From 0c54fb0540591ab5ddcb4de2a2ff7fc54bd3b798 Mon Sep 17 00:00:00 2001
From: Kamen Mladenov <kamen@syndamia.com>
Date: Mon, 14 Apr 2025 13:33:22 +0300
Subject: feat(guests/sha256): Add SP1 and RISC0 precompile usage

---
 guests/sha256/Cargo.lock | 32 +++++++++++++++++++++++++++-----
 guests/sha256/Cargo.toml |  7 +++++--
 guests/sha256/src/lib.rs |  7 +++++++
 3 files changed, 39 insertions(+), 7 deletions(-)

diff --git a/guests/sha256/Cargo.lock b/guests/sha256/Cargo.lock
index b966cc1..e064cd9 100644
--- a/guests/sha256/Cargo.lock
+++ b/guests/sha256/Cargo.lock
@@ -146,23 +146,45 @@ dependencies = [
 
 [[package]]
 name = "sha2"
-version = "0.1.0"
+version = "0.10.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "793db75ad2bcafc3ffa7c68b215fee268f537982cd901d132f89c6343f3a3dc8"
 dependencies = [
- "guests_macro",
- "sha2 0.10.8",
+ "cfg-if",
+ "cpufeatures",
+ "digest",
 ]
 
 [[package]]
 name = "sha2"
 version = "0.10.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "793db75ad2bcafc3ffa7c68b215fee268f537982cd901d132f89c6343f3a3dc8"
+source = "git+https://github.com/sp1-patches/RustCrypto-hashes?tag=patch-sha2-0.10.8-sp1-4.0.0#1f224388fdede7cef649bce0d63876d1a9e3f515"
 dependencies = [
  "cfg-if",
  "cpufeatures",
  "digest",
 ]
 
+[[package]]
+name = "sha2"
+version = "0.10.8"
+source = "git+https://github.com/risc0/RustCrypto-hashes?tag=sha2-v0.10.8-risczero.0#244dc3b08788f7a4ccce14c66896ae3b4f24c166"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "digest",
+]
+
+[[package]]
+name = "sha256"
+version = "0.1.0"
+dependencies = [
+ "guests_macro",
+ "sha2 0.10.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "sha2 0.10.8 (git+https://github.com/sp1-patches/RustCrypto-hashes?tag=patch-sha2-0.10.8-sp1-4.0.0)",
+ "sha2 0.10.8 (git+https://github.com/risc0/RustCrypto-hashes?tag=sha2-v0.10.8-risczero.0)",
+]
+
 [[package]]
 name = "syn"
 version = "2.0.100"
diff --git a/guests/sha256/Cargo.toml b/guests/sha256/Cargo.toml
index fccbfa7..672d340 100644
--- a/guests/sha256/Cargo.toml
+++ b/guests/sha256/Cargo.toml
@@ -7,11 +7,14 @@ edition = "2021"
 guests_macro = { version = "0.1.0", path = "../../guests_macro" }
 sha2 = { version = "0.10.8", default-features = false }
 
+sha2-sp1 = { git = "https://github.com/sp1-patches/RustCrypto-hashes", package = "sha2", tag = "patch-sha2-0.10.8-sp1-4.0.0", optional = true }
+sha2-risc0 = { git = "https://github.com/risc0/RustCrypto-hashes", package = "sha2", tag = "sha2-v0.10.8-risczero.0", optional = true }
+
 [features]
 no_std = []
 jolt = []
 nexus = []
-risc0 = []
-sp1 = []
+risc0 = ["sha2-risc0"]
+sp1 = ["sha2-sp1"]
 zkm = []
 zkwasm = []
diff --git a/guests/sha256/src/lib.rs b/guests/sha256/src/lib.rs
index 1ca7f72..885f58a 100644
--- a/guests/sha256/src/lib.rs
+++ b/guests/sha256/src/lib.rs
@@ -5,6 +5,13 @@ extern crate alloc;
 #[cfg(feature = "no_std")]
 use alloc::vec::Vec;
 
+#[cfg(feature = "sp1")]
+use sha2_sp1::{Digest, Sha256};
+
+#[cfg(feature = "risc0")]
+use sha2_risc0::{Digest, Sha256};
+
+#[cfg(not(any(feature = "sp1", feature = "risc0")))]
 use sha2::{Digest, Sha256};
 
 #[guests_macro::proving_entrypoint]
-- 
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