Messages in this thread Patch in this message | | | From | Thore Sommer <> | Subject | [PATCH] X.509: if signature is unsupported skip validation | Date | Tue, 15 Aug 2023 14:29:42 +0300 |
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When the hash algorithm for the signature is not available the digest size is 0 and the signature in the certificate is marked as unsupported.
When validating a self-signed certificate, this needs to be checked, because otherwise trying to validate the signature will fail with an warning:
Loading compiled-in X.509 certificates WARNING: CPU: 0 PID: 1 at crypto/rsa-pkcs1pad.c:537 \ pkcs1pad_verify+0x46/0x12c ... Problem loading in-kernel X.509 certificate (-22)
Signed-off-by: Thore Sommer <public@thson.de> --- crypto/asymmetric_keys/x509_public_key.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/crypto/asymmetric_keys/x509_public_key.c b/crypto/asymmetric_keys/x509_public_key.c index 6fdfc82e23a8..7c71db3ac23d 100644 --- a/crypto/asymmetric_keys/x509_public_key.c +++ b/crypto/asymmetric_keys/x509_public_key.c @@ -130,6 +130,11 @@ int x509_check_for_self_signed(struct x509_certificate *cert) goto out; } + if (cert->unsupported_sig) { + ret = 0; + goto out; + } + ret = public_key_verify_signature(cert->pub, cert->sig); if (ret < 0) { if (ret == -ENOPKG) { -- 2.41.0
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