--- sendmail/headers.c 13 Jan 2003 19:30:28 -0000 8.266.4.3 +++ sendmail/headers.c 16 Jan 2003 23:31:17 -0000 @@ -676,8 +676,8 @@ if (buf[0] != '\0') { if (bitset(H_FROM, h->h_flags)) - expand(crackaddr(buf), buf, sizeof buf, - e); + expand(crackaddr(buf, e), + buf, sizeof buf, e); h->h_value = sm_rpool_strdup_x(e->e_rpool, buf); h->h_flags &= ~H_DEFAULT; } @@ -998,7 +998,11 @@ ** it and replaces it with "$g". The parse is totally ad hoc ** and isn't even guaranteed to leave something syntactically ** identical to what it started with. However, it does leave -** something semantically identical. +** something semantically identical if possible, else at least +** syntactically correct. +** +** For example, it changes "Real Name (Comment)" +** to "Real Name <$g> (Comment)". ** ** This algorithm has been cleaned up to handle a wider range ** of cases -- notably quoted and backslash escaped strings. @@ -1007,6 +1011,7 @@ ** ** Parameters: ** addr -- the address to be cracked. +** e -- the current envelope. ** ** Returns: ** a pointer to the new version. @@ -1019,28 +1024,50 @@ ** be copied if it is to be reused. */ +#define SM_HAVE_ROOM ((bp < buflim) && (buflim <= bufend)) + +/* +** Append a character to bp if we have room. +** If not, punt and return $g. +*/ + +#define SM_APPEND_CHAR(c) \ + do \ + { \ + if (SM_HAVE_ROOM) \ + *bp++ = (c); \ + else \ + goto returng; \ + } while (0) + +#if MAXNAME < 10 +ERROR MAXNAME must be at least 10 +#endif /* MAXNAME < 10 */ + char * -crackaddr(addr) +crackaddr(addr, e) register char *addr; + ENVELOPE *e; { register char *p; register char c; - int cmtlev; - int realcmtlev; - int anglelev, realanglelev; - int copylev; - int bracklev; - bool qmode; - bool realqmode; - bool skipping; - bool putgmac = false; - bool quoteit = false; - bool gotangle = false; - bool gotcolon = false; + int cmtlev; /* comment level in input string */ + int realcmtlev; /* comment level in output string */ + int anglelev; /* angle level in input string */ + int copylev; /* 0 == in address, >0 copying */ + int bracklev; /* bracket level for IPv6 addr check */ + bool addangle; /* put closing angle in output */ + bool qmode; /* quoting in original string? */ + bool realqmode; /* quoting in output string? */ + bool putgmac = false; /* already wrote $g */ + bool quoteit = false; /* need to quote next character */ + bool gotangle = false; /* found first '<' */ + bool gotcolon = false; /* found a ':' */ register char *bp; char *buflim; char *bufhead; char *addrhead; + char *bufend; static char buf[MAXNAME + 1]; if (tTd(33, 1)) @@ -1055,25 +1082,22 @@ ** adjusted later if we find them. */ + buflim = bufend = &buf[sizeof(buf) - 1]; bp = bufhead = buf; - buflim = &buf[sizeof buf - 7]; p = addrhead = addr; - copylev = anglelev = realanglelev = cmtlev = realcmtlev = 0; + copylev = anglelev = cmtlev = realcmtlev = 0; bracklev = 0; - qmode = realqmode = false; + qmode = realqmode = addangle = false; while ((c = *p++) != '\0') { /* - ** If the buffer is overful, go into a special "skipping" - ** mode that tries to keep legal syntax but doesn't actually - ** output things. + ** Try to keep legal syntax using spare buffer space + ** (maintained by buflim). */ - skipping = bp >= buflim; - - if (copylev > 0 && !skipping) - *bp++ = c; + if (copylev > 0) + SM_APPEND_CHAR(c); /* check for backslash escapes */ if (c == '\\') @@ -1088,8 +1112,8 @@ p--; goto putg; } - if (copylev > 0 && !skipping) - *bp++ = c; + if (copylev > 0) + SM_APPEND_CHAR(c); goto putg; } @@ -1097,8 +1121,14 @@ if (c == '"' && cmtlev <= 0) { qmode = !qmode; - if (copylev > 0 && !skipping) + if (copylev > 0 && SM_HAVE_ROOM) + { + if (realqmode) + buflim--; + else + buflim++; realqmode = !realqmode; + } continue; } if (qmode) @@ -1110,15 +1140,15 @@ cmtlev++; /* allow space for closing paren */ - if (!skipping) + if (SM_HAVE_ROOM) { buflim--; realcmtlev++; if (copylev++ <= 0) { if (bp != bufhead) - *bp++ = ' '; - *bp++ = c; + SM_APPEND_CHAR(' '); + SM_APPEND_CHAR(c); } } } @@ -1128,7 +1158,7 @@ { cmtlev--; copylev--; - if (!skipping) + if (SM_HAVE_ROOM) { realcmtlev--; buflim++; @@ -1139,7 +1169,7 @@ else if (c == ')') { /* syntax error: unmatched ) */ - if (copylev > 0 && !skipping) + if (copylev > 0 && SM_HAVE_ROOM) bp--; } @@ -1157,7 +1187,7 @@ /* ** Check for DECnet phase IV ``::'' (host::user) - ** or ** DECnet phase V ``:.'' syntaxes. The latter + ** or DECnet phase V ``:.'' syntaxes. The latter ** covers ``user@DEC:.tay.myhost'' and ** ``DEC:.tay.myhost::user'' syntaxes (bletch). */ @@ -1166,10 +1196,10 @@ { if (cmtlev <= 0 && !qmode) quoteit = true; - if (copylev > 0 && !skipping) + if (copylev > 0) { - *bp++ = c; - *bp++ = *p; + SM_APPEND_CHAR(c); + SM_APPEND_CHAR(*p); } p++; goto putg; @@ -1180,41 +1210,43 @@ bp = bufhead; if (quoteit) { - *bp++ = '"'; + SM_APPEND_CHAR('"'); /* back up over the ':' and any spaces */ --p; - while (isascii(*--p) && isspace(*p)) + while (p > addr && + isascii(*--p) && isspace(*p)) continue; p++; } for (q = addrhead; q < p; ) { c = *q++; - if (bp < buflim) + if (quoteit && c == '"') { - if (quoteit && c == '"') - *bp++ = '\\'; - *bp++ = c; + SM_APPEND_CHAR('\\'); + SM_APPEND_CHAR(c); } + else + SM_APPEND_CHAR(c); } if (quoteit) { if (bp == &bufhead[1]) bp--; else - *bp++ = '"'; + SM_APPEND_CHAR('"'); while ((c = *p++) != ':') - { - if (bp < buflim) - *bp++ = c; - } - *bp++ = c; + SM_APPEND_CHAR(c); + SM_APPEND_CHAR(c); } /* any trailing white space is part of group: */ - while (isascii(*p) && isspace(*p) && bp < buflim) - *bp++ = *p++; + while (isascii(*p) && isspace(*p)) + { + SM_APPEND_CHAR(*p); + p++; + } copylev = 0; putgmac = quoteit = false; bufhead = bp; @@ -1223,10 +1255,7 @@ } if (c == ';' && copylev <= 0 && !ColonOkInAddr) - { - if (bp < buflim) - *bp++ = c; - } + SM_APPEND_CHAR(c); /* check for characters that may have to be quoted */ if (strchr(MustQuoteChars, c) != NULL) @@ -1254,42 +1283,45 @@ /* oops -- have to change our mind */ anglelev = 1; - if (!skipping) - realanglelev = 1; + if (SM_HAVE_ROOM) + { + if (!addangle) + buflim--; + addangle = true; + } bp = bufhead; if (quoteit) { - *bp++ = '"'; + SM_APPEND_CHAR('"'); /* back up over the '<' and any spaces */ --p; - while (isascii(*--p) && isspace(*p)) + while (p > addr && + isascii(*--p) && isspace(*p)) continue; p++; } for (q = addrhead; q < p; ) { c = *q++; - if (bp < buflim) + if (quoteit && c == '"') { - if (quoteit && c == '"') - *bp++ = '\\'; - *bp++ = c; + SM_APPEND_CHAR('\\'); + SM_APPEND_CHAR(c); } + else + SM_APPEND_CHAR(c); } if (quoteit) { if (bp == &buf[1]) bp--; else - *bp++ = '"'; + SM_APPEND_CHAR('"'); while ((c = *p++) != '<') - { - if (bp < buflim) - *bp++ = c; - } - *bp++ = c; + SM_APPEND_CHAR(c); + SM_APPEND_CHAR(c); } copylev = 0; putgmac = quoteit = false; @@ -1301,13 +1333,14 @@ if (anglelev > 0) { anglelev--; - if (!skipping) + if (SM_HAVE_ROOM) { - realanglelev--; - buflim++; + if (addangle) + buflim++; + addangle = false; } } - else if (!skipping) + else if (SM_HAVE_ROOM) { /* syntax error: unmatched > */ if (copylev > 0) @@ -1316,7 +1349,7 @@ continue; } if (copylev++ <= 0) - *bp++ = c; + SM_APPEND_CHAR(c); continue; } @@ -1324,30 +1357,42 @@ putg: if (copylev <= 0 && !putgmac) { - if (bp > bufhead && bp[-1] == ')') - *bp++ = ' '; - *bp++ = MACROEXPAND; - *bp++ = 'g'; + if (bp > buf && bp[-1] == ')') + SM_APPEND_CHAR(' '); + SM_APPEND_CHAR(MACROEXPAND); + SM_APPEND_CHAR('g'); putgmac = true; } } /* repair any syntactic damage */ - if (realqmode) + if (realqmode && bp < bufend) *bp++ = '"'; - while (realcmtlev-- > 0) + while (realcmtlev-- > 0 && bp < bufend) *bp++ = ')'; - while (realanglelev-- > 0) + if (addangle && bp < bufend) *bp++ = '>'; - *bp++ = '\0'; + *bp = '\0'; + if (bp < bufend) + goto success; + + returng: + /* String too long, punt */ + buf[0] = '<'; + buf[1] = MACROEXPAND; + buf[2]= 'g'; + buf[3] = '>'; + buf[4]= '\0'; + sm_syslog(LOG_ALERT, e->e_id, + "Dropped invalid comments from header address"); + success: if (tTd(33, 1)) { sm_dprintf("crackaddr=>`"); xputs(buf); sm_dprintf("'\n"); } - return buf; } /* --- sendmail/main.c 8 Jan 2003 23:09:59 -0000 8.887.2.17 +++ sendmail/main.c 14 Jan 2003 02:38:58 -0000 @@ -4423,7 +4423,7 @@ "Usage: /parse address\n"); return; } - q = crackaddr(p); + q = crackaddr(p, e); (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, "Cracked address = "); xputs(q); --- sendmail/parseaddr.c 26 Sep 2002 23:03:39 -0000 8.359.2.3 +++ sendmail/parseaddr.c 14 Jan 2003 02:38:58 -0000 @@ -2509,7 +2509,7 @@ if (bitset(RF_CANONICAL, flags) || bitnset(M_NOCOMMENT, m->m_flags)) fancy = "\201g"; else - fancy = crackaddr(name); + fancy = crackaddr(name, e); /* ** Turn the name into canonical form. --- sendmail/sendmail.h 12 Dec 2002 22:46:35 -0000 8.919.2.15 +++ sendmail/sendmail.h 14 Jan 2003 02:38:58 -0000 @@ -394,7 +394,7 @@ /* functions */ extern void cataddr __P((char **, char **, char *, int, int)); -extern char *crackaddr __P((char *)); +extern char *crackaddr __P((char *, ENVELOPE *)); extern bool emptyaddr __P((ADDRESS *)); extern ADDRESS *getctladdr __P((ADDRESS *)); extern int include __P((char *, bool, ADDRESS *, ADDRESS **, int, ENVELOPE *));