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29 * Copyright 2006 Develer S.r.l. (http://www.develer.com/)
33 * \brief AES Advanced Encryption Standard implementation
35 * \author Giovanni Bajo <rasky@develer.com>
37 * $WIZ$ module_name = "aes"
42 #include <cfg/compiler.h>
43 #include <cpu/byteorder.h>
47 // AES only supports Nb=4
48 #define Nb 4 // number of columns in the state & expanded key
61 #if CPU_REG_BITS == 32
63 // 32-bit optimized implementation
68 // Full 8-bit implementation
74 /******************************************************************************/
76 void AES128_init(AES128_Context *aes_)
78 AES_Context *aes = (AES_Context *)aes_;
79 aes->c.set_key = AES_expandKey;
80 aes->c.enc_block = AES_encrypt;
81 aes->c.dec_block = AES_decrypt;
82 aes->c.block_len = Nb*4;
87 void AES192_init(AES192_Context *aes_)
89 AES_Context *aes = (AES_Context *)aes_;
90 aes->c.set_key = AES_expandKey;
91 aes->c.enc_block = AES_encrypt;
92 aes->c.dec_block = AES_decrypt;
93 aes->c.block_len = Nb*4;
98 void AES256_init(AES256_Context *aes_)
100 AES_Context *aes = (AES_Context *)aes_;
101 aes->c.set_key = AES_expandKey;
102 aes->c.enc_block = AES_encrypt;
103 aes->c.dec_block = AES_decrypt;
104 aes->c.block_len = Nb*4;
106 aes->num_rounds = 14;