I need to read in an RSA private key from a file to sign a JWT. I am using the openssl to generate a private key. When decrypting the private key getting length too large error
openssl genrsa -des3 -out jwt-private.pem 2048
func main() {
penbhytes := `-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,A30B805A7CC6454D
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-----END RSA PRIVATE KEY-----`
//using below code to decrypt the private key
data, _ := pem.Decode([]byte(pembytes))
privateKeyImported, err := x509.ParsePKCS1PrivateKey(data.Bytes)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}
Getting error as length too large
The key says it's encrypted, Proc-Type: 4,ENCRYPTED
so you must first decrypt it with the password you entered when generating the key.
data, _ := pem.Decode([]byte(pembytes))
if data == nil {
log.Fatalf("bad key data, not PEM-encoded?")
}
pemBytes, err := x509.DecryptPEMBlock(data, []byte("somePassword"))
if err != nil {
log.Fatalf("failed to decrypt block: %v", err)
}
privateKeyImported, err := x509.ParsePKCS1PrivateKey(pemBytes)
if err != nil {
log.Fatalf("failed to parse private key: %v", err)
}
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