309e2794a1
- Implement storage service for file management - Add support for external and system storage backends - Include utility functions for environment variables - Add hash utilities for secure operations - Implement validation utilities for data integrity - Support file encryption and secure storage - Add proper error handling and logging for storage operations
86 lines
2.1 KiB
Go
86 lines
2.1 KiB
Go
package utils
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import (
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"crypto/rand"
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"crypto/subtle"
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"encoding/base64"
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"fmt"
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"strings"
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"golang.org/x/crypto/argon2"
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)
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type Argon2Params struct {
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Memory uint32
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Iterations uint32
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Parallelism uint8
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SaltLength uint32
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KeyLength uint32
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}
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// Default secure parameters
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var DefaultParams = &Argon2Params{
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Memory: 64 * 1024, // 64 MB
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Iterations: 3,
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Parallelism: 2,
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SaltLength: 16,
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KeyLength: 32,
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}
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// HashPassword creates a secure Argon2id hash
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func HashPassword(password string, p *Argon2Params) (string, error) {
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// Generate salt
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salt := make([]byte, p.SaltLength)
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_, err := rand.Read(salt)
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if err != nil {
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return "", fmt.Errorf("failed to generate salt: %w", err)
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}
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// Calculate hash
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hash := argon2.IDKey([]byte(password), salt, p.Iterations, p.Memory, p.Parallelism, p.KeyLength)
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// Format: $argon2id$v=19$m=65536,t=3,p=2$<salt>$<hash>
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encoded := fmt.Sprintf("$argon2id$v=19$m=%d,t=%d,p=%d$%s$%s",
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p.Memory, p.Iterations, p.Parallelism,
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base64.RawStdEncoding.EncodeToString(salt),
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base64.RawStdEncoding.EncodeToString(hash),
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)
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return encoded, nil
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}
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// VerifyPassword checks if the password matches the hash
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func VerifyPassword(password, encodedHash string) (bool, error) {
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parts := strings.Split(encodedHash, "$")
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if len(parts) != 6 {
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return false, fmt.Errorf("invalid hash format")
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}
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var memory uint32
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var iterations uint32
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var parallelism uint8
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_, err := fmt.Sscanf(parts[3], "m=%d,t=%d,p=%d", &memory, &iterations, ¶llelism)
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if err != nil {
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return false, fmt.Errorf("invalid hash parameters: %w", err)
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}
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// Decode salt and hash
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salt, err := base64.RawStdEncoding.DecodeString(parts[4])
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if err != nil {
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return false, fmt.Errorf("invalid salt encoding: %w", err)
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}
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expectedHash, err := base64.RawStdEncoding.DecodeString(parts[5])
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if err != nil {
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return false, fmt.Errorf("invalid hash encoding: %w", err)
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}
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// Recalculate hash with the same parameters
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hash := argon2.IDKey([]byte(password), salt, iterations, memory, parallelism, uint32(len(expectedHash)))
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// Constant time comparison
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if subtle.ConstantTimeCompare(hash, expectedHash) == 1 {
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return true, nil
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}
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return false, nil
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}
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