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Add ChaCha20 to the Cipher module

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This commit is contained in:
Daniel King 2016-05-15 19:56:20 -03:00 committed by Manuel Pégourié-Gonnard
parent 34b822ce7b
commit bd92062269
8 changed files with 231 additions and 4 deletions
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2
include/mbedtls/chacha20.h
View file

@ -121,7 +121,7 @@ int mbedtls_chacha20_starts( mbedtls_chacha20_context* ctx,
* output pointers are NULL.
* Otherwise, 0 is returned to indicate success.
*/
int mbedtls_chacha20_process( mbedtls_chacha20_context *ctx,
int mbedtls_chacha20_update( mbedtls_chacha20_context *ctx,
size_t size,
const unsigned char *input,
unsigned char *output );

4
include/mbedtls/cipher.h
View file

@ -86,6 +86,7 @@ typedef enum {
MBEDTLS_CIPHER_ID_CAMELLIA, /**< The Camellia cipher. */
MBEDTLS_CIPHER_ID_BLOWFISH, /**< The Blowfish cipher. */
MBEDTLS_CIPHER_ID_ARC4, /**< The RC4 cipher. */
MBEDTLS_CIPHER_ID_CHACHA20, /**< The Chacha20 cipher. */
} mbedtls_cipher_id_t;
/**
@ -145,6 +146,7 @@ typedef enum {
MBEDTLS_CIPHER_CAMELLIA_128_CCM, /**< Camellia cipher with 128-bit CCM mode. */
MBEDTLS_CIPHER_CAMELLIA_192_CCM, /**< Camellia cipher with 192-bit CCM mode. */
MBEDTLS_CIPHER_CAMELLIA_256_CCM, /**< Camellia cipher with 256-bit CCM mode. */
MBEDTLS_CIPHER_CHACHA20, /**< Chacha20 stream cipher. */
} mbedtls_cipher_type_t;
/** Supported cipher modes. */
@ -190,7 +192,7 @@ enum {
/** Maximum length of any IV, in Bytes. */
#define MBEDTLS_MAX_IV_LENGTH 16
/** Maximum block size of any cipher, in Bytes. */
#define MBEDTLS_MAX_BLOCK_LENGTH 16
#define MBEDTLS_MAX_BLOCK_LENGTH 64
/**
* Base cipher information (opaque struct).

4
library/chacha20.c
View file

@ -245,7 +245,7 @@ int mbedtls_chacha20_starts( mbedtls_chacha20_context* ctx,
return( 0 );
}
int mbedtls_chacha20_process( mbedtls_chacha20_context *ctx,
int mbedtls_chacha20_update( mbedtls_chacha20_context *ctx,
size_t size,
const unsigned char *input,
unsigned char *output )
@ -333,7 +333,7 @@ int mbedtls_chacha20_crypt( const unsigned char key[32],
if ( result != 0 )
goto cleanup;
result = mbedtls_chacha20_process( &ctx, data_len, input, output );
result = mbedtls_chacha20_update( &ctx, data_len, input, output );
cleanup:
mbedtls_chacha20_free( &ctx );

31
library/cipher.c
View file

@ -46,6 +46,10 @@
#include "mbedtls/ccm.h"
#endif
#if defined(MBEDTLS_CHACHA20_C)
#include "mbedtls/chacha20.h"
#endif
#if defined(MBEDTLS_CMAC_C)
#include "mbedtls/cmac.h"
#endif
@ -231,6 +235,18 @@ int mbedtls_cipher_set_iv( mbedtls_cipher_context_t *ctx,
return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
}
#if defined(MBEDTLS_CHACHA20_C)
if ( ctx->cipher_info->type == MBEDTLS_CIPHER_CHACHA20 )
{
if ( 0 != mbedtls_chacha20_starts( (mbedtls_chacha20_context*)ctx->cipher_ctx,
iv,
0U ) ) /* Initial counter value */
{
return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
}
}
#endif
memcpy( ctx->iv, iv, actual_iv_size );
ctx->iv_size = actual_iv_size;
@ -314,6 +330,16 @@ int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx, const unsigned char *i
return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
}
#if defined(MBEDTLS_CHACHA20_C)
if ( ctx->cipher_info->type == MBEDTLS_CIPHER_CHACHA20 )
{
*olen = ilen;
return mbedtls_chacha20_update( (mbedtls_chacha20_context*) ctx->cipher_ctx,
ilen, input, output );
}
#endif
#if defined(MBEDTLS_CIPHER_MODE_CBC)
if( ctx->cipher_info->mode == MBEDTLS_MODE_CBC )
{
@ -646,6 +672,11 @@ int mbedtls_cipher_finish( mbedtls_cipher_context_t *ctx,
return( 0 );
}
if ( MBEDTLS_CIPHER_CHACHA20 == ctx->cipher_info->type )
{
return( 0 );
}
if( MBEDTLS_MODE_ECB == ctx->cipher_info->mode )
{
if( ctx->unprocessed_len != 0 )

73
library/cipher_wrap.c
View file

@ -53,6 +53,10 @@
#include "mbedtls/blowfish.h"
#endif
#if defined(MBEDTLS_CHACHA20_C)
#include "mbedtls/chacha20.h"
#endif
#if defined(MBEDTLS_GCM_C)
#include "mbedtls/gcm.h"
#endif
@ -1283,6 +1287,71 @@ static const mbedtls_cipher_info_t arc4_128_info = {
};
#endif /* MBEDTLS_ARC4_C */
#if defined(MBEDTLS_CHACHA20_C)
static int chacha20_setkey_wrap( void *ctx, const unsigned char *key,
unsigned int key_bitlen )
{
if( key_bitlen != 256U )
return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
if ( 0 != mbedtls_chacha20_setkey( (mbedtls_chacha20_context*)ctx, key ) )
return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
return( 0 );
}
static void * chacha20_ctx_alloc( void )
{
mbedtls_chacha20_context *ctx;
ctx = mbedtls_calloc( 1, sizeof( mbedtls_chacha20_context ) );
if( ctx == NULL )
return( NULL );
mbedtls_chacha20_init( ctx );
return( ctx );
}
static void chacha20_ctx_free( void *ctx )
{
mbedtls_chacha20_free( (mbedtls_chacha20_context *) ctx );
mbedtls_free( ctx );
}
static const mbedtls_cipher_base_t chacha20_base_info = {
MBEDTLS_CIPHER_ID_CHACHA20,
NULL,
#if defined(MBEDTLS_CIPHER_MODE_CBC)
NULL,
#endif
#if defined(MBEDTLS_CIPHER_MODE_CFB)
NULL,
#endif
#if defined(MBEDTLS_CIPHER_MODE_CTR)
NULL,
#endif
#if defined(MBEDTLS_CIPHER_MODE_STREAM)
NULL,
#endif
chacha20_setkey_wrap,
chacha20_setkey_wrap,
chacha20_ctx_alloc,
chacha20_ctx_free
};
static const mbedtls_cipher_info_t chacha20_info = {
MBEDTLS_CIPHER_CHACHA20,
MBEDTLS_MODE_NONE,
256,
"CHACHA20",
12,
0,
64,
&chacha20_base_info
};
#endif /* MBEDTLS_CHACHA20_C */
#if defined(MBEDTLS_CIPHER_NULL_CIPHER)
static int null_crypt_stream( void *ctx, size_t length,
const unsigned char *input,
@ -1438,6 +1507,10 @@ const mbedtls_cipher_definition_t mbedtls_cipher_definitions[] =
#endif
#endif /* MBEDTLS_DES_C */
#if defined(MBEDTLS_CHACHA20_C)
{ MBEDTLS_CIPHER_CHACHA20, &chacha20_info },
#endif
#if defined(MBEDTLS_CIPHER_NULL_CIPHER)
{ MBEDTLS_CIPHER_NULL, &null_cipher_info },
#endif /* MBEDTLS_CIPHER_NULL_CIPHER */

1
tests/CMakeLists.txt
View file

@ -60,6 +60,7 @@ add_test_suite(cipher cipher.arc4)
add_test_suite(cipher cipher.blowfish)
add_test_suite(cipher cipher.camellia)
add_test_suite(cipher cipher.ccm)
add_test_suite(cipher cipher.chacha20)
add_test_suite(cipher cipher.des)
add_test_suite(cipher cipher.gcm)
add_test_suite(cipher cipher.null)

9
tests/Makefile
View file

@ -53,6 +53,7 @@ APPS = test_suite_aes.ecb$(EXEXT) test_suite_aes.cbc$(EXEXT) \
test_suite_chacha20$(EXEXT) test_suite_cmac$(EXEXT) \
test_suite_cipher.aes$(EXEXT) \
test_suite_cipher.arc4$(EXEXT) test_suite_cipher.ccm$(EXEXT) \
test_suite_cipher.chacha20$(EXEXT) \
test_suite_cipher.gcm$(EXEXT) \
test_suite_cipher.blowfish$(EXEXT) \
test_suite_cipher.camellia$(EXEXT) \
@ -125,6 +126,10 @@ test_suite_cipher.ccm.c : suites/test_suite_cipher.function suites/test_suite_ci
echo " Gen $@"
perl scripts/generate_code.pl suites test_suite_cipher test_suite_cipher.ccm
test_suite_cipher.chacha20.c : suites/test_suite_cipher.function suites/test_suite_cipher.chacha20.data scripts/generate_code.pl suites/helpers.function suites/main_test.function
echo " Gen $@"
perl scripts/generate_code.pl suites test_suite_cipher test_suite_cipher.chacha20
test_suite_cipher.gcm.c : suites/test_suite_cipher.function suites/test_suite_cipher.gcm.data scripts/generate_code.pl suites/helpers.function suites/main_test.function
echo " Gen $@"
perl scripts/generate_code.pl suites test_suite_cipher test_suite_cipher.gcm
@ -257,6 +262,10 @@ test_suite_cipher.ccm$(EXEXT): test_suite_cipher.ccm.c $(DEP)
echo " CC $<"
$(CC) $(LOCAL_CFLAGS) $(CFLAGS) $< $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@
test_suite_cipher.chacha20$(EXEXT): test_suite_cipher.chacha20.c $(DEP)
echo " CC $<"
$(CC) $(LOCAL_CFLAGS) $(CFLAGS) $< $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@
test_suite_cipher.gcm$(EXEXT): test_suite_cipher.gcm.c $(DEP)
echo " CC $<"
$(CC) $(LOCAL_CFLAGS) $(CFLAGS) $< $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@

111
tests/suites/test_suite_cipher.chacha20.data Normal file
View file

@ -0,0 +1,111 @@
Decrypt empty buffer
depends_on:MBEDTLS_CHACHA20_C:
dec_empty_buf:
ChaCha20 Encrypt and decrypt 0 bytes
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf:MBEDTLS_CIPHER_CHACHA20:"CHACHA20":256:0:-1
ChaCha20 Encrypt and decrypt 1 bytes
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf:MBEDTLS_CIPHER_CHACHA20:"CHACHA20":256:1:-1
ChaCha20 Encrypt and decrypt 2 bytes
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf:MBEDTLS_CIPHER_CHACHA20:"CHACHA20":256:2:-1
ChaCha20 Encrypt and decrypt 7 bytes
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf:MBEDTLS_CIPHER_CHACHA20:"CHACHA20":256:7:-1
ChaCha20 Encrypt and decrypt 8 bytes
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf:MBEDTLS_CIPHER_CHACHA20:"CHACHA20":256:8:-1
ChaCha20 Encrypt and decrypt 9 bytes
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf:MBEDTLS_CIPHER_CHACHA20:"CHACHA20":256:9:-1
ChaCha20 Encrypt and decrypt 15 bytes
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf:MBEDTLS_CIPHER_CHACHA20:"CHACHA20":256:15:-1
ChaCha20 Encrypt and decrypt 16 bytes
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf:MBEDTLS_CIPHER_CHACHA20:"CHACHA20":256:16:-1
ChaCha20 Encrypt and decrypt 17 bytes
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf:MBEDTLS_CIPHER_CHACHA20:"CHACHA20":256:17:-1
ChaCha20 Encrypt and decrypt 31 bytes
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf:MBEDTLS_CIPHER_CHACHA20:"CHACHA20":256:31:-1
ChaCha20 Encrypt and decrypt 32 bytes
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf:MBEDTLS_CIPHER_CHACHA20:"CHACHA20":256:32:-1
ChaCha20 Encrypt and decrypt 33 bytes
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf:MBEDTLS_CIPHER_CHACHA20:"CHACHA20":256:33:-1
ChaCha20 Encrypt and decrypt 47 bytes
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf:MBEDTLS_CIPHER_CHACHA20:"CHACHA20":256:47:-1
ChaCha20 Encrypt and decrypt 48 bytes
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf:MBEDTLS_CIPHER_CHACHA20:"CHACHA20":256:48:-1
ChaCha20 Encrypt and decrypt 49 bytes
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf:MBEDTLS_CIPHER_CHACHA20:"CHACHA20":256:49:-1
ChaCha20 Encrypt and decrypt 0 bytes in multiple parts 1
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf_multipart:MBEDTLS_CIPHER_CHACHA20:256:0:0:-1:0:0:0:0
ChaCha20 Encrypt and decrypt 1 bytes in multiple parts 1
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf_multipart:MBEDTLS_CIPHER_CHACHA20:256:1:0:-1:1:0:1:0
ChaCha20 Encrypt and decrypt 1 bytes in multiple parts 2
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf_multipart:MBEDTLS_CIPHER_CHACHA20:256:0:1:-1:0:1:0:1
ChaCha20 Encrypt and decrypt 16 bytes in multiple parts 1
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf_multipart:MBEDTLS_CIPHER_CHACHA20:256:16:0:-1:16:0:16:0
ChaCha20 Encrypt and decrypt 16 bytes in multiple parts 2
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf_multipart:MBEDTLS_CIPHER_CHACHA20:256:0:16:-1:0:16:0:16
ChaCha20 Encrypt and decrypt 16 bytes in multiple parts 3
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf_multipart:MBEDTLS_CIPHER_CHACHA20:256:1:15:-1:1:15:1:15
ChaCha20 Encrypt and decrypt 16 bytes in multiple parts 4
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf_multipart:MBEDTLS_CIPHER_CHACHA20:256:15:1:-1:15:1:15:1
ChaCha20 Encrypt and decrypt 22 bytes in multiple parts 1
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf_multipart:MBEDTLS_CIPHER_CHACHA20:256:15:7:-1:15:7:15:7
ChaCha20 Encrypt and decrypt 22 bytes in multiple parts 2
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf_multipart:MBEDTLS_CIPHER_CHACHA20:256:7:15:-1:7:15:7:15
ChaCha20 Encrypt and decrypt 22 bytes in multiple parts 3
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf_multipart:MBEDTLS_CIPHER_CHACHA20:256:16:6:-1:16:6:16:6
ChaCha20 Encrypt and decrypt 22 bytes in multiple parts 4
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf_multipart:MBEDTLS_CIPHER_CHACHA20:256:6:16:-1:6:16:6:16
ChaCha20 Encrypt and decrypt 32 bytes in multiple parts
depends_on:MBEDTLS_CHACHA20_C
enc_dec_buf_multipart:MBEDTLS_CIPHER_CHACHA20:256:16:16:-1:16:16:16:16