cypheron-core 0.1.2

Post-quantum cryptography library with NIST-standardized quantum-resistant algorithms
Documentation 
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// Copyright 2025 Cypheron Labs, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use thiserror::Error;

#[derive(Error, Debug, Clone, PartialEq, Eq)]
pub enum DilithiumError {
    #[error("Random number generation failed during key generation")]
    KeyGenerationRngFailure,
    #[error("An internal error occurred during key generation")]
    KeyGenerationInternalError,
    #[error("Random number generation failed during signing")]
    SigningRngFailure,
    #[error("An internal error occurred during signing")]
    SigningInternalError,
    #[error("Dilithium C library returned error code: {code}")]
    CLibraryError { code: i32 },
    #[error("Invalid input parameters provided to Dilithium function")]
    InvalidInput,
    #[error("Memory allocation failed in Dilithium operation")]
    MemoryAllocationFailed,
    #[error("Cryptographic operation failed - possible invalid key or signature")]
    CryptographicFailure,
}

impl DilithiumError {
    pub fn from_c_code(code: i32, operation: &str) -> Self {
        match code {
            0 => panic!("Should not map success code 0 to error"),
            -1 => match operation {
                "keypair" => DilithiumError::KeyGenerationInternalError,
                "sign" => DilithiumError::SigningInternalError,
                _ => DilithiumError::CryptographicFailure,
            },
            1 => DilithiumError::InvalidInput,
            2 => DilithiumError::MemoryAllocationFailed,
            3 => match operation {
                "keypair" => DilithiumError::KeyGenerationRngFailure,
                "sign" => DilithiumError::SigningRngFailure,
                _ => DilithiumError::CryptographicFailure,
            },
            _ => DilithiumError::CLibraryError { code },
        }
    }
}