+ unsigned long flags;
+ int (*init)(EVP_MD_CTX *ctx);
+ int (*update)(EVP_MD_CTX *ctx,const void *data,size_t count);
+ int (*final)(EVP_MD_CTX *ctx,unsigned char *md);
+ int (*copy)(EVP_MD_CTX *to,const EVP_MD_CTX *from);
+ int (*cleanup)(EVP_MD_CTX *ctx);
+
+ /* FIXME: prototype these some day */
+ int (*sign)(int type, const unsigned char *m, unsigned int m_length,
+ unsigned char *sigret, unsigned int *siglen, void *key);
+ int (*verify)(int type, const unsigned char *m, unsigned int m_length,
+ const unsigned char *sigbuf, unsigned int siglen,
+ void *key);