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Back to Crypt Verbs

crypt.cramMD5

Computes a challenge-response authentication mechanism (CRAM) response using MD5.

Syntax

crypt.cramMD5 (username, password, challenge)

Params

  • username, a string.
  • password, a string.
  • challenge, a string.

Returns

A string that can used as a response to a challenge-response protocol.

Examples

crypt.cramMD5 ("tim", "tanstaaftanstaaf", 
   base64.decode ("PDE4OTYuNjk3MTcwOTUyQHBvc3RvZmZpY2UucmVzdG9uLm1jaS5uZXQ+"))

“tim b913a602c7eda7a495b4e6e7334d3890”

Notes

As defined in Wikipedia, CRAM-MD5 is a challenge-response authentication mechanism (hence “CRAM”) defined in RFC 2195 based on the HMAC-MD5 MAC algorithm. It is employed by some SASL implementations, and it is quite often supported by SMTP-AUTH Mail submission agents.


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