Struct yasna::BERReaderSeq [−][src]
pub struct BERReaderSeq<'a, 'b> where
'a: 'b, { /* fields omitted */ }
A reader object for a sequence of BER/DER-encoded ASN.1 data.
The main source of this object is the read_sequence
method from
BERReader
.
Examples
use yasna; let data = &[48, 6, 2, 1, 10, 1, 1, 255]; let asn = yasna::parse_der(data, |reader| { reader.read_sequence(|reader| { let i = reader.next().read_i64()?; let b = reader.next().read_bool()?; return Ok((i, b)); }) }).unwrap(); assert_eq!(asn, (10, true));
Implementations
impl<'a, 'b> BERReaderSeq<'a, 'b>
[src]
impl<'a, 'b> BERReaderSeq<'a, 'b>
[src]pub fn mode(&self) -> BERMode
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Tells which format we are parsing, BER or DER.
pub fn next<'c>(&'c mut self) -> BERReader<'a, 'c>
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Generates a new BERReader
.
pub fn read_optional<T, F>(&mut self, callback: F) -> ASN1Result<Option<T>> where
F: for<'c> FnOnce(BERReader<'a, 'c>) -> ASN1Result<T>,
[src]
F: for<'c> FnOnce(BERReader<'a, 'c>) -> ASN1Result<T>,
Tries to read an ASN.1 value. If it fails at the first tag,
it doesn’t consume buffer and returns None
.
Used to parse OPTIONAL elements.
Examples
use yasna; let data = &[48, 3, 1, 1, 255]; let asn = yasna::parse_der(data, |reader| { reader.read_sequence(|reader| { let i = reader.read_optional(|reader| { reader.read_i64() })?; let b = reader.next().read_bool()?; return Ok((i, b)); }) }).unwrap(); assert_eq!(asn, (None, true));
pub fn read_default<T, F>(&mut self, default: T, callback: F) -> ASN1Result<T> where
F: for<'c> FnOnce(BERReader<'a, 'c>) -> ASN1Result<T>,
T: Eq,
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F: for<'c> FnOnce(BERReader<'a, 'c>) -> ASN1Result<T>,
T: Eq,
Similar to read_optional
, but uses default
if it fails.
T: Eq
is required because it fails in DER mode if the read value
is equal to default
.
Used to parse DEFAULT elements.
Examples
use yasna; let data = &[48, 3, 1, 1, 255]; let asn = yasna::parse_der(data, |reader| { reader.read_sequence(|reader| { let i = reader.read_default(10, |reader| { reader.read_i64() })?; let b = reader.next().read_bool()?; return Ok((i, b)); }) }).unwrap(); assert_eq!(asn, (10, true));
pub fn read_with_buffer<T, F>(
&mut self,
callback: F
) -> ASN1Result<(T, &'a [u8])> where
F: for<'c> FnOnce(&mut BERReaderSeq<'a, 'c>) -> ASN1Result<T>,
[src]
&mut self,
callback: F
) -> ASN1Result<(T, &'a [u8])> where
F: for<'c> FnOnce(&mut BERReaderSeq<'a, 'c>) -> ASN1Result<T>,
Trait Implementations
Auto Trait Implementations
impl<'a, 'b> RefUnwindSafe for BERReaderSeq<'a, 'b>
impl<'a, 'b> RefUnwindSafe for BERReaderSeq<'a, 'b>
impl<'a, 'b> Send for BERReaderSeq<'a, 'b>
impl<'a, 'b> Send for BERReaderSeq<'a, 'b>
impl<'a, 'b> Sync for BERReaderSeq<'a, 'b>
impl<'a, 'b> Sync for BERReaderSeq<'a, 'b>
impl<'a, 'b> Unpin for BERReaderSeq<'a, 'b> where
'a: 'b,
impl<'a, 'b> Unpin for BERReaderSeq<'a, 'b> where
'a: 'b,
impl<'a, 'b> !UnwindSafe for BERReaderSeq<'a, 'b>
impl<'a, 'b> !UnwindSafe for BERReaderSeq<'a, 'b>