Diff: aes-gcm/aes.h

Revision:

6:819c17738dc2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/aes-gcm/aes.h	Sun Sep 01 18:15:12 2019 +0000
@@ -0,0 +1,80 @@
+/******************************************************************************
+*
+* THIS SOURCE CODE IS HEREBY PLACED INTO THE PUBLIC DOMAIN FOR THE GOOD OF ALL
+*
+* This is a simple and straightforward implementation of the AES Rijndael
+* 128-bit block cipher designed by Vincent Rijmen and Joan Daemen. The focus
+* of this work was correctness & accuracy.  It is written in 'C' without any
+* particular focus upon optimization or speed. It should be endian (memory
+* byte order) neutral since the few places that care are handled explicitly.
+*
+* This implementation of Rijndael was created by Steven M. Gibson of GRC.com.
+*
+* It is intended for general purpose use, but was written in support of GRC's
+* reference implementation of the SQRL (Secure Quick Reliable Login) client.
+*
+* See:    http://csrc.nist.gov/archive/aes/rijndael/wsdindex.html
+*
+* NO COPYRIGHT IS CLAIMED IN THIS WORK, HOWEVER, NEITHER IS ANY WARRANTY MADE
+* REGARDING ITS FITNESS FOR ANY PARTICULAR PURPOSE. USE IT AT YOUR OWN RISK.
+*
+*******************************************************************************/
+
+#ifndef AES_HEADER
+#define AES_HEADER
+
+/******************************************************************************/
+#define AES_DECRYPTION  0       // whether AES decryption is supported
+/******************************************************************************/
+
+#include <string.h>
+
+#define ENCRYPT         1       // specify whether we're encrypting
+#define DECRYPT         0       // or decrypting
+
+#if defined(_MSC_VER)
+    #include <basetsd.h>
+    typedef UINT32 uint32_t;
+#else
+    #include <inttypes.h>
+#endif
+
+typedef unsigned char uchar;    // add some convienent shorter types
+typedef unsigned int uint;
+
+
+/******************************************************************************
+ *  AES_INIT_KEYGEN_TABLES : MUST be called once before any AES use
+ ******************************************************************************/
+void aes_init_keygen_tables( void );
+
+
+/******************************************************************************
+ *  AES_CONTEXT : cipher context / holds inter-call data
+ ******************************************************************************/
+typedef struct {
+    int mode;           // 1 for Encryption, 0 for Decryption
+    int rounds;         // keysize-based rounds count
+    uint32_t *rk;       // pointer to current round key
+    uint32_t buf[68];   // key expansion buffer
+} aes_context;
+
+
+/******************************************************************************
+ *  AES_SETKEY : called to expand the key for encryption or decryption
+ ******************************************************************************/
+int aes_setkey( aes_context *ctx,       // pointer to context
+                int mode,               // 1 or 0 for Encrypt/Decrypt
+                const uchar *key,       // AES input key
+                uint keysize );         // 128, 192 or 256 bits
+                                        // returns 0 for success
+
+/******************************************************************************
+ *  AES_CIPHER : called to encrypt or decrypt ONE 128-bit block of data
+ ******************************************************************************/
+int aes_cipher( aes_context *ctx,       // pointer to context
+                const uchar input[16],  // 128-bit block to en/decipher
+                uchar output[16] );     // 128-bit output result block
+                                        // returns 0 for success
+
+#endif /* AES_HEADER */