add md5 support

plugins/utils.c

@@ -336,3 +336,127 @@ int is_file(const char* f)
 	struct stat st;
 	return !(stat(f, &st) == -1);
 }
+ 
+// These vars will contain the hash
+ 
+void md5(uint8_t *initial_msg, size_t initial_len, char* buff) {
+	uint32_t h0, h1, h2, h3;
+	char tmp[80];
+    uint8_t *msg = NULL;
+    uint32_t r[] = {7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22,
+                    5,  9, 14, 20, 5,  9, 14, 20, 5,  9, 14, 20, 5,  9, 14, 20,
+                    4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23,
+                    6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21};
+    // Use binary integer part of the sines of integers (in radians) as constants// Initialize variables:
+    uint32_t k[] = {
+        0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
+        0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
+        0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
+        0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
+        0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,
+        0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8,
+        0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
+        0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
+        0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
+        0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
+        0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05,
+        0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
+        0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,
+        0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
+        0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
+        0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391};
+ 
+    h0 = 0x67452301;
+    h1 = 0xefcdab89;
+    h2 = 0x98badcfe;
+    h3 = 0x10325476;
+ 
+    // Pre-processing: adding a single 1 bit
+    //append "1" bit to message    
+    /* Notice: the input bytes are considered as bits strings,
+       where the first bit is the most significant bit of the byte.[37] */
+ 
+    // Pre-processing: padding with zeros
+    //append "0" bit until message length in bit ≡ 448 (mod 512)
+    //append length mod (2 pow 64) to message
+ 
+    int new_len;
+    for(new_len = initial_len*8 + 1; new_len%512!=448; new_len++);
+    new_len /= 8;
+ 
+    msg = calloc(new_len + 64, 1); // also appends "0" bits 
+                                   // (we alloc also 64 extra bytes...)
+    memcpy(msg, initial_msg, initial_len);
+    msg[initial_len] = 128; // write the "1" bit
+ 
+    uint32_t bits_len = 8*initial_len; // note, we append the len
+    memcpy(msg + new_len, &bits_len, 4);           // in bits at the end of the buffer
+ 
+    // Process the message in successive 512-bit chunks:
+    //for each 512-bit chunk of message:
+    int offset;
+    for(offset=0; offset<new_len; offset += (512/8)) {
+ 
+        // break chunk into sixteen 32-bit words w[j], 0 ≤ j ≤ 15
+        uint32_t *w = (uint32_t *) (msg + offset);
+ 
+        // Initialize hash value for this chunk:
+        uint32_t a = h0;
+        uint32_t b = h1;
+        uint32_t c = h2;
+        uint32_t d = h3;
+ 
+        // Main loop:
+        uint32_t i;
+        for(i = 0; i<64; i++) {
+ 
+            uint32_t f, g;
+ 
+             if (i < 16) {
+                f = (b & c) | ((~b) & d);
+                g = i;
+            } else if (i < 32) {
+                f = (d & b) | ((~d) & c);
+                g = (5*i + 1) % 16;
+            } else if (i < 48) {
+                f = b ^ c ^ d;
+                g = (3*i + 5) % 16;          
+            } else {
+                f = c ^ (b | (~d));
+                g = (7*i) % 16;
+            }
+
+            uint32_t temp = d;
+            d = c;
+            c = b;
+            //printf("rotateLeft(%x + %x + %x + %x, %d)\n", a, f, k[i], w[g], r[i]);
+            b = b + LEFTROTATE((a + f + k[i] + w[g]), r[i]);
+            a = temp;
+ 
+        }
+ 
+        // Add this chunk's hash to result so far:
+ 	   
+        h0 += a;
+        h1 += b;
+        h2 += c;
+        h3 += d;
+		
+    }
+	uint8_t *p;
+	p=(uint8_t *)&h0;
+	sprintf(tmp,"%2.2x%2.2x%2.2x%2.2x", p[0], p[1], p[2], p[3], h0);
+	strcpy(buff, tmp);
+	p=(uint8_t *)&h1;
+	sprintf(tmp,"%2.2x%2.2x%2.2x%2.2x", p[0], p[1], p[2], p[3], h1);
+	strcat(buff,tmp);
+	p=(uint8_t *)&h2;
+	sprintf(tmp,"%2.2x%2.2x%2.2x%2.2x", p[0], p[1], p[2], p[3], h2);
+    strcat(buff,tmp);
+	p=(uint8_t *)&h3;
+	sprintf(tmp,"%2.2x%2.2x%2.2x%2.2x", p[0], p[1], p[2], p[3], h3);
+	strcat(buff,tmp);
+    // cleanup
+    free(msg);
+ 
+}

plugins/utils.h

@@ -35,7 +35,9 @@ THE SOFTWARE.
 #include <ctype.h>
 #include <regex.h>
 #include <time.h>
+#include <stdint.h>
 
+#define LEFTROTATE(x, c) (((x) << (c)) | ((x) >> (32 - (c))))
 #define EQU(a,b) (strcmp(a,b) == 0)
 #define IEQU(a,b) (strcasecmp(a,b) == 0)
 #define IS_INT(a) (match_int(a))
@@ -82,4 +84,5 @@ char to_hex(char code);
 unsigned hash(const char*, int);
 unsigned simple_hash(const char*);
 int is_file(const char* f);
+void md5(uint8_t *, size_t , char*);
 #endif