Needful Program Management

# npm

## js-keccak

2.2.1 • Public • Published

The Keccak family of hashing algorithms. Included Keccak Sponge Function set and SHA-3 function set, SHA-3 derived hash functions.

# Dependencies

KMAC -> cSHAKE -> SHAKE -> KECCAK[c]
HMAC -> SHAKE -> KECCAK[c]

## KECCAK-pb, nr
`θ, ρ, π, χ, ι分别为5个不同的函数，在[NIST FIPS-202]Sec 3.2.1 - 3.2.5中给出`

Rnd(A, ir) = ι(χ(π(ρ(θ(A)))), ir)

``````{
input: {
string S,
number nr
}
output: {
string S' `length b`
}
step: {
1. 将S转换为state array A,如Sec 3.1.2中的定义
2. for (let ir = 12+2l-nr; i <= 12+2l-1;) A = Rnd(A, ir)
3. 将A转换成长度为b的字符串S',如Sec 3.1.3中定义
4. 返回S'
}
}
``````

# KECCAK-f

``````KECCAK-f[b] = KECCAK-p[b, 12+2l]
KECCAK-f[1600] = KECCAP-p[1600, 24]
``````

# KECCAK

``````underlying function: KECCAK-p[b, 12+2l] (Sec 3.3)

rate r, capacity c
b = r + c -> {25, 50, 100, 200, 400, 800, 1600}
``````

# KECCAK[c]

``````b = 1600
KECCAK[c] = SPONGE[ KECCAK-p[1600,24], pad10*1, 1600-c ]
KECCAK[c](N, d) = SPONGE[ KECCAK-p[1600,24], pad10*1, 1600-c ](N, d)
``````

# SHA-3

``````message M
SHA3-224(M) = KECCAK[448] (M || 01, 224)
SHA3-256(M) = KECCAK[512] (M || 01, 256)
SHA3-384(M) = KECCAK[768] (M || 01, 384)
SHA3-512(M) = KECCAK[1024](M || 01, 512)
``````

## Keywords

### Install

`npm i js-keccak`

1

2.2.1

MIT

34.8 kB

11