+#if defined(HAVE_HASH_EXT) && !defined(COMPILE_DL_HASH) && defined(HTTP_HAVE_HASH_EXT_INCLUDES)
+# define HTTP_HAVE_HASH_EXT
+# include "php_hash.h"
+# include "php_hash_sha.h"
+# include "php_hash_ripemd.h"
+#endif
+
+#ifdef HTTP_HAVE_MHASH
+# include <mhash.h>
+#endif
+
+ZEND_EXTERN_MODULE_GLOBALS(http);
+
+typedef enum {
+#ifdef HTTP_HAVE_HASH_EXT
+ HTTP_ETAG_RIPEMD160 = -8,
+ HTTP_ETAG_RIPEMD128 = -7,
+ HTTP_ETAG_SHA512 = -6,
+ HTTP_ETAG_SHA384 = -5,
+ HTTP_ETAG_SHA256 = -4,
+#endif
+ HTTP_ETAG_CRC32 = -3,
+ HTTP_ETAG_MD5 = -2,
+ HTTP_ETAG_SHA1 = -1,
+} http_etag_mode;
+
+extern PHP_MINIT_FUNCTION(http_cache);
+
+#ifdef HTTP_HAVE_MHASH
+static void *http_etag_alloc_mhash_digest(size_t size)
+{
+ return emalloc(size);
+}
+#endif
+
+#define http_etag_digest(d, l) _http_etag_digest((d), (l) TSRMLS_CC)
+static inline char *_http_etag_digest(const unsigned char *digest, int len TSRMLS_DC)
+{
+ static const char hexdigits[16] = "0123456789abcdef";
+ int i;
+ char *hex = emalloc(len * 2 + 1);
+ char *ptr = hex;
+
+ for (i = 0; i < len; ++i) {
+ *ptr++ = hexdigits[digest[i] >> 4];
+ *ptr++ = hexdigits[digest[i] & 0xF];
+ }
+ *ptr = '\0';
+
+ return hex;
+}
+
+#undef CASE_HTTP_ETAG_HASH
+#define CASE_HTTP_ETAG_HASH(HASH) \
+ case HTTP_ETAG_##HASH: \
+ PHP_##HASH##Init(ctx = emalloc(sizeof(PHP_##HASH##_CTX))); \
+ break;
+#define http_etag_init() _http_etag_init(TSRMLS_C)
+static inline void *_http_etag_init(TSRMLS_D)
+{
+ void *ctx = NULL;
+ long mode = HTTP_G(etag).mode;
+
+ switch (mode)
+ {
+ case HTTP_ETAG_CRC32:
+ ctx = emalloc(sizeof(uint));
+ *((uint *) ctx) = ~0;
+ break;
+
+#ifdef HTTP_HAVE_HASH_EXT
+ CASE_HTTP_ETAG_HASH(RIPEMD160);
+ CASE_HTTP_ETAG_HASH(RIPEMD128);
+ CASE_HTTP_ETAG_HASH(SHA512);
+ CASE_HTTP_ETAG_HASH(SHA384);
+ CASE_HTTP_ETAG_HASH(SHA256);
+#endif
+ CASE_HTTP_ETAG_HASH(SHA1);
+#ifndef HTTP_HAVE_MHASH
+ default:
+#endif
+ CASE_HTTP_ETAG_HASH(MD5);
+
+#ifdef HTTP_HAVE_MHASH
+ default:
+ if ((mode < 0) || ((ulong)mode > mhash_count()) || (!(ctx = mhash_init(mode)))) {
+ http_error_ex(HE_ERROR, HTTP_E_RUNTIME, "Invalid ETag mode: %ld", mode);
+ }
+ break;
+#endif
+ }
+
+ return ctx;
+}
+
+#undef CASE_HTTP_ETAG_HASH
+#define CASE_HTTP_ETAG_HASH(HASH) \
+ case HTTP_ETAG_##HASH: \
+ if (*((PHP_##HASH##_CTX **) ctx_ptr)) { \
+ efree(*((PHP_##HASH##_CTX **) ctx_ptr)); \
+ *((PHP_##HASH##_CTX **) ctx_ptr) = NULL; \
+ } \
+ break;
+#define http_etag_free(cp) _http_etag_free((cp) TSRMLS_CC)
+static inline void _http_etag_free(void **ctx_ptr TSRMLS_DC)
+{
+ switch (HTTP_G(etag).mode)
+ {
+ case HTTP_ETAG_CRC32:
+ if (*((uint **) ctx_ptr)) {
+ efree(*((uint **) ctx_ptr));
+ *((uint **) ctx_ptr) = NULL;
+ }
+ break;
+
+#ifdef HTTP_HAVE_HASH_EXT
+ CASE_HTTP_ETAG_HASH(RIPEMD160);
+ CASE_HTTP_ETAG_HASH(RIPEMD128);
+ CASE_HTTP_ETAG_HASH(SHA512);
+ CASE_HTTP_ETAG_HASH(SHA384);
+ CASE_HTTP_ETAG_HASH(SHA256);
+#endif
+ CASE_HTTP_ETAG_HASH(SHA1);
+#ifndef HTTP_HAVE_MHASH
+ default:
+#endif
+ CASE_HTTP_ETAG_HASH(MD5);
+
+#ifdef HTTP_HAVE_MHASH
+ default:
+ /* mhash gets already freed in http_etag_finish() */
+ if (*((MHASH *) ctx_ptr)) {
+ mhash_deinit(*((MHASH *) ctx_ptr), NULL);
+ *((MHASH *) ctx_ptr) = NULL;
+ }
+ break;
+#endif
+ }
+}
+
+#undef CASE_HTTP_ETAG_HASH
+#define CASE_HTTP_ETAG_HASH(HASH, len) \
+ case HTTP_ETAG_##HASH##: \
+ PHP_##HASH##Final(digest, *((PHP_##HASH##_CTX **) ctx_ptr)); \
+ etag = http_etag_digest(digest, len); \
+ break;
+#define http_etag_finish(c) _http_etag_finish((c) TSRMLS_CC)
+static inline char *_http_etag_finish(void **ctx_ptr TSRMLS_DC)
+{
+ char *etag = NULL;
+ unsigned char digest[128];
+ long mode = HTTP_G(etag).mode;
+
+ switch (mode)
+ {
+ case HTTP_ETAG_CRC32:
+ **((uint **) ctx_ptr) = ~**((uint **) ctx_ptr);
+ etag = http_etag_digest(*((const unsigned char **) ctx_ptr), sizeof(uint));
+ break;
+
+#ifdef HTTP_HAVE_HASH_EXT
+ CASE_HTTP_ETAG_HASH(RIPEMD160, 20);
+ CASE_HTTP_ETAG_HASH(RIPEMD128, 16);
+ CASE_HTTP_ETAG_HASH(SHA512, 64);
+ CASE_HTTP_ETAG_HASH(SHA384, 48);
+ CASE_HTTP_ETAG_HASH(SHA256, 32);
+#endif
+ CASE_HTTP_ETAG_HASH(SHA1, 20);
+#ifndef HTTP_HAVE_MHASH
+ default:
+#endif
+ CASE_HTTP_ETAG_HASH(MD5, 16);
+
+#ifdef HTTP_HAVE_MHASH
+ default:
+ {
+ unsigned char *mhash_digest = mhash_end_m(*((MHASH *) ctx_ptr), http_etag_alloc_mhash_digest);
+ etag = http_etag_digest(mhash_digest, mhash_get_block_size(mode));
+ efree(mhash_digest);
+ /* avoid double free */
+ *((MHASH *) ctx_ptr) = NULL;
+ }
+ break;
+#endif
+ }
+
+ http_etag_free(ctx_ptr);
+
+ return etag;
+}
+
+#undef CASE_HTTP_ETAG_HASH
+#define CASE_HTTP_ETAG_HASH(HASH) \
+ case HTTP_ETAG_##HASH: \
+ PHP_##HASH##Update(ctx, (const unsigned char *) data_ptr, data_len); \
+ break;
+#define http_etag_update(c, d, l) _http_etag_update((c), (d), (l) TSRMLS_CC)
+static inline void _http_etag_update(void *ctx, const char *data_ptr, size_t data_len TSRMLS_DC)
+{
+ switch (HTTP_G(etag).mode)
+ {
+ case HTTP_ETAG_CRC32:
+ {
+ uint i, c = *((uint *) ctx);
+
+ for (i = 0; i < data_len; ++i) {
+ c = CRC32(c, data_ptr[i]);
+ }
+ *((uint *)ctx) = c;
+ }
+ break;
+
+#ifdef HTTP_HAVE_HASH_EXT
+ CASE_HTTP_ETAG_HASH(RIPEMD160);
+ CASE_HTTP_ETAG_HASH(RIPEMD128);
+ CASE_HTTP_ETAG_HASH(SHA512);
+ CASE_HTTP_ETAG_HASH(SHA384);
+ CASE_HTTP_ETAG_HASH(SHA256);
+#endif
+ CASE_HTTP_ETAG_HASH(SHA1);
+#ifndef HTTP_HAVE_MHASH
+ default:
+#endif
+ CASE_HTTP_ETAG_HASH(MD5);
+
+#ifdef HTTP_HAVE_MHASH
+ default:
+ mhash(ctx, data_ptr, data_len);
+ break;
+#endif
+ }
+}
+
+#define http_ob_etaghandler(o, l, ho, hl, m) _http_ob_etaghandler((o), (l), (ho), (hl), (m) TSRMLS_CC)
+extern void _http_ob_etaghandler(char *output, uint output_len, char **handled_output, uint *handled_output_len, int mode TSRMLS_DC);
+