Mercurial > hg > nginx
annotate src/mail/ngx_mail_imap_module.c @ 7361:c09c7d47acb9
SSL: logging level of "no suitable signature algorithm".
The "no suitable signature algorithm" errors are reported by OpenSSL 1.1.1
when using TLSv1.3 if there are no shared signature algorithms. In
particular, this can happen if the client limits available signature
algorithms to something we don't have a certificate for, or to an empty
list. For example, the following command:
openssl s_client -connect 127.0.0.1:8443 -sigalgs rsa_pkcs1_sha1
will always result in the "no suitable signature algorithm" error
as the "rsa_pkcs1_sha1" algorithm refers solely to signatures which
appear in certificates and not defined for use in TLS 1.3 handshake
messages.
The SSL_R_NO_COMMON_SIGNATURE_ALGORITHMS error is what BoringSSL returns
in the same situation.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Tue, 25 Sep 2018 14:00:04 +0300 |
parents | bcb107bb89cd |
children | dc955d274130 |
rev | line source |
---|---|
521 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
521 | 5 */ |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_event.h> | |
1136 | 11 #include <ngx_mail.h> |
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12 #include <ngx_mail_imap_module.h> |
521 | 13 |
14 | |
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15 static void *ngx_mail_imap_create_srv_conf(ngx_conf_t *cf); |
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16 static char *ngx_mail_imap_merge_srv_conf(ngx_conf_t *cf, void *parent, |
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17 void *child); |
521 | 18 |
19 | |
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20 static ngx_str_t ngx_mail_imap_default_capabilities[] = { |
527 | 21 ngx_string("IMAP4"), |
22 ngx_string("IMAP4rev1"), | |
23 ngx_string("UIDPLUS"), | |
24 ngx_null_string | |
25 }; | |
26 | |
27 | |
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28 static ngx_conf_bitmask_t ngx_mail_imap_auth_methods[] = { |
1323 | 29 { ngx_string("plain"), NGX_MAIL_AUTH_PLAIN_ENABLED }, |
30 { ngx_string("login"), NGX_MAIL_AUTH_LOGIN_ENABLED }, | |
31 { ngx_string("cram-md5"), NGX_MAIL_AUTH_CRAM_MD5_ENABLED }, | |
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32 { ngx_string("external"), NGX_MAIL_AUTH_EXTERNAL_ENABLED }, |
1323 | 33 { ngx_null_string, 0 } |
34 }; | |
35 | |
36 | |
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37 static ngx_str_t ngx_mail_imap_auth_methods_names[] = { |
1323 | 38 ngx_string("AUTH=PLAIN"), |
39 ngx_string("AUTH=LOGIN"), | |
40 ngx_null_string, /* APOP */ | |
2309 | 41 ngx_string("AUTH=CRAM-MD5"), |
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42 ngx_string("AUTH=EXTERNAL"), |
2309 | 43 ngx_null_string /* NONE */ |
1323 | 44 }; |
45 | |
46 | |
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47 static ngx_mail_protocol_t ngx_mail_imap_protocol = { |
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48 ngx_string("imap"), |
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49 { 143, 993, 0, 0 }, |
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50 NGX_MAIL_IMAP_PROTOCOL, |
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51 |
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52 ngx_mail_imap_init_session, |
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53 ngx_mail_imap_init_protocol, |
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54 ngx_mail_imap_parse_command, |
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55 ngx_mail_imap_auth_state, |
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56 |
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57 ngx_string("* BAD internal server error" CRLF), |
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58 ngx_string("* BYE SSL certificate error" CRLF), |
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59 ngx_string("* BYE No required SSL certificate" CRLF) |
1136 | 60 }; |
61 | |
62 | |
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63 static ngx_command_t ngx_mail_imap_commands[] = { |
521 | 64 |
65 { ngx_string("imap_client_buffer"), | |
1136 | 66 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
521 | 67 ngx_conf_set_size_slot, |
1136 | 68 NGX_MAIL_SRV_CONF_OFFSET, |
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69 offsetof(ngx_mail_imap_srv_conf_t, client_buffer_size), |
527 | 70 NULL }, |
71 | |
72 { ngx_string("imap_capabilities"), | |
1136 | 73 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, |
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74 ngx_mail_capabilities, |
1136 | 75 NGX_MAIL_SRV_CONF_OFFSET, |
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76 offsetof(ngx_mail_imap_srv_conf_t, capabilities), |
800 | 77 NULL }, |
78 | |
1323 | 79 { ngx_string("imap_auth"), |
80 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, | |
81 ngx_conf_set_bitmask_slot, | |
82 NGX_MAIL_SRV_CONF_OFFSET, | |
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83 offsetof(ngx_mail_imap_srv_conf_t, auth_methods), |
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84 &ngx_mail_imap_auth_methods }, |
800 | 85 |
521 | 86 ngx_null_command |
87 }; | |
88 | |
89 | |
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90 static ngx_mail_module_t ngx_mail_imap_module_ctx = { |
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91 &ngx_mail_imap_protocol, /* protocol */ |
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92 |
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93 NULL, /* create main configuration */ |
521 | 94 NULL, /* init main configuration */ |
95 | |
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96 ngx_mail_imap_create_srv_conf, /* create server configuration */ |
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97 ngx_mail_imap_merge_srv_conf /* merge server configuration */ |
521 | 98 }; |
99 | |
100 | |
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101 ngx_module_t ngx_mail_imap_module = { |
521 | 102 NGX_MODULE_V1, |
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103 &ngx_mail_imap_module_ctx, /* module context */ |
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104 ngx_mail_imap_commands, /* module directives */ |
1136 | 105 NGX_MAIL_MODULE, /* module type */ |
541 | 106 NULL, /* init master */ |
521 | 107 NULL, /* init module */ |
541 | 108 NULL, /* init process */ |
109 NULL, /* init thread */ | |
110 NULL, /* exit thread */ | |
111 NULL, /* exit process */ | |
112 NULL, /* exit master */ | |
113 NGX_MODULE_V1_PADDING | |
521 | 114 }; |
115 | |
116 | |
117 static void * | |
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118 ngx_mail_imap_create_srv_conf(ngx_conf_t *cf) |
577 | 119 { |
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120 ngx_mail_imap_srv_conf_t *iscf; |
641 | 121 |
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122 iscf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_imap_srv_conf_t)); |
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123 if (iscf == NULL) { |
527 | 124 return NULL; |
521 | 125 } |
126 | |
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127 iscf->client_buffer_size = NGX_CONF_UNSET_SIZE; |
521 | 128 |
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129 if (ngx_array_init(&iscf->capabilities, cf->pool, 4, sizeof(ngx_str_t)) |
1136 | 130 != NGX_OK) |
131 { | |
132 return NULL; | |
133 } | |
134 | |
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135 return iscf; |
521 | 136 } |
137 | |
138 | |
139 static char * | |
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140 ngx_mail_imap_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) |
521 | 141 { |
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142 ngx_mail_imap_srv_conf_t *prev = parent; |
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143 ngx_mail_imap_srv_conf_t *conf = child; |
521 | 144 |
1322 | 145 u_char *p, *auth; |
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146 size_t size; |
527 | 147 ngx_str_t *c, *d; |
1136 | 148 ngx_uint_t i, m; |
527 | 149 |
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150 ngx_conf_merge_size_value(conf->client_buffer_size, |
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151 prev->client_buffer_size, |
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152 (size_t) ngx_pagesize); |
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153 |
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154 ngx_conf_merge_bitmask_value(conf->auth_methods, |
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155 prev->auth_methods, |
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156 (NGX_CONF_BITMASK_SET |
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157 |NGX_MAIL_AUTH_PLAIN_ENABLED)); |
1323 | 158 |
800 | 159 |
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160 if (conf->capabilities.nelts == 0) { |
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161 conf->capabilities = prev->capabilities; |
527 | 162 } |
163 | |
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164 if (conf->capabilities.nelts == 0) { |
527 | 165 |
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166 for (d = ngx_mail_imap_default_capabilities; d->len; d++) { |
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167 c = ngx_array_push(&conf->capabilities); |
527 | 168 if (c == NULL) { |
169 return NGX_CONF_ERROR; | |
170 } | |
171 | |
172 *c = *d; | |
173 } | |
174 } | |
175 | |
1136 | 176 size = sizeof("* CAPABILITY" CRLF) - 1; |
527 | 177 |
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178 c = conf->capabilities.elts; |
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179 for (i = 0; i < conf->capabilities.nelts; i++) { |
527 | 180 size += 1 + c[i].len; |
181 } | |
182 | |
1323 | 183 for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; |
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184 m <= NGX_MAIL_AUTH_EXTERNAL_ENABLED; |
1323 | 185 m <<= 1, i++) |
186 { | |
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187 if (m & conf->auth_methods) { |
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188 size += 1 + ngx_mail_imap_auth_methods_names[i].len; |
1323 | 189 } |
190 } | |
191 | |
2049 | 192 p = ngx_pnalloc(cf->pool, size); |
583 | 193 if (p == NULL) { |
194 return NGX_CONF_ERROR; | |
195 } | |
196 | |
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197 conf->capability.len = size; |
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198 conf->capability.data = p; |
583 | 199 |
200 p = ngx_cpymem(p, "* CAPABILITY", sizeof("* CAPABILITY") - 1); | |
201 | |
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202 for (i = 0; i < conf->capabilities.nelts; i++) { |
583 | 203 *p++ = ' '; |
204 p = ngx_cpymem(p, c[i].data, c[i].len); | |
205 } | |
206 | |
1323 | 207 auth = p; |
208 | |
209 for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; | |
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210 m <= NGX_MAIL_AUTH_EXTERNAL_ENABLED; |
1323 | 211 m <<= 1, i++) |
212 { | |
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213 if (m & conf->auth_methods) { |
1323 | 214 *p++ = ' '; |
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215 p = ngx_cpymem(p, ngx_mail_imap_auth_methods_names[i].data, |
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216 ngx_mail_imap_auth_methods_names[i].len); |
1323 | 217 } |
218 } | |
219 | |
583 | 220 *p++ = CR; *p = LF; |
221 | |
222 | |
223 size += sizeof(" STARTTLS") - 1; | |
224 | |
2049 | 225 p = ngx_pnalloc(cf->pool, size); |
583 | 226 if (p == NULL) { |
527 | 227 return NGX_CONF_ERROR; |
228 } | |
229 | |
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230 conf->starttls_capability.len = size; |
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231 conf->starttls_capability.data = p; |
527 | 232 |
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233 p = ngx_cpymem(p, conf->capability.data, |
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234 conf->capability.len - (sizeof(CRLF) - 1)); |
583 | 235 p = ngx_cpymem(p, " STARTTLS", sizeof(" STARTTLS") - 1); |
236 *p++ = CR; *p = LF; | |
237 | |
238 | |
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239 size = (auth - conf->capability.data) + sizeof(CRLF) - 1 |
1323 | 240 + sizeof(" STARTTLS LOGINDISABLED") - 1; |
583 | 241 |
2049 | 242 p = ngx_pnalloc(cf->pool, size); |
583 | 243 if (p == NULL) { |
244 return NGX_CONF_ERROR; | |
527 | 245 } |
246 | |
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247 conf->starttls_only_capability.len = size; |
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248 conf->starttls_only_capability.data = p; |
527 | 249 |
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250 p = ngx_cpymem(p, conf->capability.data, |
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251 auth - conf->capability.data); |
1323 | 252 p = ngx_cpymem(p, " STARTTLS LOGINDISABLED", |
253 sizeof(" STARTTLS LOGINDISABLED") - 1); | |
583 | 254 *p++ = CR; *p = LF; |
255 | |
521 | 256 return NGX_CONF_OK; |
257 } |