Mercurial > hg > nginx
annotate src/core/ngx_md5.c @ 8338:0f9e9786b90d quic
Added primitive flow control mechanisms.
+ MAX_STREAM_DATA frame is sent when recv() is performed on stream
The new value is a sum of total bytes received by stream + free
space in a buffer;
The sending of MAX_STREM_DATA frame in response to STREAM_DATA_BLOCKED
frame is adjusted to follow the same logic as above.
+ MAX_DATA frame is sent when total amount of received data is 2x
of current limit. The limit is doubled.
+ Default values of transport parameters are adjusted to more meaningful
values:
initial stream limits are set to quic buffer size instead of
unrealistically small 255.
initial max data is decreased to 16 buffer sizes, in an assumption that
this is enough for a relatively short connection, instead of randomly
chosen big number.
All this allows to initiate a stable flow of streams that does not block
on stream/connection limits (tested with FF 77.0a1 and 100K requests)
author | Vladimir Homutov <vl@nginx.com> |
---|---|
date | Wed, 15 Apr 2020 18:54:03 +0300 |
parents | 9eefb38f0005 |
children |
rev | line source |
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3895 | 1 |
2 /* | |
3 * An internal implementation, based on Alexander Peslyak's | |
4 * public domain implementation: | |
5 * http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5 | |
6 */ | |
7 | |
8 | |
9 #include <ngx_config.h> | |
10 #include <ngx_core.h> | |
11 #include <ngx_md5.h> | |
12 | |
13 | |
14 static const u_char *ngx_md5_body(ngx_md5_t *ctx, const u_char *data, | |
15 size_t size); | |
16 | |
17 | |
18 void | |
19 ngx_md5_init(ngx_md5_t *ctx) | |
20 { | |
21 ctx->a = 0x67452301; | |
22 ctx->b = 0xefcdab89; | |
23 ctx->c = 0x98badcfe; | |
24 ctx->d = 0x10325476; | |
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25 |
3895 | 26 ctx->bytes = 0; |
27 } | |
28 | |
29 | |
30 void | |
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31 ngx_md5_update(ngx_md5_t *ctx, const void *data, size_t size) |
3895 | 32 { |
33 size_t used, free; | |
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34 |
3941 | 35 used = (size_t) (ctx->bytes & 0x3f); |
3895 | 36 ctx->bytes += size; |
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37 |
3895 | 38 if (used) { |
39 free = 64 - used; | |
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40 |
3895 | 41 if (size < free) { |
42 ngx_memcpy(&ctx->buffer[used], data, size); | |
43 return; | |
44 } | |
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45 |
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46 ngx_memcpy(&ctx->buffer[used], data, free); |
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47 data = (u_char *) data + free; |
3895 | 48 size -= free; |
49 (void) ngx_md5_body(ctx, ctx->buffer, 64); | |
50 } | |
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51 |
3895 | 52 if (size >= 64) { |
53 data = ngx_md5_body(ctx, data, size & ~(size_t) 0x3f); | |
54 size &= 0x3f; | |
55 } | |
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56 |
3895 | 57 ngx_memcpy(ctx->buffer, data, size); |
58 } | |
59 | |
60 | |
61 void | |
62 ngx_md5_final(u_char result[16], ngx_md5_t *ctx) | |
63 { | |
64 size_t used, free; | |
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65 |
3941 | 66 used = (size_t) (ctx->bytes & 0x3f); |
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67 |
3895 | 68 ctx->buffer[used++] = 0x80; |
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69 |
3895 | 70 free = 64 - used; |
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71 |
3895 | 72 if (free < 8) { |
73 ngx_memzero(&ctx->buffer[used], free); | |
74 (void) ngx_md5_body(ctx, ctx->buffer, 64); | |
75 used = 0; | |
76 free = 64; | |
77 } | |
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78 |
3895 | 79 ngx_memzero(&ctx->buffer[used], free - 8); |
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80 |
3895 | 81 ctx->bytes <<= 3; |
3941 | 82 ctx->buffer[56] = (u_char) ctx->bytes; |
83 ctx->buffer[57] = (u_char) (ctx->bytes >> 8); | |
84 ctx->buffer[58] = (u_char) (ctx->bytes >> 16); | |
85 ctx->buffer[59] = (u_char) (ctx->bytes >> 24); | |
86 ctx->buffer[60] = (u_char) (ctx->bytes >> 32); | |
87 ctx->buffer[61] = (u_char) (ctx->bytes >> 40); | |
88 ctx->buffer[62] = (u_char) (ctx->bytes >> 48); | |
89 ctx->buffer[63] = (u_char) (ctx->bytes >> 56); | |
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90 |
3895 | 91 (void) ngx_md5_body(ctx, ctx->buffer, 64); |
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92 |
3941 | 93 result[0] = (u_char) ctx->a; |
94 result[1] = (u_char) (ctx->a >> 8); | |
95 result[2] = (u_char) (ctx->a >> 16); | |
96 result[3] = (u_char) (ctx->a >> 24); | |
97 result[4] = (u_char) ctx->b; | |
98 result[5] = (u_char) (ctx->b >> 8); | |
99 result[6] = (u_char) (ctx->b >> 16); | |
100 result[7] = (u_char) (ctx->b >> 24); | |
101 result[8] = (u_char) ctx->c; | |
102 result[9] = (u_char) (ctx->c >> 8); | |
103 result[10] = (u_char) (ctx->c >> 16); | |
104 result[11] = (u_char) (ctx->c >> 24); | |
105 result[12] = (u_char) ctx->d; | |
106 result[13] = (u_char) (ctx->d >> 8); | |
107 result[14] = (u_char) (ctx->d >> 16); | |
108 result[15] = (u_char) (ctx->d >> 24); | |
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109 |
3895 | 110 ngx_memzero(ctx, sizeof(*ctx)); |
111 } | |
112 | |
113 | |
114 /* | |
115 * The basic MD5 functions. | |
116 * | |
117 * F and G are optimized compared to their RFC 1321 definitions for | |
118 * architectures that lack an AND-NOT instruction, just like in | |
119 * Colin Plumb's implementation. | |
120 */ | |
121 | |
122 #define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z)))) | |
123 #define G(x, y, z) ((y) ^ ((z) & ((x) ^ (y)))) | |
124 #define H(x, y, z) ((x) ^ (y) ^ (z)) | |
125 #define I(x, y, z) ((y) ^ ((x) | ~(z))) | |
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126 |
3895 | 127 /* |
128 * The MD5 transformation for all four rounds. | |
129 */ | |
130 | |
131 #define STEP(f, a, b, c, d, x, t, s) \ | |
132 (a) += f((b), (c), (d)) + (x) + (t); \ | |
133 (a) = (((a) << (s)) | (((a) & 0xffffffff) >> (32 - (s)))); \ | |
134 (a) += (b) | |
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135 |
3895 | 136 /* |
137 * SET() reads 4 input bytes in little-endian byte order and stores them | |
138 * in a properly aligned word in host byte order. | |
139 * | |
140 * The check for little-endian architectures that tolerate unaligned | |
141 * memory accesses is just an optimization. Nothing will break if it | |
142 * does not work. | |
143 */ | |
144 | |
145 #if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED) | |
146 | |
147 #define SET(n) (*(uint32_t *) &p[n * 4]) | |
148 #define GET(n) (*(uint32_t *) &p[n * 4]) | |
149 | |
150 #else | |
151 | |
152 #define SET(n) \ | |
153 (block[n] = \ | |
154 (uint32_t) p[n * 4] | \ | |
155 ((uint32_t) p[n * 4 + 1] << 8) | \ | |
156 ((uint32_t) p[n * 4 + 2] << 16) | \ | |
157 ((uint32_t) p[n * 4 + 3] << 24)) | |
158 | |
159 #define GET(n) block[n] | |
160 | |
161 #endif | |
162 | |
163 | |
164 /* | |
165 * This processes one or more 64-byte data blocks, but does not update | |
166 * the bit counters. There are no alignment requirements. | |
167 */ | |
168 | |
169 static const u_char * | |
170 ngx_md5_body(ngx_md5_t *ctx, const u_char *data, size_t size) | |
171 { | |
172 uint32_t a, b, c, d; | |
173 uint32_t saved_a, saved_b, saved_c, saved_d; | |
174 const u_char *p; | |
175 #if !(NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED) | |
176 uint32_t block[16]; | |
177 #endif | |
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178 |
3895 | 179 p = data; |
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180 |
3895 | 181 a = ctx->a; |
182 b = ctx->b; | |
183 c = ctx->c; | |
184 d = ctx->d; | |
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185 |
3895 | 186 do { |
187 saved_a = a; | |
188 saved_b = b; | |
189 saved_c = c; | |
190 saved_d = d; | |
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191 |
3895 | 192 /* Round 1 */ |
193 | |
194 STEP(F, a, b, c, d, SET(0), 0xd76aa478, 7); | |
195 STEP(F, d, a, b, c, SET(1), 0xe8c7b756, 12); | |
196 STEP(F, c, d, a, b, SET(2), 0x242070db, 17); | |
197 STEP(F, b, c, d, a, SET(3), 0xc1bdceee, 22); | |
198 STEP(F, a, b, c, d, SET(4), 0xf57c0faf, 7); | |
199 STEP(F, d, a, b, c, SET(5), 0x4787c62a, 12); | |
200 STEP(F, c, d, a, b, SET(6), 0xa8304613, 17); | |
201 STEP(F, b, c, d, a, SET(7), 0xfd469501, 22); | |
202 STEP(F, a, b, c, d, SET(8), 0x698098d8, 7); | |
203 STEP(F, d, a, b, c, SET(9), 0x8b44f7af, 12); | |
204 STEP(F, c, d, a, b, SET(10), 0xffff5bb1, 17); | |
205 STEP(F, b, c, d, a, SET(11), 0x895cd7be, 22); | |
206 STEP(F, a, b, c, d, SET(12), 0x6b901122, 7); | |
207 STEP(F, d, a, b, c, SET(13), 0xfd987193, 12); | |
208 STEP(F, c, d, a, b, SET(14), 0xa679438e, 17); | |
209 STEP(F, b, c, d, a, SET(15), 0x49b40821, 22); | |
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210 |
3895 | 211 /* Round 2 */ |
212 | |
213 STEP(G, a, b, c, d, GET(1), 0xf61e2562, 5); | |
214 STEP(G, d, a, b, c, GET(6), 0xc040b340, 9); | |
215 STEP(G, c, d, a, b, GET(11), 0x265e5a51, 14); | |
216 STEP(G, b, c, d, a, GET(0), 0xe9b6c7aa, 20); | |
217 STEP(G, a, b, c, d, GET(5), 0xd62f105d, 5); | |
218 STEP(G, d, a, b, c, GET(10), 0x02441453, 9); | |
219 STEP(G, c, d, a, b, GET(15), 0xd8a1e681, 14); | |
220 STEP(G, b, c, d, a, GET(4), 0xe7d3fbc8, 20); | |
221 STEP(G, a, b, c, d, GET(9), 0x21e1cde6, 5); | |
222 STEP(G, d, a, b, c, GET(14), 0xc33707d6, 9); | |
223 STEP(G, c, d, a, b, GET(3), 0xf4d50d87, 14); | |
224 STEP(G, b, c, d, a, GET(8), 0x455a14ed, 20); | |
225 STEP(G, a, b, c, d, GET(13), 0xa9e3e905, 5); | |
226 STEP(G, d, a, b, c, GET(2), 0xfcefa3f8, 9); | |
227 STEP(G, c, d, a, b, GET(7), 0x676f02d9, 14); | |
228 STEP(G, b, c, d, a, GET(12), 0x8d2a4c8a, 20); | |
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229 |
3895 | 230 /* Round 3 */ |
231 | |
232 STEP(H, a, b, c, d, GET(5), 0xfffa3942, 4); | |
233 STEP(H, d, a, b, c, GET(8), 0x8771f681, 11); | |
234 STEP(H, c, d, a, b, GET(11), 0x6d9d6122, 16); | |
235 STEP(H, b, c, d, a, GET(14), 0xfde5380c, 23); | |
236 STEP(H, a, b, c, d, GET(1), 0xa4beea44, 4); | |
237 STEP(H, d, a, b, c, GET(4), 0x4bdecfa9, 11); | |
238 STEP(H, c, d, a, b, GET(7), 0xf6bb4b60, 16); | |
239 STEP(H, b, c, d, a, GET(10), 0xbebfbc70, 23); | |
240 STEP(H, a, b, c, d, GET(13), 0x289b7ec6, 4); | |
241 STEP(H, d, a, b, c, GET(0), 0xeaa127fa, 11); | |
242 STEP(H, c, d, a, b, GET(3), 0xd4ef3085, 16); | |
243 STEP(H, b, c, d, a, GET(6), 0x04881d05, 23); | |
244 STEP(H, a, b, c, d, GET(9), 0xd9d4d039, 4); | |
245 STEP(H, d, a, b, c, GET(12), 0xe6db99e5, 11); | |
246 STEP(H, c, d, a, b, GET(15), 0x1fa27cf8, 16); | |
247 STEP(H, b, c, d, a, GET(2), 0xc4ac5665, 23); | |
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248 |
3895 | 249 /* Round 4 */ |
250 | |
251 STEP(I, a, b, c, d, GET(0), 0xf4292244, 6); | |
252 STEP(I, d, a, b, c, GET(7), 0x432aff97, 10); | |
253 STEP(I, c, d, a, b, GET(14), 0xab9423a7, 15); | |
254 STEP(I, b, c, d, a, GET(5), 0xfc93a039, 21); | |
255 STEP(I, a, b, c, d, GET(12), 0x655b59c3, 6); | |
256 STEP(I, d, a, b, c, GET(3), 0x8f0ccc92, 10); | |
257 STEP(I, c, d, a, b, GET(10), 0xffeff47d, 15); | |
258 STEP(I, b, c, d, a, GET(1), 0x85845dd1, 21); | |
259 STEP(I, a, b, c, d, GET(8), 0x6fa87e4f, 6); | |
260 STEP(I, d, a, b, c, GET(15), 0xfe2ce6e0, 10); | |
261 STEP(I, c, d, a, b, GET(6), 0xa3014314, 15); | |
262 STEP(I, b, c, d, a, GET(13), 0x4e0811a1, 21); | |
263 STEP(I, a, b, c, d, GET(4), 0xf7537e82, 6); | |
264 STEP(I, d, a, b, c, GET(11), 0xbd3af235, 10); | |
265 STEP(I, c, d, a, b, GET(2), 0x2ad7d2bb, 15); | |
266 STEP(I, b, c, d, a, GET(9), 0xeb86d391, 21); | |
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267 |
3895 | 268 a += saved_a; |
269 b += saved_b; | |
270 c += saved_c; | |
271 d += saved_d; | |
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272 |
3895 | 273 p += 64; |
274 | |
275 } while (size -= 64); | |
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276 |
3895 | 277 ctx->a = a; |
278 ctx->b = b; | |
279 ctx->c = c; | |
280 ctx->d = d; | |
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281 |
3895 | 282 return p; |
283 } |