#undef DEBUG
-void md5_core(uint32_t* a, void* block, uint8_t as, uint8_t s, uint8_t i, uint8_t fi);
-/*
-#define ROTL32(x,n) (((x)<<(n)) | ((x)>>(32-(n))))
-
-static
-void md5_core(uint32_t* a, void* block, uint8_t as, uint8_t s, uint8_t i, uint8_t fi){
- uint32_t t;
- md5_func_t* funcs[]={md5_F, md5_G, md5_H, md5_I};
- as &= 0x3;
- // * a = b + ((a + F(b,c,d) + X[k] + T[i]) <<< s). * /
-#ifdef DEBUG
- char funcc[]={'*', '-', '+', '~'};
- uart_putstr("\r\n DBG: md5_core [");
- uart_putc(funcc[fi]);
- uart_hexdump(&as, 1); uart_putc(' ');
- uart_hexdump(&k, 1); uart_putc(' ');
- uart_hexdump(&s, 1); uart_putc(' ');
- uart_hexdump(&i, 1); uart_putc(']');
-#endif
- t = a[as] + funcs[fi](a[(as+1)&3], a[(as+2)&3], a[(as+3)&3]) + *((uint32_t*)block) + md5_T[i] ;
- a[as]=a[(as+1)&3] + ROTL32(t, s);
+void md5_ctx2hash(md5_hash_t* dest, const md5_ctx_t* state){
+ memcpy(dest, state->a, MD5_HASH_BYTES);
}
-*/
-
-#if 0
-void md5_nextBlock(md5_ctx_t *state, void* block){
- uint32_t a[4];
- uint8_t m,n,i=0;
- /* this requires other mixed sboxes */
-#ifdef DEBUG
- uart_putstr("\r\n DBG: md5_nextBlock: block:\r\n");
- uart_hexdump(block, 16); uart_putstr("\r\n");
- uart_hexdump(block+16, 16); uart_putstr("\r\n");
- uart_hexdump(block+32, 16); uart_putstr("\r\n");
- uart_hexdump(block+48, 16); uart_putstr("\r\n");
-#endif
-
- a[0]=state->a[0];
- a[1]=state->a[1];
- a[2]=state->a[2];
- a[3]=state->a[3];
- /* round 1 */
- uint8_t s1t[]={7,12,17,22}; // 1,-1 1,4 2,-1 3,-2
- for(m=0;m<4;++m){
- for(n=0;n<4;++n){
- md5_core(a, &(((uint32_t*)block)[m*4+n]), 4-n, s1t[n],i++,0);
- }
- }
- /* round 2 */
- uint8_t s2t[]={5,9,14,20}; // 1,-3 1,1 2,-2 2,4
- for(m=0;m<4;++m){
- for(n=0;n<4;++n){
- md5_core(a, &(((uint32_t*)block)[(1+m*4+n*5)&0xf]), 4-n, s2t[n],i++,1);
- }
- }
- /* round 3 */
- uint8_t s3t[]={4,11,16,23}; // 0,4 1,3 2,0 3,-1
- for(m=0;m<4;++m){
- for(n=0;n<4;++n){
- md5_core(a, &(((uint32_t*)block)[(5-m*4+n*3)&0xf]), 4-n, s3t[n],i++,2);
- }
- }
- /* round 4 */
- uint8_t s4t[]={6,10,15,21}; // 1,-2 1,2 2,-1 3,-3
- for(m=0;m<4;++m){
- for(n=0;n<4;++n){
- md5_core(a, &(((uint32_t*)block)[(0-m*4+n*7)&0xf]), 4-n, s4t[n],i++,3);
- }
+void md5(md5_hash_t* dest, const void* msg, uint32_t length_b){
+ md5_ctx_t ctx;
+ md5_init(&ctx);
+ while(length_b>=MD5_BLOCK_BITS){
+ md5_nextBlock(&ctx, msg);
+ msg = (uint8_t*)msg + MD5_BLOCK_BYTES;
+ length_b -= MD5_BLOCK_BITS;
}
- state->a[0] += a[0];
- state->a[1] += a[1];
- state->a[2] += a[2];
- state->a[3] += a[3];
- state->counter++;
+ md5_lastBlock(&ctx, msg, length_b);
+ md5_ctx2hash(dest, &ctx);
}
-#endif
-
-void md5_lastBlock(md5_ctx_t *state, void* block, uint16_t length_b){
- uint16_t l;
- uint8_t b[64];
- while (length_b >= 512){
- md5_nextBlock(state, block);
- length_b -= 512;
- block = ((uint8_t*)block) + 512/8;
- }
- memset(b, 0, 64);
- memcpy(b, block, length_b/8);
- /* insert padding one */
- l=length_b/8;
- if(length_b%8){
- uint8_t t;
- t = ((uint8_t*)block)[l];
- t |= (0x80>>(length_b%8));
- b[l]=t;
- }else{
- b[l]=0x80;
- }
- /* insert length value */
- if(l+sizeof(uint64_t) >= 512/8){
- md5_nextBlock(state, b);
- state->counter--;
- memset(b, 0, 64);
- }
- *((uint64_t*)&b[64-sizeof(uint64_t)]) = (state->counter * 512) + length_b;
- md5_nextBlock(state, b);
-}
-