Add Keccak256 syscall and sdk support (#16498)

programs/bpf/rust/sha/src/lib.rs

@@ -0,0 +1,43 @@
+//! @brief SHA Syscall test
+
+extern crate solana_program;
+use solana_program::{custom_panic_default, msg};
+
+fn test_sha256_hasher() {
+    use solana_program::hash::{hashv, Hasher};
+    let vals = &["Gaggablaghblagh!".as_ref(), "flurbos".as_ref()];
+    let mut hasher = Hasher::default();
+    hasher.hashv(vals);
+    assert_eq!(hashv(vals), hasher.result());
+}
+
+fn test_keccak256_hasher() {
+    use solana_program::keccak::{hashv, Hasher};
+    let vals = &["Gaggablaghblagh!".as_ref(), "flurbos".as_ref()];
+    let mut hasher = Hasher::default();
+    hasher.hashv(vals);
+    assert_eq!(hashv(vals), hasher.result());
+}
+
+#[no_mangle]
+pub extern "C" fn entrypoint(_input: *mut u8) -> u64 {
+    msg!("sha");
+
+    test_sha256_hasher();
+    test_keccak256_hasher();
+
+    0
+}
+
+custom_panic_default!();
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn test_sha() {
+        test_sha256_hasher();
+        test_keccak256_hasher();
+    }
+}