mirror of
https://github.com/percona/percona-toolkit.git
synced 2025-09-02 02:34:19 +00:00
122 lines
4.5 KiB
Go
122 lines
4.5 KiB
Go
package main
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import (
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"crypto/aes"
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"crypto/cipher"
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"crypto/sha256"
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"io"
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"os"
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"path/filepath"
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"strings"
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"github.com/pkg/errors"
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log "github.com/sirupsen/logrus"
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"golang.org/x/crypto/hkdf"
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)
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var (
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hkdfInfo = []byte("Percona Toolkit")
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salt = [256]byte{
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0x33, 0xc5, 0xc5, 0x5f, 0x3e, 0x81, 0xf6, 0x8d, 0x51, 0xd8, 0x18, 0xb9, 0xb7, 0x09, 0x70, 0x51,
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0xc3, 0x60, 0x66, 0xef, 0xd4, 0x97, 0x2e, 0xdf, 0x11, 0x59, 0x34, 0x94, 0x47, 0xab, 0xd4, 0x44,
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0xac, 0x2e, 0x89, 0x81, 0x85, 0xd5, 0x83, 0xbd, 0x2d, 0xb5, 0x43, 0xdd, 0xd7, 0x6c, 0x1b, 0xa7,
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0x6d, 0x8f, 0xb7, 0x84, 0x33, 0x1a, 0x5e, 0x31, 0x76, 0x4b, 0x5d, 0x3b, 0x98, 0x38, 0xe3, 0x93,
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0x28, 0xcc, 0x91, 0x30, 0x37, 0xb6, 0x06, 0xd2, 0xab, 0xdc, 0x9a, 0x14, 0xab, 0xb7, 0xd2, 0x90,
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0xd6, 0x1f, 0x1c, 0xc1, 0x74, 0x2c, 0xc2, 0x08, 0x27, 0x68, 0x7a, 0xdd, 0xef, 0x6e, 0xb9, 0x59,
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0xb0, 0x2f, 0x76, 0x36, 0xba, 0xd8, 0x55, 0x22, 0xba, 0x95, 0xd6, 0xfa, 0xa1, 0x69, 0xab, 0x95,
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0x94, 0x1f, 0x61, 0x7f, 0x56, 0x34, 0xaa, 0x17, 0x78, 0xf8, 0xbb, 0xa0, 0x4e, 0x61, 0xad, 0xee,
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0x51, 0x1c, 0x42, 0xa7, 0x07, 0x44, 0xd5, 0xa6, 0x16, 0x72, 0x1b, 0x05, 0x4e, 0xd4, 0xbf, 0x32,
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0x7d, 0xec, 0x8d, 0x4b, 0x19, 0xd2, 0x32, 0x50, 0x3d, 0x1f, 0x2a, 0x51, 0xc9, 0x62, 0x22, 0x75,
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0xb5, 0xde, 0x0d, 0x58, 0x2b, 0x3a, 0xf8, 0x0e, 0xfc, 0x43, 0x07, 0xc3, 0x60, 0x65, 0x83, 0x3d,
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0xa9, 0x84, 0x02, 0x3a, 0x13, 0x85, 0x3e, 0x8d, 0x87, 0x04, 0xee, 0x58, 0x8d, 0x9a, 0xbc, 0xc0,
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0xec, 0xdd, 0x92, 0xf3, 0x96, 0x03, 0x86, 0xbe, 0x51, 0xb8, 0x96, 0xd5, 0x38, 0xed, 0x03, 0x7b,
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0x18, 0x77, 0x26, 0xaf, 0x15, 0x94, 0x60, 0x25, 0x1b, 0x3f, 0x57, 0xa7, 0xe4, 0xe6, 0x63, 0xf8,
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0xe2, 0xca, 0x15, 0x3d, 0xa3, 0xee, 0xcb, 0xef, 0xb3, 0x23, 0x41, 0x54, 0xd4, 0xaa, 0x93, 0xb4,
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0x48, 0xd3, 0x97, 0x7c, 0x39, 0x5e, 0x1d, 0x05, 0x93, 0x34, 0x70, 0xdf, 0xd6, 0xf0, 0x30, 0xc7,
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}
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)
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func encryptorCmd(opts *cliOptions) (err error) {
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hkdf := hkdf.New(sha256.New, []byte(*opts.EncryptPassword), salt[:], hkdfInfo)
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key := make([]byte, 32)
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if _, err := io.ReadFull(hkdf, key); err != nil {
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return errors.Wrap(err, "Cannot derive key from password")
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}
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switch opts.Command {
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case "decrypt":
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if *opts.DecryptOutFile == "" && strings.HasSuffix(*opts.DecryptInFile, ".aes") {
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*opts.DecryptOutFile = strings.TrimSuffix(filepath.Base(*opts.DecryptInFile), ".aes")
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}
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log.Infof("Decrypting file %q into %q", *opts.DecryptInFile, *opts.DecryptOutFile)
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err = decrypt(*opts.DecryptInFile, *opts.DecryptOutFile, key)
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case "encrypt":
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if *opts.EncryptOutFile == "" {
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*opts.EncryptOutFile = filepath.Base(*opts.EncryptInFile) + ".aes"
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}
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log.Infof("Encrypting file %q into %q", *opts.EncryptInFile, *opts.EncryptOutFile)
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err = encrypt(*opts.EncryptInFile, *opts.EncryptOutFile, key)
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}
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return
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}
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func encrypt(infile, outfile string, key []byte) error {
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inFile, err := os.Open(infile)
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if err != nil {
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return errors.Wrapf(err, "Cannot open input file %q", infile)
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}
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defer inFile.Close()
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block, err := aes.NewCipher(key)
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if err != nil {
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return errors.Wrapf(err, "Cannot create a new cipher")
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}
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// If the key is unique for each ciphertext, then it's ok to use a zero IV.
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var iv [aes.BlockSize]byte
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stream := cipher.NewOFB(block, iv[:])
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outFile, err := os.OpenFile(outfile, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0o600)
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if err != nil {
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return errors.Wrapf(err, "Cannot create output file %q", outfile)
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}
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defer outFile.Close()
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writer := &cipher.StreamWriter{S: stream, W: outFile}
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// Copy the input file to the output file, encrypting as we go.
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if _, err := io.Copy(writer, inFile); err != nil {
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return errors.Wrapf(err, "Cannot write to output file %q", outfile)
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}
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return nil
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}
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func decrypt(infile, outfile string, key []byte) error {
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inFile, err := os.Open(infile)
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if err != nil {
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return errors.Wrapf(err, "Cannot open %q for reading", infile)
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}
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defer inFile.Close()
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block, err := aes.NewCipher(key)
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if err != nil {
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return errors.Wrap(err, "Cannot create the cipher")
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}
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// If the key is unique for each ciphertext, then it's ok to use a zero IV.
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var iv [aes.BlockSize]byte
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stream := cipher.NewOFB(block, iv[:])
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outFile, err := os.OpenFile(outfile, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0o600)
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if err != nil {
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return errors.Wrapf(err, "Cannot open %q for writing", outfile)
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}
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defer outFile.Close()
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reader := &cipher.StreamReader{S: stream, R: inFile}
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// Copy the input file to the output file, decrypting as we go.
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if _, err := io.Copy(outFile, reader); err != nil {
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return errors.Wrapf(err, "Cannot write to output file %q", outfile)
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}
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return nil
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}
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