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add OFB mode, the final one

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This commit is contained in:
Sascha Schumann 1999-04-25 21:11:29 +00:00
parent a1a41504c7
commit 22d720e00c
2 changed files with 51 additions and 0 deletions
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50
ext/mcrypt/mcrypt.c
View file

@ -41,6 +41,7 @@ function_entry mcrypt_functions[] = {
PHP_FE(mcrypt_ecb, NULL)
PHP_FE(mcrypt_cbc, NULL)
PHP_FE(mcrypt_cfb, NULL)
PHP_FE(mcrypt_ofb, NULL)
PHP_FE(mcrypt_get_block_size, NULL)
PHP_FE(mcrypt_get_key_size, NULL)
PHP_FE(mcrypt_create_iv, NULL)
@ -180,6 +181,55 @@ PHP_FUNCTION(mcrypt_get_block_size)
RETURN_LONG(get_block_size(cipher->value.lval));
}
/* proto mcrypt_ofb(int cipher, string key, string data, int mode, string iv)
OFB crypt/decrypt data using key key with cipher cipher starting with iv */
PHP_FUNCTION(mcrypt_ofb)
{
pval *cipher, *data, *key, *mode, *iv;
int td;
char *ndata;
size_t bsize;
size_t nr;
size_t nsize;
if(ARG_COUNT(ht) != 5 ||
getParameters(ht, 5, &cipher, &key, &data, &mode, &iv) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long(cipher);
convert_to_long(mode);
convert_to_string(data);
convert_to_string(key);
convert_to_string(iv);
if(iv->value.str.len != bsize) {
php3_error(E_WARNING, MCRYPT_IV_WRONG_SIZE);
RETURN_FALSE;
}
bsize = get_block_size(cipher->value.lval);
nr = (data->value.str.len + bsize - 1) / bsize;
nsize = nr * bsize;
td = init_mcrypt_ofb(cipher->value.lval, key->value.str.val, key->value.str.len, iv->value.str.val);
if(td == -1) {
php3_error(E_WARNING, MCRYPT_FAILED);
RETURN_FALSE;
}
ndata = ecalloc(nr, bsize);
memcpy(ndata, data->value.str.val, data->value.str.len);
if(mode->value.lval == 0)
mcrypt_ofb(td, ndata, nsize);
else
mdecrypt_ofb(td, ndata, nsize);
end_mcrypt_ofb(td);
RETURN_STRINGL(ndata, nsize, 0);
}
/* proto mcrypt_cfb(int cipher, string key, string data, int mode, string iv)
CFB crypt/decrypt data using key key with cipher cipher starting with iv */
PHP_FUNCTION(mcrypt_cfb)

1
ext/mcrypt/php_mcrypt.h
View file

@ -9,6 +9,7 @@ extern zend_module_entry mcrypt_module_entry;
PHP_FUNCTION(mcrypt_ecb);
PHP_FUNCTION(mcrypt_cbc);
PHP_FUNCTION(mcrypt_cfb);
PHP_FUNCTION(mcrypt_ofb);
PHP_FUNCTION(mcrypt_get_block_size);
PHP_FUNCTION(mcrypt_get_key_size);
PHP_FUNCTION(mcrypt_create_iv);