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[network] Align cookie checks with RFC 6265 (bis)

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Moonchild 2022-12-15 12:30:21 +00:00 • committed by roytam1
commit f54f007d47
1 changed files with 5 additions and 16 deletions
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21
netwerk/cookie/nsCookieService.cpp
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@ -3356,25 +3356,14 @@ nsCookieService::SetCookieInternal(nsIURI *aHostURI,
// Reject cookie if value contains an RFC 6265 disallowed character.
// See RFC 6265 section 4.1.1
// XXX: For now we allow for web compatibility (see issue #357):
// 0x20 (Space)
// 0x22 (DQUOTE)
// 0x2C (Comma)
// 0x5C (Backslash)
// 0x09 (htab) Explicitly allowed per RFC 6265 (bis) section 5.6. Chrome erroneously rejects this.
// 0x3B (;) forbidden to avoid cookie-spoofing by adding a separator inside a name or value
//
// FIXME: Before removing DQUOTE from the exceptions list:
// DQUOTE *cookie-octet DQUOTE is permitted and would fail if just removed.
// This needs better checking for first and last character allowing
// DQUOTE but not in the actual value.
//
// This only applies to cookies set via the Set-Cookie header, since
// document.cookie is defined to be UTF-8.
const char illegalCharacters[] = {
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x0A, 0x0B,
0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, /* 0x20, 0x22, */
/* 0x2C, */ 0x3B, /* 0x5C, */ 0x7F, 0x00 };
if (aFromHttp && (cookieAttributes.value.FindCharInSet(illegalCharacters, 0) != -1)) {
0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x3B, 0x7F, 0x00 };
if (cookieAttributes.value.FindCharInSet(illegalCharacters, 0) != -1) {
COOKIE_LOGFAILURE(SET_COOKIE, aHostURI, savedCookieHeader, "invalid value character");
return newCookie;
}