3 files changed, 33 insertions, 21 deletions

diff --git a/src/lib/libcrypto/rsa/rsa_eay.c b/src/lib/libcrypto/rsa/rsa_eay.c
index 128269a81a..f9f620ae23 100644
--- a/src/lib/libcrypto/rsa/rsa_eay.c
+++ b/src/lib/libcrypto/rsa/rsa_eay.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: rsa_eay.c,v 1.47 2017/04/28 22:38:51 beck Exp $ */
+/* $OpenBSD: rsa_eay.c,v 1.48 2017/04/28 22:46:40 beck Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -244,8 +244,10 @@ err:
                 BN_CTX_end(ctx);
                 BN_CTX_free(ctx);
         }
-        freezero(buf, num);
-
+        if (buf != NULL) {
+                explicit_bzero(buf, num);
+                free(buf);
+        }
         return r;
 }
 
@@ -466,8 +468,10 @@ err:
                 BN_CTX_end(ctx);
                 BN_CTX_free(ctx);
         }
-        freezero(buf, num);
-
+        if (buf != NULL) {
+                explicit_bzero(buf, num);
+                free(buf);
+        }
         return r;
 }
 
@@ -593,8 +597,10 @@ err:
                 BN_CTX_end(ctx);
                 BN_CTX_free(ctx);
         }
-        freezero(buf, num);
-
+        if (buf != NULL) {
+                explicit_bzero(buf, num);
+                free(buf);
+        }
         return r;
 }
 
@@ -694,8 +700,10 @@ err:
                 BN_CTX_end(ctx);
                 BN_CTX_free(ctx);
         }
-        freezero(buf, num);
-
+        if (buf != NULL) {
+                explicit_bzero(buf, num);
+                free(buf);
+        }
         return r;
 }
 
diff --git a/src/lib/libcrypto/rsa/rsa_saos.c b/src/lib/libcrypto/rsa/rsa_saos.c
index 50522b972a..10184b6c18 100644
--- a/src/lib/libcrypto/rsa/rsa_saos.c
+++ b/src/lib/libcrypto/rsa/rsa_saos.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: rsa_saos.c,v 1.21 2017/04/28 22:38:51 beck Exp $ */
+/* $OpenBSD: rsa_saos.c,v 1.22 2017/04/28 22:46:40 beck Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -96,8 +96,8 @@ RSA_sign_ASN1_OCTET_STRING(int type, const unsigned char *m, unsigned int m_len,
         else
                 *siglen = i;
 
-        freezero(s, (unsigned int)j + 1);
-
+        explicit_bzero(s, (unsigned int)j + 1);
+        free(s);
         return ret;
 }
 
@@ -137,7 +137,9 @@ RSA_verify_ASN1_OCTET_STRING(int dtype, const unsigned char *m,
                 ret = 1;
 err:
         ASN1_OCTET_STRING_free(sig);
-        freezero(s, siglen);
-
+        if (s != NULL) {
+                explicit_bzero(s, (unsigned int)siglen);
+                free(s);
+        }
         return ret;
 }
diff --git a/src/lib/libcrypto/rsa/rsa_sign.c b/src/lib/libcrypto/rsa/rsa_sign.c
index 618ec155cc..818b88c604 100644
--- a/src/lib/libcrypto/rsa/rsa_sign.c
+++ b/src/lib/libcrypto/rsa/rsa_sign.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: rsa_sign.c,v 1.27 2017/04/28 22:38:51 beck Exp $ */
+/* $OpenBSD: rsa_sign.c,v 1.28 2017/04/28 22:46:40 beck Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -135,9 +135,10 @@ RSA_sign(int type, const unsigned char *m, unsigned int m_len,
         else
                 *siglen = i;
 
-        if (type != NID_md5_sha1)
-                freezero(tmps, (unsigned int)j + 1);
-
+        if (type != NID_md5_sha1) {
+                explicit_bzero(tmps, (unsigned int)j + 1);
+                free(tmps);
+        }
         return (ret);
 }
 
@@ -233,9 +234,10 @@ int_rsa_verify(int dtype, const unsigned char *m, unsigned int m_len,
 err:
         if (sig != NULL)
                 X509_SIG_free(sig);
-
-        freezero(s, (unsigned int)siglen);
-
+        if (s != NULL) {
+                explicit_bzero(s, (unsigned int)siglen);
+                free(s);
+        }
         return ret;
 }