[fdt] Add ability to parse a MAC address from a flattened device tree
[ipxe.git] / src / crypto / sha512.c
1 /*
2 * Copyright (C) 2015 Michael Brown <mbrown@fensystems.co.uk>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA.
18 *
19 * You can also choose to distribute this program under the terms of
20 * the Unmodified Binary Distribution Licence (as given in the file
21 * COPYING.UBDL), provided that you have satisfied its requirements.
22 */
23
24 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
25
26 /** @file
27 *
28 * SHA-512 algorithm
29 *
30 */
31
32 #include <stdint.h>
33 #include <string.h>
34 #include <byteswap.h>
35 #include <assert.h>
36 #include <ipxe/rotate.h>
37 #include <ipxe/crypto.h>
38 #include <ipxe/asn1.h>
39 #include <ipxe/sha512.h>
40
41 /** SHA-512 variables */
42 struct sha512_variables {
43 /* This layout matches that of struct sha512_digest_data,
44 * allowing for efficient endianness-conversion,
45 */
46 uint64_t a;
47 uint64_t b;
48 uint64_t c;
49 uint64_t d;
50 uint64_t e;
51 uint64_t f;
52 uint64_t g;
53 uint64_t h;
54 uint64_t w[SHA512_ROUNDS];
55 } __attribute__ (( packed ));
56
57 /** SHA-512 constants */
58 static const uint64_t k[SHA512_ROUNDS] = {
59 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
60 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
61 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
62 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
63 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
64 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
65 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
66 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
67 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
68 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
69 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
70 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
71 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
72 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
73 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
74 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
75 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
76 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
77 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
78 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
79 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
80 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
81 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
82 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
83 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
84 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
85 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
86 };
87
88 /** SHA-512 initial digest values */
89 static const struct sha512_digest sha512_init_digest = {
90 .h = {
91 cpu_to_be64 ( 0x6a09e667f3bcc908ULL ),
92 cpu_to_be64 ( 0xbb67ae8584caa73bULL ),
93 cpu_to_be64 ( 0x3c6ef372fe94f82bULL ),
94 cpu_to_be64 ( 0xa54ff53a5f1d36f1ULL ),
95 cpu_to_be64 ( 0x510e527fade682d1ULL ),
96 cpu_to_be64 ( 0x9b05688c2b3e6c1fULL ),
97 cpu_to_be64 ( 0x1f83d9abfb41bd6bULL ),
98 cpu_to_be64 ( 0x5be0cd19137e2179ULL ),
99 },
100 };
101
102 /**
103 * Initialise SHA-512 family algorithm
104 *
105 * @v context SHA-512 context
106 * @v init Initial digest values
107 * @v digestsize Digest size
108 */
109 void sha512_family_init ( struct sha512_context *context,
110 const struct sha512_digest *init,
111 size_t digestsize ) {
112
113 context->len = 0;
114 context->digestsize = digestsize;
115 memcpy ( &context->ddq.dd.digest, init,
116 sizeof ( context->ddq.dd.digest ) );
117 }
118
119 /**
120 * Initialise SHA-512 algorithm
121 *
122 * @v ctx SHA-512 context
123 */
124 static void sha512_init ( void *ctx ) {
125 struct sha512_context *context = ctx;
126
127 sha512_family_init ( context, &sha512_init_digest,
128 sizeof ( struct sha512_digest ) );
129 }
130
131 /**
132 * Calculate SHA-512 digest of accumulated data
133 *
134 * @v context SHA-512 context
135 */
136 static void sha512_digest ( struct sha512_context *context ) {
137 union {
138 union sha512_digest_data_qwords ddq;
139 struct sha512_variables v;
140 } u;
141 uint64_t *a = &u.v.a;
142 uint64_t *b = &u.v.b;
143 uint64_t *c = &u.v.c;
144 uint64_t *d = &u.v.d;
145 uint64_t *e = &u.v.e;
146 uint64_t *f = &u.v.f;
147 uint64_t *g = &u.v.g;
148 uint64_t *h = &u.v.h;
149 uint64_t *w = u.v.w;
150 uint64_t s0;
151 uint64_t s1;
152 uint64_t maj;
153 uint64_t t1;
154 uint64_t t2;
155 uint64_t ch;
156 unsigned int i;
157
158 /* Sanity checks */
159 assert ( ( context->len % sizeof ( context->ddq.dd.data ) ) == 0 );
160 linker_assert ( &u.ddq.dd.digest.h[0] == a, sha512_bad_layout );
161 linker_assert ( &u.ddq.dd.digest.h[1] == b, sha512_bad_layout );
162 linker_assert ( &u.ddq.dd.digest.h[2] == c, sha512_bad_layout );
163 linker_assert ( &u.ddq.dd.digest.h[3] == d, sha512_bad_layout );
164 linker_assert ( &u.ddq.dd.digest.h[4] == e, sha512_bad_layout );
165 linker_assert ( &u.ddq.dd.digest.h[5] == f, sha512_bad_layout );
166 linker_assert ( &u.ddq.dd.digest.h[6] == g, sha512_bad_layout );
167 linker_assert ( &u.ddq.dd.digest.h[7] == h, sha512_bad_layout );
168 linker_assert ( &u.ddq.dd.data.qword[0] == w, sha512_bad_layout );
169
170 DBGC ( context, "SHA512 digesting:\n" );
171 DBGC_HDA ( context, 0, &context->ddq.dd.digest,
172 sizeof ( context->ddq.dd.digest ) );
173 DBGC_HDA ( context, context->len, &context->ddq.dd.data,
174 sizeof ( context->ddq.dd.data ) );
175
176 /* Convert h[0..7] to host-endian, and initialise a, b, c, d,
177 * e, f, g, h, and w[0..15]
178 */
179 for ( i = 0 ; i < ( sizeof ( u.ddq.qword ) /
180 sizeof ( u.ddq.qword[0] ) ) ; i++ ) {
181 be64_to_cpus ( &context->ddq.qword[i] );
182 u.ddq.qword[i] = context->ddq.qword[i];
183 }
184
185 /* Initialise w[16..79] */
186 for ( i = 16 ; i < SHA512_ROUNDS ; i++ ) {
187 s0 = ( ror64 ( w[i-15], 1 ) ^ ror64 ( w[i-15], 8 ) ^
188 ( w[i-15] >> 7 ) );
189 s1 = ( ror64 ( w[i-2], 19 ) ^ ror64 ( w[i-2], 61 ) ^
190 ( w[i-2] >> 6 ) );
191 w[i] = ( w[i-16] + s0 + w[i-7] + s1 );
192 }
193
194 /* Main loop */
195 for ( i = 0 ; i < SHA512_ROUNDS ; i++ ) {
196 s0 = ( ror64 ( *a, 28 ) ^ ror64 ( *a, 34 ) ^ ror64 ( *a, 39 ) );
197 maj = ( ( *a & *b ) ^ ( *a & *c ) ^ ( *b & *c ) );
198 t2 = ( s0 + maj );
199 s1 = ( ror64 ( *e, 14 ) ^ ror64 ( *e, 18 ) ^ ror64 ( *e, 41 ) );
200 ch = ( ( *e & *f ) ^ ( (~*e) & *g ) );
201 t1 = ( *h + s1 + ch + k[i] + w[i] );
202 *h = *g;
203 *g = *f;
204 *f = *e;
205 *e = ( *d + t1 );
206 *d = *c;
207 *c = *b;
208 *b = *a;
209 *a = ( t1 + t2 );
210 DBGC2 ( context, "%2d : %016llx %016llx %016llx %016llx "
211 "%016llx %016llx %016llx %016llx\n",
212 i, *a, *b, *c, *d, *e, *f, *g, *h );
213 }
214
215 /* Add chunk to hash and convert back to big-endian */
216 for ( i = 0 ; i < 8 ; i++ ) {
217 context->ddq.dd.digest.h[i] =
218 cpu_to_be64 ( context->ddq.dd.digest.h[i] +
219 u.ddq.dd.digest.h[i] );
220 }
221
222 DBGC ( context, "SHA512 digested:\n" );
223 DBGC_HDA ( context, 0, &context->ddq.dd.digest,
224 sizeof ( context->ddq.dd.digest ) );
225 }
226
227 /**
228 * Accumulate data with SHA-512 algorithm
229 *
230 * @v ctx SHA-512 context
231 * @v data Data
232 * @v len Length of data
233 */
234 void sha512_update ( void *ctx, const void *data, size_t len ) {
235 struct sha512_context *context = ctx;
236 const uint8_t *byte = data;
237 size_t offset;
238
239 /* Accumulate data a byte at a time, performing the digest
240 * whenever we fill the data buffer
241 */
242 while ( len-- ) {
243 offset = ( context->len % sizeof ( context->ddq.dd.data ) );
244 context->ddq.dd.data.byte[offset] = *(byte++);
245 context->len++;
246 if ( ( context->len % sizeof ( context->ddq.dd.data ) ) == 0 )
247 sha512_digest ( context );
248 }
249 }
250
251 /**
252 * Generate SHA-512 digest
253 *
254 * @v ctx SHA-512 context
255 * @v out Output buffer
256 */
257 void sha512_final ( void *ctx, void *out ) {
258 struct sha512_context *context = ctx;
259 uint64_t len_bits_hi;
260 uint64_t len_bits_lo;
261 uint8_t pad;
262
263 /* Record length before pre-processing */
264 len_bits_hi = 0;
265 len_bits_lo = cpu_to_be64 ( ( ( uint64_t ) context->len ) * 8 );
266
267 /* Pad with a single "1" bit followed by as many "0" bits as required */
268 pad = 0x80;
269 do {
270 sha512_update ( ctx, &pad, sizeof ( pad ) );
271 pad = 0x00;
272 } while ( ( context->len % sizeof ( context->ddq.dd.data ) ) !=
273 offsetof ( typeof ( context->ddq.dd.data ), final.len_hi ) );
274
275 /* Append length (in bits) */
276 sha512_update ( ctx, &len_bits_hi, sizeof ( len_bits_hi ) );
277 sha512_update ( ctx, &len_bits_lo, sizeof ( len_bits_lo ) );
278 assert ( ( context->len % sizeof ( context->ddq.dd.data ) ) == 0 );
279
280 /* Copy out final digest */
281 memcpy ( out, &context->ddq.dd.digest, context->digestsize );
282 }
283
284 /** SHA-512 algorithm */
285 struct digest_algorithm sha512_algorithm = {
286 .name = "sha512",
287 .ctxsize = sizeof ( struct sha512_context ),
288 .blocksize = sizeof ( union sha512_block ),
289 .digestsize = sizeof ( struct sha512_digest ),
290 .init = sha512_init,
291 .update = sha512_update,
292 .final = sha512_final,
293 };
294
295 /** "sha512" object identifier */
296 static uint8_t oid_sha512[] = { ASN1_OID_SHA512 };
297
298 /** "sha512" OID-identified algorithm */
299 struct asn1_algorithm oid_sha512_algorithm __asn1_algorithm = {
300 .name = "sha512",
301 .digest = &sha512_algorithm,
302 .oid = ASN1_OID_CURSOR ( oid_sha512 ),
303 };