basic executor support - ported from suhosin 0.9.39

1 files changed, 385 insertions, 0 deletions

diff --git a/execute_rnd.inc.c b/execute_rnd.inc.c
new file mode 100644
index 0000000..c09c467
--- /dev/null
+++ b/execute_rnd.inc.c
@@ -0,0 +1,385 @@
+/* MT RAND FUNCTIONS */
+
+/*
+        The following php_mt_...() functions are based on a C++ class MTRand by
+        Richard J. Wagner. For more information see the web page at
+        http://www-personal.engin.umich.edu/~wagnerr/MersenneTwister.html
+
+        Mersenne Twister random number generator -- a C++ class MTRand
+        Based on code by Makoto Matsumoto, Takuji Nishimura, and Shawn Cokus
+        Richard J. Wagner  v1.0  15 May 2003  rjwagner@writeme.com
+
+        The Mersenne Twister is an algorithm for generating random numbers.  It
+        was designed with consideration of the flaws in various other generators.
+        The period, 2^19937-1, and the order of equidistribution, 623 dimensions,
+        are far greater.  The generator is also fast; it avoids multiplication and
+        division, and it benefits from caches and pipelines.  For more information
+        see the inventors' web page at http://www.math.keio.ac.jp/~matumoto/emt.html
+
+        Reference
+        M. Matsumoto and T. Nishimura, "Mersenne Twister: A 623-Dimensionally
+        Equidistributed Uniform Pseudo-Random Number Generator", ACM Transactions on
+        Modeling and Computer Simulation, Vol. 8, No. 1, January 1998, pp 3-30.
+
+        Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,
+        Copyright (C) 2000 - 2003, Richard J. Wagner
+        All rights reserved.                          
+
+        Redistribution and use in source and binary forms, with or without
+        modification, are permitted provided that the following conditions
+        are met:
+
+        1. Redistributions of source code must retain the above copyright
+           notice, this list of conditions and the following disclaimer.
+
+        2. Redistributions in binary form must reproduce the above copyright
+           notice, this list of conditions and the following disclaimer in the
+           documentation and/or other materials provided with the distribution.
+
+        3. The names of its contributors may not be used to endorse or promote 
+           products derived from this software without specific prior written 
+           permission.
+
+        THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+        "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+        LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+        A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+        CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+        EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+        PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+        PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+        LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+        NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+        SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+        The original code included the following notice:
+
+        When you use this, send an email to: matumoto@math.keio.ac.jp
+    with an appropriate reference to your work.
+
+        It would be nice to CC: rjwagner@writeme.com and Cokus@math.washington.edu
+        when you write.
+*/
+
+#define N             624                 /* length of state vector */
+#define M             (397)                /* a period parameter */
+#define hiBit(u)      ((u) & 0x80000000U)  /* mask all but highest   bit of u */
+#define loBit(u)      ((u) & 0x00000001U)  /* mask all but lowest    bit of u */
+#define loBits(u)     ((u) & 0x7FFFFFFFU)  /* mask     the highest   bit of u */
+#define mixBits(u, v) (hiBit(u)|loBits(v)) /* move hi bit of u to hi bit of v */
+
+#define twist(m,u,v)  (m ^ (mixBits(u,v)>>1) ^ ((php_uint32)(-(php_int32)(loBit(v))) & 0x9908b0dfU))
+
+/* {{{ php_mt_initialize
+ */
+static inline void suhosin_mt_initialize(php_uint32 seed, php_uint32 *state)
+{
+        /* Initialize generator state with seed
+           See Knuth TAOCP Vol 2, 3rd Ed, p.106 for multiplier.
+           In previous versions, most significant bits (MSBs) of the seed affect
+           only MSBs of the state array.  Modified 9 Jan 2002 by Makoto Matsumoto. */
+
+        register php_uint32 *s = state;
+        register php_uint32 *r = state;
+        register int i = 1;
+
+        *s++ = seed & 0xffffffffU;
+        for( ; i < N; ++i ) {
+                *s++ = ( 1812433253U * ( *r ^ (*r >> 30) ) + i ) & 0xffffffffU;
+                r++;
+        }
+}
+/* }}} */
+
+static inline void suhosin_mt_init_by_array(php_uint32 *key, int keylen, php_uint32 *state)
+{
+    int i, j, k;
+    suhosin_mt_initialize(19650218U, state);
+    i = 1; j = 0;
+    k = (N > keylen ? N : keylen);
+    for (; k; k--) {
+        state[i] = (state[i] ^ ((state[i-1] ^ (state[i-1] >> 30)) * 1664525U)) + key[j] + j;
+        i++; j = (j+1) % keylen;
+        if (i >= N) { state[0] = state[N-1]; i=1; }
+    }
+    for (k=N-1; k; k--) {
+        state[i] = (state[i] ^ ((state[i-1] ^ (state[i-1] >> 30)) * 1566083941U)) - i;
+        i++;
+        if (i >= N) { state[0] = state[N-1]; i=1; }
+    }
+    state[0] = 0x80000000U;
+}
+/* }}} */
+
+
+/* {{{ suhosin_mt_reload
+ */
+static inline void suhosin_mt_reload(php_uint32 *state, php_uint32 **next, int *left)
+{
+        /* Generate N new values in state
+           Made clearer and faster by Matthew Bellew (matthew.bellew@home.com) */
+
+        register php_uint32 *p = state;
+        register int i;
+
+        for (i = N - M; i--; ++p)
+                *p = twist(p[M], p[0], p[1]);
+        for (i = M; --i; ++p)
+                *p = twist(p[M-N], p[0], p[1]);
+        *p = twist(p[M-N], p[0], state[0]);
+        *left = N;
+        *next = state;
+}
+/* }}} */
+
+/* {{{ suhosin_mt_srand
+ */
+static void suhosin_mt_srand(php_uint32 seed TSRMLS_DC)
+{
+        /* Seed the generator with a simple uint32 */
+        suhosin_mt_initialize(seed, SUHOSIN7_G(mt_state));
+        suhosin_mt_reload(SUHOSIN7_G(mt_state), &SUHOSIN7_G(mt_next), &SUHOSIN7_G(mt_left));
+
+        /* Seed only once */
+        SUHOSIN7_G(mt_is_seeded) = 1;
+}
+/* }}} */
+
+/* {{{ suhosin_mt_rand
+ */
+static php_uint32 suhosin_mt_rand(TSRMLS_D)
+{
+        /* Pull a 32-bit integer from the generator state
+           Every other access function simply transforms the numbers extracted here */
+        
+        register php_uint32 s1;
+
+        if (SUHOSIN7_G(mt_left) == 0) {
+                suhosin_mt_reload(SUHOSIN7_G(mt_state), &SUHOSIN7_G(mt_next), &SUHOSIN7_G(mt_left));
+        }
+        --SUHOSIN7_G(mt_left);
+                
+        s1 = *SUHOSIN7_G(mt_next)++;
+        s1 ^= (s1 >> 11);
+        s1 ^= (s1 <<  7) & 0x9d2c5680U;
+        s1 ^= (s1 << 15) & 0xefc60000U;
+        return ( s1 ^ (s1 >> 18) );
+}
+/* }}} */
+
+/* {{{ SUHOSIN7_Gen_entropy
+ */
+static void SUHOSIN7_Gen_entropy(php_uint32 *entropybuf TSRMLS_DC)
+{
+    php_uint32 seedbuf[20];
+    /* On a modern OS code, stack and heap base are randomized */
+    unsigned long code_value  = (unsigned long)SUHOSIN7_Gen_entropy;
+    unsigned long stack_value = (unsigned long)&code_value;
+    unsigned long heap_value  = (unsigned long)SUHOSIN7_G(r_state);
+    suhosin_SHA256_CTX   context;
+    int fd;
+    
+    code_value ^= code_value >> 32;
+    stack_value ^= stack_value >> 32;
+    heap_value ^= heap_value >> 32;
+    
+    seedbuf[0] = code_value;
+    seedbuf[1] = stack_value;
+    seedbuf[2] = heap_value;
+    seedbuf[3] = time(0);
+#ifdef PHP_WIN32
+    seedbuf[4] = GetCurrentProcessId();
+#else
+    seedbuf[4] = getpid();
+#endif
+    seedbuf[5] = (php_uint32) 0x7fffffff * php_combined_lcg(TSRMLS_C);
+
+#ifndef PHP_WIN32
+    fd = VCWD_OPEN("/dev/urandom", O_RDONLY);
+    if (fd >= 0) {
+        /* ignore error case - if urandom doesn't give us any/enough random bytes */
+        read(fd, &seedbuf[6], 8 * sizeof(php_uint32));
+        close(fd);
+    }
+#else
+    /* we have to live with the possibility that this call fails */
+    php_win32_get_random_bytes((unsigned char*)&seedbuf[6], 8 * sizeof(php_uint32));
+#endif
+
+    suhosin_SHA256Init(&context);
+    /* to our friends from Debian: yes this will add unitialized stack values to the entropy DO NOT REMOVE */
+    suhosin_SHA256Update(&context, (void *) seedbuf, sizeof(seedbuf));
+    if (SUHOSIN7_G(seedingkey) != NULL && *SUHOSIN7_G(seedingkey) != 0) {
+        suhosin_SHA256Update(&context, (unsigned char*)SUHOSIN7_G(seedingkey), strlen(SUHOSIN7_G(seedingkey)));
+    }
+    suhosin_SHA256Final((void *)entropybuf, &context);
+}
+/* }}} */
+
+
+/* {{{ suhosin_srand_auto
+ */
+static void suhosin_srand_auto(TSRMLS_D)
+{
+        php_uint32 seed[8];    
+        SUHOSIN7_Gen_entropy(&seed[0] TSRMLS_CC);
+
+        suhosin_mt_init_by_array(seed, 8, SUHOSIN7_G(r_state));
+        suhosin_mt_reload(SUHOSIN7_G(r_state), &SUHOSIN7_G(r_next), &SUHOSIN7_G(r_left));
+
+        /* Seed only once */
+        SUHOSIN7_G(r_is_seeded) = 1;
+}
+/* }}} */
+
+/* {{{ suhosin_mt_srand_auto
+ */
+static void suhosin_mt_srand_auto(TSRMLS_D)
+{
+        php_uint32 seed[8];    
+        SUHOSIN7_Gen_entropy(&seed[0] TSRMLS_CC);
+
+        suhosin_mt_init_by_array(seed, 8, SUHOSIN7_G(mt_state));
+        suhosin_mt_reload(SUHOSIN7_G(mt_state), &SUHOSIN7_G(mt_next), &SUHOSIN7_G(mt_left));
+
+        /* Seed only once */
+        SUHOSIN7_G(mt_is_seeded) = 1;
+}
+/* }}} */
+
+
+/* {{{ suhosin_srand
+ */
+static void suhosin_srand(php_uint32 seed TSRMLS_DC)
+{
+        /* Seed the generator with a simple uint32 */
+        suhosin_mt_initialize(seed+0x12345, SUHOSIN7_G(r_state));
+        suhosin_mt_reload(SUHOSIN7_G(r_state), &SUHOSIN7_G(r_next), &SUHOSIN7_G(r_left));
+
+        /* Seed only once */
+        SUHOSIN7_G(r_is_seeded) = 1;
+}
+/* }}} */
+
+/* {{{ suhosin_mt_rand
+ */
+static php_uint32 suhosin_rand(TSRMLS_D)
+{
+        /* Pull a 32-bit integer from the generator state
+           Every other access function simply transforms the numbers extracted here */
+        
+        register php_uint32 s1;
+
+        if (SUHOSIN7_G(r_left) == 0) {
+                suhosin_mt_reload(SUHOSIN7_G(r_state), &SUHOSIN7_G(r_next), &SUHOSIN7_G(r_left));
+        }
+        --SUHOSIN7_G(r_left);
+                
+        s1 = *SUHOSIN7_G(r_next)++;
+        s1 ^= (s1 >> 11);
+        s1 ^= (s1 <<  7) & 0x9d2c5680U;
+        s1 ^= (s1 << 15) & 0xefc60000U;
+        return ( s1 ^ (s1 >> 18) );
+}
+/* }}} */
+
+static int ih_srand(IH_HANDLER_PARAMS)
+{
+        int argc = ZEND_NUM_ARGS();
+        long seed;
+
+        if (SUHOSIN7_G(srand_ignore)) {
+                SUHOSIN7_G(r_is_seeded) = 0;
+                return 1;
+        }
+        
+        if (zend_parse_parameters(argc TSRMLS_CC, "|l", &seed) == FAILURE) {
+                return 1;
+        }
+
+        if (argc) {
+                suhosin_srand(seed TSRMLS_CC);
+        } else {
+                suhosin_srand_auto(TSRMLS_C);
+        }
+        return (1);
+}
+
+static int ih_mt_srand(IH_HANDLER_PARAMS)
+{
+        int argc = ZEND_NUM_ARGS();
+        long seed;
+
+        if (SUHOSIN7_G(mt_srand_ignore)) {
+                SUHOSIN7_G(mt_is_seeded) = 0;
+                return 1;
+        }
+        
+        if (zend_parse_parameters(argc TSRMLS_CC, "|l", &seed) == FAILURE) {
+                return 1;
+        }
+
+        if (argc) {
+                suhosin_mt_srand(seed TSRMLS_CC);
+        } else {
+                suhosin_mt_srand_auto(TSRMLS_C);
+        }
+        return 1;
+}
+
+static int ih_mt_rand(IH_HANDLER_PARAMS)
+{
+        int argc = ZEND_NUM_ARGS();
+        long min;
+        long max;
+        long number;
+
+        if (argc != 0 && zend_parse_parameters(argc TSRMLS_CC, "ll", &min, &max) == FAILURE) {
+            return (1);        
+        }
+
+        if (!SUHOSIN7_G(mt_is_seeded)) {
+                suhosin_mt_srand_auto(TSRMLS_C);
+        }
+
+        number = (long) (suhosin_mt_rand(TSRMLS_C) >> 1);
+        if (argc == 2) {
+                RAND_RANGE(number, min, max, PHP_MT_RAND_MAX);
+        }
+
+        RETVAL_LONG(number);
+        return (1);
+}
+
+static int ih_rand(IH_HANDLER_PARAMS)
+{
+        int argc = ZEND_NUM_ARGS();
+        long min;
+        long max;
+        long number;
+
+        if (argc != 0 && zend_parse_parameters(argc TSRMLS_CC, "ll", &min, &max) == FAILURE) {
+            return (1);        
+        }
+
+        if (!SUHOSIN7_G(r_is_seeded)) {
+                suhosin_srand_auto(TSRMLS_C);
+        }
+
+        number = (long) (suhosin_rand(TSRMLS_C) >> 1);
+        if (argc == 2) {
+                RAND_RANGE(number, min, max, PHP_MT_RAND_MAX);
+        }
+
+        RETVAL_LONG(number);
+        return (1);
+}
+
+static int ih_getrandmax(IH_HANDLER_PARAMS)
+{
+        if (zend_parse_parameters_none() == FAILURE) {
+                return(0);
+        }
+        RETVAL_LONG(PHP_MT_RAND_MAX);
+        return (1);
+}