/**
* @brief Adds padding @a padding_type to @a text
* @param return_value Result, possibly padded
* @param text Message to be padded
* @param mode Encryption mode; padding is applied only in CBC or ECB mode
* @param block_size Cipher block size
* @param padding_type Padding scheme
* @see http://www.di-mgt.com.au/cryptopad.html
*/
static void phalcon_crypt_pad_text(zval *return_value, zval *text, zval *mode, uint block_size, int padding_type TSRMLS_DC)
{
uint padding_size, i;
char padding[256];
char *str_mode;
assert(Z_TYPE_P(text) == IS_STRING);
assert(Z_TYPE_P(mode) == IS_STRING);
padding_size = 0;
str_mode = Z_STRVAL_P(mode);
if (!strcmp(str_mode, "ecb") || !strcmp(str_mode, "cbc")) {
padding_size = block_size - (Z_STRLEN_P(text) % block_size);
if (padding_size >= 256) {
RETURN_MM_FALSE;
}
switch (padding_type) {
case PHALCON_CRYPT_PADDING_ANSI_X_923:
memset(padding, 0, padding_size - 1);
padding[padding_size-1] = (unsigned char)padding_size;
break;
case PHALCON_CRYPT_PADDING_PKCS7:
memset(padding, padding_size, padding_size);
break;
case PHALCON_CRYPT_PADDING_ISO_10126:
for (i = 0; i < padding_size - 1; ++i) {
padding[i] = (unsigned char)rand();
}
padding[padding_size - 1] = (unsigned char)padding_size;
break;
case PHALCON_CRYPT_PADDING_ISO_IEC_7816_4:
padding[0] = 0x80;
memset(padding + 1, 0, padding_size - 1);
break;
case PHALCON_CRYPT_PADDING_ZERO:
memset(padding, 0, padding_size);
break;
case PHALCON_CRYPT_PADDING_SPACE:
memset(padding, 0x20, padding_size);
break;
default:
padding_size = 0;
break;
}
}
if (!padding_size) {
ZVAL_ZVAL(return_value, text, 1, 0);
}
else {
assert(padding_size <= block_size);
phalcon_concat_vs(&return_value, text, padding, padding_size, 0 TSRMLS_CC);
}
}
void phalcon_concat_svvs(zval *result, const char *op1, uint32_t op1_len, zval *op2, zval *op3, const char *op4, uint32_t op4_len, int self_var){
phalcon_concat_sv(result, op1, op1_len, op2, self_var);
phalcon_concat_vs(result, op3, op4, op4_len, 1);
}
void phalcon_concat_vsvvv(zval *result, zval *op1, const char *op2, uint32_t op2_len, zval *op3, zval *op4, zval *op5, int self_var){
phalcon_concat_vs(result, op1, op2, op2_len, self_var);
phalcon_concat_vvv(result, op3, op4, op5, 1);
}
void phalcon_concat_vvvvsvv(zval *result, zval *op1, zval *op2, zval *op3, zval *op4, const char *op5, uint32_t op5_len, zval *op6, zval *op7, int self_var){
phalcon_concat_vvv(result, op1, op2, op3, self_var);
phalcon_concat_vs(result, op4, op5, op5_len, 1);
phalcon_concat_vv(result, op6, op7, 1);
}
void phalcon_concat_vsvsvsv(zval *result, zval *op1, const char *op2, uint32_t op2_len, zval *op3, const char *op4, uint32_t op4_len, zval *op5, const char *op6, uint32_t op6_len, zval *op7, int self_var){
phalcon_concat_vs(result, op1, op2, op2_len, self_var);
phalcon_concat_vs(result, op3, op4, op4_len, 1);
phalcon_concat_vsv(result, op5, op6, op6_len, op7, 1);
}
