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lego/cli.go

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// Let's Encrypt client to go!
// CLI application for generating Let's Encrypt certificates using the ACME package.
package main
import (
"fmt"
"os"
"path/filepath"
"text/tabwriter"
"github.com/urfave/cli"
"github.com/xenolf/lego/acme"
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"github.com/xenolf/lego/log"
)
var (
version = "dev"
)
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func main() {
app := cli.NewApp()
app.Name = "lego"
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app.Usage = "Let's Encrypt client written in Go"
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app.Version = version
acme.UserAgent = "lego/" + app.Version
defaultPath := ""
cwd, err := os.Getwd()
if err == nil {
defaultPath = filepath.Join(cwd, ".lego")
}
app.Before = func(c *cli.Context) error {
if c.GlobalString("path") == "" {
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log.Fatal("Could not determine current working directory. Please pass --path.")
}
return nil
}
app.Commands = []cli.Command{
{
Name: "run",
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Usage: "Register an account, then create and install a certificate",
Action: run,
Flags: []cli.Flag{
cli.BoolFlag{
Name: "no-bundle",
Usage: "Do not create a certificate bundle by adding the issuers certificate to the new certificate.",
},
cli.BoolFlag{
Name: "must-staple",
Usage: "Include the OCSP must staple TLS extension in the CSR and generated certificate. Only works if the CSR is generated by lego.",
},
},
},
{
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Name: "revoke",
Usage: "Revoke a certificate",
Action: revoke,
},
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{
Name: "renew",
Usage: "Renew a certificate",
Action: renew,
Flags: []cli.Flag{
cli.IntFlag{
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Name: "days",
Value: 0,
Usage: "The number of days left on a certificate to renew it.",
},
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cli.BoolFlag{
Name: "reuse-key",
Usage: "Used to indicate you want to reuse your current private key for the new certificate.",
},
cli.BoolFlag{
Name: "no-bundle",
Usage: "Do not create a certificate bundle by adding the issuers certificate to the new certificate.",
},
cli.BoolFlag{
Name: "must-staple",
Usage: "Include the OCSP must staple TLS extension in the CSR and generated certificate. Only works if the CSR is generated by lego.",
},
},
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},
{
Name: "dnshelp",
Usage: "Shows additional help for the --dns global option",
Action: dnshelp,
},
}
app.Flags = []cli.Flag{
cli.StringSliceFlag{
Name: "domains, d",
Usage: "Add a domain to the process. Can be specified multiple times.",
},
cli.StringFlag{
Name: "csr, c",
Usage: "Certificate signing request filename, if an external CSR is to be used",
},
cli.StringFlag{
Name: "server, s",
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Value: "https://acme-v02.api.letsencrypt.org/directory",
Usage: "CA hostname (and optionally :port). The server certificate must be trusted in order to avoid further modifications to the client.",
},
cli.StringFlag{
Name: "email, m",
Usage: "Email used for registration and recovery contact.",
},
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cli.StringFlag{
Name: "filename",
Usage: "Filename of the generated certificate",
},
cli.BoolFlag{
Name: "accept-tos, a",
Usage: "By setting this flag to true you indicate that you accept the current Let's Encrypt terms of service.",
},
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cli.BoolFlag{
Name: "eab",
Usage: "Use External Account Binding for account registration. Requires --kid and --hmac.",
},
cli.StringFlag{
Name: "kid",
Usage: "Key identifier from External CA. Used for External Account Binding.",
},
cli.StringFlag{
Name: "hmac",
Usage: "MAC key from External CA. Should be in Base64 URL Encoding without padding format. Used for External Account Binding.",
},
cli.StringFlag{
Name: "key-type, k",
Value: "rsa2048",
Usage: "Key type to use for private keys. Supported: rsa2048, rsa4096, rsa8192, ec256, ec384",
},
cli.StringFlag{
Name: "path",
Usage: "Directory to use for storing the data",
Value: defaultPath,
},
cli.StringSliceFlag{
Name: "exclude, x",
Usage: "Explicitly disallow solvers by name from being used. Solvers: \"http-01\", \"dns-01\", \"tls-alpn-01\".",
},
cli.StringFlag{
Name: "webroot",
Usage: "Set the webroot folder to use for HTTP based challenges to write directly in a file in .well-known/acme-challenge",
},
cli.StringSliceFlag{
Name: "memcached-host",
Usage: "Set the memcached host(s) to use for HTTP based challenges. Challenges will be written to all specified hosts.",
},
cli.StringFlag{
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Name: "http",
Usage: "Set the port and interface to use for HTTP based challenges to listen on. Supported: interface:port or :port",
},
cli.StringFlag{
Name: "tls",
Usage: "Set the port and interface to use for TLS based challenges to listen on. Supported: interface:port or :port",
},
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cli.StringFlag{
Name: "dns",
Usage: "Solve a DNS challenge using the specified provider. Disables all other challenges. Run 'lego dnshelp' for help on usage.",
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},
cli.IntFlag{
Name: "http-timeout",
Usage: "Set the HTTP timeout value to a specific value in seconds. The default is 10 seconds.",
},
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cli.IntFlag{
Name: "dns-timeout",
Usage: "Set the DNS timeout value to a specific value in seconds. The default is 10 seconds.",
},
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cli.StringSliceFlag{
Name: "dns-resolvers",
Usage: "Set the resolvers to use for performing recursive DNS queries. Supported: host:port. The default is to use the system resolvers, or Google's DNS resolvers if the system's cannot be determined.",
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},
cli.BoolFlag{
Name: "pem",
Usage: "Generate a .pem file by concatanating the .key and .crt files together.",
},
}
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err = app.Run(os.Args)
if err != nil {
log.Fatal(err)
}
}
func dnshelp(c *cli.Context) error {
fmt.Printf(
`Credentials for DNS providers must be passed through environment variables.
Here is an example bash command using the CloudFlare DNS provider:
$ CLOUDFLARE_EMAIL=foo@bar.com \
CLOUDFLARE_API_KEY=b9841238feb177a84330febba8a83208921177bffe733 \
lego --dns cloudflare --domains www.example.com --email me@bar.com run
`)
w := tabwriter.NewWriter(os.Stdout, 0, 8, 1, '\t', 0)
fmt.Fprintln(w, "Valid providers and their associated credential environment variables:")
fmt.Fprintln(w)
fmt.Fprintln(w, "\tacme-dns:\tACME_DNS_API_BASE, ACME_DNS_STORAGE_PATH")
fmt.Fprintln(w, "\talidns:\tALICLOUD_ACCESS_KEY, ALICLOUD_SECRET_KEY")
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fmt.Fprintln(w, "\tazure:\tAZURE_CLIENT_ID, AZURE_CLIENT_SECRET, AZURE_SUBSCRIPTION_ID, AZURE_TENANT_ID, AZURE_RESOURCE_GROUP")
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fmt.Fprintln(w, "\tauroradns:\tAURORA_USER_ID, AURORA_KEY, AURORA_ENDPOINT")
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fmt.Fprintln(w, "\tbluecat:\tBLUECAT_SERVER_URL, BLUECAT_USER_NAME, BLUECAT_PASSWORD, BLUECAT_CONFIG_NAME, BLUECAT_DNS_VIEW")
fmt.Fprintln(w, "\tcloudxns:\tCLOUDXNS_API_KEY, CLOUDXNS_SECRET_KEY")
fmt.Fprintln(w, "\tcloudflare:\tCLOUDFLARE_EMAIL, CLOUDFLARE_API_KEY")
fmt.Fprintln(w, "\tdigitalocean:\tDO_AUTH_TOKEN")
fmt.Fprintln(w, "\tdnsimple:\tDNSIMPLE_EMAIL, DNSIMPLE_OAUTH_TOKEN")
fmt.Fprintln(w, "\tdnsmadeeasy:\tDNSMADEEASY_API_KEY, DNSMADEEASY_API_SECRET")
fmt.Fprintln(w, "\tduckdns:\tDUCKDNS_TOKEN")
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fmt.Fprintln(w, "\texoscale:\tEXOSCALE_API_KEY, EXOSCALE_API_SECRET, EXOSCALE_ENDPOINT")
fmt.Fprintln(w, "\tgandi:\tGANDI_API_KEY")
fmt.Fprintln(w, "\tgandiv5:\tGANDIV5_API_KEY")
fmt.Fprintln(w, "\tgcloud:\tGCE_PROJECT, GCE_SERVICE_ACCOUNT_FILE")
fmt.Fprintln(w, "\tglesys:\tGLESYS_API_USER, GLESYS_API_KEY")
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fmt.Fprintln(w, "\thostingde:\tHOSTINGDE_API_KEY, HOSTINGDE_ZONE_NAME")
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fmt.Fprintln(w, "\tiij:\tIIJ_API_ACCESS_KEY, IIJ_API_SECRET_KEY, IIJ_DO_SERVICE_CODE")
fmt.Fprintln(w, "\tlinode:\tLINODE_API_KEY")
fmt.Fprintln(w, "\tlightsail:\tAWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, DNS_ZONE")
fmt.Fprintln(w, "\tmanual:\tnone")
fmt.Fprintln(w, "\tnamecheap:\tNAMECHEAP_API_USER, NAMECHEAP_API_KEY")
fmt.Fprintln(w, "\tnamedotcom:\tNAMECOM_USERNAME, NAMECOM_API_TOKEN")
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fmt.Fprintln(w, "\tnetcup:\tNETCUP_CUSTOMER_NUMBER, NETCUP_API_KEY, NETCUP_API_PASSWORD")
fmt.Fprintln(w, "\tnifcloud:\tNIFCLOUD_ACCESS_KEY_ID, NIFCLOUD_SECRET_ACCESS_KEY")
fmt.Fprintln(w, "\trackspace:\tRACKSPACE_USER, RACKSPACE_API_KEY")
fmt.Fprintln(w, "\trfc2136:\tRFC2136_TSIG_KEY, RFC2136_TSIG_SECRET,\n\t\tRFC2136_TSIG_ALGORITHM, RFC2136_NAMESERVER")
fmt.Fprintln(w, "\troute53:\tAWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_REGION, AWS_HOSTED_ZONE_ID")
fmt.Fprintln(w, "\tdyn:\tDYN_CUSTOMER_NAME, DYN_USER_NAME, DYN_PASSWORD")
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fmt.Fprintln(w, "\tvegadns:\tSECRET_VEGADNS_KEY, SECRET_VEGADNS_SECRET, VEGADNS_URL")
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fmt.Fprintln(w, "\tvultr:\tVULTR_API_KEY")
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fmt.Fprintln(w, "\tovh:\tOVH_ENDPOINT, OVH_APPLICATION_KEY, OVH_APPLICATION_SECRET, OVH_CONSUMER_KEY")
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fmt.Fprintln(w, "\tpdns:\tPDNS_API_KEY, PDNS_API_URL")
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fmt.Fprintln(w, "\tdnspod:\tDNSPOD_API_KEY")
fmt.Fprintln(w, "\totc:\tOTC_USER_NAME, OTC_PASSWORD, OTC_PROJECT_NAME, OTC_DOMAIN_NAME, OTC_IDENTITY_ENDPOINT")
fmt.Fprintln(w, "\tsakuracloud:\tSAKURACLOUD_ACCESS_TOKEN, SAKURACLOUD_ACCESS_TOKEN_SECRET")
fmt.Fprintln(w, "\texec:\tEXEC_PATH, EXEC_MODE")
w.Flush()
fmt.Println(`
For a more detailed explanation of a DNS provider's credential variables,
please consult their online documentation.`)
return nil
}