Update FulfillRequisitionRequest and ProtocolConfig for ShuffleBasedSecretSharing protocol

src/main/proto/wfa/measurement/api/v2alpha/BUILD.bazel

@@ -496,6 +496,7 @@ proto_library(
     srcs = ["requisition_fulfillment_service.proto"],
     strip_import_prefix = IMPORT_PREFIX,
     deps = [
+        ":protocol_config_proto",
         ":requisition_proto",
         "@com_google_googleapis//google/api:client_proto",
         "@com_google_googleapis//google/api:field_behavior_proto",

src/main/proto/wfa/measurement/api/v2alpha/protocol_config.proto

@@ -201,6 +201,16 @@ message ProtocolConfig {
     NoiseMechanism noise_mechanism = 4;
   }
 
+  // Configuration for the Shuffle Based Secret Sharing Protocol.
+  message ShuffleBasedSecretSharing {
+    // Parameters for secret sharing sketches.
+    SecretSharingSketchParams sketch_params = 1
+        [(google.api.field_behavior) = REQUIRED];
+
+    // The mechanism to generate noise by workers during the computation.
+    NoiseMechanism noise_mechanism = 2;
+  }
+
   // Configuration for a specific protocol.
   message Protocol {
     // Configuration for the specific protocol.
@@ -224,6 +234,11 @@ message ProtocolConfig {
       // using this protocol can be fulfilled by calling
       // RequisitionFulfillment/FulfillRequisition with an encrypted sketch.
       ReachOnlyLiquidLegionsV2 reach_only_liquid_legions_v2 = 3;
+
+      // Shuffle Based Secret Sharing protocol.
+      //
+      // Using honest-majority setting.
+      ShuffleBasedSecretSharing shuffle_based_secret_sharing = 4;
     }
   }
 
@@ -264,3 +279,13 @@ message ReachOnlyLiquidLegionsSketchParams {
   // The maximum size of the Liquid Legions sketch.
   int64 max_size = 2 [(google.api.field_behavior) = REQUIRED];
 }
+
+// Parameters for a Shuffle Based Secret Sharing sketch.
+message SecretSharingSketchParams {
+  // The number of registers in the sketch.
+  int64 register_count = 1;
+
+  // Length of each item in bytes. #_EDPs * max_frequency should be no more than
+  // 2^(byte_per_item*8).
+  int32 byte_per_item = 2;
+}

src/main/proto/wfa/measurement/api/v2alpha/requisition_fulfillment_service.proto

@@ -18,6 +18,7 @@ package wfa.measurement.api.v2alpha;
 
 import "google/api/field_behavior.proto";
 import "google/api/resource.proto";
+import "wfa/measurement/api/v2alpha/protocol_config.proto";
 import "wfa/measurement/api/v2alpha/requisition.proto";
 
 option java_package = "org.wfanet.measurement.api.v2alpha";
@@ -55,6 +56,27 @@ message FulfillRequisitionRequest {
     // (-- api-linter: core::0141::forbidden-types=disabled
     //     aip.dev/not-precedent: This is a random 64-bit value. --)
     fixed64 nonce = 3 [(google.api.field_behavior) = REQUIRED];
+
+    // The protocol config of the Computation. This is used to validate that
+    // EDPs and the MPC are using the same protocol config.
+    // NOT required for LiquidLegionV2 protocol.
+    ProtocolConfig protocol_config = 4;
+
+    // Requisitions of ShuffleBasedSecretSharing protocol is fulfilled by either
+    // a blob or a seed.
+    message ShuffleBasedSecretSharing {
+      // The seed can be expanded into a deterministic blob using the same PRNG.
+      //
+      // If the seed is not specified or empty, it means the requisition is
+      // fulfilled by a blob of chunks.
+      bytes seed = 1;
+    }
+    // Protocol specified values.
+    oneof protocol {
+      // Shuffle based secret sharing protocol. Fulfilled by either chunks (a
+      // blob), or a seed.
+      ShuffleBasedSecretSharing shuffle_based_secret_sharing = 5;
+    }
   }
 
   // The chunk message for this streaming request.