| #ifndef _AES_H_ |
| #define _AES_H_ |
| #include <stdint.h> |
| |
| struct AesContext { |
| uint32_t K[64]; |
| }; |
| |
| struct AesSetupTempWorksSpace { //unsed temporarily for aesInitForDecr() only, not used after, need not be live |
| struct AesContext tmpCtx; |
| }; |
| |
| #define AES_KEY_WORDS 8 |
| #define AES_BLOCK_WORDS 4 |
| |
| //basic AES block ops |
| void aesInitForEncr(struct AesContext *ctx, const uint32_t *k); |
| void aesInitForDecr(struct AesContext *ctx, struct AesSetupTempWorksSpace *tmpSpace, const uint32_t *k); |
| void aesEncr(struct AesContext *ctx, const uint32_t *src, uint32_t *dst); //encrypts AES_BLOCK_WORDS words |
| void aesDecr(struct AesContext *ctx, const uint32_t *src, uint32_t *dst); //deencrypts AES_BLOCK_WORDS words |
| |
| //AES-CBC |
| struct AesCbcContext { |
| struct AesContext aes; |
| uint32_t iv[AES_BLOCK_WORDS]; |
| }; |
| |
| void aesCbcInitForEncr(struct AesCbcContext *ctx, const uint32_t *k, const uint32_t *iv); |
| void aesCbcInitForDecr(struct AesCbcContext *ctx, const uint32_t *k, const uint32_t *iv); |
| void aesCbcEncr(struct AesCbcContext *ctx, const uint32_t *src, uint32_t *dst); //encrypts AES_BLOCK_WORDS words |
| void aesCbcDecr(struct AesCbcContext *ctx, const uint32_t *src, uint32_t *dst); //encrypts AES_BLOCK_WORDS words |
| |
| |
| #endif |
| |
