Research: Make the library multiplatform

[osipxd]

Since DataStore became multiplatform library in 1.1.0, it would be great to have multiplatform solution for its encryption.

Current JVM dependencies of my library are:

• security-crypto — might be dropped because of Security crypto deprecation #31
• Tink — has implementations in C++ (Native), Obj-C (Native/iOS) and Go (Wasm). TypeScript implementation is not going to be released anytime and Google recommends to use WebCrypto API instead, however it might be more reasonable to use Wasm module from JS.
• JVM Input/Output streams — could be replaced by kotlinx-io or Okio

References

• Wasm target:
  • In-browser HSM-backed Encryption with Tink and Wasm
  • Go wiki: WebAssembly
• KMM bindings for Tink (outdated, iOS/Android only)

[osipxd]

The preparation step is done:

• Migrate encrypted-datastore modules to KMP plugin #77