void skipWhite(const char **s)
{
const char *t = *s;
while (isspaceByte(*t))
++t;
*s = t;
} /* skipWhite */
void trimWhite(char *s)
{
int l;
if (!s)
return;
l = strlen(s);
while (l && isspaceByte(s[l - 1]))
--l;
s[l] = 0;
} /* trimWhite */
/* compress white space */
void spaceCrunch(char *s, bool onespace, bool unprint)
{
int i, j;
char c;
bool space = true;
for (i = j = 0; c = s[i]; ++i) {
if (isspaceByte(c)) {
if (!onespace)
continue;
if (!space)
s[j++] = ' ', space = true;
continue;
}
if (unprint && !isprintByte(c))
continue;
s[j++] = c, space = false;
}
if (space && j)
--j; /* drop trailing space */
s[j] = 0;
} /* spaceCrunch */
/* Return 0 if there was no need to encode */
static char *isoEncode(char *start, char *end)
{
int nacount = 0, count = 0, len;
char *s, *t;
char c, code;
for (s = start; s < end; ++s) {
c = *s;
if (c == 0)
*s = ' ';
if (isspaceByte(c))
*s = ' ';
}
for (s = start; s < end; ++s) {
c = *s;
++count;
if (!isprintByte(c) && c != ' ')
++nacount;
}
if (!nacount)
return 0;
if (nacount * 4 >= count && count > 8) {
code = 'B';
s = base64Encode(start, end - start, false);
goto package;
}
code = 'Q';
s = qpEncode(start);
package:
len = strlen(s);
t = allocMem(len + 20);
sprintf(t, "=?ISO-8859-1?%c?%s?=", code, s);
nzFree(s);
return t;
} /* isoEncode */
/* read and/or refresh the address book */
bool loadAddressBook(void)
{
char *buf, *bufend, *v, *last, *s, *t;
bool cmt = false;
char state = 0, c;
int j, buflen, ln = 1;
time_t mtime;
if (!addressFile ||
(mtime = fileTimeByName(addressFile)) == -1 || mtime <= adbooktime)
return true;
debugPrint(3, "loading address book");
nzFree(addressList);
addressList = 0;
nads = 0;
if (!fileIntoMemory(addressFile, &buf, &buflen))
return false;
bufend = buf + buflen;
for (s = t = last = buf; s < bufend; ++s) {
c = *s;
if (cmt) {
if (c != '\n')
continue;
cmt = false;
}
if (c == ':') { /* delimiter */
if (state == 0) {
setError(MSG_ABNoAlias, ln);
freefail:
nzFree(buf);
nads = 0;
return false;
}
while (t[-1] == ' ' || t[-1] == '\t')
--t;
if (state == 1) {
*t++ = c;
state = 2;
continue;
}
c = '#'; /* extra fields are ignored */
} /* : */
if (c == '#') {
cmt = true;
continue;
}
if (c == '\n') {
++ln;
if (state == 0)
continue;
if (state == 1) {
setError(MSG_ABNoColon, ln - 1);
goto freefail;
}
if (state == 3) {
++nads;
while (isspaceByte(t[-1]))
--t;
*t = 0;
v = strchr(last, ':');
if (v - last >= 16) {
setError(MSG_ABAliasLong, ln - 1);
goto freefail;
}
++v;
if (t - v >= 64) {
setError(MSG_ABMailLong, ln - 1);
goto freefail;
}
if (!strchr(v, '@')) {
setError(MSG_ABNoAt, ln - 1);
goto freefail;
}
if (strpbrk(v, " \t")) {
setError(MSG_ABMailSpaces, ln - 1);
goto freefail;
}
while (last < t) {
if (!isprintByte(*last)) {
setError(MSG_AbMailUnprintable,
ln - 1);
goto freefail;
}
++last;
}
*t++ = c;
} else
t = last; /* back it up */
last = t;
state = 0;
continue;
}
/* nl */
if ((c == ' ' || c == '\t') && (state == 0 || state == 2))
continue;
if (state == 0)
state = 1;
if (state == 2)
state = 3;
*t++ = c;
}
*t = 0;
if (state) {
setError(MSG_ABUnterminated);
goto freefail;
}
if (nads) {
addressList = allocMem(nads * sizeof(struct ALIAS));
j = 0;
for (s = buf; *s; s = t + 1, ++j) {
t = strchr(s, ':');
memcpy(addressList[j].name, s, t - s);
addressList[j].name[t - s] = 0;
s = t + 1;
t = strchr(s, '\n');
memcpy(addressList[j].email, s, t - s);
addressList[j].email[t - s] = 0;
}
}
/* aliases are present */
nzFree(buf);
adbooktime = mtime;
return true;
} /* loadAddressBook */
/* Read a file into memory, mime encode it,
* and return the type of encoding and the encoded data.
* Last three parameters are result parameters.
* If ismail is nonzero, the file is the mail, not an attachment.
* In fact ismail indicates the line that holds the subject.
* If ismail is negative, then -ismail indicates the subject line,
* and the string file is not the filename, but rather, the mail to send. */
bool
encodeAttachment(const char *file, int ismail, bool webform,
const char **type_p, const char **enc_p, char **data_p)
{
char *buf;
char c;
bool longline;
char *s, *t, *v;
char *ct, *ce; /* content type, content encoding */
int buflen, i, cx;
int nacount, nullcount, nlcount;
if (ismail < 0) {
buf = cloneString(file);
buflen = strlen(buf);
ismail = -ismail;
file = EMPTYSTRING;
} else {
if (!ismc && (cx = stringIsNum(file)) >= 0) {
static char newfilename[16];
if (!unfoldBuffer(cx, false, &buf, &buflen))
return false;
if (!buflen) {
if (webform) {
empty:
buf = EMPTYSTRING;
ct = "text/plain";
ce = "7bit";
goto success;
}
setError(MSG_BufferXEmpty, cx);
goto freefail;
}
sprintf(newfilename, "<buffer %d>", cx);
file = newfilename;
if (sessionList[cx].lw->fileName)
file = sessionList[cx].lw->fileName;
} else {
if (!fileIntoMemory(file, &buf, &buflen))
return false;
if (!buflen) {
if (webform)
goto empty;
setError(MSG_FileXEmpty, file);
goto freefail;
}
}
} /* ismail negative or normal */
if (ismail) {
/* Put newline at the end. Yes, the buffer is allocated
* with space for newline and null. */
if (buf[buflen - 1] != '\n')
buf[buflen++] = '\n';
/* check for subject: line */
s = buf;
i = ismail;
while (--i) {
while (*s != '\n')
++s;
++s;
}
while (*s == ' ' || *s == '\t')
++s;
if (!memEqualCI(s, "subject:", 8)) {
setError(MSG_SubjectStart);
goto freefail;
}
s += 8;
while (*s == ' ' || *s == '\t')
++s;
t = s;
while (*s != '\n')
++s;
v = s;
while (s > t && isspaceByte(s[-1]))
--s;
if (s - t >= sizeof(subjectLine)) {
setError(MSG_SubjectLong, sizeof(subjectLine) - 1);
goto freefail;
}
if (s > t)
memcpy(subjectLine, t, s - t);
subjectLine[s - t] = 0;
if (subjectLine[0]) {
char *subjiso = isoEncode(subjectLine,
subjectLine +
strlen(subjectLine));
if (subjiso) {
if (strlen(subjiso) >= sizeof(subjectLine)) {
nzFree(subjiso);
setError(MSG_SubjectLong,
sizeof(subjectLine) - 1);
goto freefail;
}
strcpy(subjectLine, subjiso);
nzFree(subjiso);
}
}
debugPrint(6, "subject = %s", subjectLine);
/* Blank lines after subject are optional, and ignored. */
for (t = buf + buflen; v < t; ++v)
if (*v != '\r' && *v != '\n')
break;
buflen -= (v - buf);
if (buflen)
memmove(buf, v, buflen);
buf[buflen] = 0;
if (doSignature) { /* Append .signature file. */
/* Try account specific .signature file, then fall back to .signature */
sprintf(sigFileEnd, "%d", mailAccount);
c = fileTypeByName(sigFile, false);
if (!c) {
*sigFileEnd = 0;
c = fileTypeByName(sigFile, false);
}
if (c != 0) {
int fd, n;
if (c != 'f') {
setError(MSG_SigRegular);
goto freefail;
}
n = fileSizeByName(sigFile);
if (n > 0) {
buf = reallocMem(buf, buflen + n + 1);
fd = open(sigFile, O_RDONLY);
if (fd < 0) {
setError(MSG_SigAccess);
goto freefail;
}
read(fd, buf + buflen, n);
close(fd);
buflen += n;
buf[buflen] = 0;
}
}
} /* .signature */
}
/* Infer content type from the filename */
ct = 0;
s = strrchr(file, '.');
if (s && s[1]) {
++s;
if (stringEqualCI(s, "ps"))
ct = "application/PostScript";
if (stringEqualCI(s, "jpeg"))
ct = "image/jpeg";
if (stringEqualCI(s, "gif"))
ct = "image/gif";
if (stringEqualCI(s, "wav"))
ct = "audio/basic";
if (stringEqualCI(s, "mpeg"))
ct = "video/mpeg";
if (stringEqualCI(s, "rtf"))
ct = "text/richtext";
if (stringEqualCI(s, "htm") ||
stringEqualCI(s, "html") ||
stringEqualCI(s, "shtm") ||
stringEqualCI(s, "shtml") || stringEqualCI(s, "asp"))
ct = "text/html";
}
/* Count the nonascii characters */
nacount = nullcount = nlcount = 0;
longline = false;
s = 0;
for (i = 0; i < buflen; ++i) {
c = buf[i];
if (c == '\0')
++nullcount;
if (c < 0)
++nacount;
if (c != '\n')
continue;
++nlcount;
t = buf + i;
if (s && t - s > 120)
longline = true;
if (!s && i > 120)
longline = true;
s = t;
}
t = buf + i;
if (s && t - s > 120)
longline = true;
if (!s && i > 120)
longline = true;
debugPrint(6, "attaching %s length %d nonascii %d nulls %d longline %d",
file, buflen, nacount, nullcount, longline);
nacount += nullcount;
/* Set the type of attachment */
if (buflen > 20 && nacount * 5 > buflen) {
if (!ct)
ct = "application/octet-stream"; /* default type for binary */
}
if (!ct)
ct = "text/plain";
/* Criteria for base64 encode.
* files uploaded from a web form need not be encoded, unless they contain
* nulls, which is a quirk of my slapped together software. */
if (!webform && (buflen > 20 && nacount * 5 > buflen) ||
webform && nullcount) {
if (ismail) {
setError(MSG_MailBinary, file);
goto freefail;
}
s = base64Encode(buf, buflen, true);
nzFree(buf);
buf = s;
ce = "base64";
goto success;
}
if (!webform) {
/* Switch to unix newlines - we'll switch back to dos later. */
v = buf + buflen;
for (s = t = buf; s < v; ++s) {
c = *s;
if (c == '\r' && s < v - 1 && s[1] == '\n')
continue;
*t++ = c;
}
buflen = t - buf;
/* Do we need to use quoted-printable? */
/* Perhaps this hshould read (nacount > 0) */
if (nacount * 20 > buflen || nullcount || longline) {
char *newbuf;
int l, colno = 0, space = 0;
newbuf = initString(&l);
v = buf + buflen;
for (s = buf; s < v; ++s) {
c = *s;
/* do we have to =expand this character? */
if (c < '\n' && c != '\t' ||
c == '=' ||
c == '\xff' ||
(c == ' ' || c == '\t') && s < v - 1
&& s[1] == '\n') {
char expand[4];
sprintf(expand, "=%02X", (uchar) c);
stringAndString(&newbuf, &l, expand);
colno += 3;
} else {
stringAndChar(&newbuf, &l, c);
++colno;
}
if (c == '\n') {
colno = space = 0;
continue;
}
if (c == ' ' || c == '\t')
space = l;
if (colno < 72)
continue;
if (s == v - 1)
continue;
/* If newline's coming up anyways, don't force another one. */
if (s[1] == '\n')
continue;
i = l;
if (!space || space == i) {
stringAndString(&newbuf, &l, "=\n");
colno = space = 0;
continue;
}
colno = i - space;
stringAndString(&newbuf, &l, "**"); /* make room */
while (i > space) {
newbuf[i + 1] = newbuf[i - 1];
--i;
}
newbuf[space] = '=';
newbuf[space + 1] = '\n';
space = 0;
} /* loop over characters */
nzFree(buf);
buf = newbuf;
ce = "quoted-printable";
goto success;
}
}
buf[buflen] = 0;
ce = (nacount ? "8bit" : "7bit");
success:
debugPrint(6, "encoded %s %s length %d", ct, ce, strlen(buf));
*enc_p = ce;
*type_p = ct;
*data_p = buf;
return true;
freefail:
nzFree(buf);
return false;
} /* encodeAttachment */
static void isoDecode(char *vl, char **vrp)
{
char *vr = *vrp;
char *start, *end; /* section being decoded */
char *s, *t, c, d, code;
int len;
uchar val, leftover, mod;
start = vl;
restart:
start = strstr(start, "=?");
if (!start || start >= vr)
goto finish;
start += 2;
if (!memEqualCI(start, "iso-", 4) &&
!memEqualCI(start, "us-ascii", 8) &&
!memEqualCI(start, "utf-", 4) &&
!memEqualCI(start, "cp1252", 6) &&
!memEqualCI(start, "gb", 2) && !memEqualCI(start, "windows-", 8))
goto restart;
s = strchr(start, '?');
if (!s || s > vr - 5 || s[2] != '?')
goto restart;
code = s[1];
code = toupper(code);
if (code != 'Q' && code != 'B')
goto restart;
s += 3;
end = strstr(s, "?=");
if (!end || end > vr - 2)
goto restart;
t = start - 2;
if (code == 'Q') {
while (s < end) {
c = *s++;
if (c == '=') {
c = *s;
d = s[1];
if (isxdigit(c) && isxdigit(d)) {
d = fromHex(c, d);
*t++ = d;
s += 2;
continue;
}
c = '=';
}
*t++ = c;
}
goto copy;
}
/* base64 */
mod = 0;
for (; s < end; ++s) {
c = *s;
if (isspaceByte(c))
continue;
if (c == '=')
continue;
val = base64Bits(c);
if (val & 64)
val = 0; /* ignore errors here */
if (mod == 0) {
leftover = val << 2;
} else if (mod == 1) {
*t++ = (leftover | (val >> 4));
leftover = val << 4;
} else if (mod == 2) {