//generateHashcode gets hashcode of the code under path. If path is a HTTP(s) url
//it downloads the code first to compute the hash.
//NOTE: for dev mode, user builds and runs chaincode manually. The name provided
//by the user is equivalent to the path. This method will treat the name
//as codebytes and compute the hash from it. ie, user cannot run the chaincode
//with the same (name, ctor, args)
func generateHashcode(spec *pb.ChaincodeSpec, path string) (string, error) {
ctor := spec.CtorMsg
if ctor == nil || ctor.Function == "" {
return "", fmt.Errorf("Cannot generate hashcode from empty ctor")
}
hash := util.GenerateHashFromSignature(spec.ChaincodeID.Path, ctor.Function, ctor.Args)
buf, err := ioutil.ReadFile(path)
if err != nil {
return "", fmt.Errorf("Error reading file: %s", err)
}
newSlice := make([]byte, len(hash)+len(buf))
copy(newSlice[len(buf):], hash[:])
//hash = md5.Sum(newSlice)
hash = util.ComputeCryptoHash(newSlice)
return hex.EncodeToString(hash[:]), nil
}
//generateHashcode gets hashcode of the code under path. If path is a HTTP(s) url
//it downloads the code first to compute the hash.
//NOTE: for dev mode, user builds and runs chaincode manually. The name provided
//by the user is equivalent to the path. This method will treat the name
//as codebytes and compute the hash from it. ie, user cannot run the chaincode
//with the same (name, ctor, args)
func generateHashcode(spec *pb.ChaincodeSpec, tw *tar.Writer) (string, error) {
if spec == nil {
return "", fmt.Errorf("Cannot generate hashcode from nil spec")
}
chaincodeID := spec.ChaincodeID
if chaincodeID == nil || chaincodeID.Path == "" {
return "", fmt.Errorf("Cannot generate hashcode from empty chaincode path")
}
ctor := spec.CtorMsg
if ctor == nil || ctor.Function == "" {
return "", fmt.Errorf("Cannot generate hashcode from empty ctor")
}
//code root will point to the directory where the code exists
//in the case of http it will be a temporary dir that
//will have to be deleted
var codegopath string
var ishttp bool
defer func() {
if ishttp && codegopath != "" {
os.RemoveAll(codegopath)
}
}()
path := chaincodeID.Path
var err error
var actualcodepath string
if strings.HasPrefix(path, "http://") {
ishttp = true
actualcodepath = path[7:]
codegopath, err = getCodeFromHTTP(actualcodepath)
} else if strings.HasPrefix(path, "https://") {
ishttp = true
actualcodepath = path[8:]
codegopath, err = getCodeFromHTTP(actualcodepath)
} else {
actualcodepath = path
codegopath, err = getCodeFromFS(path)
}
if err != nil {
return "", fmt.Errorf("Error getting code %s", err)
}
tmppath := codegopath + "/src/" + actualcodepath
if err = isCodeExist(tmppath); err != nil {
return "", fmt.Errorf("code does not exist %s", err)
}
hash := util.GenerateHashFromSignature(actualcodepath, ctor.Function, ctor.Args)
hash, err = hashFilesInDir(codegopath+"/src/", actualcodepath, hash, tw)
if err != nil {
return "", fmt.Errorf("Could not get hashcode for %s - %s\n", path, err)
}
return hex.EncodeToString(hash[:]), nil
}
//generateHashcode gets hashcode of the code under path. If path is a HTTP(s) url
//it downloads the code first to compute the hash.
//NOTE: for dev mode, user builds and runs chaincode manually. The name provided
//by the user is equivalent to the path. This method will treat the name
//as codebytes and compute the hash from it. ie, user cannot run the chaincode
//with the same (name, ctor, args)
func generateHashcode(spec *pb.ChaincodeSpec, tw *tar.Writer) (string, error) {
if spec == nil {
return "", fmt.Errorf("Cannot generate hashcode from nil spec")
}
chaincodeID := spec.ChaincodeID
if chaincodeID == nil || chaincodeID.Path == "" {
return "", fmt.Errorf("Cannot generate hashcode from empty chaincode path")
}
ctor := spec.CtorMsg
if ctor == nil || len(ctor.Args) == 0 {
return "", fmt.Errorf("Cannot generate hashcode from empty ctor")
}
codepath := chaincodeID.Path
var ishttp bool
defer func() {
if ishttp {
os.RemoveAll(codepath)
}
}()
var err error
if strings.HasPrefix(codepath, "http://") ||
strings.HasPrefix(codepath, "https://") {
ishttp = true
codepath, err = getCodeFromHTTP(codepath)
} else if !strings.HasPrefix(codepath, "/") {
wd := ""
wd, err = os.Getwd()
codepath = wd + "/" + codepath
}
if err != nil {
return "", fmt.Errorf("Error getting code %s", err)
}
if err = isCodeExist(codepath); err != nil {
return "", fmt.Errorf("code does not exist %s", err)
}
root := codepath
if strings.LastIndex(root, "/") == len(root)-1 {
root = root[:len(root)-1]
}
root = root[:strings.LastIndex(root, "/")+1]
ctorbytes, err := proto.Marshal(ctor)
if err != nil {
return "", fmt.Errorf("Error marshalling constructor: %s", err)
}
hash := util.GenerateHashFromSignature(codepath, ctorbytes)
hash, err = hashFilesInDir(root, codepath, hash, tw)
if err != nil {
return "", fmt.Errorf("Could not get hashcode for %s - %s\n", codepath, err)
}
return hex.EncodeToString(hash[:]), nil
}
