Expand description
BER encoding for various strings types.
This module provides type that match the various string encodings provided by ASN.1 and BER.
There are two types of strings for binary data. OctetStrings contain
a unrestricted sequence of octets while BitStrings contain a sequence
of bits that does not need to be of a length divisible by eight.
In addition, there are a number of so-called restricted character strings that each conain a sequence of characters according to a pre-defined character set. ASN.1 defines quite a few of those of which the crate currently only implements a subset that is commonly in use. Specifically:
Ia5Stringcontains ASCII characters only (IA5 is an alternative name for ASCII),NumericStringcontains only decimals digits and spaces,PrintableStringcontains a subset of ASCII characters including letters, digits, and a few symbols,Utf8Stringcontains a sequence of Unicode code points encoded as octets through UTF-8.
All of these are implemented atop a generic RestrictedString by
providing an implementation for the CharSet trait.
Structs§
- BitString
- A bit string value.
- BitString
Iter - An iterator over the octets in the bit string.
- Char
SetError - An illegal value was encountered during character set conversion.
- Octet
String - An octet string value.
- Octet
String Encoder - A value encoder for an octet string.
- Octet
String Iter - An iterator over the segments of an octet string.
- Octet
String Octets - An iterator over the octets in an octet string.
- Octet
String Source - A decode source atop an octet string.
- Restricted
String - A generic restricted character string.
- Restricted
String Chars - An iterator over the characters in a restricted character string.
- Wrapping
Octet String Encoder - A value encoder that wraps the encoded inner values into an octet string.
Traits§
- CharSet
- The character set of a restricted character string type.
Type Aliases§
- Ia5String
- A restricted character string containing ASCII characters.
- Numeric
String - A restricted character string containing only digits and spaces.
- Printable
String - A restricted character string allowing a subset of ASCII characters.
- Utf8
String - A restricted character string containing UTF-8 encoded characters.