Add _init() and _free() for hash modules

include/polarssl/md2.h

@@ -60,6 +60,20 @@ typedef struct
 }
 md2_context;
 
+/**
+ * \brief          Initialize MD2 context
+ *
+ * \param ctx      MD2 context to be initialized
+ */
+void md2_init( md2_context *ctx );
+
+/**
+ * \brief          Clear MD2 context
+ *
+ * \param ctx      MD2 context to be cleared
+ */
+void md2_free( md2_context *ctx );
+
 /**
  * \brief          MD2 context setup
  *

include/polarssl/md4.h

@@ -66,6 +66,20 @@ typedef struct
 }
 md4_context;
 
+/**
+ * \brief          Initialize MD4 context
+ *
+ * \param ctx      MD4 context to be initialized
+ */
+void md4_init( md4_context *ctx );
+
+/**
+ * \brief          Clear MD4 context
+ *
+ * \param ctx      MD4 context to be cleared
+ */
+void md4_free( md4_context *ctx );
+
 /**
  * \brief          MD4 context setup
  *

include/polarssl/md5.h

@@ -66,6 +66,20 @@ typedef struct
 }
 md5_context;
 
+/**
+ * \brief          Initialize MD5 context
+ *
+ * \param ctx      MD5 context to be initialized
+ */
+void md5_init( md5_context *ctx );
+
+/**
+ * \brief          Clear MD5 context
+ *
+ * \param ctx      MD5 context to be cleared
+ */
+void md5_free( md5_context *ctx );
+
 /**
  * \brief          MD5 context setup
  *

include/polarssl/ripemd160.h

@@ -66,6 +66,20 @@ typedef struct
 }
 ripemd160_context;
 
+/**
+ * \brief          Initialize RIPEMD-160 context
+ *
+ * \param ctx      RIPEMD-160 context to be initialized
+ */
+void ripemd160_init( ripemd160_context *ctx );
+
+/**
+ * \brief          Clear RIPEMD-160 context
+ *
+ * \param ctx      RIPEMD-160 context to be cleared
+ */
+void ripemd160_free( ripemd160_context *ctx );
+
 /**
  * \brief          RIPEMD-160 context setup
  *

include/polarssl/sha1.h

@@ -66,6 +66,20 @@ typedef struct
 }
 sha1_context;
 
+/**
+ * \brief          Initialize SHA-1 context
+ *
+ * \param ctx      SHA-1 context to be initialized
+ */
+void sha1_init( sha1_context *ctx );
+
+/**
+ * \brief          Clear SHA-1 context
+ *
+ * \param ctx      SHA-1 context to be cleared
+ */
+void sha1_free( sha1_context *ctx );
+
 /**
  * \brief          SHA-1 context setup
  *

include/polarssl/sha256.h

@@ -67,6 +67,20 @@ typedef struct
 }
 sha256_context;
 
+/**
+ * \brief          Initialize SHA-256 context
+ *
+ * \param ctx      SHA-256 context to be initialized
+ */
+void sha256_init( sha256_context *ctx );
+
+/**
+ * \brief          Clear SHA-256 context
+ *
+ * \param ctx      SHA-256 context to be cleared
+ */
+void sha256_free( sha256_context *ctx );
+
 /**
  * \brief          SHA-256 context setup
  *

include/polarssl/sha512.h

@@ -68,6 +68,20 @@ typedef struct
 }
 sha512_context;
 
+/**
+ * \brief          Initialize SHA-512 context
+ *
+ * \param ctx      SHA-512 context to be initialized
+ */
+void sha512_init( sha512_context *ctx );
+
+/**
+ * \brief          Clear SHA-512 context
+ *
+ * \param ctx      SHA-512 context to be cleared
+ */
+void sha512_free( sha512_context *ctx );
+
 /**
  * \brief          SHA-512 context setup
  *