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Diffstat (limited to 'libtomcrypt/src/encauth/ccm/ccm_reset.c')
-rw-r--r--libtomcrypt/src/encauth/ccm/ccm_reset.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/libtomcrypt/src/encauth/ccm/ccm_reset.c b/libtomcrypt/src/encauth/ccm/ccm_reset.c
new file mode 100644
index 0000000..c2d0cae
--- /dev/null
+++ b/libtomcrypt/src/encauth/ccm/ccm_reset.c
@@ -0,0 +1,35 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+#include "tomcrypt.h"
+
+#ifdef LTC_CCM_MODE
+
+/**
+ Reset a CCM state to as if you just called ccm_init(). This saves the initialization time.
+ @param ccm The CCM state to reset
+ @return CRYPT_OK on success
+*/
+int ccm_reset(ccm_state *ccm)
+{
+ LTC_ARGCHK(ccm != NULL);
+ zeromem(ccm->PAD, sizeof(ccm->PAD));
+ zeromem(ccm->ctr, sizeof(ccm->ctr));
+ zeromem(ccm->CTRPAD, sizeof(ccm->CTRPAD));
+ ccm->CTRlen = 0;
+ ccm->current_ptlen = 0;
+ ccm->current_aadlen = 0;
+
+ return CRYPT_OK;
+}
+
+#endif
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */