ASN1_i2d_bio_of
return ASN1_i2d_bio_of(EC_KEY, i2d_ECPrivateKey, bp, eckey);
return ASN1_i2d_bio_of(EVP_PKEY, i2d_PrivateKey, bp, pkey);
#define i2d_SSL_SESSION_bio(bp,s_id) ASN1_i2d_bio_of(SSL_SESSION,i2d_SSL_SESSION,bp,s_id)