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[feature] Support PKCS1 "RSA PUBLIC KEY" pem block type (#1179)

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* ap: add support for PKCS1 "RSA PUBLIC KEY" pem block type

Signed-off-by: Sigrid Solveig Haflínudóttir <sigrid@ftrv.se>

* ap: report no PEM data or unknown pem block type

Signed-off-by: Sigrid Solveig Haflínudóttir <sigrid@ftrv.se>

Signed-off-by: Sigrid Solveig Haflínudóttir <sigrid@ftrv.se>
This commit is contained in:
Sigrid Solveig Haflínudóttir 2022-11-30 23:13:13 +01:00 • committed by GitHub
commit 5a0e418281
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1 changed files with 12 additions and 5 deletions
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17
internal/ap/extract.go
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@ -22,6 +22,7 @@
package ap
import (
"crypto"
"crypto/rsa"
"crypto/x509"
"encoding/pem"
@ -318,18 +319,24 @@ func ExtractPublicKeyForOwner(i WithPublicKey, forOwner *url.URL) (*rsa.PublicKe
}
block, _ := pem.Decode([]byte(pkeyPem))
if block == nil || block.Type != "PUBLIC KEY" {
return nil, nil, errors.New("could not decode publicKeyPem to PUBLIC KEY pem block type")
if block == nil {
return nil, nil, errors.New("could not decode publicKeyPem: no PEM data")
}
var p crypto.PublicKey
switch block.Type {
case "PUBLIC KEY":
p, err = x509.ParsePKIXPublicKey(block.Bytes)
case "RSA PUBLIC KEY":
p, err = x509.ParsePKCS1PublicKey(block.Bytes)
default:
return nil, nil, fmt.Errorf("could not parse public key: unknown block type: %q", block.Type)
}
p, err := x509.ParsePKIXPublicKey(block.Bytes)
if err != nil {
return nil, nil, fmt.Errorf("could not parse public key from block bytes: %s", err)
}
if p == nil {
return nil, nil, errors.New("returned public key was empty")
}
if publicKey, ok := p.(*rsa.PublicKey); ok {
return publicKey, pkeyID, nil
}