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author | Eric Biggers <ebiggers@google.com> | 2021-04-23 22:04:01 +0000 |
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committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | 2021-04-23 22:04:01 +0000 |
commit | a8286c79bad5abe4e196445ba0fd367f658c36fc (patch) | |
tree | e2e393cd7adb04f018f30c8a34836270d7421276 | |
parent | 190dc59dc5f125f96eb2261d14e5b7b6f138f70b (diff) | |
parent | 23714ed84501f0b908d036bb428ff1406dbbe29d (diff) | |
download | ahash-android12-mainline-statsd-release.tar.gz |
Use /dev/urandom instead of getrandom() am: 7e6b92bc9c am: 36d78ff4a4 am: 13bc4fb605 am: 23714ed845android-mainline-12.0.0_r99android-mainline-12.0.0_r98android-mainline-12.0.0_r97android-mainline-12.0.0_r96android-mainline-12.0.0_r95android-mainline-12.0.0_r94android-mainline-12.0.0_r93android-mainline-12.0.0_r92android-mainline-12.0.0_r91android-mainline-12.0.0_r90android-mainline-12.0.0_r9android-mainline-12.0.0_r89android-mainline-12.0.0_r88android-mainline-12.0.0_r87android-mainline-12.0.0_r86android-mainline-12.0.0_r85android-mainline-12.0.0_r84android-mainline-12.0.0_r83android-mainline-12.0.0_r82android-mainline-12.0.0_r81android-mainline-12.0.0_r80android-mainline-12.0.0_r8android-mainline-12.0.0_r79android-mainline-12.0.0_r78android-mainline-12.0.0_r77android-mainline-12.0.0_r76android-mainline-12.0.0_r75android-mainline-12.0.0_r74android-mainline-12.0.0_r73android-mainline-12.0.0_r72android-mainline-12.0.0_r71android-mainline-12.0.0_r70android-mainline-12.0.0_r7android-mainline-12.0.0_r69android-mainline-12.0.0_r68android-mainline-12.0.0_r67android-mainline-12.0.0_r66android-mainline-12.0.0_r65android-mainline-12.0.0_r64android-mainline-12.0.0_r63android-mainline-12.0.0_r62android-mainline-12.0.0_r61android-mainline-12.0.0_r60android-mainline-12.0.0_r6android-mainline-12.0.0_r59android-mainline-12.0.0_r58android-mainline-12.0.0_r57android-mainline-12.0.0_r56android-mainline-12.0.0_r53android-mainline-12.0.0_r52android-mainline-12.0.0_r51android-mainline-12.0.0_r50android-mainline-12.0.0_r5android-mainline-12.0.0_r49android-mainline-12.0.0_r48android-mainline-12.0.0_r47android-mainline-12.0.0_r46android-mainline-12.0.0_r45android-mainline-12.0.0_r44android-mainline-12.0.0_r43android-mainline-12.0.0_r42android-mainline-12.0.0_r41android-mainline-12.0.0_r40android-mainline-12.0.0_r39android-mainline-12.0.0_r38android-mainline-12.0.0_r37android-mainline-12.0.0_r35android-mainline-12.0.0_r34android-mainline-12.0.0_r33android-mainline-12.0.0_r32android-mainline-12.0.0_r31android-mainline-12.0.0_r30android-mainline-12.0.0_r3android-mainline-12.0.0_r29android-mainline-12.0.0_r28android-mainline-12.0.0_r27android-mainline-12.0.0_r26android-mainline-12.0.0_r25android-mainline-12.0.0_r24android-mainline-12.0.0_r23android-mainline-12.0.0_r22android-mainline-12.0.0_r21android-mainline-12.0.0_r20android-mainline-12.0.0_r2android-mainline-12.0.0_r19android-mainline-12.0.0_r18android-mainline-12.0.0_r17android-mainline-12.0.0_r16android-mainline-12.0.0_r15android-mainline-12.0.0_r14android-mainline-12.0.0_r13android-mainline-12.0.0_r126android-mainline-12.0.0_r125android-mainline-12.0.0_r124android-mainline-12.0.0_r123android-mainline-12.0.0_r122android-mainline-12.0.0_r121android-mainline-12.0.0_r120android-mainline-12.0.0_r12android-mainline-12.0.0_r119android-mainline-12.0.0_r118android-mainline-12.0.0_r117android-mainline-12.0.0_r116android-mainline-12.0.0_r115android-mainline-12.0.0_r114android-mainline-12.0.0_r113android-mainline-12.0.0_r110android-mainline-12.0.0_r11android-mainline-12.0.0_r109android-mainline-12.0.0_r108android-mainline-12.0.0_r107android-mainline-12.0.0_r106android-mainline-12.0.0_r105android-mainline-12.0.0_r104android-mainline-12.0.0_r103android-mainline-12.0.0_r102android-mainline-12.0.0_r101android-mainline-12.0.0_r100android-mainline-12.0.0_r10android-mainline-12.0.0_r1aml_wif_311811030aml_tz3_311312010aml_tet_311811050aml_sdk_311710000aml_pco_311011000aml_mpr_311911090aml_doc_310851020android12-mainline-wifi-releaseandroid12-mainline-tethering-releaseandroid12-mainline-statsd-releaseandroid12-mainline-sdkext-releaseandroid12-mainline-resolv-releaseandroid12-mainline-permission-releaseandroid12-mainline-neuralnetworks-releaseandroid12-mainline-networkstack-releaseandroid12-mainline-mediaprovider-releaseandroid12-mainline-media-swcodec-releaseandroid12-mainline-media-releaseandroid12-mainline-ipsec-releaseandroid12-mainline-extservices-releaseandroid12-mainline-documentsui-releaseandroid12-mainline-conscrypt-releaseandroid12-mainline-cellbroadcast-releaseandroid12-mainline-captiveportallogin-releaseandroid12-mainline-art-releaseandroid12-mainline-adbd-release
Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/ahash/+/1683025
Change-Id: I5c747df98585a54a739689aa9562bf5b3b4beae3
-rw-r--r-- | patches/0001-Use-dev-urandom-instead-of-getrandom.patch | 49 | ||||
-rw-r--r-- | src/random_state.rs | 13 |
2 files changed, 61 insertions, 1 deletions
diff --git a/patches/0001-Use-dev-urandom-instead-of-getrandom.patch b/patches/0001-Use-dev-urandom-instead-of-getrandom.patch new file mode 100644 index 0000000..d5adff0 --- /dev/null +++ b/patches/0001-Use-dev-urandom-instead-of-getrandom.patch @@ -0,0 +1,49 @@ +From 5bce943cdb8fc81525257413f174844d644d63c8 Mon Sep 17 00:00:00 2001 +From: Eric Biggers <ebiggers@google.com> +Date: Tue, 20 Apr 2021 16:48:07 -0700 +Subject: [PATCH] Use /dev/urandom instead of getrandom() + +To generate the ahash crate's default hash keys, use /dev/urandom +instead of getrandom() to avoid blocking boot on systems where the +entropy pool isn't initialized in time and where the use case of this +crate doesn't actually require cryptographic randomness. + +If opening or reading from /dev/urandom fails, fall back to getrandom(). + +Note that std::collections::HashMap doesn't block for randomness either, +for the same reason. So this change just makes ahash work like HashMap. + +Bug: 185934601 +Change-Id: Ie81a1f3a893d578348db11aee114d1a8f2d9fac5 +--- +diff --git a/src/random_state.rs b/src/random_state.rs +index 501e3eb..9b3b3d0 100644 +--- a/src/random_state.rs ++++ b/src/random_state.rs +@@ -10,11 +10,22 @@ use core::hash::Hasher; + use lazy_static::*; + use core::sync::atomic::{AtomicUsize, Ordering}; + ++#[cfg(all(feature = "runtime-rng", not(all(feature = "compile-time-rng", test))))] ++fn read_urandom(dest: &mut [u8]) -> Result<(), std::io::Error> { ++ use std::fs::File; ++ use std::io::Read; ++ ++ let mut f = File::open("/dev/urandom")?; ++ f.read_exact(dest) ++} ++ + #[cfg(all(feature = "runtime-rng", not(all(feature = "compile-time-rng", test))))] + lazy_static! { + static ref SEEDS: [[u64; 4]; 2] = { + let mut result: [u8; 64] = [0; 64]; +- getrandom::getrandom(&mut result).expect("getrandom::getrandom() failed."); ++ if read_urandom(&mut result).is_err() { ++ getrandom::getrandom(&mut result).expect("getrandom::getrandom() failed.") ++ } + result.convert() + }; + } +-- +2.31.1.498.g6c1eba8ee3d-goog + diff --git a/src/random_state.rs b/src/random_state.rs index 501e3eb..9b3b3d0 100644 --- a/src/random_state.rs +++ b/src/random_state.rs @@ -11,10 +11,21 @@ use lazy_static::*; use core::sync::atomic::{AtomicUsize, Ordering}; #[cfg(all(feature = "runtime-rng", not(all(feature = "compile-time-rng", test))))] +fn read_urandom(dest: &mut [u8]) -> Result<(), std::io::Error> { + use std::fs::File; + use std::io::Read; + + let mut f = File::open("/dev/urandom")?; + f.read_exact(dest) +} + +#[cfg(all(feature = "runtime-rng", not(all(feature = "compile-time-rng", test))))] lazy_static! { static ref SEEDS: [[u64; 4]; 2] = { let mut result: [u8; 64] = [0; 64]; - getrandom::getrandom(&mut result).expect("getrandom::getrandom() failed."); + if read_urandom(&mut result).is_err() { + getrandom::getrandom(&mut result).expect("getrandom::getrandom() failed.") + } result.convert() }; } |