free NULL cleanup 7

[openssl.git] / crypto / asn1 / a_int.c

diff --git a/crypto/asn1/a_int.c b/crypto/asn1/a_int.c
index 65fac75698c21d20da17093ccdd1353a55ee3654..b5246a65c39e1ecd38cfebb2d15fa32b4ac83a6b 100644 (file)
--- a/crypto/asn1/a_int.c
+++ b/crypto/asn1/a_int.c
@@ -60,6 +60,7 @@
 #include "cryptlib.h"
 #include <openssl/asn1.h>
 #include <openssl/bn.h>
+#include "asn1_locl.h"
 
 ASN1_INTEGER *ASN1_INTEGER_dup(const ASN1_INTEGER *x)
 {
@@ -124,6 +125,8 @@ int i2c_ASN1_INTEGER(ASN1_INTEGER *a, unsigned char **pp)
     else {
         ret = a->length;
         i = a->data[0];
+        if (ret == 1 && i == 0)
+            neg = 0;
         if (!neg && (i > 127)) {
             pad = 1;
             pb = 0;
@@ -162,7 +165,7 @@ int i2c_ASN1_INTEGER(ASN1_INTEGER *a, unsigned char **pp)
         p += a->length - 1;
         i = a->length;
         /* Copy zeros to destination as long as source is zero */
-        while (!*n) {
+        while (!*n && i > 1) {
             *(p--) = 0;
             n--;
             i--;
@@ -203,7 +206,7 @@ ASN1_INTEGER *c2i_ASN1_INTEGER(ASN1_INTEGER **a, const unsigned char **pp,
      * We must OPENSSL_malloc stuff, even for 0 bytes otherwise it signifies
      * a missing NULL parameter.
      */
-    s = (unsigned char *)OPENSSL_malloc((int)len + 1);
+    s = OPENSSL_malloc((int)len + 1);
     if (s == NULL) {
         i = ERR_R_MALLOC_FAILURE;
         goto err;
@@ -309,7 +312,7 @@ ASN1_INTEGER *d2i_ASN1_UINTEGER(ASN1_INTEGER **a, const unsigned char **pp,
      * We must OPENSSL_malloc stuff, even for 0 bytes otherwise it signifies
      * a missing NULL parameter.
      */
-    s = (unsigned char *)OPENSSL_malloc((int)len + 1);
+    s = OPENSSL_malloc((int)len + 1);
     if (s == NULL) {
         i = ERR_R_MALLOC_FAILURE;
         goto err;
@@ -348,8 +351,7 @@ int ASN1_INTEGER_set(ASN1_INTEGER *a, long v)
     if (a->length < (int)(sizeof(long) + 1)) {
         if (a->data != NULL)
             OPENSSL_free(a->data);
-        if ((a->data =
-             (unsigned char *)OPENSSL_malloc(sizeof(long) + 1)) != NULL)
+        if ((a->data = OPENSSL_malloc(sizeof(long) + 1)) != NULL)
             memset((char *)a->data, 0, sizeof(long) + 1);
     }
     if (a->data == NULL) {
@@ -417,7 +419,7 @@ ASN1_INTEGER *BN_to_ASN1_INTEGER(const BIGNUM *bn, ASN1_INTEGER *ai)
         ASN1err(ASN1_F_BN_TO_ASN1_INTEGER, ERR_R_NESTED_ASN1_ERROR);
         goto err;
     }
-    if (BN_is_negative(bn))
+    if (BN_is_negative(bn) && !BN_is_zero(bn))
         ret->type = V_ASN1_NEG_INTEGER;
     else
         ret->type = V_ASN1_INTEGER;