format code

common/crypto/internal/chacha_core.go

@@ -3,124 +3,122 @@ package internal
 
 import "encoding/binary"
 
-
 func ChaCha20Block(s *[16]uint32, out []byte, rounds int) {
-  var x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15 = s[0],s[1],s[2],s[3],s[4],s[5],s[6],s[7],s[8],s[9],s[10],s[11],s[12],s[13],s[14],s[15]
-	for i := 0; i < rounds; i+=2 {
-    var x uint32
-    
-x0+=x4
-x=x12^x0
-x12=(x << 16) | (x >> (32 - 16))
-x8+=x12
-x=x4^x8
-x4=(x << 12) | (x >> (32 - 12))
-x0+=x4
-x=x12^x0
-x12=(x << 8) | (x >> (32 - 8))
-x8+=x12
-x=x4^x8
-x4=(x << 7) | (x >> (32 - 7))
-x1+=x5
-x=x13^x1
-x13=(x << 16) | (x >> (32 - 16))
-x9+=x13
-x=x5^x9
-x5=(x << 12) | (x >> (32 - 12))
-x1+=x5
-x=x13^x1
-x13=(x << 8) | (x >> (32 - 8))
-x9+=x13
-x=x5^x9
-x5=(x << 7) | (x >> (32 - 7))
-x2+=x6
-x=x14^x2
-x14=(x << 16) | (x >> (32 - 16))
-x10+=x14
-x=x6^x10
-x6=(x << 12) | (x >> (32 - 12))
-x2+=x6
-x=x14^x2
-x14=(x << 8) | (x >> (32 - 8))
-x10+=x14
-x=x6^x10
-x6=(x << 7) | (x >> (32 - 7))
-x3+=x7
-x=x15^x3
-x15=(x << 16) | (x >> (32 - 16))
-x11+=x15
-x=x7^x11
-x7=(x << 12) | (x >> (32 - 12))
-x3+=x7
-x=x15^x3
-x15=(x << 8) | (x >> (32 - 8))
-x11+=x15
-x=x7^x11
-x7=(x << 7) | (x >> (32 - 7))
-x0+=x5
-x=x15^x0
-x15=(x << 16) | (x >> (32 - 16))
-x10+=x15
-x=x5^x10
-x5=(x << 12) | (x >> (32 - 12))
-x0+=x5
-x=x15^x0
-x15=(x << 8) | (x >> (32 - 8))
-x10+=x15
-x=x5^x10
-x5=(x << 7) | (x >> (32 - 7))
-x1+=x6
-x=x12^x1
-x12=(x << 16) | (x >> (32 - 16))
-x11+=x12
-x=x6^x11
-x6=(x << 12) | (x >> (32 - 12))
-x1+=x6
-x=x12^x1
-x12=(x << 8) | (x >> (32 - 8))
-x11+=x12
-x=x6^x11
-x6=(x << 7) | (x >> (32 - 7))
-x2+=x7
-x=x13^x2
-x13=(x << 16) | (x >> (32 - 16))
-x8+=x13
-x=x7^x8
-x7=(x << 12) | (x >> (32 - 12))
-x2+=x7
-x=x13^x2
-x13=(x << 8) | (x >> (32 - 8))
-x8+=x13
-x=x7^x8
-x7=(x << 7) | (x >> (32 - 7))
-x3+=x4
-x=x14^x3
-x14=(x << 16) | (x >> (32 - 16))
-x9+=x14
-x=x4^x9
-x4=(x << 12) | (x >> (32 - 12))
-x3+=x4
-x=x14^x3
-x14=(x << 8) | (x >> (32 - 8))
-x9+=x14
-x=x4^x9
-x4=(x << 7) | (x >> (32 - 7))
-}
-binary.LittleEndian.PutUint32(out[0:4], s[0]+x0)
-binary.LittleEndian.PutUint32(out[4:8], s[1]+x1)
-binary.LittleEndian.PutUint32(out[8:12], s[2]+x2)
-binary.LittleEndian.PutUint32(out[12:16], s[3]+x3)
-binary.LittleEndian.PutUint32(out[16:20], s[4]+x4)
-binary.LittleEndian.PutUint32(out[20:24], s[5]+x5)
-binary.LittleEndian.PutUint32(out[24:28], s[6]+x6)
-binary.LittleEndian.PutUint32(out[28:32], s[7]+x7)
-binary.LittleEndian.PutUint32(out[32:36], s[8]+x8)
-binary.LittleEndian.PutUint32(out[36:40], s[9]+x9)
-binary.LittleEndian.PutUint32(out[40:44], s[10]+x10)
-binary.LittleEndian.PutUint32(out[44:48], s[11]+x11)
-binary.LittleEndian.PutUint32(out[48:52], s[12]+x12)
-binary.LittleEndian.PutUint32(out[52:56], s[13]+x13)
-binary.LittleEndian.PutUint32(out[56:60], s[14]+x14)
-binary.LittleEndian.PutUint32(out[60:64], s[15]+x15)
-}
+	var x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15 = s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7], s[8], s[9], s[10], s[11], s[12], s[13], s[14], s[15]
+	for i := 0; i < rounds; i += 2 {
+		var x uint32
 
+		x0 += x4
+		x = x12 ^ x0
+		x12 = (x << 16) | (x >> (32 - 16))
+		x8 += x12
+		x = x4 ^ x8
+		x4 = (x << 12) | (x >> (32 - 12))
+		x0 += x4
+		x = x12 ^ x0
+		x12 = (x << 8) | (x >> (32 - 8))
+		x8 += x12
+		x = x4 ^ x8
+		x4 = (x << 7) | (x >> (32 - 7))
+		x1 += x5
+		x = x13 ^ x1
+		x13 = (x << 16) | (x >> (32 - 16))
+		x9 += x13
+		x = x5 ^ x9
+		x5 = (x << 12) | (x >> (32 - 12))
+		x1 += x5
+		x = x13 ^ x1
+		x13 = (x << 8) | (x >> (32 - 8))
+		x9 += x13
+		x = x5 ^ x9
+		x5 = (x << 7) | (x >> (32 - 7))
+		x2 += x6
+		x = x14 ^ x2
+		x14 = (x << 16) | (x >> (32 - 16))
+		x10 += x14
+		x = x6 ^ x10
+		x6 = (x << 12) | (x >> (32 - 12))
+		x2 += x6
+		x = x14 ^ x2
+		x14 = (x << 8) | (x >> (32 - 8))
+		x10 += x14
+		x = x6 ^ x10
+		x6 = (x << 7) | (x >> (32 - 7))
+		x3 += x7
+		x = x15 ^ x3
+		x15 = (x << 16) | (x >> (32 - 16))
+		x11 += x15
+		x = x7 ^ x11
+		x7 = (x << 12) | (x >> (32 - 12))
+		x3 += x7
+		x = x15 ^ x3
+		x15 = (x << 8) | (x >> (32 - 8))
+		x11 += x15
+		x = x7 ^ x11
+		x7 = (x << 7) | (x >> (32 - 7))
+		x0 += x5
+		x = x15 ^ x0
+		x15 = (x << 16) | (x >> (32 - 16))
+		x10 += x15
+		x = x5 ^ x10
+		x5 = (x << 12) | (x >> (32 - 12))
+		x0 += x5
+		x = x15 ^ x0
+		x15 = (x << 8) | (x >> (32 - 8))
+		x10 += x15
+		x = x5 ^ x10
+		x5 = (x << 7) | (x >> (32 - 7))
+		x1 += x6
+		x = x12 ^ x1
+		x12 = (x << 16) | (x >> (32 - 16))
+		x11 += x12
+		x = x6 ^ x11
+		x6 = (x << 12) | (x >> (32 - 12))
+		x1 += x6
+		x = x12 ^ x1
+		x12 = (x << 8) | (x >> (32 - 8))
+		x11 += x12
+		x = x6 ^ x11
+		x6 = (x << 7) | (x >> (32 - 7))
+		x2 += x7
+		x = x13 ^ x2
+		x13 = (x << 16) | (x >> (32 - 16))
+		x8 += x13
+		x = x7 ^ x8
+		x7 = (x << 12) | (x >> (32 - 12))
+		x2 += x7
+		x = x13 ^ x2
+		x13 = (x << 8) | (x >> (32 - 8))
+		x8 += x13
+		x = x7 ^ x8
+		x7 = (x << 7) | (x >> (32 - 7))
+		x3 += x4
+		x = x14 ^ x3
+		x14 = (x << 16) | (x >> (32 - 16))
+		x9 += x14
+		x = x4 ^ x9
+		x4 = (x << 12) | (x >> (32 - 12))
+		x3 += x4
+		x = x14 ^ x3
+		x14 = (x << 8) | (x >> (32 - 8))
+		x9 += x14
+		x = x4 ^ x9
+		x4 = (x << 7) | (x >> (32 - 7))
+	}
+	binary.LittleEndian.PutUint32(out[0:4], s[0]+x0)
+	binary.LittleEndian.PutUint32(out[4:8], s[1]+x1)
+	binary.LittleEndian.PutUint32(out[8:12], s[2]+x2)
+	binary.LittleEndian.PutUint32(out[12:16], s[3]+x3)
+	binary.LittleEndian.PutUint32(out[16:20], s[4]+x4)
+	binary.LittleEndian.PutUint32(out[20:24], s[5]+x5)
+	binary.LittleEndian.PutUint32(out[24:28], s[6]+x6)
+	binary.LittleEndian.PutUint32(out[28:32], s[7]+x7)
+	binary.LittleEndian.PutUint32(out[32:36], s[8]+x8)
+	binary.LittleEndian.PutUint32(out[36:40], s[9]+x9)
+	binary.LittleEndian.PutUint32(out[40:44], s[10]+x10)
+	binary.LittleEndian.PutUint32(out[44:48], s[11]+x11)
+	binary.LittleEndian.PutUint32(out[48:52], s[12]+x12)
+	binary.LittleEndian.PutUint32(out[52:56], s[13]+x13)
+	binary.LittleEndian.PutUint32(out[56:60], s[14]+x14)
+	binary.LittleEndian.PutUint32(out[60:64], s[15]+x15)
+}