init

tea_1.16_asm.go

@@ -0,0 +1,25 @@
+//go:build !go1.17 && amd64
+// +build !go1.17,amd64
+
+package tea
+
+import (
+	"math/rand"
+	"unsafe"
+)
+
+// implemented in tea_$GOARCH.s
+func encrypt(dstlen uintptr, tlen uintptr)
+func decrypt(datalen uintptr, dstlen uintptr, t *TEA)
+
+//go:nosplit
+func (t TEA) Encrypt(src []byte) (dst []byte) {
+	lens := len(src)
+	fill := 10 - (lens+1)&7
+	dst = make([]byte, fill+lens+7)
+	_, _ = rand.Read(dst[0:fill])
+	dst[0] = byte(fill-3) | 0xF8 // 存储pad长度
+	copy(dst[fill:], src)
+	encrypt(uintptr(*(*unsafe.Pointer)(unsafe.Pointer(&dst)))|uintptr(len(dst)<<40), uintptr(unsafe.Pointer(&t))|(uintptr(len(dst))&0xffffff00_00000000))
+	return dst
+}