1 files changed, 33 insertions, 0 deletions
diff --git a/2016/5b.c b/2016/5b.c
new file mode 100644
index 0000000..4d575fb
--- /dev/null
+++ b/2016/5b.c
@@ -0,0 +1,33 @@
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+#include <openssl/md5.h>
+
+int main(void){
+	int counter=0;
+	char inbuf[100];
+	unsigned char outbuf[16];
+	int prelen;
+	scanf("%s%n",inbuf,&prelen);
+
+	char passbuf[9];
+	strcpy(passbuf,"________");
+	fprintf(stderr,"%s",passbuf);
+
+	for(int i=0;i<8;i++){
+		while(true){
+			int len=prelen+sprintf(inbuf+prelen,"%d",counter);
+			counter++;
+			MD5((const unsigned char*)inbuf,len,outbuf);
+			if(outbuf[0]==0&&outbuf[1]==0&&(outbuf[2]>>4)==0){
+				if((outbuf[2]&0xf)<8&&passbuf[outbuf[2]&0xf]=='_'){
+					passbuf[outbuf[2]&0xf]="0123456789abcdef"[outbuf[3]>>4];
+					fprintf(stderr,"\r%s",passbuf);
+					break;
+				}
+			}
+		}
+	}
+	fputc('\n',stderr);
+	printf("%s\n",passbuf);
+}