diff --git a/Cargo.lock b/Cargo.lock
index a6c862731a..ffb81c5860 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -232,7 +232,6 @@ dependencies = [
  "hex",
  "nix 0.26.2",
  "once_cell",
- "sha2",
  "zerocopy",
 ]
 
diff --git a/builder/Cargo.toml b/builder/Cargo.toml
index e76960fb83..4c3468391d 100644
--- a/builder/Cargo.toml
+++ b/builder/Cargo.toml
@@ -20,7 +20,6 @@ hex.workspace = true
 nix.workspace = true
 once_cell.workspace = true
 zerocopy.workspace = true
-sha2.workspace = true
 
 [features]
 slow_tests = []
diff --git a/builder/src/lib.rs b/builder/src/lib.rs
index 5866422ca7..672755c873 100644
--- a/builder/src/lib.rs
+++ b/builder/src/lib.rs
@@ -422,7 +422,7 @@ pub fn elf2rom(elf_bytes: &[u8]) -> io::Result<Vec<u8>> {
         let rom_info_start = rom_info_sym.value as usize;
 
         let rom_info = RomInfo {
-            sha256_digest: sha256::sha256_word_reversed(&result[0..rom_info_start]),
+            sha256_digest: sha256::sha256_word_reversed(&result[0..rom_info_start])?,
             revision: image_revision()?,
             flags: 0,
             version: version::get_rom_version(),
diff --git a/builder/src/sha256.rs b/builder/src/sha256.rs
index 03cfecbce9..cedfbe615d 100644
--- a/builder/src/sha256.rs
+++ b/builder/src/sha256.rs
@@ -1,12 +1,18 @@
 // Licensed under the Apache-2.0 license
-use sha2::{Digest, Sha256};
+use caliptra_image_gen::ImageGeneratorCrypto;
+use caliptra_image_openssl::OsslCrypto;
+use std::io::{self, ErrorKind};
 
-pub fn sha256_word_reversed(bytes: &[u8]) -> [u32; 8] {
-    let mut sha = Sha256::new();
+pub fn sha256_word_reversed(bytes: &[u8]) -> io::Result<[u32; 8]> {
+    let crypto = OsslCrypto::default();
+
+    let mut reversed = Vec::<u8>::new();
     for i in 0..bytes.len() / 4 {
         let word = u32::from_le_bytes(bytes[i * 4..][..4].try_into().unwrap());
-        sha.update(word.swap_bytes().to_le_bytes());
+        reversed.extend_from_slice(&word.swap_bytes().to_le_bytes());
     }
-    let result_bytes = sha.finalize();
-    core::array::from_fn(|i| u32::from_be_bytes(result_bytes[i * 4..][..4].try_into().unwrap()))
+
+    crypto
+        .sha256_digest(&reversed)
+        .map_err(|e| io::Error::new(ErrorKind::Other, e))
 }
diff --git a/image/gen/src/lib.rs b/image/gen/src/lib.rs
index 1b72250c61..9fe0d80660 100644
--- a/image/gen/src/lib.rs
+++ b/image/gen/src/lib.rs
@@ -44,6 +44,9 @@ pub trait ImageGenratorExecutable {
 
 /// Image Gnerator Crypto Trait
 pub trait ImageGeneratorCrypto {
+    /// Calculate SHA-256 digest
+    fn sha256_digest(&self, data: &[u8]) -> anyhow::Result<[u32; SHA256_DIGEST_WORD_SIZE]>;
+
     /// Calculate SHA-384 digest
     fn sha384_digest(&self, data: &[u8]) -> anyhow::Result<ImageDigest>;
 
diff --git a/image/openssl/src/lib.rs b/image/openssl/src/lib.rs
index 1b39e1e1eb..c341591f0a 100644
--- a/image/openssl/src/lib.rs
+++ b/image/openssl/src/lib.rs
@@ -45,6 +45,12 @@ const D_LEAF: u16 = 0x8282;
 const D_INTR: u16 = 0x8383;
 
 impl ImageGeneratorCrypto for OsslCrypto {
+    fn sha256_digest(&self, data: &[u8]) -> anyhow::Result<[u32; SHA256_DIGEST_WORD_SIZE]> {
+        let mut engine = Sha256::new();
+        engine.update(data);
+        Ok(to_hw_format(&engine.finish()))
+    }
+
     /// Calculate SHA-384 Digest
     fn sha384_digest(&self, data: &[u8]) -> anyhow::Result<ImageDigest> {
         let mut engine = Sha384::new();
@@ -157,11 +163,10 @@ pub fn lms_priv_key_from_pem(path: &PathBuf) -> anyhow::Result<ImageLmsPrivKey>
 }
 
 /// Convert the slice to hardware format
-fn to_hw_format(value: &[u8]) -> [u32; ECC384_SCALAR_WORD_SIZE] {
-    let arr = TryInto::<[u8; ECC384_SCALAR_BYTE_SIZE]>::try_into(value).unwrap();
-    let mut result = [0u32; ECC384_SCALAR_WORD_SIZE];
+fn to_hw_format<const NUM_WORDS: usize>(value: &[u8]) -> [u32; NUM_WORDS] {
+    let mut result = [0u32; NUM_WORDS];
     for i in 0..result.len() {
-        result[i] = u32::from_be_bytes(arr[i * 4..][..4].try_into().unwrap())
+        result[i] = u32::from_be_bytes(value[i * 4..][..4].try_into().unwrap())
     }
     result
 }
diff --git a/image/types/src/lib.rs b/image/types/src/lib.rs
index 5887d5f9ad..35279d2c8e 100644
--- a/image/types/src/lib.rs
+++ b/image/types/src/lib.rs
@@ -34,6 +34,7 @@ pub const ECC384_SCALAR_WORD_SIZE: usize = 12;
 pub const ECC384_SCALAR_BYTE_SIZE: usize = 48;
 pub const SHA192_DIGEST_BYTE_SIZE: usize = 24;
 pub const SHA192_DIGEST_WORD_SIZE: usize = 6;
+pub const SHA256_DIGEST_WORD_SIZE: usize = 8;
 pub const SHA384_DIGEST_WORD_SIZE: usize = 12;
 pub const SHA384_DIGEST_BYTE_SIZE: usize = 48;
 pub const IMAGE_LMS_OTS_P_PARAM: usize = 51;