1 /*
2 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
3 * Use is subject to license terms.
4 */
5
6 /*
7 * The basic framework for this code came from the reference
8 * implementation for MD5. That implementation is Copyright (C)
9 * 1991-2, RSA Data Security, Inc. Created 1991. All rights reserved.
10 *
11 * License to copy and use this software is granted provided that it
12 * is identified as the "RSA Data Security, Inc. MD5 Message-Digest
13 * Algorithm" in all material mentioning or referencing this software
14 * or this function.
15 *
16 * License is also granted to make and use derivative works provided
17 * that such works are identified as "derived from the RSA Data
18 * Security, Inc. MD5 Message-Digest Algorithm" in all material
19 * mentioning or referencing the derived work.
20 *
21 * RSA Data Security, Inc. makes no representations concerning either
22 * the merchantability of this software or the suitability of this
23 * software for any particular purpose. It is provided "as is"
24 * without express or implied warranty of any kind.
25 *
26 * These notices must be retained in any copies of any part of this
27 * documentation and/or software.
28 *
29 * NOTE: Cleaned-up and optimized, version of SHA2, based on the FIPS 180-2
30 * standard, available at
31 * http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
32 * Not as fast as one would like -- further optimizations are encouraged
33 * and appreciated.
34 */
35
36 #include <sys/types.h>
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/sysmacros.h>
40 #define _SHA2_IMPL
41 #include <sys/sha2.h>
42 #include <sys/sha2_consts.h>
43
44 #ifdef _KERNEL
45 #include <sys/cmn_err.h>
46
47 #else
48 #include <strings.h>
49 #include <stdlib.h>
50 #include <errno.h>
51
52 #pragma weak SHA256Update = SHA2Update
53 #pragma weak SHA384Update = SHA2Update
54 #pragma weak SHA512Update = SHA2Update
55
56 #pragma weak SHA256Final = SHA2Final
57 #pragma weak SHA384Final = SHA2Final
58 #pragma weak SHA512Final = SHA2Final
59
60 #endif /* _KERNEL */
61
62 #ifdef _LITTLE_ENDIAN
63 #include <sys/byteorder.h>
64 #define HAVE_HTONL
65 #endif
66
67 static void Encode(uint8_t *, uint32_t *, size_t);
68 static void Encode64(uint8_t *, uint64_t *, size_t);
69
70 #if defined(__amd64)
71 #define SHA512Transform(ctx, in) SHA512TransformBlocks((ctx), (in), 1)
72 #define SHA256Transform(ctx, in) SHA256TransformBlocks((ctx), (in), 1)
73
74 void SHA512TransformBlocks(SHA2_CTX *ctx, const void *in, size_t num);
75 void SHA256TransformBlocks(SHA2_CTX *ctx, const void *in, size_t num);
76
77 #else
78 static void SHA256Transform(SHA2_CTX *, const uint8_t *);
79 static void SHA512Transform(SHA2_CTX *, const uint8_t *);
80 #endif /* __amd64 */
81
82 static uint8_t PADDING[128] = { 0x80, /* all zeros */ };
83
84 /* Ch and Maj are the basic SHA2 functions. */
85 #define Ch(b, c, d) (((b) & (c)) ^ ((~b) & (d)))
86 #define Maj(b, c, d) (((b) & (c)) ^ ((b) & (d)) ^ ((c) & (d)))
87
88 /* Rotates x right n bits. */
89 #define ROTR(x, n) \
90 (((x) >> (n)) | ((x) << ((sizeof (x) * NBBY)-(n))))
91
92 /* Shift x right n bits */
93 #define SHR(x, n) ((x) >> (n))
94
95 /* SHA256 Functions */
96 #define BIGSIGMA0_256(x) (ROTR((x), 2) ^ ROTR((x), 13) ^ ROTR((x), 22))
97 #define BIGSIGMA1_256(x) (ROTR((x), 6) ^ ROTR((x), 11) ^ ROTR((x), 25))
98 #define SIGMA0_256(x) (ROTR((x), 7) ^ ROTR((x), 18) ^ SHR((x), 3))
99 #define SIGMA1_256(x) (ROTR((x), 17) ^ ROTR((x), 19) ^ SHR((x), 10))
100
101 #define SHA256ROUND(a, b, c, d, e, f, g, h, i, w) \
102 T1 = h + BIGSIGMA1_256(e) + Ch(e, f, g) + SHA256_CONST(i) + w; \
103 d += T1; \
104 T2 = BIGSIGMA0_256(a) + Maj(a, b, c); \
105 h = T1 + T2
106
107 /* SHA384/512 Functions */
108 #define BIGSIGMA0(x) (ROTR((x), 28) ^ ROTR((x), 34) ^ ROTR((x), 39))
109 #define BIGSIGMA1(x) (ROTR((x), 14) ^ ROTR((x), 18) ^ ROTR((x), 41))
110 #define SIGMA0(x) (ROTR((x), 1) ^ ROTR((x), 8) ^ SHR((x), 7))
111 #define SIGMA1(x) (ROTR((x), 19) ^ ROTR((x), 61) ^ SHR((x), 6))
112 #define SHA512ROUND(a, b, c, d, e, f, g, h, i, w) \
113 T1 = h + BIGSIGMA1(e) + Ch(e, f, g) + SHA512_CONST(i) + w; \
114 d += T1; \
115 T2 = BIGSIGMA0(a) + Maj(a, b, c); \
116 h = T1 + T2
117
118 /*
119 * sparc optimization:
120 *
121 * on the sparc, we can load big endian 32-bit data easily. note that
122 * special care must be taken to ensure the address is 32-bit aligned.
123 * in the interest of speed, we don't check to make sure, since
124 * careful programming can guarantee this for us.
125 */
126
127 #if defined(_BIG_ENDIAN)
128 #define LOAD_BIG_32(addr) (*(uint32_t *)(addr))
129 #define LOAD_BIG_64(addr) (*(uint64_t *)(addr))
130
131 #elif defined(HAVE_HTONL)
132 #define LOAD_BIG_32(addr) htonl(*((uint32_t *)(addr)))
133 #define LOAD_BIG_64(addr) htonll(*((uint64_t *)(addr)))
134
135 #else
136 /* little endian -- will work on big endian, but slowly */
137 #define LOAD_BIG_32(addr) \
138 (((addr)[0] << 24) | ((addr)[1] << 16) | ((addr)[2] << 8) | (addr)[3])
139 #define LOAD_BIG_64(addr) \
140 (((uint64_t)(addr)[0] << 56) | ((uint64_t)(addr)[1] << 48) | \
141 ((uint64_t)(addr)[2] << 40) | ((uint64_t)(addr)[3] << 32) | \
142 ((uint64_t)(addr)[4] << 24) | ((uint64_t)(addr)[5] << 16) | \
143 ((uint64_t)(addr)[6] << 8) | (uint64_t)(addr)[7])
144 #endif /* _BIG_ENDIAN */
145
146
147 #if !defined(__amd64)
148 /* SHA256 Transform */
149
150 static void
151 SHA256Transform(SHA2_CTX *ctx, const uint8_t *blk)
152 {
153 uint32_t a = ctx->state.s32[0];
154 uint32_t b = ctx->state.s32[1];
155 uint32_t c = ctx->state.s32[2];
156 uint32_t d = ctx->state.s32[3];
157 uint32_t e = ctx->state.s32[4];
158 uint32_t f = ctx->state.s32[5];
159 uint32_t g = ctx->state.s32[6];
160 uint32_t h = ctx->state.s32[7];
161
162 uint32_t w0, w1, w2, w3, w4, w5, w6, w7;
163 uint32_t w8, w9, w10, w11, w12, w13, w14, w15;
164 uint32_t T1, T2;
165
166 #if defined(__sparc)
167 static const uint32_t sha256_consts[] = {
168 SHA256_CONST_0, SHA256_CONST_1, SHA256_CONST_2,
169 SHA256_CONST_3, SHA256_CONST_4, SHA256_CONST_5,
170 SHA256_CONST_6, SHA256_CONST_7, SHA256_CONST_8,
171 SHA256_CONST_9, SHA256_CONST_10, SHA256_CONST_11,
172 SHA256_CONST_12, SHA256_CONST_13, SHA256_CONST_14,
173 SHA256_CONST_15, SHA256_CONST_16, SHA256_CONST_17,
174 SHA256_CONST_18, SHA256_CONST_19, SHA256_CONST_20,
175 SHA256_CONST_21, SHA256_CONST_22, SHA256_CONST_23,
176 SHA256_CONST_24, SHA256_CONST_25, SHA256_CONST_26,
177 SHA256_CONST_27, SHA256_CONST_28, SHA256_CONST_29,
178 SHA256_CONST_30, SHA256_CONST_31, SHA256_CONST_32,
179 SHA256_CONST_33, SHA256_CONST_34, SHA256_CONST_35,
180 SHA256_CONST_36, SHA256_CONST_37, SHA256_CONST_38,
181 SHA256_CONST_39, SHA256_CONST_40, SHA256_CONST_41,
182 SHA256_CONST_42, SHA256_CONST_43, SHA256_CONST_44,
183 SHA256_CONST_45, SHA256_CONST_46, SHA256_CONST_47,
184 SHA256_CONST_48, SHA256_CONST_49, SHA256_CONST_50,
185 SHA256_CONST_51, SHA256_CONST_52, SHA256_CONST_53,
186 SHA256_CONST_54, SHA256_CONST_55, SHA256_CONST_56,
187 SHA256_CONST_57, SHA256_CONST_58, SHA256_CONST_59,
188 SHA256_CONST_60, SHA256_CONST_61, SHA256_CONST_62,
189 SHA256_CONST_63
190 };
191 #endif /* __sparc */
192
193 if ((uintptr_t)blk & 0x3) { /* not 4-byte aligned? */
194 bcopy(blk, ctx->buf_un.buf32, sizeof (ctx->buf_un.buf32));
195 blk = (uint8_t *)ctx->buf_un.buf32;
196 }
197
198 /* LINTED E_BAD_PTR_CAST_ALIGN */
199 w0 = LOAD_BIG_32(blk + 4 * 0);
200 SHA256ROUND(a, b, c, d, e, f, g, h, 0, w0);
201 /* LINTED E_BAD_PTR_CAST_ALIGN */
202 w1 = LOAD_BIG_32(blk + 4 * 1);
203 SHA256ROUND(h, a, b, c, d, e, f, g, 1, w1);
204 /* LINTED E_BAD_PTR_CAST_ALIGN */
205 w2 = LOAD_BIG_32(blk + 4 * 2);
206 SHA256ROUND(g, h, a, b, c, d, e, f, 2, w2);
207 /* LINTED E_BAD_PTR_CAST_ALIGN */
208 w3 = LOAD_BIG_32(blk + 4 * 3);
209 SHA256ROUND(f, g, h, a, b, c, d, e, 3, w3);
210 /* LINTED E_BAD_PTR_CAST_ALIGN */
211 w4 = LOAD_BIG_32(blk + 4 * 4);
212 SHA256ROUND(e, f, g, h, a, b, c, d, 4, w4);
213 /* LINTED E_BAD_PTR_CAST_ALIGN */
214 w5 = LOAD_BIG_32(blk + 4 * 5);
215 SHA256ROUND(d, e, f, g, h, a, b, c, 5, w5);
216 /* LINTED E_BAD_PTR_CAST_ALIGN */
217 w6 = LOAD_BIG_32(blk + 4 * 6);
218 SHA256ROUND(c, d, e, f, g, h, a, b, 6, w6);
219 /* LINTED E_BAD_PTR_CAST_ALIGN */
220 w7 = LOAD_BIG_32(blk + 4 * 7);
221 SHA256ROUND(b, c, d, e, f, g, h, a, 7, w7);
222 /* LINTED E_BAD_PTR_CAST_ALIGN */
223 w8 = LOAD_BIG_32(blk + 4 * 8);
224 SHA256ROUND(a, b, c, d, e, f, g, h, 8, w8);
225 /* LINTED E_BAD_PTR_CAST_ALIGN */
226 w9 = LOAD_BIG_32(blk + 4 * 9);
227 SHA256ROUND(h, a, b, c, d, e, f, g, 9, w9);
228 /* LINTED E_BAD_PTR_CAST_ALIGN */
229 w10 = LOAD_BIG_32(blk + 4 * 10);
230 SHA256ROUND(g, h, a, b, c, d, e, f, 10, w10);
231 /* LINTED E_BAD_PTR_CAST_ALIGN */
232 w11 = LOAD_BIG_32(blk + 4 * 11);
233 SHA256ROUND(f, g, h, a, b, c, d, e, 11, w11);
234 /* LINTED E_BAD_PTR_CAST_ALIGN */
235 w12 = LOAD_BIG_32(blk + 4 * 12);
236 SHA256ROUND(e, f, g, h, a, b, c, d, 12, w12);
237 /* LINTED E_BAD_PTR_CAST_ALIGN */
238 w13 = LOAD_BIG_32(blk + 4 * 13);
239 SHA256ROUND(d, e, f, g, h, a, b, c, 13, w13);
240 /* LINTED E_BAD_PTR_CAST_ALIGN */
241 w14 = LOAD_BIG_32(blk + 4 * 14);
242 SHA256ROUND(c, d, e, f, g, h, a, b, 14, w14);
243 /* LINTED E_BAD_PTR_CAST_ALIGN */
244 w15 = LOAD_BIG_32(blk + 4 * 15);
245 SHA256ROUND(b, c, d, e, f, g, h, a, 15, w15);
246
247 w0 = SIGMA1_256(w14) + w9 + SIGMA0_256(w1) + w0;
248 SHA256ROUND(a, b, c, d, e, f, g, h, 16, w0);
249 w1 = SIGMA1_256(w15) + w10 + SIGMA0_256(w2) + w1;
250 SHA256ROUND(h, a, b, c, d, e, f, g, 17, w1);
251 w2 = SIGMA1_256(w0) + w11 + SIGMA0_256(w3) + w2;
252 SHA256ROUND(g, h, a, b, c, d, e, f, 18, w2);
253 w3 = SIGMA1_256(w1) + w12 + SIGMA0_256(w4) + w3;
254 SHA256ROUND(f, g, h, a, b, c, d, e, 19, w3);
255 w4 = SIGMA1_256(w2) + w13 + SIGMA0_256(w5) + w4;
256 SHA256ROUND(e, f, g, h, a, b, c, d, 20, w4);
257 w5 = SIGMA1_256(w3) + w14 + SIGMA0_256(w6) + w5;
258 SHA256ROUND(d, e, f, g, h, a, b, c, 21, w5);
259 w6 = SIGMA1_256(w4) + w15 + SIGMA0_256(w7) + w6;
260 SHA256ROUND(c, d, e, f, g, h, a, b, 22, w6);
261 w7 = SIGMA1_256(w5) + w0 + SIGMA0_256(w8) + w7;
262 SHA256ROUND(b, c, d, e, f, g, h, a, 23, w7);
263 w8 = SIGMA1_256(w6) + w1 + SIGMA0_256(w9) + w8;
264 SHA256ROUND(a, b, c, d, e, f, g, h, 24, w8);
265 w9 = SIGMA1_256(w7) + w2 + SIGMA0_256(w10) + w9;
266 SHA256ROUND(h, a, b, c, d, e, f, g, 25, w9);
267 w10 = SIGMA1_256(w8) + w3 + SIGMA0_256(w11) + w10;
268 SHA256ROUND(g, h, a, b, c, d, e, f, 26, w10);
269 w11 = SIGMA1_256(w9) + w4 + SIGMA0_256(w12) + w11;
270 SHA256ROUND(f, g, h, a, b, c, d, e, 27, w11);
271 w12 = SIGMA1_256(w10) + w5 + SIGMA0_256(w13) + w12;
272 SHA256ROUND(e, f, g, h, a, b, c, d, 28, w12);
273 w13 = SIGMA1_256(w11) + w6 + SIGMA0_256(w14) + w13;
274 SHA256ROUND(d, e, f, g, h, a, b, c, 29, w13);
275 w14 = SIGMA1_256(w12) + w7 + SIGMA0_256(w15) + w14;
276 SHA256ROUND(c, d, e, f, g, h, a, b, 30, w14);
277 w15 = SIGMA1_256(w13) + w8 + SIGMA0_256(w0) + w15;
278 SHA256ROUND(b, c, d, e, f, g, h, a, 31, w15);
279
280 w0 = SIGMA1_256(w14) + w9 + SIGMA0_256(w1) + w0;
281 SHA256ROUND(a, b, c, d, e, f, g, h, 32, w0);
282 w1 = SIGMA1_256(w15) + w10 + SIGMA0_256(w2) + w1;
283 SHA256ROUND(h, a, b, c, d, e, f, g, 33, w1);
284 w2 = SIGMA1_256(w0) + w11 + SIGMA0_256(w3) + w2;
285 SHA256ROUND(g, h, a, b, c, d, e, f, 34, w2);
286 w3 = SIGMA1_256(w1) + w12 + SIGMA0_256(w4) + w3;
287 SHA256ROUND(f, g, h, a, b, c, d, e, 35, w3);
288 w4 = SIGMA1_256(w2) + w13 + SIGMA0_256(w5) + w4;
289 SHA256ROUND(e, f, g, h, a, b, c, d, 36, w4);
290 w5 = SIGMA1_256(w3) + w14 + SIGMA0_256(w6) + w5;
291 SHA256ROUND(d, e, f, g, h, a, b, c, 37, w5);
292 w6 = SIGMA1_256(w4) + w15 + SIGMA0_256(w7) + w6;
293 SHA256ROUND(c, d, e, f, g, h, a, b, 38, w6);
294 w7 = SIGMA1_256(w5) + w0 + SIGMA0_256(w8) + w7;
295 SHA256ROUND(b, c, d, e, f, g, h, a, 39, w7);
296 w8 = SIGMA1_256(w6) + w1 + SIGMA0_256(w9) + w8;
297 SHA256ROUND(a, b, c, d, e, f, g, h, 40, w8);
298 w9 = SIGMA1_256(w7) + w2 + SIGMA0_256(w10) + w9;
299 SHA256ROUND(h, a, b, c, d, e, f, g, 41, w9);
300 w10 = SIGMA1_256(w8) + w3 + SIGMA0_256(w11) + w10;
301 SHA256ROUND(g, h, a, b, c, d, e, f, 42, w10);
302 w11 = SIGMA1_256(w9) + w4 + SIGMA0_256(w12) + w11;
303 SHA256ROUND(f, g, h, a, b, c, d, e, 43, w11);
304 w12 = SIGMA1_256(w10) + w5 + SIGMA0_256(w13) + w12;
305 SHA256ROUND(e, f, g, h, a, b, c, d, 44, w12);
306 w13 = SIGMA1_256(w11) + w6 + SIGMA0_256(w14) + w13;
307 SHA256ROUND(d, e, f, g, h, a, b, c, 45, w13);
308 w14 = SIGMA1_256(w12) + w7 + SIGMA0_256(w15) + w14;
309 SHA256ROUND(c, d, e, f, g, h, a, b, 46, w14);
310 w15 = SIGMA1_256(w13) + w8 + SIGMA0_256(w0) + w15;
311 SHA256ROUND(b, c, d, e, f, g, h, a, 47, w15);
312
313 w0 = SIGMA1_256(w14) + w9 + SIGMA0_256(w1) + w0;
314 SHA256ROUND(a, b, c, d, e, f, g, h, 48, w0);
315 w1 = SIGMA1_256(w15) + w10 + SIGMA0_256(w2) + w1;
316 SHA256ROUND(h, a, b, c, d, e, f, g, 49, w1);
317 w2 = SIGMA1_256(w0) + w11 + SIGMA0_256(w3) + w2;
318 SHA256ROUND(g, h, a, b, c, d, e, f, 50, w2);
319 w3 = SIGMA1_256(w1) + w12 + SIGMA0_256(w4) + w3;
320 SHA256ROUND(f, g, h, a, b, c, d, e, 51, w3);
321 w4 = SIGMA1_256(w2) + w13 + SIGMA0_256(w5) + w4;
322 SHA256ROUND(e, f, g, h, a, b, c, d, 52, w4);
323 w5 = SIGMA1_256(w3) + w14 + SIGMA0_256(w6) + w5;
324 SHA256ROUND(d, e, f, g, h, a, b, c, 53, w5);
325 w6 = SIGMA1_256(w4) + w15 + SIGMA0_256(w7) + w6;
326 SHA256ROUND(c, d, e, f, g, h, a, b, 54, w6);
327 w7 = SIGMA1_256(w5) + w0 + SIGMA0_256(w8) + w7;
328 SHA256ROUND(b, c, d, e, f, g, h, a, 55, w7);
329 w8 = SIGMA1_256(w6) + w1 + SIGMA0_256(w9) + w8;
330 SHA256ROUND(a, b, c, d, e, f, g, h, 56, w8);
331 w9 = SIGMA1_256(w7) + w2 + SIGMA0_256(w10) + w9;
332 SHA256ROUND(h, a, b, c, d, e, f, g, 57, w9);
333 w10 = SIGMA1_256(w8) + w3 + SIGMA0_256(w11) + w10;
334 SHA256ROUND(g, h, a, b, c, d, e, f, 58, w10);
335 w11 = SIGMA1_256(w9) + w4 + SIGMA0_256(w12) + w11;
336 SHA256ROUND(f, g, h, a, b, c, d, e, 59, w11);
337 w12 = SIGMA1_256(w10) + w5 + SIGMA0_256(w13) + w12;
338 SHA256ROUND(e, f, g, h, a, b, c, d, 60, w12);
339 w13 = SIGMA1_256(w11) + w6 + SIGMA0_256(w14) + w13;
340 SHA256ROUND(d, e, f, g, h, a, b, c, 61, w13);
341 w14 = SIGMA1_256(w12) + w7 + SIGMA0_256(w15) + w14;
342 SHA256ROUND(c, d, e, f, g, h, a, b, 62, w14);
343 w15 = SIGMA1_256(w13) + w8 + SIGMA0_256(w0) + w15;
344 SHA256ROUND(b, c, d, e, f, g, h, a, 63, w15);
345
346 ctx->state.s32[0] += a;
347 ctx->state.s32[1] += b;
348 ctx->state.s32[2] += c;
349 ctx->state.s32[3] += d;
350 ctx->state.s32[4] += e;
351 ctx->state.s32[5] += f;
352 ctx->state.s32[6] += g;
353 ctx->state.s32[7] += h;
354 }
355
356
357 /* SHA384 and SHA512 Transform */
358
359 static void
360 SHA512Transform(SHA2_CTX *ctx, const uint8_t *blk)
361 {
362
363 uint64_t a = ctx->state.s64[0];
364 uint64_t b = ctx->state.s64[1];
365 uint64_t c = ctx->state.s64[2];
366 uint64_t d = ctx->state.s64[3];
367 uint64_t e = ctx->state.s64[4];
368 uint64_t f = ctx->state.s64[5];
369 uint64_t g = ctx->state.s64[6];
370 uint64_t h = ctx->state.s64[7];
371
372 uint64_t w0, w1, w2, w3, w4, w5, w6, w7;
373 uint64_t w8, w9, w10, w11, w12, w13, w14, w15;
374 uint64_t T1, T2;
375
376 #if defined(__sparc)
377 static const uint64_t sha512_consts[] = {
378 SHA512_CONST_0, SHA512_CONST_1, SHA512_CONST_2,
379 SHA512_CONST_3, SHA512_CONST_4, SHA512_CONST_5,
380 SHA512_CONST_6, SHA512_CONST_7, SHA512_CONST_8,
381 SHA512_CONST_9, SHA512_CONST_10, SHA512_CONST_11,
382 SHA512_CONST_12, SHA512_CONST_13, SHA512_CONST_14,
383 SHA512_CONST_15, SHA512_CONST_16, SHA512_CONST_17,
384 SHA512_CONST_18, SHA512_CONST_19, SHA512_CONST_20,
385 SHA512_CONST_21, SHA512_CONST_22, SHA512_CONST_23,
386 SHA512_CONST_24, SHA512_CONST_25, SHA512_CONST_26,
387 SHA512_CONST_27, SHA512_CONST_28, SHA512_CONST_29,
388 SHA512_CONST_30, SHA512_CONST_31, SHA512_CONST_32,
389 SHA512_CONST_33, SHA512_CONST_34, SHA512_CONST_35,
390 SHA512_CONST_36, SHA512_CONST_37, SHA512_CONST_38,
391 SHA512_CONST_39, SHA512_CONST_40, SHA512_CONST_41,
392 SHA512_CONST_42, SHA512_CONST_43, SHA512_CONST_44,
393 SHA512_CONST_45, SHA512_CONST_46, SHA512_CONST_47,
394 SHA512_CONST_48, SHA512_CONST_49, SHA512_CONST_50,
395 SHA512_CONST_51, SHA512_CONST_52, SHA512_CONST_53,
396 SHA512_CONST_54, SHA512_CONST_55, SHA512_CONST_56,
397 SHA512_CONST_57, SHA512_CONST_58, SHA512_CONST_59,
398 SHA512_CONST_60, SHA512_CONST_61, SHA512_CONST_62,
399 SHA512_CONST_63, SHA512_CONST_64, SHA512_CONST_65,
400 SHA512_CONST_66, SHA512_CONST_67, SHA512_CONST_68,
401 SHA512_CONST_69, SHA512_CONST_70, SHA512_CONST_71,
402 SHA512_CONST_72, SHA512_CONST_73, SHA512_CONST_74,
403 SHA512_CONST_75, SHA512_CONST_76, SHA512_CONST_77,
404 SHA512_CONST_78, SHA512_CONST_79
405 };
406 #endif /* __sparc */
407
408
409 if ((uintptr_t)blk & 0x7) { /* not 8-byte aligned? */
410 bcopy(blk, ctx->buf_un.buf64, sizeof (ctx->buf_un.buf64));
411 blk = (uint8_t *)ctx->buf_un.buf64;
412 }
413
414 /* LINTED E_BAD_PTR_CAST_ALIGN */
415 w0 = LOAD_BIG_64(blk + 8 * 0);
416 SHA512ROUND(a, b, c, d, e, f, g, h, 0, w0);
417 /* LINTED E_BAD_PTR_CAST_ALIGN */
418 w1 = LOAD_BIG_64(blk + 8 * 1);
419 SHA512ROUND(h, a, b, c, d, e, f, g, 1, w1);
420 /* LINTED E_BAD_PTR_CAST_ALIGN */
421 w2 = LOAD_BIG_64(blk + 8 * 2);
422 SHA512ROUND(g, h, a, b, c, d, e, f, 2, w2);
423 /* LINTED E_BAD_PTR_CAST_ALIGN */
424 w3 = LOAD_BIG_64(blk + 8 * 3);
425 SHA512ROUND(f, g, h, a, b, c, d, e, 3, w3);
426 /* LINTED E_BAD_PTR_CAST_ALIGN */
427 w4 = LOAD_BIG_64(blk + 8 * 4);
428 SHA512ROUND(e, f, g, h, a, b, c, d, 4, w4);
429 /* LINTED E_BAD_PTR_CAST_ALIGN */
430 w5 = LOAD_BIG_64(blk + 8 * 5);
431 SHA512ROUND(d, e, f, g, h, a, b, c, 5, w5);
432 /* LINTED E_BAD_PTR_CAST_ALIGN */
433 w6 = LOAD_BIG_64(blk + 8 * 6);
434 SHA512ROUND(c, d, e, f, g, h, a, b, 6, w6);
435 /* LINTED E_BAD_PTR_CAST_ALIGN */
436 w7 = LOAD_BIG_64(blk + 8 * 7);
437 SHA512ROUND(b, c, d, e, f, g, h, a, 7, w7);
438 /* LINTED E_BAD_PTR_CAST_ALIGN */
439 w8 = LOAD_BIG_64(blk + 8 * 8);
440 SHA512ROUND(a, b, c, d, e, f, g, h, 8, w8);
441 /* LINTED E_BAD_PTR_CAST_ALIGN */
442 w9 = LOAD_BIG_64(blk + 8 * 9);
443 SHA512ROUND(h, a, b, c, d, e, f, g, 9, w9);
444 /* LINTED E_BAD_PTR_CAST_ALIGN */
445 w10 = LOAD_BIG_64(blk + 8 * 10);
446 SHA512ROUND(g, h, a, b, c, d, e, f, 10, w10);
447 /* LINTED E_BAD_PTR_CAST_ALIGN */
448 w11 = LOAD_BIG_64(blk + 8 * 11);
449 SHA512ROUND(f, g, h, a, b, c, d, e, 11, w11);
450 /* LINTED E_BAD_PTR_CAST_ALIGN */
451 w12 = LOAD_BIG_64(blk + 8 * 12);
452 SHA512ROUND(e, f, g, h, a, b, c, d, 12, w12);
453 /* LINTED E_BAD_PTR_CAST_ALIGN */
454 w13 = LOAD_BIG_64(blk + 8 * 13);
455 SHA512ROUND(d, e, f, g, h, a, b, c, 13, w13);
456 /* LINTED E_BAD_PTR_CAST_ALIGN */
457 w14 = LOAD_BIG_64(blk + 8 * 14);
458 SHA512ROUND(c, d, e, f, g, h, a, b, 14, w14);
459 /* LINTED E_BAD_PTR_CAST_ALIGN */
460 w15 = LOAD_BIG_64(blk + 8 * 15);
461 SHA512ROUND(b, c, d, e, f, g, h, a, 15, w15);
462
463 w0 = SIGMA1(w14) + w9 + SIGMA0(w1) + w0;
464 SHA512ROUND(a, b, c, d, e, f, g, h, 16, w0);
465 w1 = SIGMA1(w15) + w10 + SIGMA0(w2) + w1;
466 SHA512ROUND(h, a, b, c, d, e, f, g, 17, w1);
467 w2 = SIGMA1(w0) + w11 + SIGMA0(w3) + w2;
468 SHA512ROUND(g, h, a, b, c, d, e, f, 18, w2);
469 w3 = SIGMA1(w1) + w12 + SIGMA0(w4) + w3;
470 SHA512ROUND(f, g, h, a, b, c, d, e, 19, w3);
471 w4 = SIGMA1(w2) + w13 + SIGMA0(w5) + w4;
472 SHA512ROUND(e, f, g, h, a, b, c, d, 20, w4);
473 w5 = SIGMA1(w3) + w14 + SIGMA0(w6) + w5;
474 SHA512ROUND(d, e, f, g, h, a, b, c, 21, w5);
475 w6 = SIGMA1(w4) + w15 + SIGMA0(w7) + w6;
476 SHA512ROUND(c, d, e, f, g, h, a, b, 22, w6);
477 w7 = SIGMA1(w5) + w0 + SIGMA0(w8) + w7;
478 SHA512ROUND(b, c, d, e, f, g, h, a, 23, w7);
479 w8 = SIGMA1(w6) + w1 + SIGMA0(w9) + w8;
480 SHA512ROUND(a, b, c, d, e, f, g, h, 24, w8);
481 w9 = SIGMA1(w7) + w2 + SIGMA0(w10) + w9;
482 SHA512ROUND(h, a, b, c, d, e, f, g, 25, w9);
483 w10 = SIGMA1(w8) + w3 + SIGMA0(w11) + w10;
484 SHA512ROUND(g, h, a, b, c, d, e, f, 26, w10);
485 w11 = SIGMA1(w9) + w4 + SIGMA0(w12) + w11;
486 SHA512ROUND(f, g, h, a, b, c, d, e, 27, w11);
487 w12 = SIGMA1(w10) + w5 + SIGMA0(w13) + w12;
488 SHA512ROUND(e, f, g, h, a, b, c, d, 28, w12);
489 w13 = SIGMA1(w11) + w6 + SIGMA0(w14) + w13;
490 SHA512ROUND(d, e, f, g, h, a, b, c, 29, w13);
491 w14 = SIGMA1(w12) + w7 + SIGMA0(w15) + w14;
492 SHA512ROUND(c, d, e, f, g, h, a, b, 30, w14);
493 w15 = SIGMA1(w13) + w8 + SIGMA0(w0) + w15;
494 SHA512ROUND(b, c, d, e, f, g, h, a, 31, w15);
495
496 w0 = SIGMA1(w14) + w9 + SIGMA0(w1) + w0;
497 SHA512ROUND(a, b, c, d, e, f, g, h, 32, w0);
498 w1 = SIGMA1(w15) + w10 + SIGMA0(w2) + w1;
499 SHA512ROUND(h, a, b, c, d, e, f, g, 33, w1);
500 w2 = SIGMA1(w0) + w11 + SIGMA0(w3) + w2;
501 SHA512ROUND(g, h, a, b, c, d, e, f, 34, w2);
502 w3 = SIGMA1(w1) + w12 + SIGMA0(w4) + w3;
503 SHA512ROUND(f, g, h, a, b, c, d, e, 35, w3);
504 w4 = SIGMA1(w2) + w13 + SIGMA0(w5) + w4;
505 SHA512ROUND(e, f, g, h, a, b, c, d, 36, w4);
506 w5 = SIGMA1(w3) + w14 + SIGMA0(w6) + w5;
507 SHA512ROUND(d, e, f, g, h, a, b, c, 37, w5);
508 w6 = SIGMA1(w4) + w15 + SIGMA0(w7) + w6;
509 SHA512ROUND(c, d, e, f, g, h, a, b, 38, w6);
510 w7 = SIGMA1(w5) + w0 + SIGMA0(w8) + w7;
511 SHA512ROUND(b, c, d, e, f, g, h, a, 39, w7);
512 w8 = SIGMA1(w6) + w1 + SIGMA0(w9) + w8;
513 SHA512ROUND(a, b, c, d, e, f, g, h, 40, w8);
514 w9 = SIGMA1(w7) + w2 + SIGMA0(w10) + w9;
515 SHA512ROUND(h, a, b, c, d, e, f, g, 41, w9);
516 w10 = SIGMA1(w8) + w3 + SIGMA0(w11) + w10;
517 SHA512ROUND(g, h, a, b, c, d, e, f, 42, w10);
518 w11 = SIGMA1(w9) + w4 + SIGMA0(w12) + w11;
519 SHA512ROUND(f, g, h, a, b, c, d, e, 43, w11);
520 w12 = SIGMA1(w10) + w5 + SIGMA0(w13) + w12;
521 SHA512ROUND(e, f, g, h, a, b, c, d, 44, w12);
522 w13 = SIGMA1(w11) + w6 + SIGMA0(w14) + w13;
523 SHA512ROUND(d, e, f, g, h, a, b, c, 45, w13);
524 w14 = SIGMA1(w12) + w7 + SIGMA0(w15) + w14;
525 SHA512ROUND(c, d, e, f, g, h, a, b, 46, w14);
526 w15 = SIGMA1(w13) + w8 + SIGMA0(w0) + w15;
527 SHA512ROUND(b, c, d, e, f, g, h, a, 47, w15);
528
529 w0 = SIGMA1(w14) + w9 + SIGMA0(w1) + w0;
530 SHA512ROUND(a, b, c, d, e, f, g, h, 48, w0);
531 w1 = SIGMA1(w15) + w10 + SIGMA0(w2) + w1;
532 SHA512ROUND(h, a, b, c, d, e, f, g, 49, w1);
533 w2 = SIGMA1(w0) + w11 + SIGMA0(w3) + w2;
534 SHA512ROUND(g, h, a, b, c, d, e, f, 50, w2);
535 w3 = SIGMA1(w1) + w12 + SIGMA0(w4) + w3;
536 SHA512ROUND(f, g, h, a, b, c, d, e, 51, w3);
537 w4 = SIGMA1(w2) + w13 + SIGMA0(w5) + w4;
538 SHA512ROUND(e, f, g, h, a, b, c, d, 52, w4);
539 w5 = SIGMA1(w3) + w14 + SIGMA0(w6) + w5;
540 SHA512ROUND(d, e, f, g, h, a, b, c, 53, w5);
541 w6 = SIGMA1(w4) + w15 + SIGMA0(w7) + w6;
542 SHA512ROUND(c, d, e, f, g, h, a, b, 54, w6);
543 w7 = SIGMA1(w5) + w0 + SIGMA0(w8) + w7;
544 SHA512ROUND(b, c, d, e, f, g, h, a, 55, w7);
545 w8 = SIGMA1(w6) + w1 + SIGMA0(w9) + w8;
546 SHA512ROUND(a, b, c, d, e, f, g, h, 56, w8);
547 w9 = SIGMA1(w7) + w2 + SIGMA0(w10) + w9;
548 SHA512ROUND(h, a, b, c, d, e, f, g, 57, w9);
549 w10 = SIGMA1(w8) + w3 + SIGMA0(w11) + w10;
550 SHA512ROUND(g, h, a, b, c, d, e, f, 58, w10);
551 w11 = SIGMA1(w9) + w4 + SIGMA0(w12) + w11;
552 SHA512ROUND(f, g, h, a, b, c, d, e, 59, w11);
553 w12 = SIGMA1(w10) + w5 + SIGMA0(w13) + w12;
554 SHA512ROUND(e, f, g, h, a, b, c, d, 60, w12);
555 w13 = SIGMA1(w11) + w6 + SIGMA0(w14) + w13;
556 SHA512ROUND(d, e, f, g, h, a, b, c, 61, w13);
557 w14 = SIGMA1(w12) + w7 + SIGMA0(w15) + w14;
558 SHA512ROUND(c, d, e, f, g, h, a, b, 62, w14);
559 w15 = SIGMA1(w13) + w8 + SIGMA0(w0) + w15;
560 SHA512ROUND(b, c, d, e, f, g, h, a, 63, w15);
561
562 w0 = SIGMA1(w14) + w9 + SIGMA0(w1) + w0;
563 SHA512ROUND(a, b, c, d, e, f, g, h, 64, w0);
564 w1 = SIGMA1(w15) + w10 + SIGMA0(w2) + w1;
565 SHA512ROUND(h, a, b, c, d, e, f, g, 65, w1);
566 w2 = SIGMA1(w0) + w11 + SIGMA0(w3) + w2;
567 SHA512ROUND(g, h, a, b, c, d, e, f, 66, w2);
568 w3 = SIGMA1(w1) + w12 + SIGMA0(w4) + w3;
569 SHA512ROUND(f, g, h, a, b, c, d, e, 67, w3);
570 w4 = SIGMA1(w2) + w13 + SIGMA0(w5) + w4;
571 SHA512ROUND(e, f, g, h, a, b, c, d, 68, w4);
572 w5 = SIGMA1(w3) + w14 + SIGMA0(w6) + w5;
573 SHA512ROUND(d, e, f, g, h, a, b, c, 69, w5);
574 w6 = SIGMA1(w4) + w15 + SIGMA0(w7) + w6;
575 SHA512ROUND(c, d, e, f, g, h, a, b, 70, w6);
576 w7 = SIGMA1(w5) + w0 + SIGMA0(w8) + w7;
577 SHA512ROUND(b, c, d, e, f, g, h, a, 71, w7);
578 w8 = SIGMA1(w6) + w1 + SIGMA0(w9) + w8;
579 SHA512ROUND(a, b, c, d, e, f, g, h, 72, w8);
580 w9 = SIGMA1(w7) + w2 + SIGMA0(w10) + w9;
581 SHA512ROUND(h, a, b, c, d, e, f, g, 73, w9);
582 w10 = SIGMA1(w8) + w3 + SIGMA0(w11) + w10;
583 SHA512ROUND(g, h, a, b, c, d, e, f, 74, w10);
584 w11 = SIGMA1(w9) + w4 + SIGMA0(w12) + w11;
585 SHA512ROUND(f, g, h, a, b, c, d, e, 75, w11);
586 w12 = SIGMA1(w10) + w5 + SIGMA0(w13) + w12;
587 SHA512ROUND(e, f, g, h, a, b, c, d, 76, w12);
588 w13 = SIGMA1(w11) + w6 + SIGMA0(w14) + w13;
589 SHA512ROUND(d, e, f, g, h, a, b, c, 77, w13);
590 w14 = SIGMA1(w12) + w7 + SIGMA0(w15) + w14;
591 SHA512ROUND(c, d, e, f, g, h, a, b, 78, w14);
592 w15 = SIGMA1(w13) + w8 + SIGMA0(w0) + w15;
593 SHA512ROUND(b, c, d, e, f, g, h, a, 79, w15);
594
595 ctx->state.s64[0] += a;
596 ctx->state.s64[1] += b;
597 ctx->state.s64[2] += c;
598 ctx->state.s64[3] += d;
599 ctx->state.s64[4] += e;
600 ctx->state.s64[5] += f;
601 ctx->state.s64[6] += g;
602 ctx->state.s64[7] += h;
603
604 }
605 #endif /* !__amd64 */
606
607
608 /*
609 * Encode()
610 *
611 * purpose: to convert a list of numbers from little endian to big endian
612 * input: uint8_t * : place to store the converted big endian numbers
613 * uint32_t * : place to get numbers to convert from
614 * size_t : the length of the input in bytes
615 * output: void
616 */
617
618 static void
619 Encode(uint8_t *_RESTRICT_KYWD output, uint32_t *_RESTRICT_KYWD input,
620 size_t len)
621 {
622 size_t i, j;
623
624 #if defined(__sparc)
625 if (IS_P2ALIGNED(output, sizeof (uint32_t))) {
626 for (i = 0, j = 0; j < len; i++, j += 4) {
627 /* LINTED: pointer alignment */
628 *((uint32_t *)(output + j)) = input[i];
629 }
630 } else {
631 #endif /* little endian -- will work on big endian, but slowly */
632 for (i = 0, j = 0; j < len; i++, j += 4) {
633 output[j] = (input[i] >> 24) & 0xff;
634 output[j + 1] = (input[i] >> 16) & 0xff;
635 output[j + 2] = (input[i] >> 8) & 0xff;
636 output[j + 3] = input[i] & 0xff;
637 }
638 #if defined(__sparc)
639 }
640 #endif
641 }
642
643 static void
644 Encode64(uint8_t *_RESTRICT_KYWD output, uint64_t *_RESTRICT_KYWD input,
645 size_t len)
646 {
647 size_t i, j;
648
649 #if defined(__sparc)
650 if (IS_P2ALIGNED(output, sizeof (uint64_t))) {
651 for (i = 0, j = 0; j < len; i++, j += 8) {
652 /* LINTED: pointer alignment */
653 *((uint64_t *)(output + j)) = input[i];
654 }
655 } else {
656 #endif /* little endian -- will work on big endian, but slowly */
657 for (i = 0, j = 0; j < len; i++, j += 8) {
658
659 output[j] = (input[i] >> 56) & 0xff;
660 output[j + 1] = (input[i] >> 48) & 0xff;
661 output[j + 2] = (input[i] >> 40) & 0xff;
662 output[j + 3] = (input[i] >> 32) & 0xff;
663 output[j + 4] = (input[i] >> 24) & 0xff;
664 output[j + 5] = (input[i] >> 16) & 0xff;
665 output[j + 6] = (input[i] >> 8) & 0xff;
666 output[j + 7] = input[i] & 0xff;
667 }
668 #if defined(__sparc)
669 }
670 #endif
671 }
672
673
674 void
675 SHA2Init(uint64_t mech, SHA2_CTX *ctx)
676 {
677
678 switch (mech) {
679 case SHA256_MECH_INFO_TYPE:
680 case SHA256_HMAC_MECH_INFO_TYPE:
681 case SHA256_HMAC_GEN_MECH_INFO_TYPE:
682 ctx->state.s32[0] = 0x6a09e667U;
683 ctx->state.s32[1] = 0xbb67ae85U;
684 ctx->state.s32[2] = 0x3c6ef372U;
685 ctx->state.s32[3] = 0xa54ff53aU;
686 ctx->state.s32[4] = 0x510e527fU;
687 ctx->state.s32[5] = 0x9b05688cU;
688 ctx->state.s32[6] = 0x1f83d9abU;
689 ctx->state.s32[7] = 0x5be0cd19U;
690 break;
691 case SHA384_MECH_INFO_TYPE:
692 case SHA384_HMAC_MECH_INFO_TYPE:
693 case SHA384_HMAC_GEN_MECH_INFO_TYPE:
694 ctx->state.s64[0] = 0xcbbb9d5dc1059ed8ULL;
695 ctx->state.s64[1] = 0x629a292a367cd507ULL;
696 ctx->state.s64[2] = 0x9159015a3070dd17ULL;
697 ctx->state.s64[3] = 0x152fecd8f70e5939ULL;
698 ctx->state.s64[4] = 0x67332667ffc00b31ULL;
699 ctx->state.s64[5] = 0x8eb44a8768581511ULL;
700 ctx->state.s64[6] = 0xdb0c2e0d64f98fa7ULL;
701 ctx->state.s64[7] = 0x47b5481dbefa4fa4ULL;
702 break;
703 case SHA512_MECH_INFO_TYPE:
704 case SHA512_HMAC_MECH_INFO_TYPE:
705 case SHA512_HMAC_GEN_MECH_INFO_TYPE:
706 ctx->state.s64[0] = 0x6a09e667f3bcc908ULL;
707 ctx->state.s64[1] = 0xbb67ae8584caa73bULL;
708 ctx->state.s64[2] = 0x3c6ef372fe94f82bULL;
709 ctx->state.s64[3] = 0xa54ff53a5f1d36f1ULL;
710 ctx->state.s64[4] = 0x510e527fade682d1ULL;
711 ctx->state.s64[5] = 0x9b05688c2b3e6c1fULL;
712 ctx->state.s64[6] = 0x1f83d9abfb41bd6bULL;
713 ctx->state.s64[7] = 0x5be0cd19137e2179ULL;
714 break;
715 #ifdef _KERNEL
716 default:
717 cmn_err(CE_PANIC,
718 "sha2_init: failed to find a supported algorithm: 0x%x",
719 (uint32_t)mech);
720
721 #endif /* _KERNEL */
722 }
723
724 ctx->algotype = mech;
725 ctx->count.c64[0] = ctx->count.c64[1] = 0;
726 }
727
728 #ifndef _KERNEL
729
730 #pragma inline(SHA256Init, SHA384Init, SHA512Init)
731 void
732 SHA256Init(SHA256_CTX *ctx)
733 {
734 SHA2Init(SHA256, ctx);
735 }
736
737 void
738 SHA384Init(SHA384_CTX *ctx)
739 {
740 SHA2Init(SHA384, ctx);
741 }
742
743 void
744 SHA512Init(SHA512_CTX *ctx)
745 {
746 SHA2Init(SHA512, ctx);
747 }
748
749 #endif /* _KERNEL */
750
751 /*
752 * SHA2Update()
753 *
754 * purpose: continues an sha2 digest operation, using the message block
755 * to update the context.
756 * input: SHA2_CTX * : the context to update
757 * void * : the message block
758 * size_t : the length of the message block, in bytes
759 * output: void
760 */
761
762 void
763 SHA2Update(SHA2_CTX *ctx, const void *inptr, size_t input_len)
764 {
765 uint32_t i, buf_index, buf_len, buf_limit;
766 const uint8_t *input = inptr;
767 uint32_t algotype = ctx->algotype;
768 #if defined(__amd64)
769 uint32_t block_count;
770 #endif /* !__amd64 */
771
772
773 /* check for noop */
774 if (input_len == 0)
775 return;
776
777 if (algotype <= SHA256_HMAC_GEN_MECH_INFO_TYPE) {
778 buf_limit = 64;
779
780 /* compute number of bytes mod 64 */
781 buf_index = (ctx->count.c32[1] >> 3) & 0x3F;
782
783 /* update number of bits */
784 if ((ctx->count.c32[1] += (input_len << 3)) < (input_len << 3))
785 ctx->count.c32[0]++;
786
787 ctx->count.c32[0] += (input_len >> 29);
788
789 } else {
790 buf_limit = 128;
791
792 /* compute number of bytes mod 128 */
793 buf_index = (ctx->count.c64[1] >> 3) & 0x7F;
794
795 /* update number of bits */
796 if ((ctx->count.c64[1] += (input_len << 3)) < (input_len << 3))
797 ctx->count.c64[0]++;
798
799 ctx->count.c64[0] += (input_len >> 29);
800 }
801
802 buf_len = buf_limit - buf_index;
803
804 /* transform as many times as possible */
805 i = 0;
806 if (input_len >= buf_len) {
807
808 /*
809 * general optimization:
810 *
811 * only do initial bcopy() and SHA2Transform() if
812 * buf_index != 0. if buf_index == 0, we're just
813 * wasting our time doing the bcopy() since there
814 * wasn't any data left over from a previous call to
815 * SHA2Update().
816 */
817 if (buf_index) {
818 bcopy(input, &ctx->buf_un.buf8[buf_index], buf_len);
819 if (algotype <= SHA256_HMAC_GEN_MECH_INFO_TYPE)
820 SHA256Transform(ctx, ctx->buf_un.buf8);
821 else
822 SHA512Transform(ctx, ctx->buf_un.buf8);
823
824 i = buf_len;
825 }
826
827 #if !defined(__amd64)
828 if (algotype <= SHA256_HMAC_GEN_MECH_INFO_TYPE) {
829 for (; i + buf_limit - 1 < input_len; i += buf_limit) {
830 SHA256Transform(ctx, &input[i]);
831 }
832 } else {
833 for (; i + buf_limit - 1 < input_len; i += buf_limit) {
834 SHA512Transform(ctx, &input[i]);
835 }
836 }
837
838 #else
839 if (algotype <= SHA256_HMAC_GEN_MECH_INFO_TYPE) {
840 block_count = (input_len - i) >> 6;
841 if (block_count > 0) {
842 SHA256TransformBlocks(ctx, &input[i],
843 block_count);
844 i += block_count << 6;
845 }
846 } else {
847 block_count = (input_len - i) >> 7;
848 if (block_count > 0) {
849 SHA512TransformBlocks(ctx, &input[i],
850 block_count);
851 i += block_count << 7;
852 }
853 }
854 #endif /* !__amd64 */
855
856 /*
857 * general optimization:
858 *
859 * if i and input_len are the same, return now instead
860 * of calling bcopy(), since the bcopy() in this case
861 * will be an expensive noop.
862 */
863
864 if (input_len == i)
865 return;
866
867 buf_index = 0;
868 }
869
870 /* buffer remaining input */
871 bcopy(&input[i], &ctx->buf_un.buf8[buf_index], input_len - i);
872 }
873
874
875 /*
876 * SHA2Final()
877 *
878 * purpose: ends an sha2 digest operation, finalizing the message digest and
879 * zeroing the context.
880 * input: uchar_t * : a buffer to store the digest
881 * : The function actually uses void* because many
882 * : callers pass things other than uchar_t here.
883 * SHA2_CTX * : the context to finalize, save, and zero
884 * output: void
885 */
886
887 void
888 SHA2Final(void *digest, SHA2_CTX *ctx)
889 {
890 uint8_t bitcount_be[sizeof (ctx->count.c32)];
891 uint8_t bitcount_be64[sizeof (ctx->count.c64)];
892 uint32_t index;
893 uint32_t algotype = ctx->algotype;
894
895 if (algotype <= SHA256_HMAC_GEN_MECH_INFO_TYPE) {
896 index = (ctx->count.c32[1] >> 3) & 0x3f;
897 Encode(bitcount_be, ctx->count.c32, sizeof (bitcount_be));
898 SHA2Update(ctx, PADDING, ((index < 56) ? 56 : 120) - index);
899 SHA2Update(ctx, bitcount_be, sizeof (bitcount_be));
900 Encode(digest, ctx->state.s32, sizeof (ctx->state.s32));
901
902 } else {
903 index = (ctx->count.c64[1] >> 3) & 0x7f;
904 Encode64(bitcount_be64, ctx->count.c64,
905 sizeof (bitcount_be64));
906 SHA2Update(ctx, PADDING, ((index < 112) ? 112 : 240) - index);
907 SHA2Update(ctx, bitcount_be64, sizeof (bitcount_be64));
908 if (algotype <= SHA384_HMAC_GEN_MECH_INFO_TYPE) {
909 ctx->state.s64[6] = ctx->state.s64[7] = 0;
910 Encode64(digest, ctx->state.s64,
911 sizeof (uint64_t) * 6);
912 } else
913 Encode64(digest, ctx->state.s64,
914 sizeof (ctx->state.s64));
915 }
916
917 /* zeroize sensitive information */
918 bzero(ctx, sizeof (*ctx));
919 }