const_oid/
error.rs

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1//! Error types
2
3use crate::Arc;
4use core::fmt;
5
6/// Result type
7pub type Result<T> = core::result::Result<T, Error>;
8
9/// OID errors.
10#[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord)]
11pub enum Error {
12    /// Arc exceeds allowed range (i.e. for first or second OID)
13    ArcInvalid {
14        /// Arc value that is erroneous.
15        arc: Arc,
16    },
17
18    /// Arc is too big (exceeds 32-bit limits of this library).
19    ///
20    /// Technically the size of an arc is not constrained by X.660, however
21    /// this library has elected to use `u32` as the arc representation as
22    /// sufficient for PKIX/PKCS usages.
23    ArcTooBig,
24
25    /// Base 128 encoding error (used in BER/DER serialization of arcs).
26    Base128,
27
28    /// Expected a digit, but was provided something else.
29    DigitExpected {
30        /// What was found instead of a digit
31        actual: u8,
32    },
33
34    /// Input data is empty.
35    Empty,
36
37    /// OID length is invalid (too short or too long).
38    Length,
39
40    /// Minimum 3 arcs required.
41    NotEnoughArcs,
42
43    /// Trailing `.` character at end of input.
44    TrailingDot,
45}
46
47impl Error {
48    /// Escalate this error into a panic.
49    ///
50    /// This is a workaround until `Result::unwrap` is allowed in `const fn`.
51    #[allow(clippy::panic)]
52    pub(crate) const fn panic(self) -> ! {
53        match self {
54            Error::ArcInvalid { .. } | Error::ArcTooBig => panic!("OID contains invalid arc"),
55            Error::Base128 => panic!("OID contains arc with invalid base 128 encoding"),
56            Error::DigitExpected { .. } => panic!("OID expected to start with digit"),
57            Error::Empty => panic!("OID value is empty"),
58            Error::Length => panic!("OID length invalid"),
59            Error::NotEnoughArcs => panic!("OID requires minimum of 3 arcs"),
60            Error::TrailingDot => panic!("OID ends with invalid trailing '.'"),
61        }
62    }
63}
64
65impl fmt::Display for Error {
66    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
67        match *self {
68            Error::ArcInvalid { arc } => write!(f, "OID contains out-of-range arc: {}", arc),
69            Error::ArcTooBig => f.write_str("OID contains arc which is larger than 32-bits"),
70            Error::Base128 => f.write_str("OID contains arc with invalid base 128 encoding"),
71            Error::DigitExpected { actual } => {
72                write!(f, "expected digit, got '{}'", char::from(actual))
73            }
74            Error::Empty => f.write_str("OID value is empty"),
75            Error::Length => f.write_str("OID length invalid"),
76            Error::NotEnoughArcs => f.write_str("OID requires minimum of 3 arcs"),
77            Error::TrailingDot => f.write_str("OID ends with invalid trailing '.'"),
78        }
79    }
80}
81
82#[cfg(feature = "std")]
83impl std::error::Error for Error {}
const_oid/error.rs

const_oid/
error.rs
