tdf#114939 officecfg,sfx2: always use AES/SHA256 in ODF 1.2

The setting ODFVER_012_EXT_COMPAT "1.2 Extended (compatibility mode)"
no longer has an effect on the encryption algorithms.

API CHANGE: Remove the configuration settings:
Office.Common.Save.ODF.UseSHA1InODF12
Office.Common.Save.ODF.UseBlowfishInODF12

Rationale:
* Every release since 2012, from LO >= 3.4 and AOO >= 3.4,
  can read AES/SHA256 encrypted files.
* SHA1 is broken anyway
* tdf#114939 causes SHA1 interop issues

Retain SHA1/Blowfish only for ODF 1.1 export.

Change-Id: I007511d4830a90121e38bf5bb4534df5695621e9

officecfg/registry/schema/org/openoffice/Office/Common.xcs

@@ -2409,21 +2409,6 @@
           </constraints>
           <value>3</value>
         </prop>
-        <prop oor:name="UseSHA1InODF12" oor:type="xs:boolean" oor:nillable="false">
-          <info>
-            <desc>Specifies whether SHA1 algorithm instead of SHA256 should be
-            used in ODF12 for StartKey and Checksum generation during
-            encryption.</desc>
-          </info>
-          <value>false</value>
-        </prop>
-        <prop oor:name="UseBlowfishInODF12" oor:type="xs:boolean" oor:nillable="false">
-          <info>
-            <desc>Specifies whether Blowfish algorithm instead of AES should be
-            used in ODF12 for encryption.</desc>
-          </info>
-          <value>false</value>
-        </prop>
       </group>
     </group>
     <group oor:name="Load">

sfx2/source/doc/objstor.cxx

@@ -362,15 +362,10 @@ void SfxObjectShell::SetupStorage( const uno::Reference< embed::XStorage >& xSto
                 }
 
                 SvtSaveOptions::ODFDefaultVersion nDefVersion = SvtSaveOptions::ODFVER_012;
-                bool bUseSHA1InODF12 = false;
-                bool bUseBlowfishInODF12 = false;
-
                 if (!utl::ConfigManager::IsFuzzing())
                 {
                     SvtSaveOptions aSaveOpt;
                     nDefVersion = aSaveOpt.GetODFDefaultVersion();
-                    bUseSHA1InODF12 = officecfg::Office::Common::Save::ODF::UseSHA1InODF12::get();
-                    bUseBlowfishInODF12 = officecfg::Office::Common::Save::ODF::UseBlowfishInODF12::get();
                 }
 
                 // the default values, that should be used for ODF1.1 and older formats
@@ -392,13 +387,9 @@ void SfxObjectShell::SetupStorage( const uno::Reference< embed::XStorage >& xSto
                     {
                     }
 
-                    if ( !bUseSHA1InODF12 && nDefVersion != SvtSaveOptions::ODFVER_012_EXT_COMPAT )
-                    {
-                        aEncryptionAlgs[0].Value <<= xml::crypto::DigestID::SHA256;
-                        aEncryptionAlgs[2].Value <<= xml::crypto::DigestID::SHA256_1K;
-                    }
-                    if ( !bUseBlowfishInODF12 && nDefVersion != SvtSaveOptions::ODFVER_012_EXT_COMPAT )
-                        aEncryptionAlgs[1].Value <<= xml::crypto::CipherID::AES_CBC_W3C_PADDING;
+                    aEncryptionAlgs[0].Value <<= xml::crypto::DigestID::SHA256;
+                    aEncryptionAlgs[2].Value <<= xml::crypto::DigestID::SHA256_1K;
+                    aEncryptionAlgs[1].Value <<= xml::crypto::CipherID::AES_CBC_W3C_PADDING;
                 }
 
                 try