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crypto-common: make all generate_* functions fallible #1378

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crypto-common: make all generate_* functions fallible #1378

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68 changes: 12 additions & 56 deletions crypto-common/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -162,23 +162,14 @@ pub trait KeyInit: KeySizeUser + Sized {
/// Generate random key using the operating system's secure RNG.
#[cfg(feature = "getrandom")]
#[inline]
fn generate_key() -> Key<Self> {
fn generate_key() -> Result<Key<Self>, rand_core::Error> {
Self::generate_key_with_rng(&mut OsRng)
}

/// Generate random key using the provided [`CryptoRngCore`].
#[cfg(feature = "rand_core")]
#[inline]
fn generate_key_with_rng(rng: &mut impl CryptoRngCore) -> Key<Self> {
Self::try_generate_key_with_rng(rng).expect("RNG failure")
}

/// Generate random key using the provided [`CryptoRngCore`], returning an error on RNG failure.
#[cfg(feature = "rand_core")]
#[inline]
fn try_generate_key_with_rng(
rng: &mut impl CryptoRngCore,
) -> Result<Key<Self>, rand_core::Error> {
fn generate_key_with_rng(rng: &mut impl CryptoRngCore) -> Result<Key<Self>, rand_core::Error> {
let mut key = Key::<Self>::default();
rng.try_fill_bytes(&mut key)?;
Ok(key)
Expand All @@ -201,23 +192,14 @@ pub trait KeyIvInit: KeySizeUser + IvSizeUser + Sized {
/// Generate random key using the operating system's secure RNG.
#[cfg(feature = "getrandom")]
#[inline]
fn generate_key() -> Key<Self> {
fn generate_key() -> Result<Key<Self>, rand_core::Error> {
Self::generate_key_with_rng(&mut OsRng)
}

/// Generate random key using the provided [`CryptoRngCore`].
#[cfg(feature = "rand_core")]
#[inline]
fn generate_key_with_rng(rng: &mut impl CryptoRngCore) -> Key<Self> {
Self::try_generate_key_with_rng(rng).expect("RNG failure")
}

/// Generate random key using the provided [`CryptoRngCore`], returning an error on RNG failure.
#[cfg(feature = "rand_core")]
#[inline]
fn try_generate_key_with_rng(
rng: &mut impl CryptoRngCore,
) -> Result<Key<Self>, rand_core::Error> {
fn generate_key_with_rng(rng: &mut impl CryptoRngCore) -> Result<Key<Self>, rand_core::Error> {
let mut key = Key::<Self>::default();
rng.try_fill_bytes(&mut key)?;
Ok(key)
Expand All @@ -226,23 +208,14 @@ pub trait KeyIvInit: KeySizeUser + IvSizeUser + Sized {
/// Generate random IV using the operating system's secure RNG.
#[cfg(feature = "getrandom")]
#[inline]
fn generate_iv() -> Iv<Self> {
fn generate_iv() -> Result<Iv<Self>, rand_core::Error> {
Self::generate_iv_with_rng(&mut OsRng)
}

/// Generate random IV using the provided [`CryptoRngCore`].
#[cfg(feature = "rand_core")]
#[inline]
fn generate_iv_with_rng(rng: &mut impl CryptoRngCore) -> Iv<Self> {
Self::try_generate_iv_with_rng(rng).expect("RNG failure")
}

/// Generate random IV using the provided [`CryptoRngCore`], returning an error on RNG failure.
#[cfg(feature = "rand_core")]
#[inline]
fn try_generate_iv_with_rng(
rng: &mut impl CryptoRngCore,
) -> Result<Iv<Self>, rand_core::Error> {
fn generate_iv_with_rng(rng: &mut impl CryptoRngCore) -> Result<Iv<Self>, rand_core::Error> {
let mut iv = Iv::<Self>::default();
rng.try_fill_bytes(&mut iv)?;
Ok(iv)
Expand All @@ -251,26 +224,18 @@ pub trait KeyIvInit: KeySizeUser + IvSizeUser + Sized {
/// Generate random key and IV using the operating system's secure RNG.
#[cfg(feature = "getrandom")]
#[inline]
fn generate_key_iv() -> (Key<Self>, Iv<Self>) {
fn generate_key_iv() -> Result<(Key<Self>, Iv<Self>), rand_core::Error> {
Self::generate_key_iv_with_rng(&mut OsRng)
}

/// Generate random key and IV using the provided [`CryptoRngCore`].
#[cfg(feature = "rand_core")]
#[inline]
fn generate_key_iv_with_rng(rng: &mut impl CryptoRngCore) -> (Key<Self>, Iv<Self>) {
Self::try_generate_key_iv_with_rng(rng).expect("RNG failure")
}

/// Generate random key and IV using the provided [`CryptoRngCore`], returning an error on RNG
/// failure.
#[cfg(feature = "rand_core")]
#[inline]
fn try_generate_key_iv_with_rng(
fn generate_key_iv_with_rng(
rng: &mut impl CryptoRngCore,
) -> Result<(Key<Self>, Iv<Self>), rand_core::Error> {
let key = Self::try_generate_key_with_rng(rng)?;
let iv = Self::try_generate_iv_with_rng(rng)?;
let key = Self::generate_key_with_rng(rng)?;
let iv = Self::generate_iv_with_rng(rng)?;
Ok((key, iv))
}
}
Expand Down Expand Up @@ -301,23 +266,14 @@ pub trait InnerIvInit: InnerUser + IvSizeUser + Sized {
/// Generate random IV using the operating system's secure RNG.
#[cfg(feature = "getrandom")]
#[inline]
fn generate_iv() -> Iv<Self> {
fn generate_iv() -> Result<Iv<Self>, rand_core::Error> {
Self::generate_iv_with_rng(&mut OsRng)
}

/// Generate random IV using the provided [`CryptoRngCore`].
#[cfg(feature = "rand_core")]
#[inline]
fn generate_iv_with_rng(rng: &mut impl CryptoRngCore) -> Iv<Self> {
Self::try_generate_iv_with_rng(rng).expect("RNG failure")
}

/// Generate random IV using the provided [`CryptoRngCore`], returning an error on RNG failure.
#[cfg(feature = "rand_core")]
#[inline]
fn try_generate_iv_with_rng(
rng: &mut impl CryptoRngCore,
) -> Result<Iv<Self>, rand_core::Error> {
fn generate_iv_with_rng(rng: &mut impl CryptoRngCore) -> Result<Iv<Self>, rand_core::Error> {
let mut iv = Iv::<Self>::default();
rng.try_fill_bytes(&mut iv)?;
Ok(iv)
Expand Down