ring / curve25519-dalek possible incompatibility

Cargo.lock

[root]
name = "ring-dalek"
version = "0.1.0"
dependencies = [
 "curve25519-dalek 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "ring 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]

[[package]]
name = "arrayref"
version = "0.3.4"
source = "registry+https://github.com/rust-lang/crates.io-index"

[[package]]
name = "bitflags"
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source = "registry+https://github.com/rust-lang/crates.io-index"

[[package]]
name = "coco"
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source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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]

[[package]]
name = "conv"
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source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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]

[[package]]
name = "curve25519-dalek"
version = "0.10.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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 "rand 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
 "subtle 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
]

[[package]]
name = "custom_derive"
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source = "registry+https://github.com/rust-lang/crates.io-index"

[[package]]
name = "digest"
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source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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]

[[package]]
name = "either"
version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"

[[package]]
name = "futures"
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source = "registry+https://github.com/rust-lang/crates.io-index"

[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"

[[package]]
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[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"

[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"

[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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]

[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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]

[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"

[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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]

[[package]]
name = "odds"
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source = "registry+https://github.com/rust-lang/crates.io-index"

[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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]

[[package]]
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dependencies = [
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]

[[package]]
name = "rayon-core"
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source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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]

[[package]]
name = "ring"
version = "0.11.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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]

[[package]]
name = "scopeguard"
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source = "registry+https://github.com/rust-lang/crates.io-index"

[[package]]
name = "subtle"
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source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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]

[[package]]
name = "typenum"
version = "1.9.0"
source = "registry+https://github.com/rust-lang/crates.io-index"

[[package]]
name = "untrusted"
version = "0.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"

[metadata]
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"checksum coco 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c06169f5beb7e31c7c67ebf5540b8b472d23e3eade3b2ec7d1f5b504a85f91bd"
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"checksum curve25519-dalek 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "08cb827885e49a3b696deb399ea1f0ea4ade1300fc8ce65b3395739e899b0f00"
"checksum custom_derive 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "ef8ae57c4978a2acd8b869ce6b9ca1dfe817bff704c220209fdef2c0b75a01b9"
"checksum digest 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e5b29bf156f3f4b3c4f610a25ff69370616ae6e0657d416de22645483e72af0a"
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"checksum futures 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)" = "4b63a4792d4f8f686defe3b39b92127fea6344de5d38202b2ee5a11bbbf29d6a"
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"checksum nodrop 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "52cd74cd09beba596430cc6e3091b74007169a56246e1262f0ba451ea95117b2"
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Cargo.toml

[package]
name = "ring-dalek"
version = "0.1.0"

[dependencies]
curve25519-dalek = "0.10"
ring = "0.11"
untrusted = "0.5"

[[bin]]
name = "main"
path = "./src/main.rs"

env.txt

heartsucker@pythagoras:/tmp/ring-dalek$ cargo --version
cargo 0.22.0-nightly (7704f7b1f 2017-08-09)
heartsucker@pythagoras:/tmp/ring-dalek$ rustc --version
rustc 1.21.0-nightly (ab40a7cb0 2017-08-13)

main.rs

extern crate curve25519_dalek;
extern crate ring;
extern crate untrusted;

use curve25519_dalek::curve::CompressedEdwardsY;
use ring::rand::SystemRandom;
use ring::signature::Ed25519KeyPair;

fn main() {
    for _ in 1..1000 {
        let pkcs8_bytes = Ed25519KeyPair::generate_pkcs8(&SystemRandom::new())
            .expect("Couldn't make key");
        let pair = Ed25519KeyPair::from_pkcs8(untrusted::Input::from(&pkcs8_bytes))
            .expect("Failed to parse bytes");

        let pub_point = pair.public_key_bytes();
        let mut pub_point_array = [0; 32];
        for i in 0..32 {
            pub_point_array[0] = pub_point[i];
        }
        
        CompressedEdwardsY(pub_point_array).decompress().expect("could not decompress");
    }        
}

pub_point_array[0] = pub_point[i];

pub_point_array[i] = pub_point[i];, perhaps? Or even better, use copy_from_slice().