PEM_do_header
if (!PEM_do_header(&cipher, data, &len, cb, u))
if (!PEM_do_header(&cipher, data, &len, cb, u))
|| !PEM_do_header(&cipher, *data, len, file_get_pem_pass,
int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *len,
|| !PEM_do_header(&cipher, der, &der_len,