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Add zero padding

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Manuel Pégourié-Gonnard 2013-07-26 16:05:14 +02:00 committed by Paul Bakker
parent 8d4291b52a
commit 0e7d2c0f95
7 changed files with 299 additions and 3 deletions
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1
include/polarssl/cipher.h
View file

@ -108,6 +108,7 @@ typedef enum {
POLARSSL_PADDING_PKCS7 = 0, /**< PKCS7 padding (default) */
POLARSSL_PADDING_ONE_AND_ZEROS, /**< ISO/IEC 7816-4 padding */
POLARSSL_PADDING_ZEROS_AND_LEN, /**< ANSI X.923 padding */
POLARSSL_PADDING_ZEROS, /**< zero padding (not reversible!) */
} cipher_padding_t;
typedef enum {

34
library/cipher.c
View file

@ -630,6 +630,33 @@ static int get_zeros_and_len_padding( unsigned char *input, size_t input_len,
return 0;
}
/*
* Zero padding: fill with 00 ... 00
*/
static void add_zeros_padding( unsigned char *output,
size_t output_len, size_t data_len )
{
unsigned char i;
for( i = data_len; i < output_len; i++ )
output[i] = 0x00;
}
static int get_zeros_padding( unsigned char *input, size_t input_len,
size_t *data_len )
{
unsigned char *p = input + input_len - 1;
if( NULL == input || NULL == data_len )
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
while( *p == 0x00 && p > input )
--p;
*data_len = *p == 0x00 ? 0 : p - input + 1;
return 0;
}
int cipher_finish( cipher_context_t *ctx, unsigned char *output, size_t *olen)
{
int ret = 0;
@ -709,6 +736,13 @@ int cipher_set_padding_mode( cipher_context_t *ctx, cipher_padding_t mode )
return 0;
}
if( POLARSSL_PADDING_ZEROS == mode )
{
ctx->add_padding = add_zeros_padding;
ctx->get_padding = get_zeros_padding;
return 0;
}
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
}

60
tests/suites/test_suite_cipher.aes.data
View file

@ -185,6 +185,66 @@ AES Encrypt and decrypt 49 bytes with zeros and len padding
depends_on:POLARSSL_AES_C
enc_dec_buf:POLARSSL_CIPHER_AES_128_CBC:AES-128-CBC:128:49:POLARSSL_PADDING_ZEROS_AND_LEN
AES Encrypt and decrypt 0 bytes with zeros padding
depends_on:POLARSSL_AES_C
enc_dec_buf:POLARSSL_CIPHER_AES_128_CBC:AES-128-CBC:128:0:POLARSSL_PADDING_ZEROS
AES Encrypt and decrypt 1 byte with zeros padding
depends_on:POLARSSL_AES_C
enc_dec_buf:POLARSSL_CIPHER_AES_128_CBC:AES-128-CBC:128:1:POLARSSL_PADDING_ZEROS
AES Encrypt and decrypt 2 bytes with zeros padding
depends_on:POLARSSL_AES_C
enc_dec_buf:POLARSSL_CIPHER_AES_128_CBC:AES-128-CBC:128:2:POLARSSL_PADDING_ZEROS
AES Encrypt and decrypt 7 bytes with zeros padding
depends_on:POLARSSL_AES_C
enc_dec_buf:POLARSSL_CIPHER_AES_128_CBC:AES-128-CBC:128:7:POLARSSL_PADDING_ZEROS
AES Encrypt and decrypt 8 bytes with zeros padding
depends_on:POLARSSL_AES_C
enc_dec_buf:POLARSSL_CIPHER_AES_128_CBC:AES-128-CBC:128:8:POLARSSL_PADDING_ZEROS
AES Encrypt and decrypt 9 bytes with zeros padding
depends_on:POLARSSL_AES_C
enc_dec_buf:POLARSSL_CIPHER_AES_128_CBC:AES-128-CBC:128:9:POLARSSL_PADDING_ZEROS
AES Encrypt and decrypt 15 bytes with zeros padding
depends_on:POLARSSL_AES_C
enc_dec_buf:POLARSSL_CIPHER_AES_128_CBC:AES-128-CBC:128:15:POLARSSL_PADDING_ZEROS
AES Encrypt and decrypt 16 bytes with zeros padding
depends_on:POLARSSL_AES_C
enc_dec_buf:POLARSSL_CIPHER_AES_128_CBC:AES-128-CBC:128:16:POLARSSL_PADDING_ZEROS
AES Encrypt and decrypt 17 bytes with zeros padding
depends_on:POLARSSL_AES_C
enc_dec_buf:POLARSSL_CIPHER_AES_128_CBC:AES-128-CBC:128:17:POLARSSL_PADDING_ZEROS
AES Encrypt and decrypt 31 bytes with zeros padding
depends_on:POLARSSL_AES_C
enc_dec_buf:POLARSSL_CIPHER_AES_128_CBC:AES-128-CBC:128:31:POLARSSL_PADDING_ZEROS
AES Encrypt and decrypt 32 bytes with zeros padding
depends_on:POLARSSL_AES_C
enc_dec_buf:POLARSSL_CIPHER_AES_128_CBC:AES-128-CBC:128:32:POLARSSL_PADDING_ZEROS
AES Encrypt and decrypt 33 bytes with zeros padding
depends_on:POLARSSL_AES_C
enc_dec_buf:POLARSSL_CIPHER_AES_128_CBC:AES-128-CBC:128:33:POLARSSL_PADDING_ZEROS
AES Encrypt and decrypt 47 bytes with zeros padding
depends_on:POLARSSL_AES_C
enc_dec_buf:POLARSSL_CIPHER_AES_128_CBC:AES-128-CBC:128:47:POLARSSL_PADDING_ZEROS
AES Encrypt and decrypt 48 bytes with zeros padding
depends_on:POLARSSL_AES_C
enc_dec_buf:POLARSSL_CIPHER_AES_128_CBC:AES-128-CBC:128:48:POLARSSL_PADDING_ZEROS
AES Encrypt and decrypt 49 bytes with zeros padding
depends_on:POLARSSL_AES_C
enc_dec_buf:POLARSSL_CIPHER_AES_128_CBC:AES-128-CBC:128:49:POLARSSL_PADDING_ZEROS
AES Encrypt and decrypt 0 bytes in multiple parts
depends_on:POLARSSL_AES_C
enc_dec_buf_multipart:POLARSSL_CIPHER_AES_128_CBC:128:0:0:

60
tests/suites/test_suite_cipher.blowfish.data
View file

@ -185,6 +185,66 @@ BLOWFISH Encrypt and decrypt 49 bytes with zeros and len padding
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf:POLARSSL_CIPHER_BLOWFISH_CBC:BLOWFISH-CBC:128:49:POLARSSL_PADDING_ZEROS_AND_LEN
BLOWFISH Encrypt and decrypt 0 bytes with zeros padding
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf:POLARSSL_CIPHER_BLOWFISH_CBC:BLOWFISH-CBC:128:0:POLARSSL_PADDING_ZEROS
BLOWFISH Encrypt and decrypt 1 byte with zeros padding
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf:POLARSSL_CIPHER_BLOWFISH_CBC:BLOWFISH-CBC:128:1:POLARSSL_PADDING_ZEROS
BLOWFISH Encrypt and decrypt 2 bytes with zeros padding
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf:POLARSSL_CIPHER_BLOWFISH_CBC:BLOWFISH-CBC:128:2:POLARSSL_PADDING_ZEROS
BLOWFISH Encrypt and decrypt 7 bytes with zeros padding
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf:POLARSSL_CIPHER_BLOWFISH_CBC:BLOWFISH-CBC:128:7:POLARSSL_PADDING_ZEROS
BLOWFISH Encrypt and decrypt 8 bytes with zeros padding
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf:POLARSSL_CIPHER_BLOWFISH_CBC:BLOWFISH-CBC:128:8:POLARSSL_PADDING_ZEROS
BLOWFISH Encrypt and decrypt 9 bytes with zeros padding
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf:POLARSSL_CIPHER_BLOWFISH_CBC:BLOWFISH-CBC:128:9:POLARSSL_PADDING_ZEROS
BLOWFISH Encrypt and decrypt 15 bytes with zeros padding
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf:POLARSSL_CIPHER_BLOWFISH_CBC:BLOWFISH-CBC:128:15:POLARSSL_PADDING_ZEROS
BLOWFISH Encrypt and decrypt 16 bytes with zeros padding
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf:POLARSSL_CIPHER_BLOWFISH_CBC:BLOWFISH-CBC:128:16:POLARSSL_PADDING_ZEROS
BLOWFISH Encrypt and decrypt 17 bytes with zeros padding
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf:POLARSSL_CIPHER_BLOWFISH_CBC:BLOWFISH-CBC:128:17:POLARSSL_PADDING_ZEROS
BLOWFISH Encrypt and decrypt 31 bytes with zeros padding
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf:POLARSSL_CIPHER_BLOWFISH_CBC:BLOWFISH-CBC:128:31:POLARSSL_PADDING_ZEROS
BLOWFISH Encrypt and decrypt 32 bytes with zeros padding
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf:POLARSSL_CIPHER_BLOWFISH_CBC:BLOWFISH-CBC:128:32:POLARSSL_PADDING_ZEROS
BLOWFISH Encrypt and decrypt 32 bytes with zeros padding
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf:POLARSSL_CIPHER_BLOWFISH_CBC:BLOWFISH-CBC:128:33:POLARSSL_PADDING_ZEROS
BLOWFISH Encrypt and decrypt 47 bytes with zeros padding
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf:POLARSSL_CIPHER_BLOWFISH_CBC:BLOWFISH-CBC:128:47:POLARSSL_PADDING_ZEROS
BLOWFISH Encrypt and decrypt 48 bytes with zeros padding
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf:POLARSSL_CIPHER_BLOWFISH_CBC:BLOWFISH-CBC:128:48:POLARSSL_PADDING_ZEROS
BLOWFISH Encrypt and decrypt 49 bytes with zeros padding
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf:POLARSSL_CIPHER_BLOWFISH_CBC:BLOWFISH-CBC:128:49:POLARSSL_PADDING_ZEROS
BLOWFISH Encrypt and decrypt 0 bytes in multiple parts
depends_on:POLARSSL_BLOWFISH_C
enc_dec_buf_multipart:POLARSSL_CIPHER_BLOWFISH_CBC:128:0:0:

60
tests/suites/test_suite_cipher.camellia.data
View file

@ -185,6 +185,66 @@ CAMELLIA Encrypt and decrypt 49 bytes with zeros and len padding
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf:POLARSSL_CIPHER_CAMELLIA_128_CBC:CAMELLIA-128-CBC:128:49:POLARSSL_PADDING_ZEROS_AND_LEN
CAMELLIA Encrypt and decrypt 0 bytes with zeros padding
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf:POLARSSL_CIPHER_CAMELLIA_128_CBC:CAMELLIA-128-CBC:128:0:POLARSSL_PADDING_ZEROS
CAMELLIA Encrypt and decrypt 1 byte with zeros padding
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf:POLARSSL_CIPHER_CAMELLIA_128_CBC:CAMELLIA-128-CBC:128:1:POLARSSL_PADDING_ZEROS
CAMELLIA Encrypt and decrypt 2 bytes with zeros padding
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf:POLARSSL_CIPHER_CAMELLIA_128_CBC:CAMELLIA-128-CBC:128:2:POLARSSL_PADDING_ZEROS
CAMELLIA Encrypt and decrypt 7 bytes with zeros padding
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf:POLARSSL_CIPHER_CAMELLIA_128_CBC:CAMELLIA-128-CBC:128:7:POLARSSL_PADDING_ZEROS
CAMELLIA Encrypt and decrypt 8 bytes with zeros padding
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf:POLARSSL_CIPHER_CAMELLIA_128_CBC:CAMELLIA-128-CBC:128:8:POLARSSL_PADDING_ZEROS
CAMELLIA Encrypt and decrypt 9 bytes with zeros padding
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf:POLARSSL_CIPHER_CAMELLIA_128_CBC:CAMELLIA-128-CBC:128:9:POLARSSL_PADDING_ZEROS
CAMELLIA Encrypt and decrypt 15 bytes with zeros padding
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf:POLARSSL_CIPHER_CAMELLIA_128_CBC:CAMELLIA-128-CBC:128:15:POLARSSL_PADDING_ZEROS
CAMELLIA Encrypt and decrypt 16 bytes with zeros padding
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf:POLARSSL_CIPHER_CAMELLIA_128_CBC:CAMELLIA-128-CBC:128:16:POLARSSL_PADDING_ZEROS
CAMELLIA Encrypt and decrypt 17 bytes with zeros padding
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf:POLARSSL_CIPHER_CAMELLIA_128_CBC:CAMELLIA-128-CBC:128:17:POLARSSL_PADDING_ZEROS
CAMELLIA Encrypt and decrypt 31 bytes with zeros padding
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf:POLARSSL_CIPHER_CAMELLIA_128_CBC:CAMELLIA-128-CBC:128:31:POLARSSL_PADDING_ZEROS
CAMELLIA Encrypt and decrypt 32 bytes with zeros padding
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf:POLARSSL_CIPHER_CAMELLIA_128_CBC:CAMELLIA-128-CBC:128:32:POLARSSL_PADDING_ZEROS
CAMELLIA Encrypt and decrypt 32 bytes with zeros padding
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf:POLARSSL_CIPHER_CAMELLIA_128_CBC:CAMELLIA-128-CBC:128:33:POLARSSL_PADDING_ZEROS
CAMELLIA Encrypt and decrypt 47 bytes with zeros padding
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf:POLARSSL_CIPHER_CAMELLIA_128_CBC:CAMELLIA-128-CBC:128:47:POLARSSL_PADDING_ZEROS
CAMELLIA Encrypt and decrypt 48 bytes with zeros padding
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf:POLARSSL_CIPHER_CAMELLIA_128_CBC:CAMELLIA-128-CBC:128:48:POLARSSL_PADDING_ZEROS
CAMELLIA Encrypt and decrypt 49 bytes with zeros padding
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf:POLARSSL_CIPHER_CAMELLIA_128_CBC:CAMELLIA-128-CBC:128:49:POLARSSL_PADDING_ZEROS
CAMELLIA Encrypt and decrypt 0 bytes in multiple parts
depends_on:POLARSSL_CAMELLIA_C
enc_dec_buf_multipart:POLARSSL_CIPHER_CAMELLIA_128_CBC:128:0:0:

60
tests/suites/test_suite_cipher.des.data
View file

@ -185,6 +185,66 @@ DES Encrypt and decrypt 49 bytes with zeros and len padding
depends_on:POLARSSL_DES_C
enc_dec_buf:POLARSSL_CIPHER_DES_CBC:DES-CBC:56:49:POLARSSL_PADDING_ZEROS_AND_LEN
DES Encrypt and decrypt 0 bytes with zeros padding
depends_on:POLARSSL_DES_C
enc_dec_buf:POLARSSL_CIPHER_DES_CBC:DES-CBC:56:0:POLARSSL_PADDING_ZEROS
DES Encrypt and decrypt 1 byte with zeros padding
depends_on:POLARSSL_DES_C
enc_dec_buf:POLARSSL_CIPHER_DES_CBC:DES-CBC:56:1:POLARSSL_PADDING_ZEROS
DES Encrypt and decrypt 2 bytes with zeros padding
depends_on:POLARSSL_DES_C
enc_dec_buf:POLARSSL_CIPHER_DES_CBC:DES-CBC:56:2:POLARSSL_PADDING_ZEROS
DES Encrypt and decrypt 7 bytes with zeros padding
depends_on:POLARSSL_DES_C
enc_dec_buf:POLARSSL_CIPHER_DES_CBC:DES-CBC:56:7:POLARSSL_PADDING_ZEROS
DES Encrypt and decrypt 8 bytes with zeros padding
depends_on:POLARSSL_DES_C
enc_dec_buf:POLARSSL_CIPHER_DES_CBC:DES-CBC:56:8:POLARSSL_PADDING_ZEROS
DES Encrypt and decrypt 9 bytes with zeros padding
depends_on:POLARSSL_DES_C
enc_dec_buf:POLARSSL_CIPHER_DES_CBC:DES-CBC:56:9:POLARSSL_PADDING_ZEROS
DES Encrypt and decrypt 15 bytes with zeros padding
depends_on:POLARSSL_DES_C
enc_dec_buf:POLARSSL_CIPHER_DES_CBC:DES-CBC:56:15:POLARSSL_PADDING_ZEROS
DES Encrypt and decrypt 16 bytes with zeros padding
depends_on:POLARSSL_DES_C
enc_dec_buf:POLARSSL_CIPHER_DES_CBC:DES-CBC:56:16:POLARSSL_PADDING_ZEROS
DES Encrypt and decrypt 17 bytes with zeros padding
depends_on:POLARSSL_DES_C
enc_dec_buf:POLARSSL_CIPHER_DES_CBC:DES-CBC:56:17:POLARSSL_PADDING_ZEROS
DES Encrypt and decrypt 31 bytes with zeros padding
depends_on:POLARSSL_DES_C
enc_dec_buf:POLARSSL_CIPHER_DES_CBC:DES-CBC:56:31:POLARSSL_PADDING_ZEROS
DES Encrypt and decrypt 32 bytes with zeros padding
depends_on:POLARSSL_DES_C
enc_dec_buf:POLARSSL_CIPHER_DES_CBC:DES-CBC:56:32:POLARSSL_PADDING_ZEROS
DES Encrypt and decrypt 32 bytes with zeros padding
depends_on:POLARSSL_DES_C
enc_dec_buf:POLARSSL_CIPHER_DES_CBC:DES-CBC:56:33:POLARSSL_PADDING_ZEROS
DES Encrypt and decrypt 47 bytes with zeros padding
depends_on:POLARSSL_DES_C
enc_dec_buf:POLARSSL_CIPHER_DES_CBC:DES-CBC:56:47:POLARSSL_PADDING_ZEROS
DES Encrypt and decrypt 48 bytes with zeros padding
depends_on:POLARSSL_DES_C
enc_dec_buf:POLARSSL_CIPHER_DES_CBC:DES-CBC:56:48:POLARSSL_PADDING_ZEROS
DES Encrypt and decrypt 49 bytes with zeros padding
depends_on:POLARSSL_DES_C
enc_dec_buf:POLARSSL_CIPHER_DES_CBC:DES-CBC:56:49:POLARSSL_PADDING_ZEROS
DES Encrypt and decrypt 0 bytes in multiple parts
depends_on:POLARSSL_DES_C
enc_dec_buf_multipart:POLARSSL_CIPHER_DES_CBC:56:0:0:

21
tests/suites/test_suite_cipher.padding.data
View file

@ -120,3 +120,24 @@ check_padding:POLARSSL_PADDING_ZEROS_AND_LEN:"000004":POLARSSL_ERR_CIPHER_INVALI
Check zeros and len padding #6 (not enough zeros)
check_padding:POLARSSL_PADDING_ZEROS_AND_LEN:"DABBAD000004":POLARSSL_ERR_CIPHER_INVALID_PADDING:0
Check zeros padding #1 (correct)
check_padding:POLARSSL_PADDING_ZEROS:"DABBAD00":0:3
Check zeros padding #2 (correct)
check_padding:POLARSSL_PADDING_ZEROS:"DABBAD0000":0:3
Check zeros padding #3 (correct)
check_padding:POLARSSL_PADDING_ZEROS:"DABBAD":0:3
Check zeros padding #4 (correct)
check_padding:POLARSSL_PADDING_ZEROS:"000000":0:0
Check no padding #1 (correct by definition)
check_padding:POLARSSL_PADDING_NONE:"DABBAD00":0:4
Check no padding #2 (correct by definition)
check_padding:POLARSSL_PADDING_NONE:"DABBAD0001":0:5
Check no padding #3 (correct by definition)
check_padding:POLARSSL_PADDING_NONE:"":0:0