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sm4: ppc64x, gcm fix bug #249

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Sun Yimin 2024-09-13 15:06:08 +08:00 committed by GitHub
parent 7e966a56de
commit f2e122f90d
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1 changed files with 4 additions and 2 deletions
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sm4/gcm_ppc64x.go
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@ -169,7 +169,7 @@ func (g *gcmAsm) paddedGHASH(hash *[16]byte, data []byte) {
// auth calculates GHASH(ciphertext, additionalData), masks the result with
// tagMask and writes the result to out.
func (g *gcmAsm) auth(out, ciphertext, aad []byte, tagMask *[gcmTagSize]byte) {
var hash [16]byte
var hash [gcmTagSize]byte
g.paddedGHASH(&hash, aad)
g.paddedGHASH(&hash, ciphertext)
lens := gcmLengths(uint64(len(aad))*8, uint64(len(ciphertext))*8)
@ -199,7 +199,9 @@ func (g *gcmAsm) Seal(dst, nonce, plaintext, data []byte) []byte {
gcmInc32(&counter)
g.counterCrypt(out, plaintext, &counter)
g.auth(out[len(plaintext):], out[:len(plaintext)], data, &tagMask)
var tag [gcmTagSize]byte
g.auth(tag[:], out[:len(plaintext)], data, &tagMask)
copy(out[len(plaintext):], tag[:])
return ret
}