- Added reset functionality for HMAC context. Speed-up for some use-cases.

include/polarssl/md2.h

@@ -112,6 +112,13 @@ void md2_hmac_update( md2_context *ctx, const unsigned char *input, int ilen );
  */
 void md2_hmac_finish( md2_context *ctx, unsigned char output[16] );
 
+/**
+ * \brief          MD2 HMAC context reset
+ *
+ * \param ctx      HMAC context to be reset
+ */
+void md2_hmac_reset( md2_context *ctx );
+
 /**
  * \brief          Output = HMAC-MD2( hmac key, input buffer )
  *

include/polarssl/md4.h

@@ -111,6 +111,13 @@ void md4_hmac_update( md4_context *ctx, const unsigned char *input, int ilen );
  */
 void md4_hmac_finish( md4_context *ctx, unsigned char output[16] );
 
+/**
+ * \brief          MD4 HMAC context reset
+ *
+ * \param ctx      HMAC context to be reset
+ */
+void md4_hmac_reset( md4_context *ctx );
+
 /**
  * \brief          Output = HMAC-MD4( hmac key, input buffer )
  *

include/polarssl/md5.h

@@ -113,6 +113,13 @@ void md5_hmac_update( md5_context *ctx,
  */
 void md5_hmac_finish( md5_context *ctx, unsigned char output[16] );
 
+/**
+ * \brief          MD5 HMAC context reset
+ *
+ * \param ctx      HMAC context to be reset
+ */
+void md5_hmac_reset( md5_context *ctx );
+
 /**
  * \brief          Output = HMAC-MD5( hmac key, input buffer )
  *

include/polarssl/sha1.h

@@ -111,6 +111,13 @@ void sha1_hmac_update( sha1_context *ctx, const unsigned char *input, int ilen )
  */
 void sha1_hmac_finish( sha1_context *ctx, unsigned char output[20] );
 
+/**
+ * \brief          SHA-1 HMAC context reset
+ *
+ * \param ctx      HMAC context to be reset
+ */
+void sha1_hmac_reset( sha1_context *ctx );
+
 /**
  * \brief          Output = HMAC-SHA-1( hmac key, input buffer )
  *

include/polarssl/sha2.h

@@ -118,6 +118,13 @@ void sha2_hmac_update( sha2_context *ctx, const unsigned char *input, int ilen )
  */
 void sha2_hmac_finish( sha2_context *ctx, unsigned char output[32] );
 
+/**
+ * \brief          SHA-256 HMAC context reset
+ *
+ * \param ctx      HMAC context to be reset
+ */
+void sha2_hmac_reset( sha2_context *ctx );
+
 /**
  * \brief          Output = HMAC-SHA-256( hmac key, input buffer )
  *

include/polarssl/sha4.h

@@ -126,6 +126,13 @@ void sha4_hmac_update( sha4_context *ctx, const unsigned char *input, int ilen )
  */
 void sha4_hmac_finish( sha4_context *ctx, unsigned char output[64] );
 
+/**
+ * \brief          SHA-512 HMAC context reset
+ *
+ * \param ctx      HMAC context to be reset
+ */
+void sha4_hmac_reset( sha4_context *ctx );
+
 /**
  * \brief          Output = HMAC-SHA-512( hmac key, input buffer )
  *