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cryptutil: update CRL parsing (#4454)

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Move the parseCRLs() method from package 'authorize/evaluator' to
'pkg/cryptutil', replacing the existing DecodeCRL() method. This method
will parse all CRLs found in the PEM input, rather than just the first.

(This removes our usage of the deprecated method x509.ParseDERCRL.)

Update this method to return an error if there is non-PEM data found in
the input, to satisfy the existing test that raw DER-encoded CRLs are
not permitted.

Delete the CRLFromBase64() and CRLFromFile() methods, as these are no
longer used.
This commit is contained in:
Kenneth Jenkins 2023-08-11 08:33:22 -07:00 • committed by GitHub
parent ed9a93fe5b
commit cc1ef1ae18
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6 changed files with 29 additions and 91 deletions
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22
authorize/evaluator/functions.go
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@ -11,6 +11,7 @@ import (
lru "github.com/hashicorp/golang-lru/v2"
"github.com/pomerium/pomerium/internal/log"
"github.com/pomerium/pomerium/pkg/cryptutil"
)
// ClientCertConstraints contains additional constraints to validate when
@ -61,7 +62,7 @@ func isValidClientCertificate(
return false, err
}
crls, err := parseCRLs([]byte(crl))
crls, err := cryptutil.ParseCRLs([]byte(crl))
if err != nil {
return false, err
}
@ -168,22 +169,3 @@ func parseCertificate(pemStr string) (*x509.Certificate, error) {
}
return x509.ParseCertificate(block.Bytes)
}
func parseCRLs(crl []byte) (map[string]*x509.RevocationList, error) {
m := make(map[string]*x509.RevocationList)
for {
var block *pem.Block
block, crl = pem.Decode(crl)
if block == nil {
return m, nil
}
if block.Type != "X509 CRL" {
continue
}
l, err := x509.ParseRevocationList(block.Bytes)
if err != nil {
return nil, err
}
m[string(l.RawIssuer)] = l
}
}