diff options
Diffstat (limited to 'tvix/nix-compat/src/nixhash')
| -rw-r--r-- | tvix/nix-compat/src/nixhash/algos.rs | 21 | ||||
| -rw-r--r-- | tvix/nix-compat/src/nixhash/ca_hash.rs | 246 |
2 files changed, 200 insertions, 67 deletions
diff --git a/tvix/nix-compat/src/nixhash/algos.rs b/tvix/nix-compat/src/nixhash/algos.rs index f189eba09d..ac8915314c 100644 --- a/tvix/nix-compat/src/nixhash/algos.rs +++ b/tvix/nix-compat/src/nixhash/algos.rs @@ -5,7 +5,7 @@ use serde::{Deserialize, Serialize}; use crate::nixhash::Error; /// This are the hash algorithms supported by cppnix. -#[derive(Clone, Copy, Debug, Eq, PartialEq, Serialize, Deserialize)] +#[derive(Clone, Copy, Debug, Eq, PartialEq)] pub enum HashAlgo { Md5, Sha1, @@ -36,6 +36,25 @@ impl Display for HashAlgo { } } +impl Serialize for HashAlgo { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: serde::Serializer, + { + serializer.collect_str(&self) + } +} + +impl<'de> Deserialize<'de> for HashAlgo { + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: serde::Deserializer<'de>, + { + let s: &str = Deserialize::deserialize(deserializer)?; + HashAlgo::try_from(s).map_err(serde::de::Error::custom) + } +} + /// TODO(Raito): this could be automated via macros, I suppose. /// But this may be more expensive than just doing it by hand /// and ensuring that is kept in sync. diff --git a/tvix/nix-compat/src/nixhash/ca_hash.rs b/tvix/nix-compat/src/nixhash/ca_hash.rs index d69d19ce68..1c2f61dc6c 100644 --- a/tvix/nix-compat/src/nixhash/ca_hash.rs +++ b/tvix/nix-compat/src/nixhash/ca_hash.rs @@ -1,5 +1,5 @@ use crate::nixbase32; -use crate::nixhash::{self, HashAlgo, NixHash}; +use crate::nixhash::{HashAlgo, NixHash}; use serde::de::Unexpected; use serde::ser::SerializeMap; use serde::{Deserialize, Deserializer, Serialize, Serializer}; @@ -7,7 +7,7 @@ use serde_json::{Map, Value}; use std::borrow::Cow; use super::algos::SUPPORTED_ALGOS; -use super::from_algo_and_digest; +use super::decode_digest; /// A Nix CAHash describes a content-addressed hash of a path. /// @@ -99,73 +99,40 @@ impl CAHash { return Ok(None); } - let digest: Vec<u8> = { - if let Some(v) = map.get("hash") { - if let Some(s) = v.as_str() { - data_encoding::HEXLOWER - .decode(s.as_bytes()) - .map_err(|e| serde::de::Error::custom(e.to_string()))? - } else { - return Err(serde::de::Error::invalid_type( - Unexpected::Other(&v.to_string()), - &"a string", - )); - } - } else { - return Err(serde::de::Error::missing_field( - "couldn't extract `hash` key but `hashAlgo` key present", - )); - } + let hash_algo_v = map.get("hashAlgo").ok_or_else(|| { + serde::de::Error::missing_field( + "couldn't extract `hashAlgo` key, but `hash` key present", + ) + })?; + let hash_algo = hash_algo_v.as_str().ok_or_else(|| { + serde::de::Error::invalid_type(Unexpected::Other(&hash_algo_v.to_string()), &"a string") + })?; + let (mode_is_nar, hash_algo) = if let Some(s) = hash_algo.strip_prefix("r:") { + (true, s) + } else { + (false, hash_algo) }; + let hash_algo = HashAlgo::try_from(hash_algo).map_err(|e| { + serde::de::Error::invalid_value( + Unexpected::Other(&e.to_string()), + &format!("one of {}", SUPPORTED_ALGOS.join(",")).as_str(), + ) + })?; - if let Some(v) = map.get("hashAlgo") { - if let Some(s) = v.as_str() { - match s.strip_prefix("r:") { - Some(rest) => Ok(Some(Self::Nar( - from_algo_and_digest( - HashAlgo::try_from(rest).map_err(|e| { - serde::de::Error::invalid_value( - Unexpected::Other(&e.to_string()), - &format!("one of {}", SUPPORTED_ALGOS.join(",")).as_str(), - ) - })?, - &digest, - ) - .map_err(|e: nixhash::Error| { - serde::de::Error::invalid_value( - Unexpected::Other(&e.to_string()), - &"a digest with right length", - ) - })?, - ))), - None => Ok(Some(Self::Flat( - from_algo_and_digest( - HashAlgo::try_from(s).map_err(|e| { - serde::de::Error::invalid_value( - Unexpected::Other(&e.to_string()), - &format!("one of {}", SUPPORTED_ALGOS.join(",")).as_str(), - ) - })?, - &digest, - ) - .map_err(|e: nixhash::Error| { - serde::de::Error::invalid_value( - Unexpected::Other(&e.to_string()), - &"a digest with right length", - ) - })?, - ))), - } - } else { - Err(serde::de::Error::invalid_type( - Unexpected::Other(&v.to_string()), - &"a string", - )) - } + let hash_v = map.get("hash").ok_or_else(|| { + serde::de::Error::missing_field( + "couldn't extract `hash` key but `hashAlgo` key present", + ) + })?; + let hash = hash_v.as_str().ok_or_else(|| { + serde::de::Error::invalid_type(Unexpected::Other(&hash_v.to_string()), &"a string") + })?; + let hash = decode_digest(hash.as_bytes(), hash_algo) + .map_err(|e| serde::de::Error::custom(e.to_string()))?; + if mode_is_nar { + Ok(Some(Self::Nar(hash))) } else { - Err(serde::de::Error::missing_field( - "couldn't extract `hashAlgo` key, but `hash` key present", - )) + Ok(Some(Self::Flat(hash))) } } } @@ -211,3 +178,150 @@ impl<'de> Deserialize<'de> for CAHash { } } } + +#[cfg(test)] +mod tests { + use crate::{derivation::CAHash, nixhash}; + + #[test] + fn serialize_flat() { + let json_bytes = r#"{ + "hash": "1fnf2m46ya7r7afkcb8ba2j0sc4a85m749sh9jz64g4hx6z3r088", + "hashAlgo": "sha256" +}"#; + let hash = CAHash::Flat( + nixhash::from_nix_str( + "sha256:08813cbee9903c62be4c5027726a418a300da4500b2d369d3af9286f4815ceba", + ) + .unwrap(), + ); + let serialized = serde_json::to_string_pretty(&hash).unwrap(); + assert_eq!(serialized, json_bytes); + } + + #[test] + fn serialize_nar() { + let json_bytes = r#"{ + "hash": "1fnf2m46ya7r7afkcb8ba2j0sc4a85m749sh9jz64g4hx6z3r088", + "hashAlgo": "r:sha256" +}"#; + let hash = CAHash::Nar( + nixhash::from_nix_str( + "sha256:08813cbee9903c62be4c5027726a418a300da4500b2d369d3af9286f4815ceba", + ) + .unwrap(), + ); + let serialized = serde_json::to_string_pretty(&hash).unwrap(); + assert_eq!(serialized, json_bytes); + } + + #[test] + fn deserialize_flat() { + let json_bytes = r#" + { + "hash": "08813cbee9903c62be4c5027726a418a300da4500b2d369d3af9286f4815ceba", + "hashAlgo": "sha256" + }"#; + let hash: CAHash = serde_json::from_str(json_bytes).expect("must parse"); + + assert_eq!( + hash, + CAHash::Flat( + nixhash::from_nix_str( + "sha256:08813cbee9903c62be4c5027726a418a300da4500b2d369d3af9286f4815ceba" + ) + .unwrap() + ) + ); + } + + #[test] + fn deserialize_hex() { + let json_bytes = r#" + { + "hash": "08813cbee9903c62be4c5027726a418a300da4500b2d369d3af9286f4815ceba", + "hashAlgo": "r:sha256" + }"#; + let hash: CAHash = serde_json::from_str(json_bytes).expect("must parse"); + + assert_eq!( + hash, + CAHash::Nar( + nixhash::from_nix_str( + "sha256:08813cbee9903c62be4c5027726a418a300da4500b2d369d3af9286f4815ceba" + ) + .unwrap() + ) + ); + } + + #[test] + fn deserialize_nixbase32() { + let json_bytes = r#" + { + "hash": "1fnf2m46ya7r7afkcb8ba2j0sc4a85m749sh9jz64g4hx6z3r088", + "hashAlgo": "r:sha256" + }"#; + let hash: CAHash = serde_json::from_str(json_bytes).expect("must parse"); + + assert_eq!( + hash, + CAHash::Nar( + nixhash::from_nix_str( + "sha256:08813cbee9903c62be4c5027726a418a300da4500b2d369d3af9286f4815ceba" + ) + .unwrap() + ) + ); + } + + #[test] + fn deserialize_base64() { + let json_bytes = r#" + { + "hash": "CIE8vumQPGK+TFAncmpBijANpFALLTadOvkob0gVzro=", + "hashAlgo": "r:sha256" + }"#; + let hash: CAHash = serde_json::from_str(json_bytes).expect("must parse"); + + assert_eq!( + hash, + CAHash::Nar( + nixhash::from_nix_str( + "sha256:08813cbee9903c62be4c5027726a418a300da4500b2d369d3af9286f4815ceba" + ) + .unwrap() + ) + ); + } + + #[test] + fn serialize_deserialize_nar() { + let json_bytes = r#" + { + "hash": "08813cbee9903c62be4c5027726a418a300da4500b2d369d3af9286f4815ceba", + "hashAlgo": "r:sha256" + }"#; + let hash: CAHash = serde_json::from_str(json_bytes).expect("must parse"); + + let serialized = serde_json::to_string(&hash).expect("Serialize"); + let hash2: CAHash = serde_json::from_str(&serialized).expect("must parse again"); + + assert_eq!(hash, hash2); + } + + #[test] + fn serialize_deserialize_flat() { + let json_bytes = r#" + { + "hash": "08813cbee9903c62be4c5027726a418a300da4500b2d369d3af9286f4815ceba", + "hashAlgo": "sha256" + }"#; + let hash: CAHash = serde_json::from_str(json_bytes).expect("must parse"); + + let serialized = serde_json::to_string(&hash).expect("Serialize"); + let hash2: CAHash = serde_json::from_str(&serialized).expect("must parse again"); + + assert_eq!(hash, hash2); + } +} |