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package utils
import (
"bytes"
"crypto/sha256"
"crypto/sha512"
"crypto/tls"
"fmt"
"io"
"net/http"
"net/url"
"os"
"strings"
"github.com/endophage/gotuf/data"
)
func Download(url url.URL) (*http.Response, error) {
tr := &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
}
client := &http.Client{Transport: tr}
return client.Get(url.String())
}
func Upload(url string, body io.Reader) (*http.Response, error) {
tr := &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
}
client := &http.Client{Transport: tr}
return client.Post(url, "application/json", body)
}
func ValidateTarget(r io.Reader, m *data.FileMeta) error {
h := sha256.New()
length, err := io.Copy(h, r)
if err != nil {
return err
}
if length != m.Length {
return fmt.Errorf("Size of downloaded target did not match targets entry.\nExpected: %s\nReceived: %s\n", m.Length, length)
}
hashDigest := h.Sum(nil)
if bytes.Compare(m.Hashes["sha256"], hashDigest[:]) != 0 {
return fmt.Errorf("Hash of downloaded target did not match targets entry.\nExpected: %x\nReceived: %x\n", m.Hashes["sha256"], hashDigest)
}
return nil
}
func StrSliceContains(ss []string, s string) bool {
for _, v := range ss {
if v == s {
return true
}
}
return false
}
func StrSliceContainsI(ss []string, s string) bool {
s = strings.ToLower(s)
for _, v := range ss {
v = strings.ToLower(v)
if v == s {
return true
}
}
return false
}
func FileExists(path string) bool {
_, err := os.Stat(path)
return os.IsNotExist(err)
}
type NoopCloser struct {
io.Reader
}
func (nc *NoopCloser) Close() error {
return nil
}
func DoHash(alg string, d []byte) []byte {
switch alg {
case "sha256":
digest := sha256.Sum256(d)
return digest[:]
case "sha512":
digest := sha512.Sum512(d)
return digest[:]
}
return nil
}
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