refactor(algc): understand digest memory layout better

crates/algorithms/algorithms-c/src/hash/hash.c

@@ -1,2 +1,10 @@
 
 #include "hash.h"
+#include <stdio.h>
+
+void print_digest(const SHA2Digest digest) {
+  for (size_t i = 0; i < SHA2_256_HashParts; i++) {
+    fprintf(stderr, "%08x", digest[i]);
+  }
+  fprintf(stderr, "\n");
+}

crates/algorithms/algorithms-c/src/hash/hash.h

@@ -3,4 +3,6 @@
 
 #include "sha2.h"
 
+extern void print_digest(const SHA2Digest);
+
 #endif // HASH_H

crates/algorithms/algorithms-c/test/hash/test_sha2.c

@@ -1,3 +1,4 @@
+#include "hash.h"
 #include "sha2.h"
 #include "trace.h"
 #include "unity.h"
@@ -44,11 +45,12 @@ void test_sha2_check(void) {
     // NOTE: If it segfaults here, then the sha2_oneshot function is at fault
     // anyways!!!!!!!!!!!!
     TRACELN("Hash should be:");
-    dump_data(test_values[i][1], SHA2_256_HashBytes);
+    print_digest(test_values[i][1]); // idk how to fix this warning
 
     TRACELN("Hash is:");
-    dump_data((uint8_t *)digest, SHA2_256_HashBytes);
+    print_digest(digest);
 
-    TEST_ASSERT_EQUAL_MEMORY(test_values[i][1], digest, SHA2_256_HashBytes);
+    TEST_ASSERT_EQUAL_HEX32_ARRAY(test_values[i][1], digest,
+                                  SHA2_256_HashParts);
   }
 }

crates/algorithms/src/bin/sha256sum.rs

@@ -14,11 +14,7 @@ fn main() {
     } else {
         algorithms::hash::sha2_256_oneshot(raw_in).expect("could not hash your input data")
     };
-    println!("{}", format_digest(&bytes(&hash)));
-}
-
-fn bytes(data: &[u32]) -> Vec<u8> {
-    data.iter().flat_map(|x| x.to_ne_bytes()).collect()
+    println!("{}", format_digest(&hash));
 }
 
 fn usage(call: &str, code: i32) -> ! {

crates/algorithms/src/hash/mod.rs

@@ -6,10 +6,10 @@ pub use sha2::*;
 pub const HASH_EXAMPLE_DATA: &[u8] = b"lalilolela";
 
 #[cfg(feature = "std")]
-pub fn format_digest(digest: &[u8]) -> String {
+pub fn format_digest(digest: &[u32]) -> String {
     digest
         .iter()
-        .map(|b| format!("{b:02x}"))
+        .map(|b| format!("{b:08x}"))
         .collect::<String>()
 }