SHAKE

[Yabraine]

Please add SHAKE who is the part of the SHA3 hash functions. The advantage of, for example, SHAKE256, is the speed like SHA2 with security of SHA3-512. SHAKE 256 and 128 must be exactly 64 and 32 bytes respectively (like SHA3-512 and SHA3-256), not 32 and 16 (those two compromise security and collision resistance). More lenghts are no use.

"The SHAKE-256 and -128 functions have a generic security strength of 256 and 128 bits against all attacks, provided that at least 2x bits of their output is used. Requesting more than 64 or 32 bytes of output, respectively, does not increase the collision-resistance of the SHAKE functions," the devs of GO programming language notice.