https://en.wikipedia.org/wiki/Digest_access_authentication
https://www.w3.org/Protocols/rfc2069/rfc2069

HA1 = MD5(username:realm:password)
HA2 = MD5(method:digestURI)
response = MD5(HA1:nonce:HA2)

或者

HA1 = MD5(username:realm:password)
HA2 = MD5(method:digestURI)
response = MD5(HA1:nonce:nonceCount:cnonce:qop:HA2)

ha1 和 ha1 都是hex string, 作为 response的输入参数

https://raw.githubusercontent.com/jmurley/sip_md5/main/sip_md5.py