add crypto_kdf_* functions

this release adds crypto_kdf_* functions thanks to stsch9

security bugfix release

This release fixes security bugs, where the maximum message size was much bigger than is secure.

affected values were:

• crypto_secretstream_xchacha20poly1305_MESSAGEBYTES_MAX
• crypto_aead_aegis128l_MESSAGEBYTES_MAX
• crypto_aead_aegis256_MESSAGEBYTES_MAX

Support for AEGIS-128L, AEGIS-256 and crypto_kdf_hkdf_sha512

title says it all, except one thing: thanks @jedisct1 for this contribution!

Add support for crypto_kdf_hkdf_sha256* functions.

This release adds support to the crypto_kdf_hkdf_sha256* functions added in libsodium 1.0.19.

This release also fixes a bug in some keygen() functions which return the size (32) instead of 0|1 for success/fail, these were wrongly checked before. thanks to @stsch9 for their contribs!

adds HMAC functions

this release adds HMAC function thanks to Jonathan.

add crypto_stream_chacha20_ietf

no other changes than in title.

bugfix release

this omits testcases when installing the package, thanks to #105

sha512 consts added

added sha512 const functions

added crypto_stream_xchacha20_xor*

release on pypi with the new functions related to crypto_stream_xchacha20_xor

bugfix release

fixes some ristretto functions, which were checked for return codes, but did not in fact return only void.