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@ -1,4 +1,4 @@ |
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.\" $OpenBSD: pkcs5_pbkdf2.3,v 1.2 2012/09/06 19:48:12 tedu Exp $ |
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.\" $OpenBSD: pkcs5_pbkdf2.3,v 1.3 2012/09/07 05:48:20 jmc Exp $ |
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.\" |
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.\" Copyright (c) 2012 Ted Unangst <tedu@openbsd.org> |
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.\" |
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@ -14,12 +14,12 @@ |
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.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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.\" |
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.Dd $Mdocdate: September 6 2012 $ |
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.Dt pkcs5_pbkdf2 3 |
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.Dd $Mdocdate: September 7 2012 $ |
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.Dt PKCS5_PBKDF2 3 |
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.Os |
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.Sh NAME |
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.Nm pkcs5_pbkdf2 |
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.Nd password based key derivation function |
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.Nd password-based key derivation function |
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.Sh SYNOPSIS |
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.Fd #include <util.h> |
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.Ft int |
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@ -29,7 +29,7 @@ |
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The |
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.Nm |
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function converts a password into a byte array suitable for use as |
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encryption key. |
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an encryption key. |
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The password and salt values are combined and repeatedly hashed |
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.Ar rounds |
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times. |
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@ -37,7 +37,7 @@ The salt value should be randomly generated beforehand. |
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The repeated hashing is designed to thwart discovery of the key via |
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password guessing attacks. |
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The higher the number of rounds, the slower each attempt will be. |
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A minumum value of at least 1000 is recommended. |
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A minimum value of at least 1000 is recommended. |
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.Sh RETURN VALUES |
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The |
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.Fn pkcs5_pbkdf2 |
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@ -47,7 +47,12 @@ function returns 0 to indicate success and -1 for failure. |
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.Sh SEE ALSO |
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.Xr sha1 1 |
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.Sh STANDARDS |
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RFC 2898 |
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.Rs |
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.%A B. Kaliski |
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.%D September 2000 |
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.%R RFC 2898 |
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.%T PKCS #5: Password-Based Cryptography Specification Version 2.0 |
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.Re |
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.\" .Sh HISTORY |
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.\" .Sh AUTHORS |
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.Sh CAVEATS |
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jmc
12 years ago