diff --git a/lib/internal/crypto/pbkdf2.js b/lib/internal/crypto/pbkdf2.js
index b6b61d35857628..9cbfb3dc64211d 100644
--- a/lib/internal/crypto/pbkdf2.js
+++ b/lib/internal/crypto/pbkdf2.js
@@ -2,8 +2,8 @@
 
 const { AsyncWrap, Providers } = process.binding('async_wrap');
 const { Buffer } = require('buffer');
-const { INT_MAX, pbkdf2: _pbkdf2 } = process.binding('crypto');
-const { validateInt32 } = require('internal/validators');
+const { pbkdf2: _pbkdf2 } = process.binding('crypto');
+const { validateUint32 } = require('internal/validators');
 const {
   ERR_CRYPTO_INVALID_DIGEST,
   ERR_CRYPTO_PBKDF2_ERROR,
@@ -59,8 +59,8 @@ function check(password, salt, iterations, keylen, digest, callback) {
 
   password = validateArrayBufferView(password, 'password');
   salt = validateArrayBufferView(salt, 'salt');
-  iterations = validateInt32(iterations, 'iterations', 0, INT_MAX);
-  keylen = validateInt32(keylen, 'keylen', 0, INT_MAX);
+  iterations = validateUint32(iterations, 'iterations', 0);
+  keylen = validateUint32(keylen, 'keylen', 0);
 
   return { password, salt, iterations, keylen, digest };
 }
diff --git a/lib/internal/crypto/scrypt.js b/lib/internal/crypto/scrypt.js
index edfe522be47a74..68ae4f6f7d5385 100644
--- a/lib/internal/crypto/scrypt.js
+++ b/lib/internal/crypto/scrypt.js
@@ -2,8 +2,8 @@
 
 const { AsyncWrap, Providers } = process.binding('async_wrap');
 const { Buffer } = require('buffer');
-const { INT_MAX, scrypt: _scrypt } = process.binding('crypto');
-const { validateInt32 } = require('internal/validators');
+const { scrypt: _scrypt } = process.binding('crypto');
+const { validateUint32 } = require('internal/validators');
 const {
   ERR_CRYPTO_SCRYPT_INVALID_PARAMETER,
   ERR_CRYPTO_SCRYPT_NOT_SUPPORTED,
@@ -76,31 +76,31 @@ function check(password, salt, keylen, options, callback) {
 
   password = validateArrayBufferView(password, 'password');
   salt = validateArrayBufferView(salt, 'salt');
-  keylen = validateInt32(keylen, 'keylen', 0, INT_MAX);
+  keylen = validateUint32(keylen, 'keylen');
 
   let { N, r, p, maxmem } = defaults;
   if (options && options !== defaults) {
     let has_N, has_r, has_p;
     if (has_N = (options.N !== undefined))
-      N = validateInt32(options.N, 'N', 0, INT_MAX);
+      N = validateUint32(options.N, 'N');
     if (options.cost !== undefined) {
       if (has_N) throw new ERR_CRYPTO_SCRYPT_INVALID_PARAMETER();
-      N = validateInt32(options.cost, 'cost', 0, INT_MAX);
+      N = validateUint32(options.cost, 'cost');
     }
     if (has_r = (options.r !== undefined))
-      r = validateInt32(options.r, 'r', 0, INT_MAX);
+      r = validateUint32(options.r, 'r');
     if (options.blockSize !== undefined) {
       if (has_r) throw new ERR_CRYPTO_SCRYPT_INVALID_PARAMETER();
-      r = validateInt32(options.blockSize, 'blockSize', 0, INT_MAX);
+      r = validateUint32(options.blockSize, 'blockSize');
     }
     if (has_p = (options.p !== undefined))
-      p = validateInt32(options.p, 'p', 0, INT_MAX);
+      p = validateUint32(options.p, 'p');
     if (options.parallelization !== undefined) {
       if (has_p) throw new ERR_CRYPTO_SCRYPT_INVALID_PARAMETER();
-      p = validateInt32(options.parallelization, 'parallelization', 0, INT_MAX);
+      p = validateUint32(options.parallelization, 'parallelization');
     }
     if (options.maxmem !== undefined)
-      maxmem = validateInt32(options.maxmem, 'maxmem', 0, INT_MAX);
+      maxmem = validateUint32(options.maxmem, 'maxmem');
     if (N === 0) N = defaults.N;
     if (r === 0) r = defaults.r;
     if (p === 0) p = defaults.p;
diff --git a/test/parallel/test-crypto-pbkdf2.js b/test/parallel/test-crypto-pbkdf2.js
index e1fa1e3d86f5fb..0f5d4618ea156c 100644
--- a/test/parallel/test-crypto-pbkdf2.js
+++ b/test/parallel/test-crypto-pbkdf2.js
@@ -6,8 +6,6 @@ if (!common.hasCrypto)
 const assert = require('assert');
 const crypto = require('crypto');
 
-const { INT_MAX } = process.binding('constants').crypto;
-
 //
 // Test PBKDF2 with RFC 6070 test vectors (except #4)
 //
@@ -71,7 +69,7 @@ assert.throws(
     code: 'ERR_OUT_OF_RANGE',
     name: 'RangeError [ERR_OUT_OF_RANGE]',
     message: 'The value of "iterations" is out of range. ' +
-             'It must be >= 0 && <= 2147483647. Received -1'
+             'It must be >= 0 && < 4294967296. Received -1'
   }
 );
 
@@ -100,7 +98,7 @@ assert.throws(
     });
 });
 
-[-1, 4073741824, INT_MAX + 1].forEach((input) => {
+[-1, 4294967297].forEach((input) => {
   assert.throws(
     () => {
       crypto.pbkdf2('password', 'salt', 1, input, 'sha256',
@@ -109,7 +107,7 @@ assert.throws(
       code: 'ERR_OUT_OF_RANGE',
       name: 'RangeError [ERR_OUT_OF_RANGE]',
       message: 'The value of "keylen" is out of range. It ' +
-               `must be >= 0 && <= 2147483647. Received ${input}`
+               `must be >= 0 && < 4294967296. Received ${input}`
     });
 });