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Back to Crypt Verbs

crypt.hmacSHA1

Keyed-hashing for message authentication using SHA1.

Syntax

crypt.hmacSHA1 (s, key, flTranslate)

Params

  • s, a string.
  • key, a string.
  • flTranslate is an optional boolean parameter, determining the format of the return value.

Returns

A string.

Examples

crypt.hmacSHA1 ("Hi There", string.hexStringToBinary ("0x0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b"))

“b617318655057264e28bc0b6fb378c8ef146be00” 

crypt.hmacSHA1("what do ya want for nothing?", "Jefe")

“effcdf6ae5eb2fa2d27416d5f184df9c259a7c79” 

crypt.hmacSHA1(string.hexStringToBinary
   ("0xDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD"),
    string.hexStringToBinary ("0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"))

“125d7342b9ac11cd91a39af48aa17b4f63f175d3”

Notes

As defined in Wikipedia, A keyed-hash message authentication code, or HMAC, is a type of message authentication code (MAC) calculated using a cryptographic hash function in combination with a secret key. As with any MAC, it may be used to simultaneously verify both the data integrity and the authenticity of a message. Any iterative cryptographic hash function, such as MD5 or SHA-1, may be used in the calculation of an HMAC; the resulting MAC algorithm is termed HMAC-MD5 or HMAC-SHA-1 accordingly. The cryptographic strength of the HMAC depends upon the cryptographic strength of the underlying hash function and on the size and quality of the key.


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