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Validate user provided hostnames do not contain any illegal characters #128

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merged 4 commits into from
Oct 29, 2021
Merged

Validate user provided hostnames do not contain any illegal characters #128

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17c4197
Add valid hostname checks for provided hostnames
YrrepNoj Oct 27, 2021
3f20e24
Add e2e test to check for failure when given bad hostname
YrrepNoj Oct 27, 2021
9a3927e
Remove default hostname when regenerating pki and changed to a prompt
YrrepNoj Oct 27, 2021
96ad933
Add e2e test for underscore in hostname
YrrepNoj Oct 29, 2021
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6 changes: 5 additions & 1 deletion cli/cmd/initialize.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4,8 +4,10 @@ import (
"path/filepath"

"github.com/defenseunicorns/zarf/cli/internal/k3s"
"github.com/defenseunicorns/zarf/cli/internal/utils"

"github.com/AlecAivazis/survey/v2"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)

Expand All @@ -23,7 +25,6 @@ var initCmd = &cobra.Command{
}

func handleTLSOptions() {

// Check to see if the certpaths or host entries are set as flags first
if initOptions.PKI.CertPublicPath == "" && initOptions.PKI.Host == "" {

Expand Down Expand Up @@ -63,6 +64,9 @@ func handleTLSOptions() {
_ = survey.AskOne(prompt, &initOptions.PKI.CertPrivatePath, survey.WithValidator(survey.Required))
}
}
if !utils.CheckHostName(initOptions.PKI.Host) {
logrus.Fatalf("The hostname provided (%v) was not a valid hostname. The hostname can only contain: 'a-z', 'A-Z', '0-9', '-', and '.' characters.\n", initOptions.PKI.Host)
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I thought about passing the regex into the error message but I decided against it in favor of the simple can only contain ... Since Zarf is a tool to simplify setting up clusters/packages some of the people might not be technical enough to decode a regex (I had to use an online tool just to double check it was doing what I though) and I wanted the error message to be simple but clear.

Any other opinions on what might be better?

}
}

func init() {
Expand Down
18 changes: 16 additions & 2 deletions cli/cmd/pki.go
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Original file line number Diff line number Diff line change
@@ -1,7 +1,9 @@
package cmd

import (
"github.com/AlecAivazis/survey/v2"
"github.com/defenseunicorns/zarf/cli/internal/utils"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)

Expand All @@ -16,6 +18,19 @@ var pkiRegenerate = &cobra.Command{
Use: "regenerate",
Short: "Regenerate the pki certs for the cluster ingress",
Run: func(cmd *cobra.Command, args []string) {
// Prompt for a hostname if it wasn't provided as a command flag
if pkiOptions.Host == "" {
prompt := &survey.Input{
Message: "Enter a host DNS entry or IP Address for the gitops service ingress",
}
_ = survey.AskOne(prompt, &pkiOptions.Host, survey.WithValidator(survey.Required))
}

// Verify the hostname provided is valid
if !utils.CheckHostName(pkiOptions.Host) {
logrus.Fatalf("The hostname provided (%v) was not a valid hostname. The hostname can only contain: 'a-z', 'A-Z', '0-9', '-', and '.' characters.\n", pkiOptions.Host)
}

utils.GeneratePKI(pkiOptions)
},
}
Expand All @@ -33,8 +48,7 @@ func init() {
pkiCmd.AddCommand(pkiRegenerate)
pkiCmd.AddCommand(pkiImport)

pkiRegenerate.Flags().StringVar(&pkiOptions.Host, "host", "zarf-server", "Specify the host or IP for the gitops service ingress")
_ = pkiRegenerate.MarkFlagRequired("host")
pkiRegenerate.Flags().StringVar(&pkiOptions.Host, "host", "", "Specify the host or IP for the gitops service ingress")

pkiImport.Flags().StringVar(&pkiOptions.CertPublicPath, "server-crt", "", "Path to the server public key if not generating unique PKI")
pkiImport.Flags().StringVar(&pkiOptions.CertPrivatePath, "server-key", "", "Path to the server private key if not generating unique PKI")
Expand Down
6 changes: 6 additions & 0 deletions test/e2e/e2e_general_cli_test.go
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Expand Up @@ -83,4 +83,10 @@ func testGeneralCliStuff(t *testing.T, terraformOptions *terraform.Options, keyP
// Test for expected failure when given a bad component input
output, err = ssh.CheckSshCommandE(t, publicHost, fmt.Sprintf("cd /home/%s/build && ./zarf init --components management,foo,logging", username))
require.Error(t, err, output)

// Test for expected failure when given invalid hostnames
output, err = ssh.CheckSshCommandE(t, publicHost, fmt.Sprintf("cd /home/%s/build && ./zarf init --host bad!hostname", username))
require.Error(t, err, output)
output, err = ssh.CheckSshCommandE(t, publicHost, fmt.Sprintf("cd /home/%s/build && ./zarf pki regenerate --host zarf@server", username))
require.Error(t, err, output)
}