Introduce RSAPrivateKey::SignDigest

crypto/signature_creator_nss.cc

Index: crypto/signature_creator_nss.cc
diff --git a/crypto/signature_creator_nss.cc b/crypto/signature_creator_nss.cc
index 3a30efba480a3be7f76cd5a2715add5aa85d937e..6c21efe25fef8eb710e7c5852dcd8835124b2b69 100644
--- a/crypto/signature_creator_nss.cc
+++ b/crypto/signature_creator_nss.cc
@@ -43,6 +43,29 @@ SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key) {
   return result.release();
 }
 
+// static
+bool SignatureCreator::Sign(RSAPrivateKey* key,
+                            const uint8* data,
+                            int data_len,
+                            std::vector<uint8>* signature) {
+  SECItem data_item;
+  data_item.type = siBuffer;
+  data_item.data = const_cast<unsigned char*>(data);
+  data_item.len = data_len;
+
+  SECItem signature_item;
+  SECStatus rv = SGN_Digest(key->key(), SEC_OID_SHA1, &signature_item,
+                            &data_item);
+  if (rv != SECSuccess) {
+    NOTREACHED();
+    return false;
+  }
+  signature->assign(signature_item.data,
+                    signature_item.data + signature_item.len);
+  SECITEM_FreeItem(&signature_item, PR_FALSE);
+  return true;
+}
+
 bool SignatureCreator::Update(const uint8* data_part, int data_part_len) {
   // TODO(wtc): Remove this const_cast when we require NSS 3.12.5.
   // See NSS bug https://bugzilla.mozilla.org/show_bug.cgi?id=518255