Merge pull request #58 from sublimator/nd-validate-dst-as-stringoruin…

…t8array-closes-57-2023-06-22 fix: validate hash_to_field DST as stringOrUint8Array (closes #57)
paulmillr · Jun 22, 2023 · c2edc97 · c2edc97
2 parents 62e806c + bf70ba9
commit c2edc97
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diff --git a/src/abstract/hash-to-curve.ts b/src/abstract/hash-to-curve.ts
@@ -127,7 +127,7 @@ export function expand_message_xof(
  */
 export function hash_to_field(msg: Uint8Array, count: number, options: Opts): bigint[][] {
  validateObject(options, {
- DST: 'string',
+ DST: 'stringOrUint8Array',
  p: 'bigint',
  m: 'isSafeInteger',
  k: 'isSafeInteger',

diff --git a/src/abstract/utils.ts b/src/abstract/utils.ts
@@ -246,6 +246,7 @@ const validatorFns = {
  function: (val: any) => typeof val === 'function',
  boolean: (val: any) => typeof val === 'boolean',
  string: (val: any) => typeof val === 'string',
+ stringOrUint8Array: (val: any) => typeof val === 'string' || val instanceof Uint8Array,
  isSafeInteger: (val: any) => Number.isSafeInteger(val),
  array: (val: any) => Array.isArray(val),
  field: (val: any, object: any) => (object as any).Fp.isValid(val),