go fmt

hash/sm3/compress.go

@@ -1,246 +1,245 @@
 package sm3
 
 func rotl32(count uint32, val uint32) uint32 {
-    return (val << count) | (val >> (32 - count))
+	return (val << count) | (val >> (32 - count))
 }
 
 // compression
 func p0(X uint32) uint32 {
-    return X ^ rotl32(9, X) ^ rotl32(17, X)
+	return X ^ rotl32(9, X) ^ rotl32(17, X)
 }
 
 // expansion
 func p1(X uint32) uint32 {
-    return X ^ rotl32(15, X) ^ rotl32(23, X)
+	return X ^ rotl32(15, X) ^ rotl32(23, X)
 }
 
 func ff1(X uint32, Y uint32, Z uint32) uint32 {
-    return (X & Y) | ((X | Y) & Z)
+	return (X & Y) | ((X | Y) & Z)
 }
 
 func gg1(X uint32, Y uint32, Z uint32) uint32 {
-    return (X & Y) ^ ((^X) & Z)  // Can be also (Z ^ (X & (Y ^ Z)))
+	return (X & Y) ^ ((^X) & Z) // Can be also (Z ^ (X & (Y ^ Z)))
 }
 
 func r1(
-    A uint32, B *uint32, C uint32, D *uint32, E uint32, F *uint32,
-    G uint32, H *uint32, TJ uint32, Wi uint32, Wj uint32) {
-
-    A12 := rotl32(12, A)
-    SS1 := rotl32(7, A12+E+TJ)
-    TT1 := (A ^ *B ^ C) + *D + (SS1 ^ A12) + Wj
-    TT2 := (E ^ *F ^ G) + *H + SS1 + Wi
-
-    *B = rotl32(9, *B)
-    *D = TT1
-    *F = rotl32(19, *F)
-    *H = p0(TT2)
+	A uint32, B *uint32, C uint32, D *uint32, E uint32, F *uint32,
+	G uint32, H *uint32, TJ uint32, Wi uint32, Wj uint32) {
+
+	A12 := rotl32(12, A)
+	SS1 := rotl32(7, A12+E+TJ)
+	TT1 := (A ^ *B ^ C) + *D + (SS1 ^ A12) + Wj
+	TT2 := (E ^ *F ^ G) + *H + SS1 + Wi
+
+	*B = rotl32(9, *B)
+	*D = TT1
+	*F = rotl32(19, *F)
+	*H = p0(TT2)
 }
 
 func r2(
-    A uint32, B *uint32, C uint32, D *uint32, E uint32, F *uint32,
-    G uint32, H *uint32, TJ uint32, Wi uint32, Wj uint32) {
-
-    A12 := rotl32(12, A)
-    SS1 := rotl32(7, A12+E+TJ)
-    TT1 := ff1(A, *B, C) + *D + (SS1 ^ A12) + Wj
-    TT2 := gg1(E, *F, G) + *H + SS1 + Wi
-
-    *B = rotl32(9, *B)
-    *D = TT1
-    *F = rotl32(19, *F)
-    *H = p0(TT2)
+	A uint32, B *uint32, C uint32, D *uint32, E uint32, F *uint32,
+	G uint32, H *uint32, TJ uint32, Wi uint32, Wj uint32) {
+
+	A12 := rotl32(12, A)
+	SS1 := rotl32(7, A12+E+TJ)
+	TT1 := ff1(A, *B, C) + *D + (SS1 ^ A12) + Wj
+	TT2 := gg1(E, *F, G) + *H + SS1 + Wi
+
+	*B = rotl32(9, *B)
+	*D = TT1
+	*F = rotl32(19, *F)
+	*H = p0(TT2)
 }
 
 func sm3e(W0 uint32, W7 uint32, W13 uint32, W3 uint32, W10 uint32) uint32 {
-    return p1(W0 ^ W7 ^ rotl32(15, W13)) ^ rotl32(7, W3) ^ W10
+	return p1(W0^W7^rotl32(15, W13)) ^ rotl32(7, W3) ^ W10
 }
 
 func loadBe32(x []byte) uint32 {
-    return uint32(x[3]) | (uint32(x[2]) << 8) | (uint32(x[1]) << 16) | (uint32(x[0]) << 24)
+	return uint32(x[3]) | (uint32(x[2]) << 8) | (uint32(x[1]) << 16) | (uint32(x[0]) << 24)
 }
 
 func store64Be(val []byte, x uint64) {
-    val[0] = byte(x>>56)
-    val[1] = byte(x>>48)
-    val[2] = byte(x>>40)
-    val[3] = byte(x>>32)
-    val[4] = byte(x>>24)
-    val[5] = byte(x>>16)
-    val[6] = byte(x>>8 )
-    val[7] = byte(x>>0 )
+	val[0] = byte(x >> 56)
+	val[1] = byte(x >> 48)
+	val[2] = byte(x >> 40)
+	val[3] = byte(x >> 32)
+	val[4] = byte(x >> 24)
+	val[5] = byte(x >> 16)
+	val[6] = byte(x >> 8)
+	val[7] = byte(x >> 0)
 }
 
 func store32Be(val []byte, x uint32) {
-    val[0] = byte(x>>24)
-    val[1] = byte(x>>16)
-    val[2] = byte(x>>8 )
-    val[3] = byte(x>>0 )
+	val[0] = byte(x >> 24)
+	val[1] = byte(x >> 16)
+	val[2] = byte(x >> 8)
+	val[3] = byte(x >> 0)
 }
 
 func (d *digest) compress(input []byte, blocks int) {
-    A := d.h[0]
-    B := d.h[1]
-    C := d.h[2]
-    D := d.h[3]
-    E := d.h[4]
-    F := d.h[5]
-    G := d.h[6]
-    H := d.h[7]
-
-    for i := 0; i < blocks; i++ {
-        next64Block := input[i*64:]
-
-        W00 := loadBe32(next64Block[0:])
-        W01 := loadBe32(next64Block[4:])
-        W02 := loadBe32(next64Block[8:])
-        W03 := loadBe32(next64Block[12:])
-        W04 := loadBe32(next64Block[16:])
-        W05 := loadBe32(next64Block[20:])
-        W06 := loadBe32(next64Block[24:])
-        W07 := loadBe32(next64Block[28:])
-        W08 := loadBe32(next64Block[32:])
-        W09 := loadBe32(next64Block[36:])
-        W10 := loadBe32(next64Block[40:])
-        W11 := loadBe32(next64Block[44:])
-        W12 := loadBe32(next64Block[48:])
-        W13 := loadBe32(next64Block[52:])
-        W14 := loadBe32(next64Block[56:])
-        W15 := loadBe32(next64Block[60:])
-        r1(A, &B, C, &D, E, &F, G, &H, 0x79CC4519, W00, W00^W04)
-        W00 = sm3e(W00, W07, W13, W03, W10)
-        r1(D, &A, B, &C, H, &E, F, &G, 0xF3988A32, W01, W01^W05)
-        W01 = sm3e(W01, W08, W14, W04, W11)
-        r1(C, &D, A, &B, G, &H, E, &F, 0xE7311465, W02, W02^W06)
-        W02 = sm3e(W02, W09, W15, W05, W12)
-        r1(B, &C, D, &A, F, &G, H, &E, 0xCE6228CB, W03, W03^W07)
-        W03 = sm3e(W03, W10, W00, W06, W13)
-        r1(A, &B, C, &D, E, &F, G, &H, 0x9CC45197, W04, W04^W08)
-        W04 = sm3e(W04, W11, W01, W07, W14)
-        r1(D, &A, B, &C, H, &E, F, &G, 0x3988A32F, W05, W05^W09)
-        W05 = sm3e(W05, W12, W02, W08, W15)
-        r1(C, &D, A, &B, G, &H, E, &F, 0x7311465E, W06, W06^W10)
-        W06 = sm3e(W06, W13, W03, W09, W00)
-        r1(B, &C, D, &A, F, &G, H, &E, 0xE6228CBC, W07, W07^W11)
-        W07 = sm3e(W07, W14, W04, W10, W01)
-        r1(A, &B, C, &D, E, &F, G, &H, 0xCC451979, W08, W08^W12)
-        W08 = sm3e(W08, W15, W05, W11, W02)
-        r1(D, &A, B, &C, H, &E, F, &G, 0x988A32F3, W09, W09^W13)
-        W09 = sm3e(W09, W00, W06, W12, W03)
-        r1(C, &D, A, &B, G, &H, E, &F, 0x311465E7, W10, W10^W14)
-        W10 = sm3e(W10, W01, W07, W13, W04)
-        r1(B, &C, D, &A, F, &G, H, &E, 0x6228CBCE, W11, W11^W15)
-        W11 = sm3e(W11, W02, W08, W14, W05)
-        r1(A, &B, C, &D, E, &F, G, &H, 0xC451979C, W12, W12^W00)
-        W12 = sm3e(W12, W03, W09, W15, W06)
-        r1(D, &A, B, &C, H, &E, F, &G, 0x88A32F39, W13, W13^W01)
-        W13 = sm3e(W13, W04, W10, W00, W07)
-        r1(C, &D, A, &B, G, &H, E, &F, 0x11465E73, W14, W14^W02)
-        W14 = sm3e(W14, W05, W11, W01, W08)
-        r1(B, &C, D, &A, F, &G, H, &E, 0x228CBCE6, W15, W15^W03)
-        W15 = sm3e(W15, W06, W12, W02, W09)
-        r2(A, &B, C, &D, E, &F, G, &H, 0x9D8A7A87, W00, W00^W04)
-        W00 = sm3e(W00, W07, W13, W03, W10)
-        r2(D, &A, B, &C, H, &E, F, &G, 0x3B14F50F, W01, W01^W05)
-        W01 = sm3e(W01, W08, W14, W04, W11)
-        r2(C, &D, A, &B, G, &H, E, &F, 0x7629EA1E, W02, W02^W06)
-        W02 = sm3e(W02, W09, W15, W05, W12)
-        r2(B, &C, D, &A, F, &G, H, &E, 0xEC53D43C, W03, W03^W07)
-        W03 = sm3e(W03, W10, W00, W06, W13)
-        r2(A, &B, C, &D, E, &F, G, &H, 0xD8A7A879, W04, W04^W08)
-        W04 = sm3e(W04, W11, W01, W07, W14)
-        r2(D, &A, B, &C, H, &E, F, &G, 0xB14F50F3, W05, W05^W09)
-        W05 = sm3e(W05, W12, W02, W08, W15)
-        r2(C, &D, A, &B, G, &H, E, &F, 0x629EA1E7, W06, W06^W10)
-        W06 = sm3e(W06, W13, W03, W09, W00)
-        r2(B, &C, D, &A, F, &G, H, &E, 0xC53D43CE, W07, W07^W11)
-        W07 = sm3e(W07, W14, W04, W10, W01)
-        r2(A, &B, C, &D, E, &F, G, &H, 0x8A7A879D, W08, W08^W12)
-        W08 = sm3e(W08, W15, W05, W11, W02)
-        r2(D, &A, B, &C, H, &E, F, &G, 0x14F50F3B, W09, W09^W13)
-        W09 = sm3e(W09, W00, W06, W12, W03)
-        r2(C, &D, A, &B, G, &H, E, &F, 0x29EA1E76, W10, W10^W14)
-        W10 = sm3e(W10, W01, W07, W13, W04)
-        r2(B, &C, D, &A, F, &G, H, &E, 0x53D43CEC, W11, W11^W15)
-        W11 = sm3e(W11, W02, W08, W14, W05)
-        r2(A, &B, C, &D, E, &F, G, &H, 0xA7A879D8, W12, W12^W00)
-        W12 = sm3e(W12, W03, W09, W15, W06)
-        r2(D, &A, B, &C, H, &E, F, &G, 0x4F50F3B1, W13, W13^W01)
-        W13 = sm3e(W13, W04, W10, W00, W07)
-        r2(C, &D, A, &B, G, &H, E, &F, 0x9EA1E762, W14, W14^W02)
-        W14 = sm3e(W14, W05, W11, W01, W08)
-        r2(B, &C, D, &A, F, &G, H, &E, 0x3D43CEC5, W15, W15^W03)
-        W15 = sm3e(W15, W06, W12, W02, W09)
-        r2(A, &B, C, &D, E, &F, G, &H, 0x7A879D8A, W00, W00^W04)
-        W00 = sm3e(W00, W07, W13, W03, W10)
-        r2(D, &A, B, &C, H, &E, F, &G, 0xF50F3B14, W01, W01^W05)
-        W01 = sm3e(W01, W08, W14, W04, W11)
-        r2(C, &D, A, &B, G, &H, E, &F, 0xEA1E7629, W02, W02^W06)
-        W02 = sm3e(W02, W09, W15, W05, W12)
-        r2(B, &C, D, &A, F, &G, H, &E, 0xD43CEC53, W03, W03^W07)
-        W03 = sm3e(W03, W10, W00, W06, W13)
-        r2(A, &B, C, &D, E, &F, G, &H, 0xA879D8A7, W04, W04^W08)
-        W04 = sm3e(W04, W11, W01, W07, W14)
-        r2(D, &A, B, &C, H, &E, F, &G, 0x50F3B14F, W05, W05^W09)
-        W05 = sm3e(W05, W12, W02, W08, W15)
-        r2(C, &D, A, &B, G, &H, E, &F, 0xA1E7629E, W06, W06^W10)
-        W06 = sm3e(W06, W13, W03, W09, W00)
-        r2(B, &C, D, &A, F, &G, H, &E, 0x43CEC53D, W07, W07^W11)
-        W07 = sm3e(W07, W14, W04, W10, W01)
-        r2(A, &B, C, &D, E, &F, G, &H, 0x879D8A7A, W08, W08^W12)
-        W08 = sm3e(W08, W15, W05, W11, W02)
-        r2(D, &A, B, &C, H, &E, F, &G, 0x0F3B14F5, W09, W09^W13)
-        W09 = sm3e(W09, W00, W06, W12, W03)
-        r2(C, &D, A, &B, G, &H, E, &F, 0x1E7629EA, W10, W10^W14)
-        W10 = sm3e(W10, W01, W07, W13, W04)
-        r2(B, &C, D, &A, F, &G, H, &E, 0x3CEC53D4, W11, W11^W15)
-        W11 = sm3e(W11, W02, W08, W14, W05)
-        r2(A, &B, C, &D, E, &F, G, &H, 0x79D8A7A8, W12, W12^W00)
-        W12 = sm3e(W12, W03, W09, W15, W06)
-        r2(D, &A, B, &C, H, &E, F, &G, 0xF3B14F50, W13, W13^W01)
-        W13 = sm3e(W13, W04, W10, W00, W07)
-        r2(C, &D, A, &B, G, &H, E, &F, 0xE7629EA1, W14, W14^W02)
-        W14 = sm3e(W14, W05, W11, W01, W08)
-        r2(B, &C, D, &A, F, &G, H, &E, 0xCEC53D43, W15, W15^W03)
-        W15 = sm3e(W15, W06, W12, W02, W09)
-        r2(A, &B, C, &D, E, &F, G, &H, 0x9D8A7A87, W00, W00^W04)
-        W00 = sm3e(W00, W07, W13, W03, W10)
-        r2(D, &A, B, &C, H, &E, F, &G, 0x3B14F50F, W01, W01^W05)
-        W01 = sm3e(W01, W08, W14, W04, W11)
-        r2(C, &D, A, &B, G, &H, E, &F, 0x7629EA1E, W02, W02^W06)
-        W02 = sm3e(W02, W09, W15, W05, W12)
-        r2(B, &C, D, &A, F, &G, H, &E, 0xEC53D43C, W03, W03^W07)
-        W03 = sm3e(W03, W10, W00, W06, W13)
-        r2(A, &B, C, &D, E, &F, G, &H, 0xD8A7A879, W04, W04^W08)
-        r2(D, &A, B, &C, H, &E, F, &G, 0xB14F50F3, W05, W05^W09)
-        r2(C, &D, A, &B, G, &H, E, &F, 0x629EA1E7, W06, W06^W10)
-        r2(B, &C, D, &A, F, &G, H, &E, 0xC53D43CE, W07, W07^W11)
-        r2(A, &B, C, &D, E, &F, G, &H, 0x8A7A879D, W08, W08^W12)
-        r2(D, &A, B, &C, H, &E, F, &G, 0x14F50F3B, W09, W09^W13)
-        r2(C, &D, A, &B, G, &H, E, &F, 0x29EA1E76, W10, W10^W14)
-        r2(B, &C, D, &A, F, &G, H, &E, 0x53D43CEC, W11, W11^W15)
-        r2(A, &B, C, &D, E, &F, G, &H, 0xA7A879D8, W12, W12^W00)
-        r2(D, &A, B, &C, H, &E, F, &G, 0x4F50F3B1, W13, W13^W01)
-        r2(C, &D, A, &B, G, &H, E, &F, 0x9EA1E762, W14, W14^W02)
-        r2(B, &C, D, &A, F, &G, H, &E, 0x3D43CEC5, W15, W15^W03)
-
-        d.h[0] ^= A
-        d.h[1] ^= B
-        d.h[2] ^= C
-        d.h[3] ^= D
-        d.h[4] ^= E
-        d.h[5] ^= F
-        d.h[6] ^= G
-        d.h[7] ^= H
-
-        A = d.h[0]
-        B = d.h[1]
-        C = d.h[2]
-        D = d.h[3]
-        E = d.h[4]
-        F = d.h[5]
-        G = d.h[6]
-        H = d.h[7]
-    }
+	A := d.h[0]
+	B := d.h[1]
+	C := d.h[2]
+	D := d.h[3]
+	E := d.h[4]
+	F := d.h[5]
+	G := d.h[6]
+	H := d.h[7]
+
+	for i := 0; i < blocks; i++ {
+		next64Block := input[i*64:]
+
+		W00 := loadBe32(next64Block[0:])
+		W01 := loadBe32(next64Block[4:])
+		W02 := loadBe32(next64Block[8:])
+		W03 := loadBe32(next64Block[12:])
+		W04 := loadBe32(next64Block[16:])
+		W05 := loadBe32(next64Block[20:])
+		W06 := loadBe32(next64Block[24:])
+		W07 := loadBe32(next64Block[28:])
+		W08 := loadBe32(next64Block[32:])
+		W09 := loadBe32(next64Block[36:])
+		W10 := loadBe32(next64Block[40:])
+		W11 := loadBe32(next64Block[44:])
+		W12 := loadBe32(next64Block[48:])
+		W13 := loadBe32(next64Block[52:])
+		W14 := loadBe32(next64Block[56:])
+		W15 := loadBe32(next64Block[60:])
+		r1(A, &B, C, &D, E, &F, G, &H, 0x79CC4519, W00, W00^W04)
+		W00 = sm3e(W00, W07, W13, W03, W10)
+		r1(D, &A, B, &C, H, &E, F, &G, 0xF3988A32, W01, W01^W05)
+		W01 = sm3e(W01, W08, W14, W04, W11)
+		r1(C, &D, A, &B, G, &H, E, &F, 0xE7311465, W02, W02^W06)
+		W02 = sm3e(W02, W09, W15, W05, W12)
+		r1(B, &C, D, &A, F, &G, H, &E, 0xCE6228CB, W03, W03^W07)
+		W03 = sm3e(W03, W10, W00, W06, W13)
+		r1(A, &B, C, &D, E, &F, G, &H, 0x9CC45197, W04, W04^W08)
+		W04 = sm3e(W04, W11, W01, W07, W14)
+		r1(D, &A, B, &C, H, &E, F, &G, 0x3988A32F, W05, W05^W09)
+		W05 = sm3e(W05, W12, W02, W08, W15)
+		r1(C, &D, A, &B, G, &H, E, &F, 0x7311465E, W06, W06^W10)
+		W06 = sm3e(W06, W13, W03, W09, W00)
+		r1(B, &C, D, &A, F, &G, H, &E, 0xE6228CBC, W07, W07^W11)
+		W07 = sm3e(W07, W14, W04, W10, W01)
+		r1(A, &B, C, &D, E, &F, G, &H, 0xCC451979, W08, W08^W12)
+		W08 = sm3e(W08, W15, W05, W11, W02)
+		r1(D, &A, B, &C, H, &E, F, &G, 0x988A32F3, W09, W09^W13)
+		W09 = sm3e(W09, W00, W06, W12, W03)
+		r1(C, &D, A, &B, G, &H, E, &F, 0x311465E7, W10, W10^W14)
+		W10 = sm3e(W10, W01, W07, W13, W04)
+		r1(B, &C, D, &A, F, &G, H, &E, 0x6228CBCE, W11, W11^W15)
+		W11 = sm3e(W11, W02, W08, W14, W05)
+		r1(A, &B, C, &D, E, &F, G, &H, 0xC451979C, W12, W12^W00)
+		W12 = sm3e(W12, W03, W09, W15, W06)
+		r1(D, &A, B, &C, H, &E, F, &G, 0x88A32F39, W13, W13^W01)
+		W13 = sm3e(W13, W04, W10, W00, W07)
+		r1(C, &D, A, &B, G, &H, E, &F, 0x11465E73, W14, W14^W02)
+		W14 = sm3e(W14, W05, W11, W01, W08)
+		r1(B, &C, D, &A, F, &G, H, &E, 0x228CBCE6, W15, W15^W03)
+		W15 = sm3e(W15, W06, W12, W02, W09)
+		r2(A, &B, C, &D, E, &F, G, &H, 0x9D8A7A87, W00, W00^W04)
+		W00 = sm3e(W00, W07, W13, W03, W10)
+		r2(D, &A, B, &C, H, &E, F, &G, 0x3B14F50F, W01, W01^W05)
+		W01 = sm3e(W01, W08, W14, W04, W11)
+		r2(C, &D, A, &B, G, &H, E, &F, 0x7629EA1E, W02, W02^W06)
+		W02 = sm3e(W02, W09, W15, W05, W12)
+		r2(B, &C, D, &A, F, &G, H, &E, 0xEC53D43C, W03, W03^W07)
+		W03 = sm3e(W03, W10, W00, W06, W13)
+		r2(A, &B, C, &D, E, &F, G, &H, 0xD8A7A879, W04, W04^W08)
+		W04 = sm3e(W04, W11, W01, W07, W14)
+		r2(D, &A, B, &C, H, &E, F, &G, 0xB14F50F3, W05, W05^W09)
+		W05 = sm3e(W05, W12, W02, W08, W15)
+		r2(C, &D, A, &B, G, &H, E, &F, 0x629EA1E7, W06, W06^W10)
+		W06 = sm3e(W06, W13, W03, W09, W00)
+		r2(B, &C, D, &A, F, &G, H, &E, 0xC53D43CE, W07, W07^W11)
+		W07 = sm3e(W07, W14, W04, W10, W01)
+		r2(A, &B, C, &D, E, &F, G, &H, 0x8A7A879D, W08, W08^W12)
+		W08 = sm3e(W08, W15, W05, W11, W02)
+		r2(D, &A, B, &C, H, &E, F, &G, 0x14F50F3B, W09, W09^W13)
+		W09 = sm3e(W09, W00, W06, W12, W03)
+		r2(C, &D, A, &B, G, &H, E, &F, 0x29EA1E76, W10, W10^W14)
+		W10 = sm3e(W10, W01, W07, W13, W04)
+		r2(B, &C, D, &A, F, &G, H, &E, 0x53D43CEC, W11, W11^W15)
+		W11 = sm3e(W11, W02, W08, W14, W05)
+		r2(A, &B, C, &D, E, &F, G, &H, 0xA7A879D8, W12, W12^W00)
+		W12 = sm3e(W12, W03, W09, W15, W06)
+		r2(D, &A, B, &C, H, &E, F, &G, 0x4F50F3B1, W13, W13^W01)
+		W13 = sm3e(W13, W04, W10, W00, W07)
+		r2(C, &D, A, &B, G, &H, E, &F, 0x9EA1E762, W14, W14^W02)
+		W14 = sm3e(W14, W05, W11, W01, W08)
+		r2(B, &C, D, &A, F, &G, H, &E, 0x3D43CEC5, W15, W15^W03)
+		W15 = sm3e(W15, W06, W12, W02, W09)
+		r2(A, &B, C, &D, E, &F, G, &H, 0x7A879D8A, W00, W00^W04)
+		W00 = sm3e(W00, W07, W13, W03, W10)
+		r2(D, &A, B, &C, H, &E, F, &G, 0xF50F3B14, W01, W01^W05)
+		W01 = sm3e(W01, W08, W14, W04, W11)
+		r2(C, &D, A, &B, G, &H, E, &F, 0xEA1E7629, W02, W02^W06)
+		W02 = sm3e(W02, W09, W15, W05, W12)
+		r2(B, &C, D, &A, F, &G, H, &E, 0xD43CEC53, W03, W03^W07)
+		W03 = sm3e(W03, W10, W00, W06, W13)
+		r2(A, &B, C, &D, E, &F, G, &H, 0xA879D8A7, W04, W04^W08)
+		W04 = sm3e(W04, W11, W01, W07, W14)
+		r2(D, &A, B, &C, H, &E, F, &G, 0x50F3B14F, W05, W05^W09)
+		W05 = sm3e(W05, W12, W02, W08, W15)
+		r2(C, &D, A, &B, G, &H, E, &F, 0xA1E7629E, W06, W06^W10)
+		W06 = sm3e(W06, W13, W03, W09, W00)
+		r2(B, &C, D, &A, F, &G, H, &E, 0x43CEC53D, W07, W07^W11)
+		W07 = sm3e(W07, W14, W04, W10, W01)
+		r2(A, &B, C, &D, E, &F, G, &H, 0x879D8A7A, W08, W08^W12)
+		W08 = sm3e(W08, W15, W05, W11, W02)
+		r2(D, &A, B, &C, H, &E, F, &G, 0x0F3B14F5, W09, W09^W13)
+		W09 = sm3e(W09, W00, W06, W12, W03)
+		r2(C, &D, A, &B, G, &H, E, &F, 0x1E7629EA, W10, W10^W14)
+		W10 = sm3e(W10, W01, W07, W13, W04)
+		r2(B, &C, D, &A, F, &G, H, &E, 0x3CEC53D4, W11, W11^W15)
+		W11 = sm3e(W11, W02, W08, W14, W05)
+		r2(A, &B, C, &D, E, &F, G, &H, 0x79D8A7A8, W12, W12^W00)
+		W12 = sm3e(W12, W03, W09, W15, W06)
+		r2(D, &A, B, &C, H, &E, F, &G, 0xF3B14F50, W13, W13^W01)
+		W13 = sm3e(W13, W04, W10, W00, W07)
+		r2(C, &D, A, &B, G, &H, E, &F, 0xE7629EA1, W14, W14^W02)
+		W14 = sm3e(W14, W05, W11, W01, W08)
+		r2(B, &C, D, &A, F, &G, H, &E, 0xCEC53D43, W15, W15^W03)
+		W15 = sm3e(W15, W06, W12, W02, W09)
+		r2(A, &B, C, &D, E, &F, G, &H, 0x9D8A7A87, W00, W00^W04)
+		W00 = sm3e(W00, W07, W13, W03, W10)
+		r2(D, &A, B, &C, H, &E, F, &G, 0x3B14F50F, W01, W01^W05)
+		W01 = sm3e(W01, W08, W14, W04, W11)
+		r2(C, &D, A, &B, G, &H, E, &F, 0x7629EA1E, W02, W02^W06)
+		W02 = sm3e(W02, W09, W15, W05, W12)
+		r2(B, &C, D, &A, F, &G, H, &E, 0xEC53D43C, W03, W03^W07)
+		W03 = sm3e(W03, W10, W00, W06, W13)
+		r2(A, &B, C, &D, E, &F, G, &H, 0xD8A7A879, W04, W04^W08)
+		r2(D, &A, B, &C, H, &E, F, &G, 0xB14F50F3, W05, W05^W09)
+		r2(C, &D, A, &B, G, &H, E, &F, 0x629EA1E7, W06, W06^W10)
+		r2(B, &C, D, &A, F, &G, H, &E, 0xC53D43CE, W07, W07^W11)
+		r2(A, &B, C, &D, E, &F, G, &H, 0x8A7A879D, W08, W08^W12)
+		r2(D, &A, B, &C, H, &E, F, &G, 0x14F50F3B, W09, W09^W13)
+		r2(C, &D, A, &B, G, &H, E, &F, 0x29EA1E76, W10, W10^W14)
+		r2(B, &C, D, &A, F, &G, H, &E, 0x53D43CEC, W11, W11^W15)
+		r2(A, &B, C, &D, E, &F, G, &H, 0xA7A879D8, W12, W12^W00)
+		r2(D, &A, B, &C, H, &E, F, &G, 0x4F50F3B1, W13, W13^W01)
+		r2(C, &D, A, &B, G, &H, E, &F, 0x9EA1E762, W14, W14^W02)
+		r2(B, &C, D, &A, F, &G, H, &E, 0x3D43CEC5, W15, W15^W03)
+
+		d.h[0] ^= A
+		d.h[1] ^= B
+		d.h[2] ^= C
+		d.h[3] ^= D
+		d.h[4] ^= E
+		d.h[5] ^= F
+		d.h[6] ^= G
+		d.h[7] ^= H
+
+		A = d.h[0]
+		B = d.h[1]
+		C = d.h[2]
+		D = d.h[3]
+		E = d.h[4]
+		F = d.h[5]
+		G = d.h[6]
+		H = d.h[7]
+	}
 }
-

hash/sm3/sm3.go

@@ -4,18 +4,18 @@
 package sm3
 
 import (
-    "hash"
+	"hash"
 )
 
 const (
-    init0 = 0x7380166F
-    init1 = 0x4914B2B9
-    init2 = 0x172442D7
-    init3 = 0xDA8A0600
-    init4 = 0xA96F30BC
-    init5 = 0x163138AA
-    init6 = 0xE38DEE4D
-    init7 = 0xB0FB0E4E
+	init0 = 0x7380166F
+	init1 = 0x4914B2B9
+	init2 = 0x172442D7
+	init3 = 0xDA8A0600
+	init4 = 0xA96F30BC
+	init5 = 0x163138AA
+	init6 = 0xE38DEE4D
+	init7 = 0xB0FB0E4E
 )
 
 // The size of a SM-3 checksum in bytes.
@@ -26,15 +26,15 @@ const BlockSize int = 64
 
 // digest represents the partial evaluation of a checksum.
 type digest struct {
-    h [8]uint32
-    len uint64
-    b [BlockSize]byte
+	h   [8]uint32
+	len uint64
+	b   [BlockSize]byte
 }
 
 func New() hash.Hash {
-    d := new(digest)
-    d.Reset()
-    return d
+	d := new(digest)
+	d.Reset()
+	return d
 }
 
 func (d *digest) BlockSize() int { return BlockSize }
@@ -44,63 +44,67 @@ func (d *digest) Size() int { return Size }
 func (d *digest) Init() { d.Reset() }
 
 func (d *digest) Reset() {
-    d.h[0] = init0
-    d.h[1] = init1
-    d.h[2] = init2
-    d.h[3] = init3
-    d.h[4] = init4
-    d.h[5] = init5
-    d.h[6] = init6
-    d.h[7] = init7
-    d.len = 0
+	d.h[0] = init0
+	d.h[1] = init1
+	d.h[2] = init2
+	d.h[3] = init3
+	d.h[4] = init4
+	d.h[5] = init5
+	d.h[6] = init6
+	d.h[7] = init7
+	d.len = 0
 }
 
 func (d *digest) Write(input []byte) (nn int, err error) {
 
-    // current possition in the buffer
-    idx := int(d.len & uint64((d.BlockSize() - 1)))
-    d.len += uint64(len(input))
+	// current possition in the buffer
+	idx := int(d.len & uint64((d.BlockSize() - 1)))
+	d.len += uint64(len(input))
 
-    if len(input) + idx < d.BlockSize() {
-        copy(d.b[idx:], input)
-        return
-    }
+	if len(input)+idx < d.BlockSize() {
+		copy(d.b[idx:], input)
+		return
+	}
 
-    c := d.BlockSize() - idx
-    copy(d.b[idx:], input[:c])
-    d.compress(d.b[:], 1)
+	c := d.BlockSize() - idx
+	copy(d.b[idx:], input[:c])
+	d.compress(d.b[:], 1)
 
-    input = input[c:]
-    nblocks := int(len(input) / d.BlockSize())
-    d.compress(input[:], nblocks)
+	input = input[c:]
+	nblocks := int(len(input) / d.BlockSize())
+	d.compress(input[:], nblocks)
 
-    // this eventually could be done in d.compress
-    copy(d.b[:], input[nblocks*d.BlockSize():])
-    return
+	// this eventually could be done in d.compress
+	copy(d.b[:], input[nblocks*d.BlockSize():])
+	return
 }
 
 func (d *digest) Sum(in []byte) []byte {
-    var output [32]byte
-
-    // Copy context so that caller can keep updating
-    dc := *d
-
-    dc.Write(in)
-
-    idx := int(dc.len & uint64(dc.BlockSize() - 1))
-    for i:=idx+1; i<len(dc.b); i++ {dc.b[i] = 0}
-    dc.b[idx] = 0x80
-    if idx >= 56 {
-        dc.compress(dc.b[:], 1)
-        for i:=range (dc.b) {dc.b[i] = 0}
-    }
-
-    // add total bits
-    store64Be(dc.b[56:], dc.len * 8)
-
-    dc.compress(dc.b[:], 1)
-    for i:=0; i<Size/4; i++ {
-        store32Be(output[4*i:], dc.h[i])
-    }
-    return output[:]
+	var output [32]byte
+
+	// Copy context so that caller can keep updating
+	dc := *d
+
+	dc.Write(in)
+
+	idx := int(dc.len & uint64(dc.BlockSize()-1))
+	for i := idx + 1; i < len(dc.b); i++ {
+		dc.b[i] = 0
+	}
+	dc.b[idx] = 0x80
+	if idx >= 56 {
+		dc.compress(dc.b[:], 1)
+		for i := range dc.b {
+			dc.b[i] = 0
+		}
+	}
+
+	// add total bits
+	store64Be(dc.b[56:], dc.len*8)
+
+	dc.compress(dc.b[:], 1)
+	for i := 0; i < Size/4; i++ {
+		store32Be(output[4*i:], dc.h[i])
+	}
+	return output[:]
 }

rand/ctr_drbg.go

@@ -0,0 +1,53 @@
+import rand
+
+import (
+    "crypto/aes"
+    "crypto/cipher"
+)
+
+// Constants below correspond to AES-256, which is currently
+// the only block cipher supported.
+const {
+    Blocklen = 16
+    Keylen = 32
+}
+
+type CtrDrbg struct {
+    v uint
+    keylen uint // OZAPTF: is it needed?
+    counter uint
+    strength uint
+    resistance bool
+}
+
+func (c *CtrDrbg) update(data []byte) {
+
+}
+
+func New() *CtrDrbg {
+    c = new(CtrDrbg)
+    c.key = make([]byte, 0, Keylen)
+    c.v = make([]byte, 0, Blocklen)
+    // Security strength for AES-256 as per SP800-57, 5.6.1
+    c.strength = 256
+    return c
+}
+
+func (c *CtrDrbg) Init(entropy []byte, personalization []byte, strength uint) bool {
+
+    if len(entropy) < (c.strength/8) {
+        return nil
+    }
+
+    // does enropyt needs to have some minimal length?
+    seed := make([]byte, 0, c.strength / 8)
+
+    c.update(seed)
+    c.counter = 1
+    return c
+
+}
+func (c *CtrDrbg) Update() {}
+func (c *CtrDrbg) Read(b []byte) (n int, err error) {
+
+}

rand/ctr_drbg_test.go

@@ -0,0 +1,21 @@
+import rand
+
+import (
+    "testing"
+    "fmt"
+    "io"
+    "os"
+
+    "crypto/aes"
+    "crypto/cipher"
+)
+
+func TestNominal(t* testing.T) {
+    block, err := aes.NewCipher(key)
+    if err != nil {
+        panic(err)
+    }
+
+    stream := cipher.NewCTR(block, iv)
+    stream.XORKeyStream(pt, ct)
+}