diff options
Diffstat (limited to 'crypto/asymmetric_keys/pkcs7_verify.c')
| -rw-r--r-- | crypto/asymmetric_keys/pkcs7_verify.c | 47 |
1 files changed, 36 insertions, 11 deletions
diff --git a/crypto/asymmetric_keys/pkcs7_verify.c b/crypto/asymmetric_keys/pkcs7_verify.c index a4d083f7e9e1..42bfc9de0d79 100644 --- a/crypto/asymmetric_keys/pkcs7_verify.c +++ b/crypto/asymmetric_keys/pkcs7_verify.c @@ -170,6 +170,7 @@ static int pkcs7_verify_sig_chain(struct pkcs7_message *pkcs7, struct pkcs7_signed_info *sinfo) { struct x509_certificate *x509 = sinfo->signer, *p; + struct asymmetric_key_id *auth; int ret; kenter(""); @@ -187,11 +188,14 @@ static int pkcs7_verify_sig_chain(struct pkcs7_message *pkcs7, goto maybe_missing_crypto_in_x509; pr_debug("- issuer %s\n", x509->issuer); + if (x509->akid_id) + pr_debug("- authkeyid.id %*phN\n", + x509->akid_id->len, x509->akid_id->data); if (x509->akid_skid) - pr_debug("- authkeyid %*phN\n", + pr_debug("- authkeyid.skid %*phN\n", x509->akid_skid->len, x509->akid_skid->data); - if (!x509->akid_skid || + if ((!x509->akid_id && !x509->akid_skid) || strcmp(x509->subject, x509->issuer) == 0) { /* If there's no authority certificate specified, then * the certificate must be self-signed and is the root @@ -215,21 +219,42 @@ static int pkcs7_verify_sig_chain(struct pkcs7_message *pkcs7, /* Look through the X.509 certificates in the PKCS#7 message's * list to see if the next one is there. */ - pr_debug("- want %*phN\n", - x509->akid_skid->len, x509->akid_skid->data); - for (p = pkcs7->certs; p; p = p->next) { - if (!p->skid) - continue; - pr_debug("- cmp [%u] %*phN\n", - p->index, p->skid->len, p->skid->data); - if (asymmetric_key_id_same(p->skid, x509->akid_skid)) - goto found_issuer; + auth = x509->akid_id; + if (auth) { + pr_debug("- want %*phN\n", auth->len, auth->data); + for (p = pkcs7->certs; p; p = p->next) { + pr_debug("- cmp [%u] %*phN\n", + p->index, p->id->len, p->id->data); + if (asymmetric_key_id_same(p->id, auth)) + goto found_issuer_check_skid; + } + } else { + auth = x509->akid_skid; + pr_debug("- want %*phN\n", auth->len, auth->data); + for (p = pkcs7->certs; p; p = p->next) { + if (!p->skid) + continue; + pr_debug("- cmp [%u] %*phN\n", + p->index, p->skid->len, p->skid->data); + if (asymmetric_key_id_same(p->skid, auth)) + goto found_issuer; + } } /* We didn't find the root of this chain */ pr_debug("- top\n"); return 0; + found_issuer_check_skid: + /* We matched issuer + serialNumber, but if there's an + * authKeyId.keyId, that must match the CA subjKeyId also. + */ + if (x509->akid_skid && + !asymmetric_key_id_same(p->skid, x509->akid_skid)) { + pr_warn("Sig %u: X.509 chain contains auth-skid nonmatch (%u->%u)\n", + sinfo->index, x509->index, p->index); + return -EKEYREJECTED; + } found_issuer: pr_debug("- subject %s\n", p->subject); if (p->seen) { |