57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
package utils
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import (
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"crypto/rsa"
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"crypto/x509"
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"encoding/pem"
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"io/ioutil"
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"errors"
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"crypto/rand"
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)
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const (
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InvalidPrivateKeyFileError = Error("InvalidPrivateKeyFileError")
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RICOCHET_KEY_SIZE = 1024
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)
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// Generate a private key for use
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func GeneratePrivateKey() (*rsa.PrivateKey, error) {
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privateKey, err := rsa.GenerateKey(rand.Reader, RICOCHET_KEY_SIZE)
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if err != nil {
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return nil, errors.New("Could not generate key: " + err.Error())
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}
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privateKeyDer := x509.MarshalPKCS1PrivateKey(privateKey)
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return x509.ParsePKCS1PrivateKey(privateKeyDer)
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}
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// LoadPrivateKeyFromFile loads a private key from a file...
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func LoadPrivateKeyFromFile(filename string) (*rsa.PrivateKey, error) {
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pemData, err := ioutil.ReadFile(filename)
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if err != nil {
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return nil, err
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}
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return ParsePrivateKey(pemData)
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}
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// Convert a private key string to a usable private key
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func ParsePrivateKey(pemData []byte) (*rsa.PrivateKey, error) {
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block, _ := pem.Decode(pemData)
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if block == nil || block.Type != "RSA PRIVATE KEY" {
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return nil, InvalidPrivateKeyFileError
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}
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return x509.ParsePKCS1PrivateKey(block.Bytes)
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}
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// turn a private key into storable string
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func PrivateKeyToString(privateKey *rsa.PrivateKey) string {
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privateKeyBlock := pem.Block{
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Type: "RSA PRIVATE KEY",
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Headers: nil,
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Bytes: x509.MarshalPKCS1PrivateKey(privateKey),
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}
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return string(pem.EncodeToMemory(&privateKeyBlock))
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}
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