patch.diff

diff --git a/Makefile b/Makefile
index a30364c..925a568 100644
--- a/Makefile
+++ b/Makefile
@@ -17,7 +17,7 @@ SRC_DIR  = ./src
 UTIL_DIR = ./utils
 
 
-CFLAGS   := -O3 $(CFLAGS) -std=c11 -Wall -Wextra -Wpedantic -Werror -fno-omit-frame-pointer #-pg -g -fsanitize=address
+CFLAGS   := -O3 $(CFLAGS) -std=c11 -Wall -Wextra -Wpedantic -Werror -fno-omit-frame-pointer -fPIC #-pg -g -fsanitize=address
 CXXFLAGS := -O3 $(CPPFLAGS) -Wall -Wextra -fno-exceptions -fno-rtti -nostdinc++
 INCPATH  := -I/usr/local/include -I/opt/local/include -I/usr/include -I$(SRC_DIR) -I$(UTIL_DIR)
 LDFLAGS  := $(LDFLAGS) #-fsanitize=address
@@ -189,6 +189,10 @@ endif
 all: $(EXE)
 
 
+libpqov.so: $(OBJ)
+	$(CC) -shared $(CFLAGS) $(INCPATH) -o $@ $^ $(LIBS)
+
+
 neon-matxvec-test: $(OBJ) neon-matxvec-test.o
 	$(LD) $(LDFLAGS) $(LIBPATH) -o $@ $^ $(LIBS)
 
diff --git a/src/ov.c b/src/ov.c
index b62f3ca..0fd7e7f 100644
--- a/src/ov.c
+++ b/src/ov.c
@@ -52,8 +52,8 @@ int ov_sign( uint8_t * signature , const sk_t * sk , const uint8_t * message , u
     // The computation:  H(M||salt)  -->   y  --C-map-->   x   --T-->   w
     hash_init  (&h_m_salt_secret);
     hash_update(&h_m_salt_secret, message, mlen);
-    hash_update(&h_m_salt_secret, salt, _SALT_BYTE);
     hash_ctx_copy(&h_vinegar_copy, &h_m_salt_secret);
+    hash_update(&h_m_salt_secret, salt, _SALT_BYTE);
     hash_final_digest( y , _PUB_M_BYTE , &h_m_salt_secret);  // H(M||salt)
 
     hash_update(&h_vinegar_copy, sk->sk_seed, LEN_SKSEED );   // H(M||salt||sk_seed ...