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Merge pull request #18 from alexrudy/spki
SPKI and DER support for SignatureBytes
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| use std::fmt; | ||
|
|
||
| use base64ct::Encoding; | ||
| use bytes::Bytes; | ||
|
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| pub use signature::*; | ||
|
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||
| /// A signature which has not been matched to an algorithm or key. | ||
| /// | ||
| /// This is a basic signature `struct` which can be used to store any signature | ||
| /// on the heap. It is used to store the signature of a JWT before it is verified, | ||
| /// or if a signature has a variable length. | ||
| #[derive(Clone, PartialEq, Eq, Hash)] | ||
| pub struct SignatureBytes(Bytes); | ||
|
|
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| impl SignatureBytes { | ||
| /// Create a new signature from a base64url-encoded string. | ||
| pub fn from_b64url(data: &str) -> std::result::Result<Self, base64ct::Error> { | ||
| Ok(Self(Bytes::from(base64ct::Base64UrlUnpadded::decode_vec( | ||
| data, | ||
| )?))) | ||
| } | ||
| } | ||
|
|
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| impl fmt::Debug for SignatureBytes { | ||
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { | ||
| f.debug_tuple("SignatureBytes") | ||
| .field(&base64ct::Base64UrlUnpadded::encode_string(self.0.as_ref())) | ||
| .finish() | ||
| } | ||
| } | ||
|
|
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| impl AsRef<[u8]> for SignatureBytes { | ||
| fn as_ref(&self) -> &[u8] { | ||
| &self.0 | ||
| } | ||
| } | ||
|
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| impl From<&[u8]> for SignatureBytes { | ||
| fn from(bytes: &[u8]) -> Self { | ||
| SignatureBytes(bytes.to_owned().into()) | ||
| } | ||
| } | ||
|
|
||
| impl From<Bytes> for SignatureBytes { | ||
| fn from(bytes: Bytes) -> Self { | ||
| SignatureBytes(bytes) | ||
| } | ||
| } | ||
|
|
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| impl From<SignatureBytes> for Bytes { | ||
| fn from(bytes: SignatureBytes) -> Self { | ||
| bytes.0.clone() | ||
| } | ||
| } | ||
|
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| impl From<Vec<u8>> for SignatureBytes { | ||
| fn from(bytes: Vec<u8>) -> Self { | ||
| SignatureBytes(bytes.into()) | ||
| } | ||
| } | ||
|
|
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| impl signature::SignatureEncoding for SignatureBytes { | ||
| type Repr = Bytes; | ||
| } | ||
|
|
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| #[cfg(feature = "spki")] | ||
| impl spki::SignatureBitStringEncoding for SignatureBytes { | ||
| fn to_bitstring(&self) -> spki::der::Result<spki::der::asn1::BitString> { | ||
| spki::der::asn1::BitString::from_bytes(self.0.as_ref()) | ||
| } | ||
| } | ||
|
|
||
| #[cfg(feature = "der")] | ||
| impl<'c> der::Decode<'c> for SignatureBytes { | ||
| fn decode<R: der::Reader<'c>>(reader: &mut R) -> der::Result<Self> { | ||
| use der::Encode; | ||
|
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| let header = reader.peek_header()?; | ||
| header.tag.assert_eq(der::Tag::Sequence)?; | ||
|
|
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| let len = (header.encoded_len()? + header.length)?; | ||
| let mut buf = Vec::with_capacity(usize::try_from(len)?); | ||
| let slice = buf | ||
| .get_mut(..usize::try_from(len)?) | ||
| .ok_or_else(|| reader.error(der::Tag::Sequence.length_error().kind()))?; | ||
|
|
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| reader.read_into(slice)?; | ||
| Ok(Self::from(buf)) | ||
| } | ||
| } | ||
|
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| #[cfg(feature = "der")] | ||
| impl der::Tagged for SignatureBytes { | ||
| fn tag(&self) -> der::Tag { | ||
| der::Tag::Sequence | ||
| } | ||
| } | ||
|
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| #[cfg(feature = "der")] | ||
| impl der::Encode for SignatureBytes { | ||
| fn encoded_len(&self) -> der::Result<der::Length> { | ||
| der::Length::try_from(self.0.len()) | ||
| } | ||
|
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| fn encode(&self, writer: &mut impl der::Writer) -> der::Result<()> { | ||
| writer.write(self.0.as_ref()) | ||
| } | ||
| } |