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feat: rework secureboot and PCR signing key
Support different providers, not only static file paths. Drop `pcr-signing-key-public.pem` file, as we generate it on the fly now. See siderolabs/image-factory#19 Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
|
|
||
| // Package database generates SecureBoot auto-enrollment database. | ||
| package database | ||
|
|
||
| import ( | ||
| "crypto/sha256" | ||
|
|
||
| "github.com/foxboron/go-uefi/efi" | ||
| "github.com/foxboron/go-uefi/efi/signature" | ||
| "github.com/foxboron/go-uefi/efi/util" | ||
| "github.com/google/uuid" | ||
|
|
||
| "github.com/siderolabs/talos/internal/pkg/secureboot/pesign" | ||
| "github.com/siderolabs/talos/pkg/machinery/constants" | ||
| ) | ||
|
|
||
| // Entry is a UEFI database entry. | ||
| type Entry struct { | ||
| Name string | ||
| Contents []byte | ||
| } | ||
|
|
||
| // Generate generates a UEFI database to enroll the signing certificate. | ||
| // | ||
| // ref: https://blog.hansenpartnership.com/the-meaning-of-all-the-uefi-keys/ | ||
| func Generate(enrolledCertificate []byte, signer pesign.CertificateSigner) ([]Entry, error) { | ||
| // derive UUID from enrolled certificate | ||
| uuid := uuid.NewHash(sha256.New(), uuid.NameSpaceX500, enrolledCertificate, 4) | ||
|
|
||
| efiGUID := util.StringToGUID(uuid.String()) | ||
|
|
||
| // Create ESL | ||
| db := signature.NewSignatureDatabase() | ||
| if err := db.Append(signature.CERT_X509_GUID, *efiGUID, enrolledCertificate); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| // Sign the ESL, but for each EFI variable | ||
| signedDB, err := efi.SignEFIVariable(signer.Signer(), signer.Certificate(), "db", db.Bytes()) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| signedKEK, err := efi.SignEFIVariable(signer.Signer(), signer.Certificate(), "KEK", db.Bytes()) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| signedPK, err := efi.SignEFIVariable(signer.Signer(), signer.Certificate(), "PK", db.Bytes()) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return []Entry{ | ||
| {Name: constants.SignatureKeyAsset, Contents: signedDB}, | ||
| {Name: constants.KeyExchangeKeyAsset, Contents: signedKEK}, | ||
| {Name: constants.PlatformKeyAsset, Contents: signedPK}, | ||
| }, nil | ||
| } |
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