diff options
| -rw-r--r-- | src/lib/pubkey/rsa/rsa.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/lib/pubkey/rsa/rsa.cpp b/src/lib/pubkey/rsa/rsa.cpp index 441127984..0cd8bbdf4 100644 --- a/src/lib/pubkey/rsa/rsa.cpp +++ b/src/lib/pubkey/rsa/rsa.cpp @@ -249,6 +249,13 @@ class RSA_Private_Operation #endif #if defined(BOTAN_RSA_USE_ASYNC) + /* + * Precompute m.sig_words in the main thread before calling async. Otherwise + * the two threads race (during Modular_Reducer::reduce) and while the output + * is correct in both threads, helgrind warns. + */ + m.sig_words(); + auto future_j1 = std::async(std::launch::async, [this, &m, &d1_mask, powm_window]() { #endif const BigInt masked_d1 = m_key.get_d1() + (d1_mask * (m_key.get_p() - 1)); |