4 files changed, 11 insertions, 7 deletions
diff --git a/Cryptlib/OpenSSL/crypto/bn/bn_exp.c b/Cryptlib/OpenSSL/crypto/bn/bn_exp.c
index 1670f01d..195a7867 100644
--- a/Cryptlib/OpenSSL/crypto/bn/bn_exp.c
+++ b/Cryptlib/OpenSSL/crypto/bn/bn_exp.c
@@ -180,8 +180,9 @@ int BN_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx)
                 goto err;
         }
     }
-    if (r != rr)
-        BN_copy(r, rr);
+    if (r != rr && BN_copy(r, rr) == NULL)
+        goto err;
+
     ret = 1;
  err:
     BN_CTX_end(ctx);
diff --git a/Cryptlib/OpenSSL/crypto/bn/bn_mul.c b/Cryptlib/OpenSSL/crypto/bn/bn_mul.c
index b174850b..3c618dc3 100644
--- a/Cryptlib/OpenSSL/crypto/bn/bn_mul.c
+++ b/Cryptlib/OpenSSL/crypto/bn/bn_mul.c
@@ -1083,8 +1083,9 @@ int BN_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
  end:
 #endif
     bn_correct_top(rr);
-    if (r != rr)
-        BN_copy(r, rr);
+    if (r != rr && BN_copy(r, rr) == NULL)
+        goto err;
+
     ret = 1;
  err:
     bn_check_top(r);
diff --git a/Cryptlib/OpenSSL/crypto/bn/bn_prime.c b/Cryptlib/OpenSSL/crypto/bn/bn_prime.c
index ad641c37..4dab3bba 100644
--- a/Cryptlib/OpenSSL/crypto/bn/bn_prime.c
+++ b/Cryptlib/OpenSSL/crypto/bn/bn_prime.c
@@ -288,7 +288,8 @@ int BN_is_prime_fasttest_ex(const BIGNUM *a, int checks, BN_CTX *ctx_passed,
         BIGNUM *t;
         if ((t = BN_CTX_get(ctx)) == NULL)
             goto err;
-        BN_copy(t, a);
+        if (BN_copy(t, a) == NULL)
+            goto err;
         t->neg = 0;
         A = t;
     } else
diff --git a/Cryptlib/OpenSSL/crypto/bn/bn_sqr.c b/Cryptlib/OpenSSL/crypto/bn/bn_sqr.c
index 3ca69879..256d26e8 100644
--- a/Cryptlib/OpenSSL/crypto/bn/bn_sqr.c
+++ b/Cryptlib/OpenSSL/crypto/bn/bn_sqr.c
@@ -143,8 +143,9 @@ int BN_sqr(BIGNUM *r, const BIGNUM *a, BN_CTX *ctx)
         rr->top = max - 1;
     else
         rr->top = max;
-    if (rr != r)
-        BN_copy(r, rr);
+    if (r != rr && BN_copy(r, rr) == NULL)
+        goto err;
+
     ret = 1;
  err:
     bn_check_top(rr);