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diff --git a/docs/v1.7.0-ReleaseNotes b/docs/v1.7.0-ReleaseNotes new file mode 100644 index 0000000..cd568c1 --- /dev/null +++ b/docs/v1.7.0-ReleaseNotes @@ -0,0 +1,81 @@ +Cryptsetup 1.7.0 Release Notes +============================== + +The cryptsetup 1.7 release changes defaults for LUKS, +there are no API changes. + +Changes since version 1.6.8 + +* Default hash function is now SHA256 (used in key derivation function + and anti-forensic splitter). + + Note that replacing SHA1 with SHA256 is not for security reasons. + (LUKS does not have problems even if collisions are found for SHA1, + for details see FAQ item 5.20). + + Using SHA256 as default is mainly to prevent compatibility problems + on hardened systems where SHA1 is already be phased out. + + Note that all checks (kernel crypto API availability check) now uses + SHA256 as well. + +* Default iteration time for PBKDF2 is now 2 seconds. + + Increasing iteration time is in combination with PBKDF2 benchmark + fixes a try to keep PBKDF2 iteration count still high enough and + also still acceptable for users. + + N.B. Long term is to replace PBKDF2 algorithm with Password Hashing + Competition winner - Argon2. + + Distributions can still change these defaults in compilation time. + + You can change iteration time and used hash function in existing LUKS + header with cryptsetup-reencrypt utility even without full reencryption + of device (see --keep-key option). + +* Fix PBKDF2 iteration benchmark for longer key sizes. + + The previous PBKDF2 benchmark code did not take into account + output key length properly. + + For SHA1 (with 160-bits output) and 256-bit keys (and longer) + it means that the final iteration value was higher than it should be. + + For other hash algorithms (like SHA256 or SHA512) it caused + that iteration count was lower (in comparison to SHA1) than + expected for the requested time period. + + The PBKDF2 benchmark code is now fixed to use the key size for + the formatted device (or default LUKS key size if running in informational + benchmark mode). + + Thanks to A.Visconti, S.Bossi, A.Calo and H.Ragab + (http://www.club.di.unimi.it/) for point this out. + (Based on "What users should know about Full Disk Encryption + based on LUKS" paper to be presented on CANS2015). + +* Remove experimental warning for reencrypt tool. + The strong request for full backup before using reencryption utility + still applies :) + +* Add optional libpasswdqc support for new LUKS passwords. + + If password is entered through terminal (no keyfile specified) and + cryptsetup is compiled with --enable-passwdqc[=/etc/passwdqc.conf], + configured system passwdqc settings are used to check password quality. + +* Update FAQ document. + +Cryptsetup API NOTE: + +Direct terminal handling and password calling callback for passphrase +entry will be removed from libcryptsetup in next major (2.x) version +(application should handle it itself). +It means that application have to always provide password in API calls. + +Functions returning last error will be removed in next major version (2.x). +These functions did not work properly for early initialization errors +and application can implement better function easily using own error callback. + +See comments in libcryptsetup.h for more info about deprecated functions. |