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pkcs15: add some prep for maybe ec key support later

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This commit is contained in:
Greg T. Wallace 2024-06-24 18:23:05 -04:00
parent 06f9892501
commit 7c1ad8ef43
5 changed files with 167 additions and 86 deletions
pkg/pkcs15
private_key.go

50
pkg/pkcs15/private_key.go
View file

@ -1,24 +1,42 @@
package pkcs15
import "apc-p15-tool/pkg/tools/asn1obj"
import (
"apc-p15-tool/pkg/tools/asn1obj"
"crypto/rsa"
)
// privateKeyObject returns the ASN.1 representation of a private key
func (p15 *pkcs15KeyCert) privateKeyObject() []byte {
// ensure all expected vals are available
p15.key.Precompute()
var privKeyObj []byte
pkey := asn1obj.Sequence([][]byte{
// P
asn1obj.IntegerExplicitValue(3, p15.key.Primes[0]),
// Q
asn1obj.IntegerExplicitValue(4, p15.key.Primes[1]),
// Dp
asn1obj.IntegerExplicitValue(5, p15.key.Precomputed.Dp),
// Dq
asn1obj.IntegerExplicitValue(6, p15.key.Precomputed.Dq),
// Qinv
asn1obj.IntegerExplicitValue(7, p15.key.Precomputed.Qinv),
})
switch privKey := p15.key.(type) {
case *rsa.PrivateKey:
privKey.Precompute()
return pkey
// ensure all expected vals are available
privKeyObj = asn1obj.Sequence([][]byte{
// P
asn1obj.IntegerExplicitValue(3, privKey.Primes[0]),
// Q
asn1obj.IntegerExplicitValue(4, privKey.Primes[1]),
// Dp
asn1obj.IntegerExplicitValue(5, privKey.Precomputed.Dp),
// Dq
asn1obj.IntegerExplicitValue(6, privKey.Precomputed.Dq),
// Qinv
asn1obj.IntegerExplicitValue(7, privKey.Precomputed.Qinv),
})
// case *ecdsa.PrivateKey:
// // Only private piece is the integer D
// privKeyObj = asn1obj.Sequence([][]byte{
// asn1obj.Integer(privKey.D),
// })
default:
// panic if non-RSA key
panic("private key object for non-rsa key is unexpected and unsupported")
}
return privKeyObj
}