int PEM_read_bio(BIO *bp, char **name, char **header,
unsigned char **data, long *len);
int PEM_write_bio(BIO *bp, const char *name, const char *hdr,
int PEM_read_bio(BIO *bp, char **name, char **header,
unsigned char **data, long *len);
int PEM_write_bio(BIO *bp, const char *name, const char *hdr,