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subtlecrypto: Don't throw exceptions twice when converting to Algorithm object (#34239)

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* Don't throw exceptions twice when converting to Algorithm object

Removes match statements like
```rust
let Ok(ConversionResult::Success(algorithm)) = Algorithm::new(cx, value.handle())
else {
    return Err(Error::Syntax);
};
```
These don't cause issues if `Algorithm::new` returns `Ok(ConversionResult::Failure`,
but in the case of `Err(())` the implementation already called `throw_type_error`
and we must not throw an additional Syntax error, otherwise we'll crash.

Luckily, this case is already handled elsewhere by the
`value_from_js_object` macro.

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Test that calling subtlecrypto methods with empty algorithm objects throws a TypeError

The WebCryptoAPI spec does not tell us which error to throw exactly, but
according to https://webidl.spec.whatwg.org/ it should be a TypeError.

This previously crashed servo.

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

---------

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>
This commit is contained in:
Simon Wülker 2024-11-16 00:15:32 +01:00 • committed by GitHub
parent 7ae0459360
commit ee63174d6f
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
5 changed files with 47 additions and 28 deletions
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32
components/script/dom/subtlecrypto.rs
View file

@ -1126,10 +1126,7 @@ fn normalize_algorithm_for_get_key_length(
match algorithm {
AlgorithmIdentifier::Object(obj) => {
rooted!(in(*cx) let value = ObjectValue(obj.get()));
let Ok(ConversionResult::Success(algorithm)) = Algorithm::new(cx, value.handle())
else {
return Err(Error::Syntax);
};
let algorithm = value_from_js_object!(Algorithm, cx, value);
let name = algorithm.name.str();
let normalized_algorithm = if name.eq_ignore_ascii_case(ALG_AES_CBC) ||
@ -1162,10 +1159,7 @@ fn normalize_algorithm_for_digest(
let name = match algorithm {
AlgorithmIdentifier::Object(obj) => {
rooted!(in(*cx) let value = ObjectValue(obj.get()));
let Ok(ConversionResult::Success(algorithm)) = Algorithm::new(cx, value.handle())
else {
return Err(Error::Syntax);
};
let algorithm = value_from_js_object!(Algorithm, cx, value);
algorithm.name.str().to_uppercase()
},
@ -1191,10 +1185,7 @@ fn normalize_algorithm_for_import_key(
let name = match algorithm {
AlgorithmIdentifier::Object(obj) => {
rooted!(in(*cx) let value = ObjectValue(obj.get()));
let Ok(ConversionResult::Success(algorithm)) = Algorithm::new(cx, value.handle())
else {
return Err(Error::Syntax);
};
let algorithm = value_from_js_object!(Algorithm, cx, value);
let name = algorithm.name.str().to_uppercase();
if name == ALG_HMAC {
@ -1230,9 +1221,7 @@ fn normalize_algorithm_for_derive_bits(
};
rooted!(in(*cx) let value = ObjectValue(obj.get()));
let Ok(ConversionResult::Success(algorithm)) = Algorithm::new(cx, value.handle()) else {
return Err(Error::Syntax);
};
let algorithm = value_from_js_object!(Algorithm, cx, value);
let normalized_algorithm = if algorithm.name.str().eq_ignore_ascii_case(ALG_PBKDF2) {
let params = value_from_js_object!(Pbkdf2Params, cx, value);
@ -1260,9 +1249,7 @@ fn normalize_algorithm_for_encrypt_or_decrypt(
};
rooted!(in(*cx) let value = ObjectValue(obj.get()));
let Ok(ConversionResult::Success(algorithm)) = Algorithm::new(cx, value.handle()) else {
return Err(Error::Syntax);
};
let algorithm = value_from_js_object!(Algorithm, cx, value);
let name = algorithm.name.str();
let normalized_algorithm = if name.eq_ignore_ascii_case(ALG_AES_CBC) {
@ -1287,10 +1274,7 @@ fn normalize_algorithm_for_sign_or_verify(
let name = match algorithm {
AlgorithmIdentifier::Object(obj) => {
rooted!(in(*cx) let value = ObjectValue(obj.get()));
let Ok(ConversionResult::Success(algorithm)) = Algorithm::new(cx, value.handle())
else {
return Err(Error::Syntax);
};
let algorithm = value_from_js_object!(Algorithm, cx, value);
algorithm.name.str().to_uppercase()
},
@ -1316,9 +1300,7 @@ fn normalize_algorithm_for_generate_key(
};
rooted!(in(*cx) let value = ObjectValue(obj.get()));
let Ok(ConversionResult::Success(algorithm)) = Algorithm::new(cx, value.handle()) else {
return Err(Error::Syntax);
};
let algorithm = value_from_js_object!(Algorithm, cx, value);
let name = algorithm.name.str();
let normalized_algorithm =