X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/701074a294c18ad56b7f17cfc488a2cbc25816d5..30d63b582ed093d235ae4a9efdeda5de1d4e2f24:/services/api/app/controllers/arvados/v1/collections_controller.rb

diff --git a/services/api/app/controllers/arvados/v1/collections_controller.rb b/services/api/app/controllers/arvados/v1/collections_controller.rb
index c0cd419819..6c9d41e3f1 100644
--- a/services/api/app/controllers/arvados/v1/collections_controller.rb
+++ b/services/api/app/controllers/arvados/v1/collections_controller.rb
@@ -6,15 +6,53 @@ class Arvados::V1::CollectionsController < ApplicationController
     # exist) giving the current user (or specified owner_uuid)
     # permission to read it.
     owner_uuid = resource_attrs.delete(:owner_uuid) || current_user.uuid
-    owner_kind = if owner_uuid.match(/-(\w+)-/)[1] == User.uuid_prefix
-                   'arvados#user'
-                 else
-                   'arvados#group'
-                 end
     unless current_user.can? write: owner_uuid
       logger.warn "User #{current_user.andand.uuid} tried to set collection owner_uuid to #{owner_uuid}"
       raise ArvadosModel::PermissionDeniedError
     end
+
+    # Check permissions on the collection manifest.
+    # If any signature cannot be verified, return 403 Permission denied.
+    perms_ok = true
+    api_token = current_api_client_authorization.andand.api_token
+    signing_opts = {
+      key: Rails.configuration.blob_signing_key,
+      api_token: api_token,
+      ttl: Rails.configuration.blob_signing_ttl,
+    }
+    resource_attrs[:manifest_text].lines.each do |entry|
+      entry.split[1..-1].each do |tok|
+        # TODO(twp): in Phase 4, fail the request if the locator
+        # lacks a permission signature. (see #2755)
+        loc = Locator.parse(tok)
+        if loc and loc.signature
+          if !api_token
+            logger.warn "No API token present; cannot verify signature on #{loc}"
+            perms_ok = false
+          elsif !Blob.verify_signature tok, signing_opts
+            logger.warn "Invalid signature on locator #{loc}"
+            perms_ok = false
+          end
+        end
+      end
+    end
+    unless perms_ok
+      raise ArvadosModel::PermissionDeniedError
+    end
+
+    # Remove any permission signatures from the manifest.
+    resource_attrs[:manifest_text]
+      .gsub!(/ [[:xdigit:]]{32}(\+[[:digit:]]+)?(\+\S+)/) { |word|
+      word.strip!
+      loc = Locator.parse(word)
+      if loc
+        " " + loc.without_signature.to_s
+      else
+        " " + word
+      end
+    }
+
+    # Save the collection with the stripped manifest.
     act_as_system_user do
       @object = model_class.new resource_attrs.reject { |k,v| k == :owner_uuid }
       begin
@@ -30,15 +68,12 @@ class Arvados::V1::CollectionsController < ApplicationController
           @object = @existing_object || @object
         end
       end
-
       if @object
         link_attrs = {
           owner_uuid: owner_uuid,
           link_class: 'permission',
           name: 'can_read',
-          head_kind: 'arvados#collection',
           head_uuid: @object.uuid,
-          tail_kind: owner_kind,
           tail_uuid: owner_uuid
         }
         ActiveRecord::Base.transaction do
@@ -52,6 +87,23 @@ class Arvados::V1::CollectionsController < ApplicationController
   end
 
   def show
+    if current_api_client_authorization
+      signing_opts = {
+        key: Rails.configuration.blob_signing_key,
+        api_token: current_api_client_authorization.api_token,
+        ttl: Rails.configuration.blob_signing_ttl,
+      }
+      @object[:manifest_text]
+        .gsub!(/ [[:xdigit:]]{32}(\+[[:digit:]]+)?(\+\S+)/) { |word|
+        word.strip!
+        loc = Locator.parse(word)
+        if loc
+          " " + Blob.sign_locator(word, signing_opts)
+        else
+          " " + word
+        end
+      }
+    end
     render json: @object.as_api_response(:with_data)
   end
 
@@ -221,5 +273,4 @@ class Arvados::V1::CollectionsController < ApplicationController
       end
     end
   end
-
 end