Added hash function

server/chord.c

@@ -8,11 +8,26 @@
 #include <sys/socket.h> 
 #include <arpa/inet.h> 
 #include <netinet/in.h> 
+#include <openssl/md5.h>
 
 #define MAXLOCATIONS 32
 
 int keyToId(char * key){
-    //To be filled
+    unsigned char digest[16];
+    MD5_CTX context;
+    unsigned intHashValue;
+    unsigned char *hexVal;
+    MD5_Init(&context);
+    MD5_Update(&context, key, strlen(key));
+    MD5_Final(digest, &context);
+    hexVal = malloc(sizeof(char));
+    int twoDigits;
+    for(int i =0; i<2;i++){
+        sprintf(hexVal+i,"%02X",digest[i]);
+        sscanf(hexVal+i,"%x",&twoDigits);
+        intHashValue = intHashValue*1000 + twoDigits; // The two digits can also have 3 numerical digits hence *1000
+    }
+    return intHashValue;
 }
 
 int nodeToId(char ip[], int port){

server/hash.c

+#include<stdlib.h>
+#include<stdio.h>
+#include<stdbool.h>
+#include<string.h>
+#include <unistd.h> 
+#include <string.h> 
+#include <sys/types.h> 
+#include <sys/socket.h> 
+#include <arpa/inet.h> 
+#include <netinet/in.h> 
+#include <openssl/md5.h>
+
+#define MAXLOCATIONS 32
+
+MD5_CTX context;
+
+int keyToId(char * key){
+    unsigned char digest[16];
+    MD5_Init(&context);
+    MD5_Update(&context, key, strlen(key));
+    MD5_Final(digest, &context);
+    unsigned intHashValue;
+    unsigned char *hexVal;
+    hexVal = malloc(sizeof(char));
+    int TwoDigits;
+    for(int i =0; i<2;i++){
+        sprintf(hexVal+i,"%02X",digest[i]);
+        sscanf(hexVal+i,"%x",&TwoDigits);
+        intHashValue = intHashValue*1000 + TwoDigits;
+    }
+    printf("%d\n",intHashValue);
+}
+
+int main(int argc, char* argv[]) {
+    keyToId(argv[1]);
+}
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