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Use Go's openpgp implementation to symmetrically encrypt a file, possibly with compression.
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symmetric-encrypt | |
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package main | |
import ( | |
"code.google.com/p/go.crypto/openpgp" | |
"code.google.com/p/go.crypto/openpgp/packet" | |
"flag" | |
"fmt" | |
"io" | |
"os" | |
"path/filepath" | |
"runtime" | |
"time" | |
) | |
var pp = "ithai5Phieth" | |
var input string | |
var z int | |
var algo string | |
var algo_ packet.CompressionAlgo | |
func init() { | |
flag.StringVar(&input, "input", "", "Input file (- means Stdin)") | |
flag.StringVar(&algo, "compress-algo", "zip", | |
"Compression Algorithm - none, zip or zlib") | |
flag.IntVar(&z, "z", packet.DefaultCompression, | |
"Compression level") | |
} | |
func main() { | |
runtime.GOMAXPROCS(runtime.NumCPU() * 2) | |
flag.Parse() | |
switch algo { | |
case "none": | |
algo_ = packet.CompressionNone | |
case "zip": | |
algo_ = packet.CompressionZIP | |
case "zlib": | |
algo_ = packet.CompressionZLIB | |
default: | |
fmt.Fprintf(os.Stderr, | |
"ERROR: Unknown compression algo %s\n", algo) | |
os.Exit(1) | |
} | |
var r io.Reader | |
var filenameHint string | |
var modtimeHint time.Time | |
if input == "" || input == "-" { | |
r = os.Stdin | |
} else { | |
file, err := os.Open(input) | |
if err != nil { | |
fmt.Fprintln(os.Stderr, "ERROR:", err) | |
os.Exit(1) | |
} | |
defer file.Close() | |
filenameHint = filepath.Base(input) | |
fi, err := os.Stat(input) | |
if err != nil { | |
fmt.Fprintln(os.Stderr, "ERROR:", err) | |
os.Exit(1) | |
} | |
modtimeHint = fi.ModTime() | |
r = file | |
} | |
hints := &openpgp.FileHints{IsBinary: true, FileName: filenameHint, ModTime: modtimeHint} | |
var config *packet.Config | |
if algo_ != packet.CompressionNone { | |
config = &packet.Config{DefaultCompressionAlgo: algo_, | |
CompressionConfig: &packet.CompressionConfig{z}} | |
} | |
w := os.Stdout | |
plaintext, err := openpgp.SymmetricallyEncrypt(w, []byte(pp), hints, | |
config) | |
if err != nil { | |
fmt.Fprintln(os.Stderr, "ERROR:", err) | |
os.Exit(1) | |
} | |
_, err = io.Copy(plaintext, r) | |
if err != nil { | |
fmt.Fprintf(os.Stderr, "ERROR:", err) | |
os.Exit(1) | |
} | |
plaintext.Close() | |
} |
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