Smooth migration from legacy to current hash generating strategy.

Since the existing DefaultSecureHashCodeGeneratorStrategy used for securing blob transformation was considered vulnerable to possible DoS attacks, a new default MD5SecureHashCodeGeneratorStrategy was introduced with version 10.2007.

The new MD5SecureHashCodeGeneratorStrategy wont match hashes created by the former DefaultSecureHashCodeGeneratorStrategy . Cached URLs would cause a HTTP 403 (forbidden) status code. Therefore CoreMedia now provides a smooth migration path by using a strategy which will accept hashes created by both, the DefaultSecureHashCodeGeneratorStrategy and the MD5SecureHashCodeGeneratorStrategy . New hashes will be created using the new MD5SecureHashCodeGeneratorStrategy .

The migration mode can be enabled by setting cae.hashing.migration-mode=true .

(CMS-18868)