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Add option to specify key type (RSA or Ed25519) #4076

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Add option to specify key type (RSA or Ed25519) #4076

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be8e8b2
Add option to specify key type (RSA or Ed25519)
JustinDrake Jul 17, 2017
d2ba362
Incorporate review from @Kubuxu
JustinDrake Jul 31, 2017
a881e02
Fix typo spotted by @whyursleeping
JustinDrake Aug 3, 2017
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23 changes: 17 additions & 6 deletions cmd/ipfs/init.go
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Original file line number Diff line number Diff line change
Expand Up @@ -16,10 +16,14 @@ import (
namesys "github.com/ipfs/go-ipfs/namesys"
config "github.com/ipfs/go-ipfs/repo/config"
fsrepo "github.com/ipfs/go-ipfs/repo/fsrepo"

ci "gx/ipfs/QmaPbCnUMBohSGo3KnxEa2bHqyJVVeEEcwtqJAYxerieBo/go-libp2p-crypto"
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Separate local and gx deps with a new line.

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Done 👍

)

// The default keypair is 2048-bit RSA
const (
nBitsForKeypairDefault = 2048
keypairTypeDefault = ci.RSA
)

var initCmd = &cmds.Command{
Expand Down Expand Up @@ -49,6 +53,7 @@ environment variable:
},
Options: []cmds.Option{
cmds.IntOption("bits", "b", "Number of bits to use in the generated RSA private key.").Default(nBitsForKeypairDefault),
cmds.IntOption("key-type", "k", "Key type (RSA or Ed25519-id").Default(keypairTypeDefault),
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appears to be a typo here, missing paren

cmds.BoolOption("empty-repo", "e", "Don't add and pin help files to the local storage.").Default(false),
cmds.StringOption("profile", "p", "Apply profile settings to config. Multiple profiles can be separated by ','"),

Expand Down Expand Up @@ -78,13 +83,19 @@ environment variable:
return
}

empty, _, err := req.Option("e").Bool()
empty, _, err := req.Option("empty-repo").Bool()
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}

nBitsForKeypair, _, err := req.Option("bits").Int()
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}

nBitsForKeypair, _, err := req.Option("b").Int()
keyType, _, err := req.Option("key-type").Int()
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
Expand Down Expand Up @@ -118,7 +129,7 @@ environment variable:
profiles = strings.Split(profile, ",")
}

if err := doInit(os.Stdout, req.InvocContext().ConfigRoot, empty, nBitsForKeypair, profiles, conf); err != nil {
if err := doInit(os.Stdout, req.InvocContext().ConfigRoot, empty, nBitsForKeypair, keyType, profiles, conf); err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
Expand All @@ -130,10 +141,10 @@ Reinitializing would overwrite your keys.
`)

func initWithDefaults(out io.Writer, repoRoot string) error {
return doInit(out, repoRoot, false, nBitsForKeypairDefault, nil, nil)
return doInit(out, repoRoot, false, nBitsForKeypairDefault, keypairTypeDefault, nil, nil)
}

func doInit(out io.Writer, repoRoot string, empty bool, nBitsForKeypair int, confProfiles []string, conf *config.Config) error {
func doInit(out io.Writer, repoRoot string, empty bool, nBitsForKeypair, keyType int, confProfiles []string, conf *config.Config) error {
if _, err := fmt.Fprintf(out, "initializing IPFS node at %s\n", repoRoot); err != nil {
return err
}
Expand All @@ -148,7 +159,7 @@ func doInit(out io.Writer, repoRoot string, empty bool, nBitsForKeypair int, con

if conf == nil {
var err error
conf, err = config.Init(out, nBitsForKeypair)
conf, err = config.Init(out, nBitsForKeypair, keyType)
if err != nil {
return err
}
Expand Down
21 changes: 14 additions & 7 deletions repo/config/init.go
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Original file line number Diff line number Diff line change
Expand Up @@ -10,8 +10,8 @@ import (
ci "gx/ipfs/QmaPbCnUMBohSGo3KnxEa2bHqyJVVeEEcwtqJAYxerieBo/go-libp2p-crypto"
)

func Init(out io.Writer, nBitsForKeypair int) (*Config, error) {
identity, err := identityConfig(out, nBitsForKeypair)
func Init(out io.Writer, nBitsForKeypair, keyType int) (*Config, error) {
identity, err := identityConfig(out, nBitsForKeypair, keyType)
if err != nil {
return nil, err
}
Expand Down Expand Up @@ -93,15 +93,22 @@ func datastoreConfig() (Datastore, error) {
}

// identityConfig initializes a new identity.
func identityConfig(out io.Writer, nbits int) (Identity, error) {
func identityConfig(out io.Writer, nbits, keyType int) (Identity, error) {
// TODO guard higher up
ident := Identity{}
if nbits < 1024 {
return ident, errors.New("Bitsize less than 1024 is considered unsafe.")

switch keyType {
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So what happens here if the user passed an incorrect key type?
I don't see the user option validated anywhere, it's just an int.

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Basically you need a default handler that errors out with something helpful for the user.

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Incorrect key type options will error out on line 113 with sk, pk, err := ci.GenerateKeyPair(keyType, nbits).

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It's a little inconsistent with the intent of the switch, and, more importantly, there are other valid key types supported by libp2p-crypto that we don't use yet in ipfs (eg secp256k1 keys).

So I think it's better to tell the user we are not ready to handle this type of key rather than fallthrough and possibly succeed with surprising results.

case ci.RSA:
if nbits < 1024 {
return ident, errors.New("Bitsize less than 1024 is considered unsafe for RSA.")
}

fmt.Fprintf(out, "generating %v-bit RSA keypair...", nbits)
case ci.Ed25519:
fmt.Fprintf(out, "generating Ed25519 keypair...")
}

fmt.Fprintf(out, "generating %v-bit RSA keypair...", nbits)
sk, pk, err := ci.GenerateKeyPair(ci.RSA, nbits)
sk, pk, err := ci.GenerateKeyPair(keyType, nbits)
if err != nil {
return ident, err
}
Expand Down