{'DOWN', MRef, _, Manager, Reason} when is_pid(Manager) ->
+		    error_logger:warning_report([{ssh, connect},
+						 {diagnose,
+						  "Connection was closed before properly set up."},
+						 {host, Host},
+						 {port, Port},
+						 {reason, Reason}]),
 		    receive %% Clear EXIT message from queue
 			{'EXIT', Manager, _What} -> 
-			    {error, Reason}
+			    {error, channel_closed}
 		    after 0 ->
-			    {error, Reason}
+			    {error, channel_closed}
 		    end
 	    after Timeout  ->
 		    do_demonitor(MRef, Manager),
@@ -239,6 +247,43 @@ shell(Host, Port, Options) ->
 	    Error
     end.
 
+
+%%--------------------------------------------------------------------
+%% Function: sign_data(Data, Algorithm) -> binary() | 
+%%                                         {error, Reason}
+%%
+%%   Data = binary()
+%%   Algorithm = "ssh-rsa"
+%%
+%% Description: Use SSH key to sign data.
+%%--------------------------------------------------------------------
+sign_data(Data, Algorithm) when is_binary(Data) ->
+    case ssh_file:private_identity_key(Algorithm,[]) of
+	{ok, Key} when Algorithm == "ssh-rsa" ->
+	    ssh_rsa:sign(Key, Data);
+	Error ->
+	    Error
+    end.
+
+%%--------------------------------------------------------------------
+%% Function: verify_data(Data, Signature, Algorithm) -> ok | 
+%%                                                      {error, Reason}
+%%
+%%   Data = binary()
+%%   Signature = binary()
+%%   Algorithm = "ssh-rsa"
+%%
+%% Description: Use SSH signature to verify data.
+%%--------------------------------------------------------------------
+verify_data(Data, Signature, Algorithm) when is_binary(Data), is_binary(Signature) ->
+    case ssh_file:public_identity_key(Algorithm, []) of
+	{ok, Key} when Algorithm == "ssh-rsa" ->
+	    ssh_rsa:verify(Key, Data, Signature);
+	Error ->
+	    Error
+    end.
+
+
 %%--------------------------------------------------------------------
 %%% Internal functions
 %%--------------------------------------------------------------------