PKCS #5 Password Based Key Derivation Function 2 (PBKDF2) Test Vectors
draft-josefsson-pbkdf2-test-vectors-04

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

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Copyright Notice

Copyright (c) 2010 IETF Trust and the persons identified as the document authors. All rights reserved.

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Table of Contents

1.  Introduction
2.  PBKDF2 HMAC-SHA1 Test Vectors
3.  Acknowledgements
4.  Copying conditions
5.  Security Considerations
6.  IANA Considerations
7.  References
    7.1.  Normative References
    7.2.  Informative References
§  Author's Address

1.  Introduction

The Public-Key Cryptography Standards (PKCS) #5 (Kaliski, B., “PKCS #5: Password-Based Cryptography Specification Version 2.0,” September 2000.) [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) (Newman, C., Menon-Sen, A., Melnikov, A., and N. Williams, “Salted Challenge Response Authentication Mechanism (SCRAM) SASL and GSS-API Mechanisms,” July 2010.) [RFC5802] uses PBKDF2 with Hash-based Message Authentication Code (HMAC) (Krawczyk, H., Bellare, M., and R. Canetti, “HMAC: Keyed-Hashing for Message Authentication,” February 1997.) [RFC2104] and Secure Hash Algorithm (SHA-1) (National Institute of Standards and Technology, “Secure Hash Standard,” April 1995.) [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 this shortcoming.

2.  PBKDF2 HMAC-SHA1 Test Vectors

Below the input strings are encoded using ASCII (American National Standards Institute, “Coded Character Set - 7-bit American Standard Code for Information Interchange,” 1986.) [ANSI.X3‑4.1986]. The sequence "\0" (without quotation marks) means a literal ASCII NUL value (1 octet).

  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 Hörnquist Åstrand 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 effectively available under the BSD license.

5.  Security Considerations

None.

6.  IANA Considerations

None.

7.  References

7.1. Normative References

7.2. Informative References

Author's Address