From 41946fff6ec9e12841e56f25e04f42855212fda8 Mon Sep 17 00:00:00 2001
From: 0kPN1 <55192256+0kPN1@users.noreply.github.com>
Date: Fri, 11 Jul 2025 15:33:24 +0900
Subject: [PATCH] fix(x509-tsp): add proper no-std support
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fix(x509-tsp): add proper no-std support

- Add default-features = false to all dependencies
- Create proper feature flag structure with std and alloc features
- Make std opt-in rather than mandatory
- Remove incorrect alloc features from cms and x509-cert

This allows the crate to be used in no-std environments like embedded
systems and WASM, following the RustCrypto ecosystem's no-std first
philosophy.

Fixes the issue where even with default-features = false, std features
were forced on dependencies.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
---
 x509-tsp/Cargo.toml | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/x509-tsp/Cargo.toml b/x509-tsp/Cargo.toml
index a553620c7..e68de2593 100644
--- a/x509-tsp/Cargo.toml
+++ b/x509-tsp/Cargo.toml
@@ -15,10 +15,25 @@ readme = "README.md"
 rust-version = "1.85"
 
 [dependencies]
-der = { version = "0.8.0-rc.7", features = ["alloc", "derive", "oid", "pem"] }
-cms = { version = "=0.3.0-pre.0" }
-cmpv2 = { version = "=0.3.0-pre.0", features = ["alloc"] }
+der = { version = "0.8.0-rc.7", default-features = false, features = ["derive", "oid"] }
+cms = { version = "=0.3.0-pre.0", default-features = false }
+cmpv2 = { version = "=0.3.0-pre.0", default-features = false }
 x509-cert = { version = "0.3.0-rc.0", default-features = false }
 
+[features]
+default = ["std"]
+std = [
+    "der/std",
+    "cms/std", 
+    "cmpv2/std",
+    "x509-cert/std",
+    "alloc"
+]
+alloc = [
+    "der/alloc",
+    "cmpv2/alloc"
+]
+pem = ["der/pem"]
+
 [dev-dependencies]
 hex-literal = "1"