src/crypt/crypt_sha256.c - platform/external/musl - Git at Google

 /*
  * public domain sha256 crypt implementation
  *
  * original sha crypt design: http://people.redhat.com/drepper/SHA-crypt.txt
  * in this implementation at least 32bit int is assumed,
  * key length is limited, the $5$ prefix is mandatory, '\n' and ':' is rejected
  * in the salt and rounds= setting must contain a valid iteration count,
  * on error "*" is returned.
  */
 #include <ctype.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <stdint.h>

 /* public domain sha256 implementation based on fips180-3 */

 struct sha256 {
 	uint64_t len;    /* processed message length */
 	uint32_t h[8];   /* hash state */
 	uint8_t buf[64]; /* message block buffer */
 };

 static uint32_t ror(uint32_t n, int k) { return (n >> k) | (n << (32-k)); }
 #define Ch(x,y,z)  (z ^ (x & (y ^ z)))
 #define Maj(x,y,z) ((x & y) | (z & (x | y)))
 #define S0(x)      (ror(x,2) ^ ror(x,13) ^ ror(x,22))
 #define S1(x)      (ror(x,6) ^ ror(x,11) ^ ror(x,25))
 #define R0(x)      (ror(x,7) ^ ror(x,18) ^ (x>>3))
 #define R1(x)      (ror(x,17) ^ ror(x,19) ^ (x>>10))

 static const uint32_t K[64] = {
 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
 };

 static void processblock(struct sha256 *s, const uint8_t *buf)
 {
 	uint32_t W[64], t1, t2, a, b, c, d, e, f, g, h;
 	int i;

 	for (i = 0; i < 16; i++) {
 		W[i] = (uint32_t)buf[4*i]<<24;
 		W[i] |= (uint32_t)buf[4*i+1]<<16;
 		W[i] |= (uint32_t)buf[4*i+2]<<8;
 		W[i] |= buf[4*i+3];
 	}
 	for (; i < 64; i++)
 		W[i] = R1(W[i-2]) + W[i-7] + R0(W[i-15]) + W[i-16];
 	a = s->h[0];
 	b = s->h[1];
 	c = s->h[2];
 	d = s->h[3];
 	e = s->h[4];
 	f = s->h[5];
 	g = s->h[6];
 	h = s->h[7];
 	for (i = 0; i < 64; i++) {
 		t1 = h + S1(e) + Ch(e,f,g) + K[i] + W[i];
 		t2 = S0(a) + Maj(a,b,c);
 		h = g;
 		g = f;
 		f = e;
 		e = d + t1;
 		d = c;
 		c = b;
 		b = a;
 		a = t1 + t2;
 	}
 	s->h[0] += a;
 	s->h[1] += b;
 	s->h[2] += c;
 	s->h[3] += d;
 	s->h[4] += e;
 	s->h[5] += f;
 	s->h[6] += g;
 	s->h[7] += h;
 }

 static void pad(struct sha256 *s)
 {
 	unsigned r = s->len % 64;

 	s->buf[r++] = 0x80;
 	if (r > 56) {
 		memset(s->buf + r, 0, 64 - r);
 		r = 0;
 		processblock(s, s->buf);
 	}
 	memset(s->buf + r, 0, 56 - r);
 	s->len *= 8;
 	s->buf[56] = s->len >> 56;
 	s->buf[57] = s->len >> 48;
 	s->buf[58] = s->len >> 40;
 	s->buf[59] = s->len >> 32;
 	s->buf[60] = s->len >> 24;
 	s->buf[61] = s->len >> 16;
 	s->buf[62] = s->len >> 8;
 	s->buf[63] = s->len;
 	processblock(s, s->buf);
 }

 static void sha256_init(struct sha256 *s)
 {
 	s->len = 0;
 	s->h[0] = 0x6a09e667;
 	s->h[1] = 0xbb67ae85;
 	s->h[2] = 0x3c6ef372;
 	s->h[3] = 0xa54ff53a;
 	s->h[4] = 0x510e527f;
 	s->h[5] = 0x9b05688c;
 	s->h[6] = 0x1f83d9ab;
 	s->h[7] = 0x5be0cd19;
 }

 static void sha256_sum(struct sha256 *s, uint8_t *md)
 {
 	int i;

 	pad(s);
 	for (i = 0; i < 8; i++) {
 		md[4*i] = s->h[i] >> 24;
 		md[4*i+1] = s->h[i] >> 16;
 		md[4*i+2] = s->h[i] >> 8;
 		md[4*i+3] = s->h[i];
 	}
 }

 static void sha256_update(struct sha256 *s, const void *m, unsigned long len)
 {
 	const uint8_t *p = m;
 	unsigned r = s->len % 64;

 	s->len += len;
 	if (r) {
 		if (len < 64 - r) {
 			memcpy(s->buf + r, p, len);
 			return;
 		}
 		memcpy(s->buf + r, p, 64 - r);
 		len -= 64 - r;
 		p += 64 - r;
 		processblock(s, s->buf);
 	}
 	for (; len >= 64; len -= 64, p += 64)
 		processblock(s, p);
 	memcpy(s->buf, p, len);
 }

 static const unsigned char b64[] =
 "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

 static char *to64(char *s, unsigned int u, int n)
 {
 	while (--n >= 0) {
 		*s++ = b64[u % 64];
 		u /= 64;
 	}
 	return s;
 }

 /* key limit is not part of the original design, added for DoS protection.
  * rounds limit has been lowered (versus the reference/spec), also for DoS
  * protection. runtime is O(klen^2 + klen*rounds) */
 #define KEY_MAX 256
 #define SALT_MAX 16
 #define ROUNDS_DEFAULT 5000
 #define ROUNDS_MIN 1000
 #define ROUNDS_MAX 9999999

 /* hash n bytes of the repeated md message digest */
 static void hashmd(struct sha256 *s, unsigned int n, const void *md)
 {
 	unsigned int i;

 	for (i = n; i > 32; i -= 32)
 		sha256_update(s, md, 32);
 	sha256_update(s, md, i);
 }

 static char *sha256crypt(const char *key, const char *setting, char *output)
 {
 	struct sha256 ctx;
 	unsigned char md[32], kmd[32], smd[32];
 	unsigned int i, r, klen, slen;
 	char rounds[20] = "";
 	const char *salt;
 	char *p;

 	/* reject large keys */
 	klen = strnlen(key, KEY_MAX+1);
 	if (klen > KEY_MAX)
 		return 0;

 	/* setting: $5$rounds=n$salt$ (rounds=n$ and closing $ are optional) */
 	if (strncmp(setting, "$5$", 3) != 0)
 		return 0;
 	salt = setting + 3;

 	r = ROUNDS_DEFAULT;
 	if (strncmp(salt, "rounds=", sizeof "rounds=" - 1) == 0) {
 		unsigned long u;
 		char *end;

 		/*
 		 * this is a deviation from the reference:
 		 * bad rounds setting is rejected if it is
 		 * - empty
 		 * - unterminated (missing '$')
 		 * - begins with anything but a decimal digit
 		 * the reference implementation treats these bad
 		 * rounds as part of the salt or parse them with
 		 * strtoul semantics which may cause problems
 		 * including non-portable hashes that depend on
 		 * the host's value of ULONG_MAX.
 		 */
 		salt += sizeof "rounds=" - 1;
 		if (!isdigit(*salt))
 			return 0;
 		u = strtoul(salt, &end, 10);
 		if (*end != '$')
 			return 0;
 		salt = end+1;
 		if (u < ROUNDS_MIN)
 			r = ROUNDS_MIN;
 		else if (u > ROUNDS_MAX)
 			return 0;
 		else
 			r = u;
 		/* needed when rounds is zero prefixed or out of bounds */
 		sprintf(rounds, "rounds=%u$", r);
 	}

 	for (i = 0; i < SALT_MAX && salt[i] && salt[i] != '$'; i++)
 		/* reject characters that interfere with /etc/shadow parsing */
 		if (salt[i] == '\n' || salt[i] == ':')
 			return 0;
 	slen = i;

 	/* B = sha(key salt key) */
 	sha256_init(&ctx);
 	sha256_update(&ctx, key, klen);
 	sha256_update(&ctx, salt, slen);
 	sha256_update(&ctx, key, klen);
 	sha256_sum(&ctx, md);

 	/* A = sha(key salt repeat-B alternate-B-key) */
 	sha256_init(&ctx);
 	sha256_update(&ctx, key, klen);
 	sha256_update(&ctx, salt, slen);
 	hashmd(&ctx, klen, md);
 	for (i = klen; i > 0; i >>= 1)
 		if (i & 1)
 			sha256_update(&ctx, md, sizeof md);
 		else
 			sha256_update(&ctx, key, klen);
 	sha256_sum(&ctx, md);

 	/* DP = sha(repeat-key), this step takes O(klen^2) time */
 	sha256_init(&ctx);
 	for (i = 0; i < klen; i++)
 		sha256_update(&ctx, key, klen);
 	sha256_sum(&ctx, kmd);

 	/* DS = sha(repeat-salt) */
 	sha256_init(&ctx);
 	for (i = 0; i < 16 + md[0]; i++)
 		sha256_update(&ctx, salt, slen);
 	sha256_sum(&ctx, smd);

 	/* iterate A = f(A,DP,DS), this step takes O(rounds*klen) time */
 	for (i = 0; i < r; i++) {
 		sha256_init(&ctx);
 		if (i % 2)
 			hashmd(&ctx, klen, kmd);
 		else
 			sha256_update(&ctx, md, sizeof md);
 		if (i % 3)
 			sha256_update(&ctx, smd, slen);
 		if (i % 7)
 			hashmd(&ctx, klen, kmd);
 		if (i % 2)
 			sha256_update(&ctx, md, sizeof md);
 		else
 			hashmd(&ctx, klen, kmd);
 		sha256_sum(&ctx, md);
 	}

 	/* output is $5$rounds=n$salt$hash */
 	p = output;
 	p += sprintf(p, "$5$%s%.*s$", rounds, slen, salt);
 	static const unsigned char perm[][3] = {
 		0,10,20,21,1,11,12,22,2,3,13,23,24,4,14,
 		15,25,5,6,16,26,27,7,17,18,28,8,9,19,29 };
 	for (i=0; i<10; i++) p = to64(p,
 		(md[perm[i][0]]<<16)|(md[perm[i][1]]<<8)|md[perm[i][2]], 4);
 	p = to64(p, (md[31]<<8)|md[30], 3);
 	*p = 0;
 	return output;
 }

 char *__crypt_sha256(const char *key, const char *setting, char *output)
 {
 	static const char testkey[] = "Xy01@#\x01\x02\x80\x7f\xff\r\n\x81\t !";
 	static const char testsetting[] = "$5$rounds=1234$abc0123456789$";
 	static const char testhash[] = "$5$rounds=1234$abc0123456789$3VfDjPt05VHFn47C/ojFZ6KRPYrOjj1lLbH.dkF3bZ6";
 	char testbuf[128];
 	char *p, *q;

 	p = sha256crypt(key, setting, output);
 	/* self test and stack cleanup */
 	q = sha256crypt(testkey, testsetting, testbuf);
 	if (!p || q != testbuf || memcmp(testbuf, testhash, sizeof testhash))
 		return "*";
 	return p;
 }
	/*
	* public domain sha256 crypt implementation
	*
	* original sha crypt design: http://people.redhat.com/drepper/SHA-crypt.txt
	* in this implementation at least 32bit int is assumed,
	* key length is limited, the $5$ prefix is mandatory, '\n' and ':' is rejected
	* in the salt and rounds= setting must contain a valid iteration count,
	* on error "*" is returned.
	*/
	#include <ctype.h>
	#include <stdlib.h>
	#include <stdio.h>
	#include <string.h>
	#include <stdint.h>

	/* public domain sha256 implementation based on fips180-3 */

	struct sha256 {
	uint64_t len; /* processed message length */
	uint32_t h[8]; /* hash state */
	uint8_t buf[64]; /* message block buffer */
	};

	static uint32_t ror(uint32_t n, int k) { return (n >> k) \| (n << (32-k)); }
	#define Ch(x,y,z) (z ^ (x & (y ^ z)))
	#define Maj(x,y,z) ((x & y) \| (z & (x \| y)))
	#define S0(x) (ror(x,2) ^ ror(x,13) ^ ror(x,22))
	#define S1(x) (ror(x,6) ^ ror(x,11) ^ ror(x,25))
	#define R0(x) (ror(x,7) ^ ror(x,18) ^ (x>>3))
	#define R1(x) (ror(x,17) ^ ror(x,19) ^ (x>>10))

	static const uint32_t K[64] = {
	0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
	0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
	0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
	0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
	0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
	0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
	0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
	0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
	};

	static void processblock(struct sha256 s, const uint8_t buf)
	{
	uint32_t W[64], t1, t2, a, b, c, d, e, f, g, h;
	int i;

	for (i = 0; i < 16; i++) {
	W[i] = (uint32_t)buf[4*i]<<24;
	W[i] \|= (uint32_t)buf[4*i+1]<<16;
	W[i] \|= (uint32_t)buf[4*i+2]<<8;
	W[i] \|= buf[4*i+3];
	}
	for (; i < 64; i++)
	W[i] = R1(W[i-2]) + W[i-7] + R0(W[i-15]) + W[i-16];
	a = s->h[0];
	b = s->h[1];
	c = s->h[2];
	d = s->h[3];
	e = s->h[4];
	f = s->h[5];
	g = s->h[6];
	h = s->h[7];
	for (i = 0; i < 64; i++) {
	t1 = h + S1(e) + Ch(e,f,g) + K[i] + W[i];
	t2 = S0(a) + Maj(a,b,c);
	h = g;
	g = f;
	f = e;
	e = d + t1;
	d = c;
	c = b;
	b = a;
	a = t1 + t2;
	}
	s->h[0] += a;
	s->h[1] += b;
	s->h[2] += c;
	s->h[3] += d;
	s->h[4] += e;
	s->h[5] += f;
	s->h[6] += g;
	s->h[7] += h;
	}

	static void pad(struct sha256 *s)
	{
	unsigned r = s->len % 64;

	s->buf[r++] = 0x80;
	if (r > 56) {
	memset(s->buf + r, 0, 64 - r);
	r = 0;
	processblock(s, s->buf);
	}
	memset(s->buf + r, 0, 56 - r);
	s->len *= 8;
	s->buf[56] = s->len >> 56;
	s->buf[57] = s->len >> 48;
	s->buf[58] = s->len >> 40;
	s->buf[59] = s->len >> 32;
	s->buf[60] = s->len >> 24;
	s->buf[61] = s->len >> 16;
	s->buf[62] = s->len >> 8;
	s->buf[63] = s->len;
	processblock(s, s->buf);
	}

	static void sha256_init(struct sha256 *s)
	{
	s->len = 0;
	s->h[0] = 0x6a09e667;
	s->h[1] = 0xbb67ae85;
	s->h[2] = 0x3c6ef372;
	s->h[3] = 0xa54ff53a;
	s->h[4] = 0x510e527f;
	s->h[5] = 0x9b05688c;
	s->h[6] = 0x1f83d9ab;
	s->h[7] = 0x5be0cd19;
	}

	static void sha256_sum(struct sha256 s, uint8_t md)
	{
	int i;

	pad(s);
	for (i = 0; i < 8; i++) {
	md[4*i] = s->h[i] >> 24;
	md[4*i+1] = s->h[i] >> 16;
	md[4*i+2] = s->h[i] >> 8;
	md[4*i+3] = s->h[i];
	}
	}

	static void sha256_update(struct sha256 s, const void m, unsigned long len)
	{
	const uint8_t *p = m;
	unsigned r = s->len % 64;

	s->len += len;
	if (r) {
	if (len < 64 - r) {
	memcpy(s->buf + r, p, len);
	return;
	}
	memcpy(s->buf + r, p, 64 - r);
	len -= 64 - r;
	p += 64 - r;
	processblock(s, s->buf);
	}
	for (; len >= 64; len -= 64, p += 64)
	processblock(s, p);
	memcpy(s->buf, p, len);
	}

	static const unsigned char b64[] =
	"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

	static char to64(char s, unsigned int u, int n)
	{
	while (--n >= 0) {
	*s++ = b64[u % 64];
	u /= 64;
	}
	return s;
	}

	/* key limit is not part of the original design, added for DoS protection.
	* rounds limit has been lowered (versus the reference/spec), also for DoS
	* protection. runtime is O(klen^2 + klenrounds) /
	#define KEY_MAX 256
	#define SALT_MAX 16
	#define ROUNDS_DEFAULT 5000
	#define ROUNDS_MIN 1000
	#define ROUNDS_MAX 9999999

	/* hash n bytes of the repeated md message digest */
	static void hashmd(struct sha256 s, unsigned int n, const void md)
	{
	unsigned int i;

	for (i = n; i > 32; i -= 32)
	sha256_update(s, md, 32);
	sha256_update(s, md, i);
	}

	static char sha256crypt(const char key, const char setting, char output)
	{
	struct sha256 ctx;
	unsigned char md[32], kmd[32], smd[32];
	unsigned int i, r, klen, slen;
	char rounds[20] = "";
	const char *salt;
	char *p;

	/* reject large keys */
	klen = strnlen(key, KEY_MAX+1);
	if (klen > KEY_MAX)
	return 0;

	/* setting: $5$rounds=n$salt$ (rounds=n$ and closing $ are optional) */
	if (strncmp(setting, "$5$", 3) != 0)
	return 0;
	salt = setting + 3;

	r = ROUNDS_DEFAULT;
	if (strncmp(salt, "rounds=", sizeof "rounds=" - 1) == 0) {
	unsigned long u;
	char *end;

	/*
	* this is a deviation from the reference:
	* bad rounds setting is rejected if it is
	* - empty
	* - unterminated (missing '$')
	* - begins with anything but a decimal digit
	* the reference implementation treats these bad
	* rounds as part of the salt or parse them with
	* strtoul semantics which may cause problems
	* including non-portable hashes that depend on
	* the host's value of ULONG_MAX.
	*/
	salt += sizeof "rounds=" - 1;
	if (!isdigit(*salt))
	return 0;
	u = strtoul(salt, &end, 10);
	if (*end != '$')
	return 0;
	salt = end+1;
	if (u < ROUNDS_MIN)
	r = ROUNDS_MIN;
	else if (u > ROUNDS_MAX)
	return 0;
	else
	r = u;
	/* needed when rounds is zero prefixed or out of bounds */
	sprintf(rounds, "rounds=%u$", r);
	}

	for (i = 0; i < SALT_MAX && salt[i] && salt[i] != '$'; i++)
	/* reject characters that interfere with /etc/shadow parsing */
	if (salt[i] == '\n' \|\| salt[i] == ':')
	return 0;
	slen = i;

	/* B = sha(key salt key) */
	sha256_init(&ctx);
	sha256_update(&ctx, key, klen);
	sha256_update(&ctx, salt, slen);
	sha256_update(&ctx, key, klen);
	sha256_sum(&ctx, md);

	/* A = sha(key salt repeat-B alternate-B-key) */
	sha256_init(&ctx);
	sha256_update(&ctx, key, klen);
	sha256_update(&ctx, salt, slen);
	hashmd(&ctx, klen, md);
	for (i = klen; i > 0; i >>= 1)
	if (i & 1)
	sha256_update(&ctx, md, sizeof md);
	else
	sha256_update(&ctx, key, klen);
	sha256_sum(&ctx, md);

	/* DP = sha(repeat-key), this step takes O(klen^2) time */
	sha256_init(&ctx);
	for (i = 0; i < klen; i++)
	sha256_update(&ctx, key, klen);
	sha256_sum(&ctx, kmd);

	/* DS = sha(repeat-salt) */
	sha256_init(&ctx);
	for (i = 0; i < 16 + md[0]; i++)
	sha256_update(&ctx, salt, slen);
	sha256_sum(&ctx, smd);

	/* iterate A = f(A,DP,DS), this step takes O(roundsklen) time /
	for (i = 0; i < r; i++) {
	sha256_init(&ctx);
	if (i % 2)
	hashmd(&ctx, klen, kmd);
	else
	sha256_update(&ctx, md, sizeof md);
	if (i % 3)
	sha256_update(&ctx, smd, slen);
	if (i % 7)
	hashmd(&ctx, klen, kmd);
	if (i % 2)
	sha256_update(&ctx, md, sizeof md);
	else
	hashmd(&ctx, klen, kmd);
	sha256_sum(&ctx, md);
	}

	/* output is $5$rounds=n$salt$hash */
	p = output;
	p += sprintf(p, "$5$%s%.*s$", rounds, slen, salt);
	static const unsigned char perm[][3] = {
	0,10,20,21,1,11,12,22,2,3,13,23,24,4,14,
	15,25,5,6,16,26,27,7,17,18,28,8,9,19,29 };
	for (i=0; i<10; i++) p = to64(p,
	(md[perm[i][0]]<<16)\|(md[perm[i][1]]<<8)\|md[perm[i][2]], 4);
	p = to64(p, (md[31]<<8)\|md[30], 3);
	*p = 0;
	return output;
	}

	char __crypt_sha256(const char key, const char setting, char output)
	{
	static const char testkey[] = "Xy01@#\x01\x02\x80\x7f\xff\r\n\x81\t !";
	static const char testsetting[] = "$5$rounds=1234$abc0123456789$";
	static const char testhash[] = "$5$rounds=1234$abc0123456789$3VfDjPt05VHFn47C/ojFZ6KRPYrOjj1lLbH.dkF3bZ6";
	char testbuf[128];
	char p, q;

	p = sha256crypt(key, setting, output);
	/* self test and stack cleanup */
	q = sha256crypt(testkey, testsetting, testbuf);
	if (!p \|\| q != testbuf \|\| memcmp(testbuf, testhash, sizeof testhash))
	return "*";
	return p;
	}