int ssh_add_identity(AuthenticationConnection *, Key *, const char *);
int ssh_remove_identity(AuthenticationConnection *, Key *);
int ssh_remove_all_identities(AuthenticationConnection *, int);
int ssh_add_identity(AuthenticationConnection *, Key *, const char *);
int ssh_remove_identity(AuthenticationConnection *, Key *);
int ssh_remove_all_identities(AuthenticationConnection *, int);