/rust/registry/src/index.crates.io-1949cf8c6b5b557f/rustls-webpki-0.102.8/src/error.rs

Source
// Copyright 2015 Brian Smith.
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

use core::fmt;
use core::ops::ControlFlow;

/// An error that occurs during certificate validation or name validation.
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
#[non_exhaustive]
pub enum Error {
    /// The encoding of some ASN.1 DER-encoded item is invalid.
    BadDer,

    /// The encoding of an ASN.1 DER-encoded time is invalid.
    BadDerTime,

    /// A CA certificate is being used as an end-entity certificate.
    CaUsedAsEndEntity,

    /// The certificate is expired; i.e. the time it is being validated for is
    /// later than the certificate's notAfter time.
    CertExpired,

    /// The certificate is not valid for the name it is being validated for.
    CertNotValidForName,

    /// The certificate is not valid yet; i.e. the time it is being validated
    /// for is earlier than the certificate's notBefore time.
    CertNotValidYet,

    /// The certificate, or one of its issuers, has been revoked.
    CertRevoked,

    /// The CRL is expired; i.e. the verification time is not before the time
    /// in the CRL nextUpdate field.
    CrlExpired,

    /// An end-entity certificate is being used as a CA certificate.
    EndEntityUsedAsCa,

    /// An X.509 extension is invalid.
    ExtensionValueInvalid,

    /// The certificate validity period (notBefore, notAfter) is invalid; e.g.
    /// the notAfter time is earlier than the notBefore time.
    InvalidCertValidity,

    /// A CRL number extension was invalid:
    ///  - it was mis-encoded
    ///  - it was negative
    ///  - it was too long
    InvalidCrlNumber,

    /// A iPAddress name constraint was invalid:
    /// - it had a sparse network mask (ie, cannot be written in CIDR form).
    /// - it was too long or short
    InvalidNetworkMaskConstraint,

    /// A serial number was invalid:
    ///  - it was misencoded
    ///  - it was negative
    ///  - it was too long
    InvalidSerialNumber,

    /// The CRL signature is invalid for the issuer's public key.
    InvalidCrlSignatureForPublicKey,

    /// The signature is invalid for the given public key.
    InvalidSignatureForPublicKey,

    /// A CRL was signed by an issuer that has a KeyUsage bitstring that does not include
    /// the cRLSign key usage bit.
    IssuerNotCrlSigner,

    /// A presented or reference DNS identifier was malformed, potentially
    /// containing invalid characters or invalid labels.
    MalformedDnsIdentifier,

    /// The certificate extensions are malformed.
    ///
    /// In particular, webpki requires the DNS name(s) be in the subjectAltName
    /// extension as required by the CA/Browser Forum Baseline Requirements
    /// and as recommended by RFC6125.
    MalformedExtensions,

    /// A name constraint was malformed, potentially containing invalid characters or
    /// invalid labels.
    MalformedNameConstraint,

    /// The maximum number of name constraint comparisons has been reached.
    MaximumNameConstraintComparisonsExceeded,

    /// The maximum number of internal path building calls has been reached. Path complexity is too great.
    MaximumPathBuildCallsExceeded,

    /// The path search was terminated because it became too deep.
    MaximumPathDepthExceeded,

    /// The maximum number of signature checks has been reached. Path complexity is too great.
    MaximumSignatureChecksExceeded,

    /// The certificate violates one or more name constraints.
    NameConstraintViolation,

    /// The certificate violates one or more path length constraints.
    PathLenConstraintViolated,

    /// The certificate is not valid for the Extended Key Usage for which it is
    /// being validated.
    RequiredEkuNotFound,

    /// The algorithm in the TBSCertificate "signature" field of a certificate
    /// does not match the algorithm in the signature of the certificate.
    SignatureAlgorithmMismatch,

    /// Trailing data was found while parsing DER-encoded input for the named type.
    TrailingData(DerTypeId),

    /// A valid issuer for the certificate could not be found.
    UnknownIssuer,

    /// The certificate's revocation status could not be determined.
    UnknownRevocationStatus,

    /// The certificate is not a v3 X.509 certificate.
    ///
    /// This error may be also reported if the certificate version field
    /// is malformed.
    UnsupportedCertVersion,

    /// The certificate contains an unsupported critical extension.
    UnsupportedCriticalExtension,

    /// The CRL contains an issuing distribution point with no distribution point name,
    /// or a distribution point name relative to an issuer.
    UnsupportedCrlIssuingDistributionPoint,

    /// The CRL is not a v2 X.509 CRL.
    ///
    /// The RFC 5280 web PKI profile mandates only version 2 be used. See section
    /// 5.1.2.1 for more information.
    ///
    /// This error may also be reported if the CRL version field is malformed.
    UnsupportedCrlVersion,

    /// The CRL is an unsupported "delta" CRL.
    UnsupportedDeltaCrl,

    /// The CRL contains unsupported "indirect" entries.
    UnsupportedIndirectCrl,

    /// The `ServerName` contained an unsupported type of value.
    UnsupportedNameType,

    /// The revocation reason is not in the set of supported revocation reasons.
    UnsupportedRevocationReason,

    /// The CRL is partitioned by revocation reasons.
    UnsupportedRevocationReasonsPartitioning,

    /// The signature algorithm for a signature over a CRL is not in the set of supported
    /// signature algorithms given.
    UnsupportedCrlSignatureAlgorithm,

    /// The signature algorithm for a signature is not in the set of supported
    /// signature algorithms given.
    UnsupportedSignatureAlgorithm,

    /// The CRL signature's algorithm does not match the algorithm of the issuer
    /// public key it is being validated for. This may be because the public key
    /// algorithm's OID isn't recognized (e.g. DSA), or the public key
    /// algorithm's parameters don't match the supported parameters for that
    /// algorithm (e.g. ECC keys for unsupported curves), or the public key
    /// algorithm and the signature algorithm simply don't match (e.g.
    /// verifying an RSA signature with an ECC public key).
    UnsupportedCrlSignatureAlgorithmForPublicKey,

    /// The signature's algorithm does not match the algorithm of the public
    /// key it is being validated for. This may be because the public key
    /// algorithm's OID isn't recognized (e.g. DSA), or the public key
    /// algorithm's parameters don't match the supported parameters for that
    /// algorithm (e.g. ECC keys for unsupported curves), or the public key
    /// algorithm and the signature algorithm simply don't match (e.g.
    /// verifying an RSA signature with an ECC public key).
    UnsupportedSignatureAlgorithmForPublicKey,
}

impl Error {
    // Compare the Error with the new error by rank, returning the higher rank of the two as
    // the most specific error.
    pub(crate) fn most_specific(self, new: Self) -> Self {
        // Assign an error a numeric value ranking it by specificity.
        if self.rank() >= new.rank() {
            self
        } else {
            new
        }
    }

    // Return a numeric indication of how specific the error is, where an error with a higher rank
    // is considered more useful to an end user than an error with a lower rank. This is used by
    // Error::most_specific to compare two errors in order to return which is more specific.
    #[allow(clippy::as_conversions)] // We won't exceed u32 errors.
    pub(crate) fn rank(&self) -> u32 {
        match &self {
            // Errors related to certificate validity
            Self::CertNotValidYet | Self::CertExpired => 290,
            Self::CertNotValidForName => 280,
            Self::CertRevoked | Self::UnknownRevocationStatus | Self::CrlExpired => 270,
            Self::InvalidCrlSignatureForPublicKey | Self::InvalidSignatureForPublicKey => 260,
            Self::SignatureAlgorithmMismatch => 250,
            Self::RequiredEkuNotFound => 240,
            Self::NameConstraintViolation => 230,
            Self::PathLenConstraintViolated => 220,
            Self::CaUsedAsEndEntity | Self::EndEntityUsedAsCa => 210,
            Self::IssuerNotCrlSigner => 200,

            // Errors related to supported features used in an invalid way.
            Self::InvalidCertValidity => 190,
            Self::InvalidNetworkMaskConstraint => 180,
            Self::InvalidSerialNumber => 170,
            Self::InvalidCrlNumber => 160,

            // Errors related to unsupported features.
            Self::UnsupportedCrlSignatureAlgorithmForPublicKey
            | Self::UnsupportedSignatureAlgorithmForPublicKey => 150,
            Self::UnsupportedCrlSignatureAlgorithm | Self::UnsupportedSignatureAlgorithm => 140,
            Self::UnsupportedCriticalExtension => 130,
            Self::UnsupportedCertVersion => 130,
            Self::UnsupportedCrlVersion => 120,
            Self::UnsupportedDeltaCrl => 110,
            Self::UnsupportedIndirectCrl => 100,
            Self::UnsupportedNameType => 95,
            Self::UnsupportedRevocationReason => 90,
            Self::UnsupportedRevocationReasonsPartitioning => 80,
            Self::UnsupportedCrlIssuingDistributionPoint => 70,
            Self::MaximumPathDepthExceeded => 61,

            // Errors related to malformed data.
            Self::MalformedDnsIdentifier => 60,
            Self::MalformedNameConstraint => 50,
            Self::MalformedExtensions | Self::TrailingData(_) => 40,
            Self::ExtensionValueInvalid => 30,

            // Generic DER errors.
            Self::BadDerTime => 20,
            Self::BadDer => 10,

            // Special case errors - not subject to ranking.
            Self::MaximumSignatureChecksExceeded => 0,
            Self::MaximumPathBuildCallsExceeded => 0,
            Self::MaximumNameConstraintComparisonsExceeded => 0,

            // Default catch all error - should be renamed in the future.
            Self::UnknownIssuer => 0,
        }
    }

    /// Returns true for errors that should be considered fatal during path building. Errors of
    /// this class should halt any further path building and be returned immediately.
    #[inline]
    pub(crate) fn is_fatal(&self) -> bool {
        matches!(
            self,
            Self::MaximumSignatureChecksExceeded
                | Self::MaximumPathBuildCallsExceeded
                | Self::MaximumNameConstraintComparisonsExceeded
        )
    }
}

impl From<Error> for ControlFlow<Error, Error> {
    fn from(value: Error) -> Self {
        match value {
            // If an error is fatal, we've exhausted the potential for continued search.
            err if err.is_fatal() => Self::Break(err),
            // Otherwise we've rejected one candidate chain, but may continue to search for others.
            err => Self::Continue(err),
        }
    }
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{:?}", self)
    }
}

#[cfg(feature = "std")]
impl ::std::error::Error for Error {}

/// Trailing data was found while parsing DER-encoded input for the named type.
#[allow(missing_docs)]
#[non_exhaustive]
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub enum DerTypeId {
    BitString,
    Bool,
    Certificate,
    CertificateExtensions,
    CertificateTbsCertificate,
    CertRevocationList,
    CertRevocationListExtension,
    CrlDistributionPoint,
    CommonNameInner,
    CommonNameOuter,
    DistributionPointName,
    Extension,
    GeneralName,
    RevocationReason,
    Signature,
    SignatureAlgorithm,
    SignedData,
    SubjectPublicKeyInfo,
    Time,
    TrustAnchorV1,
    TrustAnchorV1TbsCertificate,
    U8,
    RevokedCertificate,
    RevokedCertificateExtension,
    RevokedCertEntry,
    IssuingDistributionPoint,
}

Coverage Report

Created: 2025-10-29 07:05

Line	Count	Source
1		// Copyright 2015 Brian Smith.
2		//
3		// Permission to use, copy, modify, and/or distribute this software for any
4		// purpose with or without fee is hereby granted, provided that the above
5		// copyright notice and this permission notice appear in all copies.
6		//
7		// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
8		// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9		// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
10		// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11		// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
12		// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
13		// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
14
15		use core::fmt;
16		use core::ops::ControlFlow;
17
18		/// An error that occurs during certificate validation or name validation.
19		#[derive(Clone, Copy, Debug, PartialEq, Eq)]
20		#[non_exhaustive]
21		pub enum Error {
22		/// The encoding of some ASN.1 DER-encoded item is invalid.
23		BadDer,
24
25		/// The encoding of an ASN.1 DER-encoded time is invalid.
26		BadDerTime,
27
28		/// A CA certificate is being used as an end-entity certificate.
29		CaUsedAsEndEntity,
30
31		/// The certificate is expired; i.e. the time it is being validated for is
32		/// later than the certificate's notAfter time.
33		CertExpired,
34
35		/// The certificate is not valid for the name it is being validated for.
36		CertNotValidForName,
37
38		/// The certificate is not valid yet; i.e. the time it is being validated
39		/// for is earlier than the certificate's notBefore time.
40		CertNotValidYet,
41
42		/// The certificate, or one of its issuers, has been revoked.
43		CertRevoked,
44
45		/// The CRL is expired; i.e. the verification time is not before the time
46		/// in the CRL nextUpdate field.
47		CrlExpired,
48
49		/// An end-entity certificate is being used as a CA certificate.
50		EndEntityUsedAsCa,
51
52		/// An X.509 extension is invalid.
53		ExtensionValueInvalid,
54
55		/// The certificate validity period (notBefore, notAfter) is invalid; e.g.
56		/// the notAfter time is earlier than the notBefore time.
57		InvalidCertValidity,
58
59		/// A CRL number extension was invalid:
60		/// - it was mis-encoded
61		/// - it was negative
62		/// - it was too long
63		InvalidCrlNumber,
64
65		/// A iPAddress name constraint was invalid:
66		/// - it had a sparse network mask (ie, cannot be written in CIDR form).
67		/// - it was too long or short
68		InvalidNetworkMaskConstraint,
69
70		/// A serial number was invalid:
71		/// - it was misencoded
72		/// - it was negative
73		/// - it was too long
74		InvalidSerialNumber,
75
76		/// The CRL signature is invalid for the issuer's public key.
77		InvalidCrlSignatureForPublicKey,
78
79		/// The signature is invalid for the given public key.
80		InvalidSignatureForPublicKey,
81
82		/// A CRL was signed by an issuer that has a KeyUsage bitstring that does not include
83		/// the cRLSign key usage bit.
84		IssuerNotCrlSigner,
85
86		/// A presented or reference DNS identifier was malformed, potentially
87		/// containing invalid characters or invalid labels.
88		MalformedDnsIdentifier,
89
90		/// The certificate extensions are malformed.
91		///
92		/// In particular, webpki requires the DNS name(s) be in the subjectAltName
93		/// extension as required by the CA/Browser Forum Baseline Requirements
94		/// and as recommended by RFC6125.
95		MalformedExtensions,
96
97		/// A name constraint was malformed, potentially containing invalid characters or
98		/// invalid labels.
99		MalformedNameConstraint,
100
101		/// The maximum number of name constraint comparisons has been reached.
102		MaximumNameConstraintComparisonsExceeded,
103
104		/// The maximum number of internal path building calls has been reached. Path complexity is too great.
105		MaximumPathBuildCallsExceeded,
106
107		/// The path search was terminated because it became too deep.
108		MaximumPathDepthExceeded,
109
110		/// The maximum number of signature checks has been reached. Path complexity is too great.
111		MaximumSignatureChecksExceeded,
112
113		/// The certificate violates one or more name constraints.
114		NameConstraintViolation,
115
116		/// The certificate violates one or more path length constraints.
117		PathLenConstraintViolated,
118
119		/// The certificate is not valid for the Extended Key Usage for which it is
120		/// being validated.
121		RequiredEkuNotFound,
122
123		/// The algorithm in the TBSCertificate "signature" field of a certificate
124		/// does not match the algorithm in the signature of the certificate.
125		SignatureAlgorithmMismatch,
126
127		/// Trailing data was found while parsing DER-encoded input for the named type.
128		TrailingData(DerTypeId),
129
130		/// A valid issuer for the certificate could not be found.
131		UnknownIssuer,
132
133		/// The certificate's revocation status could not be determined.
134		UnknownRevocationStatus,
135
136		/// The certificate is not a v3 X.509 certificate.
137		///
138		/// This error may be also reported if the certificate version field
139		/// is malformed.
140		UnsupportedCertVersion,
141
142		/// The certificate contains an unsupported critical extension.
143		UnsupportedCriticalExtension,
144
145		/// The CRL contains an issuing distribution point with no distribution point name,
146		/// or a distribution point name relative to an issuer.
147		UnsupportedCrlIssuingDistributionPoint,
148
149		/// The CRL is not a v2 X.509 CRL.
150		///
151		/// The RFC 5280 web PKI profile mandates only version 2 be used. See section
152		/// 5.1.2.1 for more information.
153		///
154		/// This error may also be reported if the CRL version field is malformed.
155		UnsupportedCrlVersion,
156
157		/// The CRL is an unsupported "delta" CRL.
158		UnsupportedDeltaCrl,
159
160		/// The CRL contains unsupported "indirect" entries.
161		UnsupportedIndirectCrl,
162
163		/// The `ServerName` contained an unsupported type of value.
164		UnsupportedNameType,
165
166		/// The revocation reason is not in the set of supported revocation reasons.
167		UnsupportedRevocationReason,
168
169		/// The CRL is partitioned by revocation reasons.
170		UnsupportedRevocationReasonsPartitioning,
171
172		/// The signature algorithm for a signature over a CRL is not in the set of supported
173		/// signature algorithms given.
174		UnsupportedCrlSignatureAlgorithm,
175
176		/// The signature algorithm for a signature is not in the set of supported
177		/// signature algorithms given.
178		UnsupportedSignatureAlgorithm,
179
180		/// The CRL signature's algorithm does not match the algorithm of the issuer
181		/// public key it is being validated for. This may be because the public key
182		/// algorithm's OID isn't recognized (e.g. DSA), or the public key
183		/// algorithm's parameters don't match the supported parameters for that
184		/// algorithm (e.g. ECC keys for unsupported curves), or the public key
185		/// algorithm and the signature algorithm simply don't match (e.g.
186		/// verifying an RSA signature with an ECC public key).
187		UnsupportedCrlSignatureAlgorithmForPublicKey,
188
189		/// The signature's algorithm does not match the algorithm of the public
190		/// key it is being validated for. This may be because the public key
191		/// algorithm's OID isn't recognized (e.g. DSA), or the public key
192		/// algorithm's parameters don't match the supported parameters for that
193		/// algorithm (e.g. ECC keys for unsupported curves), or the public key
194		/// algorithm and the signature algorithm simply don't match (e.g.
195		/// verifying an RSA signature with an ECC public key).
196		UnsupportedSignatureAlgorithmForPublicKey,
197		}
198
199		impl Error {
200		// Compare the Error with the new error by rank, returning the higher rank of the two as
201		// the most specific error.
202	0	pub(crate) fn most_specific(self, new: Self) -> Self {
203		// Assign an error a numeric value ranking it by specificity.
204	0	if self.rank() >= new.rank() {
205	0	self
206		} else {
207	0	new
208		}
209	0	}
210
211		// Return a numeric indication of how specific the error is, where an error with a higher rank
212		// is considered more useful to an end user than an error with a lower rank. This is used by
213		// Error::most_specific to compare two errors in order to return which is more specific.
214		#[allow(clippy::as_conversions)] // We won't exceed u32 errors.
215	0	pub(crate) fn rank(&self) -> u32 {
216	0	match &self {
217		// Errors related to certificate validity
218	0	Self::CertNotValidYet \| Self::CertExpired => 290,
219	0	Self::CertNotValidForName => 280,
220	0	Self::CertRevoked \| Self::UnknownRevocationStatus \| Self::CrlExpired => 270,
221	0	Self::InvalidCrlSignatureForPublicKey \| Self::InvalidSignatureForPublicKey => 260,
222	0	Self::SignatureAlgorithmMismatch => 250,
223	0	Self::RequiredEkuNotFound => 240,
224	0	Self::NameConstraintViolation => 230,
225	0	Self::PathLenConstraintViolated => 220,
226	0	Self::CaUsedAsEndEntity \| Self::EndEntityUsedAsCa => 210,
227	0	Self::IssuerNotCrlSigner => 200,
228
229		// Errors related to supported features used in an invalid way.
230	0	Self::InvalidCertValidity => 190,
231	0	Self::InvalidNetworkMaskConstraint => 180,
232	0	Self::InvalidSerialNumber => 170,
233	0	Self::InvalidCrlNumber => 160,
234
235		// Errors related to unsupported features.
236		Self::UnsupportedCrlSignatureAlgorithmForPublicKey
237	0	\| Self::UnsupportedSignatureAlgorithmForPublicKey => 150,
238	0	Self::UnsupportedCrlSignatureAlgorithm \| Self::UnsupportedSignatureAlgorithm => 140,
239	0	Self::UnsupportedCriticalExtension => 130,
240	0	Self::UnsupportedCertVersion => 130,
241	0	Self::UnsupportedCrlVersion => 120,
242	0	Self::UnsupportedDeltaCrl => 110,
243	0	Self::UnsupportedIndirectCrl => 100,
244	0	Self::UnsupportedNameType => 95,
245	0	Self::UnsupportedRevocationReason => 90,
246	0	Self::UnsupportedRevocationReasonsPartitioning => 80,
247	0	Self::UnsupportedCrlIssuingDistributionPoint => 70,
248	0	Self::MaximumPathDepthExceeded => 61,
249
250		// Errors related to malformed data.
251	0	Self::MalformedDnsIdentifier => 60,
252	0	Self::MalformedNameConstraint => 50,
253	0	Self::MalformedExtensions \| Self::TrailingData(_) => 40,
254	0	Self::ExtensionValueInvalid => 30,
255
256		// Generic DER errors.
257	0	Self::BadDerTime => 20,
258	0	Self::BadDer => 10,
259
260		// Special case errors - not subject to ranking.
261	0	Self::MaximumSignatureChecksExceeded => 0,
262	0	Self::MaximumPathBuildCallsExceeded => 0,
263	0	Self::MaximumNameConstraintComparisonsExceeded => 0,
264
265		// Default catch all error - should be renamed in the future.
266	0	Self::UnknownIssuer => 0,
267		}
268	0	}
269
270		/// Returns true for errors that should be considered fatal during path building. Errors of
271		/// this class should halt any further path building and be returned immediately.
272		#[inline]
273	0	pub(crate) fn is_fatal(&self) -> bool {
274	0	matches!(
275	0	self,
276		Self::MaximumSignatureChecksExceeded
277		\| Self::MaximumPathBuildCallsExceeded
278		\| Self::MaximumNameConstraintComparisonsExceeded
279		)
280	0	}
281		}
282
283		impl From<Error> for ControlFlow<Error, Error> {
284	0	fn from(value: Error) -> Self {
285	0	match value {
286		// If an error is fatal, we've exhausted the potential for continued search.
287	0	err if err.is_fatal() => Self::Break(err),
288		// Otherwise we've rejected one candidate chain, but may continue to search for others.
289	0	err => Self::Continue(err),
290		}
291	0	}
292		}
293
294		impl fmt::Display for Error {
295	0	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
296	0	write!(f, "{:?}", self)
297	0	}
298		}
299
300		#[cfg(feature = "std")]
301		impl ::std::error::Error for Error {}
302
303		/// Trailing data was found while parsing DER-encoded input for the named type.
304		#[allow(missing_docs)]
305		#[non_exhaustive]
306		#[derive(Clone, Copy, Debug, Eq, PartialEq)]
307		pub enum DerTypeId {
308		BitString,
309		Bool,
310		Certificate,
311		CertificateExtensions,
312		CertificateTbsCertificate,
313		CertRevocationList,
314		CertRevocationListExtension,
315		CrlDistributionPoint,
316		CommonNameInner,
317		CommonNameOuter,
318		DistributionPointName,
319		Extension,
320		GeneralName,
321		RevocationReason,
322		Signature,
323		SignatureAlgorithm,
324		SignedData,
325		SubjectPublicKeyInfo,
326		Time,
327		TrustAnchorV1,
328		TrustAnchorV1TbsCertificate,
329		U8,
330		RevokedCertificate,
331		RevokedCertificateExtension,
332		RevokedCertEntry,
333		IssuingDistributionPoint,
334		}