diff options
Diffstat (limited to 'app/nginx/src/mail/ngx_mail_pop3_module.c')
| -rw-r--r-- | app/nginx/src/mail/ngx_mail_pop3_module.c | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/app/nginx/src/mail/ngx_mail_pop3_module.c b/app/nginx/src/mail/ngx_mail_pop3_module.c new file mode 100644 index 0000000..a673070 --- /dev/null +++ b/app/nginx/src/mail/ngx_mail_pop3_module.c @@ -0,0 +1,322 @@ + +/* + * Copyright (C) Igor Sysoev + * Copyright (C) Nginx, Inc. + */ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_event.h> +#include <ngx_mail.h> +#include <ngx_mail_pop3_module.h> + + +static void *ngx_mail_pop3_create_srv_conf(ngx_conf_t *cf); +static char *ngx_mail_pop3_merge_srv_conf(ngx_conf_t *cf, void *parent, + void *child); + + +static ngx_str_t ngx_mail_pop3_default_capabilities[] = { + ngx_string("TOP"), + ngx_string("USER"), + ngx_string("UIDL"), + ngx_null_string +}; + + +static ngx_conf_bitmask_t ngx_mail_pop3_auth_methods[] = { + { ngx_string("plain"), NGX_MAIL_AUTH_PLAIN_ENABLED }, + { ngx_string("apop"), NGX_MAIL_AUTH_APOP_ENABLED }, + { ngx_string("cram-md5"), NGX_MAIL_AUTH_CRAM_MD5_ENABLED }, + { ngx_string("external"), NGX_MAIL_AUTH_EXTERNAL_ENABLED }, + { ngx_null_string, 0 } +}; + + +static ngx_str_t ngx_mail_pop3_auth_methods_names[] = { + ngx_string("PLAIN"), + ngx_string("LOGIN"), + ngx_null_string, /* APOP */ + ngx_string("CRAM-MD5"), + ngx_string("EXTERNAL"), + ngx_null_string /* NONE */ +}; + + +static ngx_mail_protocol_t ngx_mail_pop3_protocol = { + ngx_string("pop3"), + { 110, 995, 0, 0 }, + NGX_MAIL_POP3_PROTOCOL, + + ngx_mail_pop3_init_session, + ngx_mail_pop3_init_protocol, + ngx_mail_pop3_parse_command, + ngx_mail_pop3_auth_state, + + ngx_string("-ERR internal server error" CRLF), + ngx_string("-ERR SSL certificate error" CRLF), + ngx_string("-ERR No required SSL certificate" CRLF) +}; + + +static ngx_command_t ngx_mail_pop3_commands[] = { + + { ngx_string("pop3_capabilities"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, + ngx_mail_capabilities, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_pop3_srv_conf_t, capabilities), + NULL }, + + { ngx_string("pop3_auth"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, + ngx_conf_set_bitmask_slot, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_pop3_srv_conf_t, auth_methods), + &ngx_mail_pop3_auth_methods }, + + ngx_null_command +}; + + +static ngx_mail_module_t ngx_mail_pop3_module_ctx = { + &ngx_mail_pop3_protocol, /* protocol */ + + NULL, /* create main configuration */ + NULL, /* init main configuration */ + + ngx_mail_pop3_create_srv_conf, /* create server configuration */ + ngx_mail_pop3_merge_srv_conf /* merge server configuration */ +}; + + +ngx_module_t ngx_mail_pop3_module = { + NGX_MODULE_V1, + &ngx_mail_pop3_module_ctx, /* module context */ + ngx_mail_pop3_commands, /* module directives */ + NGX_MAIL_MODULE, /* module type */ + NULL, /* init master */ + NULL, /* init module */ + NULL, /* init process */ + NULL, /* init thread */ + NULL, /* exit thread */ + NULL, /* exit process */ + NULL, /* exit master */ + NGX_MODULE_V1_PADDING +}; + + +static void * +ngx_mail_pop3_create_srv_conf(ngx_conf_t *cf) +{ + ngx_mail_pop3_srv_conf_t *pscf; + + pscf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_pop3_srv_conf_t)); + if (pscf == NULL) { + return NULL; + } + + if (ngx_array_init(&pscf->capabilities, cf->pool, 4, sizeof(ngx_str_t)) + != NGX_OK) + { + return NULL; + } + + return pscf; +} + + +static char * +ngx_mail_pop3_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) +{ + ngx_mail_pop3_srv_conf_t *prev = parent; + ngx_mail_pop3_srv_conf_t *conf = child; + + u_char *p; + size_t size, stls_only_size; + ngx_str_t *c, *d; + ngx_uint_t i, m; + + ngx_conf_merge_bitmask_value(conf->auth_methods, + prev->auth_methods, + (NGX_CONF_BITMASK_SET + |NGX_MAIL_AUTH_PLAIN_ENABLED)); + + if (conf->auth_methods & NGX_MAIL_AUTH_PLAIN_ENABLED) { + conf->auth_methods |= NGX_MAIL_AUTH_LOGIN_ENABLED; + } + + if (conf->capabilities.nelts == 0) { + conf->capabilities = prev->capabilities; + } + + if (conf->capabilities.nelts == 0) { + + for (d = ngx_mail_pop3_default_capabilities; d->len; d++) { + c = ngx_array_push(&conf->capabilities); + if (c == NULL) { + return NGX_CONF_ERROR; + } + + *c = *d; + } + } + + size = sizeof("+OK Capability list follows" CRLF) - 1 + + sizeof("." CRLF) - 1; + + stls_only_size = size + sizeof("STLS" CRLF) - 1; + + c = conf->capabilities.elts; + for (i = 0; i < conf->capabilities.nelts; i++) { + size += c[i].len + sizeof(CRLF) - 1; + + if (ngx_strcasecmp(c[i].data, (u_char *) "USER") == 0) { + continue; + } + + stls_only_size += c[i].len + sizeof(CRLF) - 1; + } + + size += sizeof("SASL") - 1 + sizeof(CRLF) - 1; + + for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; + m <= NGX_MAIL_AUTH_EXTERNAL_ENABLED; + m <<= 1, i++) + { + if (ngx_mail_pop3_auth_methods_names[i].len == 0) { + continue; + } + + if (m & conf->auth_methods) { + size += 1 + ngx_mail_pop3_auth_methods_names[i].len; + } + } + + p = ngx_pnalloc(cf->pool, size); + if (p == NULL) { + return NGX_CONF_ERROR; + } + + conf->capability.len = size; + conf->capability.data = p; + + p = ngx_cpymem(p, "+OK Capability list follows" CRLF, + sizeof("+OK Capability list follows" CRLF) - 1); + + for (i = 0; i < conf->capabilities.nelts; i++) { + p = ngx_cpymem(p, c[i].data, c[i].len); + *p++ = CR; *p++ = LF; + } + + p = ngx_cpymem(p, "SASL", sizeof("SASL") - 1); + + for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; + m <= NGX_MAIL_AUTH_EXTERNAL_ENABLED; + m <<= 1, i++) + { + if (ngx_mail_pop3_auth_methods_names[i].len == 0) { + continue; + } + + if (m & conf->auth_methods) { + *p++ = ' '; + p = ngx_cpymem(p, ngx_mail_pop3_auth_methods_names[i].data, + ngx_mail_pop3_auth_methods_names[i].len); + } + } + + *p++ = CR; *p++ = LF; + + *p++ = '.'; *p++ = CR; *p = LF; + + + size += sizeof("STLS" CRLF) - 1; + + p = ngx_pnalloc(cf->pool, size); + if (p == NULL) { + return NGX_CONF_ERROR; + } + + conf->starttls_capability.len = size; + conf->starttls_capability.data = p; + + p = ngx_cpymem(p, conf->capability.data, + conf->capability.len - (sizeof("." CRLF) - 1)); + + p = ngx_cpymem(p, "STLS" CRLF, sizeof("STLS" CRLF) - 1); + *p++ = '.'; *p++ = CR; *p = LF; + + + size = sizeof("+OK methods supported:" CRLF) - 1 + + sizeof("." CRLF) - 1; + + for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; + m <= NGX_MAIL_AUTH_EXTERNAL_ENABLED; + m <<= 1, i++) + { + if (ngx_mail_pop3_auth_methods_names[i].len == 0) { + continue; + } + + if (m & conf->auth_methods) { + size += ngx_mail_pop3_auth_methods_names[i].len + + sizeof(CRLF) - 1; + } + } + + p = ngx_pnalloc(cf->pool, size); + if (p == NULL) { + return NGX_CONF_ERROR; + } + + conf->auth_capability.data = p; + conf->auth_capability.len = size; + + p = ngx_cpymem(p, "+OK methods supported:" CRLF, + sizeof("+OK methods supported:" CRLF) - 1); + + for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; + m <= NGX_MAIL_AUTH_EXTERNAL_ENABLED; + m <<= 1, i++) + { + if (ngx_mail_pop3_auth_methods_names[i].len == 0) { + continue; + } + + if (m & conf->auth_methods) { + p = ngx_cpymem(p, ngx_mail_pop3_auth_methods_names[i].data, + ngx_mail_pop3_auth_methods_names[i].len); + *p++ = CR; *p++ = LF; + } + } + + *p++ = '.'; *p++ = CR; *p = LF; + + + p = ngx_pnalloc(cf->pool, stls_only_size); + if (p == NULL) { + return NGX_CONF_ERROR; + } + + conf->starttls_only_capability.len = stls_only_size; + conf->starttls_only_capability.data = p; + + p = ngx_cpymem(p, "+OK Capability list follows" CRLF, + sizeof("+OK Capability list follows" CRLF) - 1); + + for (i = 0; i < conf->capabilities.nelts; i++) { + if (ngx_strcasecmp(c[i].data, (u_char *) "USER") == 0) { + continue; + } + + p = ngx_cpymem(p, c[i].data, c[i].len); + *p++ = CR; *p++ = LF; + } + + p = ngx_cpymem(p, "STLS" CRLF, sizeof("STLS" CRLF) - 1); + *p++ = '.'; *p++ = CR; *p = LF; + + return NGX_CONF_OK; +} |