blamka_generic.go

Documentation: golang.org/x/crypto/argon2

     1  // Copyright 2017 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package argon2
     6  
     7  var useSSE4 bool
     8  
     9  func processBlockGeneric(out, in1, in2 *block, xor bool) {
    10  	var t block
    11  	for i := range t {
    12  		t[i] = in1[i] ^ in2[i]
    13  	}
    14  	for i := 0; i < blockLength; i += 16 {
    15  		blamkaGeneric(
    16  			&t[i+0], &t[i+1], &t[i+2], &t[i+3],
    17  			&t[i+4], &t[i+5], &t[i+6], &t[i+7],
    18  			&t[i+8], &t[i+9], &t[i+10], &t[i+11],
    19  			&t[i+12], &t[i+13], &t[i+14], &t[i+15],
    20  		)
    21  	}
    22  	for i := 0; i < blockLength/8; i += 2 {
    23  		blamkaGeneric(
    24  			&t[i], &t[i+1], &t[16+i], &t[16+i+1],
    25  			&t[32+i], &t[32+i+1], &t[48+i], &t[48+i+1],
    26  			&t[64+i], &t[64+i+1], &t[80+i], &t[80+i+1],
    27  			&t[96+i], &t[96+i+1], &t[112+i], &t[112+i+1],
    28  		)
    29  	}
    30  	if xor {
    31  		for i := range t {
    32  			out[i] ^= in1[i] ^ in2[i] ^ t[i]
    33  		}
    34  	} else {
    35  		for i := range t {
    36  			out[i] = in1[i] ^ in2[i] ^ t[i]
    37  		}
    38  	}
    39  }
    40  
    41  func blamkaGeneric(t00, t01, t02, t03, t04, t05, t06, t07, t08, t09, t10, t11, t12, t13, t14, t15 *uint64) {
    42  	v00, v01, v02, v03 := *t00, *t01, *t02, *t03
    43  	v04, v05, v06, v07 := *t04, *t05, *t06, *t07
    44  	v08, v09, v10, v11 := *t08, *t09, *t10, *t11
    45  	v12, v13, v14, v15 := *t12, *t13, *t14, *t15
    46  
    47  	v00 += v04 + 2*uint64(uint32(v00))*uint64(uint32(v04))
    48  	v12 ^= v00
    49  	v12 = v12>>32 | v12<<32
    50  	v08 += v12 + 2*uint64(uint32(v08))*uint64(uint32(v12))
    51  	v04 ^= v08
    52  	v04 = v04>>24 | v04<<40
    53  
    54  	v00 += v04 + 2*uint64(uint32(v00))*uint64(uint32(v04))
    55  	v12 ^= v00
    56  	v12 = v12>>16 | v12<<48
    57  	v08 += v12 + 2*uint64(uint32(v08))*uint64(uint32(v12))
    58  	v04 ^= v08
    59  	v04 = v04>>63 | v04<<1
    60  
    61  	v01 += v05 + 2*uint64(uint32(v01))*uint64(uint32(v05))
    62  	v13 ^= v01
    63  	v13 = v13>>32 | v13<<32
    64  	v09 += v13 + 2*uint64(uint32(v09))*uint64(uint32(v13))
    65  	v05 ^= v09
    66  	v05 = v05>>24 | v05<<40
    67  
    68  	v01 += v05 + 2*uint64(uint32(v01))*uint64(uint32(v05))
    69  	v13 ^= v01
    70  	v13 = v13>>16 | v13<<48
    71  	v09 += v13 + 2*uint64(uint32(v09))*uint64(uint32(v13))
    72  	v05 ^= v09
    73  	v05 = v05>>63 | v05<<1
    74  
    75  	v02 += v06 + 2*uint64(uint32(v02))*uint64(uint32(v06))
    76  	v14 ^= v02
    77  	v14 = v14>>32 | v14<<32
    78  	v10 += v14 + 2*uint64(uint32(v10))*uint64(uint32(v14))
    79  	v06 ^= v10
    80  	v06 = v06>>24 | v06<<40
    81  
    82  	v02 += v06 + 2*uint64(uint32(v02))*uint64(uint32(v06))
    83  	v14 ^= v02
    84  	v14 = v14>>16 | v14<<48
    85  	v10 += v14 + 2*uint64(uint32(v10))*uint64(uint32(v14))
    86  	v06 ^= v10
    87  	v06 = v06>>63 | v06<<1
    88  
    89  	v03 += v07 + 2*uint64(uint32(v03))*uint64(uint32(v07))
    90  	v15 ^= v03
    91  	v15 = v15>>32 | v15<<32
    92  	v11 += v15 + 2*uint64(uint32(v11))*uint64(uint32(v15))
    93  	v07 ^= v11
    94  	v07 = v07>>24 | v07<<40
    95  
    96  	v03 += v07 + 2*uint64(uint32(v03))*uint64(uint32(v07))
    97  	v15 ^= v03
    98  	v15 = v15>>16 | v15<<48
    99  	v11 += v15 + 2*uint64(uint32(v11))*uint64(uint32(v15))
   100  	v07 ^= v11
   101  	v07 = v07>>63 | v07<<1
   102  
   103  	v00 += v05 + 2*uint64(uint32(v00))*uint64(uint32(v05))
   104  	v15 ^= v00
   105  	v15 = v15>>32 | v15<<32
   106  	v10 += v15 + 2*uint64(uint32(v10))*uint64(uint32(v15))
   107  	v05 ^= v10
   108  	v05 = v05>>24 | v05<<40
   109  
   110  	v00 += v05 + 2*uint64(uint32(v00))*uint64(uint32(v05))
   111  	v15 ^= v00
   112  	v15 = v15>>16 | v15<<48
   113  	v10 += v15 + 2*uint64(uint32(v10))*uint64(uint32(v15))
   114  	v05 ^= v10
   115  	v05 = v05>>63 | v05<<1
   116  
   117  	v01 += v06 + 2*uint64(uint32(v01))*uint64(uint32(v06))
   118  	v12 ^= v01
   119  	v12 = v12>>32 | v12<<32
   120  	v11 += v12 + 2*uint64(uint32(v11))*uint64(uint32(v12))
   121  	v06 ^= v11
   122  	v06 = v06>>24 | v06<<40
   123  
   124  	v01 += v06 + 2*uint64(uint32(v01))*uint64(uint32(v06))
   125  	v12 ^= v01
   126  	v12 = v12>>16 | v12<<48
   127  	v11 += v12 + 2*uint64(uint32(v11))*uint64(uint32(v12))
   128  	v06 ^= v11
   129  	v06 = v06>>63 | v06<<1
   130  
   131  	v02 += v07 + 2*uint64(uint32(v02))*uint64(uint32(v07))
   132  	v13 ^= v02
   133  	v13 = v13>>32 | v13<<32
   134  	v08 += v13 + 2*uint64(uint32(v08))*uint64(uint32(v13))
   135  	v07 ^= v08
   136  	v07 = v07>>24 | v07<<40
   137  
   138  	v02 += v07 + 2*uint64(uint32(v02))*uint64(uint32(v07))
   139  	v13 ^= v02
   140  	v13 = v13>>16 | v13<<48
   141  	v08 += v13 + 2*uint64(uint32(v08))*uint64(uint32(v13))
   142  	v07 ^= v08
   143  	v07 = v07>>63 | v07<<1
   144  
   145  	v03 += v04 + 2*uint64(uint32(v03))*uint64(uint32(v04))
   146  	v14 ^= v03
   147  	v14 = v14>>32 | v14<<32
   148  	v09 += v14 + 2*uint64(uint32(v09))*uint64(uint32(v14))
   149  	v04 ^= v09
   150  	v04 = v04>>24 | v04<<40
   151  
   152  	v03 += v04 + 2*uint64(uint32(v03))*uint64(uint32(v04))
   153  	v14 ^= v03
   154  	v14 = v14>>16 | v14<<48
   155  	v09 += v14 + 2*uint64(uint32(v09))*uint64(uint32(v14))
   156  	v04 ^= v09
   157  	v04 = v04>>63 | v04<<1
   158  
   159  	*t00, *t01, *t02, *t03 = v00, v01, v02, v03
   160  	*t04, *t05, *t06, *t07 = v04, v05, v06, v07
   161  	*t08, *t09, *t10, *t11 = v08, v09, v10, v11
   162  	*t12, *t13, *t14, *t15 = v12, v13, v14, v15
   163  }
   164
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