From 86200316524418b74980b8908e46d0baee6479e3 Mon Sep 17 00:00:00 2001
From: turbocooler <turbocooler@cocaine.ninja>
Date: Wed, 14 Feb 2024 23:28:44 +0300
Subject: [PATCH] Add support for custom error types in `der`.

Goes in pair with [this](https://github.com/RustCrypto/formats/pull/1055) PR to `formats`.
---
 Cargo.lock            | 22 ++++++++++++++--------
 Cargo.toml            |  7 +++++++
 dsa/src/components.rs |  2 ++
 dsa/src/lib.rs        |  2 ++
 ecdsa/src/der.rs      |  4 +++-
 5 files changed, 28 insertions(+), 9 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 3a406e08..2780b794 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -109,8 +109,7 @@ dependencies = [
 [[package]]
 name = "der"
 version = "0.8.0-pre.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b489fd2221710c1dd46637d66b984161fb66134f81437a8489800306bcc2ecea"
+source = "git+https://github.com/RustCrypto/formats.git?branch=master#270dbcb01ff75791d6527ff7759d335a39585420"
 dependencies = [
  "const-oid 0.10.0-pre.2",
  "pem-rfc7468 1.0.0-pre.0",
@@ -352,6 +351,15 @@ dependencies = [
  "base64ct",
 ]
 
+[[package]]
+name = "pkcs5"
+version = "0.8.0-pre.0"
+source = "git+https://github.com/RustCrypto/formats.git?branch=master#270dbcb01ff75791d6527ff7759d335a39585420"
+dependencies = [
+ "der 0.8.0-pre.0",
+ "spki 0.8.0-pre.0",
+]
+
 [[package]]
 name = "pkcs8"
 version = "0.10.2"
@@ -365,10 +373,10 @@ dependencies = [
 [[package]]
 name = "pkcs8"
 version = "0.11.0-pre.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "935c09e0aecb0cb8f8907b57438b19a068cb74a25189b06724f061170b2465ff"
+source = "git+https://github.com/RustCrypto/formats.git?branch=master#270dbcb01ff75791d6527ff7759d335a39585420"
 dependencies = [
  "der 0.8.0-pre.0",
+ "pkcs5",
  "spki 0.8.0-pre.0",
 ]
 
@@ -439,8 +447,7 @@ dependencies = [
 [[package]]
 name = "sec1"
 version = "0.8.0-pre.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02dc081ed777a3bab68583b52ffb8221677b6e90d483b320963a247e2c07f328"
+source = "git+https://github.com/RustCrypto/formats.git?branch=master#270dbcb01ff75791d6527ff7759d335a39585420"
 dependencies = [
  "base16ct",
  "der 0.8.0-pre.0",
@@ -557,8 +564,7 @@ dependencies = [
 [[package]]
 name = "spki"
 version = "0.8.0-pre.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cb2b56670f5ef52934c97efad30bf42585de0c33ec3e2a886e38b80d2db67243"
+source = "git+https://github.com/RustCrypto/formats.git?branch=master#270dbcb01ff75791d6527ff7759d335a39585420"
 dependencies = [
  "base64ct",
  "der 0.8.0-pre.0",
diff --git a/Cargo.toml b/Cargo.toml
index 267ffaee..763ddd65 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,3 +10,10 @@ members = [
 
 [profile.dev]
 opt-level = 2
+
+[patch.crates-io]
+der = { git = 'https://github.com/RustCrypto/formats.git', branch = 'master' }
+spki = { git = 'https://github.com/RustCrypto/formats.git', branch = 'master' }
+pkcs8 = { git = 'https://github.com/RustCrypto/formats.git', branch = 'master' }
+pkcs5 = { git = 'https://github.com/RustCrypto/formats.git', branch = 'master' }
+sec1 = { git = 'https://github.com/RustCrypto/formats.git', branch = 'master' }
diff --git a/dsa/src/components.rs b/dsa/src/components.rs
index b2450e2f..dbc708e9 100644
--- a/dsa/src/components.rs
+++ b/dsa/src/components.rs
@@ -63,6 +63,8 @@ impl Components {
 }
 
 impl<'a> DecodeValue<'a> for Components {
+    type Error = der::Error;
+
     fn decode_value<R: Reader<'a>>(reader: &mut R, _header: Header) -> der::Result<Self> {
         let p = reader.decode::<UintRef<'_>>()?;
         let q = reader.decode::<UintRef<'_>>()?;
diff --git a/dsa/src/lib.rs b/dsa/src/lib.rs
index 3a0fa78b..89805fd3 100644
--- a/dsa/src/lib.rs
+++ b/dsa/src/lib.rs
@@ -110,6 +110,8 @@ impl Signature {
 }
 
 impl<'a> DecodeValue<'a> for Signature {
+    type Error = der::Error;
+
     fn decode_value<R: Reader<'a>>(reader: &mut R, header: Header) -> der::Result<Self> {
         reader.read_nested(header.length, |reader| {
             let r = UintRef::decode(reader)?;
diff --git a/ecdsa/src/der.rs b/ecdsa/src/der.rs
index 085accc4..fea97642 100644
--- a/ecdsa/src/der.rs
+++ b/ecdsa/src/der.rs
@@ -203,6 +203,8 @@ where
     MaxSize<C>: ArraySize,
     <FieldBytesSize<C> as Add>::Output: Add<MaxOverhead> + ArraySize,
 {
+    type Error = der::Error;
+
     fn decode<R: Reader<'a>>(reader: &mut R) -> der::Result<Self> {
         let header = reader.peek_header()?;
         header.tag.assert_eq(Tag::Sequence)?;
@@ -360,7 +362,7 @@ fn decode_der(der_bytes: &[u8]) -> der::Result<(UintRef<'_>, UintRef<'_>)> {
     let header = der::Header::decode(&mut reader)?;
     header.tag.assert_eq(der::Tag::Sequence)?;
 
-    let ret = reader.read_nested(header.length, |reader| {
+    let ret = reader.read_nested::<_, _, der::Error>(header.length, |reader| {
         let r = UintRef::decode(reader)?;
         let s = UintRef::decode(reader)?;
         Ok((r, s))