Internet Engineering Task Force (IETF)                      S. Josefsson
Request for Comments: 6070                                        SJD AB
Category: Informational                                     January 2011
ISSN: 2070-1721

PKCS #5: Password-Based Key Derivation Function 2 (PBKDF2)
Test Vectors

Abstract

   This document contains test vectors for the Public-Key Cryptography
   Standards (PKCS) #5 Password-Based Key Derivation Function 2 (PBKDF2)
   with the Hash-based Message Authentication Code (HMAC) Secure Hash
   Algorithm (SHA-1) pseudorandom function.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6070.

Copyright Notice

   Copyright (c) 2011 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

   1. Introduction ....................................................2
   2. PBKDF2 HMAC-SHA1 Test Vectors ...................................2
   3. Acknowledgements ................................................4
   4. Copying Conditions ..............................................4
   5. Security Considerations .........................................4
   6. References ......................................................4
      6.1. Normative References .......................................4
      6.2. Informative References .....................................5

1. Introduction

   The Public-Key Cryptography Standards (PKCS) #5 [RFC2898] Password-
   Based Key Derivation Function 2 (PBKDF2) is used by several protocols
   to derive encryption keys from a password.

   For example, Salted Challenge Response Authentication Mechanism
   (SCRAM) [RFC5802] uses PBKDF2 with Hash-based Message Authentication
   Code (HMAC) [RFC2104] and Secure Hash Algorithm (SHA-1)
   [FIPS.180-1.1995].

   Test vectors for the algorithm were not included in the original
   specification, but are often useful for implementers.  This document
   addresses the shortcoming.

2. PBKDF2 HMAC-SHA1 Test Vectors

   The input strings below are encoded using ASCII [ANSI.X3-4.1986].
   The sequence "\0" (without quotation marks) means a literal ASCII NUL
   value (1 octet).  "DK" refers to the Derived Key.

     Input:
       P = "password" (8 octets)
       S = "salt" (4 octets)
       c = 1
       dkLen = 20

     Output:
       DK = 0c 60 c8 0f 96 1f 0e 71
            f3 a9 b5 24 af 60 12 06
            2f e0 37 a6             (20 octets)

     Input:
       P = "password" (8 octets)
       S = "salt" (4 octets)
       c = 2
       dkLen = 20

     Output:
       DK = ea 6c 01 4d c7 2d 6f 8c
            cd 1e d9 2a ce 1d 41 f0
            d8 de 89 57             (20 octets)

     Input:
       P = "password" (8 octets)
       S = "salt" (4 octets)
       c = 4096
       dkLen = 20

     Output:
       DK = 4b 00 79 01 b7 65 48 9a
            be ad 49 d9 26 f7 21 d0
            65 a4 29 c1             (20 octets)

     Input:
       P = "password" (8 octets)
       S = "salt" (4 octets)
       c = 16777216
       dkLen = 20

     Output:
       DK = ee fe 3d 61 cd 4d a4 e4
            e9 94 5b 3d 6b a2 15 8c
            26 34 e9 84             (20 octets)

     Input:
       P = "passwordPASSWORDpassword" (24 octets)
       S = "saltSALTsaltSALTsaltSALTsaltSALTsalt" (36 octets)
       c = 4096
       dkLen = 25

     Output:
       DK = 3d 2e ec 4f e4 1c 84 9b
            80 c8 d8 36 62 c0 e4 4a
            8b 29 1a 96 4c f2 f0 70
            38                      (25 octets)

     Input:
       P = "pass\0word" (9 octets)
       S = "sa\0lt" (5 octets)
       c = 4096
       dkLen = 16

     Output:
       DK = 56 fa 6a a7 55 48 09 9d
            cc 37 d7 f0 34 25 e0 c3 (16 octets)

3. Acknowledgements

   Barry Brachman and Love Hornquist Astrand confirmed the test vectors
   (using independent implementations) and pointed out a mistake in the
   salt octet length count.

4. Copying Conditions

This document should be considered a Code Component and is thus
available under the BSD license.

5. Security Considerations

The security considerations in [RFC2898] apply. This document does
not introduce any new security considerations.

6. References

6.1. Normative References

   [ANSI.X3-4.1986]
               American National Standards Institute, "Coded Character
               Set - 7-bit American Standard Code for Information
               Interchange", ANSI X3.4, 1986.

   [RFC2104]   Krawczyk, H., Bellare, M., and R. Canetti, "HMAC: Keyed-
               Hashing for Message Authentication", RFC 2104,
               February 1997.

   [RFC2898]   Kaliski, B., "PKCS #5: Password-Based Cryptography
               Specification Version 2.0", RFC 2898, September 2000.

   [FIPS.180-1.1995]
               National Institute of Standards and Technology, "Secure
               Hash Standard", FIPS PUB 180-1, April 1995,
               <http://www.itl.nist.gov/fipspubs/fip180-1.htm>.

6.2. Informative References

   [RFC5802]   Newman, C., Menon-Sen, A., Melnikov, A., and N. Williams,
               "Salted Challenge Response Authentication Mechanism
               (SCRAM) SASL and GSS-API Mechanisms", RFC 5802,
               July 2010.

Author's Address

   Simon Josefsson
   SJD AB
   Hagagatan 24
   Stockholm  113 47
   SE

   EMail: simon@josefsson.org
   URI:   http://josefsson.org/