STACK_OF(X509) *sktmp = NULL;
if (ctx->cert == NULL) {
X509err(X509_F_X509_VERIFY_CERT, X509_R_NO_CERT_SET_FOR_US_TO_VERIFY);
+ ctx->error = X509_V_ERR_INVALID_CALL;
+ return -1;
+ }
+ if (ctx->chain != NULL) {
+ /*
+ * This X509_STORE_CTX has already been used to verify a cert. We
+ * cannot do another one.
+ */
+ X509err(X509_F_X509_VERIFY_CERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ ctx->error = X509_V_ERR_INVALID_CALL;
return -1;
}
* first we make sure the chain we are going to build is present and that
* the first entry is in place
*/
- if (ctx->chain == NULL) {
- if (((ctx->chain = sk_X509_new_null()) == NULL) ||
- (!sk_X509_push(ctx->chain, ctx->cert))) {
- X509err(X509_F_X509_VERIFY_CERT, ERR_R_MALLOC_FAILURE);
- goto end;
- }
- CRYPTO_add(&ctx->cert->references, 1, CRYPTO_LOCK_X509);
- ctx->last_untrusted = 1;
+ if (((ctx->chain = sk_X509_new_null()) == NULL) ||
+ (!sk_X509_push(ctx->chain, ctx->cert))) {
+ X509err(X509_F_X509_VERIFY_CERT, ERR_R_MALLOC_FAILURE);
+ ctx->error = X509_V_ERR_OUT_OF_MEM;
+ ok = -1;
+ goto end;
}
+ CRYPTO_add(&ctx->cert->references, 1, CRYPTO_LOCK_X509);
+ ctx->last_untrusted = 1;
/* We use a temporary STACK so we can chop and hack at it */
if (ctx->untrusted != NULL
&& (sktmp = sk_X509_dup(ctx->untrusted)) == NULL) {
X509err(X509_F_X509_VERIFY_CERT, ERR_R_MALLOC_FAILURE);
+ ctx->error = X509_V_ERR_OUT_OF_MEM;
+ ok = -1;
goto end;
}
if (xtmp != NULL) {
if (!sk_X509_push(ctx->chain, xtmp)) {
X509err(X509_F_X509_VERIFY_CERT, ERR_R_MALLOC_FAILURE);
+ ctx->error = X509_V_ERR_OUT_OF_MEM;
+ ok = -1;
goto end;
}
CRYPTO_add(&xtmp->references, 1, CRYPTO_LOCK_X509);
if (ctx->check_issued(ctx, x, x))
break;
ok = ctx->get_issuer(&xtmp, ctx, x);
- if (ok < 0)
- return ok;
+ if (ok < 0) {
+ ctx->error = X509_V_ERR_STORE_LOOKUP;
+ goto end;
+ }
if (ok == 0)
break;
x = xtmp;
if (!sk_X509_push(ctx->chain, x)) {
X509_free(xtmp);
X509err(X509_F_X509_VERIFY_CERT, ERR_R_MALLOC_FAILURE);
- return 0;
+ ctx->error = X509_V_ERR_OUT_OF_MEM;
+ ok = -1;
+ goto end;
}
num++;
}
* if the user hasn't switched off alternate chain checking
*/
retry = 0;
- if (j == ctx->last_untrusted &&
+ if (num == ctx->last_untrusted &&
!(ctx->param->flags & X509_V_FLAG_NO_ALT_CHAINS)) {
while (j-- > 1) {
xtmp2 = sk_X509_value(ctx->chain, j - 1);
ok = ctx->get_issuer(&xtmp, ctx, xtmp2);
- if (ok < 0)
+ if (ok < 0) {
+ ctx->error = X509_V_ERR_STORE_LOOKUP;
goto end;
+ }
/* Check if we found an alternate chain */
if (ok > 0) {
/*
sk_X509_free(sktmp);
if (chain_ss != NULL)
X509_free(chain_ss);
+
+ /* Safety net, error returns must set ctx->error */
+ if (ok <= 0 && ctx->error == X509_V_OK)
+ ctx->error = X509_V_ERR_UNSPECIFIED;
return ok;
}
* the next certificate must be a CA certificate.
*/
if (x->ex_flags & EXFLAG_PROXY) {
- if (x->ex_pcpathlen != -1 && i > x->ex_pcpathlen) {
- ctx->error = X509_V_ERR_PROXY_PATH_LENGTH_EXCEEDED;
- ctx->error_depth = i;
- ctx->current_cert = x;
- ok = cb(0, ctx);
- if (!ok)
- goto end;
+ /*
+ * RFC3820, 4.1.3 (b)(1) stipulates that if pCPathLengthConstraint
+ * is less than max_path_length, the former should be copied to
+ * the latter, and 4.1.4 (a) stipulates that max_path_length
+ * should be verified to be larger than zero and decrement it.
+ *
+ * Because we're checking the certs in the reverse order, we start
+ * with verifying that proxy_path_length isn't larger than pcPLC,
+ * and copy the latter to the former if it is, and finally,
+ * increment proxy_path_length.
+ */
+ if (x->ex_pcpathlen != -1) {
+ if (proxy_path_length > x->ex_pcpathlen) {
+ ctx->error = X509_V_ERR_PROXY_PATH_LENGTH_EXCEEDED;
+ ctx->error_depth = i;
+ ctx->current_cert = x;
+ ok = cb(0, ctx);
+ if (!ok)
+ goto end;
+ }
+ proxy_path_length = x->ex_pcpathlen;
}
proxy_path_length++;
must_be_ca = 0;
/* Ignore self issued certs unless last in chain */
if (i && (x->ex_flags & EXFLAG_SI))
continue;
+
+ /*
+ * Proxy certificates policy has an extra constraint, where the
+ * certificate subject MUST be the issuer with a single CN entry
+ * added.
+ * (RFC 3820: 3.4, 4.1.3 (a)(4))
+ */
+ if (x->ex_flags & EXFLAG_PROXY) {
+ X509_NAME *tmpsubject = X509_get_subject_name(x);
+ X509_NAME *tmpissuer = X509_get_issuer_name(x);
+ X509_NAME_ENTRY *tmpentry = NULL;
+ int last_object_nid = 0;
+ int err = X509_V_OK;
+ int last_object_loc = X509_NAME_entry_count(tmpsubject) - 1;
+
+ /* Check that there are at least two RDNs */
+ if (last_object_loc < 1) {
+ err = X509_V_ERR_PROXY_SUBJECT_NAME_VIOLATION;
+ goto proxy_name_done;
+ }
+
+ /*
+ * Check that there is exactly one more RDN in subject as
+ * there is in issuer.
+ */
+ if (X509_NAME_entry_count(tmpsubject)
+ != X509_NAME_entry_count(tmpissuer) + 1) {
+ err = X509_V_ERR_PROXY_SUBJECT_NAME_VIOLATION;
+ goto proxy_name_done;
+ }
+
+ /*
+ * Check that the last subject component isn't part of a
+ * multivalued RDN
+ */
+ if (X509_NAME_get_entry(tmpsubject, last_object_loc)->set
+ == X509_NAME_get_entry(tmpsubject, last_object_loc - 1)->set) {
+ err = X509_V_ERR_PROXY_SUBJECT_NAME_VIOLATION;
+ goto proxy_name_done;
+ }
+
+ /*
+ * Check that the last subject RDN is a commonName, and that
+ * all the previous RDNs match the issuer exactly
+ */
+ tmpsubject = X509_NAME_dup(tmpsubject);
+ if (tmpsubject == NULL) {
+ X509err(X509_F_CHECK_NAME_CONSTRAINTS, ERR_R_MALLOC_FAILURE);
+ ctx->error = X509_V_ERR_OUT_OF_MEM;
+ return 0;
+ }
+
+ tmpentry =
+ X509_NAME_delete_entry(tmpsubject, last_object_loc);
+ last_object_nid =
+ OBJ_obj2nid(X509_NAME_ENTRY_get_object(tmpentry));
+
+ if (last_object_nid != NID_commonName
+ || X509_NAME_cmp(tmpsubject, tmpissuer) != 0) {
+ err = X509_V_ERR_PROXY_SUBJECT_NAME_VIOLATION;
+ }
+
+ X509_NAME_ENTRY_free(tmpentry);
+ X509_NAME_free(tmpsubject);
+
+ proxy_name_done:
+ if (err != X509_V_OK) {
+ ctx->error = err;
+ ctx->error_depth = i;
+ ctx->current_cert = x;
+ if (!ctx->verify_cb(0, ctx))
+ return 0;
+ }
+ }
+
/*
* Check against constraints for all certificates higher in chain
* including trust anchor. Trust anchor not strictly speaking needed
NAME_CONSTRAINTS *nc = sk_X509_value(ctx->chain, j)->nc;
if (nc) {
rv = NAME_CONSTRAINTS_check(x, nc);
- if (rv != X509_V_OK) {
+ switch (rv) {
+ case X509_V_OK:
+ continue;
+ case X509_V_ERR_OUT_OF_MEM:
+ ctx->error = rv;
+ return 0;
+ default:
ctx->error = rv;
ctx->error_depth = i;
ctx->current_cert = x;
if (!ctx->verify_cb(0, ctx))
return 0;
+ break;
}
}
}
ctx->param->policies, ctx->param->flags);
if (ret == 0) {
X509err(X509_F_CHECK_POLICY, ERR_R_MALLOC_FAILURE);
+ ctx->error = X509_V_ERR_OUT_OF_MEM;
return 0;
}
/* Invalid or inconsistent extensions */
if (ctx->param->flags & X509_V_FLAG_NOTIFY_POLICY) {
ctx->current_cert = NULL;
- ctx->error = X509_V_OK;
+ /*
+ * Verification errors need to be "sticky", a callback may have allowed
+ * an SSL handshake to continue despite an error, and we must then
+ * remain in an error state. Therefore, we MUST NOT clear earlier
+ * verification errors by setting the error to X509_V_OK.
+ */
if (!ctx->verify_cb(2, ctx))
return 0;
}
ctx->current_reasons = 0;
ctx->tree = NULL;
ctx->parent = NULL;
+ /* Zero ex_data to make sure we're cleanup-safe */
+ memset(&ctx->ex_data, 0, sizeof(ctx->ex_data));
ctx->param = X509_VERIFY_PARAM_new();
-
if (!ctx->param) {
X509err(X509_F_X509_STORE_CTX_INIT, ERR_R_MALLOC_FAILURE);
return 0;
/*
* Inherit callbacks and flags from X509_STORE if not set use defaults.
*/
-
if (store)
ret = X509_VERIFY_PARAM_inherit(ctx->param, store->param);
else
if (store) {
ctx->verify_cb = store->verify_cb;
+ /* Seems to always be 0 in OpenSSL, else must be idempotent */
ctx->cleanup = store->cleanup;
} else
ctx->cleanup = 0;
if (ret == 0) {
X509err(X509_F_X509_STORE_CTX_INIT, ERR_R_MALLOC_FAILURE);
- return 0;
+ goto err;
}
if (store && store->check_issued)
ctx->check_policy = check_policy;
+ if (CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE_CTX, ctx,
+ &ctx->ex_data))
+ return 1;
+ X509err(X509_F_X509_STORE_CTX_INIT, ERR_R_MALLOC_FAILURE);
+
+ err:
/*
- * This memset() can't make any sense anyway, so it's removed. As
- * X509_STORE_CTX_cleanup does a proper "free" on the ex_data, we put a
- * corresponding "new" here and remove this bogus initialisation.
+ * On error clean up allocated storage, if the store context was not
+ * allocated with X509_STORE_CTX_new() this is our last chance to do so.
*/
- /* memset(&(ctx->ex_data),0,sizeof(CRYPTO_EX_DATA)); */
- if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE_CTX, ctx,
- &(ctx->ex_data))) {
- OPENSSL_free(ctx);
- X509err(X509_F_X509_STORE_CTX_INIT, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- return 1;
+ X509_STORE_CTX_cleanup(ctx);
+ return 0;
}
/*
void X509_STORE_CTX_cleanup(X509_STORE_CTX *ctx)
{
- if (ctx->cleanup)
+ /*
+ * We need to be idempotent because, unfortunately, free() also calls
+ * cleanup(), so the natural call sequence new(), init(), cleanup(), free()
+ * calls cleanup() for the same object twice! Thus we must zero the
+ * pointers below after they're freed!
+ */
+ /* Seems to always be 0 in OpenSSL, do this at most once. */
+ if (ctx->cleanup != NULL) {
ctx->cleanup(ctx);
+ ctx->cleanup = NULL;
+ }
if (ctx->param != NULL) {
if (ctx->parent == NULL)
X509_VERIFY_PARAM_free(ctx->param);
projects / openssl.git / blobdiff