Simple HKDF utility with Objective-C interface
RFC5869-compliant key derivation function.
NSData *derivedData = [HKDFKit deriveKey:aSeed info:anInfo salt:aSalt outputSize:anOutputSize];TextSecure v2 protocol uses different bounds for the HKDF function.
NSData *derivedData = [TextSecureV2deriveKey:aSeed info:anInfo salt:aSalt outputSize:anOutputSize];API reference is available on CocoaDocs.
Add this line to your Podfile
pod 'HKDFKit', '~> version number'
Licensed under the GPLv3: http://www.gnu.org/licenses/gpl-3.0.html