i2d_PKCS7_bio
i = i2d_PKCS7_bio(out, p7);
i = i2d_PKCS7_bio(out, p7);
if (!i2d_PKCS7_bio(out_bio, token))
int i2d_PKCS7_bio(BIO *bp, const PKCS7 *p7);
i2d_PKCS7_bio(out, pkcs7);
ok = i2d_PKCS7_bio(out, pkcs7);