BASE64_URLSAFE
oname->name, false, BASE64_URLSAFE);
fname->crypto_buf.name, false, BASE64_URLSAFE);
[BASE64_URLSAFE] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_",
[BASE64_URLSAFE] = BASE64_REV_INIT('-', '_'),
n_url = base64_encode(sample1, sizeof(sample1), url_buf, false, BASE64_URLSAFE);
m = base64_decode(url_buf, n_url, back, false, BASE64_URLSAFE);
m = base64_decode(bad, strlen(bad), tmp, false, BASE64_URLSAFE);