diff options
author | Pauli <paul.dale@oracle.com> | 2020-08-15 10:35:59 +1000 |
---|---|---|
committer | Pauli <paul.dale@oracle.com> | 2020-08-19 13:15:27 +1000 |
commit | c51a8af8cca755ceefba64b3cbd0bdb91c74d77c (patch) | |
tree | ebf7c951c64cd722641fea0c13e2f309a7e76433 /crypto/ocsp/ocsp_vfy.c | |
parent | c9dcbc0759be1e733273cc0b5602bdbbd3542b27 (diff) |
OCSP: Add return value checks.
The calls are unlikely to fail but better checking their return than not.
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/12648)
Diffstat (limited to 'crypto/ocsp/ocsp_vfy.c')
-rw-r--r-- | crypto/ocsp/ocsp_vfy.c | 53 |
1 files changed, 33 insertions, 20 deletions
diff --git a/crypto/ocsp/ocsp_vfy.c b/crypto/ocsp/ocsp_vfy.c index 33cd236af7..adf4970d58 100644 --- a/crypto/ocsp/ocsp_vfy.c +++ b/crypto/ocsp/ocsp_vfy.c @@ -54,6 +54,7 @@ int OCSP_basic_verify(OCSP_BASICRESP *bs, STACK_OF(X509) *certs, flags |= OCSP_NOVERIFY; if (!(flags & OCSP_NOSIGS)) { EVP_PKEY *skey; + skey = X509_get0_pubkey(signer); if (skey == NULL) { OCSPerr(OCSP_F_OCSP_BASIC_VERIFY, OCSP_R_NO_SIGNER_KEY); @@ -153,6 +154,7 @@ static int ocsp_find_signer(X509 **psigner, OCSP_BASICRESP *bs, { X509 *signer; OCSP_RESPID *rid = &bs->tbsResponseData.responderId; + if ((signer = ocsp_find_signer_sk(certs, rid))) { *psigner = signer; return 2; @@ -187,8 +189,9 @@ static X509 *ocsp_find_signer_sk(STACK_OF(X509) *certs, OCSP_RESPID *id) /* Calculate hash of each key and compare */ for (i = 0; i < sk_X509_num(certs); i++) { x = sk_X509_value(certs, i); - X509_pubkey_digest(x, EVP_sha1(), tmphash, NULL); - if (!memcmp(keyhash, tmphash, SHA_DIGEST_LENGTH)) + if (!X509_pubkey_digest(x, EVP_sha1(), tmphash, NULL)) + break; + if (memcmp(keyhash, tmphash, SHA_DIGEST_LENGTH) == 0) return x; } return NULL; @@ -200,8 +203,8 @@ static int ocsp_check_issuer(OCSP_BASICRESP *bs, STACK_OF(X509) *chain) X509 *signer, *sca; OCSP_CERTID *caid = NULL; int i; - sresp = bs->tbsResponseData.responses; + sresp = bs->tbsResponseData.responses; if (sk_X509_num(chain) <= 0) { OCSPerr(OCSP_F_OCSP_CHECK_ISSUER, OCSP_R_NO_CERTIFICATES_IN_CHAIN); return -1; @@ -274,52 +277,60 @@ static int ocsp_check_ids(STACK_OF(OCSP_SINGLERESP) *sresp, OCSP_CERTID **ret) return 1; } +/* + * Match the certificate issuer ID. + * Returns -1 on error, 0 if there is no match and 1 if there is a match. + */ static int ocsp_match_issuerid(X509 *cert, OCSP_CERTID *cid, STACK_OF(OCSP_SINGLERESP) *sresp) { /* If only one ID to match then do it */ - if (cid) { + if (cid != NULL) { const EVP_MD *dgst; const X509_NAME *iname; int mdlen; unsigned char md[EVP_MAX_MD_SIZE]; - if ((dgst = EVP_get_digestbyobj(cid->hashAlgorithm.algorithm)) - == NULL) { - OCSPerr(OCSP_F_OCSP_MATCH_ISSUERID, - OCSP_R_UNKNOWN_MESSAGE_DIGEST); + + dgst = EVP_get_digestbyobj(cid->hashAlgorithm.algorithm); + if (dgst == NULL) { + OCSPerr(0, OCSP_R_UNKNOWN_MESSAGE_DIGEST); return -1; } mdlen = EVP_MD_size(dgst); - if (mdlen < 0) + if (mdlen < 0) { + OCSPerr(0, OCSP_R_DIGEST_SIZE_ERR); return -1; - if ((cid->issuerNameHash.length != mdlen) || - (cid->issuerKeyHash.length != mdlen)) + } + if (cid->issuerNameHash.length != mdlen || + cid->issuerKeyHash.length != mdlen) return 0; iname = X509_get_subject_name(cert); - if (!X509_NAME_digest(iname, dgst, md, NULL)) + if (!X509_NAME_digest(iname, dgst, md, NULL)) { + OCSPerr(0, OCSP_R_DIGEST_NAME_ERR); return -1; - if (memcmp(md, cid->issuerNameHash.data, mdlen)) + } + if (memcmp(md, cid->issuerNameHash.data, mdlen) != 0) return 0; - X509_pubkey_digest(cert, dgst, md, NULL); - if (memcmp(md, cid->issuerKeyHash.data, mdlen)) + if (!X509_pubkey_digest(cert, dgst, md, NULL)) { + OCSPerr(0, OCSP_R_DIGEST_ERR); + return -1; + } + if (memcmp(md, cid->issuerKeyHash.data, mdlen) != 0) return 0; - - return 1; - } else { /* We have to match the whole lot */ int i, ret; OCSP_CERTID *tmpid; + for (i = 0; i < sk_OCSP_SINGLERESP_num(sresp); i++) { tmpid = sk_OCSP_SINGLERESP_value(sresp, i)->certId; ret = ocsp_match_issuerid(cert, tmpid, NULL); if (ret <= 0) return ret; } - return 1; } - + return 1; } static int ocsp_check_delegated(X509 *x) @@ -381,6 +392,7 @@ int OCSP_request_verify(OCSP_REQUEST *req, STACK_OF(X509) *certs, } if (!(flags & OCSP_NOVERIFY)) { int init_res; + if (flags & OCSP_NOCHAIN) init_res = X509_STORE_CTX_init(ctx, store, signer, NULL); else @@ -419,6 +431,7 @@ static int ocsp_req_find_signer(X509 **psigner, OCSP_REQUEST *req, unsigned long flags) { X509 *signer; + if (!(flags & OCSP_NOINTERN)) { signer = X509_find_by_subject(req->optionalSignature->certs, nm); if (signer) { |