1 files changed, 68 insertions, 0 deletions
diff --git a/vendor/spki/src/error.rs b/vendor/spki/src/error.rs
new file mode 100644
index 0000000..9d05990
--- /dev/null
+++ b/vendor/spki/src/error.rs
@@ -0,0 +1,68 @@
+//! Error types
+
+use core::fmt;
+use der::asn1::ObjectIdentifier;
+
+/// Result type with `spki` crate's [`Error`] type.
+pub type Result<T> = core::result::Result<T, Error>;
+
+#[cfg(feature = "pem")]
+use der::pem;
+
+/// Error type
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+#[non_exhaustive]
+pub enum Error {
+    /// Algorithm parameters are missing.
+    AlgorithmParametersMissing,
+
+    /// ASN.1 DER-related errors.
+    Asn1(der::Error),
+
+    /// Malformed cryptographic key contained in a SPKI document.
+    ///
+    /// This is intended for relaying errors related to the raw data contained
+    /// in [`SubjectPublicKeyInfo::subject_public_key`][`crate::SubjectPublicKeyInfo::subject_public_key`].
+    KeyMalformed,
+
+    /// Unknown algorithm OID.
+    OidUnknown {
+        /// Unrecognized OID value found in e.g. a SPKI `AlgorithmIdentifier`.
+        oid: ObjectIdentifier,
+    },
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Error::AlgorithmParametersMissing => {
+                f.write_str("AlgorithmIdentifier parameters missing")
+            }
+            Error::Asn1(err) => write!(f, "ASN.1 error: {}", err),
+            Error::KeyMalformed => f.write_str("SPKI cryptographic key data malformed"),
+            Error::OidUnknown { oid } => {
+                write!(f, "unknown/unsupported algorithm OID: {}", oid)
+            }
+        }
+    }
+}
+
+impl From<der::Error> for Error {
+    fn from(err: der::Error) -> Error {
+        if let der::ErrorKind::OidUnknown { oid } = err.kind() {
+            Error::OidUnknown { oid }
+        } else {
+            Error::Asn1(err)
+        }
+    }
+}
+
+#[cfg(feature = "pem")]
+impl From<pem::Error> for Error {
+    fn from(err: pem::Error) -> Error {
+        der::Error::from(err).into()
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {}