- Added GCM ciphersuites to TLS implementation
diff --git a/include/polarssl/gcm.h b/include/polarssl/gcm.h
index 14b04d2..2f88c70 100644
--- a/include/polarssl/gcm.h
+++ b/include/polarssl/gcm.h
@@ -35,6 +35,7 @@
#define GCM_DECRYPT 0
#define POLARSSL_ERR_GCM_AUTH_FAILED -0x0012 /**< Authenticated decryption failed. */
+#define POLARSSL_ERR_GCM_BAD_INPUT -0x0014 /**< Bad input parameters to function. */
/**
* \brief GCM context structure
@@ -64,6 +65,11 @@
/**
* \brief GCM buffer encryption/decryption using AES
*
+ * \note On encryption, the output buffer can be the same as the input buffer.
+ * On decryption, the output buffer cannot be the same as input buffer.
+ * If buffers overlap, the output buffer must trail at least 8 bytes
+ * behind the input buffer.
+ *
* \param ctx GCM context
* \param mode GCM_ENCRYPT or GCM_DECRYPT
* \param length length of the input data
@@ -93,6 +99,10 @@
/**
* \brief GCM buffer authenticated decryption using AES
*
+ * \note On decryption, the output buffer cannot be the same as input buffer.
+ * If buffers overlap, the output buffer must trail at least 8 bytes
+ * behind the input buffer.
+ *
* \param ctx GCM context
* \param length length of the input data
* \param iv initialization vector