sarnold/af_alg

struct af_alg_cipher_data
{
    int tfmfd;
    int op;
    uint32_t type;
};
#define CIPHER_DATA(ctx) ((struct af_alg_cipher_data*)(ctx->cipher_data))


#define DECLARE_CIPHER_INIT_KEY(alias, name)\
static int af_alg_##alias##_init_key (EVP_CIPHER_CTX *ctx,    \
    const unsigned char *key,                               \
    const unsigned char *iv __U__,                          \
    int enc __U__)                                          \
{                                                            \
    static struct sockaddr_alg sa = {                              \
        .salg_family = AF_ALG,                              \
        .salg_type = "skcipher",                            \
        .salg_name = #name,                              \
    };                                                        \
    return af_alg_CIPHER_init_key(ctx, &sa, key, iv, enc);    \
}

#define DEFINE_CIPHER_INIT_KEY(alias, name)\
static int af_alg_##alias##_init_key (EVP_CIPHER_CTX *ctx,    \
    const unsigned char *key,                               \
    const unsigned char *iv __U__,                          \
    int enc __U__);

#define DECLARE_CIPHER_CLEANUP_KEY(name)                    \
static int af_alg_##name##_cleanup_key(EVP_CIPHER_CTX *ctx)    \
{                                                           \
    return af_alg_CIPHER_cleanup_key(ctx);                    \
}

#define DEFINE_CIPHER_CLEANUP_KEY(name)                        \
int af_alg_##name##_cleanup_key(EVP_CIPHER_CTX *ctx);


#define DECLARE_CIPHER_DO_CIPHER(name)                        \
static int af_alg_##name##_do_cipher(EVP_CIPHER_CTX *ctx,     \
unsigned char *out_arg,                                     \
const unsigned char *in_arg, size_t nbytes)                    \
{                                                           \
    return af_alg_CIPHER_do_cipher(ctx, out_arg, in_arg, nbytes);\
}

#define DEFINE_CIPHER_DO_CIPHER(name)                        \
int af_alg_##name##_do_cipher(EVP_CIPHER_CTX *ctx);


#define DECLARE_CIPHER(name, param)\
DECLARE_CIPHER_INIT_KEY(name, param)\
DECLARE_CIPHER_CLEANUP_KEY(name)\
DECLARE_CIPHER_DO_CIPHER(name)

int af_alg_CIPHER_init_key(EVP_CIPHER_CTX *ctx, const struct sockaddr_alg *sa, const unsigned char *key, const unsigned char *iv __U__, int enc __U__);
int af_alg_CIPHER_cleanup_key(EVP_CIPHER_CTX *ctx);
int af_alg_CIPHER_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg, const unsigned char *in_arg, size_t nbytes);

int af_alg_list_ciphers(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid);