Mercurial > hg > nginx-quic
annotate src/core/ngx_md5.c @ 8456:c72d8839f427
Mail: fixed SMTP pipelining to send the response immediately.
Previously, if there were some pipelined SMTP data in the buffer when
a proxied connection with the backend was established, nginx called
ngx_mail_proxy_handler() to send these data, and not tried to send the
response to the last command. In most cases, this response was later sent
along with the response to the pipelined command, but if for some reason
client decides to wait for the response before finishing the next command
this might result in a connection hang.
Fix is to always call ngx_mail_proxy_handler() to send the response, and
additionally post an event to send the pipelined data if needed.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Wed, 19 May 2021 03:13:12 +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 } |