Replicator: fix issues when a peer is accessible via SSL.

Closes COUCHDB-491.


git-svn-id: https://svn.apache.org/repos/asf/couchdb/trunk@1023274 13f79535-47bb-0310-9956-ffa450edef68

3 files changed, 43 insertions, 1 deletions

diff --git a/etc/couchdb/default.ini.tpl.in b/etc/couchdb/default.ini.tpl.in
index 49a64058..d7132885 100644
--- a/etc/couchdb/default.ini.tpl.in
+++ b/etc/couchdb/default.ini.tpl.in
@@ -129,3 +129,9 @@ compressible_types = text/*, application/javascript, application/json,  applicat
 db = _replicator
 max_http_sessions = 10
 max_http_pipeline_size = 10
+; set to true to validate peer certificates
+verify_ssl_certificates = false
+; file containing a list of peer trusted certificates (PEM format)
+; ssl_trusted_certificates_file = /etc/ssl/certs/ca-certificates.crt
+; maximum peer certificate depth (must be set even if certificate validation is off)
+ssl_certificate_max_depth = 3
diff --git a/src/couchdb/couch_rep.erl b/src/couchdb/couch_rep.erl
index 3e029421..a507f81e 100644
--- a/src/couchdb/couch_rep.erl
+++ b/src/couchdb/couch_rep.erl
@@ -608,7 +608,10 @@ open_db({Props}, _UserCtx, ProxyParams, CreateTarget) ->
         auth = AuthProps,
         headers = lists:ukeymerge(1, Headers, DefaultHeaders)
     },
-    Db = Db1#http_db{options = Db1#http_db.options ++ ProxyParams},
+    Db = Db1#http_db{
+        options = Db1#http_db.options ++ ProxyParams ++
+            couch_rep_httpc:ssl_options(Db1)
+    },
     couch_rep_httpc:db_exists(Db, CreateTarget);
 open_db(<<"http://",_/binary>>=Url, _, ProxyParams, CreateTarget) ->
     open_db({[{<<"url">>,Url}]}, [], ProxyParams, CreateTarget);
diff --git a/src/couchdb/couch_rep_httpc.erl b/src/couchdb/couch_rep_httpc.erl
index 06d4748a..4b698eb9 100644
--- a/src/couchdb/couch_rep_httpc.erl
+++ b/src/couchdb/couch_rep_httpc.erl
@@ -16,6 +16,7 @@
 
 -export([db_exists/1, db_exists/2, full_url/1, request/1, redirected_request/2,
     redirect_url/2, spawn_worker_process/1, spawn_link_worker_process/1]).
+-export([ssl_options/1]).
 
 request(#http_db{} = Req) ->
     do_request(Req).
@@ -243,3 +244,35 @@ oauth_header(Url, QS, Action, Props) ->
     Params = oauth:signed_params(Method, Url, QSL, Consumer, Token, TokenSecret)
         -- QSL,
     {"Authorization", "OAuth " ++ oauth_uri:params_to_header_string(Params)}.
+
+ssl_options(#http_db{url = Url}) ->
+    case ibrowse_lib:parse_url(Url) of
+    #url{protocol = https} ->
+        Depth = list_to_integer(
+            couch_config:get("replicator", "ssl_certificate_max_depth", "3")
+        ),
+        SslOpts = [{depth, Depth} |
+        case couch_config:get("replicator", "verify_ssl_certificates") of
+        "true" ->
+            ssl_verify_options(true);
+        _ ->
+            ssl_verify_options(false)
+        end],
+        [{is_ssl, true}, {ssl_options, SslOpts}];
+    #url{protocol = http} ->
+        []
+    end.
+
+ssl_verify_options(Value) ->
+    ssl_verify_options(Value, erlang:system_info(otp_release)).
+
+ssl_verify_options(true, OTPVersion) when OTPVersion >= "R14" ->
+    CAFile = couch_config:get("replicator", "ssl_trusted_certificates_file"),
+    [{verify, verify_peer}, {cacertfile, CAFile}];
+ssl_verify_options(false, OTPVersion) when OTPVersion >= "R14" ->
+    [{verify, verify_none}];
+ssl_verify_options(true, _OTPVersion) ->
+    CAFile = couch_config:get("replicator", "ssl_trusted_certificates_file"),
+    [{verify, 2}, {cacertfile, CAFile}];
+ssl_verify_options(false, _OTPVersion) ->
+    [{verify, 0}].