MFH Add openssl_random_pseudo_bytes() in order to expose access to a PRG, this wraps...

- OpenBSD uses arc4random()
- Windows uses the Windows Crypto API
- FreeBSD, Linux, etc use /dev/random or /dev/urandom if available
[DOC]

diff --git a/ext/openssl/openssl.c b/ext/openssl/openssl.c
index 780313e2a40d99bd96741cbe0452daedaf42cde3..cd3b1eac4dbc0117d0d77943ba813f20bc49ba83 100644 (file)
--- a/ext/openssl/openssl.c
+++ b/ext/openssl/openssl.c
@@ -94,6 +94,7 @@ PHP_FUNCTION(openssl_encrypt);
 PHP_FUNCTION(openssl_decrypt);
 
 PHP_FUNCTION(openssl_dh_compute_key);
+PHP_FUNCTION(openssl_random_pseudo_bytes);
 
 /* {{{ arginfo */
 ZEND_BEGIN_ARG_INFO_EX(arginfo_openssl_x509_export_to_file, 0, 0, 2)
@@ -352,6 +353,11 @@ ZEND_BEGIN_ARG_INFO(arginfo_openssl_dh_compute_key, 0)
     ZEND_ARG_INFO(0, pub_key)
     ZEND_ARG_INFO(0, dh_key)
 ZEND_END_ARG_INFO()
+
+ZEND_BEGIN_ARG_INFO_EX(arginfo_openssl_random_pseudo_bytes, 0, 0, 1)
+    ZEND_ARG_INFO(0, length)
+    ZEND_ARG_INFO(1, result_is_strong)
+ZEND_END_ARG_INFO()
 /* }}} */
 
 /* {{{ openssl_functions[]
@@ -416,6 +422,7 @@ const zend_function_entry openssl_functions[] = {
 
        PHP_FE(openssl_dh_compute_key,      arginfo_openssl_dh_compute_key)
 
+       PHP_FE(openssl_random_pseudo_bytes,    arginfo_openssl_random_pseudo_bytes)
        PHP_FE(openssl_error_string, arginfo_openssl_error_string)
        {NULL, NULL, NULL}
 };
@@ -4704,6 +4711,52 @@ PHP_FUNCTION(openssl_dh_compute_key)
 }
 /* }}} */
 
+/* {{{ proto string openssl_random_pseudo_bytes(integer length [, &bool returned_strong_result])
+   Returns a string of the length specified filled with random pseudo bytes */
+PHP_FUNCTION(openssl_random_pseudo_bytes)
+{
+       long buffer_length;
+       unsigned char *buffer = NULL;
+       zval *zstrong_result_returned = NULL;
+       int strong_result = 0;
+
+       if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l|z", &buffer_length, &zstrong_result_returned) == FAILURE) {
+               return;
+       }
+
+       if (buffer_length <= 0) {
+               RETURN_FALSE;
+       }
+
+       if (zstrong_result_returned) {
+               zval_dtor(zstrong_result_returned);
+               ZVAL_BOOL(zstrong_result_returned, 0);
+       }
+
+       buffer = emalloc(buffer_length);
+
+       if (!buffer) {
+               RETURN_FALSE;
+       }
+
+#ifdef WINDOWS
+        RAND_screen();
+#endif
+
+       if ((strong_result = RAND_pseudo_bytes(buffer, buffer_length)) < 0) {
+               RETVAL_FALSE;
+       } else {
+               RETVAL_STRINGL((char *)buffer, buffer_length, 1);
+
+               if (zstrong_result_returned) {
+                       ZVAL_BOOL(zstrong_result_returned, strong_result);
+               }
+
+       }
+       efree(buffer);
+}
+/* }}} */
+
 /*
  * Local variables:
  * tab-width: 8