From 161abc96c84211c52dd4918b0c8a2396315d2093 Mon Sep 17 00:00:00 2001 From: Knut Ahlers Date: Fri, 16 Aug 2019 23:00:10 +0200 Subject: [PATCH] Initial version --- go.mod | 14 ++++++++++ go.sum | 28 +++++++++++++++++++ main.go | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 127 insertions(+) create mode 100644 go.mod create mode 100644 go.sum create mode 100644 main.go diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..b95fd4c --- /dev/null +++ b/go.mod @@ -0,0 +1,14 @@ +module github.com/Luzifer/sri + +go 1.12 + +require ( + github.com/Luzifer/rconfig/v2 v2.2.1 + github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect + github.com/pkg/errors v0.8.1 + github.com/sirupsen/logrus v1.4.2 + github.com/stretchr/objx v0.2.0 // indirect + github.com/stretchr/testify v1.4.0 // indirect + golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a // indirect + gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..7265960 --- /dev/null +++ b/go.sum @@ -0,0 +1,28 @@ +github.com/Luzifer/rconfig/v2 v2.2.1 h1:zcDdLQlnlzwcBJ8E0WFzOkQE1pCMn3EbX0dFYkeTczg= +github.com/Luzifer/rconfig/v2 v2.2.1/go.mod h1:OKIX0/JRZrPJ/ZXXWklQEFXA6tBfWaljZbW37w+sqBw= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ= +github.com/konsorten/go-windows-terminal-sequences v1.0.2/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ= +github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I= +github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0= +github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= +github.com/sirupsen/logrus v1.4.2 h1:SPIRibHv4MatM3XXNO2BJeFLZwZ2LvZgfQ5+UNI2im4= +github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE= +github.com/spf13/pflag v1.0.3 h1:zPAT6CGy6wXeQ7NtTnaTerfKOsV6V6F8agHXFiazDkg= +github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4= +github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= +github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= +github.com/stretchr/objx v0.2.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoHMkEqE= +github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs= +github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI= +github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4= +golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a h1:aYOabOQFp6Vj6W1F80affTUvO9UxmJRx8K0gsfABByQ= +golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/validator.v2 v2.0.0-20180514200540-135c24b11c19 h1:WB265cn5OpO+hK3pikC9hpP1zI/KTwmyMFKloW9eOVc= +gopkg.in/validator.v2 v2.0.0-20180514200540-135c24b11c19/go.mod h1:o4V0GXN9/CAmCsvJ0oXYZvrZOe7syiDZSN1GWGZTGzc= +gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw= +gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= diff --git a/main.go b/main.go new file mode 100644 index 0000000..8551714 --- /dev/null +++ b/main.go @@ -0,0 +1,85 @@ +package main + +import ( + "crypto/sha512" + "encoding/base64" + "fmt" + "io/ioutil" + "net/http" + "os" + + "github.com/pkg/errors" + log "github.com/sirupsen/logrus" + + "github.com/Luzifer/rconfig/v2" +) + +var ( + cfg = struct { + HTML bool `flag:"html" default:"true" description:"Print HTML tags with SRI information (If disabled just prints the hashes)"` + HTMLTag string `flag:"html-tag" default:"link" description:"Tag to use for HTML mode (supported: link, script)"` + LogLevel string `flag:"log-level" default:"info" description:"Log level (debug, info, warn, error, fatal)"` + VersionAndExit bool `flag:"version" default:"false" description:"Prints current version and exits"` + }{} + + htmlTemplate = map[string]string{ + "link": ``, + "script": ``, + } + + version = "dev" +) + +func init() { + if err := rconfig.ParseAndValidate(&cfg); err != nil { + log.Fatalf("Unable to parse commandline options: %s", err) + } + + if cfg.VersionAndExit { + fmt.Printf("sri %s\n", version) + os.Exit(0) + } + + if l, err := log.ParseLevel(cfg.LogLevel); err != nil { + log.WithError(err).Fatal("Unable to parse log level") + } else { + log.SetLevel(l) + } +} + +func main() { + for _, url := range rconfig.Args()[1:] { + logger := log.WithField("url", url) + logger.Debug("Fetching SRI...") + + hash, err := sriIntegrity(url) + if err != nil { + logger.WithError(err).Error("Unable to fetch SRI hash") + continue + } + + if cfg.HTML { + fmt.Printf(htmlTemplate[cfg.HTMLTag], url, hash) + fmt.Println() + continue + } + + fmt.Printf("%s\t%s\n", url, hash) + } +} + +func sriIntegrity(url string) (string, error) { + resp, err := http.Get(url) + if err != nil { + return "", errors.Wrap(err, "Unable to get URL contents") + } + defer resp.Body.Close() + + payload, err := ioutil.ReadAll(resp.Body) + if err != nil { + return "", errors.Wrap(err, "Unable to read body") + } + + hash := sha512.Sum512(payload) + return "sha512-" + base64.StdEncoding.EncodeToString(hash[:]), nil +}