ecdsa: adopt der API changes (#1025)

Make ecdsa crate compatible with changes to `Header` struct in the
`der` crate.

Co-authored-by: Daniel James <[email protected]>

Author: baloo

Cargo.lock

@@ -16,7 +16,7 @@ keywords = ["crypto", "nist", "signature"]
 rust-version = "1.85"
 
 [dependencies]
-der = { version = "0.8.0-rc.7", features = ["alloc"] }
+der = { version = "0.8.0-rc.8", features = ["alloc"] }
 digest = "0.11.0-rc.0"
 crypto-bigint = { version = "0.7.0-rc.0", default-features = false, features = ["alloc", "zeroize"] }
 crypto-primes = { version = "=0.7.0-pre.1", default-features = false }
@@ -36,7 +36,7 @@ proptest = "1"
 rand = "0.9"
 rand_chacha = "0.9"
 sha1 = "0.11.0-rc.0"
-der = { version = "0.8.0-rc.6", features = ["derive"] }
+der = { version = "0.8.0-rc.8", features = ["derive"] }
 
 [features]
 default = ["pkcs8"]

dsa/Cargo.toml

@@ -22,7 +22,7 @@ signature = { version = "3.0.0-rc.2", default-features = false, features = ["ran
 zeroize = { version = "1.5", default-features = false }
 
 # optional dependencies
-der = { version = "0.8.0-rc.7", optional = true }
+der = { version = "0.8.0-rc.8", optional = true }
 digest = { version = "0.11.0-rc.0", optional = true, default-features = false, features = ["oid"] }
 rfc6979 = { version = "0.5.0-rc.0", optional = true }
 serdect = { version = "0.3", optional = true, default-features = false, features = ["alloc"] }

ecdsa/Cargo.toml

@@ -204,10 +204,10 @@ where
 
     fn decode<R: Reader<'a>>(reader: &mut R) -> der::Result<Self> {
         let header = Header::peek(reader)?;
-        header.tag.assert_eq(Tag::Sequence)?;
+        header.tag().assert_eq(Tag::Sequence)?;
 
         let mut buf = SignatureBytes::<C>::default();
-        let len = (header.encoded_len()? + header.length)?;
+        let len = (header.encoded_len()? + header.length())?;
         let slice = buf
             .get_mut(..usize::try_from(len)?)
             .ok_or_else(|| reader.error(Tag::Sequence.length_error()))?;