54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
package tools
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import (
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"bytes"
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"crypto/sha1"
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"encoding/base64"
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"fmt"
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"math/rand"
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)
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// code from https://gist.github.com/newm4n/ce9ac4308ae1beb4250efddad28e3f85
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// Encode encodes the []byte of raw password
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func EncodePass(rawPassPhrase []byte) string {
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hash := makeSSHAHash(rawPassPhrase, makeSalt())
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b64 := base64.StdEncoding.EncodeToString(hash)
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return string([]byte(fmt.Sprintf("{SSHA}%s", b64)))
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}
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// makeSalt make a 4 byte array containing random bytes.
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func makeSalt() []byte {
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sbytes := make([]byte, 4)
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rand.Read(sbytes)
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return sbytes
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}
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// makeSSHAHash make hasing using SHA-1 with salt. This is not the final output though. You need to append {SSHA} string with base64 of this hash.
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func makeSSHAHash(passphrase, salt []byte) []byte {
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sha := sha1.New()
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sha.Write(passphrase)
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sha.Write(salt)
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h := sha.Sum(nil)
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return append(h, salt...)
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}
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// Matches matches the encoded password and the raw password
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func Matches(encodedPassPhrase, rawPassPhrase []byte) bool {
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//strip the {SSHA}
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eppS := string(encodedPassPhrase)[6:]
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hash, err := base64.StdEncoding.DecodeString(eppS)
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if err != nil {
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return false
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}
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salt := hash[len(hash)-4:]
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sha := sha1.New()
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sha.Write(rawPassPhrase)
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sha.Write(salt)
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sum := sha.Sum(nil)
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return bytes.Equal(sum, hash[:len(hash)-4])
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}
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