diff options
Diffstat (limited to 'src/sieve.c')
| -rw-r--r-- | src/sieve.c | 3629 |
1 files changed, 3629 insertions, 0 deletions
diff --git a/src/sieve.c b/src/sieve.c new file mode 100644 index 0000000..af3bc9d --- /dev/null +++ b/src/sieve.c @@ -0,0 +1,3629 @@ +/************************************************* +* Exim - an Internet mail transport agent * +*************************************************/ + +/* + * Copyright (c) The Exim Maintainers 2016 - 2022 + * Copyright (c) Michael Haardt 2003 - 2015 + * See the file NOTICE for conditions of use and distribution. + */ + +/* This code was contributed by Michael Haardt. */ + + +/* Sieve mail filter. */ + +#include <ctype.h> +#include <errno.h> +#include <limits.h> +#include <stdlib.h> +#include <string.h> + +#include "exim.h" + +#if HAVE_ICONV +# include <iconv.h> +#endif + +/* Define this for RFC compliant \r\n end-of-line terminators. */ +/* Undefine it for UNIX-style \n end-of-line terminators (default). */ +#undef RFC_EOL + +/* Define this for development of the Sieve extension "encoded-character". */ +#define ENCODED_CHARACTER + +/* Define this for development of the Sieve extension "envelope-auth". */ +#undef ENVELOPE_AUTH + +/* Define this for development of the Sieve extension "enotify". */ +#define ENOTIFY + +/* Define this for the Sieve extension "subaddress". */ +#define SUBADDRESS + +/* Define this for the Sieve extension "vacation". */ +#define VACATION + +/* Must be >= 1 */ +#define VACATION_MIN_DAYS 1 +/* Must be >= VACATION_MIN_DAYS, must be > 7, should be > 30 */ +#define VACATION_MAX_DAYS 31 + +/* Keep this at 75 to accept only RFC compliant MIME words. */ +/* Increase it if you want to match headers from buggy MUAs. */ +#define MIMEWORD_LENGTH 75 + +struct Sieve + { + const uschar *filter; + const uschar *pc; + int line; + const uschar *errmsg; + int keep; + int require_envelope; + int require_fileinto; +#ifdef ENCODED_CHARACTER + int require_encoded_character; +#endif +#ifdef ENVELOPE_AUTH + int require_envelope_auth; +#endif +#ifdef ENOTIFY + int require_enotify; + struct Notification *notified; +#endif + const uschar *enotify_mailto_owner; +#ifdef SUBADDRESS + int require_subaddress; +#endif +#ifdef VACATION + int require_vacation; + int vacation_ran; +#endif + const uschar *vacation_directory; + const uschar *subaddress; + const uschar *useraddress; + int require_copy; + int require_iascii_numeric; + }; + +enum Comparator { COMP_OCTET, COMP_EN_ASCII_CASEMAP, COMP_ASCII_NUMERIC }; +enum MatchType { MATCH_IS, MATCH_CONTAINS, MATCH_MATCHES }; +#ifdef SUBADDRESS +enum AddressPart { ADDRPART_USER, ADDRPART_DETAIL, ADDRPART_LOCALPART, ADDRPART_DOMAIN, ADDRPART_ALL }; +#else +enum AddressPart { ADDRPART_LOCALPART, ADDRPART_DOMAIN, ADDRPART_ALL }; +#endif +enum RelOp { LT, LE, EQ, GE, GT, NE }; + +struct String + { + uschar *character; + int length; + }; + +struct Notification + { + struct String method; + struct String importance; + struct String message; + struct Notification *next; + }; + +/* This should be a complete list of supported extensions, so that an external +ManageSieve (RFC 5804) program can interrogate the current Exim binary for the +list of extensions and provide correct information to a client. + +We'll emit the list in the order given here; keep it alphabetically sorted, so +that callers don't get surprised. + +List *MUST* end with a NULL. Which at least makes ifdef-vs-comma easier. */ + +const uschar *exim_sieve_extension_list[] = { + CUS"comparator-i;ascii-numeric", + CUS"copy", +#ifdef ENCODED_CHARACTER + CUS"encoded-character", +#endif +#ifdef ENOTIFY + CUS"enotify", +#endif + CUS"envelope", +#ifdef ENVELOPE_AUTH + CUS"envelope-auth", +#endif + CUS"fileinto", +#ifdef SUBADDRESS + CUS"subaddress", +#endif +#ifdef VACATION + CUS"vacation", +#endif + NULL +}; + +static int eq_asciicase(const struct String *needle, const struct String *haystack, int match_prefix); +static int parse_test(struct Sieve *filter, int *cond, int exec); +static int parse_commands(struct Sieve *filter, int exec, address_item **generated); + +static uschar str_from_c[]="From"; +static const struct String str_from={ str_from_c, 4 }; +static uschar str_to_c[]="To"; +static const struct String str_to={ str_to_c, 2 }; +static uschar str_cc_c[]="Cc"; +static const struct String str_cc={ str_cc_c, 2 }; +static uschar str_bcc_c[]="Bcc"; +static const struct String str_bcc={ str_bcc_c, 3 }; +#ifdef ENVELOPE_AUTH +static uschar str_auth_c[]="auth"; +static const struct String str_auth={ str_auth_c, 4 }; +#endif +static uschar str_sender_c[]="Sender"; +static const struct String str_sender={ str_sender_c, 6 }; +static uschar str_resent_from_c[]="Resent-From"; +static const struct String str_resent_from={ str_resent_from_c, 11 }; +static uschar str_resent_to_c[]="Resent-To"; +static const struct String str_resent_to={ str_resent_to_c, 9 }; +static uschar str_fileinto_c[]="fileinto"; +static const struct String str_fileinto={ str_fileinto_c, 8 }; +static uschar str_envelope_c[]="envelope"; +static const struct String str_envelope={ str_envelope_c, 8 }; +#ifdef ENCODED_CHARACTER +static uschar str_encoded_character_c[]="encoded-character"; +static const struct String str_encoded_character={ str_encoded_character_c, 17 }; +#endif +#ifdef ENVELOPE_AUTH +static uschar str_envelope_auth_c[]="envelope-auth"; +static const struct String str_envelope_auth={ str_envelope_auth_c, 13 }; +#endif +#ifdef ENOTIFY +static uschar str_enotify_c[]="enotify"; +static const struct String str_enotify={ str_enotify_c, 7 }; +static uschar str_online_c[]="online"; +static const struct String str_online={ str_online_c, 6 }; +static uschar str_maybe_c[]="maybe"; +static const struct String str_maybe={ str_maybe_c, 5 }; +static uschar str_auto_submitted_c[]="Auto-Submitted"; +static const struct String str_auto_submitted={ str_auto_submitted_c, 14 }; +#endif +#ifdef SUBADDRESS +static uschar str_subaddress_c[]="subaddress"; +static const struct String str_subaddress={ str_subaddress_c, 10 }; +#endif +#ifdef VACATION +static uschar str_vacation_c[]="vacation"; +static const struct String str_vacation={ str_vacation_c, 8 }; +static uschar str_subject_c[]="Subject"; +static const struct String str_subject={ str_subject_c, 7 }; +#endif +static uschar str_copy_c[]="copy"; +static const struct String str_copy={ str_copy_c, 4 }; +static uschar str_iascii_casemap_c[]="i;ascii-casemap"; +static const struct String str_iascii_casemap={ str_iascii_casemap_c, 15 }; +static uschar str_enascii_casemap_c[]="en;ascii-casemap"; +static const struct String str_enascii_casemap={ str_enascii_casemap_c, 16 }; +static uschar str_ioctet_c[]="i;octet"; +static const struct String str_ioctet={ str_ioctet_c, 7 }; +static uschar str_iascii_numeric_c[]="i;ascii-numeric"; +static const struct String str_iascii_numeric={ str_iascii_numeric_c, 15 }; +static uschar str_comparator_iascii_casemap_c[]="comparator-i;ascii-casemap"; +static const struct String str_comparator_iascii_casemap={ str_comparator_iascii_casemap_c, 26 }; +static uschar str_comparator_enascii_casemap_c[]="comparator-en;ascii-casemap"; +static const struct String str_comparator_enascii_casemap={ str_comparator_enascii_casemap_c, 27 }; +static uschar str_comparator_ioctet_c[]="comparator-i;octet"; +static const struct String str_comparator_ioctet={ str_comparator_ioctet_c, 18 }; +static uschar str_comparator_iascii_numeric_c[]="comparator-i;ascii-numeric"; +static const struct String str_comparator_iascii_numeric={ str_comparator_iascii_numeric_c, 26 }; + + +/************************************************* +* Encode to quoted-printable * +*************************************************/ + +/* +Arguments: + src UTF-8 string + dst US-ASCII string + +Returns + dst +*/ + +static struct String * +quoted_printable_encode(const struct String *src, struct String *dst) +{ +uschar *new = NULL; +uschar ch; +size_t line; + +/* Two passes: one to count output allocation size, second +to do the encoding */ + +for (int pass = 0; pass <= 1; pass++) + { + line=0; + if (pass==0) + dst->length=0; + else + { + dst->character = store_get(dst->length+1, src->character); /* plus one for \0 */ + new=dst->character; + } + for (const uschar * start = src->character, * end = start + src->length; + start < end; ++start) + { + ch=*start; + if (line>=73) /* line length limit */ + { + if (pass==0) + dst->length+=2; + else + { + *new++='='; /* line split */ + *new++='\n'; + } + line=0; + } + if ( (ch>='!' && ch<='<') + || (ch>='>' && ch<='~') + || ( (ch=='\t' || ch==' ') + && start+2<end + && (*(start+1)!='\r' || *(start+2)!='\n') /* CRLF */ + ) + ) + { + if (pass==0) + ++dst->length; + else + *new++=*start; /* copy char */ + ++line; + } + else if (ch=='\r' && start+1<end && *(start+1)=='\n') /* CRLF */ + { + if (pass==0) + ++dst->length; + else + *new++='\n'; /* NL */ + line=0; + ++start; /* consume extra input char */ + } + else + { + if (pass==0) + dst->length+=3; + else + { /* encoded char */ + new += sprintf(CS new,"=%02X",ch); + } + line+=3; + } + } + } + *new='\0'; /* not included in length, but nice */ + return dst; +} + + +/************************************************* +* Check mail address for correct syntax * +*************************************************/ + +/* +Check mail address for being syntactically correct. + +Arguments: + filter points to the Sieve filter including its state + address String containing one address + +Returns + 1 Mail address is syntactically OK + -1 syntax error +*/ + +int check_mail_address(struct Sieve *filter, const struct String *address) +{ +int start, end, domain; +uschar *error,*ss; + +if (address->length>0) + { + ss = parse_extract_address(address->character, &error, &start, &end, &domain, + FALSE); + if (!ss) + { + filter->errmsg=string_sprintf("malformed address \"%s\" (%s)", + address->character, error); + return -1; + } + else + return 1; + } +else + { + filter->errmsg=CUS "empty address"; + return -1; + } +} + + +/************************************************* +* Decode URI encoded string * +*************************************************/ + +/* +Arguments: + str URI encoded string + +Returns + 0 Decoding successful + -1 Encoding error +*/ + +#ifdef ENOTIFY +static int +uri_decode(struct String *str) +{ +uschar *s,*t,*e; + +if (str->length==0) return 0; +for (s=str->character,t=s,e=s+str->length; s<e; ) + if (*s=='%') + { + if (s+2<e && isxdigit(*(s+1)) && isxdigit(*(s+2))) + { + *t++=((isdigit(*(s+1)) ? *(s+1)-'0' : tolower(*(s+1))-'a'+10)<<4) + | (isdigit(*(s+2)) ? *(s+2)-'0' : tolower(*(s+2))-'a'+10); + s+=3; + } + else return -1; + } + else + *t++=*s++; + +*t='\0'; +str->length=t-str->character; +return 0; +} + + +/************************************************* +* Parse mailto URI * +*************************************************/ + +/* +Parse mailto-URI. + + mailtoURI = "mailto:" [ to ] [ headers ] + to = [ addr-spec *("%2C" addr-spec ) ] + headers = "?" header *( "&" header ) + header = hname "=" hvalue + hname = *urlc + hvalue = *urlc + +Arguments: + filter points to the Sieve filter including its state + uri URI, excluding scheme + recipient + body + +Returns + 1 URI is syntactically OK + 0 Unknown URI scheme + -1 syntax error +*/ + +static int +parse_mailto_uri(struct Sieve *filter, const uschar *uri, + string_item **recipient, struct String *header, struct String *subject, + struct String *body) +{ +const uschar *start; +struct String to, hname; +struct String hvalue = {.character = NULL, .length = 0}; +string_item *new; + +if (Ustrncmp(uri,"mailto:",7)) + { + filter->errmsg=US "Unknown URI scheme"; + return 0; + } + +uri+=7; +if (*uri && *uri!='?') + for (;;) + { + /* match to */ + for (start=uri; *uri && *uri!='?' && (*uri!='%' || *(uri+1)!='2' || tolower(*(uri+2))!='c'); ++uri); + if (uri>start) + { + gstring * g = string_catn(NULL, start, uri-start); + + to.character = string_from_gstring(g); + to.length = g->ptr; + if (uri_decode(&to)==-1) + { + filter->errmsg=US"Invalid URI encoding"; + return -1; + } + new = store_get(sizeof(string_item), GET_UNTAINTED); + new->text = store_get(to.length+1, to.character); + if (to.length) memcpy(new->text, to.character, to.length); + new->text[to.length] = '\0'; + new->next = *recipient; + *recipient = new; + } + else + { + filter->errmsg = US"Missing addr-spec in URI"; + return -1; + } + if (*uri=='%') uri+=3; + else break; + } +if (*uri=='?') + { + ++uri; + for (;;) + { + /* match hname */ + for (start=uri; *uri && (isalnum(*uri) || strchr("$-_.+!*'(),%",*uri)); ++uri); + if (uri>start) + { + gstring * g = string_catn(NULL, start, uri-start); + + hname.character = string_from_gstring(g); + hname.length = g->ptr; + if (uri_decode(&hname)==-1) + { + filter->errmsg=US"Invalid URI encoding"; + return -1; + } + } + /* match = */ + if (*uri=='=') + ++uri; + else + { + filter->errmsg=US"Missing equal after hname"; + return -1; + } + /* match hvalue */ + for (start=uri; *uri && (isalnum(*uri) || strchr("$-_.+!*'(),%",*uri)); ++uri); + if (uri>start) + { + gstring * g = string_catn(NULL, start, uri-start); + + hname.character = string_from_gstring(g); + hname.length = g->ptr; + if (uri_decode(&hvalue)==-1) + { + filter->errmsg=US"Invalid URI encoding"; + return -1; + } + } + if (hname.length==2 && strcmpic(hname.character, US"to")==0) + { + new=store_get(sizeof(string_item), GET_UNTAINTED); + new->text = store_get(hvalue.length+1, hvalue.character); + if (hvalue.length) memcpy(new->text, hvalue.character, hvalue.length); + new->text[hvalue.length]='\0'; + new->next=*recipient; + *recipient=new; + } + else if (hname.length==4 && strcmpic(hname.character, US"body")==0) + *body=hvalue; + else if (hname.length==7 && strcmpic(hname.character, US"subject")==0) + *subject=hvalue; + else + { + static struct String ignore[]= + { + {US"date",4}, + {US"from",4}, + {US"message-id",10}, + {US"received",8}, + {US"auto-submitted",14} + }; + static struct String *end=ignore+sizeof(ignore)/sizeof(ignore[0]); + struct String *i; + + for (i=ignore; i<end && !eq_asciicase(&hname,i,0); ++i); + if (i==end) + { + gstring * g; + + if (header->length==-1) header->length = 0; + + g = string_catn(NULL, header->character, header->length); + g = string_catn(g, hname.character, hname.length); + g = string_catn(g, CUS ": ", 2); + g = string_catn(g, hvalue.character, hvalue.length); + g = string_catn(g, CUS "\n", 1); + + header->character = string_from_gstring(g); + header->length = g->ptr; + } + } + if (*uri=='&') ++uri; + else break; + } + } +if (*uri) + { + filter->errmsg=US"Syntactically invalid URI"; + return -1; + } +return 1; +} +#endif + + +/************************************************* +* Octet-wise string comparison * +*************************************************/ + +/* +Arguments: + needle UTF-8 string to search ... + haystack ... inside the haystack + match_prefix 1 to compare if needle is a prefix of haystack + +Returns: 0 needle not found in haystack + 1 needle found +*/ + +static int eq_octet(const struct String *needle, + const struct String *haystack, int match_prefix) +{ +size_t nl,hl; +const uschar *n,*h; + +nl=needle->length; +n=needle->character; +hl=haystack->length; +h=haystack->character; +while (nl>0 && hl>0) + { +#if !HAVE_ICONV + if (*n&0x80) return 0; + if (*h&0x80) return 0; +#endif + if (*n!=*h) return 0; + ++n; + ++h; + --nl; + --hl; + } +return (match_prefix ? nl==0 : nl==0 && hl==0); +} + + +/************************************************* +* ASCII case-insensitive string comparison * +*************************************************/ + +/* +Arguments: + needle UTF-8 string to search ... + haystack ... inside the haystack + match_prefix 1 to compare if needle is a prefix of haystack + +Returns: 0 needle not found in haystack + 1 needle found +*/ + +static int eq_asciicase(const struct String *needle, + const struct String *haystack, int match_prefix) +{ +size_t nl,hl; +const uschar *n,*h; +uschar nc,hc; + +nl=needle->length; +n=needle->character; +hl=haystack->length; +h=haystack->character; +while (nl>0 && hl>0) + { + nc=*n; + hc=*h; +#if !HAVE_ICONV + if (nc&0x80) return 0; + if (hc&0x80) return 0; +#endif + /* tolower depends on the locale and only ASCII case must be insensitive */ + if ((nc>='A' && nc<='Z' ? nc|0x20 : nc) != (hc>='A' && hc<='Z' ? hc|0x20 : hc)) return 0; + ++n; + ++h; + --nl; + --hl; + } +return (match_prefix ? nl==0 : nl==0 && hl==0); +} + + +/************************************************* +* Glob pattern search * +*************************************************/ + +/* +Arguments: + needle pattern to search ... + haystack ... inside the haystack + ascii_caseless ignore ASCII case + match_octet match octets, not UTF-8 multi-octet characters + +Returns: 0 needle not found in haystack + 1 needle found + -1 pattern error +*/ + +static int eq_glob(const struct String *needle, + const struct String *haystack, int ascii_caseless, int match_octet) +{ +const uschar *n,*h,*nend,*hend; +int may_advance=0; + +n=needle->character; +h=haystack->character; +nend=n+needle->length; +hend=h+haystack->length; +while (n<nend) + { + if (*n=='*') + { + ++n; + may_advance=1; + } + else + { + const uschar *npart,*hpart; + + /* Try to match a non-star part of the needle at the current */ + /* position in the haystack. */ + match_part: + npart=n; + hpart=h; + while (npart<nend && *npart!='*') switch (*npart) + { + case '?': + { + if (hpart==hend) return 0; + if (match_octet) + ++hpart; + else + { + /* Match one UTF8 encoded character */ + if ((*hpart&0xc0)==0xc0) + { + ++hpart; + while (hpart<hend && ((*hpart&0xc0)==0x80)) ++hpart; + } + else + ++hpart; + } + ++npart; + break; + } + case '\\': + { + ++npart; + if (npart==nend) return -1; + /* FALLTHROUGH */ + } + default: + { + if (hpart==hend) return 0; + /* tolower depends on the locale, but we need ASCII */ + if + ( +#if !HAVE_ICONV + (*hpart&0x80) || (*npart&0x80) || +#endif + ascii_caseless + ? ((*npart>='A' && *npart<='Z' ? *npart|0x20 : *npart) != (*hpart>='A' && *hpart<='Z' ? *hpart|0x20 : *hpart)) + : *hpart!=*npart + ) + { + if (may_advance) + /* string match after a star failed, advance and try again */ + { + ++h; + goto match_part; + } + else return 0; + } + else + { + ++npart; + ++hpart; + }; + } + } + /* at this point, a part was matched successfully */ + if (may_advance && npart==nend && hpart<hend) + /* needle ends, but haystack does not: if there was a star before, advance and try again */ + { + ++h; + goto match_part; + } + h=hpart; + n=npart; + may_advance=0; + } + } +return (h==hend ? 1 : may_advance); +} + + +/************************************************* +* ASCII numeric comparison * +*************************************************/ + +/* +Arguments: + a first numeric string + b second numeric string + relop relational operator + +Returns: 0 not (a relop b) + 1 a relop b +*/ + +static int eq_asciinumeric(const struct String *a, + const struct String *b, enum RelOp relop) +{ +size_t al,bl; +const uschar *as,*aend,*bs,*bend; +int cmp; + +as=a->character; +aend=a->character+a->length; +bs=b->character; +bend=b->character+b->length; + +while (*as>='0' && *as<='9' && as<aend) ++as; +al=as-a->character; +while (*bs>='0' && *bs<='9' && bs<bend) ++bs; +bl=bs-b->character; + +if (al && bl==0) cmp=-1; +else if (al==0 && bl==0) cmp=0; +else if (al==0 && bl) cmp=1; +else + { + cmp=al-bl; + if (cmp==0) cmp=memcmp(a->character,b->character,al); + } +switch (relop) + { + case LT: return cmp<0; + case LE: return cmp<=0; + case EQ: return cmp==0; + case GE: return cmp>=0; + case GT: return cmp>0; + case NE: return cmp!=0; + } + /*NOTREACHED*/ + return -1; +} + + +/************************************************* +* Compare strings * +*************************************************/ + +/* +Arguments: + filter points to the Sieve filter including its state + needle UTF-8 pattern or string to search ... + haystack ... inside the haystack + co comparator to use + mt match type to use + +Returns: 0 needle not found in haystack + 1 needle found + -1 comparator does not offer matchtype +*/ + +static int compare(struct Sieve *filter, const struct String *needle, const struct String *haystack, + enum Comparator co, enum MatchType mt) +{ +int r=0; + +if ((filter_test != FTEST_NONE && debug_selector != 0) || + (debug_selector & D_filter) != 0) + { + debug_printf("String comparison (match "); + switch (mt) + { + case MATCH_IS: debug_printf(":is"); break; + case MATCH_CONTAINS: debug_printf(":contains"); break; + case MATCH_MATCHES: debug_printf(":matches"); break; + } + debug_printf(", comparison \""); + switch (co) + { + case COMP_OCTET: debug_printf("i;octet"); break; + case COMP_EN_ASCII_CASEMAP: debug_printf("en;ascii-casemap"); break; + case COMP_ASCII_NUMERIC: debug_printf("i;ascii-numeric"); break; + } + debug_printf("\"):\n"); + debug_printf(" Search = %s (%d chars)\n", needle->character,needle->length); + debug_printf(" Inside = %s (%d chars)\n", haystack->character,haystack->length); + } +switch (mt) + { + case MATCH_IS: + switch (co) + { + case COMP_OCTET: + if (eq_octet(needle,haystack,0)) r=1; + break; + case COMP_EN_ASCII_CASEMAP: + if (eq_asciicase(needle,haystack,0)) r=1; + break; + case COMP_ASCII_NUMERIC: + if (!filter->require_iascii_numeric) + { + filter->errmsg=CUS "missing previous require \"comparator-i;ascii-numeric\";"; + return -1; + } + if (eq_asciinumeric(needle,haystack,EQ)) r=1; + break; + } + break; + + case MATCH_CONTAINS: + { + struct String h; + + switch (co) + { + case COMP_OCTET: + for (h = *haystack; h.length; ++h.character,--h.length) + if (eq_octet(needle,&h,1)) { r=1; break; } + break; + case COMP_EN_ASCII_CASEMAP: + for (h = *haystack; h.length; ++h.character, --h.length) + if (eq_asciicase(needle,&h,1)) { r=1; break; } + break; + default: + filter->errmsg=CUS "comparator does not offer specified matchtype"; + return -1; + } + break; + } + + case MATCH_MATCHES: + switch (co) + { + case COMP_OCTET: + if ((r=eq_glob(needle,haystack,0,1))==-1) + { + filter->errmsg=CUS "syntactically invalid pattern"; + return -1; + } + break; + case COMP_EN_ASCII_CASEMAP: + if ((r=eq_glob(needle,haystack,1,1))==-1) + { + filter->errmsg=CUS "syntactically invalid pattern"; + return -1; + } + break; + default: + filter->errmsg=CUS "comparator does not offer specified matchtype"; + return -1; + } + break; + } +if ((filter_test != FTEST_NONE && debug_selector != 0) || + (debug_selector & D_filter) != 0) + debug_printf(" Result %s\n",r?"true":"false"); +return r; +} + + +/************************************************* +* Check header field syntax * +*************************************************/ + +/* +RFC 2822, section 3.6.8 says: + + field-name = 1*ftext + + ftext = %d33-57 / ; Any character except + %d59-126 ; controls, SP, and + ; ":". + +That forbids 8-bit header fields. This implementation accepts them, since +all of Exim is 8-bit clean, so it adds %d128-%d255. + +Arguments: + header header field to quote for suitable use in Exim expansions + +Returns: 0 string is not a valid header field + 1 string is a value header field +*/ + +static int is_header(const struct String *header) +{ +size_t l; +const uschar *h; + +l=header->length; +h=header->character; +if (l==0) return 0; +while (l) + { + if (((unsigned char)*h)<33 || ((unsigned char)*h)==':' || ((unsigned char)*h)==127) return 0; + else + { + ++h; + --l; + } + } +return 1; +} + + +/************************************************* +* Quote special characters string * +*************************************************/ + +/* +Arguments: + header header field to quote for suitable use in Exim expansions + or as debug output + +Returns: quoted string +*/ + +static const uschar * +quote(const struct String *header) +{ +gstring * quoted = NULL; +size_t l; +const uschar *h; + +l=header->length; +h=header->character; +while (l) + { + switch (*h) + { + case '\0': + quoted = string_catn(quoted, CUS "\\0", 2); + break; + case '$': + case '{': + case '}': + quoted = string_catn(quoted, CUS "\\", 1); + default: + quoted = string_catn(quoted, h, 1); + } + ++h; + --l; + } +quoted = string_catn(quoted, CUS "", 1); +return string_from_gstring(quoted); +} + + +/************************************************* +* Add address to list of generated addresses * +*************************************************/ + +/* +According to RFC 5228, duplicate delivery to the same address must +not happen, so the list is first searched for the address. + +Arguments: + generated list of generated addresses + addr new address to add + file address denotes a file + +Returns: nothing +*/ + +static void +add_addr(address_item **generated, uschar *addr, int file, int maxage, int maxmessages, int maxstorage) +{ +address_item *new_addr; + +for (new_addr = *generated; new_addr; new_addr = new_addr->next) + if ( Ustrcmp(new_addr->address,addr) == 0 + && ( !file + || testflag(new_addr, af_pfr) + || testflag(new_addr, af_file) + ) + ) + { + if ((filter_test != FTEST_NONE && debug_selector != 0) || (debug_selector & D_filter) != 0) + debug_printf("Repeated %s `%s' ignored.\n",file ? "fileinto" : "redirect", addr); + + return; + } + +if ((filter_test != FTEST_NONE && debug_selector != 0) || (debug_selector & D_filter) != 0) + debug_printf("%s `%s'\n",file ? "fileinto" : "redirect", addr); + +new_addr = deliver_make_addr(addr,TRUE); +if (file) + { + setflag(new_addr, af_pfr); + setflag(new_addr, af_file); + new_addr->mode = 0; + } +new_addr->prop.errors_address = NULL; +new_addr->next = *generated; +*generated = new_addr; +} + + +/************************************************* +* Return decoded header field * +*************************************************/ + +/* +Unfold the header field as described in RFC 2822 and remove all +leading and trailing white space, then perform MIME decoding and +translate the header field to UTF-8. + +Arguments: + value returned value of the field + header name of the header field + +Returns: nothing The expanded string is empty + in case there is no such header +*/ + +static void expand_header(struct String *value, const struct String *header) +{ +uschar *s,*r,*t; +uschar *errmsg; + +value->length=0; +value->character=(uschar*)0; + +t = r = s = expand_string(string_sprintf("$rheader_%s",quote(header))); +if (!t) return; +while (*r==' ' || *r=='\t') ++r; +while (*r) + { + if (*r=='\n') + ++r; + else + *t++=*r++; + } +while (t>s && (*(t-1)==' ' || *(t-1)=='\t')) --t; +*t='\0'; +value->character=rfc2047_decode(s,check_rfc2047_length,US"utf-8",'\0',&value->length,&errmsg); +} + + +/************************************************* +* Parse remaining hash comment * +*************************************************/ + +/* +Token definition: + Comment up to terminating CRLF + +Arguments: + filter points to the Sieve filter including its state + +Returns: 1 success + -1 syntax error +*/ + +static int parse_hashcomment(struct Sieve *filter) +{ +++filter->pc; +while (*filter->pc) + { +#ifdef RFC_EOL + if (*filter->pc=='\r' && *(filter->pc+1)=='\n') +#else + if (*filter->pc=='\n') +#endif + { +#ifdef RFC_EOL + filter->pc+=2; +#else + ++filter->pc; +#endif + ++filter->line; + return 1; + } + else ++filter->pc; + } +filter->errmsg=CUS "missing end of comment"; +return -1; +} + + +/************************************************* +* Parse remaining C-style comment * +*************************************************/ + +/* +Token definition: + Everything up to star slash + +Arguments: + filter points to the Sieve filter including its state + +Returns: 1 success + -1 syntax error +*/ + +static int parse_comment(struct Sieve *filter) +{ + filter->pc+=2; + while (*filter->pc) + { + if (*filter->pc=='*' && *(filter->pc+1)=='/') + { + filter->pc+=2; + return 1; + } + else ++filter->pc; + } + filter->errmsg=CUS "missing end of comment"; + return -1; +} + + +/************************************************* +* Parse optional white space * +*************************************************/ + +/* +Token definition: + Spaces, tabs, CRLFs, hash comments or C-style comments + +Arguments: + filter points to the Sieve filter including its state + +Returns: 1 success + -1 syntax error +*/ + +static int parse_white(struct Sieve *filter) +{ +while (*filter->pc) + { + if (*filter->pc==' ' || *filter->pc=='\t') ++filter->pc; +#ifdef RFC_EOL + else if (*filter->pc=='\r' && *(filter->pc+1)=='\n') +#else + else if (*filter->pc=='\n') +#endif + { +#ifdef RFC_EOL + filter->pc+=2; +#else + ++filter->pc; +#endif + ++filter->line; + } + else if (*filter->pc=='#') + { + if (parse_hashcomment(filter)==-1) return -1; + } + else if (*filter->pc=='/' && *(filter->pc+1)=='*') + { + if (parse_comment(filter)==-1) return -1; + } + else break; + } +return 1; +} + + +#ifdef ENCODED_CHARACTER +/************************************************* +* Decode hex-encoded-character string * +*************************************************/ + +/* +Encoding definition: + blank = SP / TAB / CRLF + hex-pair-seq = *blank hex-pair *(1*blank hex-pair) *blank + hex-pair = 1*2HEXDIG + +Arguments: + src points to a hex-pair-seq + end points to its end + dst points to the destination of the decoded octets, + optionally to (uschar*)0 for checking only + +Returns: >=0 number of decoded octets + -1 syntax error +*/ + +static int hex_decode(uschar *src, uschar *end, uschar *dst) +{ +int decoded=0; + +while (*src==' ' || *src=='\t' || *src=='\n') ++src; +do + { + int x,d,n; + + for (x = 0, d = 0; + d<2 && src<end && isxdigit(n=tolower(*src)); + x=(x<<4)|(n>='0' && n<='9' ? n-'0' : 10+(n-'a')) ,++d, ++src) ; + if (d==0) return -1; + if (dst) *dst++=x; + ++decoded; + if (src==end) return decoded; + if (*src==' ' || *src=='\t' || *src=='\n') + while (*src==' ' || *src=='\t' || *src=='\n') ++src; + else + return -1; + } +while (src<end); +return decoded; +} + + +/************************************************* +* Decode unicode-encoded-character string * +*************************************************/ + +/* +Encoding definition: + blank = SP / TAB / CRLF + unicode-hex-seq = *blank unicode-hex *(blank unicode-hex) *blank + unicode-hex = 1*HEXDIG + + It is an error for a script to use a hexadecimal value that isn't in + either the range 0 to D7FF or the range E000 to 10FFFF. + + At this time, strings are already scanned, thus the CRLF is converted + to the internally used \n (should RFC_EOL have been used). + +Arguments: + src points to a unicode-hex-seq + end points to its end + dst points to the destination of the decoded octets, + optionally to (uschar*)0 for checking only + +Returns: >=0 number of decoded octets + -1 syntax error + -2 semantic error (character range violation) +*/ + +static int +unicode_decode(uschar *src, uschar *end, uschar *dst) +{ +int decoded=0; + +while (*src==' ' || *src=='\t' || *src=='\n') ++src; +do + { + uschar *hex_seq; + int c,d,n; + + unicode_hex: + for (hex_seq = src; src < end && *src=='0'; ) src++; + for (c = 0, d = 0; + d < 7 && src < end && isxdigit(n=tolower(*src)); + c=(c<<4)|(n>='0' && n<='9' ? n-'0' : 10+(n-'a')), ++d, ++src) ; + if (src == hex_seq) return -1; + if (d==7 || (!((c>=0 && c<=0xd7ff) || (c>=0xe000 && c<=0x10ffff)))) return -2; + if (c<128) + { + if (dst) *dst++=c; + ++decoded; + } + else if (c>=0x80 && c<=0x7ff) + { + if (dst) + { + *dst++=192+(c>>6); + *dst++=128+(c&0x3f); + } + decoded+=2; + } + else if (c>=0x800 && c<=0xffff) + { + if (dst) + { + *dst++=224+(c>>12); + *dst++=128+((c>>6)&0x3f); + *dst++=128+(c&0x3f); + } + decoded+=3; + } + else if (c>=0x10000 && c<=0x1fffff) + { + if (dst) + { + *dst++=240+(c>>18); + *dst++=128+((c>>10)&0x3f); + *dst++=128+((c>>6)&0x3f); + *dst++=128+(c&0x3f); + } + decoded+=4; + } + if (*src==' ' || *src=='\t' || *src=='\n') + { + while (*src==' ' || *src=='\t' || *src=='\n') ++src; + if (src==end) return decoded; + goto unicode_hex; + } + } +while (src<end); +return decoded; +} + + +/************************************************* +* Decode encoded-character string * +*************************************************/ + +/* +Encoding definition: + encoded-arb-octets = "${hex:" hex-pair-seq "}" + encoded-unicode-char = "${unicode:" unicode-hex-seq "}" + +Arguments: + encoded points to an encoded string, returns decoded string + filter points to the Sieve filter including its state + +Returns: 1 success + -1 syntax error +*/ + +static int string_decode(struct Sieve *filter, struct String *data) +{ +uschar *src,*dst,*end; + +src=data->character; +dst=src; +end=data->character+data->length; +while (src<end) + { + uschar *brace; + + if ( + strncmpic(src,US "${hex:",6)==0 + && (brace=Ustrchr(src+6,'}'))!=(uschar*)0 + && (hex_decode(src+6,brace,(uschar*)0))>=0 + ) + { + dst+=hex_decode(src+6,brace,dst); + src=brace+1; + } + else if ( + strncmpic(src,US "${unicode:",10)==0 + && (brace=Ustrchr(src+10,'}'))!=(uschar*)0 + ) + { + switch (unicode_decode(src+10,brace,(uschar*)0)) + { + case -2: + { + filter->errmsg=CUS "unicode character out of range"; + return -1; + } + case -1: + { + *dst++=*src++; + break; + } + default: + { + dst+=unicode_decode(src+10,brace,dst); + src=brace+1; + } + } + } + else *dst++=*src++; + } + data->length=dst-data->character; + *dst='\0'; +return 1; +} +#endif + + +/************************************************* +* Parse an optional string * +*************************************************/ + +/* +Token definition: + quoted-string = DQUOTE *CHAR DQUOTE + ;; in general, \ CHAR inside a string maps to CHAR + ;; so \" maps to " and \\ maps to \ + ;; note that newlines and other characters are all allowed + ;; in strings + + multi-line = "text:" *(SP / HTAB) (hash-comment / CRLF) + *(multi-line-literal / multi-line-dotstuff) + "." CRLF + multi-line-literal = [CHAR-NOT-DOT *CHAR-NOT-CRLF] CRLF + multi-line-dotstuff = "." 1*CHAR-NOT-CRLF CRLF + ;; A line containing only "." ends the multi-line. + ;; Remove a leading '.' if followed by another '.'. + string = quoted-string / multi-line + +Arguments: + filter points to the Sieve filter including its state + id specifies identifier to match + +Returns: 1 success + -1 syntax error + 0 identifier not matched +*/ + +static int +parse_string(struct Sieve *filter, struct String *data) +{ +gstring * g = NULL; + +data->length = 0; +data->character = NULL; + +if (*filter->pc=='"') /* quoted string */ + { + ++filter->pc; + while (*filter->pc) + { + if (*filter->pc=='"') /* end of string */ + { + ++filter->pc; + + if (g) + { + data->character = string_from_gstring(g); + data->length = g->ptr; + } + else + data->character = US"\0"; + /* that way, there will be at least one character allocated */ + +#ifdef ENCODED_CHARACTER + if (filter->require_encoded_character + && string_decode(filter,data)==-1) + return -1; +#endif + return 1; + } + else if (*filter->pc=='\\' && *(filter->pc+1)) /* quoted character */ + { + g = string_catn(g, filter->pc+1, 1); + filter->pc+=2; + } + else /* regular character */ + { +#ifdef RFC_EOL + if (*filter->pc=='\r' && *(filter->pc+1)=='\n') ++filter->line; +#else + if (*filter->pc=='\n') + { + g = string_catn(g, US"\r", 1); + ++filter->line; + } +#endif + g = string_catn(g, filter->pc, 1); + filter->pc++; + } + } + filter->errmsg=CUS "missing end of string"; + return -1; + } +else if (Ustrncmp(filter->pc,CUS "text:",5)==0) /* multiline string */ + { + filter->pc+=5; + /* skip optional white space followed by hashed comment or CRLF */ + while (*filter->pc==' ' || *filter->pc=='\t') ++filter->pc; + if (*filter->pc=='#') + { + if (parse_hashcomment(filter)==-1) return -1; + } +#ifdef RFC_EOL + else if (*filter->pc=='\r' && *(filter->pc+1)=='\n') +#else + else if (*filter->pc=='\n') +#endif + { +#ifdef RFC_EOL + filter->pc+=2; +#else + ++filter->pc; +#endif + ++filter->line; + } + else + { + filter->errmsg=CUS "syntax error"; + return -1; + } + while (*filter->pc) + { +#ifdef RFC_EOL + if (*filter->pc=='\r' && *(filter->pc+1)=='\n') /* end of line */ +#else + if (*filter->pc=='\n') /* end of line */ +#endif + { + g = string_catn(g, CUS "\r\n", 2); +#ifdef RFC_EOL + filter->pc+=2; +#else + ++filter->pc; +#endif + ++filter->line; +#ifdef RFC_EOL + if (*filter->pc=='.' && *(filter->pc+1)=='\r' && *(filter->pc+2)=='\n') /* end of string */ +#else + if (*filter->pc=='.' && *(filter->pc+1)=='\n') /* end of string */ +#endif + { + if (g) + { + data->character = string_from_gstring(g); + data->length = g->ptr; + } + else + data->character = US"\0"; + /* that way, there will be at least one character allocated */ + +#ifdef RFC_EOL + filter->pc+=3; +#else + filter->pc+=2; +#endif + ++filter->line; +#ifdef ENCODED_CHARACTER + if (filter->require_encoded_character + && string_decode(filter,data)==-1) + return -1; +#endif + return 1; + } + else if (*filter->pc=='.' && *(filter->pc+1)=='.') /* remove dot stuffing */ + { + g = string_catn(g, CUS ".", 1); + filter->pc+=2; + } + } + else /* regular character */ + { + g = string_catn(g, filter->pc, 1); + filter->pc++; + } + } + filter->errmsg=CUS "missing end of multi line string"; + return -1; + } +else return 0; +} + + +/************************************************* +* Parse a specific identifier * +*************************************************/ + +/* +Token definition: + identifier = (ALPHA / "_") *(ALPHA DIGIT "_") + +Arguments: + filter points to the Sieve filter including its state + id specifies identifier to match + +Returns: 1 success + 0 identifier not matched +*/ + +static int parse_identifier(struct Sieve *filter, const uschar *id) +{ + size_t idlen=Ustrlen(id); + + if (strncmpic(US filter->pc,US id,idlen)==0) + { + uschar next=filter->pc[idlen]; + + if ((next>='A' && next<='Z') || (next>='a' && next<='z') || next=='_' || (next>='0' && next<='9')) return 0; + filter->pc+=idlen; + return 1; + } + else return 0; +} + + +/************************************************* +* Parse a number * +*************************************************/ + +/* +Token definition: + number = 1*DIGIT [QUANTIFIER] + QUANTIFIER = "K" / "M" / "G" + +Arguments: + filter points to the Sieve filter including its state + data returns value + +Returns: 1 success + -1 no string list found +*/ + +static int parse_number(struct Sieve *filter, unsigned long *data) +{ +unsigned long d,u; + +if (*filter->pc>='0' && *filter->pc<='9') + { + uschar *e; + + errno=0; + d=Ustrtoul(filter->pc,&e,10); + if (errno==ERANGE) + { + filter->errmsg=CUstrerror(ERANGE); + return -1; + } + filter->pc=e; + u=1; + if (*filter->pc=='K') { u=1024; ++filter->pc; } + else if (*filter->pc=='M') { u=1024*1024; ++filter->pc; } + else if (*filter->pc=='G') { u=1024*1024*1024; ++filter->pc; } + if (d>(ULONG_MAX/u)) + { + filter->errmsg=CUstrerror(ERANGE); + return -1; + } + d*=u; + *data=d; + return 1; + } +else + { + filter->errmsg=CUS "missing number"; + return -1; + } +} + + +/************************************************* +* Parse a string list * +*************************************************/ + +/* +Grammar: + string-list = "[" string *("," string) "]" / string + +Arguments: + filter points to the Sieve filter including its state + data returns string list + +Returns: 1 success + -1 no string list found +*/ + +static int +parse_stringlist(struct Sieve *filter, struct String **data) +{ +const uschar *orig=filter->pc; +int dataCapacity = 0; +int dataLength = 0; +struct String *d = NULL; +int m; + +if (*filter->pc=='[') /* string list */ + { + ++filter->pc; + for (;;) + { + if (parse_white(filter)==-1) goto error; + if (dataLength+1 >= dataCapacity) /* increase buffer */ + { + struct String *new; + + dataCapacity = dataCapacity ? dataCapacity * 2 : 4; + new = store_get(sizeof(struct String) * dataCapacity, GET_UNTAINTED); + + if (d) memcpy(new,d,sizeof(struct String)*dataLength); + d = new; + } + + m=parse_string(filter,&d[dataLength]); + if (m==0) + { + if (dataLength==0) break; + else + { + filter->errmsg=CUS "missing string"; + goto error; + } + } + else if (m==-1) goto error; + else ++dataLength; + if (parse_white(filter)==-1) goto error; + if (*filter->pc==',') ++filter->pc; + else break; + } + if (*filter->pc==']') + { + d[dataLength].character=(uschar*)0; + d[dataLength].length=-1; + ++filter->pc; + *data=d; + return 1; + } + else + { + filter->errmsg=CUS "missing closing bracket"; + goto error; + } + } +else /* single string */ + { + if (!(d=store_get(sizeof(struct String)*2, GET_UNTAINTED))) + return -1; + + m=parse_string(filter,&d[0]); + if (m==-1) + return -1; + + else if (m==0) + { + filter->pc=orig; + return 0; + } + else + { + d[1].character=(uschar*)0; + d[1].length=-1; + *data=d; + return 1; + } + } +error: +filter->errmsg=CUS "missing string list"; +return -1; +} + + +/************************************************* +* Parse an optional address part specifier * +*************************************************/ + +/* +Grammar: + address-part = ":localpart" / ":domain" / ":all" + address-part =/ ":user" / ":detail" + +Arguments: + filter points to the Sieve filter including its state + a returns address part specified + +Returns: 1 success + 0 no comparator found + -1 syntax error +*/ + +static int parse_addresspart(struct Sieve *filter, enum AddressPart *a) +{ +#ifdef SUBADDRESS +if (parse_identifier(filter,CUS ":user")==1) + { + if (!filter->require_subaddress) + { + filter->errmsg=CUS "missing previous require \"subaddress\";"; + return -1; + } + *a=ADDRPART_USER; + return 1; + } +else if (parse_identifier(filter,CUS ":detail")==1) + { + if (!filter->require_subaddress) + { + filter->errmsg=CUS "missing previous require \"subaddress\";"; + return -1; + } + *a=ADDRPART_DETAIL; + return 1; + } +else +#endif +if (parse_identifier(filter,CUS ":localpart")==1) + { + *a=ADDRPART_LOCALPART; + return 1; + } +else if (parse_identifier(filter,CUS ":domain")==1) + { + *a=ADDRPART_DOMAIN; + return 1; + } +else if (parse_identifier(filter,CUS ":all")==1) + { + *a=ADDRPART_ALL; + return 1; + } +else return 0; +} + + +/************************************************* +* Parse an optional comparator * +*************************************************/ + +/* +Grammar: + comparator = ":comparator" <comparator-name: string> + +Arguments: + filter points to the Sieve filter including its state + c returns comparator + +Returns: 1 success + 0 no comparator found + -1 incomplete comparator found +*/ + +static int parse_comparator(struct Sieve *filter, enum Comparator *c) +{ +struct String comparator_name; + +if (parse_identifier(filter,CUS ":comparator")==0) return 0; +if (parse_white(filter)==-1) return -1; +switch (parse_string(filter,&comparator_name)) + { + case -1: return -1; + case 0: + { + filter->errmsg=CUS "missing comparator"; + return -1; + } + default: + { + int match; + + if (eq_asciicase(&comparator_name,&str_ioctet,0)) + { + *c=COMP_OCTET; + match=1; + } + else if (eq_asciicase(&comparator_name,&str_iascii_casemap,0)) + { + *c=COMP_EN_ASCII_CASEMAP; + match=1; + } + else if (eq_asciicase(&comparator_name,&str_enascii_casemap,0)) + { + *c=COMP_EN_ASCII_CASEMAP; + match=1; + } + else if (eq_asciicase(&comparator_name,&str_iascii_numeric,0)) + { + *c=COMP_ASCII_NUMERIC; + match=1; + } + else + { + filter->errmsg=CUS "invalid comparator"; + match=-1; + } + return match; + } + } +} + + +/************************************************* +* Parse an optional match type * +*************************************************/ + +/* +Grammar: + match-type = ":is" / ":contains" / ":matches" + +Arguments: + filter points to the Sieve filter including its state + m returns match type + +Returns: 1 success + 0 no match type found +*/ + +static int parse_matchtype(struct Sieve *filter, enum MatchType *m) +{ + if (parse_identifier(filter,CUS ":is")==1) + { + *m=MATCH_IS; + return 1; + } + else if (parse_identifier(filter,CUS ":contains")==1) + { + *m=MATCH_CONTAINS; + return 1; + } + else if (parse_identifier(filter,CUS ":matches")==1) + { + *m=MATCH_MATCHES; + return 1; + } + else return 0; +} + + +/************************************************* +* Parse and interpret an optional test list * +*************************************************/ + +/* +Grammar: + test-list = "(" test *("," test) ")" + +Arguments: + filter points to the Sieve filter including its state + n total number of tests + num_true number of passed tests + exec Execute parsed statements + +Returns: 1 success + 0 no test list found + -1 syntax or execution error +*/ + +static int parse_testlist(struct Sieve *filter, int *n, int *num_true, int exec) +{ +if (parse_white(filter)==-1) return -1; +if (*filter->pc=='(') + { + ++filter->pc; + *n=0; + *num_true=0; + for (;;) + { + int cond; + + switch (parse_test(filter,&cond,exec)) + { + case -1: return -1; + case 0: filter->errmsg=CUS "missing test"; return -1; + default: ++*n; if (cond) ++*num_true; break; + } + if (parse_white(filter)==-1) return -1; + if (*filter->pc==',') ++filter->pc; + else break; + } + if (*filter->pc==')') + { + ++filter->pc; + return 1; + } + else + { + filter->errmsg=CUS "missing closing paren"; + return -1; + } + } +else return 0; +} + + +/************************************************* +* Parse and interpret an optional test * +*************************************************/ + +/* +Arguments: + filter points to the Sieve filter including its state + cond returned condition status + exec Execute parsed statements + +Returns: 1 success + 0 no test found + -1 syntax or execution error +*/ + +static int +parse_test(struct Sieve *filter, int *cond, int exec) +{ +if (parse_white(filter)==-1) return -1; +if (parse_identifier(filter,CUS "address")) + { + /* + address-test = "address" { [address-part] [comparator] [match-type] } + <header-list: string-list> <key-list: string-list> + + header-list From, To, Cc, Bcc, Sender, Resent-From, Resent-To + */ + + enum AddressPart addressPart=ADDRPART_ALL; + enum Comparator comparator=COMP_EN_ASCII_CASEMAP; + enum MatchType matchType=MATCH_IS; + struct String *hdr,*key; + int m; + int ap=0,co=0,mt=0; + + for (;;) + { + if (parse_white(filter)==-1) return -1; + if ((m=parse_addresspart(filter,&addressPart))!=0) + { + if (m==-1) return -1; + if (ap) + { + filter->errmsg=CUS "address part already specified"; + return -1; + } + else ap=1; + } + else if ((m=parse_comparator(filter,&comparator))!=0) + { + if (m==-1) return -1; + if (co) + { + filter->errmsg=CUS "comparator already specified"; + return -1; + } + else co=1; + } + else if ((m=parse_matchtype(filter,&matchType))!=0) + { + if (m==-1) return -1; + if (mt) + { + filter->errmsg=CUS "match type already specified"; + return -1; + } + else mt=1; + } + else break; + } + if (parse_white(filter)==-1) return -1; + if ((m=parse_stringlist(filter,&hdr))!=1) + { + if (m==0) filter->errmsg=CUS "header string list expected"; + return -1; + } + if (parse_white(filter)==-1) return -1; + if ((m=parse_stringlist(filter,&key))!=1) + { + if (m==0) filter->errmsg=CUS "key string list expected"; + return -1; + } + *cond=0; + for (struct String * h = hdr; h->length!=-1 && !*cond; ++h) + { + uschar *header_value=(uschar*)0,*extracted_addr,*end_addr; + + if + ( + !eq_asciicase(h,&str_from,0) + && !eq_asciicase(h,&str_to,0) + && !eq_asciicase(h,&str_cc,0) + && !eq_asciicase(h,&str_bcc,0) + && !eq_asciicase(h,&str_sender,0) + && !eq_asciicase(h,&str_resent_from,0) + && !eq_asciicase(h,&str_resent_to,0) + ) + { + filter->errmsg=CUS "invalid header field"; + return -1; + } + if (exec) + { + /* We are only interested in addresses below, so no MIME decoding */ + if (!(header_value = expand_string(string_sprintf("$rheader_%s",quote(h))))) + { + filter->errmsg=CUS "header string expansion failed"; + return -1; + } + f.parse_allow_group = TRUE; + while (*header_value && !*cond) + { + uschar *error; + int start, end, domain; + int saveend; + uschar *part=NULL; + + end_addr = parse_find_address_end(header_value, FALSE); + saveend = *end_addr; + *end_addr = 0; + extracted_addr = parse_extract_address(header_value, &error, &start, &end, &domain, FALSE); + + if (extracted_addr) switch (addressPart) + { + case ADDRPART_ALL: part=extracted_addr; break; +#ifdef SUBADDRESS + case ADDRPART_USER: +#endif + case ADDRPART_LOCALPART: part=extracted_addr; part[domain-1]='\0'; break; + case ADDRPART_DOMAIN: part=extracted_addr+domain; break; +#ifdef SUBADDRESS + case ADDRPART_DETAIL: part=NULL; break; +#endif + } + + *end_addr = saveend; + if (part) + { + for (struct String * k = key; k->length !=- 1; ++k) + { + struct String partStr = {.character = part, .length = Ustrlen(part)}; + + if (extracted_addr) + { + *cond=compare(filter,k,&partStr,comparator,matchType); + if (*cond==-1) return -1; + if (*cond) break; + } + } + } + if (saveend == 0) break; + header_value = end_addr + 1; + } + f.parse_allow_group = FALSE; + f.parse_found_group = FALSE; + } + } + return 1; + } +else if (parse_identifier(filter,CUS "allof")) + { + /* + allof-test = "allof" <tests: test-list> + */ + + int n,num_true; + + switch (parse_testlist(filter,&n,&num_true,exec)) + { + case -1: return -1; + case 0: filter->errmsg=CUS "missing test list"; return -1; + default: *cond=(n==num_true); return 1; + } + } +else if (parse_identifier(filter,CUS "anyof")) + { + /* + anyof-test = "anyof" <tests: test-list> + */ + + int n,num_true; + + switch (parse_testlist(filter,&n,&num_true,exec)) + { + case -1: return -1; + case 0: filter->errmsg=CUS "missing test list"; return -1; + default: *cond=(num_true>0); return 1; + } + } +else if (parse_identifier(filter,CUS "exists")) + { + /* + exists-test = "exists" <header-names: string-list> + */ + + struct String *hdr; + int m; + + if (parse_white(filter)==-1) return -1; + if ((m=parse_stringlist(filter,&hdr))!=1) + { + if (m==0) filter->errmsg=CUS "header string list expected"; + return -1; + } + if (exec) + { + *cond=1; + for (struct String * h = hdr; h->length != -1 && *cond; ++h) + { + uschar *header_def; + + header_def = expand_string(string_sprintf("${if def:header_%s {true}{false}}",quote(h))); + if (!header_def) + { + filter->errmsg=CUS "header string expansion failed"; + return -1; + } + if (Ustrcmp(header_def,"false")==0) *cond=0; + } + } + return 1; + } +else if (parse_identifier(filter,CUS "false")) + { + /* + false-test = "false" + */ + + *cond=0; + return 1; + } +else if (parse_identifier(filter,CUS "header")) + { + /* + header-test = "header" { [comparator] [match-type] } + <header-names: string-list> <key-list: string-list> + */ + + enum Comparator comparator=COMP_EN_ASCII_CASEMAP; + enum MatchType matchType=MATCH_IS; + struct String *hdr,*key; + int m; + int co=0,mt=0; + + for (;;) + { + if (parse_white(filter)==-1) return -1; + if ((m=parse_comparator(filter,&comparator))!=0) + { + if (m==-1) return -1; + if (co) + { + filter->errmsg=CUS "comparator already specified"; + return -1; + } + else co=1; + } + else if ((m=parse_matchtype(filter,&matchType))!=0) + { + if (m==-1) return -1; + if (mt) + { + filter->errmsg=CUS "match type already specified"; + return -1; + } + else mt=1; + } + else break; + } + if (parse_white(filter)==-1) return -1; + if ((m=parse_stringlist(filter,&hdr))!=1) + { + if (m==0) filter->errmsg=CUS "header string list expected"; + return -1; + } + if (parse_white(filter)==-1) return -1; + if ((m=parse_stringlist(filter,&key))!=1) + { + if (m==0) filter->errmsg=CUS "key string list expected"; + return -1; + } + *cond=0; + for (struct String * h = hdr; h->length != -1 && !*cond; ++h) + { + if (!is_header(h)) + { + filter->errmsg=CUS "invalid header field"; + return -1; + } + if (exec) + { + struct String header_value; + uschar *header_def; + + expand_header(&header_value,h); + header_def = expand_string(string_sprintf("${if def:header_%s {true}{false}}",quote(h))); + if (!header_value.character || !header_def) + { + filter->errmsg=CUS "header string expansion failed"; + return -1; + } + for (struct String * k = key; k->length != -1; ++k) + if (Ustrcmp(header_def,"true")==0) + { + *cond=compare(filter,k,&header_value,comparator,matchType); + if (*cond==-1) return -1; + if (*cond) break; + } + } + } + return 1; + } +else if (parse_identifier(filter,CUS "not")) + { + if (parse_white(filter)==-1) return -1; + switch (parse_test(filter,cond,exec)) + { + case -1: return -1; + case 0: filter->errmsg=CUS "missing test"; return -1; + default: *cond=!*cond; return 1; + } + } +else if (parse_identifier(filter,CUS "size")) + { + /* + relop = ":over" / ":under" + size-test = "size" relop <limit: number> + */ + + unsigned long limit; + int overNotUnder; + + if (parse_white(filter)==-1) return -1; + if (parse_identifier(filter,CUS ":over")) overNotUnder=1; + else if (parse_identifier(filter,CUS ":under")) overNotUnder=0; + else + { + filter->errmsg=CUS "missing :over or :under"; + return -1; + } + if (parse_white(filter)==-1) return -1; + if (parse_number(filter,&limit)==-1) return -1; + *cond=(overNotUnder ? (message_size>limit) : (message_size<limit)); + return 1; + } +else if (parse_identifier(filter,CUS "true")) + { + *cond=1; + return 1; + } +else if (parse_identifier(filter,CUS "envelope")) + { + /* + envelope-test = "envelope" { [comparator] [address-part] [match-type] } + <envelope-part: string-list> <key-list: string-list> + + envelope-part is case insensitive "from" or "to" +#ifdef ENVELOPE_AUTH + envelope-part =/ "auth" +#endif + */ + + enum Comparator comparator=COMP_EN_ASCII_CASEMAP; + enum AddressPart addressPart=ADDRPART_ALL; + enum MatchType matchType=MATCH_IS; + struct String *env,*key; + int m; + int co=0,ap=0,mt=0; + + if (!filter->require_envelope) + { + filter->errmsg=CUS "missing previous require \"envelope\";"; + return -1; + } + for (;;) + { + if (parse_white(filter)==-1) return -1; + if ((m=parse_comparator(filter,&comparator))!=0) + { + if (m==-1) return -1; + if (co) + { + filter->errmsg=CUS "comparator already specified"; + return -1; + } + else co=1; + } + else if ((m=parse_addresspart(filter,&addressPart))!=0) + { + if (m==-1) return -1; + if (ap) + { + filter->errmsg=CUS "address part already specified"; + return -1; + } + else ap=1; + } + else if ((m=parse_matchtype(filter,&matchType))!=0) + { + if (m==-1) return -1; + if (mt) + { + filter->errmsg=CUS "match type already specified"; + return -1; + } + else mt=1; + } + else break; + } + if (parse_white(filter)==-1) return -1; + if ((m=parse_stringlist(filter,&env))!=1) + { + if (m==0) filter->errmsg=CUS "envelope string list expected"; + return -1; + } + if (parse_white(filter)==-1) return -1; + if ((m=parse_stringlist(filter,&key))!=1) + { + if (m==0) filter->errmsg=CUS "key string list expected"; + return -1; + } + *cond=0; + for (struct String * e = env; e->length != -1 && !*cond; ++e) + { + const uschar *envelopeExpr=CUS 0; + uschar *envelope=US 0; + + if (eq_asciicase(e,&str_from,0)) + { + switch (addressPart) + { + case ADDRPART_ALL: envelopeExpr=CUS "$sender_address"; break; +#ifdef SUBADDRESS + case ADDRPART_USER: +#endif + case ADDRPART_LOCALPART: envelopeExpr=CUS "${local_part:$sender_address}"; break; + case ADDRPART_DOMAIN: envelopeExpr=CUS "${domain:$sender_address}"; break; +#ifdef SUBADDRESS + case ADDRPART_DETAIL: envelopeExpr=CUS 0; break; +#endif + } + } + else if (eq_asciicase(e,&str_to,0)) + { + switch (addressPart) + { + case ADDRPART_ALL: envelopeExpr=CUS "$local_part_prefix$local_part$local_part_suffix@$domain"; break; +#ifdef SUBADDRESS + case ADDRPART_USER: envelopeExpr=filter->useraddress; break; + case ADDRPART_DETAIL: envelopeExpr=filter->subaddress; break; +#endif + case ADDRPART_LOCALPART: envelopeExpr=CUS "$local_part_prefix$local_part$local_part_suffix"; break; + case ADDRPART_DOMAIN: envelopeExpr=CUS "$domain"; break; + } + } +#ifdef ENVELOPE_AUTH + else if (eq_asciicase(e,&str_auth,0)) + { + switch (addressPart) + { + case ADDRPART_ALL: envelopeExpr=CUS "$authenticated_sender"; break; +#ifdef SUBADDRESS + case ADDRPART_USER: +#endif + case ADDRPART_LOCALPART: envelopeExpr=CUS "${local_part:$authenticated_sender}"; break; + case ADDRPART_DOMAIN: envelopeExpr=CUS "${domain:$authenticated_sender}"; break; +#ifdef SUBADDRESS + case ADDRPART_DETAIL: envelopeExpr=CUS 0; break; +#endif + } + } +#endif + else + { + filter->errmsg=CUS "invalid envelope string"; + return -1; + } + if (exec && envelopeExpr) + { + if (!(envelope=expand_string(US envelopeExpr))) + { + filter->errmsg=CUS "header string expansion failed"; + return -1; + } + for (struct String * k = key; k->length != -1; ++k) + { + struct String envelopeStr = {.character = envelope, .length = Ustrlen(envelope)}; + + *cond=compare(filter,k,&envelopeStr,comparator,matchType); + if (*cond==-1) return -1; + if (*cond) break; + } + } + } + return 1; + } +#ifdef ENOTIFY +else if (parse_identifier(filter,CUS "valid_notify_method")) + { + /* + valid_notify_method = "valid_notify_method" + <notification-uris: string-list> + */ + + struct String *uris; + int m; + + if (!filter->require_enotify) + { + filter->errmsg=CUS "missing previous require \"enotify\";"; + return -1; + } + if (parse_white(filter)==-1) return -1; + if ((m=parse_stringlist(filter,&uris))!=1) + { + if (m==0) filter->errmsg=CUS "URI string list expected"; + return -1; + } + if (exec) + { + *cond=1; + for (struct String * u = uris; u->length != -1 && *cond; ++u) + { + string_item *recipient; + struct String header,subject,body; + + recipient=NULL; + header.length=-1; + header.character=(uschar*)0; + subject.length=-1; + subject.character=(uschar*)0; + body.length=-1; + body.character=(uschar*)0; + if (parse_mailto_uri(filter,u->character,&recipient,&header,&subject,&body)!=1) + *cond=0; + } + } + return 1; + } +else if (parse_identifier(filter,CUS "notify_method_capability")) + { + /* + notify_method_capability = "notify_method_capability" [COMPARATOR] [MATCH-TYPE] + <notification-uri: string> + <notification-capability: string> + <key-list: string-list> + */ + + int m; + int co=0,mt=0; + + enum Comparator comparator=COMP_EN_ASCII_CASEMAP; + enum MatchType matchType=MATCH_IS; + struct String uri,capa,*keys; + + if (!filter->require_enotify) + { + filter->errmsg=CUS "missing previous require \"enotify\";"; + return -1; + } + for (;;) + { + if (parse_white(filter)==-1) return -1; + if ((m=parse_comparator(filter,&comparator))!=0) + { + if (m==-1) return -1; + if (co) + { + filter->errmsg=CUS "comparator already specified"; + return -1; + } + else co=1; + } + else if ((m=parse_matchtype(filter,&matchType))!=0) + { + if (m==-1) return -1; + if (mt) + { + filter->errmsg=CUS "match type already specified"; + return -1; + } + else mt=1; + } + else break; + } + if ((m=parse_string(filter,&uri))!=1) + { + if (m==0) filter->errmsg=CUS "missing notification URI string"; + return -1; + } + if (parse_white(filter)==-1) return -1; + if ((m=parse_string(filter,&capa))!=1) + { + if (m==0) filter->errmsg=CUS "missing notification capability string"; + return -1; + } + if (parse_white(filter)==-1) return -1; + if ((m=parse_stringlist(filter,&keys))!=1) + { + if (m==0) filter->errmsg=CUS "missing key string list"; + return -1; + } + if (exec) + { + string_item *recipient; + struct String header,subject,body; + + *cond=0; + recipient=NULL; + header.length=-1; + header.character=(uschar*)0; + subject.length=-1; + subject.character=(uschar*)0; + body.length=-1; + body.character=(uschar*)0; + if (parse_mailto_uri(filter,uri.character,&recipient,&header,&subject,&body)==1) + if (eq_asciicase(&capa,&str_online,0)==1) + for (struct String * k = keys; k->length != -1; ++k) + { + *cond=compare(filter,k,&str_maybe,comparator,matchType); + if (*cond==-1) return -1; + if (*cond) break; + } + } + return 1; + } +#endif +else return 0; +} + + +/************************************************* +* Parse and interpret an optional block * +*************************************************/ + +/* +Arguments: + filter points to the Sieve filter including its state + exec Execute parsed statements + generated where to hang newly-generated addresses + +Returns: 2 success by stop + 1 other success + 0 no block command found + -1 syntax or execution error +*/ + +static int parse_block(struct Sieve *filter, int exec, + address_item **generated) +{ +int r; + +if (parse_white(filter)==-1) return -1; +if (*filter->pc=='{') + { + ++filter->pc; + if ((r=parse_commands(filter,exec,generated))==-1 || r==2) return r; + if (*filter->pc=='}') + { + ++filter->pc; + return 1; + } + else + { + filter->errmsg=CUS "expecting command or closing brace"; + return -1; + } + } +else return 0; +} + + +/************************************************* +* Match a semicolon * +*************************************************/ + +/* +Arguments: + filter points to the Sieve filter including its state + +Returns: 1 success + -1 syntax error +*/ + +static int parse_semicolon(struct Sieve *filter) +{ + if (parse_white(filter)==-1) return -1; + if (*filter->pc==';') + { + ++filter->pc; + return 1; + } + else + { + filter->errmsg=CUS "missing semicolon"; + return -1; + } +} + + +/************************************************* +* Parse and interpret a Sieve command * +*************************************************/ + +/* +Arguments: + filter points to the Sieve filter including its state + exec Execute parsed statements + generated where to hang newly-generated addresses + +Returns: 2 success by stop + 1 other success + -1 syntax or execution error +*/ +static int +parse_commands(struct Sieve *filter, int exec, address_item **generated) +{ +while (*filter->pc) + { + if (parse_white(filter)==-1) return -1; + if (parse_identifier(filter,CUS "if")) + { + /* + if-command = "if" test block *( "elsif" test block ) [ else block ] + */ + + int cond,m,unsuccessful; + + /* test block */ + if (parse_white(filter)==-1) return -1; + if ((m=parse_test(filter,&cond,exec))==-1) return -1; + if (m==0) + { + filter->errmsg=CUS "missing test"; + return -1; + } + if ((filter_test != FTEST_NONE && debug_selector != 0) || + (debug_selector & D_filter) != 0) + { + if (exec) debug_printf("if %s\n",cond?"true":"false"); + } + m=parse_block(filter,exec ? cond : 0, generated); + if (m==-1 || m==2) return m; + if (m==0) + { + filter->errmsg=CUS "missing block"; + return -1; + } + unsuccessful = !cond; + for (;;) /* elsif test block */ + { + if (parse_white(filter)==-1) return -1; + if (parse_identifier(filter,CUS "elsif")) + { + if (parse_white(filter)==-1) return -1; + m=parse_test(filter,&cond,exec && unsuccessful); + if (m==-1 || m==2) return m; + if (m==0) + { + filter->errmsg=CUS "missing test"; + return -1; + } + if ((filter_test != FTEST_NONE && debug_selector != 0) || + (debug_selector & D_filter) != 0) + { + if (exec) debug_printf("elsif %s\n",cond?"true":"false"); + } + m=parse_block(filter,exec && unsuccessful ? cond : 0, generated); + if (m==-1 || m==2) return m; + if (m==0) + { + filter->errmsg=CUS "missing block"; + return -1; + } + if (exec && unsuccessful && cond) unsuccessful = 0; + } + else break; + } + /* else block */ + if (parse_white(filter)==-1) return -1; + if (parse_identifier(filter,CUS "else")) + { + m=parse_block(filter,exec && unsuccessful, generated); + if (m==-1 || m==2) return m; + if (m==0) + { + filter->errmsg=CUS "missing block"; + return -1; + } + } + } + else if (parse_identifier(filter,CUS "stop")) + { + /* + stop-command = "stop" { stop-options } ";" + stop-options = + */ + + if (parse_semicolon(filter)==-1) return -1; + if (exec) + { + filter->pc+=Ustrlen(filter->pc); + return 2; + } + } + else if (parse_identifier(filter,CUS "keep")) + { + /* + keep-command = "keep" { keep-options } ";" + keep-options = + */ + + if (parse_semicolon(filter)==-1) return -1; + if (exec) + { + add_addr(generated,US"inbox",1,0,0,0); + filter->keep = 0; + } + } + else if (parse_identifier(filter,CUS "discard")) + { + /* + discard-command = "discard" { discard-options } ";" + discard-options = + */ + + if (parse_semicolon(filter)==-1) return -1; + if (exec) filter->keep=0; + } + else if (parse_identifier(filter,CUS "redirect")) + { + /* + redirect-command = "redirect" redirect-options "string" ";" + redirect-options = + redirect-options =) ":copy" + */ + + struct String recipient; + int m; + int copy=0; + + for (;;) + { + if (parse_white(filter)==-1) return -1; + if (parse_identifier(filter,CUS ":copy")==1) + { + if (!filter->require_copy) + { + filter->errmsg=CUS "missing previous require \"copy\";"; + return -1; + } + copy=1; + } + else break; + } + if (parse_white(filter)==-1) return -1; + if ((m=parse_string(filter,&recipient))!=1) + { + if (m==0) filter->errmsg=CUS "missing redirect recipient string"; + return -1; + } + if (strchr(CCS recipient.character,'@')==(char*)0) + { + filter->errmsg=CUS "unqualified recipient address"; + return -1; + } + if (exec) + { + add_addr(generated,recipient.character,0,0,0,0); + if (!copy) filter->keep = 0; + } + if (parse_semicolon(filter)==-1) return -1; + } + else if (parse_identifier(filter,CUS "fileinto")) + { + /* + fileinto-command = "fileinto" { fileinto-options } string ";" + fileinto-options = + fileinto-options =) [ ":copy" ] + */ + + struct String folder; + uschar *s; + int m; + unsigned long maxage, maxmessages, maxstorage; + int copy=0; + + maxage = maxmessages = maxstorage = 0; + if (!filter->require_fileinto) + { + filter->errmsg=CUS "missing previous require \"fileinto\";"; + return -1; + } + for (;;) + { + if (parse_white(filter)==-1) return -1; + if (parse_identifier(filter,CUS ":copy")==1) + { + if (!filter->require_copy) + { + filter->errmsg=CUS "missing previous require \"copy\";"; + return -1; + } + copy=1; + } + else break; + } + if (parse_white(filter)==-1) return -1; + if ((m=parse_string(filter,&folder))!=1) + { + if (m==0) filter->errmsg=CUS "missing fileinto folder string"; + return -1; + } + m=0; s=folder.character; + if (folder.length==0) m=1; + if (Ustrcmp(s,"..")==0 || Ustrncmp(s,"../",3)==0) m=1; + else while (*s) + { + if (Ustrcmp(s,"/..")==0 || Ustrncmp(s,"/../",4)==0) { m=1; break; } + ++s; + } + if (m) + { + filter->errmsg=CUS "invalid folder"; + return -1; + } + if (exec) + { + add_addr(generated, folder.character, 1, maxage, maxmessages, maxstorage); + if (!copy) filter->keep = 0; + } + if (parse_semicolon(filter)==-1) return -1; + } +#ifdef ENOTIFY + else if (parse_identifier(filter,CUS "notify")) + { + /* + notify-command = "notify" { notify-options } <method: string> ";" + notify-options = [":from" string] + [":importance" <"1" / "2" / "3">] + [":options" 1*(string-list / number)] + [":message" string] + */ + + int m; + struct String from; + struct String importance; + struct String message; + struct String method; + struct Notification *already; + string_item *recipient; + struct String header; + struct String subject; + struct String body; + uschar *envelope_from; + struct String auto_submitted_value; + uschar *auto_submitted_def; + + if (!filter->require_enotify) + { + filter->errmsg=CUS "missing previous require \"enotify\";"; + return -1; + } + from.character=(uschar*)0; + from.length=-1; + importance.character=(uschar*)0; + importance.length=-1; + message.character=(uschar*)0; + message.length=-1; + recipient=NULL; + header.length=-1; + header.character=(uschar*)0; + subject.length=-1; + subject.character=(uschar*)0; + body.length=-1; + body.character=(uschar*)0; + envelope_from = sender_address && sender_address[0] + ? expand_string(US"$local_part_prefix$local_part$local_part_suffix@$domain") : US ""; + if (!envelope_from) + { + filter->errmsg=CUS "expansion failure for envelope from"; + return -1; + } + for (;;) + { + if (parse_white(filter)==-1) return -1; + if (parse_identifier(filter,CUS ":from")==1) + { + if (parse_white(filter)==-1) return -1; + if ((m=parse_string(filter,&from))!=1) + { + if (m==0) filter->errmsg=CUS "from string expected"; + return -1; + } + } + else if (parse_identifier(filter,CUS ":importance")==1) + { + if (parse_white(filter)==-1) return -1; + if ((m=parse_string(filter,&importance))!=1) + { + if (m==0) filter->errmsg=CUS "importance string expected"; + return -1; + } + if (importance.length!=1 || importance.character[0]<'1' || importance.character[0]>'3') + { + filter->errmsg=CUS "invalid importance"; + return -1; + } + } + else if (parse_identifier(filter,CUS ":options")==1) + { + if (parse_white(filter)==-1) return -1; + } + else if (parse_identifier(filter,CUS ":message")==1) + { + if (parse_white(filter)==-1) return -1; + if ((m=parse_string(filter,&message))!=1) + { + if (m==0) filter->errmsg=CUS "message string expected"; + return -1; + } + } + else break; + } + if (parse_white(filter)==-1) return -1; + if ((m=parse_string(filter,&method))!=1) + { + if (m==0) filter->errmsg=CUS "missing method string"; + return -1; + } + if (parse_semicolon(filter)==-1) return -1; + if (parse_mailto_uri(filter,method.character,&recipient,&header,&subject,&body)!=1) + return -1; + if (exec) + { + if (message.length==-1) message=subject; + if (message.length==-1) expand_header(&message,&str_subject); + expand_header(&auto_submitted_value,&str_auto_submitted); + auto_submitted_def=expand_string(US"${if def:header_auto-submitted {true}{false}}"); + if (!auto_submitted_value.character || !auto_submitted_def) + { + filter->errmsg=CUS "header string expansion failed"; + return -1; + } + if (Ustrcmp(auto_submitted_def,"true")!=0 || Ustrcmp(auto_submitted_value.character,"no")==0) + { + for (already=filter->notified; already; already=already->next) + { + if (already->method.length==method.length + && (method.length==-1 || Ustrcmp(already->method.character,method.character)==0) + && already->importance.length==importance.length + && (importance.length==-1 || Ustrcmp(already->importance.character,importance.character)==0) + && already->message.length==message.length + && (message.length==-1 || Ustrcmp(already->message.character,message.character)==0)) + break; + } + if (!already) + /* New notification, process it */ + { + struct Notification * sent = store_get(sizeof(struct Notification), GET_UNTAINTED); + sent->method=method; + sent->importance=importance; + sent->message=message; + sent->next=filter->notified; + filter->notified=sent; + #ifndef COMPILE_SYNTAX_CHECKER + if (filter_test == FTEST_NONE) + { + int pid, fd; + + if ((pid = child_open_exim2(&fd, envelope_from, envelope_from, + US"sieve-notify")) >= 1) + { + FILE * f = fdopen(fd, "wb"); + + fprintf(f,"From: %s\n", from.length == -1 + ? expand_string(US"$local_part_prefix$local_part$local_part_suffix@$domain") + : from.character); + for (string_item * p = recipient; p; p=p->next) + fprintf(f, "To: %s\n",p->text); + fprintf(f, "Auto-Submitted: auto-notified; %s\n", filter->enotify_mailto_owner); + if (header.length > 0) fprintf(f, "%s", header.character); + if (message.length==-1) + { + message.character=US"Notification"; + message.length=Ustrlen(message.character); + } + if (message.length != -1) + fprintf(f, "Subject: %s\n", parse_quote_2047(message.character, + message.length, US"utf-8", TRUE)); + fprintf(f,"\n"); + if (body.length > 0) fprintf(f, "%s\n", body.character); + fflush(f); + (void)fclose(f); + (void)child_close(pid, 0); + } + } + if ((filter_test != FTEST_NONE && debug_selector != 0) || debug_selector & D_filter) + debug_printf("Notification to `%s': '%s'.\n",method.character,message.length!=-1 ? message.character : CUS ""); +#endif + } + else + if ((filter_test != FTEST_NONE && debug_selector != 0) || debug_selector & D_filter) + debug_printf("Repeated notification to `%s' ignored.\n",method.character); + } + else + if ((filter_test != FTEST_NONE && debug_selector != 0) || debug_selector & D_filter) + debug_printf("Ignoring notification, triggering message contains Auto-submitted: field.\n"); + } + } +#endif +#ifdef VACATION + else if (parse_identifier(filter,CUS "vacation")) + { + /* + vacation-command = "vacation" { vacation-options } <reason: string> ";" + vacation-options = [":days" number] + [":subject" string] + [":from" string] + [":addresses" string-list] + [":mime"] + [":handle" string] + */ + + int m; + unsigned long days; + struct String subject; + struct String from; + struct String *addresses; + int reason_is_mime; + string_item *aliases; + struct String handle; + struct String reason; + + if (!filter->require_vacation) + { + filter->errmsg=CUS "missing previous require \"vacation\";"; + return -1; + } + if (exec) + { + if (filter->vacation_ran) + { + filter->errmsg=CUS "trying to execute vacation more than once"; + return -1; + } + filter->vacation_ran=1; + } + days=VACATION_MIN_DAYS>7 ? VACATION_MIN_DAYS : 7; + subject.character=(uschar*)0; + subject.length=-1; + from.character=(uschar*)0; + from.length=-1; + addresses=(struct String*)0; + aliases=NULL; + reason_is_mime=0; + handle.character=(uschar*)0; + handle.length=-1; + for (;;) + { + if (parse_white(filter)==-1) return -1; + if (parse_identifier(filter,CUS ":days")==1) + { + if (parse_white(filter)==-1) return -1; + if (parse_number(filter,&days)==-1) return -1; + if (days<VACATION_MIN_DAYS) days=VACATION_MIN_DAYS; + else if (days>VACATION_MAX_DAYS) days=VACATION_MAX_DAYS; + } + else if (parse_identifier(filter,CUS ":subject")==1) + { + if (parse_white(filter)==-1) return -1; + if ((m=parse_string(filter,&subject))!=1) + { + if (m==0) filter->errmsg=CUS "subject string expected"; + return -1; + } + } + else if (parse_identifier(filter,CUS ":from")==1) + { + if (parse_white(filter)==-1) return -1; + if ((m=parse_string(filter,&from))!=1) + { + if (m==0) filter->errmsg=CUS "from string expected"; + return -1; + } + if (check_mail_address(filter,&from)!=1) + return -1; + } + else if (parse_identifier(filter,CUS ":addresses")==1) + { + if (parse_white(filter)==-1) return -1; + if ((m=parse_stringlist(filter,&addresses))!=1) + { + if (m==0) filter->errmsg=CUS "addresses string list expected"; + return -1; + } + for (struct String * a = addresses; a->length != -1; ++a) + { + string_item * new = store_get(sizeof(string_item), GET_UNTAINTED); + + new->text = store_get(a->length+1, a->character); + if (a->length) memcpy(new->text,a->character,a->length); + new->text[a->length]='\0'; + new->next=aliases; + aliases=new; + } + } + else if (parse_identifier(filter,CUS ":mime")==1) + reason_is_mime=1; + else if (parse_identifier(filter,CUS ":handle")==1) + { + if (parse_white(filter)==-1) return -1; + if ((m=parse_string(filter,&from))!=1) + { + if (m==0) filter->errmsg=CUS "handle string expected"; + return -1; + } + } + else break; + } + if (parse_white(filter)==-1) return -1; + if ((m=parse_string(filter,&reason))!=1) + { + if (m==0) filter->errmsg=CUS "missing reason string"; + return -1; + } + if (reason_is_mime) + { + uschar *s,*end; + + for (s = reason.character, end = reason.character + reason.length; + s<end && (*s&0x80)==0; ) s++; + if (s<end) + { + filter->errmsg=CUS "MIME reason string contains 8bit text"; + return -1; + } + } + if (parse_semicolon(filter)==-1) return -1; + + if (exec) + { + address_item *addr; + md5 base; + uschar digest[16]; + uschar hexdigest[33]; + gstring * once; + + if (filter_personal(aliases,TRUE)) + { + if (filter_test == FTEST_NONE) + { + /* ensure oncelog directory exists; failure will be detected later */ + + (void)directory_make(NULL, filter->vacation_directory, 0700, FALSE); + } + /* build oncelog filename */ + + md5_start(&base); + + if (handle.length==-1) + { + gstring * key = NULL; + if (subject.length!=-1) key =string_catn(key, subject.character, subject.length); + if (from.length!=-1) key = string_catn(key, from.character, from.length); + key = string_catn(key, reason_is_mime?US"1":US"0", 1); + key = string_catn(key, reason.character, reason.length); + md5_end(&base, key->s, key->ptr, digest); + } + else + md5_end(&base, handle.character, handle.length, digest); + + for (int i = 0; i < 16; i++) sprintf(CS (hexdigest+2*i), "%02X", digest[i]); + + if ((filter_test != FTEST_NONE && debug_selector != 0) || (debug_selector & D_filter) != 0) + debug_printf("Sieve: mail was personal, vacation file basename: %s\n", hexdigest); + + if (filter_test == FTEST_NONE) + { + once = string_cat (NULL, filter->vacation_directory); + once = string_catn(once, US"/", 1); + once = string_catn(once, hexdigest, 33); + + /* process subject */ + + if (subject.length==-1) + { + uschar *subject_def; + + subject_def = expand_string(US"${if def:header_subject {true}{false}}"); + if (subject_def && Ustrcmp(subject_def,"true")==0) + { + gstring * g = string_catn(NULL, US"Auto: ", 6); + + expand_header(&subject,&str_subject); + g = string_catn(g, subject.character, subject.length); + subject.character = string_from_gstring(g); + subject.length = g->ptr; + } + else + { + subject.character=US"Automated reply"; + subject.length=Ustrlen(subject.character); + } + } + + /* add address to list of generated addresses */ + + addr = deliver_make_addr(string_sprintf(">%.256s", sender_address), FALSE); + setflag(addr, af_pfr); + addr->prop.ignore_error = TRUE; + addr->next = *generated; + *generated = addr; + addr->reply = store_get(sizeof(reply_item), GET_UNTAINTED); + memset(addr->reply,0,sizeof(reply_item)); /* XXX */ + addr->reply->to = string_copy(sender_address); + if (from.length==-1) + addr->reply->from = expand_string(US"$local_part@$domain"); + else + addr->reply->from = from.character; + /* deconst cast safe as we pass in a non-const item */ + addr->reply->subject = US parse_quote_2047(subject.character, subject.length, US"utf-8", TRUE); + addr->reply->oncelog = string_from_gstring(once); + addr->reply->once_repeat=days*86400; + + /* build body and MIME headers */ + + if (reason_is_mime) + { + uschar *mime_body,*reason_end; + static const uschar nlnl[]="\r\n\r\n"; + + for + ( + mime_body = reason.character, reason_end = reason.character + reason.length; + mime_body < (reason_end-(sizeof(nlnl)-1)) && memcmp(mime_body, nlnl, (sizeof(nlnl)-1)); + ) mime_body++; + + addr->reply->headers = string_copyn(reason.character, mime_body-reason.character); + + if (mime_body+(sizeof(nlnl)-1)<reason_end) mime_body+=(sizeof(nlnl)-1); + else mime_body=reason_end-1; + addr->reply->text = string_copyn(mime_body, reason_end-mime_body); + } + else + { + struct String qp = { .character = NULL, .length = 0 }; /* Keep compiler happy (PH) */ + + addr->reply->headers = US"MIME-Version: 1.0\n" + "Content-Type: text/plain;\n" + "\tcharset=\"utf-8\"\n" + "Content-Transfer-Encoding: quoted-printable"; + addr->reply->text = quoted_printable_encode(&reason,&qp)->character; + } + } + } + else if ((filter_test != FTEST_NONE && debug_selector != 0) || (debug_selector & D_filter) != 0) + debug_printf("Sieve: mail was not personal, vacation would ignore it\n"); + } + } + else break; +#endif + } +return 1; +} + + +/************************************************* +* Parse and interpret a sieve filter * +*************************************************/ + +/* +Arguments: + filter points to the Sieve filter including its state + exec Execute parsed statements + generated where to hang newly-generated addresses + +Returns: 1 success + -1 syntax or execution error +*/ + +static int +parse_start(struct Sieve *filter, int exec, address_item **generated) +{ +filter->pc=filter->filter; +filter->line=1; +filter->keep=1; +filter->require_envelope=0; +filter->require_fileinto=0; +#ifdef ENCODED_CHARACTER +filter->require_encoded_character=0; +#endif +#ifdef ENVELOPE_AUTH +filter->require_envelope_auth=0; +#endif +#ifdef ENOTIFY +filter->require_enotify=0; +filter->notified=(struct Notification*)0; +#endif +#ifdef SUBADDRESS +filter->require_subaddress=0; +#endif +#ifdef VACATION +filter->require_vacation=0; +filter->vacation_ran=0; +#endif +filter->require_copy=0; +filter->require_iascii_numeric=0; + +if (parse_white(filter)==-1) return -1; + +if (exec && filter->vacation_directory && filter_test == FTEST_NONE) + { + DIR *oncelogdir; + struct dirent *oncelog; + struct stat properties; + time_t now; + + /* clean up old vacation log databases */ + + if ( !(oncelogdir = exim_opendir(filter->vacation_directory)) + && errno != ENOENT) + { + filter->errmsg = CUS "unable to open vacation directory"; + return -1; + } + + if (oncelogdir) + { + time(&now); + + while ((oncelog = readdir(oncelogdir))) + if (strlen(oncelog->d_name)==32) + { + uschar *s = string_sprintf("%s/%s", filter->vacation_directory, oncelog->d_name); + if (Ustat(s,&properties) == 0 && properties.st_mtime+VACATION_MAX_DAYS*86400 < now) + Uunlink(s); + } + closedir(oncelogdir); + } + } + +while (parse_identifier(filter,CUS "require")) + { + /* + require-command = "require" <capabilities: string-list> + */ + + struct String *cap; + int m; + + if (parse_white(filter)==-1) return -1; + if ((m=parse_stringlist(filter,&cap))!=1) + { + if (m==0) filter->errmsg=CUS "capability string list expected"; + return -1; + } + for (struct String * check = cap; check->character; ++check) + { + if (eq_octet(check,&str_envelope,0)) filter->require_envelope=1; + else if (eq_octet(check,&str_fileinto,0)) filter->require_fileinto=1; +#ifdef ENCODED_CHARACTER + else if (eq_octet(check,&str_encoded_character,0)) filter->require_encoded_character=1; +#endif +#ifdef ENVELOPE_AUTH + else if (eq_octet(check,&str_envelope_auth,0)) filter->require_envelope_auth=1; +#endif +#ifdef ENOTIFY + else if (eq_octet(check,&str_enotify,0)) + { + if (!filter->enotify_mailto_owner) + { + filter->errmsg=CUS "enotify disabled"; + return -1; + } + filter->require_enotify=1; + } +#endif +#ifdef SUBADDRESS + else if (eq_octet(check,&str_subaddress,0)) filter->require_subaddress=1; +#endif +#ifdef VACATION + else if (eq_octet(check,&str_vacation,0)) + { + if (filter_test == FTEST_NONE && !filter->vacation_directory) + { + filter->errmsg=CUS "vacation disabled"; + return -1; + } + filter->require_vacation=1; + } +#endif + else if (eq_octet(check,&str_copy,0)) filter->require_copy=1; + else if (eq_octet(check,&str_comparator_ioctet,0)) ; + else if (eq_octet(check,&str_comparator_iascii_casemap,0)) ; + else if (eq_octet(check,&str_comparator_enascii_casemap,0)) ; + else if (eq_octet(check,&str_comparator_iascii_numeric,0)) filter->require_iascii_numeric=1; + else + { + filter->errmsg=CUS "unknown capability"; + return -1; + } + } + if (parse_semicolon(filter)==-1) return -1; + } + if (parse_commands(filter,exec,generated)==-1) return -1; + if (*filter->pc) + { + filter->errmsg=CUS "syntax error"; + return -1; + } + return 1; +} + + +/************************************************* +* Interpret a sieve filter file * +*************************************************/ + +/* +Arguments: + filter points to the entire file, read into store as a single string + options controls whether various special things are allowed, and requests + special actions (not currently used) + vacation_directory where to store vacation "once" files + enotify_mailto_owner owner of mailto notifications + useraddress string expression for :user part of address + subaddress string expression for :subaddress part of address + generated where to hang newly-generated addresses + error where to pass back an error text + +Returns: FF_DELIVERED success, a significant action was taken + FF_NOTDELIVERED success, no significant action + FF_DEFER defer requested + FF_FAIL fail requested + FF_FREEZE freeze requested + FF_ERROR there was a problem +*/ + +int +sieve_interpret(const uschar * filter, int options, + const uschar * vacation_directory, const uschar * enotify_mailto_owner, + const uschar * useraddress, const uschar * subaddress, + address_item ** generated, uschar ** error) +{ +struct Sieve sieve; +int r; +uschar * msg; + +DEBUG(D_route) debug_printf("Sieve: start of processing\n"); +sieve.filter = filter; + +if (!vacation_directory) + sieve.vacation_directory = NULL; +else if (!(sieve.vacation_directory = expand_cstring(vacation_directory))) + { + *error = string_sprintf("failed to expand \"%s\" " + "(sieve_vacation_directory): %s", vacation_directory, + expand_string_message); + return FF_ERROR; + } + +if (!enotify_mailto_owner) + sieve.enotify_mailto_owner = NULL; +else if (!(sieve.enotify_mailto_owner = expand_cstring(enotify_mailto_owner))) + { + *error = string_sprintf("failed to expand \"%s\" " + "(sieve_enotify_mailto_owner): %s", enotify_mailto_owner, + expand_string_message); + return FF_ERROR; + } + +sieve.useraddress = useraddress + ? useraddress : CUS "$local_part_prefix$local_part$local_part_suffix"; +sieve.subaddress = subaddress; + +#ifdef COMPILE_SYNTAX_CHECKER +if (parse_start(&sieve, 0, generated) == 1) +#else +if (parse_start(&sieve, 1, generated) == 1) +#endif + if (sieve.keep) + { + add_addr(generated, US"inbox", 1, 0, 0, 0); + msg = US"Implicit keep"; + r = FF_DELIVERED; + } + else + { + msg = US"No implicit keep"; + r = FF_DELIVERED; + } +else + { + msg = string_sprintf("Sieve error: %s in line %d",sieve.errmsg,sieve.line); +#ifdef COMPILE_SYNTAX_CHECKER + r = FF_ERROR; + *error = msg; +#else + add_addr(generated,US"inbox",1,0,0,0); + r = FF_DELIVERED; +#endif + } + +#ifndef COMPILE_SYNTAX_CHECKER +if (filter_test != FTEST_NONE) printf("%s\n", (const char*) msg); + else debug_printf("%s\n", msg); +#endif + +DEBUG(D_route) debug_printf("Sieve: end of processing\n"); +return r; +} |