"crypto/internal/fips140/subtle" ) // CMAC implements the CMAC mode from NIST SP 800-38B. // // It is optimized for use in Counter KDF (SP 800-108r1) and XAES-256-GCM // (https://c2sp.org/XAES-256-GCM), rather than for exposing it to applications // as a stand-alone MAC. type CMAC struct { b aes.Block k1 [aes.BlockSize]byte k2 [aes.BlockSize]byte } func NewCMAC(b *aes.Block) *CMAC { c := &CMAC{b: *b} c.deriveSubkeys() return c } func (c *CMAC) deriveSubkeys() { aes.EncryptBlockInternal(&c.b, c.k1[:], c.k1[:])...

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github.com/nats-io/stan.go
https://github.com/nats-io/stan.go
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                                 Apache License
                           Version 2.0, January 2004