PKCS #1 v1.5 signature padding aka PKCS #1 block type 1 aka EMSA3 from IEEE 1363
EMSA_PKCS1v15_Raw which is EMSA_PKCS1v15 without a hash or digest id (which according to QCA docs is "identical to PKCS#11's CKM_RSA_PKCS mechanism", something I have not confirmed)
Botan is released under the Simplified BSD License (see LICENSE.md)
(C) 1999-2008 Jack Lloyd (C) 2014-2015 Etienne Cimon
PKCS #1 v1.5 signature padding