This module implements AES-CMAC on top of native AES-CBC using either the WebCrypto API or Node.js' crypto API.
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Members
(inner, constant) blockLength
This implementation of CMAC is based on the description of OMAC in http://web.cs.ucdavis.edu/~rogaway/papers/eax.pdf. As per that document:
We have made a small modification to the OMAC algorithm as it was originally presented, changing one of its two constants. Specifically, the constant 4 at line 85 was the constant 1/2 (the multiplicative inverse of 2) in the original definition of OMAC [14]. The OMAC authors indicate that they will promulgate this modification [15], which slightly simplifies implementations.
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Methods
(inner) rightXORMut(data, padding)
xor padding into the end of data. This function implements "the
operation xor→ [which] xors the shorter string into the end of longer
one". Since data is always as least as long as padding, we can
simplify the implementation.
Parameters:
| Name | Type | Description |
|---|---|---|
data |
Uint8Array | |
padding |
Uint8Array |
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