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der: add ber feature - #1948
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tarcieri
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Jul 16, 2025
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| oid = ["dep:const-oid"] | ||
| pem = ["dep:pem-rfc7468", "alloc", "zeroize"] | ||
| real = [] | ||
| ber = ["alloc"] |
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I missed this... why are you enabling alloc?
Edit: opened #1950
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Reading constructed octet string requires Vec::new
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Yes, but that's impl'd in the OctetString type, which is already gated on alloc
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Oh
formats/der/src/length/indefinite.rs
Line 86 in bd84063
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That method is likewise gated on alloc already
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## Added - Custom error types support to the `Decode` and `DecodeValue` traits (#1055) - `EncodingRules` enum (#1321) - `Decode::from_ber` (#1389) - Documentation for field-level `tag_mode` attribute (#1401) - `Hash` implementation for `AlgorithmIdentifier` (#1414) - `SequenceRef::as_bytes` and `AsRef<[u8]>` impl (#1454) - `Reader::peek_into` (#1478) - `GeneralString` variant to `Tag` (#1512) - Conversions from `OctetString(Ref)` to `Vec`/`Bytes` (#1540) - Custom error types in derive macros (#1560) - Support for tags beyond 30 (#1651) - Const `::new` to `Length`, `BytesRef`, and `AnyRef` (#1713) - Const `GeneralizedTime::from_date_time` (#1718) - `Decode::from_der_partial` (#1725) - Conversions between `BitStringRef`/`OctetStringRef` and `[u8; N]` (#1731) - Add class bits consts for Application and Private tag support (#1721) - conversions between `heapless:Vec<u8>` and `OctetStringRef` (#1735) - `IsConstructed` trait, impl'ed on any `FixedTag` (#1744) - Implement `Hash` for `SetOf` (#1764) - Implement `Uint`/`Int` conversions from native types (#1762) - Support for `APPLICATION`, `CONTEXT-SPECIFIC` and `PRIVATE` tags (#1819, #1825, #1944) - Support `Cow<[u8]>` in `derive(Sequence)` (#1850) - `diagnostic::on_unimplemented` attributes (#1876) - `Reader::read_value`, auto-nest `DecodeValue` (#1877, #1895, #1897, #1901) - Indefinite length support for BER (#1884, #1885, #1894, #1900, #1902, #1910) - Constructed OctetString support (#1899, #1922) - string conversions, predicate methods for EncodingRules (#1903, #1953) - `Any::header` (#1935) - `Tag::RelativeOid` (#1942) - `ber` feature (#1948, #1950) - Hash derive for `StringOwned` and `Ia5String` (#1973) - Implement `DecodeValue/EncodeValue/Tagged` for `Cow` (#2093) - Add doc examples for `EncodeValue`, `Encode`, `DecodeValue`, `Decode`, `Error`, `ErrorKind`, `Tagged`, `FixedTag`, `IsConstructed`, `Tag`, `Length`, `Header` (#2075, #2071, #2070, #2064, #2058, #2052, #2053, #2051) - `SequenceRef::new` (#2224) ## Changed - Return `Tag::Integer.length_error()` on empty ints (#1400) - Allow all blanket impls on `?Sized` types (#1451) - Refactor `Tag::peek` (#1479) - Refactor `Header::peek` (#1480) - Use `core::error::Error` (#1553) - Use 2024 edition, bump MSRV to 1.85 (#1670) - Bump `const-oid` to v0.10 (#1676) - Reject zero lengths reads (#1716) - Deprecate `TagNumber::new` (#1727) - Use strict context-specific skipping condition (equal tag numbers only) (#1740) - Const `Any::to_ref`, `BytesOwned::to_ref` (#1797) - Return `ErrorKind::Noncanonical` in `EXPLICIT` when primitive (#1818) - Use `read_nested` to check length of `IMPLICIT` types (#1739) - Simplify `From<&UintRef<'a>>` for `Uint` (#1840) - Make `ObjectIdentifier<MAX_SIZE>` impls generic (#1851) - Extract `reader::position::Position` (#1880) - Make `Reader` cloneable (#1883) - Simplify `Header::peek` and `Tag::peek` (#1886) - Improve constructed bit handling (#1919) - Use fat pointer in `OctetStringRef`, consolidate bytes/string modules, improve internal ref types (#1920, #1921, #1998, #2040) - Change constructor `Header::new`, add `Header::with_length`, tests for constructed octet string (#1931, #1930) - Simplify `der_cmp` for `Length` (#1997) - Rename variable encoder -> writer and improve example (#2078) - Have `PemReader` decode to `Cow::Owned` (#2094) - Only sort `SET OF` types with `EncodingRules::Der` (#2219) - `SetOf` and `SequenceOf` now require `heapless` feature (#2220, #2229) ## Fixed - Append in `Encode::encode_to_vec` (#1760) - Derive optional OCTET/BIT STRING on `Option<&[u8]>` (#1737) - X.680 tag order: compare class and number first (#1790) - BMPString compatibility in derive macros (#1793) - `Tag::peek_optional` for 6-byte and 7+ byte tags (#1804) - `Header::peek` for 11-byte tag-lengths (#1828) - Panic in `value_cmp`: add `Iterator::size_hint` (#1830) - Error position tracking improvements (#1889, #2080, #2079) - Bound `Decode(Value)::Error` on `core::error::Error` (#2137) - Have `SetOf(Vec)::insert` check for duplicates (#2217) ## Removed - `TagNumber::N0..N30` consts (#1724) - 256MiB limit on `Length` (#1726) - Generic `<T>` from `Reader::finish` (#1833) - Deprecated `SetOf(Vec)::add` methods (#2232) - `SequenceRef` lifetime (#2224)
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As noted in #1934, there is noticeable performance impact of adding
indefinite: boolfield toLength.This PR allows to disable BER decoder.