X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fsrc%2Facl.c;h=5af408c5c1346440df8bc6c2758c4d7a39fa7c18;hb=d9d29e0555e6a3bf33cc616693d98c982796201f;hp=50d5d85941e7c1107d3082c8b0d148a1d0b1d4f2;hpb=8958301403f65d219d8fd5283cef525b666b4971;p=user%2Fhenk%2Fcode%2Fexim.git diff --git a/src/src/acl.c b/src/src/acl.c index 50d5d8594..5af408c5c 100644 --- a/src/src/acl.c +++ b/src/src/acl.c @@ -2,7 +2,7 @@ * Exim - an Internet mail transport agent * *************************************************/ -/* Copyright (c) University of Cambridge 1995 - 2009 */ +/* Copyright (c) University of Cambridge 1995 - 2012 */ /* See the file NOTICE for conditions of use and distribution. */ /* Code for handling Access Control Lists (ACLs) */ @@ -88,6 +88,7 @@ enum { ACLC_ACL, #ifdef WITH_CONTENT_SCAN ACLC_REGEX, #endif + ACLC_REMOVE_HEADER, ACLC_SENDER_DOMAINS, ACLC_SENDERS, ACLC_SET, @@ -150,6 +151,7 @@ static uschar *conditions[] = { #ifdef WITH_CONTENT_SCAN US"regex", #endif + US"remove_header", US"sender_domains", US"senders", US"set", #ifdef WITH_CONTENT_SCAN US"spam", @@ -173,9 +175,11 @@ enum { #ifndef DISABLE_DKIM CONTROL_DKIM_VERIFY, #endif + CONTROL_DSCP, CONTROL_ERROR, CONTROL_CASEFUL_LOCAL_PART, CONTROL_CASELOWER_LOCAL_PART, + CONTROL_CUTTHROUGH_DELIVERY, CONTROL_ENFORCE_SYNC, CONTROL_NO_ENFORCE_SYNC, CONTROL_FREEZE, @@ -207,9 +211,11 @@ static uschar *controls[] = { #ifndef DISABLE_DKIM US"dkim_disable_verify", #endif + US"dscp", US"error", US"caseful_local_part", US"caselower_local_part", + US"cutthrough_delivery", US"enforce_sync", US"no_enforce_sync", US"freeze", @@ -232,7 +238,7 @@ at the outer level. In the other cases, expansion already occurs in the checking functions. */ static uschar cond_expand_at_top[] = { - TRUE, /* acl */ + FALSE, /* acl */ TRUE, /* add_header */ FALSE, /* authenticated */ #ifdef EXPERIMENTAL_BRIGHTMAIL @@ -276,6 +282,7 @@ static uschar cond_expand_at_top[] = { #ifdef WITH_CONTENT_SCAN TRUE, /* regex */ #endif + TRUE, /* remove_header */ FALSE, /* sender_domains */ FALSE, /* senders */ TRUE, /* set */ @@ -336,6 +343,7 @@ static uschar cond_modifiers[] = { #ifdef WITH_CONTENT_SCAN FALSE, /* regex */ #endif + TRUE, /* remove_header */ FALSE, /* sender_domains */ FALSE, /* senders */ TRUE, /* set */ @@ -461,6 +469,12 @@ static unsigned int cond_forbids[] = { (1<text; + while ((cp = Ustrchr(s, '\n')) != NULL) + { + if (cp[1] == '\0') break; + + /* contains embedded newline; needs doubling */ + ret = string_cat(ret, &size, &ptr, s, cp-s+1); + ret = string_cat(ret, &size, &ptr, US"\n", 1); + s = cp+1; + } + /* last bit of header */ + + ret = string_cat(ret, &size, &ptr, s, cp-s+1); /* newline-sep list */ + } +while((h = h->next)); + +ret[ptr-1] = '\0'; /* overwrite last newline */ +return ret; +} + + +/************************************************* +* Set up removed header line(s) * +*************************************************/ + +/* This function is called by the remove_header modifier. The argument is +treated as a sequence of header names which are added to a colon separated +list, provided there isn't an identical one already there. + +Argument: string of header names +Returns: nothing +*/ + +static void +setup_remove_header(uschar *hnames) +{ +if (*hnames != 0) + { + if (acl_removed_headers == NULL) + acl_removed_headers = hnames; + else + acl_removed_headers = string_sprintf("%s : %s", acl_removed_headers, hnames); + } +} + + /************************************************* * Handle warnings * @@ -1602,7 +1691,7 @@ switch(vp->value) test whether it was successful or not. (This is for optional verification; for mandatory verification, the connection doesn't last this long.) */ - if (tls_certificate_verified) return OK; + if (tls_in.certificate_verified) return OK; *user_msgptr = US"no verified certificate"; return FAIL; @@ -1723,16 +1812,16 @@ while ((ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)) != NULL) { callout_opt_t * op; - double period; + double period = 1.0F; for (op= callout_opt_list; op->name; op++) - if (strncmpic(opt, op->name, strlen(op->name)) == 0) + if (strncmpic(opt, op->name, Ustrlen(op->name)) == 0) break; verify_options |= op->flag; if (op->has_option) { - opt += strlen(op->name); + opt += Ustrlen(op->name); while (isspace(*opt)) opt++; if (*opt++ != '=') { @@ -2093,7 +2182,7 @@ uschar buffer[STRING_SPRINTF_BUFFER_SIZE]; va_start(ap, format); if (!string_vformat(buffer, sizeof(buffer), format, ap)) log_write(0, LOG_MAIN|LOG_PANIC_DIE, - "string_sprintf expansion was longer than %d", sizeof(buffer)); + "string_sprintf expansion was longer than " SIZE_T_FMT, sizeof(buffer)); va_end(ap); *log_msgptr = string_sprintf( "error in arguments to \"ratelimit\" condition: %s", buffer); @@ -2228,7 +2317,7 @@ while ((ss = string_nextinlist(&arg, &sep, big_buffer, big_buffer_size)) else if (strcmpic(ss, US"per_addr") == 0) { RATE_SET(mode, PER_RCPT); - if (where != ACL_WHERE_RCPT) badacl = TRUE, unique = "*"; + if (where != ACL_WHERE_RCPT) badacl = TRUE, unique = US"*"; else unique = string_sprintf("%s@%s", deliver_localpart, deliver_domain); } else if (strncmpic(ss, US"count=", 6) == 0) @@ -2772,14 +2861,14 @@ for (; cb != NULL; cb = cb->next) "discard" verb. */ case ACLC_ACL: - rc = acl_check_internal(where, addr, arg, level+1, user_msgptr, log_msgptr); - if (rc == DISCARD && verb != ACL_ACCEPT && verb != ACL_DISCARD) - { - *log_msgptr = string_sprintf("nested ACL returned \"discard\" for " - "\"%s\" command (only allowed with \"accept\" or \"discard\")", - verbs[verb]); - return ERROR; - } + rc = acl_check_wargs(where, addr, arg, level+1, user_msgptr, log_msgptr); + if (rc == DISCARD && verb != ACL_ACCEPT && verb != ACL_DISCARD) + { + *log_msgptr = string_sprintf("nested ACL returned \"discard\" for " + "\"%s\" command (only allowed with \"accept\" or \"discard\")", + verbs[verb]); + return ERROR; + } break; case ACLC_AUTHENTICATED: @@ -2847,6 +2936,46 @@ for (; cb != NULL; cb = cb->next) break; #endif + case CONTROL_DSCP: + if (*p == '/') + { + int fd, af, level, optname, value; + /* If we are acting on stdin, the setsockopt may fail if stdin is not + a socket; we can accept that, we'll just debug-log failures anyway. */ + fd = fileno(smtp_in); + af = ip_get_address_family(fd); + if (af < 0) + { + HDEBUG(D_acl) + debug_printf("smtp input is probably not a socket [%s], not setting DSCP\n", + strerror(errno)); + break; + } + if (dscp_lookup(p+1, af, &level, &optname, &value)) + { + if (setsockopt(fd, level, optname, &value, sizeof(value)) < 0) + { + HDEBUG(D_acl) debug_printf("failed to set input DSCP[%s]: %s\n", + p+1, strerror(errno)); + } + else + { + HDEBUG(D_acl) debug_printf("set input DSCP to \"%s\"\n", p+1); + } + } + else + { + *log_msgptr = string_sprintf("unrecognised DSCP value in \"control=%s\"", arg); + return ERROR; + } + } + else + { + *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg); + return ERROR; + } + break; + case CONTROL_ERROR: return ERROR; @@ -2986,6 +3115,20 @@ for (; cb != NULL; cb = cb->next) case CONTROL_SUPPRESS_LOCAL_FIXUPS: suppress_local_fixups = TRUE; break; + + case CONTROL_CUTTHROUGH_DELIVERY: + if (deliver_freeze) + { + *log_msgptr = string_sprintf("\"control=%s\" on frozen item", arg); + return ERROR; + } + if (queue_only_policy) + { + *log_msgptr = string_sprintf("\"control=%s\" on queue-only item", arg); + return ERROR; + } + cutthrough_delivery = TRUE; + break; } break; @@ -3099,11 +3242,11 @@ for (; cb != NULL; cb = cb->next) writing is poorly documented. */ case ACLC_ENCRYPTED: - if (tls_cipher == NULL) rc = FAIL; else + if (tls_in.cipher == NULL) rc = FAIL; else { uschar *endcipher = NULL; - uschar *cipher = Ustrchr(tls_cipher, ':'); - if (cipher == NULL) cipher = tls_cipher; else + uschar *cipher = Ustrchr(tls_in.cipher, ':'); + if (cipher == NULL) cipher = tls_in.cipher; else { endcipher = Ustrchr(++cipher, ':'); if (endcipher != NULL) *endcipher = 0; @@ -3227,6 +3370,10 @@ for (; cb != NULL; cb = cb->next) break; #endif + case ACLC_REMOVE_HEADER: + setup_remove_header(arg); + break; + case ACLC_SENDER_DOMAINS: { uschar *sdomain; @@ -3796,10 +3943,97 @@ return FAIL; } + + +/* Same args as acl_check_internal() above, but the string s is +the name of an ACL followed optionally by up to 9 space-separated arguments. +The name and args are separately expanded. Args go into $acl_arg globals. */ +static int +acl_check_wargs(int where, address_item *addr, uschar *s, int level, + uschar **user_msgptr, uschar **log_msgptr) +{ +uschar * tmp; +uschar * tmp_arg[9]; /* must match acl_arg[] */ +uschar * sav_arg[9]; /* must match acl_arg[] */ +int sav_narg; +uschar * name; +int i; +int ret; + +if (!(tmp = string_dequote(&s)) || !(name = expand_string(tmp))) + goto bad; + +for (i = 0; i < 9; i++) + { + while (*s && isspace(*s)) s++; + if (!*s) break; + if (!(tmp = string_dequote(&s)) || !(tmp_arg[i] = expand_string(tmp))) + { + tmp = name; + goto bad; + } + } + +sav_narg = acl_narg; +acl_narg = i; +for (i = 0; i < acl_narg; i++) + { + sav_arg[i] = acl_arg[i]; + acl_arg[i] = tmp_arg[i]; + } +while (i < 9) + { + sav_arg[i] = acl_arg[i]; + acl_arg[i++] = NULL; + } + +ret = acl_check_internal(where, addr, name, level, user_msgptr, log_msgptr); + +acl_narg = sav_narg; +for (i = 0; i < 9; i++) acl_arg[i] = sav_arg[i]; +return ret; + +bad: +if (expand_string_forcedfail) return ERROR; +*log_msgptr = string_sprintf("failed to expand ACL string \"%s\": %s", + tmp, expand_string_message); +return search_find_defer?DEFER:ERROR; +} + + + /************************************************* * Check access using an ACL * *************************************************/ +/* Alternate interface for ACL, used by expansions */ +int +acl_eval(int where, uschar *s, uschar **user_msgptr, uschar **log_msgptr) +{ +address_item adb; +address_item *addr = NULL; + +*user_msgptr = *log_msgptr = NULL; +sender_verified_failed = NULL; +ratelimiters_cmd = NULL; +log_reject_target = LOG_MAIN|LOG_REJECT; + +if (where == ACL_WHERE_RCPT) + { + adb = address_defaults; + addr = &adb; + addr->address = expand_string(US"$local_part@$domain"); + addr->domain = deliver_domain; + addr->local_part = deliver_localpart; + addr->cc_local_part = deliver_localpart; + addr->lc_local_part = deliver_localpart; + } + +return acl_check_internal(where, addr, s, 0, user_msgptr, log_msgptr); +} + + + /* This is the external interface for ACL checks. It sets up an address and the expansions for $domain and $local_part when called after RCPT, then calls acl_check_internal() to do the actual work. @@ -3818,6 +4052,7 @@ Returns: OK access is granted by an ACCEPT verb DEFER can't tell at the moment ERROR disaster */ +int acl_where = ACL_WHERE_UNKNOWN; int acl_check(int where, uschar *recipient, uschar *s, uschar **user_msgptr, @@ -3846,7 +4081,53 @@ if (where == ACL_WHERE_RCPT) deliver_localpart = addr->local_part; } +acl_where = where; rc = acl_check_internal(where, addr, s, 0, user_msgptr, log_msgptr); +acl_where = ACL_WHERE_UNKNOWN; + +/* Cutthrough - if requested, +and WHERE_RCPT and not yet opened conn as result of recipient-verify, +and rcpt acl returned accept, +and first recipient (cancel on any subsequents) +open one now and run it up to RCPT acceptance. +A failed verify should cancel cutthrough request. + +Initial implementation: dual-write to spool. +Assume the rxd datastream is now being copied byte-for-byte to an open cutthrough connection. + +Cease cutthrough copy on rxd final dot; do not send one. + +On a data acl, if not accept and a cutthrough conn is open, hard-close it (no SMTP niceness). + +On data acl accept, terminate the dataphase on an open cutthrough conn. If accepted or +perm-rejected, reflect that to the original sender - and dump the spooled copy. +If temp-reject, close the conn (and keep the spooled copy). +If conn-failure, no action (and keep the spooled copy). +*/ +switch (where) +{ +case ACL_WHERE_RCPT: + if( rcpt_count > 1 ) + cancel_cutthrough_connection("more than one recipient"); + else if (rc == OK && cutthrough_delivery && cutthrough_fd < 0) + open_cutthrough_connection(addr); + break; + +case ACL_WHERE_PREDATA: + if( rc == OK ) + cutthrough_predata(); + else + cancel_cutthrough_connection("predata acl not ok"); + break; + +case ACL_WHERE_QUIT: +case ACL_WHERE_NOTQUIT: + cancel_cutthrough_connection("quit or notquit"); + break; + +default: + break; +} deliver_domain = deliver_localpart = deliver_address_data = sender_address_data = NULL; @@ -3885,7 +4166,6 @@ return rc; } - /************************************************* * Create ACL variable * *************************************************/