-static int sign (X509 *x, EVP_PKEY *pkey,int days,EVP_MD *digest);
-static int x509_certify (X509_STORE *ctx,char *CAfile, EVP_MD *digest,X509 *x,
- X509 *xca, EVP_PKEY *pkey,char *serial, int create, int days);
+static int sign (X509 *x, EVP_PKEY *pkey,int days,const EVP_MD *digest);
+static int x509_certify (X509_STORE *ctx,char *CAfile,const EVP_MD *digest,
+ X509 *x,X509 *xca,EVP_PKEY *pkey,char *serial,
+ int create,int days);