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annotate src/mail/ngx_mail_pop3_module.c @ 6773:73b451d304c0

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Mail: extensible auth methods in pop3 module.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 18 Oct 2016 19:38:46 +0300
parents ec01b1d1fff1
children bcb107bb89cd
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 * Copyright (C) Nginx, Inc.
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5 */
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_event.h>
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11 #include <ngx_mail.h>
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12 #include <ngx_mail_pop3_module.h>
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15 static void *ngx_mail_pop3_create_srv_conf(ngx_conf_t *cf);
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16 static char *ngx_mail_pop3_merge_srv_conf(ngx_conf_t *cf, void *parent,
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17 void *child);
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20 static ngx_str_t ngx_mail_pop3_default_capabilities[] = {
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21 ngx_string("TOP"),
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22 ngx_string("USER"),
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23 ngx_string("UIDL"),
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24 ngx_null_string
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25 };
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28 static ngx_conf_bitmask_t ngx_mail_pop3_auth_methods[] = {
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29 { ngx_string("plain"), NGX_MAIL_AUTH_PLAIN_ENABLED },
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30 { ngx_string("apop"), NGX_MAIL_AUTH_APOP_ENABLED },
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31 { ngx_string("cram-md5"), NGX_MAIL_AUTH_CRAM_MD5_ENABLED },
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32 { ngx_null_string, 0 }
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33 };
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34
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35
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36 static ngx_str_t ngx_mail_pop3_auth_methods_names[] = {
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37 ngx_string("PLAIN"),
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38 ngx_string("LOGIN"),
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39 ngx_null_string, /* APOP */
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40 ngx_string("CRAM-MD5"),
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41 ngx_null_string /* NONE */
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42 };
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43
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44
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45 static ngx_mail_protocol_t ngx_mail_pop3_protocol = {
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46 ngx_string("pop3"),
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47 { 110, 995, 0, 0 },
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48 NGX_MAIL_POP3_PROTOCOL,
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49
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50 ngx_mail_pop3_init_session,
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51 ngx_mail_pop3_init_protocol,
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52 ngx_mail_pop3_parse_command,
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53 ngx_mail_pop3_auth_state,
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54
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55 ngx_string("-ERR internal server error" CRLF),
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56 ngx_string("-ERR SSL certificate error" CRLF),
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57 ngx_string("-ERR No required SSL certificate" CRLF)
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58 };
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60
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61 static ngx_command_t ngx_mail_pop3_commands[] = {
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62
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63 { ngx_string("pop3_capabilities"),
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64 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
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65 ngx_mail_capabilities,
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66 NGX_MAIL_SRV_CONF_OFFSET,
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67 offsetof(ngx_mail_pop3_srv_conf_t, capabilities),
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68 NULL },
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69
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70 { ngx_string("pop3_auth"),
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71 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
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72 ngx_conf_set_bitmask_slot,
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73 NGX_MAIL_SRV_CONF_OFFSET,
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74 offsetof(ngx_mail_pop3_srv_conf_t, auth_methods),
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75 &ngx_mail_pop3_auth_methods },
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76
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77 ngx_null_command
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78 };
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80
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81 static ngx_mail_module_t ngx_mail_pop3_module_ctx = {
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82 &ngx_mail_pop3_protocol, /* protocol */
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84 NULL, /* create main configuration */
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85 NULL, /* init main configuration */
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86
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87 ngx_mail_pop3_create_srv_conf, /* create server configuration */
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88 ngx_mail_pop3_merge_srv_conf /* merge server configuration */
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89 };
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91
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92 ngx_module_t ngx_mail_pop3_module = {
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93 NGX_MODULE_V1,
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94 &ngx_mail_pop3_module_ctx, /* module context */
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95 ngx_mail_pop3_commands, /* module directives */
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96 NGX_MAIL_MODULE, /* module type */
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97 NULL, /* init master */
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98 NULL, /* init module */
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99 NULL, /* init process */
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100 NULL, /* init thread */
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101 NULL, /* exit thread */
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102 NULL, /* exit process */
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103 NULL, /* exit master */
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104 NGX_MODULE_V1_PADDING
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105 };
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106
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107
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108 static void *
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109 ngx_mail_pop3_create_srv_conf(ngx_conf_t *cf)
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110 {
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111 ngx_mail_pop3_srv_conf_t *pscf;
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112
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113 pscf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_pop3_srv_conf_t));
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114 if (pscf == NULL) {
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115 return NULL;
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116 }
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117
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118 if (ngx_array_init(&pscf->capabilities, cf->pool, 4, sizeof(ngx_str_t))
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119 != NGX_OK)
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120 {
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121 return NULL;
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122 }
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123
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124 return pscf;
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parents:
diff changeset
125 }
6f00349b98e5 nginx-0.1.35-RELEASE import
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parents:
diff changeset
126
6f00349b98e5 nginx-0.1.35-RELEASE import
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parents:
diff changeset
127
6f00349b98e5 nginx-0.1.35-RELEASE import
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parents:
diff changeset
128 static char *
1487
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parents: 1481
diff changeset
129 ngx_mail_pop3_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
521
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parents:
diff changeset
130 {
1487
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parents: 1481
diff changeset
131 ngx_mail_pop3_srv_conf_t *prev = parent;
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parents: 1481
diff changeset
132 ngx_mail_pop3_srv_conf_t *conf = child;
521
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parents:
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133
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diff changeset
134 u_char *p;
1136
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135 size_t size, stls_only_size;
527
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diff changeset
136 ngx_str_t *c, *d;
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137 ngx_uint_t i, m;
1136
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138
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diff changeset
139 ngx_conf_merge_bitmask_value(conf->auth_methods,
f69493e8faab ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
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parents: 1481
diff changeset
140 prev->auth_methods,
f69493e8faab ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
Igor Sysoev <igor@sysoev.ru>
parents: 1481
diff changeset
141 (NGX_CONF_BITMASK_SET
f69493e8faab ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
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parents: 1481
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142 |NGX_MAIL_AUTH_PLAIN_ENABLED));
800
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parents: 663
diff changeset
143
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144 if (conf->auth_methods & NGX_MAIL_AUTH_PLAIN_ENABLED) {
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145 conf->auth_methods |= NGX_MAIL_AUTH_LOGIN_ENABLED;
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146 }
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diff changeset
147
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diff changeset
148 if (conf->capabilities.nelts == 0) {
f69493e8faab ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
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parents: 1481
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149 conf->capabilities = prev->capabilities;
800
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150 }
Igor Sysoev <igor@sysoev.ru>
parents: 663
diff changeset
151
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diff changeset
152 if (conf->capabilities.nelts == 0) {
527
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diff changeset
153
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diff changeset
154 for (d = ngx_mail_pop3_default_capabilities; d->len; d++) {
f69493e8faab ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
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parents: 1481
diff changeset
155 c = ngx_array_push(&conf->capabilities);
527
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diff changeset
156 if (c == NULL) {
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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diff changeset
157 return NGX_CONF_ERROR;
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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parents: 523
diff changeset
158 }
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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parents: 523
diff changeset
159
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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parents: 523
diff changeset
160 *c = *d;
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parents: 523
diff changeset
161 }
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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parents: 523
diff changeset
162 }
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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parents: 523
diff changeset
163
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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parents: 523
diff changeset
164 size = sizeof("+OK Capability list follows" CRLF) - 1
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diff changeset
165 + sizeof("." CRLF) - 1;
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diff changeset
166
1136
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167 stls_only_size = size + sizeof("STLS" CRLF) - 1;
68f30ab68bb7 Many changes:
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parents: 906
diff changeset
168
1487
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diff changeset
169 c = conf->capabilities.elts;
f69493e8faab ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
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parents: 1481
diff changeset
170 for (i = 0; i < conf->capabilities.nelts; i++) {
527
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diff changeset
171 size += c[i].len + sizeof(CRLF) - 1;
1136
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diff changeset
172
68f30ab68bb7 Many changes:
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diff changeset
173 if (ngx_strcasecmp(c[i].data, (u_char *) "USER") == 0) {
68f30ab68bb7 Many changes:
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parents: 906
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174 continue;
68f30ab68bb7 Many changes:
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parents: 906
diff changeset
175 }
68f30ab68bb7 Many changes:
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parents: 906
diff changeset
176
68f30ab68bb7 Many changes:
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diff changeset
177 stls_only_size += c[i].len + sizeof(CRLF) - 1;
527
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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parents: 523
diff changeset
178 }
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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parents: 523
diff changeset
179
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diff changeset
180 size += sizeof("SASL") - 1 + sizeof(CRLF) - 1;
809
da9c1521319d AUTH PLAIN LOGIN CRAM-MD5
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parents: 804
diff changeset
181
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diff changeset
182 for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0;
73b451d304c0 Mail: extensible auth methods in pop3 module.
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parents: 5989
diff changeset
183 m <= NGX_MAIL_AUTH_CRAM_MD5_ENABLED;
73b451d304c0 Mail: extensible auth methods in pop3 module.
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parents: 5989
diff changeset
184 m <<= 1, i++)
73b451d304c0 Mail: extensible auth methods in pop3 module.
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parents: 5989
diff changeset
185 {
73b451d304c0 Mail: extensible auth methods in pop3 module.
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parents: 5989
diff changeset
186 if (m & conf->auth_methods) {
73b451d304c0 Mail: extensible auth methods in pop3 module.
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parents: 5989
diff changeset
187 size += 1 + ngx_mail_pop3_auth_methods_names[i].len;
73b451d304c0 Mail: extensible auth methods in pop3 module.
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parents: 5989
diff changeset
188 }
809
da9c1521319d AUTH PLAIN LOGIN CRAM-MD5
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parents: 804
diff changeset
189 }
da9c1521319d AUTH PLAIN LOGIN CRAM-MD5
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parents: 804
diff changeset
190
2049
2a92804f4109 *) back out r2040
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parents: 1487
diff changeset
191 p = ngx_pnalloc(cf->pool, size);
583
4e296b7d25bf nginx-0.3.13-RELEASE import
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parents: 577
diff changeset
192 if (p == NULL) {
527
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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diff changeset
193 return NGX_CONF_ERROR;
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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parents: 523
diff changeset
194 }
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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parents: 523
diff changeset
195
1487
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diff changeset
196 conf->capability.len = size;
f69493e8faab ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
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parents: 1481
diff changeset
197 conf->capability.data = p;
583
4e296b7d25bf nginx-0.3.13-RELEASE import
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parents: 577
diff changeset
198
4e296b7d25bf nginx-0.3.13-RELEASE import
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parents: 577
diff changeset
199 p = ngx_cpymem(p, "+OK Capability list follows" CRLF,
4e296b7d25bf nginx-0.3.13-RELEASE import
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parents: 577
diff changeset
200 sizeof("+OK Capability list follows" CRLF) - 1);
527
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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parents: 523
diff changeset
201
1487
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Igor Sysoev <igor@sysoev.ru>
parents: 1481
diff changeset
202 for (i = 0; i < conf->capabilities.nelts; i++) {
583
4e296b7d25bf nginx-0.3.13-RELEASE import
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parents: 577
diff changeset
203 p = ngx_cpymem(p, c[i].data, c[i].len);
4e296b7d25bf nginx-0.3.13-RELEASE import
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parents: 577
diff changeset
204 *p++ = CR; *p++ = LF;
527
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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parents: 523
diff changeset
205 }
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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parents: 523
diff changeset
206
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diff changeset
207 p = ngx_cpymem(p, "SASL", sizeof("SASL") - 1);
809
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parents: 804
diff changeset
208
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parents: 5989
diff changeset
209 for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0;
73b451d304c0 Mail: extensible auth methods in pop3 module.
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parents: 5989
diff changeset
210 m <= NGX_MAIL_AUTH_CRAM_MD5_ENABLED;
73b451d304c0 Mail: extensible auth methods in pop3 module.
Maxim Dounin <mdounin@mdounin.ru>
parents: 5989
diff changeset
211 m <<= 1, i++)
73b451d304c0 Mail: extensible auth methods in pop3 module.
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parents: 5989
diff changeset
212 {
73b451d304c0 Mail: extensible auth methods in pop3 module.
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parents: 5989
diff changeset
213 if (m & conf->auth_methods) {
73b451d304c0 Mail: extensible auth methods in pop3 module.
Maxim Dounin <mdounin@mdounin.ru>
parents: 5989
diff changeset
214 *p++ = ' ';
73b451d304c0 Mail: extensible auth methods in pop3 module.
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parents: 5989
diff changeset
215 p = ngx_cpymem(p, ngx_mail_pop3_auth_methods_names[i].data,
73b451d304c0 Mail: extensible auth methods in pop3 module.
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parents: 5989
diff changeset
216 ngx_mail_pop3_auth_methods_names[i].len);
73b451d304c0 Mail: extensible auth methods in pop3 module.
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parents: 5989
diff changeset
217 }
809
da9c1521319d AUTH PLAIN LOGIN CRAM-MD5
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parents: 804
diff changeset
218 }
da9c1521319d AUTH PLAIN LOGIN CRAM-MD5
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parents: 804
diff changeset
219
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diff changeset
220 *p++ = CR; *p++ = LF;
73b451d304c0 Mail: extensible auth methods in pop3 module.
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parents: 5989
diff changeset
221
583
4e296b7d25bf nginx-0.3.13-RELEASE import
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parents: 577
diff changeset
222 *p++ = '.'; *p++ = CR; *p = LF;
4e296b7d25bf nginx-0.3.13-RELEASE import
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parents: 577
diff changeset
223
4e296b7d25bf nginx-0.3.13-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 577
diff changeset
224
4e296b7d25bf nginx-0.3.13-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 577
diff changeset
225 size += sizeof("STLS" CRLF) - 1;
527
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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parents: 523
diff changeset
226
2049
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parents: 1487
diff changeset
227 p = ngx_pnalloc(cf->pool, size);
583
4e296b7d25bf nginx-0.3.13-RELEASE import
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parents: 577
diff changeset
228 if (p == NULL) {
4e296b7d25bf nginx-0.3.13-RELEASE import
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diff changeset
229 return NGX_CONF_ERROR;
4e296b7d25bf nginx-0.3.13-RELEASE import
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parents: 577
diff changeset
230 }
4e296b7d25bf nginx-0.3.13-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 577
diff changeset
231
1487
f69493e8faab ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
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parents: 1481
diff changeset
232 conf->starttls_capability.len = size;
f69493e8faab ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
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diff changeset
233 conf->starttls_capability.data = p;
583
4e296b7d25bf nginx-0.3.13-RELEASE import
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parents: 577
diff changeset
234
1487
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parents: 1481
diff changeset
235 p = ngx_cpymem(p, conf->capability.data,
f69493e8faab ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
Igor Sysoev <igor@sysoev.ru>
parents: 1481
diff changeset
236 conf->capability.len - (sizeof("." CRLF) - 1));
583
4e296b7d25bf nginx-0.3.13-RELEASE import
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parents: 577
diff changeset
237
4e296b7d25bf nginx-0.3.13-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 577
diff changeset
238 p = ngx_cpymem(p, "STLS" CRLF, sizeof("STLS" CRLF) - 1);
4e296b7d25bf nginx-0.3.13-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 577
diff changeset
239 *p++ = '.'; *p++ = CR; *p = LF;
527
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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parents: 523
diff changeset
240
7fa11e5c6e96 nginx-0.1.38-RELEASE import
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parents: 523
diff changeset
241
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diff changeset
242 size = sizeof("+OK methods supported:" CRLF) - 1
73b451d304c0 Mail: extensible auth methods in pop3 module.
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parents: 5989
diff changeset
243 + sizeof("." CRLF) - 1;
73b451d304c0 Mail: extensible auth methods in pop3 module.
Maxim Dounin <mdounin@mdounin.ru>
parents: 5989
diff changeset
244
73b451d304c0 Mail: extensible auth methods in pop3 module.
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parents: 5989
diff changeset
245 for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0;
73b451d304c0 Mail: extensible auth methods in pop3 module.
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parents: 5989
diff changeset
246 m <= NGX_MAIL_AUTH_CRAM_MD5_ENABLED;
73b451d304c0 Mail: extensible auth methods in pop3 module.
Maxim Dounin <mdounin@mdounin.ru>
parents: 5989
diff changeset
247 m <<= 1, i++)
73b451d304c0 Mail: extensible auth methods in pop3 module.
Maxim Dounin <mdounin@mdounin.ru>
parents: 5989
diff changeset
248 {
73b451d304c0 Mail: extensible auth methods in pop3 module.
Maxim Dounin <mdounin@mdounin.ru>
parents: 5989
diff changeset
249 if (m & conf->auth_methods) {
73b451d304c0 Mail: extensible auth methods in pop3 module.
Maxim Dounin <mdounin@mdounin.ru>
parents: 5989
diff changeset
250 size += ngx_mail_pop3_auth_methods_names[i].len
73b451d304c0 Mail: extensible auth methods in pop3 module.
Maxim Dounin <mdounin@mdounin.ru>
parents: 5989
diff changeset
251 + sizeof(CRLF) - 1;
73b451d304c0 Mail: extensible auth methods in pop3 module.
Maxim Dounin <mdounin@mdounin.ru>
parents: 5989
diff changeset
252 }
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253 }
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254
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255 p = ngx_pnalloc(cf->pool, size);
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256 if (p == NULL) {
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257 return NGX_CONF_ERROR;
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258 }
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259
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260 conf->auth_capability.data = p;
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261 conf->auth_capability.len = size;
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262
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263 p = ngx_cpymem(p, "+OK methods supported:" CRLF,
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264 sizeof("+OK methods supported:" CRLF) - 1);
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265
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266 for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0;
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267 m <= NGX_MAIL_AUTH_CRAM_MD5_ENABLED;
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268 m <<= 1, i++)
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269 {
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270 if (m & conf->auth_methods) {
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271 p = ngx_cpymem(p, ngx_mail_pop3_auth_methods_names[i].data,
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272 ngx_mail_pop3_auth_methods_names[i].len);
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273 *p++ = CR; *p++ = LF;
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274 }
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275 }
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276
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277 *p++ = '.'; *p++ = CR; *p = LF;
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278
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279
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280 p = ngx_pnalloc(cf->pool, stls_only_size);
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281 if (p == NULL) {
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282 return NGX_CONF_ERROR;
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283 }
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284
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285 conf->starttls_only_capability.len = stls_only_size;
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286 conf->starttls_only_capability.data = p;
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287
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288 p = ngx_cpymem(p, "+OK Capability list follows" CRLF,
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289 sizeof("+OK Capability list follows" CRLF) - 1);
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290
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291 for (i = 0; i < conf->capabilities.nelts; i++) {
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292 if (ngx_strcasecmp(c[i].data, (u_char *) "USER") == 0) {
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293 continue;
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294 }
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295
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296 p = ngx_cpymem(p, c[i].data, c[i].len);
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297 *p++ = CR; *p++ = LF;
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298 }
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299
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300 p = ngx_cpymem(p, "STLS" CRLF, sizeof("STLS" CRLF) - 1);
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301 *p++ = '.'; *p++ = CR; *p = LF;
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302
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303 return NGX_CONF_OK;
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304 }