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sm4: ctr mode fix issue and comments

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Sun Yimin 2023-06-27 17:52:23 +08:00 committed by GitHub
parent 8041c5e310
commit 1d0e77388a
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 2 additions and 2 deletions
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sm4/ctr_cipher_asm.go
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@ -54,7 +54,7 @@ func (x *ctr) genCtr(start int) {
} }
// Increment counter // Increment counter
end := start + BlockSize end := start + BlockSize
for i := end - 1; i >= 0; i-- { for i := end - 1; i >= start; i-- {
x.ctr[i]++ x.ctr[i]++
if x.ctr[i] != 0 { if x.ctr[i] != 0 {
break break
@ -70,7 +70,7 @@ func (x *ctr) refill() {
x.b.EncryptBlocks(x.out[remain:], x.ctr) x.b.EncryptBlocks(x.out[remain:], x.ctr)
remain += x.b.blocksSize remain += x.b.blocksSize
// Increment counter // Generate complelte [x.b.batchBlocks] counters
for i := 0; i < x.b.batchBlocks; i++ { for i := 0; i < x.b.batchBlocks; i++ {
x.genCtr(i * BlockSize) x.genCtr(i * BlockSize)
} }