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add mcrypt_create_iv()

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This commit is contained in:
Sascha Schumann 1999-04-25 21:09:07 +00:00
parent 23a1d3fb91
commit a1a41504c7
2 changed files with 60 additions and 0 deletions
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59
ext/mcrypt/mcrypt.c
View File

@ -31,6 +31,8 @@
#if HAVE_LIBMCRYPT
#include "fcntl.h"
#include "php_mcrypt.h"
#include "lcrypt.h"
@ -41,6 +43,7 @@ function_entry mcrypt_functions[] = {
PHP_FE(mcrypt_cfb, NULL)
PHP_FE(mcrypt_get_block_size, NULL)
PHP_FE(mcrypt_get_key_size, NULL)
PHP_FE(mcrypt_create_iv, NULL)
{0},
};
@ -74,6 +77,16 @@ static mcrypt_global_struct mcryptg;
static int php3_minit_mcrypt(INIT_FUNC_ARGS)
{
/* modes for mcrypt_??? routines */
REGISTER_LONG_CONSTANT("MCRYPT_ENCODE", 0, 0);
REGISTER_LONG_CONSTANT("MCRYPT_DECODE", 1, 0);
/* sources for mcrypt_create_iv */
REGISTER_LONG_CONSTANT("MCRYPT_DEV_RANDOM", 0, 0);
REGISTER_LONG_CONSTANT("MCRYPT_DEV_URANDOM", 1, 0);
REGISTER_LONG_CONSTANT("MCRYPT_RAND", 2, 0);
/* ciphers */
MCRYPT_ENTRY(BLOWFISH);
MCRYPT_ENTRY(DES);
MCRYPT_ENTRY(TripleDES);
@ -91,6 +104,52 @@ static int php3_minit_mcrypt(INIT_FUNC_ARGS)
return SUCCESS;
}
typedef enum {
RANDOM = 0,
URANDOM,
RAND
} iv_source;
/* proto mcrypt_create_iv(int size, int source)
create an initializing vector (IV) */
PHP_FUNCTION(mcrypt_create_iv)
{
pval *size, *psource;
char *iv;
iv_source source;
int i;
if(ARG_COUNT(ht) != 2 || getParameters(ht, 2, &size, &psource) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long(size);
convert_to_long(psource);
source = psource->value.lval;
i = size->value.lval;
iv = ecalloc(i, 1);
if(source == RANDOM || source == URANDOM) {
int fd;
fd = open(source == RANDOM ? "/dev/random" : "/dev/urandom",
O_RDONLY);
if(fd < 0) {
efree(iv);
php3_error(E_WARNING, "cannot open source device");
RETURN_FALSE;
}
read(fd, iv, i);
close(fd);
} else {
while(i--) {
iv[i] = rand();
}
}
RETURN_STRINGL(iv, size->value.lval, 0);
}
/* proto mcrypt_get_key_size(int cipher)
get the key size of cipher */
PHP_FUNCTION(mcrypt_get_key_size)

1
ext/mcrypt/php_mcrypt.h
View File

@ -11,6 +11,7 @@ PHP_FUNCTION(mcrypt_cbc);
PHP_FUNCTION(mcrypt_cfb);
PHP_FUNCTION(mcrypt_get_block_size);
PHP_FUNCTION(mcrypt_get_key_size);
PHP_FUNCTION(mcrypt_create_iv);
#else
#define mcrypt_module_ptr NULL