pub struct Contents { /* private fields */ }Expand description
Contents owns ContentsRef and represents contents octets of ASN.1.
The structure of Contents is similar to that of Vec<u8>.
The user can access the inner ContentsRef via the Deref and DerefMut implementations.
Methods from Deref<Target = ContentsRef>§
sourcepub fn len(&self) -> usize
pub fn len(&self) -> usize
Returns the byte count of the inner slice.
§Example
use bsn1::ContentsRef;
let bytes = &[0, 1, 2, 3, 4];
let contents = <&ContentsRef>::from(bytes);
assert_eq!(contents.len(), bytes.len());sourcepub fn is_empty(&self) -> bool
pub fn is_empty(&self) -> bool
Returns true if the inner slice is empty, or false.
§Example
use bsn1::ContentsRef;
let bytes = &[];
let contents = <&ContentsRef>::from(bytes);
assert_eq!(contents.is_empty(), true);
let bytes = &[0, 1, 2, 3, 4];
let contents = <&ContentsRef>::from(bytes);
assert_eq!(contents.is_empty(), false);sourcepub fn to_integer<T>(&self) -> Result<T, Error>where
T: PrimInt,
pub fn to_integer<T>(&self) -> Result<T, Error>where
T: PrimInt,
Parses self as the ASN.1 contents of integer.
Type T should be a built-in primitive integer type (e.g., u8, i32, isize, i128…)
§Examples
use bsn1::{Contents, ContentsRef};
let contents = Contents::from(17_i32);
assert_eq!(Ok(17_i32), contents.to_integer::<i32>());
// Overflow to convert i32::MAX into i16.
let contents = Contents::from(i32::MAX);
assert!(contents.to_integer::<i16>().is_err());
// Cannot convert a negatibe value into unsigned type.
let contents = Contents::from(-5_i32);
assert!(contents.to_integer::<u32>().is_err());sourcepub unsafe fn to_integer_unchecked<T>(&self) -> Twhere
T: PrimInt,
pub unsafe fn to_integer_unchecked<T>(&self) -> Twhere
T: PrimInt,
Parses self as a contents of ASN.1 integer without any check.
Type T should be a built-in primitive integer type (e.g., u8, i32, isize, u128, …)
§Safety
The behaviour is undefined in the following cases.
selfis not formatted as the contents of ASN.1 integer.- The value is greater than the max value of
T, or less than the min value ofT.
sourcepub fn to_bool_ber(&self) -> Result<bool, Error>
pub fn to_bool_ber(&self) -> Result<bool, Error>
Parses self as the contents of BER bool.
§Warnings
The rule of BER bool is different from that of DER and CER.
BER regards 0x00 as False, and any octet except for 0x00 as True.
See also to_bool_der.
§Examples
use bsn1::ContentsRef;
let true_contents = <&ContentsRef>::from(true);
assert_eq!(Ok(true), true_contents.to_bool_ber());
let false_contents = <&ContentsRef>::from(false);
assert_eq!(Ok(false), false_contents.to_bool_ber());sourcepub fn to_bool_der(&self) -> Result<bool, Error>
pub fn to_bool_der(&self) -> Result<bool, Error>
Parses self as the contents of DER bool.
§Warnings
The rule of BER bool is different from that of DER and CER.
DER regards 0xFF as True, and 0x00 as False.
See also to_bool_ber.
§Examples
use bsn1::ContentsRef;
let true_contents = <&ContentsRef>::from(true);
assert_eq!(Ok(true), true_contents.to_bool_der());
let false_contents = <&ContentsRef>::from(false);
assert_eq!(Ok(false), false_contents.to_bool_der());