documentation for PICrypt

git-svn-id: svn://db.shs.com.ru/pip@102 12ceb7fc-bf1f-11e4-8940-5bc7170c53b5

src/math/picrypt.cpp

@@ -21,6 +21,8 @@
 #ifdef PIP_CRYPT
 #  include "sodium.h"
 #endif
+
+
 const char hash_def_key[] = "_picrypt_";
 
 
@@ -144,6 +146,17 @@ PIByteArray PICrypt::hash(const PIString & secret) {
 }
 
 
+PIByteArray PICrypt::generateKey() {
+	PIByteArray hash;
+#ifdef PIP_CRYPT
+	sodium_init();
+	hash.resize(crypto_secretbox_KEYBYTES);
+	randombytes_buf(hash.data(), hash.size());
+#endif
+	return hash;
+}
+
+
 int PICrypt::sizeKey() {
 #ifdef PIP_CRYPT
 	return crypto_secretbox_KEYBYTES;