From b85d2641b20159f25a4416d7c1322ec98c04eb0c Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@anytun.org>
Date: Tue, 25 Sep 2012 11:55:47 +0000
Subject: added clang support

---
 src/cipher.c         |  6 ++----
 src/configure        | 20 ++++++++++++++++----
 src/key_derivation.c |  7 +++----
 3 files changed, 21 insertions(+), 12 deletions(-)

(limited to 'src')

diff --git a/src/cipher.c b/src/cipher.c
index 8913f64..427ce9a 100644
--- a/src/cipher.c
+++ b/src/cipher.c
@@ -210,8 +210,6 @@ int cipher_aesctr_init(cipher_t* c)
   if(!c->params_)
     return -2;
 
-  cipher_aesctr_param_t* params = c->params_;
-
 #ifndef USE_SSL_CRYPTO
   int algo;
   switch(c->key_length_) {
@@ -224,6 +222,7 @@ int cipher_aesctr_init(cipher_t* c)
   }
   }
 
+  cipher_aesctr_param_t* params = c->params_;
   gcry_error_t err = gcry_cipher_open(&params->handle_, algo, GCRY_CIPHER_MODE_CTR, 0);
   if(err) {
     log_printf(ERROR, "failed to open cipher: %s", gcry_strerror(err));
@@ -240,9 +239,8 @@ void cipher_aesctr_close(cipher_t* c)
     return;
 
   if(c->params_) {
-    cipher_aesctr_param_t* params = c->params_;
-
 #ifndef USE_SSL_CRYPTO
+    cipher_aesctr_param_t* params = c->params_;
     if(params->handle_)
       gcry_cipher_close(params->handle_);
 #endif
diff --git a/src/configure b/src/configure
index d91b396..d2f60a8 100755
--- a/src/configure
+++ b/src/configure
@@ -35,11 +35,9 @@
 #
 
 TARGET=`uname -s`
-
 EBUILD_COMPAT=0
 
-CFLAGS='-g -Wall -O2'
-LDFLAGS='-g -Wall -O2'
+USE_CLANG=0
 
 CRYPTO_LIB='gcrypt'
 PASSPHRASE=1
@@ -66,6 +64,7 @@ print_usage() {
   echo "          --no-crypto               disable crypto at all (only NULL cipher)"
   echo "          --disable-passphrase      disable master key and salt passphrase"
   echo "          --enable-passphrase       enable master key and salt passphrase"
+  echo "          --use-clang               use clang/llvm as compiler/linker"
 }
 
 for arg
@@ -74,6 +73,9 @@ do
   --target=*)
     TARGET=${arg#--target=}
   ;;
+  --use-clang)
+    USE_CLANG=1
+  ;;
   --prefix=*)
     PREFIX=${arg#--prefix=}
   ;;
@@ -129,6 +131,16 @@ if [ -n "$ERRORS" ] && [ $EBUILD_COMPAT -ne 1 ]; then
   exit 1
 fi
 
+if [ $USE_CLANG -eq 0 ]; then
+  CFLAGS='-g -Wall -O2'
+  LDFLAGS='-g -Wall -O2'
+  COMPILER='gcc'
+else
+  CFLAGS='-g -O2'
+  LDFLAGS='-g -O2'
+  COMPILER='clang'
+fi
+
 rm -f version.h
 rm -f include.mk
 case $TARGET in
@@ -194,7 +206,7 @@ cat > include.mk <<EOF
 # use ./configure instead
 
 TARGET := $TARGET
-CC := gcc
+CC := $COMPILER
 CFLAGS := $CFLAGS
 LDFLAGS := $LDFLAGS
 STRIP := strip
diff --git a/src/key_derivation.c b/src/key_derivation.c
index a01695b..8e6e95a 100644
--- a/src/key_derivation.c
+++ b/src/key_derivation.c
@@ -158,7 +158,7 @@ int key_derivation_generate_master_key(key_derivation_t* kd, const char* passphr
 #ifndef USE_SSL_CRYPTO
   gcry_md_hash_buffer(GCRY_MD_SHA256, digest.buf_, passphrase, strlen(passphrase));
 #else
-  SHA256(passphrase, strlen(passphrase), digest.buf_);
+  SHA256((const u_int8_t*)passphrase, strlen(passphrase), digest.buf_);
 #endif
 
   kd->master_key_.length_ = key_length/8;
@@ -213,7 +213,7 @@ int key_derivation_generate_master_salt(key_derivation_t* kd, const char* passph
 #ifndef USE_SSL_CRYPTO
   gcry_md_hash_buffer(GCRY_MD_SHA1, digest.buf_, passphrase, strlen(passphrase));
 #else
-  SHA1(passphrase, strlen(passphrase), digest.buf_);
+  SHA1((const u_int8_t*)passphrase, strlen(passphrase), digest.buf_);
 #endif
 
   kd->master_salt_.length_ = salt_length/8;
@@ -385,9 +385,8 @@ void key_derivation_aesctr_close(key_derivation_t* kd)
     return;
 
   if(kd->params_) {
-    key_derivation_aesctr_param_t* params = kd->params_;
-
 #ifndef USE_SSL_CRYPTO
+    key_derivation_aesctr_param_t* params = kd->params_;
     if(params->handle_)
       gcry_cipher_close(params->handle_);
 #endif
-- 
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