Make sure all error conditions in RSA_padding_add_PKCS1_PSS_mgf1() cause

EVP_MD_CTX_cleanup() to be called.

1 files changed, 4 insertions, 3 deletions

diff --git a/src/lib/libcrypto/rsa/rsa_pss.c b/src/lib/libcrypto/rsa/rsa_pss.c
index e18ca632aa..f841b2f8a3 100644
--- a/src/lib/libcrypto/rsa/rsa_pss.c
+++ b/src/lib/libcrypto/rsa/rsa_pss.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: rsa_pss.c,v 1.9 2014/07/11 08:44:49 jsing Exp $ */
+/* $OpenBSD: rsa_pss.c,v 1.10 2014/07/13 12:53:46 miod Exp $ */
 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project 2005.
  */
@@ -199,6 +199,8 @@ RSA_padding_add_PKCS1_PSS_mgf1(RSA *rsa, unsigned char *EM,
         unsigned char *H, *salt = NULL, *p;
         EVP_MD_CTX ctx;
 
+        EVP_MD_CTX_init(&ctx);
+
         if (mgf1Hash == NULL)
                 mgf1Hash = Hash;
 
@@ -246,7 +248,6 @@ RSA_padding_add_PKCS1_PSS_mgf1(RSA *rsa, unsigned char *EM,
         }
         maskedDBLen = emLen - hLen - 1;
         H = EM + maskedDBLen;
-        EVP_MD_CTX_init(&ctx);
         if (!EVP_DigestInit_ex(&ctx, Hash, NULL) ||
             !EVP_DigestUpdate(&ctx, zeroes, sizeof zeroes) ||
             !EVP_DigestUpdate(&ctx, mHash, hLen))
@@ -255,7 +256,6 @@ RSA_padding_add_PKCS1_PSS_mgf1(RSA *rsa, unsigned char *EM,
                 goto err;
         if (!EVP_DigestFinal_ex(&ctx, H, NULL))
                 goto err;
-        EVP_MD_CTX_cleanup(&ctx);
 
         /* Generate dbMask in place then perform XOR on it */
         if (PKCS1_MGF1(EM, maskedDBLen, H, hLen, mgf1Hash))
@@ -284,6 +284,7 @@ RSA_padding_add_PKCS1_PSS_mgf1(RSA *rsa, unsigned char *EM,
 
 err:
         free(salt);
+        EVP_MD_CTX_cleanup(&ctx);
 
         return ret;
 }