openpgp: crash in signatureWriter.Write #2805
Description
by shazled:
What steps will reproduce the problem?
package main
import (
"bytes"
"code.google.com/p/go.crypto/openpgp"
"crypto/rand"
"log"
"time"
)
func main() {
// Create new entities
entity1, err := openpgp.NewEntity(rand.Reader, time.Now(),
"Test user 1", "test1", "test1@localhost")
if err != nil {
log.Fatal("Cannot create new PGP entity", err)
}
println("Entity can sign? ", entity1.PrimaryKey.CanSign())
entity2, err := openpgp.NewEntity(rand.Reader, time.Now(),
"Test user 2", "test2", "test2@localhost")
if err != nil {
log.Fatal("Cannot create new PGP entity", err)
}
// The buffer that holds the encrypted message
encrypted := new(bytes.Buffer)
// The message to encrypt
content := "The quick brown fox"
// Setup encryption
enc, err := openpgp.Encrypt(encrypted, []*openpgp.Entity{entity2}, entity1, nil)
if err != nil {
log.Fatal("Encryption setup: ", err)
}
// Encrypt
_, err = enc.Write([]byte(content))
if err != nil {
log.Fatal("Encryption: ", err)
}
// Indicate that this is the end of the message
enc.Close()
println(encrypted.String())
}
What is the expected output?
A PGP encrypted buffer
What do you see instead?
Entity can sign? true
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x24 pc=0x80606b9]
goroutine 1 [running]:
code.google.com/p/go.crypto/openpgp.signatureWriter.Write(0x1867e120, 0x18679eb0,
0x1867e200, 0x18679ee0, 0x9, ...)
/home/saul/go/src/pkg/code.google.com/p/go.crypto/openpgp/write.go:277 +0x45
code.google.com/p/go.crypto/openpgp.(*signatureWriter).Write(0x1867e060, 0x1867e080,
0x13, 0x13, 0x13, ...)
/home/saul/go/src/pkg/code.google.com/p/go.crypto/openpgp/canonical_text.go:0 +0x72
main.main()
/home/saul/play/auricular-go/bug.go:42 +0x435
Which compiler are you using (5g, 6g, 8g, gccgo)?
6g, 8g
Which operating system are you using?
Fedora 16 (Linux), Mint XFCE (Linux)
Which revision are you using? (hg identify)
f4b96aaf712d tip
Please provide any additional information below.
If an entity isn't used to sign the encryption is successful.
Attachments:
- bug.go (1060 bytes)