linuxÄÚºËcryto½Ó¿ÚµÄʵÏÖÒÔ¼°ÓëopensslµÄ±È½Ï
linuxÄÚºËʵÏÖÁËcrypto½Ó¿Ú£¬ÓÃÓÚÀàËÆIPSecÖ®ÀàÒªÔÚÄÚºËÖÐʵÏÖµÄÓë²Ù×÷ϵͳ°ó¶¨µÄ°²È«»úÖÆ£¬Èç¹û²»ÊÇÓÃÓÚÕâÑùµÄ»úÖÆ£¬²»ÒªÊ¹ÓÃÄÚºËÖеÄcrypto½Ó¿Ú£¬×ܵÄÀ´Ëµ£¬linuxµÄcryptoÖÐ×îÖØÒªµÄ½á¹¹ÌåÓÐÁ½¸ö£ºcrypto_tfmºÍcrypto_alg
struct crypto_tfm {
u32 crt_flags;
union {
struct cipher_tfm cipher;
struct digest_tfm digest;
struct compress_tfm compress;
} crt_u; //¸ÃÁªºÏÌåÖ¸³ölinuxʵÏÖÁËcipher£¬digestºÍcompressÈýÀàËã·¨£¬Ã¿Ò»ÀàÖÐÓÐÐí¶àÖÖËã·¨£¬×¢ÒâÕâ¸öÁªºÏµÄÿһ¸ö¶¼½ö½öʵÏÖÁËÒ»´óÀàËã·¨µÄʵÏÖ·â×°£¬²¢²»ÊǾßÌåµÄʵÏÖ¡£
struct crypto_alg *__crt_alg;
char __crt_ctx[] __attribute__ ((__aligned__));
};
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struct crypto_alg {
struct list_head cra_list;
u32 cra_flags; //Õâ¸öflagsºÜÖØÒª
unsigned int cra_blocksize;
unsigned int cra_ctxsize;
unsigned int cra_alignmask;
int cra_priority;
char cra_name[CRYPTO_MAX_ALG_NAME];
char cra_driver_name[CRYPTO_MAX_ALG_NAME];
union {
struct cipher_alg cipher;
struct digest_alg digest;
struct compress_alg compress;
} cra_u;
int (*cra_init)(struct crypto_tfm *tfm);
void (*cra_exit)(struct crypto_tfm *tfm);
struct module *cra_module;
};
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