Mention updated config files.

[rsync.git] / checksum.c

diff --git a/checksum.c b/checksum.c
index b5363bca6c3d93c95793cb32c48eaee25ee4ecb9..cb21882c5695dff6c3447e1e6da89c4840722162 100644 (file)
--- a/checksum.c
+++ b/checksum.c
@@ -3,7 +3,7 @@
  *
  * Copyright (C) 1996 Andrew Tridgell
  * Copyright (C) 1996 Paul Mackerras
- * Copyright (C) 2004-2022 Wayne Davison
+ * Copyright (C) 2004-2023 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -59,12 +59,6 @@ struct name_num_item valid_checksums_items[] = {
        { CSUM_MD4, NNI_BUILTIN|NNI_EVP, "md4", NULL },
 #ifdef SHA_DIGEST_LENGTH
        { CSUM_SHA1, NNI_EVP, "sha1", NULL },
-#endif
-#ifdef SHA256_DIGEST_LENGTH
-       { CSUM_SHA256, NNI_EVP, "sha256", NULL },
-#endif
-#ifdef SHA512_DIGEST_LENGTH
-       { CSUM_SHA512, NNI_EVP, "sha512", NULL },
 #endif
        { CSUM_NONE, 0, "none", NULL },
        { 0, 0, NULL, NULL }
@@ -100,15 +94,16 @@ struct name_num_item implied_checksum_md5 =
     { CSUM_MD5, NNI_BUILTIN, "md5", NULL };
 
 struct name_num_item *xfer_sum_nni; /* used for the transfer checksum2 computations */
-const EVP_MD *xfer_sum_evp_md;
 int xfer_sum_len;
 struct name_num_item *file_sum_nni; /* used for the pre-transfer --checksum computations */
-const EVP_MD *file_sum_evp_md;
 int file_sum_len, file_sum_extra_cnt;
 
 #ifdef USE_OPENSSL
+const EVP_MD *xfer_sum_evp_md;
+const EVP_MD *file_sum_evp_md;
 EVP_MD_CTX *ctx_evp = NULL;
 #endif
+
 static int initialized_choices = 0;
 
 struct name_num_item *parse_csum_name(const char *name, int len)
@@ -147,9 +142,9 @@ struct name_num_item *parse_csum_name(const char *name, int len)
        return nni;
 }
 
+#ifdef USE_OPENSSL
 static const EVP_MD *csum_evp_md(struct name_num_item *nni)
 {
-#ifdef USE_OPENSSL
        const EVP_MD *emd;
        if (!(nni->flags & NNI_EVP))
                return NULL;
@@ -159,7 +154,7 @@ static const EVP_MD *csum_evp_md(struct name_num_item *nni)
                emd = NULL;
        else
 #endif
-               emd = EVP_get_digestbyname(nni->name);                                               
+               emd = EVP_get_digestbyname(nni->name);
        if (emd && !(nni->flags & NNI_EVP_OK)) { /* Make sure it works before we advertise it */
                if (!ctx_evp && !(ctx_evp = EVP_MD_CTX_create()))
                        out_of_memory("csum_evp_md");
@@ -173,10 +168,8 @@ static const EVP_MD *csum_evp_md(struct name_num_item *nni)
        if (!emd)
                nni->flags &= ~NNI_EVP;
        return emd;
-#else
-       return NULL;
-#endif
 }
+#endif
 
 void parse_checksum_choice(int final_call)
 {
@@ -194,8 +187,10 @@ void parse_checksum_choice(int final_call)
        }
        xfer_sum_len = csum_len_for_type(xfer_sum_nni->num, 0);
        file_sum_len = csum_len_for_type(file_sum_nni->num, 0);
+#ifdef USE_OPENSSL
        xfer_sum_evp_md = csum_evp_md(xfer_sum_nni);
        file_sum_evp_md = csum_evp_md(file_sum_nni);
+#endif
 
        file_sum_extra_cnt = (file_sum_len + EXTRA_LEN - 1) / EXTRA_LEN;
 
@@ -305,6 +300,7 @@ uint32 get_checksum1(char *buf1, int32 len)
 }
 #endif
 
+/* The "sum" buffer must be at least MAX_DIGEST_LEN bytes! */
 void get_checksum2(char *buf, int32 len, char *sum)
 {
 #ifdef USE_OPENSSL
@@ -551,9 +547,15 @@ static XXH64_state_t* xxh64_state;
 static XXH3_state_t* xxh3_state;
 #endif
 static struct name_num_item *cur_sum_nni;
-static const EVP_MD *cur_sum_evp_md;
 int cur_sum_len;
 
+#ifdef USE_OPENSSL
+static const EVP_MD *cur_sum_evp_md;
+#endif
+
+/* Initialize a hash digest accumulator.  Data is supplied via
+ * sum_update() and the resulting binary digest is retrieved via
+ * sum_end().  This only supports one active sum at a time. */
 int sum_init(struct name_num_item *nni, int seed)
 {
        char s[4];
@@ -562,7 +564,9 @@ int sum_init(struct name_num_item *nni, int seed)
                nni = parse_csum_name(NULL, 0);
        cur_sum_nni = nni;
        cur_sum_len = csum_len_for_type(nni->num, 0);
+#ifdef USE_OPENSSL
        cur_sum_evp_md = csum_evp_md(nni);
+#endif
 
 #ifdef USE_OPENSSL
        if (cur_sum_evp_md) {
@@ -615,14 +619,7 @@ int sum_init(struct name_num_item *nni, int seed)
        return cur_sum_len;
 }
 
-/**
- * Feed data into an MD4 accumulator, md.  The results may be
- * retrieved using sum_end().  md is used for different purposes at
- * different points during execution.
- *
- * @todo Perhaps get rid of md and just pass in the address each time.
- * Very slightly clearer and slower.
- **/
+/* Feed data into a hash digest accumulator. */
 void sum_update(const char *p, int32 len)
 {
 #ifdef USE_OPENSSL
@@ -784,11 +781,17 @@ static void verify_digest(struct name_num_item *nni, BOOL check_auth_list)
 
 void init_checksum_choices()
 {
+#if defined SUPPORT_XXH3 || defined USE_OPENSSL
        struct name_num_item *nni;
+#endif
 
        if (initialized_choices)
                return;
 
+#if defined USE_OPENSSL && OPENSSL_VERSION_NUMBER < 0x10100000L
+       OpenSSL_add_all_algorithms();
+#endif
+
 #if defined SUPPORT_XXH3 || defined USE_OPENSSL
        for (nni = valid_checksums.list; nni->name; nni++)
                verify_digest(nni, True);