int PEM_write_bio(BIO *bp, const char *name, const char *hdr,
const unsigned char *data, long len);
int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
int PEM_write_bio(BIO *bp, const char *name, const char *hdr,
const unsigned char *data, long len);
int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,