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

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Table of Contents

   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/