diff options
| author | Thore Sommer <public@thson.de> | 2023-08-15 14:29:42 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-23 11:59:55 +0300 |
| commit | 15b3727108c78b18ae3042d3e12843ae40403331 (patch) | |
| tree | d360789a12feffe3895307372bb20bf3471917a1 /crypto | |
| parent | 7a7dd70cb954d3efa706a429687ded88c02496fa (diff) | |
| download | linux-15b3727108c78b18ae3042d3e12843ae40403331.tar.xz | |
X.509: if signature is unsupported skip validation
commit ef5b52a631f8c18353e80ccab8408b963305510c upstream.
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>
Cc: stable@vger.kernel.org # v4.7+
Fixes: 6c2dc5ae4ab7 ("X.509: Extract signature digest and make self-signed cert checks earlier")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/asymmetric_keys/x509_public_key.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/crypto/asymmetric_keys/x509_public_key.c b/crypto/asymmetric_keys/x509_public_key.c index d964cc82b69c..4711dace329e 100644 --- a/crypto/asymmetric_keys/x509_public_key.c +++ b/crypto/asymmetric_keys/x509_public_key.c @@ -129,6 +129,11 @@ int x509_check_for_self_signed(struct x509_certificate *cert) if (strcmp(cert->pub->pkey_algo, cert->sig->pkey_algo) != 0) 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) { |