1 files changed, 0 insertions, 47 deletions
diff --git a/packages/taler-util/src/kdf.ts b/packages/taler-util/src/kdf.ts
index 7710de90c..8f4314340 100644
--- a/packages/taler-util/src/kdf.ts
+++ b/packages/taler-util/src/kdf.ts
@@ -58,50 +58,3 @@ export function hmacSha512(key: Uint8Array, message: Uint8Array): Uint8Array {
 export function hmacSha256(key: Uint8Array, message: Uint8Array): Uint8Array {
   return hmac(sha256, 64, key, message);
 }
-
-/**
- * HMAC-SHA512-SHA256 (see RFC 5869).
- */
-export function kdfKw(args: {
-  outputLength: number;
-  ikm: Uint8Array;
-  salt?: Uint8Array;
-  info?: Uint8Array;
-}) {
-  return kdf(args.outputLength, args.ikm, args.salt, args.info);
-}
-
-export function kdf(
-  outputLength: number,
-  ikm: Uint8Array,
-  salt?: Uint8Array,
-  info?: Uint8Array,
-): Uint8Array {
-  salt = salt ?? new Uint8Array(64);
-  // extract
-  const prk = hmacSha512(salt, ikm);
-
-  info = info ?? new Uint8Array(0);
-
-  // expand
-  const N = Math.ceil(outputLength / 32);
-  const output = new Uint8Array(N * 32);
-  for (let i = 0; i < N; i++) {
-    let buf;
-    if (i == 0) {
-      buf = new Uint8Array(info.byteLength + 1);
-      buf.set(info, 0);
-    } else {
-      buf = new Uint8Array(info.byteLength + 1 + 32);
-      for (let j = 0; j < 32; j++) {
-        buf[j] = output[(i - 1) * 32 + j];
-      }
-      buf.set(info, 32);
-    }
-    buf[buf.length - 1] = i + 1;
-    const chunk = hmacSha256(prk, buf);
-    output.set(chunk, i * 32);
-  }
-
-  return output.slice(0, outputLength);
-}