More signature debugging.

lib/pleroma/plugs/http_signature.ex

@@ -14,9 +14,14 @@ def call(%{assigns: %{valid_signature: true}} = conn, opts) do
   def call(conn, opts) do
     user = conn.params["actor"]
     Logger.debug("Checking sig for #{user}")
+
     if get_req_header(conn, "signature") do
-      conn = conn
+      conn =
-      |> put_req_header("(request-target)", String.downcase("#{conn.method}") <> " #{conn.request_path}")
+        conn
+        |> put_req_header(
+          "(request-target)",
+          String.downcase("#{conn.method}") <> " #{conn.request_path}"
+        )
 
       assign(conn, :valid_signature, HTTPSignatures.validate_conn(conn))
     else

lib/pleroma/web/http_signatures/http_signatures.ex

@@ -7,10 +7,11 @@ defmodule Pleroma.Web.HTTPSignatures do
   def split_signature(sig) do
     default = %{"headers" => "date"}
 
-    sig = sig
+    sig =
+      sig
       |> String.trim()
       |> String.split(",")
-    |> Enum.reduce(default, fn(part, acc) ->
+      |> Enum.reduce(default, fn part, acc ->
         [key | rest] = String.split(part, "=")
         value = Enum.join(rest, "=")
         Map.put(acc, key, String.trim(value, "\""))
@@ -21,6 +22,8 @@ def split_signature(sig) do
 
   def validate(headers, signature, public_key) do
     sigstring = build_signing_string(headers, signature["headers"])
+    Logger.debug("Signature: #{signature["signature"]}")
+    Logger.debug("Sigstring: #{sigstring}")
     {:ok, sig} = Base.decode64(signature["signature"])
     :public_key.verify(sigstring, :sha256, sig, public_key)
   end
@@ -55,7 +58,7 @@ def validate_conn(conn, public_key) do
 
   def build_signing_string(headers, used_headers) do
     used_headers
-    |> Enum.map(fn (header) -> "#{header}: #{headers[header]}" end)
+    |> Enum.map(fn header -> "#{header}: #{headers[header]}" end)
     |> Enum.join("\n")
   end
 
@@ -63,7 +66,9 @@ def sign(user, headers) do
     with {:ok, %{info: %{"keys" => keys}}} <- Pleroma.Web.WebFinger.ensure_keys_present(user),
          {:ok, private_key, _} = Pleroma.Web.Salmon.keys_from_pem(keys) do
       sigstring = build_signing_string(headers, Map.keys(headers))
-      signature = :public_key.sign(sigstring, :sha256, private_key)
+
+      signature =
+        :public_key.sign(sigstring, :sha256, private_key)
         |> Base.encode64()
 
       [
@@ -72,7 +77,7 @@ def sign(user, headers) do
         headers: Map.keys(headers) |> Enum.join(" "),
         signature: signature
       ]
-      |> Enum.map(fn({k, v}) -> "#{k}=\"#{v}\"" end)
+      |> Enum.map(fn {k, v} -> "#{k}=\"#{v}\"" end)
       |> Enum.join(",")
     end
   end

test/fixtures/httpoison_mock/lucifermysticus.json

@@ -0,0 +1 @@
+{"@context":["https://www.w3.org/ns/activitystreams","https://w3id.org/security/v1",{"manuallyApprovesFollowers":"as:manuallyApprovesFollowers","sensitive":"as:sensitive","movedTo":"as:movedTo","Hashtag":"as:Hashtag","ostatus":"http://ostatus.org#","atomUri":"ostatus:atomUri","inReplyToAtomUri":"ostatus:inReplyToAtomUri","conversation":"ostatus:conversation","toot":"http://joinmastodon.org/ns#","Emoji":"toot:Emoji"}],"id":"https://mst3k.interlinked.me/users/luciferMysticus","type":"Person","following":"https://mst3k.interlinked.me/users/luciferMysticus/following","followers":"https://mst3k.interlinked.me/users/luciferMysticus/followers","inbox":"https://mst3k.interlinked.me/users/luciferMysticus/inbox","outbox":"https://mst3k.interlinked.me/users/luciferMysticus/outbox","preferredUsername":"luciferMysticus","name":"Louis Cypher","summary":"\u003cp\u003eFounding member of Interlinked, recovering band geek, aviation enthusiast, and software developer\u003c/p\u003e\u003cp\u003eStuck in Wisconsin, USA\u003c/p\u003e\u003cp\u003e\u003ca href=\"https://mst3k.interlinked.me/tags/nobot\" class=\"mention hashtag\" rel=\"tag\"\u003e#\u003cspan\u003enobot\u003c/span\u003e\u003c/a\u003e\u003c/p\u003e","url":"https://mst3k.interlinked.me/@luciferMysticus","manuallyApprovesFollowers":false,"publicKey":{"id":"https://mst3k.interlinked.me/users/luciferMysticus#main-key","owner":"https://mst3k.interlinked.me/users/luciferMysticus","publicKeyPem":"-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAx2+Q4KKYrzM7K/IglGGq\nQrpQmgs1ZhxE6hI4y5Jsv2b9FWxaVOWgf0YcDG2XO4wZoBmcyqJTaKUFnMCwasaC\nN2YbzUgMWk3krT2yYZMQD6rbHPb8c3Ou/iI84UbLrFeCBu9RgnzPXcvRyH2ktjmZ\npSTvTcys+QARa//NNVS+nns4ZkZbHF9hQm4+kEOpotzOgMratVSTteQVfIwziwHh\n7SZIfLYCgamBsF7wu7DtEDh317SYiyoZD9cj+kF0eXs/tT8oY+yVUYOAtbhkDgcj\nBuK9TKEmIKGTTDeLYCsXh5B8Attb9+A/9ZUmBc0/DgrMtXSI2daGPiRBeAbH7BZP\nKwIDAQAB\n-----END PUBLIC KEY-----\n"},"endpoints":{"sharedInbox":"https://mst3k.interlinked.me/inbox"},"icon":{"type":"Image","mediaType":"image/jpeg","url":"https://s3-us-east-2.amazonaws.com/interlinked-mst3k/accounts/avatars/000/000/008/original/2ee4e270d680aaa6.jpg"}}

test/web/http_sigs/http_sig_test.exs

@@ -5,11 +5,11 @@ defmodule Pleroma.Web.HTTPSignaturesTest do
   alias Pleroma.Web.HTTPSignatures
   import Pleroma.Factory
 
-  @private_key (hd(:public_key.pem_decode(File.read!("test/web/http_sigs/priv.key")))
+  @private_key hd(:public_key.pem_decode(File.read!("test/web/http_sigs/priv.key")))
-    |> :public_key.pem_entry_decode())
+               |> :public_key.pem_entry_decode()
 
-  @public_key (hd(:public_key.pem_decode(File.read!("test/web/http_sigs/pub.key")))
+  @public_key hd(:public_key.pem_decode(File.read!("test/web/http_sigs/pub.key")))
-    |> :public_key.pem_entry_decode())
+              |> :public_key.pem_entry_decode()
 
   @headers %{
     "(request-target)" => "post /foo?param=value&pet=dog",
@@ -38,7 +38,8 @@ test "split up a signature" do
     expected = %{
       "keyId" => "Test",
       "algorithm" => "rsa-sha256",
-      "signature" => "jKyvPcxB4JbmYY4mByyBY7cZfNl4OW9HpFQlG7N4YcJPteKTu4MWCLyk+gIr0wDgqtLWf9NLpMAMimdfsH7FSWGfbMFSrsVTHNTk0rK3usrfFnti1dxsM4jl0kYJCKTGI/UWkqiaxwNiKqGcdlEDrTcUhhsFsOIo8VhddmZTZ8w=",
+      "signature" =>
+        "jKyvPcxB4JbmYY4mByyBY7cZfNl4OW9HpFQlG7N4YcJPteKTu4MWCLyk+gIr0wDgqtLWf9NLpMAMimdfsH7FSWGfbMFSrsVTHNTk0rK3usrfFnti1dxsM4jl0kYJCKTGI/UWkqiaxwNiKqGcdlEDrTcUhhsFsOIo8VhddmZTZ8w=",
       "headers" => ["date"]
     }
 
@@ -66,10 +67,13 @@ test "it contructs a signing string" do
   end
 
   test "it validates a conn" do
-    public_key_pem = "-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnGb42rPZIapY4Hfhxrgn\nxKVJczBkfDviCrrYaYjfGxawSw93dWTUlenCVTymJo8meBlFgIQ70ar4rUbzl6GX\nMYvRdku072d1WpglNHXkjKPkXQgngFDrh2sGKtNB/cEtJcAPRO8OiCgPFqRtMiNM\nc8VdPfPdZuHEIZsJ/aUM38EnqHi9YnVDQik2xxDe3wPghOhqjxUM6eLC9jrjI+7i\naIaEygUdyst9qVg8e2FGQlwAeS2Eh8ygCxn+bBlT5OyV59jSzbYfbhtF2qnWHtZy\nkL7KOOwhIfGs7O9SoR2ZVpTEQ4HthNzainIe/6iCR5HGrao/T8dygweXFYRv+k5A\nPQIDAQAB\n-----END PUBLIC KEY-----\n"
+    public_key_pem =
+      "-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnGb42rPZIapY4Hfhxrgn\nxKVJczBkfDviCrrYaYjfGxawSw93dWTUlenCVTymJo8meBlFgIQ70ar4rUbzl6GX\nMYvRdku072d1WpglNHXkjKPkXQgngFDrh2sGKtNB/cEtJcAPRO8OiCgPFqRtMiNM\nc8VdPfPdZuHEIZsJ/aUM38EnqHi9YnVDQik2xxDe3wPghOhqjxUM6eLC9jrjI+7i\naIaEygUdyst9qVg8e2FGQlwAeS2Eh8ygCxn+bBlT5OyV59jSzbYfbhtF2qnWHtZy\nkL7KOOwhIfGs7O9SoR2ZVpTEQ4HthNzainIe/6iCR5HGrao/T8dygweXFYRv+k5A\nPQIDAQAB\n-----END PUBLIC KEY-----\n"
+
     [public_key] = :public_key.pem_decode(public_key_pem)
 
-    public_key = public_key
+    public_key =
+      public_key
       |> :public_key.pem_entry_decode()
 
     conn = %{
@@ -82,7 +86,9 @@ test "it validates a conn" do
         {"digest", "SHA-256=x/bHADMW8qRrq2NdPb5P9fl0lYpKXXpe5h5maCIL0nM="},
         {"content-type", "application/activity+json"},
         {"(request-target)", "post /users/demiurge/inbox"},
-        {"signature", "keyId=\"http://mastodon.example.org/users/admin#main-key\",algorithm=\"rsa-sha256\",headers=\"(request-target) user-agent host date digest content-type\",signature=\"i0FQvr51sj9BoWAKydySUAO1RDxZmNY6g7M62IA7VesbRSdFZZj9/fZapLp6YSuvxUF0h80ZcBEq9GzUDY3Chi9lx6yjpUAS2eKb+Am/hY3aswhnAfYd6FmIdEHzsMrpdKIRqO+rpQ2tR05LwiGEHJPGS0p528NvyVxrxMT5H5yZS5RnxY5X2HmTKEgKYYcvujdv7JWvsfH88xeRS7Jlq5aDZkmXvqoR4wFyfgnwJMPLel8P/BUbn8BcXglH/cunR0LUP7sflTxEz+Rv5qg+9yB8zgBsB4C0233WpcJxjeD6Dkq0EcoJObBR56F8dcb7NQtUDu7x6xxzcgSd7dHm5w==\""}]
+        {"signature",
+         "keyId=\"http://mastodon.example.org/users/admin#main-key\",algorithm=\"rsa-sha256\",headers=\"(request-target) user-agent host date digest content-type\",signature=\"i0FQvr51sj9BoWAKydySUAO1RDxZmNY6g7M62IA7VesbRSdFZZj9/fZapLp6YSuvxUF0h80ZcBEq9GzUDY3Chi9lx6yjpUAS2eKb+Am/hY3aswhnAfYd6FmIdEHzsMrpdKIRqO+rpQ2tR05LwiGEHJPGS0p528NvyVxrxMT5H5yZS5RnxY5X2HmTKEgKYYcvujdv7JWvsfH88xeRS7Jlq5aDZkmXvqoR4wFyfgnwJMPLel8P/BUbn8BcXglH/cunR0LUP7sflTxEz+Rv5qg+9yB8zgBsB4C0233WpcJxjeD6Dkq0EcoJObBR56F8dcb7NQtUDu7x6xxzcgSd7dHm5w==\""}
+      ]
     }
 
     assert HTTPSignatures.validate_conn(conn, public_key)
@@ -100,7 +106,8 @@ test "it validates a conn and fetches the key" do
         {"date", "Sun, 11 Feb 2018 17:12:01 GMT"},
         {"digest", "SHA-256=UXsAnMtR9c7mi1FOf6HRMtPgGI1yi2e9nqB/j4rZ99I="},
         {"content-type", "application/activity+json"},
-        {"signature", "keyId=\"http://mastodon.example.org/users/admin#main-key\",algorithm=\"rsa-sha256\",headers=\"(request-target) user-agent host date digest content-type\",signature=\"qXKqpQXUpC3d9bZi2ioEeAqP8nRMD021CzH1h6/w+LRk4Hj31ARJHDwQM+QwHltwaLDUepshMfz2WHSXAoLmzWtvv7xRwY+mRqe+NGk1GhxVZ/LSrO/Vp7rYfDpfdVtkn36LU7/Bzwxvvaa4ZWYltbFsRBL0oUrqsfmJFswNCQIG01BB52BAhGSCORHKtQyzo1IZHdxl8y80pzp/+FOK2SmHkqWkP9QbaU1qTZzckL01+7M5btMW48xs9zurEqC2sM5gdWMQSZyL6isTV5tmkTZrY8gUFPBJQZgihK44v3qgfWojYaOwM8ATpiv7NG8wKN/IX7clDLRMA8xqKRCOKw==\""},
+        {"signature",
+         "keyId=\"http://mastodon.example.org/users/admin#main-key\",algorithm=\"rsa-sha256\",headers=\"(request-target) user-agent host date digest content-type\",signature=\"qXKqpQXUpC3d9bZi2ioEeAqP8nRMD021CzH1h6/w+LRk4Hj31ARJHDwQM+QwHltwaLDUepshMfz2WHSXAoLmzWtvv7xRwY+mRqe+NGk1GhxVZ/LSrO/Vp7rYfDpfdVtkn36LU7/Bzwxvvaa4ZWYltbFsRBL0oUrqsfmJFswNCQIG01BB52BAhGSCORHKtQyzo1IZHdxl8y80pzp/+FOK2SmHkqWkP9QbaU1qTZzckL01+7M5btMW48xs9zurEqC2sM5gdWMQSZyL6isTV5tmkTZrY8gUFPBJQZgihK44v3qgfWojYaOwM8ATpiv7NG8wKN/IX7clDLRMA8xqKRCOKw==\""},
         {"(request-target)", "post /users/demiurge/inbox"}
       ]
     }
@@ -121,10 +128,12 @@ test "validate this" do
         {"date", "Sun, 18 Feb 2018 20:31:51 GMT"},
         {"digest", "SHA-256=dzH+vLyhxxALoe9RJdMl4hbEV9bGAZnSfddHQzeidTU="},
         {"content-type", "application/activity+json"},
-        {"signature", "keyId=\"https://niu.moe/users/rye#main-key\",algorithm=\"rsa-sha256\",headers=\"(request-target) user-agent host date digest content-type\",signature=\"wtxDg4kIpW7nsnUcVJhBk6SgJeDZOocr8yjsnpDRqE52lR47SH6X7G16r7L1AUJdlnbfx7oqcvomoIJoHB3ghP6kRnZW6MyTMZ2jPoi3g0iC5RDqv6oAmDSO14iw6U+cqZbb3P/odS5LkbThF0UNXcfenVNfsKosIJycFjhNQc54IPCDXYq/7SArEKJp8XwEgzmiC2MdxlkVIUSTQYfjM4EG533cwlZocw1mw72e5mm/owTa80BUZAr0OOuhoWARJV9btMb02ZyAF6SCSoGPTA37wHyfM1Dk88NHf7Z0Aov/Fl65dpRM+XyoxdkpkrhDfH9qAx4iuV2VEWddQDiXHA==\""},
+        {"signature",
+         "keyId=\"https://niu.moe/users/rye#main-key\",algorithm=\"rsa-sha256\",headers=\"(request-target) user-agent host date digest content-type\",signature=\"wtxDg4kIpW7nsnUcVJhBk6SgJeDZOocr8yjsnpDRqE52lR47SH6X7G16r7L1AUJdlnbfx7oqcvomoIJoHB3ghP6kRnZW6MyTMZ2jPoi3g0iC5RDqv6oAmDSO14iw6U+cqZbb3P/odS5LkbThF0UNXcfenVNfsKosIJycFjhNQc54IPCDXYq/7SArEKJp8XwEgzmiC2MdxlkVIUSTQYfjM4EG533cwlZocw1mw72e5mm/owTa80BUZAr0OOuhoWARJV9btMb02ZyAF6SCSoGPTA37wHyfM1Dk88NHf7Z0Aov/Fl65dpRM+XyoxdkpkrhDfH9qAx4iuV2VEWddQDiXHA==\""},
         {"(request-target)", "post /inbox"}
       ]
     }
+
     assert HTTPSignatures.validate_conn(conn)
   end
 
@@ -141,9 +150,12 @@ test "validate this too" do
         {"date", "Sun, 18 Feb 2018 21:44:46 GMT"},
         {"digest", "SHA-256=vS8uDOJlyAu78cF3k5EzrvaU9iilHCX3chP37gs5sS8="},
         {"content-type", "application/activity+json"},
-        {"signature", "keyId=\"https://niu.moe/users/rye#main-key\",algorithm=\"rsa-sha256\",headers=\"(request-target) user-agent host date digest content-type\",signature=\"IN6fHD8pLiDEf35dOaRHzJKc1wBYh3/Yq0ItaNGxUSbJTd2xMjigZbcsVKzvgYYjglDDN+disGNeD+OBKwMqkXWaWe/lyMc9wHvCH5NMhpn/A7qGLY8yToSt4vh8ytSkZKO6B97yC+Nvy6Fz/yMbvKtFycIvSXCq417cMmY6f/aG+rtMUlTbKO5gXzC7SUgGJCtBPCh1xZzu5/w0pdqdjO46ePNeR6JyJSLLV4hfo3+p2n7SRraxM4ePVCUZqhwS9LPt3Zdhy3ut+IXCZgMVIZggQFM+zXLtcXY5HgFCsFQr5WQDu+YkhWciNWtKFnWfAsnsg5sC330lZ/0Z8Z91yA==\""},
+        {"signature",
+         "keyId=\"https://niu.moe/users/rye#main-key\",algorithm=\"rsa-sha256\",headers=\"(request-target) user-agent host date digest content-type\",signature=\"IN6fHD8pLiDEf35dOaRHzJKc1wBYh3/Yq0ItaNGxUSbJTd2xMjigZbcsVKzvgYYjglDDN+disGNeD+OBKwMqkXWaWe/lyMc9wHvCH5NMhpn/A7qGLY8yToSt4vh8ytSkZKO6B97yC+Nvy6Fz/yMbvKtFycIvSXCq417cMmY6f/aG+rtMUlTbKO5gXzC7SUgGJCtBPCh1xZzu5/w0pdqdjO46ePNeR6JyJSLLV4hfo3+p2n7SRraxM4ePVCUZqhwS9LPt3Zdhy3ut+IXCZgMVIZggQFM+zXLtcXY5HgFCsFQr5WQDu+YkhWciNWtKFnWfAsnsg5sC330lZ/0Z8Z91yA==\""},
         {"(request-target)", "post /inbox"}
-      ]}
+      ]
+    }
+
     assert HTTPSignatures.validate_conn(conn)
   end
 
@@ -151,4 +163,26 @@ test "it generates a signature" do
     user = insert(:user)
     assert HTTPSignatures.sign(user, %{host: "mastodon.example.org"}) =~ "keyId=\""
   end
+
+  test "this too" do
+    conn = %{
+      params: %{"actor" => "https://mst3k.interlinked.me/users/luciferMysticus"},
+      req_headers: [
+        {"host", "soc.canned-death.us"},
+        {"user-agent", "http.rb/3.0.0 (Mastodon/2.2.0; +https://mst3k.interlinked.me/)"},
+        {"date", "Sun, 11 Mar 2018 12:19:36 GMT"},
+        {"digest", "SHA-256=V7Hl6qDK2m8WzNsjzNYSBISi9VoIXLFlyjF/a5o1SOc="},
+        {"content-type", "application/activity+json"},
+        {"signature",
+         "keyId=\"https://mst3k.interlinked.me/users/luciferMysticus#main-key\",algorithm=\"rsa-sha256\",headers=\"(request-target) user-agent host date digest content-type\",signature=\"CTYdK5a6lYMxzmqjLOpvRRASoxo2Rqib2VrAvbR5HaTn80kiImj15pCpAyx8IZp53s0Fn/y8MjCTzp+absw8kxx0k2sQAXYs2iy6xhdDUe7iGzz+XLAEqLyZIZfecynaU2nb3Z2XnFDjhGjR1vj/JP7wiXpwp6o1dpDZj+KT2vxHtXuB9585V+sOHLwSB1cGDbAgTy0jx/2az2EGIKK2zkw1KJuAZm0DDMSZalp/30P8dl3qz7DV2EHdDNfaVtrs5BfbDOZ7t1hCcASllzAzgVGFl0BsrkzBfRMeUMRucr111ZG+c0BNOEtJYOHSyZsSSdNknElggCJekONYMYk5ZA==\""},
+        {"x-forwarded-for", "2607:5300:203:2899::31:1337"},
+        {"x-forwarded-host", "soc.canned-death.us"},
+        {"x-forwarded-server", "soc.canned-death.us"},
+        {"connection", "Keep-Alive"},
+        {"content-length", "2006"},
+        {"(request-target)", "post /inbox"}
+      ]
+    }
+    assert HTTPSignatures.validate_conn(conn)
+  end
 end