Add a checkpoint message to alerts stream (#14847)

* pull aclk schemas

* resolve capas

* handle checkpoints and removed from health

* build with disable-cloud

* codacy 1

* misc changes

* one more char in hash

* free buffer

* change topic

* misc fixes

* skip removed alert variables

* change hash functions

* use create and destroy for compatibility with older openssl

2 files changed, 26 insertions, 0 deletions

diff --git a/libnetdata/libnetdata.c b/libnetdata/libnetdata.c
index 3029b08d1c..a8f26c33b8 100644
--- a/libnetdata/libnetdata.c
+++ b/libnetdata/libnetdata.c
@@ -2009,3 +2009,28 @@ void timing_action(TIMING_ACTION action, TIMING_STEP step) {
         }
     }
 }
+
+int hash256_string(const unsigned char *string, size_t size, char *hash) {
+    EVP_MD_CTX *ctx;
+    ctx = EVP_MD_CTX_create();
+
+    if (!ctx)
+        return 0;
+
+    if (!EVP_DigestInit(ctx, EVP_sha256())) {
+        EVP_MD_CTX_destroy(ctx);
+        return 0;
+    }
+
+    if (!EVP_DigestUpdate(ctx, string, size)) {
+        EVP_MD_CTX_destroy(ctx);
+        return 0;
+    }
+
+    if (!EVP_DigestFinal(ctx, (unsigned char *)hash, NULL)) {
+        EVP_MD_CTX_destroy(ctx);
+        return 0;
+    }
+
+    return 1;
+}
diff --git a/libnetdata/libnetdata.h b/libnetdata/libnetdata.h
index 1f164e3a07..c244949308 100644
--- a/libnetdata/libnetdata.h
+++ b/libnetdata/libnetdata.h
@@ -782,6 +782,7 @@ typedef enum {
 #endif
 void timing_action(TIMING_ACTION action, TIMING_STEP step);
 
+int hash256_string(const unsigned char *string, size_t size, char *hash);
 # ifdef __cplusplus
 }
 # endif