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fix: 抽象官方库存与 sidecar hash 策略

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nyaKazuha
2026-08-02 23:12:25 +08:00
parent ba28e067c9
commit 2b053e247d
4 changed files with 190 additions and 123 deletions
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adapters/src/official/backend.rs
+168 -27
View File
@@ -23,8 +23,74 @@ pub struct PlatformCatalogInput<'a> {
pub media_catalog: &'a [u8],
}
/// Platform catalog parser selected by an official resource backend.
pub trait InventoryParser: Send + Sync {
/// Parses verified seed catalog payloads into a platform-aware inventory.
fn parse_inventory(
&self,
table_catalog: &[u8],
platform_catalogs: &[PlatformCatalogInput<'_>],
) -> YostarJpPlatformDownloadInventory;
}
/// Verification result returned by a sidecar hash strategy.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct SidecarHashVerification {
/// Decimal or textual expected digest parsed from the sidecar.
pub expected: String,
/// Digest computed from the resource bytes.
pub actual: String,
}
/// Hash sidecar policy independent from download orchestration.
pub trait SidecarHashStrategy: Send + Sync {
/// Stable algorithm identifier used in diagnostics.
fn algorithm_id(&self) -> &'static str;
/// Parses and verifies one resource payload against a sidecar.
fn verify(&self, data: &[u8], sidecar: &[u8]) -> Result<SidecarHashVerification, String>;
}
/// Official JP decimal `xxHash32(seed=0)` sidecar strategy.
#[derive(Debug, Clone, Copy, Default)]
pub struct XxHash32DecimalSeedZero;
impl XxHash32DecimalSeedZero {
/// Computes the decimal digest used by this sidecar strategy.
pub fn digest(self, data: &[u8]) -> String {
xxhash32(data).to_string()
}
}
impl SidecarHashStrategy for XxHash32DecimalSeedZero {
fn algorithm_id(&self) -> &'static str {
"xxhash32_decimal"
}
fn verify(&self, data: &[u8], sidecar: &[u8]) -> Result<SidecarHashVerification, String> {
let expected = std::str::from_utf8(sidecar)
.map_err(|error| format!("官方 hash sidecar 不是 UTF-8：{error}"))?
.trim()
.parse::<u32>()
.map_err(|error| format!("官方 hash sidecar 不是十进制 xxHash32：{error}"))?;
let actual = self.digest(data);
let mismatch = expected.to_string() != actual;
let verification = SidecarHashVerification {
expected: expected.to_string(),
actual,
};
if mismatch {
return Err(format!(
"官方 hash 校验失败：期望 {}，实际 {}",
verification.expected, verification.actual
));
}
Ok(verification)
}
}
/// Region/backend contract used by official resource orchestration.
pub trait OfficialResourceBackend: Send + Sync {
pub trait OfficialResourceBackend: InventoryParser + Send + Sync {
/// Stable backend identifier persisted in diagnostics.
fn backend_id(&self) -> &'static str;
@@ -40,13 +106,6 @@ pub trait OfficialResourceBackend: Send + Sync {
platforms: &[PatchPlatform],
) -> Result<YostarJpResourceDiscoveryPlan, String>;
/// Builds platform-aware inventory from the verified seed catalog bytes.
fn inventory(
&self,
table_catalog: &[u8],
platform_catalogs: &[PlatformCatalogInput<'_>],
) -> YostarJpPlatformDownloadInventory;
/// Validates that a URL belongs to this backend's official hosts.
fn is_official_url(&self, url: &str) -> bool;
}
@@ -61,6 +120,26 @@ pub trait DownloadUrlMapper: Send + Sync {
#[derive(Debug, Clone, Copy, Default)]
pub struct YostarJpBackend;
impl InventoryParser for YostarJpBackend {
fn parse_inventory(
&self,
table_catalog: &[u8],
platform_catalogs: &[PlatformCatalogInput<'_>],
) -> YostarJpPlatformDownloadInventory {
let catalogs = platform_catalogs
.iter()
.map(|catalog| {
YostarJpPlatformCatalogInventory::from_catalog_bytes(
catalog.platform,
catalog.bundle_packing_info,
catalog.media_catalog,
)
})
.collect();
YostarJpPlatformDownloadInventory::from_catalog_bytes(table_catalog, catalogs)
}
}
impl OfficialResourceBackend for YostarJpBackend {
fn backend_id(&self) -> &'static str {
"bluearchive.yostar.jp"
@@ -80,29 +159,77 @@ impl OfficialResourceBackend for YostarJpBackend {
server_info.discovery_plan(connection_group, app_version, platforms)
}
fn inventory(
&self,
table_catalog: &[u8],
platform_catalogs: &[PlatformCatalogInput<'_>],
) -> YostarJpPlatformDownloadInventory {
let catalogs = platform_catalogs
.iter()
.map(|catalog| {
YostarJpPlatformCatalogInventory::from_catalog_bytes(
catalog.platform,
catalog.bundle_packing_info,
catalog.media_catalog,
)
})
.collect();
YostarJpPlatformDownloadInventory::from_catalog_bytes(table_catalog, catalogs)
}
fn is_official_url(&self, url: &str) -> bool {
is_official_yostar_jp_url(url)
}
}
fn xxhash32(bytes: &[u8]) -> u32 {
const PRIME1: u32 = 0x9E37_79B1;
const PRIME2: u32 = 0x85EB_CA77;
const PRIME3: u32 = 0xC2B2_AE3D;
const PRIME4: u32 = 0x27D4_EB2F;
const PRIME5: u32 = 0x1656_67B1;
let len = bytes.len();
let mut index = 0usize;
let mut hash = if len >= 16 {
let mut v1 = PRIME1.wrapping_add(PRIME2);
let mut v2 = PRIME2;
let mut v3 = 0;
let mut v4 = 0u32.wrapping_sub(PRIME1);
while index + 16 <= len {
v1 = xxhash32_round(v1, read_u32_le(bytes, index));
v2 = xxhash32_round(v2, read_u32_le(bytes, index + 4));
v3 = xxhash32_round(v3, read_u32_le(bytes, index + 8));
v4 = xxhash32_round(v4, read_u32_le(bytes, index + 12));
index += 16;
}
v1.rotate_left(1)
.wrapping_add(v2.rotate_left(7))
.wrapping_add(v3.rotate_left(12))
.wrapping_add(v4.rotate_left(18))
} else {
PRIME5
}
.wrapping_add(len as u32);
while index + 4 <= len {
hash = hash
.wrapping_add(read_u32_le(bytes, index).wrapping_mul(PRIME3))
.rotate_left(17)
.wrapping_mul(PRIME4);
index += 4;
}
while index < len {
hash = hash
.wrapping_add((bytes[index] as u32).wrapping_mul(PRIME5))
.rotate_left(11)
.wrapping_mul(PRIME1);
index += 1;
}
hash ^= hash >> 15;
hash = hash.wrapping_mul(PRIME2);
hash ^= hash >> 13;
hash = hash.wrapping_mul(PRIME3);
hash ^ (hash >> 16)
}
fn xxhash32_round(acc: u32, input: u32) -> u32 {
acc.wrapping_add(input.wrapping_mul(0x85EB_CA77))
.rotate_left(13)
.wrapping_mul(0x9E37_79B1)
}
fn read_u32_le(bytes: &[u8], offset: usize) -> u32 {
u32::from_le_bytes([
bytes[offset],
bytes[offset + 1],
bytes[offset + 2],
bytes[offset + 3],
])
}
impl DownloadUrlMapper for YostarJpBackend {
fn relative_destination(&self, url: &str) -> Result<PathBuf, String> {
let rest = url
@@ -182,7 +309,7 @@ mod tests {
assert_eq!(backend.backend_id(), "bluearchive.yostar.jp");
assert!(backend.is_official_url(&plan.endpoints[0].url));
let inventory = backend.inventory(
let inventory = backend.parse_inventory(
b"ExcelDB.db ExcelDB.db",
&[PlatformCatalogInput {
platform: PatchPlatform::Windows,
@@ -194,6 +321,20 @@ mod tests {
assert_eq!(inventory.platform_catalogs.len(), 1);
}
#[test]
fn jp_hash_strategy_verifies_decimal_xxhash32_sidecars() {
let strategy = XxHash32DecimalSeedZero;
assert_eq!(strategy.algorithm_id(), "xxhash32_decimal");
assert_eq!(
strategy.verify(b"", b"46947589").unwrap(),
SidecarHashVerification {
expected: "46947589".to_string(),
actual: "46947589".to_string(),
}
);
assert!(strategy.verify(b"changed", b"46947589").is_err());
}
#[test]
fn jp_backend_maps_and_rejects_unsafe_destinations() {
let backend = YostarJpBackend;
adapters/src/official/mod.rs
+2 -1
View File
@@ -11,7 +11,8 @@ pub mod launcher;
pub mod yostar_jp;
pub use backend::{
destination_under_root, DownloadUrlMapper, OfficialResourceBackend, PlatformCatalogInput,
destination_under_root, DownloadUrlMapper, InventoryParser, OfficialResourceBackend,
PlatformCatalogInput, SidecarHashStrategy, SidecarHashVerification, XxHash32DecimalSeedZero,
YostarJpBackend,
};
pub use game_main_config::YostarJpGameMainConfig;
infrastructure/src/official_download.rs
+18 -93
View File
@@ -15,7 +15,8 @@ use crate::zip_validation::{
};
use bat_adapters::official::yostar_jp::YostarJpResourceEndpointKind;
use bat_adapters::official::{
destination_under_root, DownloadUrlMapper, OfficialResourceBackend, YostarJpBackend,
destination_under_root, DownloadUrlMapper, OfficialResourceBackend, SidecarHashStrategy,
XxHash32DecimalSeedZero, YostarJpBackend,
};
use serde::{Deserialize, Serialize};
use std::collections::{BTreeMap, HashSet};
@@ -1835,12 +1836,15 @@ pub fn verify_official_seed_catalog_hash(
hash_url: &str,
hash_bytes: &[u8],
) -> Result<OfficialResourceHashVerification, String> {
let expected = parse_official_xxhash32_decimal(hash_url, hash_bytes)?;
let actual = xxhash32(data);
let strategy = XxHash32DecimalSeedZero;
let verification = strategy
.verify(data, hash_bytes)
.map_err(|error| format!("{error}：{hash_url}"))?;
if actual != expected {
if verification.expected != verification.actual {
return Err(format!(
"官方 hash 校验失败 {data_url}：期望 {expected}（来自 {hash_url}），实际 {actual}"
"官方 hash 校验失败 {data_url}：期望 {}（来自 {hash_url}），实际 {}",
verification.expected, verification.actual
));
}
@@ -1848,8 +1852,8 @@ pub fn verify_official_seed_catalog_hash(
data_url: data_url.to_string(),
hash_url: hash_url.to_string(),
algorithm: OfficialResourceHashAlgorithm::XxHash32Decimal,
expected: expected.to_string(),
actual: actual.to_string(),
expected: verification.expected,
actual: verification.actual,
})
}
@@ -2209,92 +2213,6 @@ fn blake3_file_hex(path: &Path) -> Result<String, String> {
Ok(hasher.finalize().to_hex().to_string())
}
fn parse_official_xxhash32_decimal(hash_url: &str, bytes: &[u8]) -> Result<u32, String> {
let text = std::str::from_utf8(bytes)
.map_err(|error| format!("官方 hash sidecar 不是 UTF-8：{hash_url}：{error}"))?
.trim();
text.parse::<u32>()
.map_err(|error| format!("官方 hash sidecar 不是十进制 xxHash32：{hash_url}：{error}"))
}
fn xxhash32(bytes: &[u8]) -> u32 {
const PRIME1: u32 = 0x9E37_79B1;
const PRIME2: u32 = 0x85EB_CA77;
const PRIME3: u32 = 0xC2B2_AE3D;
const PRIME4: u32 = 0x27D4_EB2F;
const PRIME5: u32 = 0x1656_67B1;
let len = bytes.len();
let mut index = 0usize;
let mut hash = if len >= 16 {
let mut v1 = PRIME1.wrapping_add(PRIME2);
let mut v2 = PRIME2;
let mut v3 = 0;
let mut v4 = 0u32.wrapping_sub(PRIME1);
while index + 16 <= len {
v1 = xxhash32_round(v1, read_u32_le(bytes, index));
v2 = xxhash32_round(v2, read_u32_le(bytes, index + 4));
v3 = xxhash32_round(v3, read_u32_le(bytes, index + 8));
v4 = xxhash32_round(v4, read_u32_le(bytes, index + 12));
index += 16;
}
v1.rotate_left(1)
.wrapping_add(v2.rotate_left(7))
.wrapping_add(v3.rotate_left(12))
.wrapping_add(v4.rotate_left(18))
} else {
PRIME5
}
.wrapping_add(len as u32);
while index + 4 <= len {
hash = hash
.wrapping_add(read_u32_le(bytes, index).wrapping_mul(PRIME3))
.rotate_left(17)
.wrapping_mul(PRIME4);
index += 4;
}
while index < len {
hash = hash
.wrapping_add((bytes[index] as u32).wrapping_mul(PRIME5))
.rotate_left(11)
.wrapping_mul(PRIME1);
index += 1;
}
xxhash32_avalanche(hash)
}
fn xxhash32_round(acc: u32, input: u32) -> u32 {
const PRIME2: u32 = 0x85EB_CA77;
const PRIME1: u32 = 0x9E37_79B1;
acc.wrapping_add(input.wrapping_mul(PRIME2))
.rotate_left(13)
.wrapping_mul(PRIME1)
}
fn xxhash32_avalanche(mut hash: u32) -> u32 {
hash ^= hash >> 15;
hash = hash.wrapping_mul(0x85EB_CA77);
hash ^= hash >> 13;
hash = hash.wrapping_mul(0xC2B2_AE3D);
hash ^= hash >> 16;
hash
}
fn read_u32_le(bytes: &[u8], offset: usize) -> u32 {
u32::from_le_bytes([
bytes[offset],
bytes[offset + 1],
bytes[offset + 2],
bytes[offset + 3],
])
}
#[cfg(test)]
mod tests {
use super::*;
@@ -2311,6 +2229,13 @@ mod tests {
use std::fs;
use tempfile::TempDir;
fn xxhash32(bytes: &[u8]) -> u32 {
XxHash32DecimalSeedZero
.digest(bytes)
.parse()
.expect("xxHash32 decimal digest")
}
#[test]
fn fetch_bytes_maps_rejections_to_error_codes() {
// 非官方 URL：安全边界拒绝。
infrastructure/src/official_update.rs
+2 -2
View File
@@ -53,7 +53,7 @@ use bat_adapters::official::yostar_jp::{
YostarJpResourceEndpointKind, YostarJpServerInfo, YostarJpSyncSnapshot,
};
use bat_adapters::official::{
OfficialResourceBackend, PlatformCatalogInput, YostarJpBackend,
InventoryParser, OfficialResourceBackend, PlatformCatalogInput, YostarJpBackend,
YostarJpPlatformDownloadInventory,
};
use bat_core::ErrorCode;
@@ -4141,7 +4141,7 @@ fn build_inventory_from_seed_catalogs(
});
}
Ok(YostarJpBackend.inventory(table_catalog, &platform_catalogs))
Ok(YostarJpBackend.parse_inventory(table_catalog, &platform_catalogs))
}
#[derive(Debug, Default)]