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git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/blake2/blake2b.c
621949013a6ee6be0730b86dcb3b237528f92f58
2 * Copyright 2012, Samuel Neves <sneves@dei.uc.pt>.
3 * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
5 * Licensed under the OpenSSL licenses, (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 * https://www.openssl.org/source/license.html
9 * or in the file LICENSE in the source distribution.
13 * Derived from the BLAKE2 reference implementation written by Samuel Neves.
14 * More information about the BLAKE2 hash function and its implementations
15 * can be found at https://blake2.net.
19 #include <openssl/crypto.h>
22 #include "internal/blake2_locl.h"
23 #include "blake2_impl.h"
25 static const uint64_t blake2b_IV
[8] =
27 0x6a09e667f3bcc908U
, 0xbb67ae8584caa73bU
,
28 0x3c6ef372fe94f82bU
, 0xa54ff53a5f1d36f1U
,
29 0x510e527fade682d1U
, 0x9b05688c2b3e6c1fU
,
30 0x1f83d9abfb41bd6bU
, 0x5be0cd19137e2179U
33 static const uint8_t blake2b_sigma
[12][16] =
35 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 } ,
36 { 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 } ,
37 { 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4 } ,
38 { 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8 } ,
39 { 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13 } ,
40 { 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9 } ,
41 { 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11 } ,
42 { 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10 } ,
43 { 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5 } ,
44 { 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13 , 0 } ,
45 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 } ,
46 { 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 }
49 /* Set that it's the last block we'll compress */
50 static ossl_inline
void blake2b_set_lastblock(BLAKE2B_CTX
*S
)
55 /* Increment the data hashed counter. */
56 static ossl_inline
void blake2b_increment_counter(BLAKE2B_CTX
*S
,
60 S
->t
[1] += (S
->t
[0] < inc
);
63 /* Initialize the hashing state. */
64 static ossl_inline
void blake2b_init0(BLAKE2B_CTX
*S
)
68 memset(S
, 0, sizeof(BLAKE2B_CTX
));
69 for(i
= 0; i
< 8; ++i
) {
70 S
->h
[i
] = blake2b_IV
[i
];
74 /* init xors IV with input parameter block */
75 static void blake2b_init_param(BLAKE2B_CTX
*S
, const BLAKE2B_PARAM
*P
)
78 const uint8_t *p
= (const uint8_t *)(P
);
81 /* The param struct is carefully hand packed, and should be 64 bytes on
83 OPENSSL_assert(sizeof(BLAKE2B_PARAM
) == 64);
84 /* IV XOR ParamBlock */
85 for(i
= 0; i
< 8; ++i
) {
86 S
->h
[i
] ^= load64(p
+ sizeof(S
->h
[i
]) * i
);
90 /* Initialize the hashing context. Always returns 1. */
91 int BLAKE2b_Init(BLAKE2B_CTX
*c
)
94 P
->digest_length
= BLAKE2B_DIGEST_LENGTH
;
98 store32(P
->leaf_length
, 0);
99 store64(P
->node_offset
, 0);
102 memset(P
->reserved
, 0, sizeof(P
->reserved
));
103 memset(P
->salt
, 0, sizeof(P
->salt
));
104 memset(P
->personal
, 0, sizeof(P
->personal
));
105 blake2b_init_param(c
, P
);
109 /* Permute the state while xoring in the block of data. */
110 static void blake2b_compress(BLAKE2B_CTX
*S
,
111 const uint8_t block
[BLAKE2B_BLOCKBYTES
])
117 for(i
= 0; i
< 16; ++i
) {
118 m
[i
] = load64(block
+ i
* sizeof(m
[i
]));
121 for(i
= 0; i
< 8; ++i
) {
125 v
[8] = blake2b_IV
[0];
126 v
[9] = blake2b_IV
[1];
127 v
[10] = blake2b_IV
[2];
128 v
[11] = blake2b_IV
[3];
129 v
[12] = S
->t
[0] ^ blake2b_IV
[4];
130 v
[13] = S
->t
[1] ^ blake2b_IV
[5];
131 v
[14] = S
->f
[0] ^ blake2b_IV
[6];
132 v
[15] = S
->f
[1] ^ blake2b_IV
[7];
133 #define G(r,i,a,b,c,d) \
135 a = a + b + m[blake2b_sigma[r][2*i+0]]; \
136 d = rotr64(d ^ a, 32); \
138 b = rotr64(b ^ c, 24); \
139 a = a + b + m[blake2b_sigma[r][2*i+1]]; \
140 d = rotr64(d ^ a, 16); \
142 b = rotr64(b ^ c, 63); \
146 G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \
147 G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \
148 G(r,2,v[ 2],v[ 6],v[10],v[14]); \
149 G(r,3,v[ 3],v[ 7],v[11],v[15]); \
150 G(r,4,v[ 0],v[ 5],v[10],v[15]); \
151 G(r,5,v[ 1],v[ 6],v[11],v[12]); \
152 G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \
153 G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \
168 for(i
= 0; i
< 8; ++i
) {
169 S
->h
[i
] = S
->h
[i
] ^ v
[i
] ^ v
[i
+ 8];
176 /* Absorb the input data into the hash state. Always returns 1. */
177 int BLAKE2b_Update(BLAKE2B_CTX
*c
, const void *data
, size_t datalen
)
179 const uint8_t *in
= data
;
183 fill
= sizeof(c
->buf
) - c
->buflen
;
184 /* Must be >, not >=, so that last block can be hashed differently */
186 memcpy(c
->buf
+ c
->buflen
, in
, fill
); /* Fill buffer */
187 blake2b_increment_counter(c
, BLAKE2B_BLOCKBYTES
);
188 blake2b_compress(c
, c
->buf
); /* Compress */
192 } else { /* datalen <= fill */
193 memcpy(c
->buf
+ c
->buflen
, in
, datalen
);
194 c
->buflen
+= datalen
; /* Be lazy, do not compress */
203 * Calculate the final hash and save it in md.
206 int BLAKE2b_Final(unsigned char *md
, BLAKE2B_CTX
*c
)
210 blake2b_increment_counter(c
, c
->buflen
);
211 blake2b_set_lastblock(c
);
213 memset(c
->buf
+ c
->buflen
, 0, sizeof(c
->buf
) - c
->buflen
);
214 blake2b_compress(c
, c
->buf
);
216 /* Output full hash to message digest */
217 for(i
= 0; i
< 8; ++i
) {
218 store64(md
+ sizeof(c
->h
[i
]) * i
, c
->h
[i
]);
221 OPENSSL_cleanse(c
, sizeof(BLAKE2B_CTX
));