From ae495dc27d9a20ab943c06085c8bb9c47ee90b5c Mon Sep 17 00:00:00 2001
From: Alex Gaynor <alex.gaynor@gmail.com>
Date: Wed, 5 Feb 2025 14:35:15 -0800
Subject: [PATCH] Expose rc2 ciphers on symm::Cipher

They're terrible, but they're still used in PKCS#8 and PKCS#12
---
 openssl-sys/build/expando.c        |  4 ++++
 openssl-sys/build/main.rs          |  2 +-
 openssl-sys/src/handwritten/evp.rs |  5 +++++
 openssl/build.rs                   |  2 +-
 openssl/src/symm.rs                | 10 ++++++++++
 5 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/openssl-sys/build/expando.c b/openssl-sys/build/expando.c
index e171621dca..88f5f63d29 100644
--- a/openssl-sys/build/expando.c
+++ b/openssl-sys/build/expando.c
@@ -87,6 +87,10 @@ RUST_CONF_OPENSSL_NO_PSK
 RUST_CONF_OPENSSL_NO_RC4
 #endif
 
+#ifdef OPENSSL_NO_RC2
+RUST_CONF_OPENSSL_NO_RC2
+#endif
+
 #ifdef OPENSSL_NO_RFC3779
 RUST_CONF_OPENSSL_NO_RFC3779
 #endif
diff --git a/openssl-sys/build/main.rs b/openssl-sys/build/main.rs
index e6a3db397e..1a59d6f396 100644
--- a/openssl-sys/build/main.rs
+++ b/openssl-sys/build/main.rs
@@ -74,7 +74,7 @@ fn check_ssl_kind() {
 }
 
 fn main() {
-    println!("cargo:rustc-check-cfg=cfg(osslconf, values(\"OPENSSL_NO_OCB\", \"OPENSSL_NO_SM4\", \"OPENSSL_NO_SEED\", \"OPENSSL_NO_CHACHA\", \"OPENSSL_NO_CAST\", \"OPENSSL_NO_IDEA\", \"OPENSSL_NO_CAMELLIA\", \"OPENSSL_NO_RC4\", \"OPENSSL_NO_BF\", \"OPENSSL_NO_PSK\", \"OPENSSL_NO_DEPRECATED_3_0\", \"OPENSSL_NO_SCRYPT\", \"OPENSSL_NO_SM3\", \"OPENSSL_NO_RMD160\", \"OPENSSL_NO_EC2M\", \"OPENSSL_NO_OCSP\", \"OPENSSL_NO_CMS\", \"OPENSSL_NO_COMP\", \"OPENSSL_NO_SOCK\", \"OPENSSL_NO_STDIO\", \"OPENSSL_NO_EC\", \"OPENSSL_NO_SSL3_METHOD\", \"OPENSSL_NO_KRB5\", \"OPENSSL_NO_TLSEXT\", \"OPENSSL_NO_SRP\", \"OPENSSL_NO_RFC3779\", \"OPENSSL_NO_SHA\", \"OPENSSL_NO_NEXTPROTONEG\", \"OPENSSL_NO_ENGINE\", \"OPENSSL_NO_BUF_FREELISTS\"))");
+    println!("cargo:rustc-check-cfg=cfg(osslconf, values(\"OPENSSL_NO_OCB\", \"OPENSSL_NO_SM4\", \"OPENSSL_NO_SEED\", \"OPENSSL_NO_CHACHA\", \"OPENSSL_NO_CAST\", \"OPENSSL_NO_IDEA\", \"OPENSSL_NO_CAMELLIA\", \"OPENSSL_NO_RC4\", \"OPENSSL_NO_BF\", \"OPENSSL_NO_PSK\", \"OPENSSL_NO_DEPRECATED_3_0\", \"OPENSSL_NO_SCRYPT\", \"OPENSSL_NO_SM3\", \"OPENSSL_NO_RMD160\", \"OPENSSL_NO_EC2M\", \"OPENSSL_NO_OCSP\", \"OPENSSL_NO_CMS\", \"OPENSSL_NO_COMP\", \"OPENSSL_NO_SOCK\", \"OPENSSL_NO_STDIO\", \"OPENSSL_NO_EC\", \"OPENSSL_NO_SSL3_METHOD\", \"OPENSSL_NO_KRB5\", \"OPENSSL_NO_TLSEXT\", \"OPENSSL_NO_SRP\", \"OPENSSL_NO_RFC3779\", \"OPENSSL_NO_SHA\", \"OPENSSL_NO_NEXTPROTONEG\", \"OPENSSL_NO_ENGINE\", \"OPENSSL_NO_BUF_FREELISTS\", \"OPENSSL_NO_RC2\"))");
 
     println!("cargo:rustc-check-cfg=cfg(openssl)");
     println!("cargo:rustc-check-cfg=cfg(libressl)");
diff --git a/openssl-sys/src/handwritten/evp.rs b/openssl-sys/src/handwritten/evp.rs
index aa83c92122..a1be1da682 100644
--- a/openssl-sys/src/handwritten/evp.rs
+++ b/openssl-sys/src/handwritten/evp.rs
@@ -440,6 +440,11 @@ extern "C" {
     #[cfg(not(osslconf = "OPENSSL_NO_IDEA"))]
     pub fn EVP_idea_ofb() -> *const EVP_CIPHER;
 
+    #[cfg(not(osslconf = "OPENSSL_NO_RC2"))]
+    pub fn EVP_rc2_cbc() -> *const EVP_CIPHER;
+    #[cfg(not(osslconf = "OPENSSL_NO_RC2"))]
+    pub fn EVP_rc2_40_cbc() -> *const EVP_CIPHER;
+
     #[cfg(not(ossl110))]
     pub fn OPENSSL_add_all_algorithms_noconf();
 
diff --git a/openssl/build.rs b/openssl/build.rs
index 33372efd51..52f3e89fee 100644
--- a/openssl/build.rs
+++ b/openssl/build.rs
@@ -7,7 +7,7 @@
 use std::env;
 
 fn main() {
-    println!("cargo:rustc-check-cfg=cfg(osslconf, values(\"OPENSSL_NO_OCB\", \"OPENSSL_NO_SM4\", \"OPENSSL_NO_SEED\", \"OPENSSL_NO_CHACHA\", \"OPENSSL_NO_CAST\", \"OPENSSL_NO_IDEA\", \"OPENSSL_NO_CAMELLIA\", \"OPENSSL_NO_RC4\", \"OPENSSL_NO_BF\", \"OPENSSL_NO_PSK\", \"OPENSSL_NO_DEPRECATED_3_0\", \"OPENSSL_NO_SCRYPT\", \"OPENSSL_NO_SM3\", \"OPENSSL_NO_RMD160\", \"OPENSSL_NO_EC2M\", \"OPENSSL_NO_OCSP\", \"OPENSSL_NO_CMS\", \"OPENSSL_NO_EC\", \"OPENSSL_NO_ARGON2\"))");
+    println!("cargo:rustc-check-cfg=cfg(osslconf, values(\"OPENSSL_NO_OCB\", \"OPENSSL_NO_SM4\", \"OPENSSL_NO_SEED\", \"OPENSSL_NO_CHACHA\", \"OPENSSL_NO_CAST\", \"OPENSSL_NO_IDEA\", \"OPENSSL_NO_CAMELLIA\", \"OPENSSL_NO_RC4\", \"OPENSSL_NO_BF\", \"OPENSSL_NO_PSK\", \"OPENSSL_NO_DEPRECATED_3_0\", \"OPENSSL_NO_SCRYPT\", \"OPENSSL_NO_SM3\", \"OPENSSL_NO_RMD160\", \"OPENSSL_NO_EC2M\", \"OPENSSL_NO_OCSP\", \"OPENSSL_NO_CMS\", \"OPENSSL_NO_EC\", \"OPENSSL_NO_ARGON2\", \"OPENSSL_NO_RC2\"))");
 
     println!("cargo:rustc-check-cfg=cfg(libressl)");
     println!("cargo:rustc-check-cfg=cfg(boringssl)");
diff --git a/openssl/src/symm.rs b/openssl/src/symm.rs
index 3929c59404..f446eea47e 100644
--- a/openssl/src/symm.rs
+++ b/openssl/src/symm.rs
@@ -454,6 +454,16 @@ impl Cipher {
         unsafe { Cipher(ffi::EVP_sm4_ofb()) }
     }
 
+    #[cfg(not(osslconf = "OPENSSL_NO_RC2"))]
+    pub fn rc2_cbc() -> Cipher {
+        unsafe { Cipher(ffi::EVP_rc2_cbc()) }
+    }
+
+    #[cfg(not(osslconf = "OPENSSL_NO_RC2"))]
+    pub fn rc2_40_cbc() -> Cipher {
+        unsafe { Cipher(ffi::EVP_rc2_40_cbc()) }
+    }
+
     /// Creates a `Cipher` from a raw pointer to its OpenSSL type.
     ///
     /// # Safety