From: Ulf Möller <ulf@openssl.org>
Date: Wed, 6 Jun 2001 17:23:23 +0000 (+0000)
Subject: move check to avoid memory leak.
X-Git-Tag: OpenSSL_0_9_6c~182^2~126
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=8ca2ae775d418b44b0206788744ca0e5f5d9dc3d;p=oweals%2Fopenssl.git

move check to avoid memory leak.
---

diff --git a/crypto/rsa/rsa_oaep.c b/crypto/rsa/rsa_oaep.c
index a3361dc3d7..64b59ee121 100644
--- a/crypto/rsa/rsa_oaep.c
+++ b/crypto/rsa/rsa_oaep.c
@@ -102,6 +102,14 @@ int RSA_padding_check_PKCS1_OAEP(unsigned char *to, int tlen,
 	return (-1);
 	}
 
+    lzero = num - flen;
+    if (lzero < 0)
+	{
+	RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_OAEP, RSA_R_OAEP_DECODING_ERROR);
+	return (-1);
+	}
+    maskeddb = from - lzero + SHA_DIGEST_LENGTH;
+    
     dblen = num - SHA_DIGEST_LENGTH;
     db = OPENSSL_malloc(dblen);
     if (db == NULL)
@@ -110,14 +118,6 @@ int RSA_padding_check_PKCS1_OAEP(unsigned char *to, int tlen,
 	return (-1);
 	}
 
-    lzero = num - flen;
-    if (lzero < 0)
-    {
-    RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_OAEP, RSA_R_OAEP_DECODING_ERROR);
-    return (-1);
-    }
-    maskeddb = from - lzero + SHA_DIGEST_LENGTH;
-    
     MGF1(seed, SHA_DIGEST_LENGTH, maskeddb, dblen);
     for (i = lzero; i < SHA_DIGEST_LENGTH; i++)
 	seed[i] ^= from[i - lzero];