1 files changed, 24 insertions, 30 deletions

diff --git a/key.c b/key.c
index 08c158b59..93b2d41fe 100644
--- a/key.c
+++ b/key.c
@@ -1,3 +1,4 @@
+/* $OpenBSD: key.c,v 1.68 2006/11/06 21:25:28 markus Exp $ */
 /*
  * read_bignum():
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -31,17 +32,22 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
+
 #include "includes.h"
-RCSID("$OpenBSD: key.c,v 1.58 2005/06/17 02:44:32 djm Exp $");
+
+#include <sys/types.h>
 
 #include <openssl/evp.h>
 
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+
 #include "xmalloc.h"
 #include "key.h"
 #include "rsa.h"
 #include "uuencode.h"
 #include "buffer.h"
-#include "bufaux.h"
 #include "log.h"
 
 Key *
@@ -50,9 +56,8 @@ key_new(int type)
         Key *k;
         RSA *rsa;
         DSA *dsa;
-        k = xmalloc(sizeof(*k));
+        k = xcalloc(1, sizeof(*k));
         k->type = type;
-        k->flags = 0;
         k->dsa = NULL;
         k->rsa = NULL;
         switch (k->type) {
@@ -123,6 +128,8 @@ key_new_private(int type)
 void
 key_free(Key *k)
 {
+        if (k == NULL)
+                fatal("key_free: key is NULL");
         switch (k->type) {
         case KEY_RSA1:
         case KEY_RSA:
@@ -155,14 +162,12 @@ key_equal(const Key *a, const Key *b)
                 return a->rsa != NULL && b->rsa != NULL &&
                     BN_cmp(a->rsa->e, b->rsa->e) == 0 &&
                     BN_cmp(a->rsa->n, b->rsa->n) == 0;
-                break;
         case KEY_DSA:
                 return a->dsa != NULL && b->dsa != NULL &&
                     BN_cmp(a->dsa->p, b->dsa->p) == 0 &&
                     BN_cmp(a->dsa->q, b->dsa->q) == 0 &&
                     BN_cmp(a->dsa->g, b->dsa->g) == 0 &&
                     BN_cmp(a->dsa->pub_key, b->dsa->pub_key) == 0;
-                break;
         default:
                 fatal("key_equal: bad key type %d", a->type);
                 break;
@@ -209,7 +214,6 @@ key_fingerprint_raw(const Key *k, enum fp_type dgst_type,
                 break;
         case KEY_UNSPEC:
                 return retval;
-                break;
         default:
                 fatal("key_fingerprint_raw: bad key type %d", k->type);
                 break;
@@ -233,8 +237,7 @@ key_fingerprint_hex(u_char *dgst_raw, u_int dgst_raw_len)
         char *retval;
         u_int i;
 
-        retval = xmalloc(dgst_raw_len * 3 + 1);
-        retval[0] = '\0';
+        retval = xcalloc(1, dgst_raw_len * 3 + 1);
         for (i = 0; i < dgst_raw_len; i++) {
                 char hex[4];
                 snprintf(hex, sizeof(hex), "%02x:", dgst_raw[i]);
@@ -256,7 +259,7 @@ key_fingerprint_bubblebabble(u_char *dgst_raw, u_int dgst_raw_len)
         char *retval;
 
         rounds = (dgst_raw_len / 2) + 1;
-        retval = xmalloc(sizeof(char) * (rounds*6));
+        retval = xcalloc((rounds * 6), sizeof(char));
         retval[j++] = 'x';
         for (i = 0; i < rounds; i++) {
                 u_int idx0, idx1, idx2, idx3, idx4;
@@ -530,13 +533,10 @@ key_type(const Key *k)
         switch (k->type) {
         case KEY_RSA1:
                 return "RSA1";
-                break;
         case KEY_RSA:
                 return "RSA";
-                break;
         case KEY_DSA:
                 return "DSA";
-                break;
         }
         return "unknown";
 }
@@ -547,10 +547,8 @@ key_ssh_name(const Key *k)
         switch (k->type) {
         case KEY_RSA:
                 return "ssh-rsa";
-                break;
         case KEY_DSA:
                 return "ssh-dss";
-                break;
         }
         return "ssh-unknown";
 }
@@ -562,10 +560,8 @@ key_size(const Key *k)
         case KEY_RSA1:
         case KEY_RSA:
                 return BN_num_bits(k->rsa->n);
-                break;
         case KEY_DSA:
                 return BN_num_bits(k->dsa->p);
-                break;
         }
         return 0;
 }
@@ -574,6 +570,7 @@ static RSA *
 rsa_generate_private_key(u_int bits)
 {
         RSA *private;
+
         private = RSA_generate_key(bits, 35, NULL, NULL);
         if (private == NULL)
                 fatal("rsa_generate_private_key: key generation failed.");
@@ -584,6 +581,7 @@ static DSA*
 dsa_generate_private_key(u_int bits)
 {
         DSA *private = DSA_generate_parameters(bits, NULL, 0, NULL, NULL, NULL, NULL);
+
         if (private == NULL)
                 fatal("dsa_generate_private_key: DSA_generate_parameters failed");
         if (!DSA_generate_key(private))
@@ -619,16 +617,18 @@ key_from_private(const Key *k)
         switch (k->type) {
         case KEY_DSA:
                 n = key_new(k->type);
-                BN_copy(n->dsa->p, k->dsa->p);
-                BN_copy(n->dsa->q, k->dsa->q);
-                BN_copy(n->dsa->g, k->dsa->g);
-                BN_copy(n->dsa->pub_key, k->dsa->pub_key);
+                if ((BN_copy(n->dsa->p, k->dsa->p) == NULL) ||
+                    (BN_copy(n->dsa->q, k->dsa->q) == NULL) ||
+                    (BN_copy(n->dsa->g, k->dsa->g) == NULL) ||
+                    (BN_copy(n->dsa->pub_key, k->dsa->pub_key) == NULL))
+                        fatal("key_from_private: BN_copy failed");
                 break;
         case KEY_RSA:
         case KEY_RSA1:
                 n = key_new(k->type);
-                BN_copy(n->rsa->n, k->rsa->n);
-                BN_copy(n->rsa->e, k->rsa->e);
+                if ((BN_copy(n->rsa->n, k->rsa->n) == NULL) ||
+                    (BN_copy(n->rsa->e, k->rsa->e) == NULL))
+                        fatal("key_from_private: BN_copy failed");
                 break;
         default:
                 fatal("key_from_private: unknown type %d", k->type);
@@ -793,14 +793,11 @@ key_sign(
         switch (key->type) {
         case KEY_DSA:
                 return ssh_dss_sign(key, sigp, lenp, data, datalen);
-                break;
         case KEY_RSA:
                 return ssh_rsa_sign(key, sigp, lenp, data, datalen);
-                break;
         default:
                 error("key_sign: invalid key type %d", key->type);
                 return -1;
-                break;
         }
 }
 
@@ -820,14 +817,11 @@ key_verify(
         switch (key->type) {
         case KEY_DSA:
                 return ssh_dss_verify(key, signature, signaturelen, data, datalen);
-                break;
         case KEY_RSA:
                 return ssh_rsa_verify(key, signature, signaturelen, data, datalen);
-                break;
         default:
                 error("key_verify: invalid key type %d", key->type);
                 return -1;
-                break;
         }
 }
 
@@ -837,7 +831,7 @@ key_demote(const Key *k)
 {
         Key *pk;
 
-        pk = xmalloc(sizeof(*pk));
+        pk = xcalloc(1, sizeof(*pk));
         pk->type = k->type;
         pk->flags = k->flags;
         pk->dsa = NULL;