#ifndef OPENSSL_NO_SIV
typedef struct siv128_context SIV128_CONTEXT;
SIV128_CONTEXT *ossl_siv128_new(const unsigned char *key, int klen,
EVP_CIPHER *cbc, EVP_CIPHER *ctr,
OSSL_LIB_CTX *libctx, const char *propq);
int ossl_siv128_init(SIV128_CONTEXT *ctx, const unsigned char *key, int klen,
const EVP_CIPHER *cbc, const EVP_CIPHER *ctr,
OSSL_LIB_CTX *libctx, const char *propq);
int ossl_siv128_copy_ctx(SIV128_CONTEXT *dest, SIV128_CONTEXT *src);
int ossl_siv128_aad(SIV128_CONTEXT *ctx, const unsigned char *aad, size_t len);
int ossl_siv128_encrypt(SIV128_CONTEXT *ctx,
const unsigned char *in, unsigned char *out, size_t len);
int ossl_siv128_decrypt(SIV128_CONTEXT *ctx,
const unsigned char *in, unsigned char *out, size_t len);
int ossl_siv128_finish(SIV128_CONTEXT *ctx);
int ossl_siv128_set_tag(SIV128_CONTEXT *ctx, const unsigned char *tag,
size_t len);
int ossl_siv128_get_tag(SIV128_CONTEXT *ctx, unsigned char *tag, size_t len);
int ossl_siv128_cleanup(SIV128_CONTEXT *ctx);
int ossl_siv128_speed(SIV128_CONTEXT *ctx, int arg);
#endif