#pragma prototyped

#define sha1_description "FIPS 180-1 SHA-1 secure hash algorithm 1."

#define sha1_options "[+(version)?sha1 (FIPS 180-1) 1996-09-26]\

#define sha1_match "sha1|SHA1|sha-1|SHA-1"

#define sha1_scale 0

#define sha1_padding md5_pad

typedef struct Sha1_s

{

_SUM_PUBLIC_

_SUM_PRIVATE_

uint32_t count[2];

uint32_t state[5];

uint8_t buffer[64];

uint8_t digest[20];

uint8_t digest_sum[20];

} Sha1_t;

#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))

#if _ast_intswap

# define blk0(i) \

(block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) \

| (rol(block->l[i], 8) & 0x00FF00FF))

#else

# define blk0(i) block->l[i]

#endif

#define blk(i) \

(block->l[i & 15] = rol(block->l[(i + 13) & 15] \

^ block->l[(i + 8) & 15] \

^ block->l[(i + 2) & 15] \

^ block->l[i & 15], 1))

#define R0(v,w,x,y,z,i) \

z += ((w & (x ^ y)) ^ y) + blk0(i) + 0x5A827999 + rol(v, 5); \

w = rol(w, 30);

#define R1(v,w,x,y,z,i) \

z += ((w & (x ^ y)) ^ y) + blk(i) + 0x5A827999 + rol(v, 5); \

w = rol(w, 30);

#define R2(v,w,x,y,z,i) \

z += (w ^ x ^ y) + blk(i) + 0x6ED9EBA1 + rol(v, 5); \

w = rol(w, 30);

#define R3(v,w,x,y,z,i) \

z += (((w | x) & y) | (w & x)) + blk(i) + 0x8F1BBCDC + rol(v, 5); \

w = rol(w, 30);

#define R4(v,w,x,y,z,i) \

z += (w ^ x ^ y) + blk(i) + 0xCA62C1D6 + rol(v, 5); \

w = rol(w, 30);

typedef union {

unsigned char c[64];

unsigned int l[16];

} CHAR64LONG16;

#ifdef __sparc_v9__

static void do_R01(uint32_t *a, uint32_t *b, uint32_t *c,

uint32_t *d, uint32_t *e, CHAR64LONG16 *);

static void do_R2(uint32_t *a, uint32_t *b, uint32_t *c,

uint32_t *d, uint32_t *e, CHAR64LONG16 *);

static void do_R3(uint32_t *a, uint32_t *b, uint32_t *c,

uint32_t *d, uint32_t *e, CHAR64LONG16 *);

static void do_R4(uint32_t *a, uint32_t *b, uint32_t *c,

uint32_t *d, uint32_t *e, CHAR64LONG16 *);

#define nR0(v,w,x,y,z,i) R0(*v,*w,*x,*y,*z,i)

#define nR1(v,w,x,y,z,i) R1(*v,*w,*x,*y,*z,i)

#define nR2(v,w,x,y,z,i) R2(*v,*w,*x,*y,*z,i)

#define nR3(v,w,x,y,z,i) R3(*v,*w,*x,*y,*z,i)

#define nR4(v,w,x,y,z,i) R4(*v,*w,*x,*y,*z,i)

static void

do_R01(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d,

uint32_t *e, CHAR64LONG16 *block)

{

nR0(a,b,c,d,e, 0); nR0(e,a,b,c,d, 1); nR0(d,e,a,b,c, 2);

nR0(c,d,e,a,b, 3); nR0(b,c,d,e,a, 4); nR0(a,b,c,d,e, 5);

nR0(e,a,b,c,d, 6); nR0(d,e,a,b,c, 7); nR0(c,d,e,a,b, 8);

nR0(b,c,d,e,a, 9); nR0(a,b,c,d,e,10); nR0(e,a,b,c,d,11);

nR0(d,e,a,b,c,12); nR0(c,d,e,a,b,13); nR0(b,c,d,e,a,14);

nR0(a,b,c,d,e,15); nR1(e,a,b,c,d,16); nR1(d,e,a,b,c,17);

nR1(c,d,e,a,b,18); nR1(b,c,d,e,a,19);

}

static void

do_R2(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d,

uint32_t *e, CHAR64LONG16 *block)

{

nR2(a,b,c,d,e,20); nR2(e,a,b,c,d,21); nR2(d,e,a,b,c,22);

nR2(c,d,e,a,b,23); nR2(b,c,d,e,a,24); nR2(a,b,c,d,e,25);

nR2(e,a,b,c,d,26); nR2(d,e,a,b,c,27); nR2(c,d,e,a,b,28);

nR2(b,c,d,e,a,29); nR2(a,b,c,d,e,30); nR2(e,a,b,c,d,31);

nR2(d,e,a,b,c,32); nR2(c,d,e,a,b,33); nR2(b,c,d,e,a,34);

nR2(a,b,c,d,e,35); nR2(e,a,b,c,d,36); nR2(d,e,a,b,c,37);

nR2(c,d,e,a,b,38); nR2(b,c,d,e,a,39);

}

static void

do_R3(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d,

uint32_t *e, CHAR64LONG16 *block)

{

nR3(a,b,c,d,e,40); nR3(e,a,b,c,d,41); nR3(d,e,a,b,c,42);

nR3(c,d,e,a,b,43); nR3(b,c,d,e,a,44); nR3(a,b,c,d,e,45);

nR3(e,a,b,c,d,46); nR3(d,e,a,b,c,47); nR3(c,d,e,a,b,48);

nR3(b,c,d,e,a,49); nR3(a,b,c,d,e,50); nR3(e,a,b,c,d,51);

nR3(d,e,a,b,c,52); nR3(c,d,e,a,b,53); nR3(b,c,d,e,a,54);

nR3(a,b,c,d,e,55); nR3(e,a,b,c,d,56); nR3(d,e,a,b,c,57);

nR3(c,d,e,a,b,58); nR3(b,c,d,e,a,59);

}

static void

do_R4(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d,

uint32_t *e, CHAR64LONG16 *block)

{

nR4(a,b,c,d,e,60); nR4(e,a,b,c,d,61); nR4(d,e,a,b,c,62);

nR4(c,d,e,a,b,63); nR4(b,c,d,e,a,64); nR4(a,b,c,d,e,65);

nR4(e,a,b,c,d,66); nR4(d,e,a,b,c,67); nR4(c,d,e,a,b,68);

nR4(b,c,d,e,a,69); nR4(a,b,c,d,e,70); nR4(e,a,b,c,d,71);

nR4(d,e,a,b,c,72); nR4(c,d,e,a,b,73); nR4(b,c,d,e,a,74);

nR4(a,b,c,d,e,75); nR4(e,a,b,c,d,76); nR4(d,e,a,b,c,77);

nR4(c,d,e,a,b,78); nR4(b,c,d,e,a,79);

}

#endif

static void

sha1_transform(uint32_t state[5], const unsigned char buffer[64]) {

uint32_t a, b, c, d, e;

CHAR64LONG16 *block;

CHAR64LONG16 workspace;

block = &workspace;

(void)memcpy(block, buffer, 64);

/* Copy sha->state[] to working vars */

a = state[0];

b = state[1];

c = state[2];

d = state[3];

e = state[4];

#ifdef __sparc_v9__

do_R01(&a, &b, &c, &d, &e, block);

do_R2(&a, &b, &c, &d, &e, block);

do_R3(&a, &b, &c, &d, &e, block);

do_R4(&a, &b, &c, &d, &e, block);

#else

/* 4 rounds of 20 operations each. Loop unrolled. */

R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);

R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);

R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);

R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);

R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);

R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);

R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);

R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);

R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);

R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);

R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);

R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);

R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);

R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);

R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);

R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);

R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);

R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);

R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);

R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);

#endif

/* Add the working vars back into context.state[] */

state[0] += a;

state[1] += b;

state[2] += c;

state[3] += d;

state[4] += e;

/* Wipe variables */

a = b = c = d = e = 0;

}

static int

sha1_block(register Sum_t* p, const void* s, size_t len)

{

Sha1_t* sha = (Sha1_t*)p;

uint8_t* data = (uint8_t*)s;

unsigned int i, j;

if (len) {

j = sha->count[0];

if ((sha->count[0] += len << 3) < j)

sha->count[1] += (len >> 29) + 1;

j = (j >> 3) & 63;

if ((j + len) > 63) {

(void)memcpy(&sha->buffer[j], data, (i = 64 - j));

sha1_transform(sha->state, sha->buffer);

for ( ; i + 63 < len; i += 64)

sha1_transform(sha->state, &data[i]);

j = 0;

} else {

i = 0;

}

(void)memcpy(&sha->buffer[j], &data[i], len - i);

}

return 0;

}

static int

sha1_init(Sum_t* p)

{

register Sha1_t* sha = (Sha1_t*)p;

sha->count[0] = sha->count[1] = 0;

sha->state[0] = 0x67452301;

sha->state[1] = 0xEFCDAB89;

sha->state[2] = 0x98BADCFE;

sha->state[3] = 0x10325476;

sha->state[4] = 0xC3D2E1F0;

return 0;

}

static Sum_t*

sha1_open(const Method_t* method, const char* name)

{

Sha1_t* sha;

if (sha = newof(0, Sha1_t, 1, 0))

{

sha->method = (Method_t*)method;

sha->name = name;

sha1_init((Sum_t*)sha);

}

return (Sum_t*)sha;

}

static const unsigned char final_200 = 128;

static const unsigned char final_0 = 0;

static int

sha1_done(Sum_t* p)

{

Sha1_t* sha = (Sha1_t*)p;

unsigned int i;

unsigned char finalcount[8];

for (i = 0; i < 8; i++) {

/* Endian independent */

finalcount[i] = (unsigned char)

((sha->count[(i >= 4 ? 0 : 1)]

>> ((3 - (i & 3)) * 8)) & 255);

}

sha1_block(p, &final_200, 1);

while ((sha->count[0] & 504) != 448)

sha1_block(p, &final_0, 1);

/* The next Update should cause a sha1_transform() */

sha1_block(p, finalcount, 8);

for (i = 0; i < elementsof(sha->digest); i++)

{

sha->digest[i] = (unsigned char)((sha->state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255);

sha->digest_sum[i] ^= sha->digest[i];

}

memset(sha->count, 0, sizeof(sha->count));

memset(sha->state, 0, sizeof(sha->state));

memset(sha->buffer, 0, sizeof(sha->buffer));

return 0;

}

static int

sha1_print(Sum_t* p, Sfio_t* sp, register int flags, size_t scale)

{

register Sha1_t* sha = (Sha1_t*)p;

register unsigned char* d;

register int n;

d = (flags & SUM_TOTAL) ? sha->digest_sum : sha->digest;

for (n = 0; n < elementsof(sha->digest); n++)

sfprintf(sp, "%02x", d[n]);

return 0;

}

static int

sha1_data(Sum_t* p, Sumdata_t* data)

{

register Sha1_t* sha = (Sha1_t*)p;

data->size = elementsof(sha->digest);

data->num = 0;

data->buf = sha->digest;

return 0;

}