Struct RsaPublicKey 

pub struct RsaPublicKey {
    pub n: BigUint,
    pub e: BigUint,
}

Represents an RSA public key with arbitrary-size modulus and exponent.

Fields

n: BigUint

e: BigUint

Implementations

impl RsaPublicKey

pub fn from_be_bytes(n: &[u8], e: &[u8]) -> Result<Self>

Creates public key from big-endian modulus and exponent bytes.

Arguments

• n: RSA modulus encoded as big-endian bytes.
• e: RSA public exponent encoded as big-endian bytes.

Returns

Parsed RsaPublicKey when both fields are non-empty.

Errors

Returns Error::InvalidLength when fields are empty, or when modulus size is below 2048 bits in default-safe builds (legacy-compatible hazardous mode permits smaller imports), or other RSA component validation errors from [validate_public_components].

pub fn from_u128(n: u128, e: u128) -> Self

Creates public key from small integers for compatibility tests.

Arguments

• n: RSA modulus value.
• e: RSA public exponent value.

Returns

RsaPublicKey converted from the provided integer values.

pub fn clear(&mut self)

Clears public key material to a zeroized placeholder state.

Notes

This mirrors explicit key free/reset lifecycle flows from the C surface.

pub fn verify_digest(&self, digest: &[u8], signature: &[u8]) -> Result<()>

Verifies a digest representative by recovering signature with exponent e.

Arguments

• digest: Expected digest representative bytes.
• signature: RSA signature to verify.

Returns

Ok(()) when the recovered representative equals digest mod n.

pub fn verify_pkcs1_v15_sha256( &self, msg: &[u8], signature: &[u8], ) -> Result<()>

Verifies RSASSA-PKCS1-v1_5 signature for SHA-256 hashed message.

Arguments

• msg: Original message bytes.
• signature: RSA signature expected to be PKCS#1 v1.5 encoded.

Returns

Ok(()) when signature verification succeeds.

pub fn verify_pkcs1_v15_sha1(&self, msg: &[u8], signature: &[u8]) -> Result<()>

Verifies RSASSA-PKCS1-v1_5 signature for SHA-1 hashed message.

Arguments

• msg: Original message bytes.
• signature: RSA signature expected to be PKCS#1 v1.5 encoded.

Returns

Ok(()) when signature verification succeeds.

pub fn verify_pkcs1_v15_sha384( &self, msg: &[u8], signature: &[u8], ) -> Result<()>

Verifies RSASSA-PKCS1-v1_5 signature for SHA-384 hashed message.

Arguments

• msg: Original message bytes.
• signature: RSA signature expected to be PKCS#1 v1.5 encoded.

Returns

Ok(()) when signature verification succeeds.

pub fn verify_pkcs1_v15_sha512( &self, msg: &[u8], signature: &[u8], ) -> Result<()>

Verifies RSASSA-PKCS1-v1_5 signature for SHA-512 hashed message.

Arguments

• msg: Original message bytes.
• signature: RSA signature expected to be PKCS#1 v1.5 encoded.

Returns

Ok(()) when signature verification succeeds.

pub fn verify_pss_sha256( &self, msg: &[u8], signature: &[u8], salt_len: usize, ) -> Result<()>

Verifies RSASSA-PSS signature for SHA-256 hashed message.

Arguments

• msg: Original message bytes.
• signature: RSA signature expected to be PSS encoded.
• salt_len: Expected salt length used by signer.

Returns

Ok(()) when signature verification succeeds.

pub fn verify_pss_sha384( &self, msg: &[u8], signature: &[u8], salt_len: usize, ) -> Result<()>

Verifies RSASSA-PSS signature for SHA-384 hashed message.

Arguments

• msg: Original message bytes.
• signature: RSA signature expected to be PSS encoded.
• salt_len: Expected salt length used by signer.

Returns

Ok(()) when signature verification succeeds.

pub fn encrypt_pkcs1_v15_auto( &self, plaintext: &[u8], drbg: &mut HmacDrbgSha256, ) -> Result<Vec<u8>>

Encrypts plaintext using RSAES-PKCS1-v1_5 with DRBG-sourced non-zero padding.

Arguments

• plaintext: Plaintext bytes to encrypt.
• drbg: DRBG used to generate PKCS#1 v1.5 PS bytes.

Returns

Ciphertext bytes padded to modulus length.

pub fn encrypt_oaep_sha256_auto( &self, plaintext: &[u8], label: &[u8], drbg: &mut HmacDrbgSha256, ) -> Result<Vec<u8>>

Encrypts plaintext using RSAES-OAEP with SHA-256 and DRBG-derived seed.

Arguments

• plaintext: Plaintext bytes to encrypt.
• label: OAEP label bytes hashed into encoding parameters.
• drbg: DRBG used to generate OAEP seed bytes.

Returns

Ciphertext bytes padded to modulus length.

Trait Implementations

impl Clone for RsaPublicKey

fn clone(&self) -> RsaPublicKey

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RsaPublicKey

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.