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Merge pull request #80 from decentralized-identity/fix_delegation
Update delegation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,115 @@ | ||
| use std::str::FromStr; | ||
|
|
||
| use base64::URL_SAFE_NO_PAD; | ||
| use serde::{Deserialize, Serialize}; | ||
|
|
||
| use crate::{ | ||
| error::Error, | ||
| prefix::{Prefix, SelfAddressingPrefix}, | ||
| }; | ||
|
|
||
| use super::{parse::counter, payload_size::PayloadType}; | ||
|
|
||
| #[derive(Debug, Clone, Deserialize, PartialEq)] | ||
| pub enum Attachment { | ||
| SealSourceCouplets(Vec<SourceSeal>), | ||
| } | ||
|
|
||
| impl Attachment { | ||
| pub fn serialize(&self) -> Result<Vec<u8>, Error> { | ||
| match self { | ||
| Attachment::SealSourceCouplets(sources) => { | ||
| let payload_type = PayloadType::MG; | ||
| let serialzied_sources = sources | ||
| .into_iter() | ||
| .map(|s| s.serialize().unwrap()) | ||
| .flatten(); | ||
| Ok(payload_type | ||
| .adjust_with_num(sources.len() as u16) | ||
| .as_bytes() | ||
| .to_vec() | ||
| .into_iter() | ||
| .chain(serialzied_sources) | ||
| .collect::<Vec<_>>()) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl FromStr for Attachment { | ||
| type Err = Error; | ||
|
|
||
| fn from_str(s: &str) -> Result<Self, Self::Err> { | ||
| match &s[0..2] { | ||
| "-G" => { | ||
| let (rest, counter) = counter(s.as_bytes()) | ||
| .map_err(|_e| Error::SemanticError("Can't parse counter".into()))?; | ||
| if rest.is_empty() { | ||
| Ok(counter) | ||
| } else { | ||
| Err(Error::SemanticError("Can't parse counter".into())) | ||
| } | ||
| } | ||
| _ => Err(Error::DeserializeError("Unknown counter code".into())), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| #[derive(Debug, Clone, Serialize, Deserialize, PartialEq)] | ||
| pub struct SourceSeal { | ||
| pub sn: u64, | ||
| pub digest: SelfAddressingPrefix, | ||
| } | ||
|
|
||
| impl SourceSeal { | ||
| pub fn new(sn: u64, digest: SelfAddressingPrefix) -> Self { | ||
| Self { sn, digest } | ||
| } | ||
| pub fn serialize(&self) -> Result<Vec<u8>, Error> { | ||
| Ok([pack_sn(self.sn), self.digest.to_str()] | ||
| .join("") | ||
| .as_bytes() | ||
| .to_vec()) | ||
| } | ||
| } | ||
|
|
||
| fn pack_sn(sn: u64) -> String { | ||
| let payload_type = PayloadType::OA; | ||
| let sn_raw: Vec<u8> = sn.to_be_bytes().into(); | ||
| // Calculate how many zeros are missing to achieve expected base64 string | ||
| // length. Master code size is expected padding size. | ||
| let missing_zeros = payload_type.size() / 4 * 3 - payload_type.master_code_size(false) - sn_raw.len(); | ||
| let sn_vec: Vec<u8> = std::iter::repeat(0).take(missing_zeros).chain(sn_raw).collect(); | ||
| [ | ||
| payload_type.to_string(), | ||
| base64::encode_config(sn_vec, URL_SAFE_NO_PAD), | ||
| ] | ||
| .join("") | ||
| } | ||
|
|
||
| #[test] | ||
| fn test_parse_attachement() -> Result<(), Error> { | ||
| let attached_str = "-GAC0AAAAAAAAAAAAAAAAAAAAAAQE3fUycq1G-P1K1pL2OhvY6ZU-9otSa3hXiCcrxuhjyII0AAAAAAAAAAAAAAAAAAAAAAQE3fUycq1G-P1K1pL2OhvY6ZU-9otSa3hXiCcrxuhjyII"; | ||
| let attached_sn_dig: Attachment = attached_str.parse()?; | ||
| assert_eq!( | ||
| attached_str, | ||
| String::from_utf8(attached_sn_dig.serialize()?).unwrap() | ||
| ); | ||
| match attached_sn_dig { | ||
| Attachment::SealSourceCouplets(sources) => { | ||
| let s1 = sources[0].clone(); | ||
| let s2 = sources[1].clone(); | ||
| assert_eq!(s1.sn, 1); | ||
| assert_eq!( | ||
| s1.digest.to_str(), | ||
| "E3fUycq1G-P1K1pL2OhvY6ZU-9otSa3hXiCcrxuhjyII" | ||
| ); | ||
| assert_eq!(s2.sn, 1); | ||
| assert_eq!( | ||
| s2.digest.to_str(), | ||
| "E3fUycq1G-P1K1pL2OhvY6ZU-9otSa3hXiCcrxuhjyII" | ||
| ); | ||
| } | ||
| }; | ||
| Ok(()) | ||
| } |
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