diff --git a/Makefile b/Makefile index 89f8913..4e67726 100644 --- a/Makefile +++ b/Makefile @@ -1,6 +1,7 @@ -PRG = cast5 +PRG = md5 # cryptotest -OBJ = main-cast5-test.o debug.o uart.o serial-tools.o cast5.o +OBJ = main-md5-test.o debug.o uart.o serial-tools.o md5.o +# main-cast5-test.o debug.o uart.o serial-tools.o cast5.o # main.o debug.o uart.o serial-tools.o sha256-asm.o xtea-asm.o arcfour-asm.o prng.o cast5.o MCU_TARGET = atmega32 OPTIMIZE = -Os diff --git a/md5.c b/md5.c index d26c806..766fbb4 100644 --- a/md5.c +++ b/md5.c @@ -8,8 +8,156 @@ */ #include "md5.h" + #include "md5_sbox.h" + #include "uart.h" #include + #include +void md5_init(md5_ctx_t *s){ + s->counter = 0; + s->a[0] = 0x67452301; + s->a[1] = 0xefcdab89; + s->a[2] = 0x98badcfe; + s->a[3] = 0x10325476; +} - - \ No newline at end of file +uint32_t md5_F(uint32_t x, uint32_t y, uint32_t z){ + return ((x&y)|((~x)&z)); +} + +uint32_t md5_G(uint32_t x, uint32_t y, uint32_t z){ + return ((x&z)|((~z)&y)); +} + +uint32_t md5_H(uint32_t x, uint32_t y, uint32_t z){ + return (x^y^z); +} + +uint32_t md5_I(uint32_t x, uint32_t y, uint32_t z){ + return (y ^ (x | (~z))); +} + +typedef uint32_t md5_func_t(uint32_t, uint32_t, uint32_t); + +#define ROTL32(x,n) ((x)<<(n) | (x)>>(32-(n))) + +void md5_core(uint32_t* a, uint8_t as, void* block, uint8_t k, uint8_t s, uint8_t i, uint8_t fi){ + uint32_t t; + md5_func_t* funcs[]={md5_F, md5_G, md5_H, md5_I}; + char funcc[]={'*', '-', '+', '~'}; + as &= 0x3; + /* a = b + ((a + F(b,c,d) + X[k] + T[i]) <<< s). */ + 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(']'); + t = a[as] + funcs[fi](a[(as+1)&3], a[(as+2)&3], a[(as+3)&3]) + ((uint8_t*)block)[k] + md5_T[i] ; + a[as]=a[(as+1)&3] + ROTL32(t, s); +} + +void md5_nextBlock(md5_ctx_t *state, void* block){ + uint32_t a[4]; + uint8_t m,n,i=0; + /* this requires other mixed sboxes */ + 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"); + + 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}; + for(m=0;m<4;++m){ + for(n=0;n<4;++n){ + md5_core(a, 4-n, block, m*4+n, s1t[n],i++,0); +/* t = a[(4-s)&3] + md5_F(a[(4-s-1)&3],a[(4-s-2)&3],a[(4-s-3)&3]) + + ((uint8_t*)block)[s+4*k] + md5_T[i++]; + a[(4-s)&3] = a[(4-s-1)&3] + ROTL32(t, s*5+7); +*/ } + } + /* round 2 */ + uint8_t s2t[]={5,9,14,20}; + for(m=0;m<4;++m){ + for(n=0;n<4;++n){ + md5_core(a, 4-n, block, (1+m*4+n*5)&0xf, s2t[n],i++,1); + } + } +/* for(k=0;k<4;++k){ + for(s=0;s<4;++s){ + t = a[(4-s)&3] + md5_G(a[(4-s-1)&3],a[(4-s-2)&3],a[(4-s-3)&3]) + + ((uint8_t*)block)[((1+s*5) +(k*4))&0xf] + md5_T[i++]; + a[(4-s)&3] = a[(4-s-1)&3] + ROTL32(t, s2t[s]); + } + } +*/ + /* round 3 */ + uint8_t s3t[]={4,11,16,23}; + for(m=0;m<4;++m){ + for(n=0;n<4;++n){ + md5_core(a, 4-n, block, (5-m*4+n*3)&0xf, s3t[n],i++,2); + } + } +/* for(k=0;k<4;++k){ + for(s=0;s<4;++s){ + t = a[(4-s)&3] + md5_H(a[(4-s-1)&3],a[(4-s-2)&3],a[(4-s-3)&3]) + + ((uint8_t*)block)[((5+s*3)-(k*4))&0xf] + md5_T[i++]; + a[(4-s)&3] = a[(4-s-1)&3] + ROTL32(t, s3t[s]); + } + } */ + /* round 4 */ + uint8_t s4t[]={6,10,15,21}; + for(m=0;m<4;++m){ + for(n=0;n<4;++n){ + md5_core(a, 4-n, block, (0-m*4+n*7)&0xf, s4t[n],i++,3); + } + } +/* for(k=0;k<4;++k){ + for(s=0;s<4;++s){ + t = a[(4-s)&3] + md5_I(a[(4-s-1)&3],a[(4-s-2)&3],a[(4-s-3)&3]) + + ((uint8_t*)block)[((s*7)-(k*4))&0xf] + md5_T[i++]; + a[(4-s)&3] = a[(4-s-1)&3] + ROTL32(t, s4t[s]); + } + } */ + state->a[0] += a[0]; + state->a[1] += a[1]; + state->a[2] += a[2]; + state->a[3] += a[3]; + state->counter++; +} + +void md5_lastBlock(md5_ctx_t *state, void* block, uint16_t length){ + uint16_t l; + uint8_t b[64]; + while (length >= 512){ + md5_nextBlock(state, block); + length -= 512; + block += 512/8; + } + memset(b, 0, 64); + memcpy(b, block, length/8); + /* insert padding one */ + l=length/8; + if(length%8){ + uint8_t t; + t = ((uint8_t*)block)[l]; + t |= (0x80>>(length%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; + md5_nextBlock(state, b); +} diff --git a/md5.h b/md5.h index bd91f23..24fb6d5 100644 --- a/md5.h +++ b/md5.h @@ -11,4 +11,16 @@ #ifndef MD5_H_ #define MD5_H_ +#include + +typedef struct md5_ctx_st { + uint32_t a[4]; + uint32_t counter; +} md5_ctx_t; + + +void md5_init(md5_ctx_t *s); +void md5_nextBlock(md5_ctx_t *state, void* block); +void md5_lastBlock(md5_ctx_t *state, void* block, uint16_t length); + #endif /*MD5_H_*/ diff --git a/md5_sbox.h b/md5_sbox.h new file mode 100644 index 0000000..6f5f7f2 --- /dev/null +++ b/md5_sbox.h @@ -0,0 +1,19 @@ +#ifndef MD5_SBOX_H_ +#define MD5_SBOX_H_ + +uint32_t md5_T[]={ + 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}; + +#endif /*MD5_SBOX_H_*/