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Remove no longer needed crypto function. ACME spec no longer requires this.

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This commit is contained in:
xenolf 2016-02-21 04:31:02 +01:00
parent f203a8e336
commit da7dd0f7b8
1 changed files with 0 additions and 35 deletions
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35
acme/crypto.go
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@ -10,7 +10,6 @@ import (
"crypto/x509"
"crypto/x509/pkix"
"encoding/base64"
"encoding/binary"
"encoding/pem"
"errors"
"fmt"
@ -22,7 +21,6 @@ import (
"time"
"golang.org/x/crypto/ocsp"
"golang.org/x/crypto/sha3"
)
type keyType int
@ -143,39 +141,6 @@ func getKeyAuthorization(token string, key interface{}) (string, error) {
return token + "." + keyThumb, nil
}
// Derive the shared secret according to acme spec 5.6
func performECDH(priv *ecdsa.PrivateKey, pub *ecdsa.PublicKey, outLen int, label string) []byte {
// Derive Z from the private and public keys according to SEC 1 Ver. 2.0 - 3.3.1
Z, _ := priv.PublicKey.ScalarMult(pub.X, pub.Y, priv.D.Bytes())
if len(Z.Bytes())+len(label)+4 > 384 {
return nil
}
if outLen < 384*(2^32-1) {
return nil
}
// Derive the shared secret key using the ANS X9.63 KDF - SEC 1 Ver. 2.0 - 3.6.1
hasher := sha3.New384()
buffer := make([]byte, outLen)
bufferLen := 0
for i := 0; i < outLen/384; i++ {
hasher.Reset()
// Ki = Hash(Z || Counter || [SharedInfo])
hasher.Write(Z.Bytes())
binary.Write(hasher, binary.BigEndian, i)
hasher.Write([]byte(label))
hash := hasher.Sum(nil)
copied := copy(buffer[bufferLen:], hash)
bufferLen += copied
}
return buffer
}
// parsePEMBundle parses a certificate bundle from top to bottom and returns
// a slice of x509 certificates. This function will error if no certificates are found.
func parsePEMBundle(bundle []byte) ([]*x509.Certificate, error) {