From 1420f9e41420590522ef80b1c926cbd249aeee57 Mon Sep 17 00:00:00 2001
From: tb <tb@openbsd.org>
Date: Wed, 20 Dec 2023 11:31:17 +0000
Subject: [PATCH] Rename buf_len into partial_len in EVP_CIPHER_CTX

suggested by jsing
---
 lib/libcrypto/evp/evp_enc.c   | 18 +++++++++---------
 lib/libcrypto/evp/evp_local.h |  4 ++--
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/lib/libcrypto/evp/evp_enc.c b/lib/libcrypto/evp/evp_enc.c
index 2bcef15fc2b..ee1c12b70cd 100644
--- a/lib/libcrypto/evp/evp_enc.c
+++ b/lib/libcrypto/evp/evp_enc.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: evp_enc.c,v 1.66 2023/12/20 11:01:34 tb Exp $ */
+/* $OpenBSD: evp_enc.c,v 1.67 2023/12/20 11:31:17 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -184,7 +184,7 @@ EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ENGINE *impl,
 		if (!ctx->cipher->init(ctx, key, iv, enc))
 			return 0;
 	}
-	ctx->buf_len = 0;
+	ctx->partial_len = 0;
 	ctx->final_used = 0;
 	ctx->block_mask = ctx->cipher->block_size - 1;
 	return 1;
@@ -298,7 +298,7 @@ EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
 {
 	const int block_size = ctx->cipher->block_size;
 	const int block_mask = ctx->block_mask;
-	int buf_offset = ctx->buf_len;
+	int buf_offset = ctx->partial_len;
 	int len = 0, total_len = 0;
 
 	*outl = 0;
@@ -326,7 +326,7 @@ EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
 
 		if ((buf_avail = block_size - buf_offset) > inl) {
 			memcpy(&ctx->buf[buf_offset], in, inl);
-			ctx->buf_len += inl;
+			ctx->partial_len += inl;
 			return 1;
 		}
 
@@ -366,7 +366,7 @@ EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
 
 	if (buf_offset != 0)
 		memcpy(ctx->buf, &in[inl], buf_offset);
-	ctx->buf_len = buf_offset;
+	ctx->partial_len = buf_offset;
 
 	*outl = total_len;
 
@@ -383,7 +383,7 @@ int
 EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
 {
 	const int block_size = ctx->cipher->block_size;
-	int buf_offset = ctx->buf_len;
+	int buf_offset = ctx->partial_len;
 	int pad;
 
 	*outl = 0;
@@ -441,7 +441,7 @@ EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
 
 	if (ctx->final_used) {
 		/*
-		 * final_used is only set if buf_len is 0. Therefore the maximum
+		 * final_used is only set if partial_len is 0. Therefore the maximum
 		 * length output from EVP_EncryptUpdate() is inl & ~block_mask.
 		 * Ensure (inl & ~block_mask) + block_size doesn't overflow.
 		 */
@@ -461,7 +461,7 @@ EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
 		return 0;
 
 	/* Keep copy of last block if a multiple of block_size was decrypted. */
-	if (block_size > 1 && ctx->buf_len == 0) {
+	if (block_size > 1 && ctx->partial_len == 0) {
 		if (len < block_size)
 			return 0;
 		len -= block_size;
@@ -488,7 +488,7 @@ int
 EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
 {
 	const int block_size = ctx->cipher->block_size;
-	int buf_offset = ctx->buf_len;
+	int buf_offset = ctx->partial_len;
 	int i, pad, plain_len;
 
 	*outl = 0;
diff --git a/lib/libcrypto/evp/evp_local.h b/lib/libcrypto/evp/evp_local.h
index 5df1733cbc9..7bc266250c3 100644
--- a/lib/libcrypto/evp/evp_local.h
+++ b/lib/libcrypto/evp/evp_local.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: evp_local.h,v 1.6 2023/11/29 21:35:57 tb Exp $ */
+/* $OpenBSD: evp_local.h,v 1.7 2023/12/20 11:31:17 tb Exp $ */
 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project 2000.
  */
@@ -168,7 +168,7 @@ struct evp_cipher_st {
 struct evp_cipher_ctx_st {
 	const EVP_CIPHER *cipher;
 	int encrypt;		/* encrypt or decrypt */
-	int buf_len;		/* number we have left */
+	int partial_len;	/* number of bytes written to buf */
 
 	unsigned char  oiv[EVP_MAX_IV_LENGTH];	/* original iv */
 	unsigned char  iv[EVP_MAX_IV_LENGTH];	/* working iv */
-- 
2.20.1