| problema calloc() en c++
Hola, estoy tratando de usar un md5sum en c++.
Si lo compilo en C, funciona correctamente, pero a la hora de hacerlo en c++, tengo dos errores de lo mismo:
buf = calloc(256,64);
invalid conversion from `void*' to `byte*'
y
s = calloc(sizeof(*s),1);
invalid conversion from `void*' to `MD5state*'
Muestro el código entero por si vale de algo:
Código:
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
typedef unsigned int uint;
typedef unsigned char byte;
extern int enc64(char*,byte*,int);
enum
{
S11= 7,
S12= 12,
S13= 17,
S14= 22,
S21= 5,
S22= 9,
S23= 14,
S24= 20,
S31= 4,
S32= 11,
S33= 16,
S34= 23,
S41= 6,
S42= 10,
S43= 15,
S44= 21
};
typedef struct Table
{
uint sin; /* integer part of 4294967296 times abs(sin(i)) */
byte x; /* index into data block */
byte rot; /* amount to rotate left by */
}Table;
Table tab[] =
{
/* round 1 */
{ 0xd76aa478, 0, S11},
{ 0xe8c7b756, 1, S12},
{ 0x242070db, 2, S13},
{ 0xc1bdceee, 3, S14},
{ 0xf57c0faf, 4, S11},
{ 0x4787c62a, 5, S12},
{ 0xa8304613, 6, S13},
{ 0xfd469501, 7, S14},
{ 0x698098d8, 8, S11},
{ 0x8b44f7af, 9, S12},
{ 0xffff5bb1, 10, S13},
{ 0x895cd7be, 11, S14},
{ 0x6b901122, 12, S11},
{ 0xfd987193, 13, S12},
{ 0xa679438e, 14, S13},
{ 0x49b40821, 15, S14},
/* round 2 */
{ 0xf61e2562, 1, S21},
{ 0xc040b340, 6, S22},
{ 0x265e5a51, 11, S23},
{ 0xe9b6c7aa, 0, S24},
{ 0xd62f105d, 5, S21},
{ 0x2441453, 10, S22},
{ 0xd8a1e681, 15, S23},
{ 0xe7d3fbc8, 4, S24},
{ 0x21e1cde6, 9, S21},
{ 0xc33707d6, 14, S22},
{ 0xf4d50d87, 3, S23},
{ 0x455a14ed, 8, S24},
{ 0xa9e3e905, 13, S21},
{ 0xfcefa3f8, 2, S22},
{ 0x676f02d9, 7, S23},
{ 0x8d2a4c8a, 12, S24},
/* round 3 */
{ 0xfffa3942, 5, S31},
{ 0x8771f681, 8, S32},
{ 0x6d9d6122, 11, S33},
{ 0xfde5380c, 14, S34},
{ 0xa4beea44, 1, S31},
{ 0x4bdecfa9, 4, S32},
{ 0xf6bb4b60, 7, S33},
{ 0xbebfbc70, 10, S34},
{ 0x289b7ec6, 13, S31},
{ 0xeaa127fa, 0, S32},
{ 0xd4ef3085, 3, S33},
{ 0x4881d05, 6, S34},
{ 0xd9d4d039, 9, S31},
{ 0xe6db99e5, 12, S32},
{ 0x1fa27cf8, 15, S33},
{ 0xc4ac5665, 2, S34},
/* round 4 */
{ 0xf4292244, 0, S41},
{ 0x432aff97, 7, S42},
{ 0xab9423a7, 14, S43},
{ 0xfc93a039, 5, S44},
{ 0x655b59c3, 12, S41},
{ 0x8f0ccc92, 3, S42},
{ 0xffeff47d, 10, S43},
{ 0x85845dd1, 1, S44},
{ 0x6fa87e4f, 8, S41},
{ 0xfe2ce6e0, 15, S42},
{ 0xa3014314, 6, S43},
{ 0x4e0811a1, 13, S44},
{ 0xf7537e82, 4, S41},
{ 0xbd3af235, 11, S42},
{ 0x2ad7d2bb, 2, S43},
{ 0xeb86d391, 9, S44},
};
typedef struct MD5state
{
uint len;
uint state[4];
}MD5state;
MD5state *nil;
int debug;
int hex; /* print in hex? (instead of default base64) */
void encode(byte*, uint*, uint);
void decode(uint*, byte*, uint);
MD5state* md5(byte*, uint, byte*, MD5state*);
void sum(FILE*, char*);
int
main(int argc, char **argv)
{
int c;
FILE *fd;
argv++; argc--;
if(argc>0 && strcmp(argv[0],"-d")==0){
debug++;
argv++; argc--;
}
if(argc>0 && strcmp(argv[0],"-x")==0){
hex++;
argv++; argc--;
}
if(argc == 0)
sum(stdin,0);
else for(c = 0; c < argc; c++){
fd = fopen(argv[c],"r");
if(fd==NULL){
fprintf(stderr, "md5sum: can't open %s\n", argv[c]);
continue;
}
sum(fd, argv[c]);
fclose(fd);
}
}
void
sum(FILE *fd, char *name)
{
byte *buf;
byte digest[16];
char pr64[25];
int i, n;
MD5state *s;
s = nil;
n = 0;
buf = calloc(256,64);
for(;;){
i = fread(buf+n, 1, 128*64-n, fd);
if(i <= 0)
break;
n += i;
if(n & 0x3f)
continue;
s = md5(buf, n, 0, s);
n = 0;
}
md5(buf, n, digest, s);
if(hex){
for(i=0;i<16;i++) printf("%.2X", digest[i]);
}else{
enc64(pr64,digest,sizeof(digest));
pr64[22] = '\0'; /* chop trailing == */
printf("%s",pr64);
}
if(name)
printf("\t%s", name);
printf("\n");
free(buf);
}
/*
* I require len to be a multiple of 64 for all but
* the last call
*/
MD5state*
md5(byte *p, uint len, byte *digest, MD5state *s)
{
uint a, b, c, d, tmp;
uint i, done;
Table *t;
byte *end;
uint x[16];
if(s == nil){
s = calloc(sizeof(*s),1);
if(s == nil)
return nil;
/* seed the state, these constants would look nicer big-endian */
s->state[0] = 0x67452301;
s->state[1] = 0xefcdab89;
s->state[2] = 0x98badcfe;
s->state[3] = 0x10325476;
}
s->len += len;
i = len & 0x3f;
if(i || len == 0){
done = 1;
/* pad the input, assume there's room */
if(i < 56)
i = 56 - i;
else
i = 120 - i;
if(i > 0){
memset(p + len, 0, i);
p[len] = 0x80;
}
len += i;
/* append the count */
x[0] = s->len<<3;
x[1] = s->len>>29;
encode(p+len, x, 8);
} else
done = 0;
for(end = p+len; p < end; p += 64){
a = s->state[0];
b = s->state[1];
c = s->state[2];
d = s->state[3];
decode(x, p, 64);
for(i = 0; i < 64; i++){
t = tab + i;
switch(i>>4){
case 0:
a += (b & c) | (~b & d);
break;
case 1:
a += (b & d) | (c & ~d);
break;
case 2:
a += b ^ c ^ d;
break;
case 3:
a += c ^ (b | ~d);
break;
}
a += x[t->x] + t->sin;
a = (a << t->rot) | (a >> (32 - t->rot));
a += b;
/* rotate variables */
tmp = d;
d = c;
c = b;
b = a;
a = tmp;
}
s->state[0] += a;
s->state[1] += b;
s->state[2] += c;
s->state[3] += d;
}
/* return result */
if(done){
encode(digest, s->state, 16);
free(s);
return nil;
}
return s;
}
/*
* encodes input (uint) into output (byte). Assumes len is
* a multiple of 4.
*/
void
encode(byte *output, uint *input, uint len)
{
uint x;
byte *e;
for(e = output + len; output < e;) {
x = *input++;
*output++ = x;
*output++ = x >> 8;
*output++ = x >> 16;
*output++ = x >> 24;
}
}
/*
* decodes input (byte) into output (uint). Assumes len is
* a multiple of 4.
*/
void
decode(uint *output, byte *input, uint len)
{
byte *e;
for(e = input+len; input < e; input += 4)
*output++ = input[0] | (input[1] << 8) |
(input[2] << 16) | (input[3] << 24);
}
typedef unsigned long ulong;
typedef unsigned char uchar;
static uchar t64d[256];
static char t64e[64];
static void
init64(void)
{
int c, i;
memset(t64d, 255, 256);
memset(t64e, '=', 64);
i = 0;
for(c = 'A'; c <= 'Z'; c++){
t64e[i] = c;
t64d[c] = i++;
}
for(c = 'a'; c <= 'z'; c++){
t64e[i] = c;
t64d[c] = i++;
}
for(c = '0'; c <= '9'; c++){
t64e[i] = c;
t64d[c] = i++;
}
t64e[i] = '+';
t64d['+'] = i++;
t64e[i] = '/';
t64d['/'] = i;
}
int
dec64(uchar *out, char *in, int n)
{
ulong b24;
uchar *start = out;
int i, c;
if(t64e[0] == 0)
init64();
b24 = 0;
i = 0;
while(n-- > 0){
c = t64d[*in++];
if(c == 255)
continue;
switch(i){
case 0:
b24 = c<<18;
break;
case 1:
b24 |= c<<12;
break;
case 2:
b24 |= c<<6;
break;
case 3:
b24 |= c;
*out++ = b24>>16;
*out++ = b24>>8;
*out++ = b24;
i = -1;
break;
}
i++;
}
switch(i){
case 2:
*out++ = b24>>16;
break;
case 3:
*out++ = b24>>16;
*out++ = b24>>8;
break;
}
*out = 0;
return out - start;
}
int
enc64(char *out, uchar *in, int n)
{
int i;
ulong b24;
char *start = out;
if(t64e[0] == 0)
init64();
for(i = n/3; i > 0; i--){
b24 = (*in++)<<16;
b24 |= (*in++)<<8;
b24 |= *in++;
*out++ = t64e[(b24>>18)];
*out++ = t64e[(b24>>12)&0x3f];
*out++ = t64e[(b24>>6)&0x3f];
*out++ = t64e[(b24)&0x3f];
}
switch(n%3){
case 2:
b24 = (*in++)<<16;
b24 |= (*in)<<8;
*out++ = t64e[(b24>>18)];
*out++ = t64e[(b24>>12)&0x3f];
*out++ = t64e[(b24>>6)&0x3f];
break;
case 1:
b24 = (*in)<<16;
*out++ = t64e[(b24>>18)];
*out++ = t64e[(b24>>12)&0x3f];
*out++ = '=';
break;
}
*out++ = '=';
*out = 0;
return out - start;
}
Muchas gracias de antemano |