[SOLVED] Upgrading argon2 from 0.5 to 0.5.3 gives error no `OsRng` in the root

Upgrading argon2 from 0.5 to 0.5.3 gives error no `OsRng` in the root

In my Cargo.toml, want to upgrade argon2-rs from 0.5 to 0.5.3, but I get an error that I can't seem to solve myself:

use argon2::password_hash::rand_core::OsRng;
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `OsRng` in the root

When I follow the compiler hint to use rand::rngs::OsRng; instead, then I can't generate password hashes with my existing code:

let salt = SaltString::generate(&mut OsRng);
           --------------------      ^^^^^ the trait `argon2::password_hash::rand_core::CryptoRng` is not implemented for `rand::rngs::OsRng`

note: there are multiple different versions of crate `rand_core` in the dependency graph

In my code I already use rand 0.9 which is the same version as other crates like postgres-rs. But only one crate chrono-tz 0.10.1 is still using rand 0.8.5.

Currently I can only revert back to rand 0.8.

How can I upgrade to rand 0.9 ?

Solution

The trait argon2::password_hash::rand_core::CryptoRng is not implemented for rand::rngs::OsRng

A solution would be to utilize other functions to achieve the same thing:

let mut bytes = [0u8; Salt::RECOMMENDED_LENGTH];
OsRng.try_fill_bytes(&mut bytes).unwrap();
let salt = SaltString::encode_b64(&bytes).unwrap();