libuecc v7 (2016/03/27) * Change conversion between Ed25519 and legacy representation. This should not affect any operations unless Ed25519 and legacy load/store functions are mixed when accessing a work structure. Doing so is now officially supported, for example to convert a legacy public key to Ed25519 format. * The changed representation allows to use the same ecc_25519_work_default_base for both Ed25519 and legacy. ecc_25519_work_default_base and ecc_25519_scalarmult_base have been undeprecated, ecc_25519_work_base_ed25519 and ecc_25519_work_base_legacy are deprecated now. * All points are now internally represented with Ed25519 coordinates, which allows about 6% faster scalar multplication than the legacy representation. * ecc_25519_scalarmult_base has been further optimized, making it another 6% faster than normal ecc_25519_scalarmult. libuecc v6 (2015/10/25) * Fixes a bug which might have caused a point's y coordinate to be negated in certain circumstances when the point was stored in packed representation and loaded again. It is extremely improbable that this has ever actually happened, as only a small range of coordinates was affected. * Use stdint types to clarify ABI and add support for systems with sizeof(int) < 4 (this is not an ABI break in practise as all systems on which libuecc has been used in the past should have int == int32_t) * Add point negation and subtraction functions * Rename all point access functions to bear a _legacy suffix (the old names are still available, but marked as deprecated) * Add new point access functions and a new generator point that are compatible with Ed25519