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
  5package argon2
  6
  7var useSSE4 bool
  8
  9func 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
 41func 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}