x509/x509name.c: fix potential crash in X509_NAME_get_text_by_OBJ.
[openssl.git] / crypto / x509 / x509_set.c
index c0ea418..3ab6bf3 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the OpenSSL license (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
@@ -9,26 +9,30 @@
 
 #include <stdio.h>
 #include "internal/cryptlib.h"
+#include "internal/refcount.h"
 #include <openssl/asn1.h>
 #include <openssl/objects.h>
 #include <openssl/evp.h>
 #include <openssl/x509.h>
+#include <openssl/x509v3.h>
+#include "internal/asn1_int.h"
 #include "internal/x509_int.h"
+#include "x509_lcl.h"
 
 int X509_set_version(X509 *x, long version)
 {
     if (x == NULL)
-        return (0);
+        return 0;
     if (version == 0) {
         ASN1_INTEGER_free(x->cert_info.version);
         x->cert_info.version = NULL;
-        return (1);
+        return 1;
     }
     if (x->cert_info.version == NULL) {
         if ((x->cert_info.version = ASN1_INTEGER_new()) == NULL)
-            return (0);
+            return 0;
     }
-    return (ASN1_INTEGER_set(x->cert_info.version, version));
+    return ASN1_INTEGER_set(x->cert_info.version, version);
 }
 
 int X509_set_serialNumber(X509 *x, ASN1_INTEGER *serial)
@@ -46,15 +50,15 @@ int X509_set_serialNumber(X509 *x, ASN1_INTEGER *serial)
 int X509_set_issuer_name(X509 *x, X509_NAME *name)
 {
     if (x == NULL)
-        return (0);
-    return (X509_NAME_set(&x->cert_info.issuer, name));
+        return 0;
+    return X509_NAME_set(&x->cert_info.issuer, name);
 }
 
 int X509_set_subject_name(X509 *x, X509_NAME *name)
 {
     if (x == NULL)
-        return (0);
-    return (X509_NAME_set(&x->cert_info.subject, name));
+        return 0;
+    return X509_NAME_set(&x->cert_info.subject, name);
 }
 
 int x509_set1_time(ASN1_TIME **ptm, const ASN1_TIME *tm)
@@ -88,15 +92,15 @@ int X509_set1_notAfter(X509 *x, const ASN1_TIME *tm)
 int X509_set_pubkey(X509 *x, EVP_PKEY *pkey)
 {
     if (x == NULL)
-        return (0);
-    return (X509_PUBKEY_set(&(x->cert_info.key), pkey));
+        return 0;
+    return X509_PUBKEY_set(&(x->cert_info.key), pkey);
 }
 
 int X509_up_ref(X509 *x)
 {
     int i;
 
-    if (CRYPTO_atomic_add(&x->references, 1, &i, x->lock) <= 0)
+    if (CRYPTO_UP_REF(&x->references, &i, x->lock) <= 0)
         return 0;
 
     REF_PRINT_COUNT("X509", x);
@@ -157,3 +161,77 @@ const X509_ALGOR *X509_get0_tbs_sigalg(const X509 *x)
 {
     return &x->cert_info.signature;
 }
+
+int X509_SIG_INFO_get(const X509_SIG_INFO *siginf, int *mdnid, int *pknid,
+                      int *secbits, uint32_t *flags)
+{
+    if (mdnid != NULL)
+        *mdnid = siginf->mdnid;
+    if (pknid != NULL)
+        *pknid = siginf->pknid;
+    if (secbits != NULL)
+        *secbits = siginf->secbits;
+    if (flags != NULL)
+        *flags = siginf->flags;
+    return (siginf->flags & X509_SIG_INFO_VALID) != 0;
+}
+
+void X509_SIG_INFO_set(X509_SIG_INFO *siginf, int mdnid, int pknid,
+                       int secbits, uint32_t flags)
+{
+    siginf->mdnid = mdnid;
+    siginf->pknid = pknid;
+    siginf->secbits = secbits;
+    siginf->flags = flags;
+}
+
+int X509_get_signature_info(X509 *x, int *mdnid, int *pknid, int *secbits,
+                            uint32_t *flags)
+{
+    X509_check_purpose(x, -1, -1);
+    return X509_SIG_INFO_get(&x->siginf, mdnid, pknid, secbits, flags);
+}
+
+static void x509_sig_info_init(X509_SIG_INFO *siginf, const X509_ALGOR *alg,
+                               const ASN1_STRING *sig)
+{
+    int pknid, mdnid;
+    const EVP_MD *md;
+
+    siginf->mdnid = NID_undef;
+    siginf->pknid = NID_undef;
+    siginf->secbits = -1;
+    siginf->flags = 0;
+    if (!OBJ_find_sigid_algs(OBJ_obj2nid(alg->algorithm), &mdnid, &pknid)
+            || pknid == NID_undef)
+        return;
+    siginf->pknid = pknid;
+    if (mdnid == NID_undef) {
+        /* If we have one, use a custom handler for this algorithm */
+        const EVP_PKEY_ASN1_METHOD *ameth = EVP_PKEY_asn1_find(NULL, pknid);
+        if (ameth == NULL || ameth->siginf_set == NULL
+                || ameth->siginf_set(siginf, alg, sig) == 0)
+            return;
+        siginf->flags |= X509_SIG_INFO_VALID;
+        return;
+    }
+    siginf->flags |= X509_SIG_INFO_VALID;
+    siginf->mdnid = mdnid;
+    md = EVP_get_digestbynid(mdnid);
+    if (md == NULL)
+        return;
+    /* Security bits: half number of bits in digest */
+    siginf->secbits = EVP_MD_size(md) * 4;
+    switch (mdnid) {
+        case NID_sha1:
+        case NID_sha256:
+        case NID_sha384:
+        case NID_sha512:
+        siginf->flags |= X509_SIG_INFO_TLS;
+    }
+}
+
+void x509_init_sig_info(X509 *x)
+{
+    x509_sig_info_init(&x->siginf, &x->sig_alg, &x->signature);
+}