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105 lines
2.1 KiB
Go
105 lines
2.1 KiB
Go
package crypto
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import (
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"crypto"
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"crypto/rand"
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"crypto/rsa"
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"crypto/sha256"
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"crypto/x509"
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"errors"
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"github.com/jbenet/go-ipfs/Godeps/_workspace/src/code.google.com/p/goprotobuf/proto"
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)
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type RsaPrivateKey struct {
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k *rsa.PrivateKey
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}
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type RsaPublicKey struct {
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k *rsa.PublicKey
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}
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func (pk *RsaPublicKey) Verify(data, sig []byte) (bool, error) {
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hashed := sha256.Sum256(data)
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err := rsa.VerifyPKCS1v15(pk.k, crypto.SHA256, hashed[:], sig)
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if err != nil {
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return false, err
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}
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return true, nil
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}
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func (pk *RsaPublicKey) Bytes() ([]byte, error) {
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b, err := x509.MarshalPKIXPublicKey(pk.k)
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if err != nil {
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return nil, err
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}
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pbmes := new(PBPublicKey)
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typ := KeyType_RSA
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pbmes.Type = &typ
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pbmes.Data = b
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return proto.Marshal(pbmes)
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}
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// Equals checks whether this key is equal to another
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func (pk *RsaPublicKey) Equals(k Key) bool {
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return KeyEqual(pk, k)
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}
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func (pk *RsaPublicKey) Hash() ([]byte, error) {
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return KeyHash(pk)
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}
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func (sk *RsaPrivateKey) GenSecret() []byte {
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buf := make([]byte, 16)
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rand.Read(buf)
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return buf
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}
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func (sk *RsaPrivateKey) Sign(message []byte) ([]byte, error) {
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hashed := sha256.Sum256(message)
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return rsa.SignPKCS1v15(rand.Reader, sk.k, crypto.SHA256, hashed[:])
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}
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func (sk *RsaPrivateKey) GetPublic() PubKey {
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return &RsaPublicKey{&sk.k.PublicKey}
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}
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func (sk *RsaPrivateKey) Bytes() ([]byte, error) {
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b := x509.MarshalPKCS1PrivateKey(sk.k)
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pbmes := new(PBPrivateKey)
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typ := KeyType_RSA
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pbmes.Type = &typ
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pbmes.Data = b
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return proto.Marshal(pbmes)
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}
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// Equals checks whether this key is equal to another
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func (sk *RsaPrivateKey) Equals(k Key) bool {
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return KeyEqual(sk, k)
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}
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func (sk *RsaPrivateKey) Hash() ([]byte, error) {
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return KeyHash(sk)
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}
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func UnmarshalRsaPrivateKey(b []byte) (*RsaPrivateKey, error) {
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sk, err := x509.ParsePKCS1PrivateKey(b)
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if err != nil {
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return nil, err
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}
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return &RsaPrivateKey{sk}, nil
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}
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func UnmarshalRsaPublicKey(b []byte) (*RsaPublicKey, error) {
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pub, err := x509.ParsePKIXPublicKey(b)
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if err != nil {
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return nil, err
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}
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pk, ok := pub.(*rsa.PublicKey)
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if !ok {
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return nil, errors.New("Not actually an rsa public key.")
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}
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return &RsaPublicKey{pk}, nil
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}
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