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Add non-PRODUCTION/TESTING overflow asserts to various string helper-functions (issue 6759)

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This commit is contained in:
Jonas Jenwald 2021-06-27 15:19:02 +02:00
parent d644b66c72
commit 273d8cb746
6 changed files with 52 additions and 4 deletions
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20
src/core/fonts.js
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@ -257,10 +257,28 @@ function int32(b0, b1, b2, b3) {
}
function string16(value) {
if (
typeof PDFJSDev === "undefined" ||
PDFJSDev.test("!PRODUCTION || TESTING")
) {
assert(
typeof value === "number" && Math.abs(value) < 2 ** 16,
`string16: Unexpected input "${value}".`
);
}
return String.fromCharCode((value >> 8) & 0xff, value & 0xff);
}
function safeString16(value) {
if (
typeof PDFJSDev === "undefined" ||
PDFJSDev.test("!PRODUCTION || TESTING")
) {
assert(
typeof value === "number" && !Number.isNaN(value),
`safeString16: Unexpected input "${value}".`
);
}
// clamp value to the 16-bit int range
if (value > 0x7fff) {
value = 0x7fff;
@ -751,7 +769,7 @@ function createPostTable(properties) {
string32(angle) + // italicAngle
"\x00\x00" + // underlinePosition
"\x00\x00" + // underlineThickness
string32(properties.fixedPitch) + // isFixedPitch
string32(properties.fixedPitch ? 1 : 0) + // isFixedPitch
"\x00\x00\x00\x00" + // minMemType42
"\x00\x00\x00\x00" + // maxMemType42
"\x00\x00\x00\x00" + // minMemType1