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//package Rsa provides helpers for creating rsa leys
package Rsa
import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
)
// ReadPrivate loads rsa.PrivateKey from PKCS1 or PKCS8 blobs
func ReadPrivate(raw []byte) (key *rsa.PrivateKey,err error) {
var encoded *pem.Block
if encoded, _ = pem.Decode(raw); encoded == nil {
return nil, errors.New("Rsa.NewPrivate(): Key must be PEM encoded PKCS1 or PKCS8 private key")
}
var parsedKey interface{}
if parsedKey,err=x509.ParsePKCS1PrivateKey(encoded.Bytes);err!=nil {
if parsedKey, err = x509.ParsePKCS8PrivateKey(encoded.Bytes);err!=nil {
return nil,err
}
}
var ok bool
if key,ok=parsedKey.(*rsa.PrivateKey);!ok {
return nil, errors.New("Rsa.NewPrivate(): Key is not valid *rsa.PrivateKey")
}
return key,nil
}
// ReadPublic loads rsa.PublicKey from PKIX or PKCS1 X509 blobs
func ReadPublic(raw []byte) (key *rsa.PublicKey,err error) {
var encoded *pem.Block
if encoded, _ = pem.Decode(raw); encoded == nil {
return nil, errors.New("Rsa.NewPublic(): Key must be PEM encoded PKCS1 X509 certificate or PKIX public key")
}
var parsedKey interface{}
var cert *x509.Certificate
if parsedKey, err = x509.ParsePKIXPublicKey(encoded.Bytes); err != nil {
if cert,err = x509.ParseCertificate(encoded.Bytes);err!=nil {
return nil, err
}
parsedKey=cert.PublicKey
}
var ok bool
if key, ok = parsedKey.(*rsa.PublicKey); !ok {
return nil, errors.New("Rsa.NewPublic(): Key is not a valid RSA public key")
}
return key, nil
}
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