first lines of a blockcipher abstraction layer

[avr-crypto-lib.git] / blockcipher_descriptor.h

diff --git a/blockcipher_descriptor.h b/blockcipher_descriptor.h
new file mode 100644 (file)
index 0000000..4dc3c55
--- /dev/null
+++ b/blockcipher_descriptor.h
@@ -0,0 +1,69 @@
+/* blockcipher_descriptor.h */
+
+#ifndef BLOCKCIPHER_DESCRIPTOR_H_
+#define BLOCKCIPHER_DESCRIPTOR_H_
+#include <stdint.h>
+#include <avr/pgmspace.h>
+
+typedef void(*void_fpt)(void);
+typedef void(*bc_init1_fpt)(void*, void*);
+typedef void(*bc_init2_fpt)(void*, uint16_t,void*);
+typedef void(*bc_enc1_fpt)(void*, void*);
+typedef void(*bc_enc2_fpt)(void*, void*, void*);
+typedef void(*bc_dec1_fpt)(void*, void*);
+typedef void(*bc_dec2_fpt)(void*, void*, void*);
+typedef void(*bc_free_fpt)(void*);
+
+typedef union{
+       void_fpt  initvoid;
+       bc_init1_fpt init1;
+       bc_init2_fpt init2;
+} bc_init_fpt;
+
+typedef union{
+       void_fpt  encvoid;
+       bc_enc1_fpt enc1;
+       bc_enc2_fpt enc2;
+} bc_enc_fpt;
+
+typedef union{
+       void_fpt  decvoid;
+       bc_dec1_fpt dec1;
+       bc_dec2_fpt dec2;
+} bc_dec_fpt;
+
+#define BC_INIT_TYPE   0x01
+#define BC_INIT_TYPE_1 0x00
+#define BC_INIT_TYPE_2 0x01
+
+#define BC_ENC_TYPE    0x02
+#define BC_ENC_TYPE_1  0x00
+#define BC_ENC_TYPE_2  0x02
+#
+#define BC_DEC_TYPE    0x04
+#define BC_DEC_TYPE_1  0x00
+#define BC_DEC_TYPE_2  0x04
+
+#define BCDESC_TYPE_BLOCKCIPHER 0x01
+
+typedef struct {
+       uint8_t  type; /* 1==blockcipher */
+       uint8_t  flags;
+       PGM_P    name;
+       uint16_t ctxsize_B;
+       uint16_t blocksize_b;
+       bc_init_fpt init;
+       bc_enc_fpt  enc;
+       bc_dec_fpt  dec;
+       bc_free_fpt free;
+       PGM_VOID_P valid_keysize_desc;
+} bcdesc_t; /* blockcipher descriptor type */
+
+typedef struct{
+       bcdesc_t* desc_ptr;
+       uint16_t  keysize;
+       void*     ctx;
+} bcgen_ctx_t;
+
+#endif /* BLOCKCIPHER_DESCRIPTOR_H_ */
+