stacktic/dropbox
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stacktic
2014-02-24 19:22:35 +01:00
parent cb92bcb643
commit 47f279a224
2 changed files with 176 additions and 164 deletions
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crypto.go
+15 -15
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@@ -33,7 +33,7 @@ import (
"os"
)
// Generate a key by reading length bytes from /dev/random
// GenerateKey generates a key by reading length bytes from /dev/random
func GenerateKey(length int) ([]byte, error) {
var err error
var fd io.Reader
@@ -74,13 +74,13 @@ func newDecrypter(key []byte, in io.Reader, size int, newCipher func(key []byte)
return rd, nil
}
// Create and return a new io.ReadCloser to decrypt the given io.Reader containing size bytes with the given AES key.
// NewAESDecrypterReader creates and returns a new io.ReadCloser to decrypt the given io.Reader containing size bytes with the given AES key.
// The AES key should be either 16, 24, or 32 bytes to select AES-128, AES-192, or AES-256.
func NewAESDecrypterReader(key []byte, input io.Reader, size int) (io.ReadCloser, error) {
return newDecrypter(key, input, size, aes.NewCipher)
}
// Create and return a new io.ReadCloser to encrypt the given io.Reader containing size bytes with the given AES key.
// NewAESCrypterReader creates and returns a new io.ReadCloser to encrypt the given io.Reader containing size bytes with the given AES key.
// The AES key should be either 16, 24, or 32 bytes to select AES-128, AES-192, or AES-256.
func NewAESCrypterReader(key []byte, input io.Reader, size int) (io.ReadCloser, int, error) {
return newCrypter(key, input, size, aes.NewCipher)
@@ -162,8 +162,8 @@ func decrypt(block cipher.Block, in io.Reader, size int, out io.WriteCloser) err
return err
}
// Upload and encrypt size bytes from the input reader to the dst path on Dropbox.
func (self *Dropbox) FilesPutAES(key []byte, input io.ReadCloser, size int64, dst string, overwrite bool, parentRev string) (*Entry, error) {
// FilesPutAES uploads and encrypts size bytes from the input reader to the dst path on Dropbox.
func (db *Dropbox) FilesPutAES(key []byte, input io.ReadCloser, size int64, dst string, overwrite bool, parentRev string) (*Entry, error) {
var encreader io.ReadCloser
var outsize int
var err error
@@ -171,11 +171,11 @@ func (self *Dropbox) FilesPutAES(key []byte, input io.ReadCloser, size int64, ds
if encreader, outsize, err = NewAESCrypterReader(key, input, int(size)); err != nil {
return nil, err
}
return self.FilesPut(encreader, int64(outsize), dst, overwrite, parentRev)
return db.FilesPut(encreader, int64(outsize), dst, overwrite, parentRev)
}
// Upload and encrypt the file located in the src path on the local disk to the dst path on Dropbox.
func (self *Dropbox) UploadFileAES(key []byte, src, dst string, overwrite bool, parentRev string) (*Entry, error) {
// UploadFileAES uploads and encrypts the file located in the src path on the local disk to the dst path on Dropbox.
func (db *Dropbox) UploadFileAES(key []byte, src, dst string, overwrite bool, parentRev string) (*Entry, error) {
var err error
var fd *os.File
var fsize int64
@@ -190,23 +190,23 @@ func (self *Dropbox) UploadFileAES(key []byte, src, dst string, overwrite bool,
} else {
return nil, err
}
return self.FilesPutAES(key, fd, fsize, dst, overwrite, parentRev)
return db.FilesPutAES(key, fd, fsize, dst, overwrite, parentRev)
}
// Download and decrypt the file located in the src path on Dropbox and return a io.ReadCloser.
func (self *Dropbox) DownloadAES(key []byte, src, rev string, offset int) (io.ReadCloser, error) {
// DownloadAES downloads and decrypts the file located in the src path on Dropbox and return a io.ReadCloser.
func (db *Dropbox) DownloadAES(key []byte, src, rev string, offset int) (io.ReadCloser, error) {
var in io.ReadCloser
var size int64
var err error
if in, size, err = self.Download(src, rev, offset); err != nil {
if in, size, err = db.Download(src, rev, offset); err != nil {
return nil, err
}
return NewAESDecrypterReader(key, in, int(size))
}
// Download and decrypt the file located in the src path on Dropbox to the dst file on the local disk.
func (self *Dropbox) DownloadToFileAES(key []byte, src, dst, rev string) error {
// DownloadToFileAES downloads and decrypts the file located in the src path on Dropbox to the dst file on the local disk.
func (db *Dropbox) DownloadToFileAES(key []byte, src, dst, rev string) error {
var input io.ReadCloser
var fd *os.File
var err error
@@ -216,7 +216,7 @@ func (self *Dropbox) DownloadToFileAES(key []byte, src, dst, rev string) error {
}
defer fd.Close()
if input, err = self.DownloadAES(key, src, rev, 0); err != nil {
if input, err = db.DownloadAES(key, src, rev, 0); err != nil {
os.Remove(dst)
return err
}