325N/A

325N/A#include "lib.h"

325N/A#include "safe-memset.h"

325N/A#include "md5.h"

325N/A

325N/A#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))

325N/A#define G(x, y, z) ((y) ^ ((z) & ((x) ^ (y))))

325N/A#define H(x, y, z) ((x) ^ (y) ^ (z))

325N/A#define I(x, y, z) ((y) ^ ((x) | ~(z)))

325N/A

325N/A#define STEP(f, a, b, c, d, x, t, s) \

325N/A (a) += f((b), (c), (d)) + (x) + (t); \

325N/A (a) = (((a) << (s)) | (((a) & 0xffffffff) >> (32 - (s)))); \

325N/A (a) += (b);

325N/A

#if defined(__i386__) || defined(__x86_64__) || defined(__vax__)

#define SET(n) \

(*(const uint32_t *)&ptr[(n) * 4])

#define GET(n) \

SET(n)

#else

#define SET(n) \

(ctx->block[(n)] = \

(uint_fast32_t)ptr[(n) * 4] | \

((uint_fast32_t)ptr[(n) * 4 + 1] << 8) | \

((uint_fast32_t)ptr[(n) * 4 + 2] << 16) | \

((uint_fast32_t)ptr[(n) * 4 + 3] << 24))

#define GET(n) \

(ctx->block[(n)])

#endif

static const void * ATTR_NOWARN_UNUSED_RESULT ATTR_UNSIGNED_WRAPS

body(struct md5_context *ctx, const void *data, size_t size)

{

const unsigned char *ptr;

uint_fast32_t a, b, c, d;

uint_fast32_t saved_a, saved_b, saved_c, saved_d;

ptr = data;

a = ctx->a;

b = ctx->b;

c = ctx->c;

d = ctx->d;

do {

saved_a = a;

saved_b = b;

saved_c = c;

saved_d = d;

STEP(F, a, b, c, d, SET(0), 0xd76aa478, 7)

STEP(F, d, a, b, c, SET(1), 0xe8c7b756, 12)

STEP(F, c, d, a, b, SET(2), 0x242070db, 17)

STEP(F, b, c, d, a, SET(3), 0xc1bdceee, 22)

STEP(F, a, b, c, d, SET(4), 0xf57c0faf, 7)

STEP(F, d, a, b, c, SET(5), 0x4787c62a, 12)

STEP(F, c, d, a, b, SET(6), 0xa8304613, 17)

STEP(F, b, c, d, a, SET(7), 0xfd469501, 22)

STEP(F, a, b, c, d, SET(8), 0x698098d8, 7)

STEP(F, d, a, b, c, SET(9), 0x8b44f7af, 12)

STEP(F, c, d, a, b, SET(10), 0xffff5bb1, 17)

STEP(F, b, c, d, a, SET(11), 0x895cd7be, 22)

STEP(F, a, b, c, d, SET(12), 0x6b901122, 7)

STEP(F, d, a, b, c, SET(13), 0xfd987193, 12)

STEP(F, c, d, a, b, SET(14), 0xa679438e, 17)

STEP(F, b, c, d, a, SET(15), 0x49b40821, 22)

STEP(G, a, b, c, d, GET(1), 0xf61e2562, 5)

STEP(G, d, a, b, c, GET(6), 0xc040b340, 9)

STEP(G, c, d, a, b, GET(11), 0x265e5a51, 14)

STEP(G, b, c, d, a, GET(0), 0xe9b6c7aa, 20)

STEP(G, a, b, c, d, GET(5), 0xd62f105d, 5)

STEP(G, d, a, b, c, GET(10), 0x02441453, 9)

STEP(G, c, d, a, b, GET(15), 0xd8a1e681, 14)

STEP(G, b, c, d, a, GET(4), 0xe7d3fbc8, 20)

STEP(G, a, b, c, d, GET(9), 0x21e1cde6, 5)

STEP(G, d, a, b, c, GET(14), 0xc33707d6, 9)

STEP(G, c, d, a, b, GET(3), 0xf4d50d87, 14)

STEP(G, b, c, d, a, GET(8), 0x455a14ed, 20)

STEP(G, a, b, c, d, GET(13), 0xa9e3e905, 5)

STEP(G, d, a, b, c, GET(2), 0xfcefa3f8, 9)

STEP(G, c, d, a, b, GET(7), 0x676f02d9, 14)

STEP(G, b, c, d, a, GET(12), 0x8d2a4c8a, 20)

STEP(H, a, b, c, d, GET(5), 0xfffa3942, 4)

STEP(H, d, a, b, c, GET(8), 0x8771f681, 11)

STEP(H, c, d, a, b, GET(11), 0x6d9d6122, 16)

STEP(H, b, c, d, a, GET(14), 0xfde5380c, 23)

STEP(H, a, b, c, d, GET(1), 0xa4beea44, 4)

STEP(H, d, a, b, c, GET(4), 0x4bdecfa9, 11)

STEP(H, c, d, a, b, GET(7), 0xf6bb4b60, 16)

STEP(H, b, c, d, a, GET(10), 0xbebfbc70, 23)

STEP(H, a, b, c, d, GET(13), 0x289b7ec6, 4)

STEP(H, d, a, b, c, GET(0), 0xeaa127fa, 11)

STEP(H, c, d, a, b, GET(3), 0xd4ef3085, 16)

STEP(H, b, c, d, a, GET(6), 0x04881d05, 23)

STEP(H, a, b, c, d, GET(9), 0xd9d4d039, 4)

STEP(H, d, a, b, c, GET(12), 0xe6db99e5, 11)

STEP(H, c, d, a, b, GET(15), 0x1fa27cf8, 16)

STEP(H, b, c, d, a, GET(2), 0xc4ac5665, 23)

STEP(I, a, b, c, d, GET(0), 0xf4292244, 6)

STEP(I, d, a, b, c, GET(7), 0x432aff97, 10)

STEP(I, c, d, a, b, GET(14), 0xab9423a7, 15)

STEP(I, b, c, d, a, GET(5), 0xfc93a039, 21)

STEP(I, a, b, c, d, GET(12), 0x655b59c3, 6)

STEP(I, d, a, b, c, GET(3), 0x8f0ccc92, 10)

STEP(I, c, d, a, b, GET(10), 0xffeff47d, 15)

STEP(I, b, c, d, a, GET(1), 0x85845dd1, 21)

STEP(I, a, b, c, d, GET(8), 0x6fa87e4f, 6)

STEP(I, d, a, b, c, GET(15), 0xfe2ce6e0, 10)

STEP(I, c, d, a, b, GET(6), 0xa3014314, 15)

STEP(I, b, c, d, a, GET(13), 0x4e0811a1, 21)

STEP(I, a, b, c, d, GET(4), 0xf7537e82, 6)

STEP(I, d, a, b, c, GET(11), 0xbd3af235, 10)

STEP(I, c, d, a, b, GET(2), 0x2ad7d2bb, 15)

STEP(I, b, c, d, a, GET(9), 0xeb86d391, 21)

a += saved_a;

b += saved_b;

c += saved_c;

d += saved_d;

ptr += 64;

} while ((size -= 64) != 0);

ctx->a = a;

ctx->b = b;

ctx->c = c;

ctx->d = d;

return ptr;

}

void md5_init(struct md5_context *ctx)

{

ctx->a = 0x67452301;

ctx->b = 0xefcdab89;

ctx->c = 0x98badcfe;

ctx->d = 0x10325476;

ctx->lo = 0;

ctx->hi = 0;

memset(ctx->block, 0, sizeof(ctx->block));

}

void ATTR_UNSIGNED_WRAPS

md5_update(struct md5_context *ctx, const void *data, size_t size)

{

/* @UNSAFE */

uint_fast32_t saved_lo;

unsigned long used, free;

saved_lo = ctx->lo;

if ((ctx->lo = (saved_lo + size) & 0x1fffffff) < saved_lo)

ctx->hi++;

ctx->hi += size >> 29;

used = saved_lo & 0x3f;

if (used != 0) {

free = 64 - used;

if (size < free) {

memcpy(&ctx->buffer[used], data, size);

return;

}

memcpy(&ctx->buffer[used], data, free);

data = (const unsigned char *) data + free;

size -= free;

body(ctx, ctx->buffer, 64);

}

if (size >= 64) {

data = body(ctx, data, size & ~(unsigned long)0x3f);

size &= 0x3f;

}

memcpy(ctx->buffer, data, size);

}

void ATTR_UNSIGNED_WRAPS

md5_final(struct md5_context *ctx, unsigned char result[STATIC_ARRAY MD5_RESULTLEN])

{

/* @UNSAFE */

unsigned long used, free;

used = ctx->lo & 0x3f;

ctx->buffer[used++] = 0x80;

free = 64 - used;

if (free < 8) {

memset(&ctx->buffer[used], 0, free);

body(ctx, ctx->buffer, 64);

used = 0;

free = 64;

}

memset(&ctx->buffer[used], 0, free - 8);

ctx->lo <<= 3;

ctx->buffer[56] = ctx->lo;

ctx->buffer[57] = ctx->lo >> 8;

ctx->buffer[58] = ctx->lo >> 16;

ctx->buffer[59] = ctx->lo >> 24;

ctx->buffer[60] = ctx->hi;

ctx->buffer[61] = ctx->hi >> 8;

ctx->buffer[62] = ctx->hi >> 16;

ctx->buffer[63] = ctx->hi >> 24;

body(ctx, ctx->buffer, 64);

result[0] = ctx->a;

result[1] = ctx->a >> 8;

result[2] = ctx->a >> 16;

result[3] = ctx->a >> 24;

result[4] = ctx->b;

result[5] = ctx->b >> 8;

result[6] = ctx->b >> 16;

result[7] = ctx->b >> 24;

result[8] = ctx->c;

result[9] = ctx->c >> 8;

result[10] = ctx->c >> 16;

result[11] = ctx->c >> 24;

result[12] = ctx->d;

result[13] = ctx->d >> 8;

result[14] = ctx->d >> 16;

result[15] = ctx->d >> 24;

safe_memset(ctx, 0, sizeof(*ctx));

}

void md5_get_digest(const void *data, size_t size,

unsigned char result[STATIC_ARRAY MD5_RESULTLEN])

{

struct md5_context ctx;

md5_init(&ctx);

md5_update(&ctx, data, size);

md5_final(&ctx, result);

}

static void hash_method_init_md5(void *context)

{

md5_init(context);

}

static void hash_method_loop_md5(void *context, const void *data, size_t size)

{

md5_update(context, data, size);

}

static void hash_method_result_md5(void *context, unsigned char *result_r)

{

md5_final(context, result_r);

}

const struct hash_method hash_method_md5 = {

"md5",

sizeof(struct md5_context),

MD5_RESULTLEN,

hash_method_init_md5,

hash_method_loop_md5,

hash_method_result_md5

};