(async-)signature: MSRV 1.60

To simplify the workspace, which contains weak/namespaced features, this
bumps both `async-signature` and `signature` to MSRV 1.60.

So as for the bump to have some justification, it adds weak feature
activation for `rand_core?/std`, and uses this impl to write a
`From<rand_core::Error>` conversion which can preserve the original
error as the boxed source.

.github/workflows/async-signature.yml

@@ -22,7 +22,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.56.0 # MSRV
+          - 1.60.0 # MSRV
           - stable
     steps:
       - uses: actions/checkout@v4

.github/workflows/signature.yml

@@ -23,7 +23,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.56.0 # MSRV
+          - 1.60.0 # MSRV
           - stable
         target:
           - thumbv7em-none-eabi
@@ -51,7 +51,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.56.0 # MSRV
+          - 1.60.0 # MSRV
           - stable
     steps:
       - uses: actions/checkout@v4
@@ -69,7 +69,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.56.0 # MSRV
+          - 1.60.0 # MSRV
           - stable
     steps:
       - uses: actions/checkout@v4

Cargo.toml

@@ -9,11 +9,11 @@ members = [
     "elliptic-curve",
     "kem",
     "password-hash",
+    "signature",
+    "signature/async",
 ]
 # TODO: re-add to `members` when MSRV has been bumped to 1.60+
 exclude = [
-    "signature",
-    "signature/async",
     "universal-hash",
 ]
 

signature/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name          = "signature"
 description   = "Traits for cryptographic signature algorithms (e.g. ECDSA, Ed25519)"
-version       = "2.1.0"
+version       = "2.2.0-pre"
 authors       = ["RustCrypto Developers"]
 license       = "Apache-2.0 OR MIT"
 documentation = "https://docs.rs/signature"
@@ -10,7 +10,7 @@ readme        = "README.md"
 keywords      = ["crypto", "ecdsa", "ed25519", "signature", "signing"]
 categories    = ["cryptography", "no-std"]
 edition       = "2021"
-rust-version  = "1.56"
+rust-version  = "1.60"
 
 [dependencies]
 derive = { package = "signature_derive", version = "2", optional = true, path = "derive" }
@@ -23,7 +23,7 @@ sha2 = { version = "0.10", default-features = false }
 
 [features]
 alloc = []
-std = ["alloc"]
+std = ["alloc", "rand_core?/std"]
 
 [package.metadata.docs.rs]
 all-features = true

signature/README.md

@@ -17,7 +17,7 @@ the [RustCrypto] organization, as well as [`ed25519-dalek`].
 
 ## Minimum Supported Rust Version
 
-Rust **1.56** or higher.
+Rust **1.65** or higher.
 
 Minimum supported Rust version can be changed in the future, but it will be
 done with a minor version bump.
@@ -56,7 +56,7 @@ dual licensed as above, without any additional terms or conditions.
 [build-image]: https://github.com/RustCrypto/traits/actions/workflows/signature.yml/badge.svg
 [build-link]: https://github.com/RustCrypto/traits/actions/workflows/signature.yml
 [license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg
-[rustc-image]: https://img.shields.io/badge/rustc-1.56+-blue.svg
+[rustc-image]: https://img.shields.io/badge/rustc-1.65+-blue.svg
 [chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg
 [chat-link]: https://rustcrypto.zulipchat.com/#narrow/stream/260048-signatures
 

signature/async/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name          = "async-signature"
 description   = "Traits for cryptographic signature algorithms (e.g. ECDSA, Ed25519)"
-version       = "0.3.0"
+version       = "0.4.0-pre"
 authors       = ["RustCrypto Developers"]
 license       = "Apache-2.0 OR MIT"
 documentation = "https://docs.rs/async-signature"
@@ -10,11 +10,11 @@ readme        = "README.md"
 keywords      = ["crypto", "ecdsa", "ed25519", "signature", "signing"]
 categories    = ["cryptography", "no-std"]
 edition       = "2021"
-rust-version  = "1.56"
+rust-version  = "1.60"
 
 [dependencies]
 async-trait = "0.1.9"
-signature = { version = "2.0, <2.2", path = ".." }
+signature = { version = "=2.2.0-pre", path = ".." }
 
 [features]
 digest = ["signature/digest"]

signature/async/README.md

@@ -9,7 +9,7 @@
 
 ## Minimum Supported Rust Version
 
-Rust **1.56** or higher.
+Rust **1.60** or higher.
 
 Minimum supported Rust version can be changed in the future, but it will be
 done with a minor version bump.
@@ -36,7 +36,7 @@ dual licensed as above, without any additional terms or conditions.
 [docs-image]: https://docs.rs/async-signature/badge.svg
 [docs-link]: https://docs.rs/async-signature/
 [license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg
-[rustc-image]: https://img.shields.io/badge/rustc-1.56+-blue.svg
+[rustc-image]: https://img.shields.io/badge/rustc-1.60+-blue.svg
 [chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg
 [chat-link]: https://rustcrypto.zulipchat.com/#narrow/stream/260048-signatures
 [build-image]: https://github.com/RustCrypto/traits/workflows/async-signature/badge.svg?branch=master&event=push

signature/src/error.rs

@@ -93,6 +93,19 @@ impl From<Box<dyn std::error::Error + Send + Sync + 'static>> for Error {
     }
 }
 
+#[cfg(feature = "rand_core")]
+impl From<rand_core::Error> for Error {
+    #[cfg(not(feature = "std"))]
+    fn from(_source: rand_core::Error) -> Error {
+        Error::new()
+    }
+
+    #[cfg(feature = "std")]
+    fn from(source: rand_core::Error) -> Error {
+        Error::from_source(source)
+    }
+}
+
 #[cfg(feature = "std")]
 impl std::error::Error for Error {
     fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {