X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/8048da32800fab790b68f502c52dd00c89b5b690..22b165b48c33239aefee631ffbb00079c5486866:/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 8db93c36c2..a0c64aa6e6 100644
--- a/services/api/app/controllers/arvados/v1/collections_controller.rb
+++ b/services/api/app/controllers/arvados/v1/collections_controller.rb
@@ -10,22 +10,68 @@ class Arvados::V1::CollectionsController < ApplicationController
       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.
+    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|
+        if /^[[:digit:]]+:[[:digit:]]+:/.match tok
+          # This is a filename token, not a blob locator. Note that we
+          # keep checking tokens after this, even though manifest
+          # format dictates that all subsequent tokens will also be
+          # filenames. Safety first!
+        elsif Blob.verify_signature tok, signing_opts
+          # OK.
+        elsif Locator.parse(tok).andand.signature
+          # Signature provided, but verify_signature did not like it.
+          logger.warn "Invalid signature on locator #{tok}"
+          raise ArvadosModel::PermissionDeniedError
+        elsif Rails.configuration.permit_create_collection_with_unsigned_manifest
+          # No signature provided, but we are running in insecure mode.
+          logger.debug "Missing signature on locator #{tok} ignored"
+        elsif Blob.new(tok).empty?
+          # No signature provided -- but no data to protect, either.
+        else
+          logger.warn "Missing signature on locator #{tok}"
+          raise ArvadosModel::PermissionDeniedError
+        end
+      end
+    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
         @object.save!
       rescue ActiveRecord::RecordNotUnique
         logger.debug resource_attrs.inspect
-        if resource_attrs[:manifest_text] and resource_attrs[:uuid]
+        if @object.manifest_text and @object.uuid
           @existing_object = model_class.
             where('uuid=? and manifest_text=?',
-                  resource_attrs[:uuid],
-                  resource_attrs[:manifest_text]).
+                  @object.uuid,
+                  @object.manifest_text).
             first
           @object = @existing_object || @object
         end
       end
-
       if @object
         link_attrs = {
           owner_uuid: owner_uuid,
@@ -45,6 +91,23 @@ 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
 
@@ -214,5 +277,4 @@ class Arvados::V1::CollectionsController < ApplicationController
       end
     end
   end
-
 end