Migrate to rsa 0.6 and pre-release of chacha20poly1305

This brings us onto Rust Crypto crates with MSRV 1.56 or lower.

Author: str4d

Cargo.lock

@@ -21,7 +21,7 @@ maintenance = { status = "experimental" }
 base64 = "0.13"
 
 # - ChaCha20-Poly1305 from RFC 7539
-chacha20poly1305 = { version = "0.9", default-features = false, features = ["alloc"] }
+chacha20poly1305 = { version = "0.10.0-pre", default-features = false, features = ["alloc"] }
 
 # - HKDF from RFC 5869 with SHA-256
 hkdf = "0.12"

age-core/Cargo.toml

@@ -21,7 +21,7 @@ age-core = { version = "0.7.1", path = "../age-core" }
 base64 = "0.13"
 
 # - ChaCha20-Poly1305 from RFC 7539
-chacha20poly1305 = { version = "0.9", default-features = false, features = ["alloc"] }
+chacha20poly1305 = { version = "0.10.0-pre", default-features = false, features = ["alloc"] }
 
 # - X25519 from RFC 7748
 x25519-dalek = "1"
@@ -45,8 +45,7 @@ bech32 = "0.8"
 # OpenSSH-specific dependencies:
 # - RSAES-OAEP from RFC 8017 with SHA-256 and MGF1
 num-traits = { version = "0.2", optional = true }
-rsa = { version = "0.5", optional = true }
-sha2_09 = { package = "sha2", version = "0.9" }
+rsa = { version = "0.6", optional = true }
 
 # - Conversion of public keys from Ed25519 to X25519
 curve25519-dalek = { version = "3", optional = true }

age/Cargo.toml

@@ -14,7 +14,7 @@ use nom::{
 };
 use rand::rngs::OsRng;
 use rsa::padding::PaddingScheme;
-use sha2_09::{Digest, Sha256, Sha512};
+use sha2::{Digest, Sha256, Sha512};
 use std::fmt;
 use std::io;
 use x25519_dalek::{PublicKey as X25519PublicKey, StaticSecret};