32a3613a3a
Add four new infrastructure packages with CLI commands: - pkg/config: layered configuration (defaults → file → env → flags) - pkg/crypt: crypto primitives (Argon2id, AES-GCM, ChaCha20, HMAC, checksums) - pkg/plugin: plugin system with GitHub-based install/update/remove - pkg/collect: collection subsystem (GitHub, BitcoinTalk, market, papers, excavate) Fix all golangci-lint issues across the entire codebase (~100 errcheck, staticcheck SA1012/SA1019/ST1005, unused, ineffassign fixes) so that `core go qa` passes with 0 issues. Closes #167, #168, #170, #250, #251, #252, #253, #254, #255, #256 Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
100 lines
3 KiB
Go
100 lines
3 KiB
Go
package crypt
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import (
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"crypto/aes"
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"crypto/cipher"
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"crypto/rand"
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core "github.com/host-uk/core/pkg/framework/core"
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"golang.org/x/crypto/chacha20poly1305"
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)
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// ChaCha20Encrypt encrypts plaintext using ChaCha20-Poly1305.
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// The key must be 32 bytes. The nonce is randomly generated and prepended
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// to the ciphertext.
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func ChaCha20Encrypt(plaintext, key []byte) ([]byte, error) {
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aead, err := chacha20poly1305.NewX(key)
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if err != nil {
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return nil, core.E("crypt.ChaCha20Encrypt", "failed to create cipher", err)
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}
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nonce := make([]byte, aead.NonceSize())
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if _, err := rand.Read(nonce); err != nil {
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return nil, core.E("crypt.ChaCha20Encrypt", "failed to generate nonce", err)
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}
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ciphertext := aead.Seal(nonce, nonce, plaintext, nil)
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return ciphertext, nil
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}
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// ChaCha20Decrypt decrypts ciphertext encrypted with ChaCha20Encrypt.
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// The key must be 32 bytes. Expects the nonce prepended to the ciphertext.
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func ChaCha20Decrypt(ciphertext, key []byte) ([]byte, error) {
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aead, err := chacha20poly1305.NewX(key)
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if err != nil {
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return nil, core.E("crypt.ChaCha20Decrypt", "failed to create cipher", err)
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}
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nonceSize := aead.NonceSize()
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if len(ciphertext) < nonceSize {
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return nil, core.E("crypt.ChaCha20Decrypt", "ciphertext too short", nil)
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}
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nonce, encrypted := ciphertext[:nonceSize], ciphertext[nonceSize:]
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plaintext, err := aead.Open(nil, nonce, encrypted, nil)
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if err != nil {
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return nil, core.E("crypt.ChaCha20Decrypt", "failed to decrypt", err)
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}
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return plaintext, nil
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}
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// AESGCMEncrypt encrypts plaintext using AES-256-GCM.
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// The key must be 32 bytes. The nonce is randomly generated and prepended
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// to the ciphertext.
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func AESGCMEncrypt(plaintext, key []byte) ([]byte, error) {
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block, err := aes.NewCipher(key)
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if err != nil {
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return nil, core.E("crypt.AESGCMEncrypt", "failed to create cipher", err)
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}
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aead, err := cipher.NewGCM(block)
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if err != nil {
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return nil, core.E("crypt.AESGCMEncrypt", "failed to create GCM", err)
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}
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nonce := make([]byte, aead.NonceSize())
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if _, err := rand.Read(nonce); err != nil {
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return nil, core.E("crypt.AESGCMEncrypt", "failed to generate nonce", err)
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}
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ciphertext := aead.Seal(nonce, nonce, plaintext, nil)
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return ciphertext, nil
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}
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// AESGCMDecrypt decrypts ciphertext encrypted with AESGCMEncrypt.
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// The key must be 32 bytes. Expects the nonce prepended to the ciphertext.
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func AESGCMDecrypt(ciphertext, key []byte) ([]byte, error) {
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block, err := aes.NewCipher(key)
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if err != nil {
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return nil, core.E("crypt.AESGCMDecrypt", "failed to create cipher", err)
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}
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aead, err := cipher.NewGCM(block)
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if err != nil {
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return nil, core.E("crypt.AESGCMDecrypt", "failed to create GCM", err)
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}
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nonceSize := aead.NonceSize()
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if len(ciphertext) < nonceSize {
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return nil, core.E("crypt.AESGCMDecrypt", "ciphertext too short", nil)
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}
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nonce, encrypted := ciphertext[:nonceSize], ciphertext[nonceSize:]
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plaintext, err := aead.Open(nil, nonce, encrypted, nil)
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if err != nil {
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return nil, core.E("crypt.AESGCMDecrypt", "failed to decrypt", err)
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}
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return plaintext, nil
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}
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