func makeHash(name string) hash.Hash {
switch strings.ToLower(name) {
case "ripemd160":
return ripemd160.New()
case "md4":
return md4.New()
case "md5":
return md5.New()
case "sha1":
return sha1.New()
case "sha256":
return sha256.New()
case "sha384":
return sha512.New384()
case "sha3-224":
return sha3.New224()
case "sha3-256":
return sha3.New256()
case "sha3-384":
return sha3.New384()
case "sha3-512":
return sha3.New512()
case "sha512":
return sha512.New()
case "sha512-224":
return sha512.New512_224()
case "sha512-256":
return sha512.New512_256()
case "crc32-ieee":
return crc32.NewIEEE()
case "crc64-iso":
return crc64.New(crc64.MakeTable(crc64.ISO))
case "crc64-ecma":
return crc64.New(crc64.MakeTable(crc64.ECMA))
case "adler32":
return adler32.New()
case "fnv32":
return fnv.New32()
case "fnv32a":
return fnv.New32a()
case "fnv64":
return fnv.New64()
case "fnv64a":
return fnv.New64a()
case "xor8":
return new(xor8)
case "fletch16":
return &fletch16{}
}
return nil
}
func calculateDigest(files []string, algorithm string) {
var hasher hash.Hash
switch algorithm {
case "md5":
hasher = md5.New()
case "sha1":
hasher = sha1.New()
case "sha224":
hasher = sha256.New224()
case "sha256":
hasher = sha256.New()
case "sha384":
hasher = sha512.New384()
case "sha512":
hasher = sha512.New()
case "sha512224":
hasher = sha512.New512_224()
case "sha512256":
hasher = sha512.New512_256()
case "ripemd160":
hasher = ripemd160.New()
default:
fmt.Printf("Algorithm %s not implemented yet\n", algorithm)
os.Exit(1)
}
for _, fn := range files {
hasher.Reset()
file, err := os.Open(fn)
if err != nil {
panic(err.Error())
}
if _, err := io.Copy(hasher, file); err != nil {
panic(err.Error())
}
fmt.Printf("%x %s\n", hasher.Sum(nil), fn)
file.Close()
}
}
func (this HashFile) Exec(input types.Value) (out types.Value, err error) {
var inputMap types.Map
if i, ok := input.(types.Map); ok {
inputMap = i
} else {
err = errors.New(fmt.Sprintf("expected a map as input, got a %T", input))
return
}
var hashName string
var hashNameElement = inputMap[types.Keyword("hash")]
if hashNameElement == nil {
hashName = "sha256"
} else if h, ok := hashNameElement.(types.String); ok {
hashName = string(h)
} else if k, ok := hashNameElement.(types.Keyword); ok {
hashName = string(k)
} else if s, ok := hashNameElement.(types.Symbol); ok {
hashName = string(s)
} else {
err = errors.New(":hash must be a string, keyword, or symbol if specified")
return
}
hashName = strings.ToLower(hashName)
var hash hash.Hash
if hashName == "md5" {
hash = md5.New()
} else if hashName == "sha" || hashName == "sha1" || hashName == "sha-1" {
hash = sha1.New()
} else if hashName == "sha224" || hashName == "sha-224" {
hash = sha256.New224()
} else if hashName == "sha256" || hashName == "sha-256" {
hash = sha256.New()
} else if hashName == "sha384" || hashName == "sha-384" {
hash = sha512.New384()
} else if hashName == "sha512/224" || hashName == "sha-512/224" {
hash = sha512.New512_224()
} else if hashName == "sha512/256" || hashName == "sha-512/256" {
hash = sha512.New512_256()
} else if hashName == "sha512" || hashName == "sha-512" {
hash = sha512.New()
} else {
err = errors.New(fmt.Sprint("unknown hash name: ", hashName))
return
}
var fileName string
var fileElem = inputMap[types.Keyword("file")]
if fileElem == nil {
err = errors.New(":file argument is required")
return
} else if f, ok := fileElem.(types.String); ok {
fileName = string(f)
} else {
err = errors.New(":file argument must be a string")
return
}
file, err := os.Open(fileName)
if err != nil {
return
}
hashOut := bufio.NewWriterSize(hash, hash.BlockSize())
wrote, err := io.Copy(hashOut, file)
hashOut.Flush()
if err != nil {
return
}
out = types.Map{
types.Keyword("success"): types.Bool(true),
types.Keyword("size"): types.Int(wrote),
types.Keyword("file"): types.String(fileName),
types.Keyword("hash"): types.Keyword(hashName),
types.Keyword("digest"): types.String(fmt.Sprintf("%x", hash.Sum(nil))),
}
return
}
