66 lines
1.6 KiB
Rust
66 lines
1.6 KiB
Rust
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//! Traits related to the key components
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use num_bigint::{BigInt, BigUint};
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use zeroize::Zeroize;
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/// Components of an RSA public key.
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pub trait PublicKeyParts {
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/// Returns the modulus of the key.
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fn n(&self) -> &BigUint;
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/// Returns the public exponent of the key.
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fn e(&self) -> &BigUint;
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/// Returns the modulus size in bytes. Raw signatures and ciphertexts for
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/// or by this public key will have the same size.
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fn size(&self) -> usize {
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(self.n().bits() + 7) / 8
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}
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}
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/// Components of an RSA private key.
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pub trait PrivateKeyParts: PublicKeyParts {
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/// Returns the private exponent of the key.
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fn d(&self) -> &BigUint;
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/// Returns the prime factors.
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fn primes(&self) -> &[BigUint];
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/// Returns the precomputed dp value, D mod (P-1)
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fn dp(&self) -> Option<&BigUint>;
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/// Returns the precomputed dq value, D mod (Q-1)
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fn dq(&self) -> Option<&BigUint>;
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/// Returns the precomputed qinv value, Q^-1 mod P
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fn qinv(&self) -> Option<&BigInt>;
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/// Returns an iterator over the CRT Values
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fn crt_values(&self) -> Option<&[CrtValue]>;
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}
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/// Contains the precomputed Chinese remainder theorem values.
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#[derive(Debug, Clone)]
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pub struct CrtValue {
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/// D mod (prime - 1)
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pub(crate) exp: BigInt,
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/// R·Coeff ≡ 1 mod Prime.
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pub(crate) coeff: BigInt,
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/// product of primes prior to this (inc p and q)
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pub(crate) r: BigInt,
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}
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impl Zeroize for CrtValue {
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fn zeroize(&mut self) {
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self.exp.zeroize();
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self.coeff.zeroize();
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self.r.zeroize();
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}
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}
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impl Drop for CrtValue {
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fn drop(&mut self) {
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self.zeroize();
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}
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}
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