mirror/gmsm
1
0
Fork 0
mirror of https://github.com/emmansun/gmsm.git synced 2025-04-26 12:16:20 +08:00
Code Issues Packages Projects Releases Wiki Activity

cipher/hctr: add comments for hctrReductionTable

Browse Source
This commit is contained in:
emmansun 2023-12-04 11:24:32 +08:00
parent 22358080d5
commit 8213fb98c5
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
cipher/hctr.go
View File

@ -87,6 +87,13 @@ func hctrDouble(x *hctrFieldElement) (double hctrFieldElement) {
return
}
// hctrReductionTable is stored irreducible polynomial's double & add precomputed results.
// 0000 - 0
// 0001 - irreducible polynomial >> 3
// 0010 - irreducible polynomial >> 2
// 0011 - (irreducible polynomial >> 3 xor irreducible polynomial >> 2)
// ...
// 1000 - just the irreducible polynomial
var hctrReductionTable = []uint16{
0x0000, 0x1c20, 0x3840, 0x2460, 0x7080, 0x6ca0, 0x48c0, 0x54e0,
0xe100, 0xfd20, 0xd940, 0xc560, 0x9180, 0x8da0, 0xa9c0, 0xb5e0,