2 files changed, 17 insertions, 0 deletions
diff --git a/third_party/nix/src/libutil/hash.cc b/third_party/nix/src/libutil/hash.cc
index 97cc137b11a7..f7ee44728f60 100644
--- a/third_party/nix/src/libutil/hash.cc
+++ b/third_party/nix/src/libutil/hash.cc
@@ -35,6 +35,21 @@ std::optional<HashType> hash_type_from(nix::proto::HashType hash_type) {
   }
 }
 
+nix::proto::HashType HashTypeToProto(HashType hash_type) {
+  switch (hash_type) {
+    case HashType::htMD5:
+      return nix::proto::HashType::MD5;
+    case HashType::htSHA1:
+      return nix::proto::HashType::SHA1;
+    case HashType::htSHA256:
+      return nix::proto::HashType::SHA256;
+    case HashType::htSHA512:
+      return nix::proto::HashType::SHA512;
+    default:
+      return nix::proto::HashType::UNKNOWN;
+  }
+}
+
 void Hash::init() {
   if (type == htMD5) {
     hashSize = md5HashSize;
diff --git a/third_party/nix/src/libutil/hash.hh b/third_party/nix/src/libutil/hash.hh
index bc32f9146373..4d52702aee75 100644
--- a/third_party/nix/src/libutil/hash.hh
+++ b/third_party/nix/src/libutil/hash.hh
@@ -16,6 +16,8 @@ enum HashType : char { htUnknown, htMD5, htSHA1, htSHA256, htSHA512 };
 
 std::optional<HashType> hash_type_from(nix::proto::HashType hash_type);
 
+nix::proto::HashType HashTypeToProto(HashType hash_type);
+
 const int md5HashSize = 16;
 const int sha1HashSize = 20;
 const int sha256HashSize = 32;