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144 lines
3.7 KiB
144 lines
3.7 KiB
From 1664902525a1c3771b4d8b3ccab7ea1ba6b2bdd1 Mon Sep 17 00:00:00 2001
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From: Holger Liebig <holger.liebig@ts.fujitsu.com>
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Date: Tue, 4 Apr 2017 20:43:05 +0200
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Subject: [PATCH 4/4] ID:480 - Call EVP_CIPHER_CTX_free() instead of
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EVP_CIPHER_CTX_cleanup()
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Call EVP_CIPHER_CTX_free() instead of EVP_CIPHER_CTX_cleanup() to fix memory
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leak.
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---
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src/plugins/lanplus/lanplus_crypt_impl.c | 44 +++++++++++++++++---------------
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1 file changed, 23 insertions(+), 21 deletions(-)
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diff --git a/src/plugins/lanplus/lanplus_crypt_impl.c b/src/plugins/lanplus/lanplus_crypt_impl.c
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index 0e330c1..9652a5e 100644
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--- a/src/plugins/lanplus/lanplus_crypt_impl.c
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+++ b/src/plugins/lanplus/lanplus_crypt_impl.c
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@@ -165,13 +165,6 @@ lanplus_encrypt_aes_cbc_128(const uint8_t * iv,
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uint32_t * bytes_written)
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{
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EVP_CIPHER_CTX *ctx = NULL;
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- ctx = EVP_CIPHER_CTX_new();
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- if (ctx == NULL) {
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- *bytes_written = 0;
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- return;
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- }
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- EVP_EncryptInit_ex(ctx, EVP_aes_128_cbc(), NULL, key, iv);
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- EVP_CIPHER_CTX_set_padding(ctx, 0);
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*bytes_written = 0;
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@@ -185,6 +178,14 @@ lanplus_encrypt_aes_cbc_128(const uint8_t * iv,
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printbuf(input, input_length, "encrypting this data");
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}
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+ ctx = EVP_CIPHER_CTX_new();
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+ if (ctx == NULL) {
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+ lprintf(LOG_DEBUG, "ERROR: EVP_CIPHER_CTX_new() failed");
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+ return;
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+ }
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+ EVP_CIPHER_CTX_init(ctx);
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+ EVP_EncryptInit_ex(ctx, EVP_aes_128_cbc(), NULL, key, iv);
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+ EVP_CIPHER_CTX_set_padding(ctx, 0);
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/*
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* The default implementation adds a whole block of padding if the input
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@@ -198,7 +199,6 @@ lanplus_encrypt_aes_cbc_128(const uint8_t * iv,
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{
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/* Error */
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*bytes_written = 0;
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- return;
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}
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else
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{
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@@ -206,16 +206,17 @@ lanplus_encrypt_aes_cbc_128(const uint8_t * iv,
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if(!EVP_EncryptFinal_ex(ctx, output + *bytes_written, (int *)&tmplen))
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{
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+ /* Error */
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*bytes_written = 0;
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- return; /* Error */
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}
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else
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{
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/* Success */
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*bytes_written += tmplen;
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- EVP_CIPHER_CTX_cleanup(ctx);
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}
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}
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+ /* performs cleanup and free */
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+ EVP_CIPHER_CTX_free(ctx);
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}
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@@ -243,13 +244,6 @@ lanplus_decrypt_aes_cbc_128(const uint8_t * iv,
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uint32_t * bytes_written)
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{
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EVP_CIPHER_CTX *ctx = NULL;
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- ctx = EVP_CIPHER_CTX_new();
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- if (ctx == NULL) {
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- *bytes_written = 0;
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- return;
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- }
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- EVP_DecryptInit_ex(ctx, EVP_aes_128_cbc(), NULL, key, iv);
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- EVP_CIPHER_CTX_set_padding(ctx, 0);
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if (verbose >= 5)
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{
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@@ -258,12 +252,20 @@ lanplus_decrypt_aes_cbc_128(const uint8_t * iv,
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printbuf(input, input_length, "decrypting this data");
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}
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-
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*bytes_written = 0;
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if (input_length == 0)
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return;
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+ ctx = EVP_CIPHER_CTX_new();
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+ if (ctx == NULL) {
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+ lprintf(LOG_DEBUG, "ERROR: EVP_CIPHER_CTX_new() failed");
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+ return;
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+ }
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+ EVP_CIPHER_CTX_init(ctx);
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+ EVP_DecryptInit_ex(ctx, EVP_aes_128_cbc(), NULL, key, iv);
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+ EVP_CIPHER_CTX_set_padding(ctx, 0);
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+
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/*
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* The default implementation adds a whole block of padding if the input
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* data is perfectly aligned. We would like to keep that from happening.
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@@ -277,7 +279,6 @@ lanplus_decrypt_aes_cbc_128(const uint8_t * iv,
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/* Error */
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lprintf(LOG_DEBUG, "ERROR: decrypt update failed");
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*bytes_written = 0;
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- return;
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}
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else
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{
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@@ -285,20 +286,21 @@ lanplus_decrypt_aes_cbc_128(const uint8_t * iv,
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if (!EVP_DecryptFinal_ex(ctx, output + *bytes_written, (int *)&tmplen))
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{
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+ /* Error */
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char buffer[1000];
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ERR_error_string(ERR_get_error(), buffer);
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lprintf(LOG_DEBUG, "the ERR error %s", buffer);
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lprintf(LOG_DEBUG, "ERROR: decrypt final failed");
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*bytes_written = 0;
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- return; /* Error */
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}
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else
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{
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/* Success */
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*bytes_written += tmplen;
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- EVP_CIPHER_CTX_cleanup(ctx);
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}
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}
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+ /* performs cleanup and free */
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+ EVP_CIPHER_CTX_free(ctx);
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if (verbose >= 5)
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{
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--
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2.16.1
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