51 lines
1.6 KiB
Go
51 lines
1.6 KiB
Go
package helper
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import (
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"log"
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lzstring "github.com/daku10/go-lz-string"
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)
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// StringDecrypt - langsung coba decompress tanpa decrypt ulang
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func StringDecrypt(key string, encryptedString string) (string, error) {
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log.Printf("StringDecrypt: Attempting decompression, data length: %d", len(encryptedString))
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// Method 1: Try direct LZ-string decompression (data sudah didecrypt di response.go)
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if result, err := lzstring.DecompressFromEncodedURIComponent(encryptedString); err == nil && len(result) > 0 {
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log.Printf("StringDecrypt: Direct decompression successful")
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return result, nil
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}
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// Method 2: Try other LZ-string methods
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if result, err := lzstring.DecompressFromBase64(encryptedString); err == nil && len(result) > 0 {
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log.Printf("StringDecrypt: Base64 decompression successful")
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return result, nil
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}
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// Method 3: If all fail, return the original string
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log.Printf("StringDecrypt: All decompression failed, returning original data")
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return encryptedString, nil
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}
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func RemovePKCS7Padding(data []byte) []byte {
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if len(data) == 0 {
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return data
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}
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paddingLength := int(data[len(data)-1])
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if paddingLength > len(data) || paddingLength == 0 {
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log.Printf("RemovePKCS7Padding: Invalid padding length: %d, data length: %d", paddingLength, len(data))
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return data // Return original data if padding is invalid
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}
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// Verify all padding bytes are correct
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for i := len(data) - paddingLength; i < len(data); i++ {
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if data[i] != byte(paddingLength) {
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log.Printf("RemovePKCS7Padding: Invalid padding byte at position %d", i)
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return data // Return original data if padding is invalid
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}
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}
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return data[:len(data)-paddingLength]
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}
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