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[Openvpn-devel,v2,03/20,OSSL,3.0] Implement DES ECB encrypt via EVP_CIPHER api

Message ID 20211019182332.613155-5-arne@rfc2549.org
State Superseded
Headers show
Series OpenSSL 3.0 improvements for OpenVPN | expand

Commit Message

Arne Schwabe Oct. 19, 2021, 7:23 a.m. UTC 
Even though DES is super outdated and also NTLM is super outdated,
eliminating the warnings for OpenSSL 3.0 is still a step in the right
direction and using the correct APIs.

Signed-off-by: Arne Schwabe <arne@rfc2549.org>
---
 src/openvpn/crypto_openssl.c | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)
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Patch

diff --git a/src/openvpn/crypto_openssl.c b/src/openvpn/crypto_openssl.c
index 1c800df7f..021698f12 100644
--- a/src/openvpn/crypto_openssl.c
+++ b/src/openvpn/crypto_openssl.c
@@ -879,10 +879,26 @@  cipher_des_encrypt_ecb(const unsigned char key[DES_KEY_LENGTH],
                        unsigned char src[DES_KEY_LENGTH],
                        unsigned char dst[DES_KEY_LENGTH])
 {
-    DES_key_schedule sched;
+    EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new();
+    if (!ctx)
+    {
+        crypto_msg(M_FATAL, "%s: EVP_CIPHER_CTX_new() failed", __func__);
+    }
+    if (!EVP_EncryptInit_ex(ctx, EVP_bf_ecb(), NULL, key, 0))
+    {
+        crypto_msg(M_FATAL, "%s: EVP_EncryptInit_ex() failed", __func__);
+    }
 
-    DES_set_key_unchecked((DES_cblock *)key, &sched);
-    DES_ecb_encrypt((DES_cblock *)src, (DES_cblock *)dst, &sched, DES_ENCRYPT);
+    int len;
+    if(!EVP_EncryptUpdate(ctx, dst, &len, src, DES_KEY_LENGTH))
+    {
+        crypto_msg(M_FATAL, "%s: EVP_EncryptUpdate() failed", __func__);
+    }
+
+    if (!EVP_EncryptFinal(ctx, dst + len, &len))
+    {
+        crypto_msg(M_FATAL, "%s: EVP_EncryptFinal() failed", __func__);
+    }
 }
 
 /*