Rename Integrity_Failure to Invalid_Authentication_Tag

This makes the meaning and usage more clear.

Add a specific error type so invalid tags can be distinguished without
having to catch that specific type.

See also #1813

1 files changed, 2 insertions, 4 deletions

diff --git a/src/lib/pubkey/xmss/xmss_privatekey.h b/src/lib/pubkey/xmss/xmss_privatekey.h
index d66933724..e3b41617c 100644
--- a/src/lib/pubkey/xmss/xmss_privatekey.h
+++ b/src/lib/pubkey/xmss/xmss_privatekey.h
@@ -115,8 +115,7 @@ class BOTAN_PUBLIC_API(2,0) XMSS_PrivateKey final : public virtual XMSS_PublicKe
          {
          if(idx >= (1ull << XMSS_PublicKey::m_xmss_params.tree_height()))
             {
-            throw Integrity_Failure("XMSS private key leaf index out of "
-                                    "bounds.");
+            throw Decoding_Error("XMSS private key leaf index out of bounds");
             }
          else
             {
@@ -140,8 +139,7 @@ class BOTAN_PUBLIC_API(2,0) XMSS_PrivateKey final : public virtual XMSS_PublicKe
                           *recover_global_leaf_index())).fetch_add(1);
          if(idx >= (1ull << XMSS_PublicKey::m_xmss_params.tree_height()))
             {
-            throw Integrity_Failure("XMSS private key, one time signatures "
-                                    "exhausted.");
+            throw Decoding_Error("XMSS private key, one time signatures exhaused");
             }
          return idx;
          }