Support ChaCha20+Poly1305 cipher suites.

nss/lib/softoken/pkcs11i.h

Index: nss/lib/softoken/pkcs11i.h
===================================================================
--- nss/lib/softoken/pkcs11i.h	(revision 228205)
+++ nss/lib/softoken/pkcs11i.h	(working copy)
@@ -14,6 +14,7 @@
 #include "pkcs11t.h"
 
 #include "sftkdbt.h" 
+#include "chacha20poly1305.h"
 #include "hasht.h"
 
 /* 
@@ -104,6 +105,7 @@
 typedef struct SFTKOAEPEncryptInfoStr SFTKOAEPEncryptInfo;
 typedef struct SFTKOAEPDecryptInfoStr SFTKOAEPDecryptInfo;
 typedef struct SFTKSSLMACInfoStr SFTKSSLMACInfo;
+typedef struct SFTKChaCha20Poly1305InfoStr SFTKChaCha20Poly1305Info;
 typedef struct SFTKItemTemplateStr SFTKItemTemplate;
 
 /* define function pointer typdefs for pointer tables */
@@ -399,6 +401,16 @@
     unsigned int	keySize;
 };
 
+/* SFTKChaCha20Poly1305Info saves the key, tag length, nonce, and additional
+ * data for a ChaCha20+Poly1305 AEAD operation. */
+struct SFTKChaCha20Poly1305InfoStr {
+    ChaCha20Poly1305Context freeblCtx;
+    unsigned char nonce[8];
+    unsigned char ad[16];
+    unsigned char *adOverflow;
+    unsigned int adLen;
+};
+
 /*
  * Template based on SECItems, suitable for passing as arrays
  */