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path: root/crypto/x509/x509_vfy.c
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Diffstat (limited to 'crypto/x509/x509_vfy.c')
-rw-r--r--crypto/x509/x509_vfy.c109
1 files changed, 64 insertions, 45 deletions
diff --git a/crypto/x509/x509_vfy.c b/crypto/x509/x509_vfy.c
index ab94948..4d34dba 100644
--- a/crypto/x509/x509_vfy.c
+++ b/crypto/x509/x509_vfy.c
@@ -194,6 +194,9 @@ int X509_verify_cert(X509_STORE_CTX *ctx)
int num, j, retry;
int (*cb) (int xok, X509_STORE_CTX *xctx);
STACK_OF(X509) *sktmp = NULL;
+ int trust = X509_TRUST_UNTRUSTED;
+ int err;
+
if (ctx->cert == NULL) {
X509err(X509_F_X509_VERIFY_CERT, X509_R_NO_CERT_SET_FOR_US_TO_VERIFY);
return -1;
@@ -216,7 +219,8 @@ int X509_verify_cert(X509_STORE_CTX *ctx)
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;
+ ok = -1;
+ goto err;
}
CRYPTO_add(&ctx->cert->references, 1, CRYPTO_LOCK_X509);
ctx->last_untrusted = 1;
@@ -225,7 +229,8 @@ int X509_verify_cert(X509_STORE_CTX *ctx)
if (ctx->untrusted != NULL
&& (sktmp = sk_X509_dup(ctx->untrusted)) == NULL) {
X509err(X509_F_X509_VERIFY_CERT, ERR_R_MALLOC_FAILURE);
- goto end;
+ ok = -1;
+ goto err;
}
num = sk_X509_num(ctx->chain);
@@ -249,7 +254,7 @@ int X509_verify_cert(X509_STORE_CTX *ctx)
if (ctx->param->flags & X509_V_FLAG_TRUSTED_FIRST) {
ok = ctx->get_issuer(&xtmp, ctx, x);
if (ok < 0)
- goto end;
+ goto err;
/*
* If successful for now free up cert so it will be picked up
* again later.
@@ -266,7 +271,8 @@ int X509_verify_cert(X509_STORE_CTX *ctx)
if (xtmp != NULL) {
if (!sk_X509_push(ctx->chain, xtmp)) {
X509err(X509_F_X509_VERIFY_CERT, ERR_R_MALLOC_FAILURE);
- goto end;
+ ok = -1;
+ goto err;
}
CRYPTO_add(&xtmp->references, 1, CRYPTO_LOCK_X509);
(void)sk_X509_delete_ptr(sktmp, xtmp);
@@ -314,7 +320,7 @@ int X509_verify_cert(X509_STORE_CTX *ctx)
bad_chain = 1;
ok = cb(0, ctx);
if (!ok)
- goto end;
+ goto err;
} else {
/*
* We have a match: replace certificate with store
@@ -347,25 +353,26 @@ int X509_verify_cert(X509_STORE_CTX *ctx)
ok = ctx->get_issuer(&xtmp, ctx, x);
if (ok < 0)
- goto end;
+ goto err;
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);
- ok = 0;
- goto end;
+ ok = -1;
+ goto err;
}
num++;
}
/* we now have our chain, lets check it... */
- i = check_trust(ctx);
+ if ((trust = check_trust(ctx)) == X509_TRUST_REJECTED) {
+ /* Callback already issued */
+ ok = 0;
+ goto err;
+ }
- /* If explicitly rejected error */
- if (i == X509_TRUST_REJECTED)
- goto end;
/*
* If it's not explicitly trusted then check if there is an alternative
* chain that could be used. We only do this if we haven't already
@@ -373,14 +380,14 @@ int X509_verify_cert(X509_STORE_CTX *ctx)
* chain checking
*/
retry = 0;
- if (i != X509_TRUST_TRUSTED
+ if (trust != X509_TRUST_TRUSTED
&& !(ctx->param->flags & X509_V_FLAG_TRUSTED_FIRST)
&& !(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)
- goto end;
+ goto err;
/* Check if we found an alternate chain */
if (ok > 0) {
/*
@@ -410,7 +417,7 @@ int X509_verify_cert(X509_STORE_CTX *ctx)
* self signed certificate in which case we've indicated an error already
* and set bad_chain == 1
*/
- if (i != X509_TRUST_TRUSTED && !bad_chain) {
+ if (trust != X509_TRUST_TRUSTED && !bad_chain) {
if ((chain_ss == NULL) || !ctx->check_issued(ctx, x, chain_ss)) {
if (ctx->last_untrusted >= num)
ctx->error = X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY;
@@ -431,26 +438,26 @@ int X509_verify_cert(X509_STORE_CTX *ctx)
bad_chain = 1;
ok = cb(0, ctx);
if (!ok)
- goto end;
+ goto err;
}
/* We have the chain complete: now we need to check its purpose */
ok = check_chain_extensions(ctx);
if (!ok)
- goto end;
+ goto err;
/* Check name constraints */
ok = check_name_constraints(ctx);
if (!ok)
- goto end;
+ goto err;
ok = check_id(ctx);
if (!ok)
- goto end;
+ goto err;
/* We may as well copy down any DSA parameters that are required */
X509_get_pubkey_parameters(NULL, ctx->chain);
@@ -462,16 +469,16 @@ int X509_verify_cert(X509_STORE_CTX *ctx)
ok = ctx->check_revocation(ctx);
if (!ok)
- goto end;
+ goto err;
- i = X509_chain_check_suiteb(&ctx->error_depth, NULL, ctx->chain,
- ctx->param->flags);
- if (i != X509_V_OK) {
- ctx->error = i;
+ err = X509_chain_check_suiteb(&ctx->error_depth, NULL, ctx->chain,
+ ctx->param->flags);
+ if (err != X509_V_OK) {
+ ctx->error = err;
ctx->current_cert = sk_X509_value(ctx->chain, ctx->error_depth);
ok = cb(0, ctx);
if (!ok)
- goto end;
+ goto err;
}
/* At this point, we have a chain and need to verify it */
@@ -480,25 +487,28 @@ int X509_verify_cert(X509_STORE_CTX *ctx)
else
ok = internal_verify(ctx);
if (!ok)
- goto end;
+ goto err;
#ifndef OPENSSL_NO_RFC3779
/* RFC 3779 path validation, now that CRL check has been done */
ok = v3_asid_validate_path(ctx);
if (!ok)
- goto end;
+ goto err;
ok = v3_addr_validate_path(ctx);
if (!ok)
- goto end;
+ goto err;
#endif
/* If we get this far evaluate policies */
if (!bad_chain && (ctx->param->flags & X509_V_FLAG_POLICY_CHECK))
ok = ctx->check_policy(ctx);
if (!ok)
- goto end;
+ goto err;
if (0) {
- end:
+ err:
+ /* Ensure we return an error */
+ if (ok > 0)
+ ok = 0;
X509_get_pubkey_parameters(NULL, ctx->chain);
}
if (sktmp != NULL)
@@ -2283,9 +2293,10 @@ int X509_STORE_CTX_init(X509_STORE_CTX *ctx, X509_STORE *store, X509 *x509,
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;
@@ -2294,7 +2305,6 @@ int X509_STORE_CTX_init(X509_STORE_CTX *ctx, X509_STORE *store, X509 *x509,
/*
* Inherit callbacks and flags from X509_STORE if not set use defaults.
*/
-
if (store)
ret = X509_VERIFY_PARAM_inherit(ctx->param, store->param);
else
@@ -2302,6 +2312,7 @@ int X509_STORE_CTX_init(X509_STORE_CTX *ctx, X509_STORE *store, X509 *x509,
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;
@@ -2312,7 +2323,7 @@ int X509_STORE_CTX_init(X509_STORE_CTX *ctx, X509_STORE *store, X509 *x509,
if (ret == 0) {
X509err(X509_F_X509_STORE_CTX_INIT, ERR_R_MALLOC_FAILURE);
- return 0;
+ goto err;
}
if (store && store->check_issued)
@@ -2367,19 +2378,18 @@ int X509_STORE_CTX_init(X509_STORE_CTX *ctx, X509_STORE *store, X509 *x509,
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;
}
/*
@@ -2395,8 +2405,17 @@ void X509_STORE_CTX_trusted_stack(X509_STORE_CTX *ctx, STACK_OF(X509) *sk)
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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-10 17:24:39 +0000