Module address 

Address structure used to domain-separate hash calls throughout SLH-DSA. ADRS (Address) structure for SLH-DSA (FIPS 205, Section 4.2).

The address structure is a 32-byte value organized as 8 big-endian u32 words. It is used to domain-separate every hash call in SLH-DSA so that distinct positions in the tree hierarchy produce independent hash outputs.

Layout

Bytes	Field	Description
[0..4]	Layer address	Hypertree layer (0 = bottom)
[4..16]	Tree address	Index of the XMSS tree (3 words)
[16..20]	Type	Address type (see constants below)
[20..32]	Type-specific	Meaning depends on the type field

Structs

Adrs

A 32-byte address structure used to domain-separate hash function calls in SLH-DSA.

Constants

FORS_PRF

Address type for FORS secret key generation via PRF.

FORS_ROOTS

Address type for FORS root compression (combining k roots into one public key).

FORS_TREE

Address type for FORS tree nodes.

TREE

Address type for XMSS/hypertree internal Merkle tree nodes.

WOTS_HASH

Address type for WOTS+ hash chain evaluation.

WOTS_PK

Address type for WOTS+ public key compression.

WOTS_PRF

Address type for WOTS+ secret key generation via PRF.