Use correct length for EVP CFB mode ciphers.

The BLOCK_CIPHER_* macros contained a bug where the total length is passed
to the underlying cipher implementation, rather than the length of the
current chunk. Correct this and use the chunk length instead.

Should address the remaining issues reported by Coverity.

ok tb@

1 files changed, 2 insertions, 2 deletions

diff --git a/src/lib/libcrypto/evp/e_rc2.c b/src/lib/libcrypto/evp/e_rc2.c
index 72e582d5e0..4f92365e7e 100644
--- a/src/lib/libcrypto/evp/e_rc2.c
+++ b/src/lib/libcrypto/evp/e_rc2.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: e_rc2.c,v 1.17 2022/09/04 15:45:25 jsing Exp $ */
+/* $OpenBSD: e_rc2.c,v 1.18 2022/09/10 17:39:47 jsing Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -116,7 +116,7 @@ rc2_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *i
                 chunk = inl;
 
         while (inl && inl >= chunk) {
-                RC2_cfb64_encrypt(in, out, (long)inl, &((EVP_RC2_KEY *)ctx->cipher_data)->ks, ctx->iv, &ctx->num, ctx->encrypt);
+                RC2_cfb64_encrypt(in, out, (long)chunk, &((EVP_RC2_KEY *)ctx->cipher_data)->ks, ctx->iv, &ctx->num, ctx->encrypt);
                 inl -= chunk;
                 in += chunk;
                 out += chunk;