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Add key management functions

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Define psa_key_type_t and a first stab at a few values.

New functions psa_import_key, psa_export_key, psa_destroy_key,
psa_get_key_information. Implement them for raw data and RSA.

Under the hood, create an in-memory, fixed-size keystore with room
for MBEDTLS_PSA_KEY_SLOT_COUNT - 1 keys.
This commit is contained in:
Gilles Peskine 2018-01-28 13:16:24 +01:00 committed by itayzafrir
parent 1d26709dbd
commit 2f9c4dc5ad
5 changed files with 488 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

113
include/psa/crypto.h
View File

@ -8,11 +8,27 @@
#include "crypto_platform.h"
#include <stddef.h>
#ifdef __DOXYGEN_ONLY__
/** \defgroup platform Implementation-specific definitions
* @{
*/
/** \brief Key slot number.
*
* This type represents key slots. It must be an unsigned integral
* type.* The choice of type is implementation-dependent.
* 0 is not a valid key slot number. The meaning of other values is
* implementation dependent.
*
* At any given point in time, each key slot either contains a
* cryptographic object, or is empty. Key slots are persistent:
* once set, the cryptographic object remains in the key slot until
* explicitly destroyed.
*/
typedef _unsigned_integral_type_ psa_key_slot_t;
/**@}*/
#endif
@ -89,6 +105,103 @@ psa_status_t psa_crypto_init(void);
/**@}*/
/** \defgroup crypto_types Key and algorithm types
* @{
*/
typedef uint32_t psa_key_type_t;
#define PSA_KEY_TYPE_NONE 0x00000000
#define PSA_KEY_TYPE_RAW_DATA 0x00000001
#define PSA_KEY_TYPE_RSA 0x40000001
#define PSA_KEY_TYPE_ECC_BASE 0x40010000
#define PSA_KEY_TYPE_VENDOR_FLAG 0x80000000
#define PSA_KEY_TYPE_ASYMMETRIC_FLAG 0x40000000
#define PSA_KEY_TYPE_ECC_TEST_MASK 0x7fff0000
#define PSA_KEY_TYPE_ECC_TEST_VALUE 0x40010000
#define PSA_KEY_TYPE_IS_VENDOR(type) \
(((type) & PSA_KEY_TYPE_VENDOR_FLAG) != 0)
#define PSA_KEY_TYPE_IS_ASYMMETRIC(type) \
(((type) & PSA_KEY_TYPE_ASYMMETRIC_FLAG) != 0)
#define PSA_KEY_TYPE_IS_ECC(type) \
(((type) & PSA_KEY_TYPE_ECC_TEST_MASK) == PSA_KEY_TYPE_ECC_TEST_VALUE)
typedef uint32_t psa_algorithm_type_t;
/**@}*/
/** \defgroup key_management Key management
* @{
*/
/**
* \brief Import a key in binary format.
*
* This function supports any output from psa_export_key().
*
* \return * \c PSA_SUCCESS: success.
* * \c PSA_ERROR_NOT_SUPPORTED
* * \c PSA_ERROR_INVALID_ARGUMENT
* * \c PSA_ERROR_INSUFFICIENT_MEMORY
* * \c PSA_ERROR_COMMUNICATION_FAILURE
* * \c PSA_ERROR_HARDWARE_FAILURE
* * \c PSA_ERROR_TAMPERING_DETECTED
*/
psa_status_t psa_import_key(psa_key_slot_t key,
psa_key_type_t type,
const uint8_t *data,
size_t data_length);
/**
* \brief Destroy a key.
*
* \return * \c PSA_SUCCESS: success.
* * \c PSA_ERROR_EMPTY_SLOT
* * \c PSA_ERROR_COMMUNICATION_FAILURE
* * \c PSA_ERROR_HARDWARE_FAILURE
* * \c PSA_ERROR_TAMPERING_DETECTED
*/
psa_status_t psa_destroy_key(psa_key_slot_t key);
/**
* \brief Get basic metadata about a key.
*
* \return * \c PSA_SUCCESS: success.
* * \c PSA_ERROR_EMPTY_SLOT
* * \c PSA_ERROR_COMMUNICATION_FAILURE
* * \c PSA_ERROR_HARDWARE_FAILURE
* * \c PSA_ERROR_TAMPERING_DETECTED
*/
psa_status_t psa_get_key_information(psa_key_slot_t key,
psa_key_type_t *type,
size_t *bits);
/**
* \brief Export a key in binary format.
*
* The output of this function can be passed to psa_import_key() to
* create an equivalent object.
*
* If a key is created with psa_import_key() and then exported with
* this function, it is not guaranteed that the resulting data is
* identical: the implementation may choose a different representation
* of the same key.
*
* \return * \c PSA_SUCCESS: success.
* * \c PSA_ERROR_EMPTY_SLOT
* * \c PSA_ERROR_COMMUNICATION_FAILURE
* * \c PSA_ERROR_HARDWARE_FAILURE
* * \c PSA_ERROR_TAMPERING_DETECTED
*/
psa_status_t psa_export_key(psa_key_slot_t key,
uint8_t *data,
size_t data_size,
size_t *data_length);
/**@}*/
#ifdef __cplusplus
}
#endif

3
include/psa/crypto_platform.h
View File

@ -36,4 +36,7 @@
/* PSA requires several types which C99 provides in stdint.h. */
#include <stdint.h>
/* Integral type representing a key slot number. */
typedef uint16_t psa_key_slot_t;
#endif /* PSA_CRYPTO_PLATFORM_H */

229
library/psa_crypto.c
View File

@ -29,8 +29,18 @@
#include "psa/crypto.h"
#include <stdlib.h>
#include <string.h>
#if defined(MBEDTLS_PLATFORM_C)
#include "mbedtls/platform.h"
#else
#define mbedtls_calloc calloc
#define mbedtls_free free
#endif
#include "mbedtls/ctr_drbg.h"
#include "mbedtls/entropy.h"
#include "mbedtls/pk.h"
/* Implementation that should never be optimized out by the compiler */
@ -39,10 +49,32 @@ static void mbedtls_zeroize( void *v, size_t n )
volatile unsigned char *p = v; while( n-- ) *p++ = 0;
}
/****************************************************************/
/* Global data, support functions and library management */
/****************************************************************/
/* Number of key slots (plus one because 0 is not used).
* The value is a compile-time constant for now, for simplicity. */
#define MBEDTLS_PSA_KEY_SLOT_COUNT 32
typedef struct {
psa_key_type_t type;
union {
struct raw_data {
uint8_t *data;
size_t bytes;
} raw;
#if defined(MBEDTLS_PK_C)
mbedtls_pk_context pk;
#endif /* MBEDTLS_PK_C */
} data;
} key_slot_t;
typedef struct {
int initialized;
mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context ctr_drbg;
key_slot_t key_slots[MBEDTLS_PSA_KEY_SLOT_COUNT];
} psa_global_data_t;
static psa_global_data_t global_data;
@ -57,13 +89,210 @@ static psa_status_t mbedtls_to_psa_error( int ret )
case MBEDTLS_ERR_ENTROPY_NO_STRONG_SOURCE:
case MBEDTLS_ERR_ENTROPY_SOURCE_FAILED:
return( PSA_ERROR_INSUFFICIENT_ENTROPY );
case MBEDTLS_ERR_PK_ALLOC_FAILED:
return( PSA_ERROR_INSUFFICIENT_MEMORY );
case MBEDTLS_ERR_PK_TYPE_MISMATCH:
case MBEDTLS_ERR_PK_BAD_INPUT_DATA:
return( PSA_ERROR_INVALID_ARGUMENT );
case MBEDTLS_ERR_PK_FILE_IO_ERROR:
return( PSA_ERROR_TAMPERING_DETECTED );
case MBEDTLS_ERR_PK_KEY_INVALID_VERSION:
case MBEDTLS_ERR_PK_KEY_INVALID_FORMAT:
return( PSA_ERROR_INVALID_ARGUMENT );
case MBEDTLS_ERR_PK_UNKNOWN_PK_ALG:
return( PSA_ERROR_NOT_SUPPORTED );
case MBEDTLS_ERR_PK_PASSWORD_REQUIRED:
case MBEDTLS_ERR_PK_PASSWORD_MISMATCH:
return( PSA_ERROR_NOT_PERMITTED );
case MBEDTLS_ERR_PK_INVALID_PUBKEY:
return( PSA_ERROR_INVALID_ARGUMENT );
case MBEDTLS_ERR_PK_INVALID_ALG:
case MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE:
case MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE:
return( PSA_ERROR_NOT_SUPPORTED );
case MBEDTLS_ERR_PK_SIG_LEN_MISMATCH:
return( PSA_ERROR_INVALID_SIGNATURE );
default:
return( PSA_ERROR_UNKNOWN_ERROR );
}
}
/****************************************************************/
/* Key management */
/****************************************************************/
psa_status_t psa_import_key(psa_key_slot_t key,
psa_key_type_t type,
const uint8_t *data,
size_t data_length)
{
key_slot_t *slot;
if( key == 0 || key > MBEDTLS_PSA_KEY_SLOT_COUNT )
return( PSA_ERROR_INVALID_ARGUMENT );
slot = &global_data.key_slots[key];
if( slot->type != PSA_KEY_TYPE_NONE )
return( PSA_ERROR_OCCUPIED_SLOT );
if( type == PSA_KEY_TYPE_RAW_DATA )
{
if( data_length > SIZE_MAX / 8 )
return( PSA_ERROR_NOT_SUPPORTED );
slot->data.raw.data = mbedtls_calloc( 1, data_length );
if( slot->data.raw.data == NULL )
return( PSA_ERROR_INSUFFICIENT_MEMORY );
memcpy( slot->data.raw.data, data, data_length );
slot->data.raw.bytes = data_length;
}
else
#if defined(MBEDTLS_PK_C) && defined(MBEDTLS_PK_PARSE_C)
if( type == PSA_KEY_TYPE_RSA || PSA_KEY_TYPE_IS_ECC( type ) )
{
int ret;
mbedtls_pk_init( &slot->data.pk );
ret = mbedtls_pk_parse_key( &slot->data.pk,
data, data_length,
NULL, 0 );
if( ret != 0 )
return( mbedtls_to_psa_error( ret ) );
}
else
#endif /* defined(MBEDTLS_PK_C) && defined(MBEDTLS_PK_PARSE_C) */
{
return( PSA_ERROR_NOT_SUPPORTED );
}
slot->type = type;
return( PSA_SUCCESS );
}
psa_status_t psa_destroy_key(psa_key_slot_t key)
{
key_slot_t *slot;
if( key == 0 || key > MBEDTLS_PSA_KEY_SLOT_COUNT )
return( PSA_ERROR_INVALID_ARGUMENT );
slot = &global_data.key_slots[key];
if( slot->type == PSA_KEY_TYPE_NONE )
return( PSA_ERROR_EMPTY_SLOT );
if( slot->type == PSA_KEY_TYPE_RAW_DATA )
{
mbedtls_free( slot->data.raw.data );
}
else
#if defined(MBEDTLS_PK_C) && defined(MBEDTLS_PK_PARSE_C)
if( slot->type == PSA_KEY_TYPE_RSA ||
PSA_KEY_TYPE_IS_ECC( slot->type ) )
{
mbedtls_pk_free( &slot->data.pk );
}
else
#endif /* defined(MBEDTLS_PK_C) && defined(MBEDTLS_PK_PARSE_C) */
{
/* Shouldn't happen: the key type is not any type that we
* put it. */
return( PSA_ERROR_TAMPERING_DETECTED );
}
mbedtls_zeroize( slot, sizeof( *slot ) );
return( PSA_SUCCESS );
}
psa_status_t psa_get_key_information(psa_key_slot_t key,
psa_key_type_t *type,
size_t *bits)
{
key_slot_t *slot;
if( key == 0 || key > MBEDTLS_PSA_KEY_SLOT_COUNT )
return( PSA_ERROR_INVALID_ARGUMENT );
slot = &global_data.key_slots[key];
if( type != NULL )
*type = slot->type;
if( bits != NULL )
*bits = 0;
if( slot->type == PSA_KEY_TYPE_NONE )
return( PSA_ERROR_EMPTY_SLOT );
if( slot->type == PSA_KEY_TYPE_RAW_DATA )
{
if( bits != NULL )
*bits = slot->data.raw.bytes * 8;
}
else
#if defined(MBEDTLS_PK_C) && defined(MBEDTLS_PK_PARSE_C)
if( slot->type == PSA_KEY_TYPE_RSA ||
PSA_KEY_TYPE_IS_ECC( slot->type ) )
{
if( bits != NULL )
*bits = mbedtls_pk_get_bitlen( &slot->data.pk );
}
else
#endif /* defined(MBEDTLS_PK_C) && defined(MBEDTLS_PK_PARSE_C) */
{
/* Shouldn't happen: the key type is not any type that we
* put it. */
return( PSA_ERROR_TAMPERING_DETECTED );
}
return( PSA_SUCCESS );
}
psa_status_t psa_export_key(psa_key_slot_t key,
uint8_t *data,
size_t data_size,
size_t *data_length)
{
key_slot_t *slot;
if( key == 0 || key > MBEDTLS_PSA_KEY_SLOT_COUNT )
return( PSA_ERROR_INVALID_ARGUMENT );
slot = &global_data.key_slots[key];
if( slot->type == PSA_KEY_TYPE_NONE )
return( PSA_ERROR_EMPTY_SLOT );
if( slot->type == PSA_KEY_TYPE_RAW_DATA )
{
if( slot->data.raw.bytes > data_size )
return( PSA_ERROR_BUFFER_TOO_SMALL );
memcpy( data, slot->data.raw.data, slot->data.raw.bytes );
*data_length = slot->data.raw.bytes;
return( PSA_SUCCESS );
}
else
#if defined(MBEDTLS_PK_C) && defined(MBEDTLS_PK_PARSE_C)
if( slot->type == PSA_KEY_TYPE_RSA ||
PSA_KEY_TYPE_IS_ECC( slot->type ) )
{
int ret;
ret = mbedtls_pk_write_key_der( &slot->data.pk,
data, data_size );
if( ret < 0 )
return( mbedtls_to_psa_error( ret ) );
*data_length = ret;
return( PSA_SUCCESS );
}
else
#endif /* defined(MBEDTLS_PK_C) && defined(MBEDTLS_PK_PARSE_C) */
{
return( PSA_ERROR_NOT_SUPPORTED );
}
}
/****************************************************************/
/* Module setup */
/****************************************************************/
void mbedtls_psa_crypto_free( void )
{
size_t key;
for( key = 1; key < MBEDTLS_PSA_KEY_SLOT_COUNT; key++ )
psa_destroy_key( key );
mbedtls_ctr_drbg_free( &global_data.ctr_drbg );
mbedtls_entropy_free( &global_data.entropy );
mbedtls_zeroize( &global_data, sizeof( global_data ) );

28
tests/suites/test_suite_psa_crypto.data
View File

@ -1,2 +1,30 @@
PSA init/deinit
init_deinit:
PSA import/export raw: 0 bytes
import_export:"":PSA_KEY_TYPE_RAW_DATA:0:0:PSA_SUCCESS:1
PSA import/export raw: 1 bytes
import_export:"2a":PSA_KEY_TYPE_RAW_DATA:8:0:PSA_SUCCESS:1
PSA import/export raw: 1 bytes, larger buffer
import_export:"2a":PSA_KEY_TYPE_RAW_DATA:8:1:PSA_SUCCESS:1
PSA import/export raw: 2 bytes, buffer too small
import_export:"2a2b":PSA_KEY_TYPE_RAW_DATA:16:-1:PSA_ERROR_BUFFER_TOO_SMALL:1
PSA import/export RSA: good
depends_on:MBEDTLS_PK_C:MBEDTLS_PK_PARSE_C:MBEDTLS_RSA_C
import_export:"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":PSA_KEY_TYPE_RSA:1024:0:PSA_SUCCESS:1
PSA import/export RSA: trailing garbage ignored
depends_on:MBEDTLS_PK_C:MBEDTLS_PK_PARSE_C:MBEDTLS_RSA_C
import_export:"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":PSA_KEY_TYPE_RSA:1024:-1:PSA_SUCCESS:0
PSA import RSA: truncated
depends_on:MBEDTLS_PK_C:MBEDTLS_PK_PARSE_C:MBEDTLS_RSA_C
import:"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":PSA_KEY_TYPE_RSA:PSA_ERROR_INVALID_ARGUMENT
#PSA import/export EC secp256r1: good
#depends_on:MBEDTLS_PK_C:MBEDTLS_PK_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED
#import_export:"3077020101042049c9a8c18c4b885638c431cf1df1c994131609b580d4fd43a0cab17db2f13eeea00a06082a8648ce3d030107a144034200047772656f814b399279d5e1f1781fac6f099a3c5ca1b0e35351834b08b65e0b572590cdaf8f769361bcf34acfc11e5e074e8426bdde04be6e653945449617de45":PSA_KEY_TYPE_ECC_NISTP256R1:256:0:PSA_SUCCESS:1

120
tests/suites/test_suite_psa_crypto.function
View File

@ -10,15 +10,125 @@
/* BEGIN_CASE */
void init_deinit()
{
psa_status_t ret;
psa_status_t status;
int i;
for( i = 0; i <= 1; i++ )
{
ret = psa_crypto_init( );
TEST_ASSERT( ret == PSA_SUCCESS );
ret = psa_crypto_init( );
TEST_ASSERT( ret == PSA_SUCCESS );
status = psa_crypto_init( );
TEST_ASSERT( status == PSA_SUCCESS );
status = psa_crypto_init( );
TEST_ASSERT( status == PSA_SUCCESS );
mbedtls_psa_crypto_free( );
}
}
/* END_CASE */
/* BEGIN_CASE */
void import( char *hex, int type, int expected_status )
{
int slot = 1;
psa_status_t status;
unsigned char *data = NULL;
size_t data_size;
data_size = strlen( hex ) / 2;
data = mbedtls_calloc( 1, data_size );
TEST_ASSERT( data != NULL );
data_size = unhexify( data, hex );
TEST_ASSERT( psa_crypto_init( ) == PSA_SUCCESS );
status = psa_import_key( slot, type, data, data_size );
TEST_ASSERT( status == (psa_status_t) expected_status );
if( status == PSA_SUCCESS )
TEST_ASSERT( psa_destroy_key( slot ) == PSA_SUCCESS );
exit:
mbedtls_free( data );
mbedtls_psa_crypto_free( );
}
/* END_CASE */
/* BEGIN_CASE */
void import_export( char *hex, int type_arg,
int expected_bits,
int export_size_delta,
int expected_export_status,
int canonical_input )
{
int slot = 1;
int slot2 = slot + 1;
psa_key_type_t type = type_arg;
psa_status_t status;
unsigned char *data = NULL;
unsigned char *exported = NULL;
unsigned char *reexported = NULL;
size_t data_size;
size_t export_size;
size_t exported_length;
size_t reexported_length;
psa_key_type_t got_type;
size_t got_bits;
data_size = strlen( hex ) / 2;
data = mbedtls_calloc( 1, data_size );
TEST_ASSERT( data != NULL );
data_size = unhexify( data, hex );
export_size = (ssize_t) data_size + export_size_delta;
exported = mbedtls_calloc( 1, export_size );
TEST_ASSERT( exported != NULL );
if( ! canonical_input )
{
reexported = mbedtls_calloc( 1, export_size );
TEST_ASSERT( reexported != NULL );
}
TEST_ASSERT( psa_crypto_init( ) == PSA_SUCCESS );
/* Import the key */
TEST_ASSERT( psa_import_key( slot, type,
data, data_size ) == PSA_SUCCESS );
/* Test the key information */
TEST_ASSERT( psa_get_key_information( slot,
&got_type, &got_bits ) ==
PSA_SUCCESS );
TEST_ASSERT( got_type == type );
TEST_ASSERT( got_bits == (size_t) expected_bits );
/* Export the key */
status = psa_export_key( slot,
exported, export_size,
&exported_length );
TEST_ASSERT( status == (psa_status_t) expected_export_status );
if( status != PSA_SUCCESS )
goto destroy;
if( canonical_input )
{
TEST_ASSERT( exported_length == data_size );
TEST_ASSERT( memcmp( exported, data, data_size ) == 0 );
}
else
{
TEST_ASSERT( psa_import_key( slot2, type,
exported, export_size ) ==
PSA_SUCCESS );
TEST_ASSERT( psa_export_key( slot2,
reexported, export_size,
&reexported_length ) ==
PSA_SUCCESS );
TEST_ASSERT( reexported_length == exported_length );
TEST_ASSERT( memcmp( reexported, exported,
exported_length ) == 0 );
}
destroy:
/* Destroy the key */
TEST_ASSERT( psa_destroy_key( slot ) == PSA_SUCCESS );
TEST_ASSERT( psa_get_key_information(
slot, NULL, NULL ) == PSA_ERROR_EMPTY_SLOT );
exit:
mbedtls_free( data );
mbedtls_psa_crypto_free( );
}
/* END_CASE */