Function x509_parser::parse_ext_basicconstraints

pub fn parse_ext_basicconstraints(
    i: &[u8]
) -> IResult<&[u8], BasicConstraints, BerError>

Parse a "Basic Constraints" extension

  id-ce-basicConstraints OBJECT IDENTIFIER ::=  { id-ce 19 }
  BasicConstraints ::= SEQUENCE {
       cA                      BOOLEAN DEFAULT FALSE,
       pathLenConstraint       INTEGER (0..MAX) OPTIONAL }

Note the maximum length of the pathLenConstraint field is limited to the size of a 32-bits unsigned integer, and parsing will fail if value if larger.