-
WNafUtil
-
PRECOMP_NAME: String
-
DEFAULT_WINDOW_SIZE_CUTOFFS: int[]
-
EMPTY_BYTES: byte[]
-
EMPTY_INTS: int[]
-
EMPTY_POINTS: ECPoint[]
-
<clinit>(): void
-
<init>(): void
-
generateCompactNaf(BigInteger): int[]
-
generateCompactWindowNaf(int, BigInteger): int[]
-
generateJSF(BigInteger, BigInteger): byte[]
-
generateNaf(BigInteger): byte[]
-
generateWindowNaf(int, BigInteger): byte[]
-
getNafWeight(BigInteger): int
-
getWNafPreCompInfo(ECPoint): WNafPreCompInfo
-
getWNafPreCompInfo(PreCompInfo): WNafPreCompInfo
-
getWindowSize(int): int
-
getWindowSize(int, int[]): int
-
mapPointWithPrecomp(ECPoint, int, boolean, ECPointMap): ECPoint
-
precompute(ECPoint, int, boolean): WNafPreCompInfo
-
trim(byte[], int): byte[]
-
trim(int[], int): int[]
-
resizeTable(ECPoint[], int): ECPoint[]
-
public abstract class org.bouncycastle.math.ec.WNafUtil
minor version: 0
major version: 59
flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
this_class: org.bouncycastle.math.ec.WNafUtil
super_class: java.lang.Object
{
public static final java.lang.String PRECOMP_NAME;
descriptor: Ljava/lang/String;
flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
ConstantValue: "bc_wnaf"
private static final int[] DEFAULT_WINDOW_SIZE_CUTOFFS;
descriptor: [I
flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
private static final byte[] EMPTY_BYTES;
descriptor: [B
flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
private static final int[] EMPTY_INTS;
descriptor: [I
flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
private static final org.bouncycastle.math.ec.ECPoint[] EMPTY_POINTS;
descriptor: [Lorg/bouncycastle/math/ec/ECPoint;
flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
static void <clinit>();
descriptor: ()V
flags: (0x0008) ACC_STATIC
Code:
stack=4, locals=0, args_size=0
0: .line 9
bipush 6
newarray 10
dup
iconst_0
bipush 13
iastore
dup
iconst_1
bipush 41
iastore
dup
iconst_2
bipush 121
iastore
dup
iconst_3
sipush 337
iastore
dup
iconst_4
sipush 897
iastore
dup
iconst_5
sipush 2305
iastore
putstatic org.bouncycastle.math.ec.WNafUtil.DEFAULT_WINDOW_SIZE_CUTOFFS:[I
1: .line 11
iconst_0
newarray 8
putstatic org.bouncycastle.math.ec.WNafUtil.EMPTY_BYTES:[B
2: .line 12
iconst_0
newarray 10
putstatic org.bouncycastle.math.ec.WNafUtil.EMPTY_INTS:[I
3: .line 13
iconst_0
anewarray org.bouncycastle.math.ec.ECPoint
putstatic org.bouncycastle.math.ec.WNafUtil.EMPTY_POINTS:[Lorg/bouncycastle/math/ec/ECPoint;
return
LocalVariableTable:
Start End Slot Name Signature
public void <init>();
descriptor: ()V
flags: (0x0001) ACC_PUBLIC
Code:
stack=1, locals=1, args_size=1
start local 0 // org.bouncycastle.math.ec.WNafUtil this
0: .line 5
aload 0 /* this */
invokespecial java.lang.Object.<init>:()V
return
end local 0 // org.bouncycastle.math.ec.WNafUtil this
LocalVariableTable:
Start End Slot Name Signature
0 1 0 this Lorg/bouncycastle/math/ec/WNafUtil;
public static int[] generateCompactNaf(java.math.BigInteger);
descriptor: (Ljava/math/BigInteger;)[I
flags: (0x0009) ACC_PUBLIC, ACC_STATIC
Code:
stack=4, locals=10, args_size=1
start local 0 // java.math.BigInteger k
0: .line 17
aload 0 /* k */
invokevirtual java.math.BigInteger.bitLength:()I
bipush 16
iushr
ifeq 2
1: .line 19
new java.lang.IllegalArgumentException
dup
ldc "'k' must have bitlength < 2^16"
invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
athrow
2: .line 21
StackMap locals:
StackMap stack:
aload 0 /* k */
invokevirtual java.math.BigInteger.signum:()I
ifne 4
3: .line 23
getstatic org.bouncycastle.math.ec.WNafUtil.EMPTY_INTS:[I
areturn
4: .line 26
StackMap locals:
StackMap stack:
aload 0 /* k */
iconst_1
invokevirtual java.math.BigInteger.shiftLeft:(I)Ljava/math/BigInteger;
aload 0 /* k */
invokevirtual java.math.BigInteger.add:(Ljava/math/BigInteger;)Ljava/math/BigInteger;
astore 1 /* _3k */
start local 1 // java.math.BigInteger _3k
5: .line 28
aload 1 /* _3k */
invokevirtual java.math.BigInteger.bitLength:()I
istore 2 /* bits */
start local 2 // int bits
6: .line 29
iload 2 /* bits */
iconst_1
ishr
newarray 10
astore 3 /* naf */
start local 3 // int[] naf
7: .line 31
aload 1 /* _3k */
aload 0 /* k */
invokevirtual java.math.BigInteger.xor:(Ljava/math/BigInteger;)Ljava/math/BigInteger;
astore 4 /* diff */
start local 4 // java.math.BigInteger diff
8: .line 33
iload 2 /* bits */
iconst_1
isub
istore 5 /* highBit */
start local 5 // int highBit
9: iconst_0
istore 6 /* length */
start local 6 // int length
10: iconst_0
istore 7 /* zeroes */
start local 7 // int zeroes
11: .line 34
iconst_1
istore 8 /* i */
start local 8 // int i
12: goto 23
13: .line 36
StackMap locals: java.math.BigInteger java.math.BigInteger int int[] java.math.BigInteger int int int int
StackMap stack:
aload 4 /* diff */
iload 8 /* i */
invokevirtual java.math.BigInteger.testBit:(I)Z
ifne 16
14: .line 38
iinc 7 /* zeroes */ 1
15: .line 39
goto 22
16: .line 42
StackMap locals:
StackMap stack:
aload 0 /* k */
iload 8 /* i */
invokevirtual java.math.BigInteger.testBit:(I)Z
ifeq 17
iconst_m1
goto 18
StackMap locals:
StackMap stack:
17: iconst_1
StackMap locals:
StackMap stack: int
18: istore 9 /* digit */
start local 9 // int digit
19: .line 43
aload 3 /* naf */
iload 6 /* length */
iinc 6 /* length */ 1
iload 9 /* digit */
bipush 16
ishl
iload 7 /* zeroes */
ior
iastore
20: .line 44
iconst_1
istore 7 /* zeroes */
21: .line 45
iinc 8 /* i */ 1
end local 9 // int digit
22: .line 34
StackMap locals:
StackMap stack:
iinc 8 /* i */ 1
StackMap locals:
StackMap stack:
23: iload 8 /* i */
iload 5 /* highBit */
if_icmplt 13
end local 8 // int i
24: .line 48
aload 3 /* naf */
iload 6 /* length */
iinc 6 /* length */ 1
ldc 65536
iload 7 /* zeroes */
ior
iastore
25: .line 50
aload 3 /* naf */
arraylength
iload 6 /* length */
if_icmple 27
26: .line 52
aload 3 /* naf */
iload 6 /* length */
invokestatic org.bouncycastle.math.ec.WNafUtil.trim:([II)[I
astore 3 /* naf */
27: .line 55
StackMap locals:
StackMap stack:
aload 3 /* naf */
areturn
end local 7 // int zeroes
end local 6 // int length
end local 5 // int highBit
end local 4 // java.math.BigInteger diff
end local 3 // int[] naf
end local 2 // int bits
end local 1 // java.math.BigInteger _3k
end local 0 // java.math.BigInteger k
LocalVariableTable:
Start End Slot Name Signature
0 28 0 k Ljava/math/BigInteger;
5 28 1 _3k Ljava/math/BigInteger;
6 28 2 bits I
7 28 3 naf [I
8 28 4 diff Ljava/math/BigInteger;
9 28 5 highBit I
10 28 6 length I
11 28 7 zeroes I
12 24 8 i I
19 22 9 digit I
MethodParameters:
Name Flags
k
public static int[] generateCompactWindowNaf(int, java.math.BigInteger);
descriptor: (ILjava/math/BigInteger;)[I
flags: (0x0009) ACC_PUBLIC, ACC_STATIC
Code:
stack=4, locals=11, args_size=2
start local 0 // int width
start local 1 // java.math.BigInteger k
0: .line 60
iload 0 /* width */
iconst_2
if_icmpne 2
1: .line 62
aload 1 /* k */
invokestatic org.bouncycastle.math.ec.WNafUtil.generateCompactNaf:(Ljava/math/BigInteger;)[I
areturn
2: .line 65
StackMap locals:
StackMap stack:
iload 0 /* width */
iconst_2
if_icmplt 3
iload 0 /* width */
bipush 16
if_icmple 4
3: .line 67
StackMap locals:
StackMap stack:
new java.lang.IllegalArgumentException
dup
ldc "'width' must be in the range [2, 16]"
invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
athrow
4: .line 69
StackMap locals:
StackMap stack:
aload 1 /* k */
invokevirtual java.math.BigInteger.bitLength:()I
bipush 16
iushr
ifeq 6
5: .line 71
new java.lang.IllegalArgumentException
dup
ldc "'k' must have bitlength < 2^16"
invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
athrow
6: .line 73
StackMap locals:
StackMap stack:
aload 1 /* k */
invokevirtual java.math.BigInteger.signum:()I
ifne 8
7: .line 75
getstatic org.bouncycastle.math.ec.WNafUtil.EMPTY_INTS:[I
areturn
8: .line 78
StackMap locals:
StackMap stack:
aload 1 /* k */
invokevirtual java.math.BigInteger.bitLength:()I
iload 0 /* width */
idiv
iconst_1
iadd
newarray 10
astore 2 /* wnaf */
start local 2 // int[] wnaf
9: .line 81
iconst_1
iload 0 /* width */
ishl
istore 3 /* pow2 */
start local 3 // int pow2
10: .line 82
iload 3 /* pow2 */
iconst_1
isub
istore 4 /* mask */
start local 4 // int mask
11: .line 83
iload 3 /* pow2 */
iconst_1
iushr
istore 5 /* sign */
start local 5 // int sign
12: .line 85
iconst_0
istore 6 /* carry */
start local 6 // boolean carry
13: .line 86
iconst_0
istore 7 /* length */
start local 7 // int length
14: iconst_0
istore 8 /* pos */
start local 8 // int pos
15: .line 88
goto 33
16: .line 90
StackMap locals: int java.math.BigInteger int[] int int int int int int
StackMap stack:
aload 1 /* k */
iload 8 /* pos */
invokevirtual java.math.BigInteger.testBit:(I)Z
iload 6 /* carry */
if_icmpne 19
17: .line 92
iinc 8 /* pos */ 1
18: .line 93
goto 33
19: .line 96
StackMap locals:
StackMap stack:
aload 1 /* k */
iload 8 /* pos */
invokevirtual java.math.BigInteger.shiftRight:(I)Ljava/math/BigInteger;
astore 1 /* k */
20: .line 98
aload 1 /* k */
invokevirtual java.math.BigInteger.intValue:()I
iload 4 /* mask */
iand
istore 9 /* digit */
start local 9 // int digit
21: .line 99
iload 6 /* carry */
ifeq 23
22: .line 101
iinc 9 /* digit */ 1
23: .line 104
StackMap locals: int
StackMap stack:
iload 9 /* digit */
iload 5 /* sign */
iand
ifeq 24
iconst_1
goto 25
StackMap locals:
StackMap stack:
24: iconst_0
StackMap locals:
StackMap stack: int
25: istore 6 /* carry */
26: .line 105
iload 6 /* carry */
ifeq 28
27: .line 107
iload 9 /* digit */
iload 3 /* pow2 */
isub
istore 9 /* digit */
28: .line 110
StackMap locals:
StackMap stack:
iload 7 /* length */
ifle 29
iload 8 /* pos */
iconst_1
isub
goto 30
StackMap locals:
StackMap stack:
29: iload 8 /* pos */
StackMap locals:
StackMap stack: int
30: istore 10 /* zeroes */
start local 10 // int zeroes
31: .line 111
aload 2 /* wnaf */
iload 7 /* length */
iinc 7 /* length */ 1
iload 9 /* digit */
bipush 16
ishl
iload 10 /* zeroes */
ior
iastore
32: .line 112
iload 0 /* width */
istore 8 /* pos */
end local 10 // int zeroes
end local 9 // int digit
33: .line 88
StackMap locals:
StackMap stack:
iload 8 /* pos */
aload 1 /* k */
invokevirtual java.math.BigInteger.bitLength:()I
if_icmple 16
34: .line 116
aload 2 /* wnaf */
arraylength
iload 7 /* length */
if_icmple 36
35: .line 118
aload 2 /* wnaf */
iload 7 /* length */
invokestatic org.bouncycastle.math.ec.WNafUtil.trim:([II)[I
astore 2 /* wnaf */
36: .line 121
StackMap locals:
StackMap stack:
aload 2 /* wnaf */
areturn
end local 8 // int pos
end local 7 // int length
end local 6 // boolean carry
end local 5 // int sign
end local 4 // int mask
end local 3 // int pow2
end local 2 // int[] wnaf
end local 1 // java.math.BigInteger k
end local 0 // int width
LocalVariableTable:
Start End Slot Name Signature
0 37 0 width I
0 37 1 k Ljava/math/BigInteger;
9 37 2 wnaf [I
10 37 3 pow2 I
11 37 4 mask I
12 37 5 sign I
13 37 6 carry Z
14 37 7 length I
15 37 8 pos I
21 33 9 digit I
31 33 10 zeroes I
MethodParameters:
Name Flags
width
k
public static byte[] generateJSF(java.math.BigInteger, java.math.BigInteger);
descriptor: (Ljava/math/BigInteger;Ljava/math/BigInteger;)[B
flags: (0x0009) ACC_PUBLIC, ACC_STATIC
Code:
stack=5, locals=14, args_size=2
start local 0 // java.math.BigInteger g
start local 1 // java.math.BigInteger h
0: .line 126
aload 0 /* g */
invokevirtual java.math.BigInteger.bitLength:()I
aload 1 /* h */
invokevirtual java.math.BigInteger.bitLength:()I
invokestatic java.lang.Math.max:(II)I
iconst_1
iadd
istore 2 /* digits */
start local 2 // int digits
1: .line 127
iload 2 /* digits */
newarray 8
astore 3 /* jsf */
start local 3 // byte[] jsf
2: .line 129
aload 0 /* g */
astore 4 /* k0 */
start local 4 // java.math.BigInteger k0
3: aload 1 /* h */
astore 5 /* k1 */
start local 5 // java.math.BigInteger k1
4: .line 130
iconst_0
istore 6 /* j */
start local 6 // int j
5: iconst_0
istore 7 /* d0 */
start local 7 // int d0
6: iconst_0
istore 8 /* d1 */
start local 8 // int d1
7: .line 132
iconst_0
istore 9 /* offset */
start local 9 // int offset
8: .line 133
goto 30
9: .line 135
StackMap locals: java.math.BigInteger java.math.BigInteger int byte[] java.math.BigInteger java.math.BigInteger int int int int
StackMap stack:
aload 4 /* k0 */
invokevirtual java.math.BigInteger.intValue:()I
iload 9 /* offset */
iushr
iload 7 /* d0 */
iadd
bipush 7
iand
istore 10 /* n0 */
start local 10 // int n0
10: aload 5 /* k1 */
invokevirtual java.math.BigInteger.intValue:()I
iload 9 /* offset */
iushr
iload 8 /* d1 */
iadd
bipush 7
iand
istore 11 /* n1 */
start local 11 // int n1
11: .line 137
iload 10 /* n0 */
iconst_1
iand
istore 12 /* u0 */
start local 12 // int u0
12: .line 138
iload 12 /* u0 */
ifeq 16
13: .line 140
iload 12 /* u0 */
iload 10 /* n0 */
iconst_2
iand
isub
istore 12 /* u0 */
14: .line 141
iload 10 /* n0 */
iload 12 /* u0 */
iadd
iconst_4
if_icmpne 16
iload 11 /* n1 */
iconst_3
iand
iconst_2
if_icmpne 16
15: .line 143
iload 12 /* u0 */
ineg
istore 12 /* u0 */
16: .line 147
StackMap locals: int int int
StackMap stack:
iload 11 /* n1 */
iconst_1
iand
istore 13 /* u1 */
start local 13 // int u1
17: .line 148
iload 13 /* u1 */
ifeq 21
18: .line 150
iload 13 /* u1 */
iload 11 /* n1 */
iconst_2
iand
isub
istore 13 /* u1 */
19: .line 151
iload 11 /* n1 */
iload 13 /* u1 */
iadd
iconst_4
if_icmpne 21
iload 10 /* n0 */
iconst_3
iand
iconst_2
if_icmpne 21
20: .line 153
iload 13 /* u1 */
ineg
istore 13 /* u1 */
21: .line 157
StackMap locals: int
StackMap stack:
iload 7 /* d0 */
iconst_1
ishl
iconst_1
iload 12 /* u0 */
iadd
if_icmpne 23
22: .line 159
iload 7 /* d0 */
iconst_1
ixor
istore 7 /* d0 */
23: .line 161
StackMap locals:
StackMap stack:
iload 8 /* d1 */
iconst_1
ishl
iconst_1
iload 13 /* u1 */
iadd
if_icmpne 25
24: .line 163
iload 8 /* d1 */
iconst_1
ixor
istore 8 /* d1 */
25: .line 166
StackMap locals:
StackMap stack:
iinc 9 /* offset */ 1
iload 9 /* offset */
bipush 30
if_icmpne 29
26: .line 168
iconst_0
istore 9 /* offset */
27: .line 169
aload 4 /* k0 */
bipush 30
invokevirtual java.math.BigInteger.shiftRight:(I)Ljava/math/BigInteger;
astore 4 /* k0 */
28: .line 170
aload 5 /* k1 */
bipush 30
invokevirtual java.math.BigInteger.shiftRight:(I)Ljava/math/BigInteger;
astore 5 /* k1 */
29: .line 173
StackMap locals:
StackMap stack:
aload 3 /* jsf */
iload 6 /* j */
iinc 6 /* j */ 1
iload 12 /* u0 */
iconst_4
ishl
iload 13 /* u1 */
bipush 15
iand
ior
i2b
bastore
end local 13 // int u1
end local 12 // int u0
end local 11 // int n1
end local 10 // int n0
30: .line 133
StackMap locals: java.math.BigInteger java.math.BigInteger int byte[] java.math.BigInteger java.math.BigInteger int int int int
StackMap stack:
iload 7 /* d0 */
iload 8 /* d1 */
ior
ifne 9
aload 4 /* k0 */
invokevirtual java.math.BigInteger.bitLength:()I
iload 9 /* offset */
if_icmpgt 9
aload 5 /* k1 */
invokevirtual java.math.BigInteger.bitLength:()I
iload 9 /* offset */
if_icmpgt 9
31: .line 177
aload 3 /* jsf */
arraylength
iload 6 /* j */
if_icmple 33
32: .line 179
aload 3 /* jsf */
iload 6 /* j */
invokestatic org.bouncycastle.math.ec.WNafUtil.trim:([BI)[B
astore 3 /* jsf */
33: .line 182
StackMap locals:
StackMap stack:
aload 3 /* jsf */
areturn
end local 9 // int offset
end local 8 // int d1
end local 7 // int d0
end local 6 // int j
end local 5 // java.math.BigInteger k1
end local 4 // java.math.BigInteger k0
end local 3 // byte[] jsf
end local 2 // int digits
end local 1 // java.math.BigInteger h
end local 0 // java.math.BigInteger g
LocalVariableTable:
Start End Slot Name Signature
0 34 0 g Ljava/math/BigInteger;
0 34 1 h Ljava/math/BigInteger;
1 34 2 digits I
2 34 3 jsf [B
3 34 4 k0 Ljava/math/BigInteger;
4 34 5 k1 Ljava/math/BigInteger;
5 34 6 j I
6 34 7 d0 I
7 34 8 d1 I
8 34 9 offset I
10 30 10 n0 I
11 30 11 n1 I
12 30 12 u0 I
17 30 13 u1 I
MethodParameters:
Name Flags
g
h
public static byte[] generateNaf(java.math.BigInteger);
descriptor: (Ljava/math/BigInteger;)[B
flags: (0x0009) ACC_PUBLIC, ACC_STATIC
Code:
stack=4, locals=6, args_size=1
start local 0 // java.math.BigInteger k
0: .line 187
aload 0 /* k */
invokevirtual java.math.BigInteger.signum:()I
ifne 2
1: .line 189
getstatic org.bouncycastle.math.ec.WNafUtil.EMPTY_BYTES:[B
areturn
2: .line 192
StackMap locals:
StackMap stack:
aload 0 /* k */
iconst_1
invokevirtual java.math.BigInteger.shiftLeft:(I)Ljava/math/BigInteger;
aload 0 /* k */
invokevirtual java.math.BigInteger.add:(Ljava/math/BigInteger;)Ljava/math/BigInteger;
astore 1 /* _3k */
start local 1 // java.math.BigInteger _3k
3: .line 194
aload 1 /* _3k */
invokevirtual java.math.BigInteger.bitLength:()I
iconst_1
isub
istore 2 /* digits */
start local 2 // int digits
4: .line 195
iload 2 /* digits */
newarray 8
astore 3 /* naf */
start local 3 // byte[] naf
5: .line 197
aload 1 /* _3k */
aload 0 /* k */
invokevirtual java.math.BigInteger.xor:(Ljava/math/BigInteger;)Ljava/math/BigInteger;
astore 4 /* diff */
start local 4 // java.math.BigInteger diff
6: .line 199
iconst_1
istore 5 /* i */
start local 5 // int i
7: goto 14
8: .line 201
StackMap locals: java.math.BigInteger java.math.BigInteger int byte[] java.math.BigInteger int
StackMap stack:
aload 4 /* diff */
iload 5 /* i */
invokevirtual java.math.BigInteger.testBit:(I)Z
ifeq 13
9: .line 203
aload 3 /* naf */
iload 5 /* i */
iconst_1
isub
aload 0 /* k */
iload 5 /* i */
invokevirtual java.math.BigInteger.testBit:(I)Z
ifeq 10
iconst_m1
goto 11
StackMap locals: java.math.BigInteger java.math.BigInteger int byte[] java.math.BigInteger int
StackMap stack: byte[] int
10: iconst_1
StackMap locals: java.math.BigInteger java.math.BigInteger int byte[] java.math.BigInteger int
StackMap stack: byte[] int int
11: i2b
bastore
12: .line 204
iinc 5 /* i */ 1
13: .line 199
StackMap locals:
StackMap stack:
iinc 5 /* i */ 1
StackMap locals:
StackMap stack:
14: iload 5 /* i */
iload 2 /* digits */
if_icmplt 8
end local 5 // int i
15: .line 208
aload 3 /* naf */
iload 2 /* digits */
iconst_1
isub
iconst_1
bastore
16: .line 210
aload 3 /* naf */
areturn
end local 4 // java.math.BigInteger diff
end local 3 // byte[] naf
end local 2 // int digits
end local 1 // java.math.BigInteger _3k
end local 0 // java.math.BigInteger k
LocalVariableTable:
Start End Slot Name Signature
0 17 0 k Ljava/math/BigInteger;
3 17 1 _3k Ljava/math/BigInteger;
4 17 2 digits I
5 17 3 naf [B
6 17 4 diff Ljava/math/BigInteger;
7 15 5 i I
MethodParameters:
Name Flags
k
public static byte[] generateWindowNaf(int, java.math.BigInteger);
descriptor: (ILjava/math/BigInteger;)[B
flags: (0x0009) ACC_PUBLIC, ACC_STATIC
Code:
stack=3, locals=10, args_size=2
start local 0 // int width
start local 1 // java.math.BigInteger k
0: .line 227
iload 0 /* width */
iconst_2
if_icmpne 2
1: .line 229
aload 1 /* k */
invokestatic org.bouncycastle.math.ec.WNafUtil.generateNaf:(Ljava/math/BigInteger;)[B
areturn
2: .line 232
StackMap locals:
StackMap stack:
iload 0 /* width */
iconst_2
if_icmplt 3
iload 0 /* width */
bipush 8
if_icmple 4
3: .line 234
StackMap locals:
StackMap stack:
new java.lang.IllegalArgumentException
dup
ldc "'width' must be in the range [2, 8]"
invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
athrow
4: .line 236
StackMap locals:
StackMap stack:
aload 1 /* k */
invokevirtual java.math.BigInteger.signum:()I
ifne 6
5: .line 238
getstatic org.bouncycastle.math.ec.WNafUtil.EMPTY_BYTES:[B
areturn
6: .line 241
StackMap locals:
StackMap stack:
aload 1 /* k */
invokevirtual java.math.BigInteger.bitLength:()I
iconst_1
iadd
newarray 8
astore 2 /* wnaf */
start local 2 // byte[] wnaf
7: .line 244
iconst_1
iload 0 /* width */
ishl
istore 3 /* pow2 */
start local 3 // int pow2
8: .line 245
iload 3 /* pow2 */
iconst_1
isub
istore 4 /* mask */
start local 4 // int mask
9: .line 246
iload 3 /* pow2 */
iconst_1
iushr
istore 5 /* sign */
start local 5 // int sign
10: .line 248
iconst_0
istore 6 /* carry */
start local 6 // boolean carry
11: .line 249
iconst_0
istore 7 /* length */
start local 7 // int length
12: iconst_0
istore 8 /* pos */
start local 8 // int pos
13: .line 251
goto 31
14: .line 253
StackMap locals: int java.math.BigInteger byte[] int int int int int int
StackMap stack:
aload 1 /* k */
iload 8 /* pos */
invokevirtual java.math.BigInteger.testBit:(I)Z
iload 6 /* carry */
if_icmpne 17
15: .line 255
iinc 8 /* pos */ 1
16: .line 256
goto 31
17: .line 259
StackMap locals:
StackMap stack:
aload 1 /* k */
iload 8 /* pos */
invokevirtual java.math.BigInteger.shiftRight:(I)Ljava/math/BigInteger;
astore 1 /* k */
18: .line 261
aload 1 /* k */
invokevirtual java.math.BigInteger.intValue:()I
iload 4 /* mask */
iand
istore 9 /* digit */
start local 9 // int digit
19: .line 262
iload 6 /* carry */
ifeq 21
20: .line 264
iinc 9 /* digit */ 1
21: .line 267
StackMap locals: int
StackMap stack:
iload 9 /* digit */
iload 5 /* sign */
iand
ifeq 22
iconst_1
goto 23
StackMap locals:
StackMap stack:
22: iconst_0
StackMap locals:
StackMap stack: int
23: istore 6 /* carry */
24: .line 268
iload 6 /* carry */
ifeq 26
25: .line 270
iload 9 /* digit */
iload 3 /* pow2 */
isub
istore 9 /* digit */
26: .line 273
StackMap locals:
StackMap stack:
iload 7 /* length */
iload 7 /* length */
ifle 27
iload 8 /* pos */
iconst_1
isub
goto 28
StackMap locals:
StackMap stack: int
27: iload 8 /* pos */
StackMap locals: int java.math.BigInteger byte[] int int int int int int int
StackMap stack: int int
28: iadd
istore 7 /* length */
29: .line 274
aload 2 /* wnaf */
iload 7 /* length */
iinc 7 /* length */ 1
iload 9 /* digit */
i2b
bastore
30: .line 275
iload 0 /* width */
istore 8 /* pos */
end local 9 // int digit
31: .line 251
StackMap locals:
StackMap stack:
iload 8 /* pos */
aload 1 /* k */
invokevirtual java.math.BigInteger.bitLength:()I
if_icmple 14
32: .line 279
aload 2 /* wnaf */
arraylength
iload 7 /* length */
if_icmple 34
33: .line 281
aload 2 /* wnaf */
iload 7 /* length */
invokestatic org.bouncycastle.math.ec.WNafUtil.trim:([BI)[B
astore 2 /* wnaf */
34: .line 284
StackMap locals:
StackMap stack:
aload 2 /* wnaf */
areturn
end local 8 // int pos
end local 7 // int length
end local 6 // boolean carry
end local 5 // int sign
end local 4 // int mask
end local 3 // int pow2
end local 2 // byte[] wnaf
end local 1 // java.math.BigInteger k
end local 0 // int width
LocalVariableTable:
Start End Slot Name Signature
0 35 0 width I
0 35 1 k Ljava/math/BigInteger;
7 35 2 wnaf [B
8 35 3 pow2 I
9 35 4 mask I
10 35 5 sign I
11 35 6 carry Z
12 35 7 length I
13 35 8 pos I
19 31 9 digit I
MethodParameters:
Name Flags
width
k
public static int getNafWeight(java.math.BigInteger);
descriptor: (Ljava/math/BigInteger;)I
flags: (0x0009) ACC_PUBLIC, ACC_STATIC
Code:
stack=2, locals=3, args_size=1
start local 0 // java.math.BigInteger k
0: .line 289
aload 0 /* k */
invokevirtual java.math.BigInteger.signum:()I
ifne 2
1: .line 291
iconst_0
ireturn
2: .line 294
StackMap locals:
StackMap stack:
aload 0 /* k */
iconst_1
invokevirtual java.math.BigInteger.shiftLeft:(I)Ljava/math/BigInteger;
aload 0 /* k */
invokevirtual java.math.BigInteger.add:(Ljava/math/BigInteger;)Ljava/math/BigInteger;
astore 1 /* _3k */
start local 1 // java.math.BigInteger _3k
3: .line 295
aload 1 /* _3k */
aload 0 /* k */
invokevirtual java.math.BigInteger.xor:(Ljava/math/BigInteger;)Ljava/math/BigInteger;
astore 2 /* diff */
start local 2 // java.math.BigInteger diff
4: .line 297
aload 2 /* diff */
invokevirtual java.math.BigInteger.bitCount:()I
ireturn
end local 2 // java.math.BigInteger diff
end local 1 // java.math.BigInteger _3k
end local 0 // java.math.BigInteger k
LocalVariableTable:
Start End Slot Name Signature
0 5 0 k Ljava/math/BigInteger;
3 5 1 _3k Ljava/math/BigInteger;
4 5 2 diff Ljava/math/BigInteger;
MethodParameters:
Name Flags
k
public static org.bouncycastle.math.ec.WNafPreCompInfo getWNafPreCompInfo(org.bouncycastle.math.ec.ECPoint);
descriptor: (Lorg/bouncycastle/math/ec/ECPoint;)Lorg/bouncycastle/math/ec/WNafPreCompInfo;
flags: (0x0009) ACC_PUBLIC, ACC_STATIC
Code:
stack=3, locals=1, args_size=1
start local 0 // org.bouncycastle.math.ec.ECPoint p
0: .line 302
aload 0 /* p */
invokevirtual org.bouncycastle.math.ec.ECPoint.getCurve:()Lorg/bouncycastle/math/ec/ECCurve;
aload 0 /* p */
ldc "bc_wnaf"
invokevirtual org.bouncycastle.math.ec.ECCurve.getPreCompInfo:(Lorg/bouncycastle/math/ec/ECPoint;Ljava/lang/String;)Lorg/bouncycastle/math/ec/PreCompInfo;
invokestatic org.bouncycastle.math.ec.WNafUtil.getWNafPreCompInfo:(Lorg/bouncycastle/math/ec/PreCompInfo;)Lorg/bouncycastle/math/ec/WNafPreCompInfo;
areturn
end local 0 // org.bouncycastle.math.ec.ECPoint p
LocalVariableTable:
Start End Slot Name Signature
0 1 0 p Lorg/bouncycastle/math/ec/ECPoint;
MethodParameters:
Name Flags
p
public static org.bouncycastle.math.ec.WNafPreCompInfo getWNafPreCompInfo(org.bouncycastle.math.ec.PreCompInfo);
descriptor: (Lorg/bouncycastle/math/ec/PreCompInfo;)Lorg/bouncycastle/math/ec/WNafPreCompInfo;
flags: (0x0009) ACC_PUBLIC, ACC_STATIC
Code:
stack=1, locals=1, args_size=1
start local 0 // org.bouncycastle.math.ec.PreCompInfo preCompInfo
0: .line 307
aload 0 /* preCompInfo */
instanceof org.bouncycastle.math.ec.WNafPreCompInfo
ifeq 1
aload 0 /* preCompInfo */
checkcast org.bouncycastle.math.ec.WNafPreCompInfo
goto 2
StackMap locals:
StackMap stack:
1: aconst_null
StackMap locals:
StackMap stack: org.bouncycastle.math.ec.WNafPreCompInfo
2: areturn
end local 0 // org.bouncycastle.math.ec.PreCompInfo preCompInfo
LocalVariableTable:
Start End Slot Name Signature
0 3 0 preCompInfo Lorg/bouncycastle/math/ec/PreCompInfo;
MethodParameters:
Name Flags
preCompInfo
public static int getWindowSize(int);
descriptor: (I)I
flags: (0x0009) ACC_PUBLIC, ACC_STATIC
Code:
stack=2, locals=1, args_size=1
start local 0 // int bits
0: .line 318
iload 0 /* bits */
getstatic org.bouncycastle.math.ec.WNafUtil.DEFAULT_WINDOW_SIZE_CUTOFFS:[I
invokestatic org.bouncycastle.math.ec.WNafUtil.getWindowSize:(I[I)I
ireturn
end local 0 // int bits
LocalVariableTable:
Start End Slot Name Signature
0 1 0 bits I
MethodParameters:
Name Flags
bits
public static int getWindowSize(int, int[]);
descriptor: (I[I)I
flags: (0x0009) ACC_PUBLIC, ACC_STATIC
Code:
stack=3, locals=3, args_size=2
start local 0 // int bits
start local 1 // int[] windowSizeCutoffs
0: .line 330
iconst_0
istore 2 /* w */
start local 2 // int w
1: .line 331
goto 5
2: .line 333
StackMap locals: int
StackMap stack:
iload 0 /* bits */
aload 1 /* windowSizeCutoffs */
iload 2 /* w */
iaload
if_icmpge 4
3: .line 335
goto 6
4: .line 331
StackMap locals:
StackMap stack:
iinc 2 /* w */ 1
StackMap locals:
StackMap stack:
5: iload 2 /* w */
aload 1 /* windowSizeCutoffs */
arraylength
if_icmplt 2
6: .line 338
StackMap locals:
StackMap stack:
iload 2 /* w */
iconst_2
iadd
ireturn
end local 2 // int w
end local 1 // int[] windowSizeCutoffs
end local 0 // int bits
LocalVariableTable:
Start End Slot Name Signature
0 7 0 bits I
0 7 1 windowSizeCutoffs [I
1 7 2 w I
MethodParameters:
Name Flags
bits
windowSizeCutoffs
public static org.bouncycastle.math.ec.ECPoint mapPointWithPrecomp(org.bouncycastle.math.ec.ECPoint, int, boolean, org.bouncycastle.math.ec.ECPointMap);
descriptor: (Lorg/bouncycastle/math/ec/ECPoint;IZLorg/bouncycastle/math/ec/ECPointMap;)Lorg/bouncycastle/math/ec/ECPoint;
flags: (0x0009) ACC_PUBLIC, ACC_STATIC
Code:
stack=8, locals=7, args_size=4
start local 0 // org.bouncycastle.math.ec.ECPoint p
start local 1 // int width
start local 2 // boolean includeNegated
start local 3 // org.bouncycastle.math.ec.ECPointMap pointMap
0: .line 344
aload 0 /* p */
invokevirtual org.bouncycastle.math.ec.ECPoint.getCurve:()Lorg/bouncycastle/math/ec/ECCurve;
astore 4 /* c */
start local 4 // org.bouncycastle.math.ec.ECCurve c
1: .line 345
aload 0 /* p */
iload 1 /* width */
iload 2 /* includeNegated */
invokestatic org.bouncycastle.math.ec.WNafUtil.precompute:(Lorg/bouncycastle/math/ec/ECPoint;IZ)Lorg/bouncycastle/math/ec/WNafPreCompInfo;
astore 5 /* wnafPreCompP */
start local 5 // org.bouncycastle.math.ec.WNafPreCompInfo wnafPreCompP
2: .line 347
aload 3 /* pointMap */
aload 0 /* p */
invokeinterface org.bouncycastle.math.ec.ECPointMap.map:(Lorg/bouncycastle/math/ec/ECPoint;)Lorg/bouncycastle/math/ec/ECPoint;
astore 6 /* q */
start local 6 // org.bouncycastle.math.ec.ECPoint q
3: .line 348
aload 4 /* c */
aload 6 /* q */
ldc "bc_wnaf"
new org.bouncycastle.math.ec.WNafUtil$1
dup
aload 5 /* wnafPreCompP */
aload 3 /* pointMap */
iload 2 /* includeNegated */
invokespecial org.bouncycastle.math.ec.WNafUtil$1.<init>:(Lorg/bouncycastle/math/ec/WNafPreCompInfo;Lorg/bouncycastle/math/ec/ECPointMap;Z)V
invokevirtual org.bouncycastle.math.ec.ECCurve.precompute:(Lorg/bouncycastle/math/ec/ECPoint;Ljava/lang/String;Lorg/bouncycastle/math/ec/PreCompCallback;)Lorg/bouncycastle/math/ec/PreCompInfo;
pop
4: .line 383
aload 6 /* q */
areturn
end local 6 // org.bouncycastle.math.ec.ECPoint q
end local 5 // org.bouncycastle.math.ec.WNafPreCompInfo wnafPreCompP
end local 4 // org.bouncycastle.math.ec.ECCurve c
end local 3 // org.bouncycastle.math.ec.ECPointMap pointMap
end local 2 // boolean includeNegated
end local 1 // int width
end local 0 // org.bouncycastle.math.ec.ECPoint p
LocalVariableTable:
Start End Slot Name Signature
0 5 0 p Lorg/bouncycastle/math/ec/ECPoint;
0 5 1 width I
0 5 2 includeNegated Z
0 5 3 pointMap Lorg/bouncycastle/math/ec/ECPointMap;
1 5 4 c Lorg/bouncycastle/math/ec/ECCurve;
2 5 5 wnafPreCompP Lorg/bouncycastle/math/ec/WNafPreCompInfo;
3 5 6 q Lorg/bouncycastle/math/ec/ECPoint;
MethodParameters:
Name Flags
p
width final
includeNegated final
pointMap final
public static org.bouncycastle.math.ec.WNafPreCompInfo precompute(org.bouncycastle.math.ec.ECPoint, int, boolean);
descriptor: (Lorg/bouncycastle/math/ec/ECPoint;IZ)Lorg/bouncycastle/math/ec/WNafPreCompInfo;
flags: (0x0009) ACC_PUBLIC, ACC_STATIC
Code:
stack=9, locals=4, args_size=3
start local 0 // org.bouncycastle.math.ec.ECPoint p
start local 1 // int width
start local 2 // boolean includeNegated
0: .line 388
aload 0 /* p */
invokevirtual org.bouncycastle.math.ec.ECPoint.getCurve:()Lorg/bouncycastle/math/ec/ECCurve;
astore 3 /* c */
start local 3 // org.bouncycastle.math.ec.ECCurve c
1: .line 390
aload 3 /* c */
aload 0 /* p */
ldc "bc_wnaf"
new org.bouncycastle.math.ec.WNafUtil$2
dup
iload 1 /* width */
iload 2 /* includeNegated */
aload 0 /* p */
aload 3 /* c */
invokespecial org.bouncycastle.math.ec.WNafUtil$2.<init>:(IZLorg/bouncycastle/math/ec/ECPoint;Lorg/bouncycastle/math/ec/ECCurve;)V
invokevirtual org.bouncycastle.math.ec.ECCurve.precompute:(Lorg/bouncycastle/math/ec/ECPoint;Ljava/lang/String;Lorg/bouncycastle/math/ec/PreCompCallback;)Lorg/bouncycastle/math/ec/PreCompInfo;
checkcast org.bouncycastle.math.ec.WNafPreCompInfo
areturn
end local 3 // org.bouncycastle.math.ec.ECCurve c
end local 2 // boolean includeNegated
end local 1 // int width
end local 0 // org.bouncycastle.math.ec.ECPoint p
LocalVariableTable:
Start End Slot Name Signature
0 2 0 p Lorg/bouncycastle/math/ec/ECPoint;
0 2 1 width I
0 2 2 includeNegated Z
1 2 3 c Lorg/bouncycastle/math/ec/ECCurve;
MethodParameters:
Name Flags
p final
width final
includeNegated final
private static byte[] trim(byte[], int);
descriptor: ([BI)[B
flags: (0x000a) ACC_PRIVATE, ACC_STATIC
Code:
stack=5, locals=3, args_size=2
start local 0 // byte[] a
start local 1 // int length
0: .line 553
iload 1 /* length */
newarray 8
astore 2 /* result */
start local 2 // byte[] result
1: .line 554
aload 0 /* a */
iconst_0
aload 2 /* result */
iconst_0
aload 2 /* result */
arraylength
invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
2: .line 555
aload 2 /* result */
areturn
end local 2 // byte[] result
end local 1 // int length
end local 0 // byte[] a
LocalVariableTable:
Start End Slot Name Signature
0 3 0 a [B
0 3 1 length I
1 3 2 result [B
MethodParameters:
Name Flags
a
length
private static int[] trim(int[], int);
descriptor: ([II)[I
flags: (0x000a) ACC_PRIVATE, ACC_STATIC
Code:
stack=5, locals=3, args_size=2
start local 0 // int[] a
start local 1 // int length
0: .line 560
iload 1 /* length */
newarray 10
astore 2 /* result */
start local 2 // int[] result
1: .line 561
aload 0 /* a */
iconst_0
aload 2 /* result */
iconst_0
aload 2 /* result */
arraylength
invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
2: .line 562
aload 2 /* result */
areturn
end local 2 // int[] result
end local 1 // int length
end local 0 // int[] a
LocalVariableTable:
Start End Slot Name Signature
0 3 0 a [I
0 3 1 length I
1 3 2 result [I
MethodParameters:
Name Flags
a
length
private static org.bouncycastle.math.ec.ECPoint[] resizeTable(org.bouncycastle.math.ec.ECPoint[], int);
descriptor: ([Lorg/bouncycastle/math/ec/ECPoint;I)[Lorg/bouncycastle/math/ec/ECPoint;
flags: (0x000a) ACC_PRIVATE, ACC_STATIC
Code:
stack=5, locals=3, args_size=2
start local 0 // org.bouncycastle.math.ec.ECPoint[] a
start local 1 // int length
0: .line 567
iload 1 /* length */
anewarray org.bouncycastle.math.ec.ECPoint
astore 2 /* result */
start local 2 // org.bouncycastle.math.ec.ECPoint[] result
1: .line 568
aload 0 /* a */
iconst_0
aload 2 /* result */
iconst_0
aload 0 /* a */
arraylength
invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
2: .line 569
aload 2 /* result */
areturn
end local 2 // org.bouncycastle.math.ec.ECPoint[] result
end local 1 // int length
end local 0 // org.bouncycastle.math.ec.ECPoint[] a
LocalVariableTable:
Start End Slot Name Signature
0 3 0 a [Lorg/bouncycastle/math/ec/ECPoint;
0 3 1 length I
1 3 2 result [Lorg/bouncycastle/math/ec/ECPoint;
MethodParameters:
Name Flags
a
length
}
SourceFile: "WNafUtil.java"
NestMembers:
org.bouncycastle.math.ec.WNafUtil$1 org.bouncycastle.math.ec.WNafUtil$2
InnerClasses:
org.bouncycastle.math.ec.WNafUtil$1
org.bouncycastle.math.ec.WNafUtil$2