c2pa-rs

commit 48df00c7ac5d81557c8f4c8bcc2a281555daf2ab
parent a9598cb1ae291324b2ba8bed77fbf79ed78e1d00
Author: Dave Kozma <dkozma@adobe.com>
Date:   Fri, 10 Mar 2023 10:05:12 -0500

Fix hash algo warning in Wasm and hashing for RSA-PSS SHA-384/512 (#206)


Diffstat:
M
sdk/src/wasm/webcrypto_validator.rs
 | 
5
++++-

1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/sdk/src/wasm/webcrypto_validator.rs b/sdk/src/wasm/webcrypto_validator.rs
@@ -154,7 +154,10 @@ async fn async_validate(
                 .map_err(|err| Error::WasmRsaKeyImport(err.to_string()))?;
             let (_, seq) = parse_ber_sequence(spki.subject_public_key)
                 .map_err(|err| Error::WasmRsaKeyImport(err.to_string()))?;
-            let hashed_data = hash_by_alg(&hash, &data, None);
+            // We need to normalize this from SHA-256 (the format WebCrypto uses) to sha256
+            // (the format the util function expects) so that it maps correctly
+            let normalized_hash = hash.clone().replace("-", "").to_lowercase();
+            let hashed_data = hash_by_alg(&normalized_hash, &data, None);
             let modulus = biguint_val(&seq[0]);
             let exp = biguint_val(&seq[1]);
             let public_key = RsaPublicKey::new(modulus, exp)