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Merge remote-tracking branch 'public/pr/2292' into development

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This commit is contained in:
Simon Butcher 2018-12-20 12:02:17 +00:00
commit 003c0e032f
4 changed files with 253 additions and 62 deletions
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143
include/mbedtls/ecjpake.h
View File

@ -92,28 +92,33 @@ typedef struct mbedtls_ecjpake_context
#endif /* MBEDTLS_ECJPAKE_ALT */
/**
* \brief Initialize a context
* (just makes it ready for setup() or free()).
* \brief Initialize an ECJPAKE context.
*
* \param ctx context to initialize
* \param ctx The ECJPAKE context to initialize.
* This must not be \c NULL.
*/
void mbedtls_ecjpake_init( mbedtls_ecjpake_context *ctx );
/**
* \brief Set up a context for use
* \brief Set up an ECJPAKE context for use.
*
* \note Currently the only values for hash/curve allowed by the
* standard are MBEDTLS_MD_SHA256/MBEDTLS_ECP_DP_SECP256R1.
* standard are #MBEDTLS_MD_SHA256/#MBEDTLS_ECP_DP_SECP256R1.
*
* \param ctx context to set up
* \param role Our role: client or server
* \param hash hash function to use (MBEDTLS_MD_XXX)
* \param curve elliptic curve identifier (MBEDTLS_ECP_DP_XXX)
* \param secret pre-shared secret (passphrase)
* \param len length of the shared secret
* \param ctx The ECJPAKE context to set up. This must be initialized.
* \param role The role of the caller. This must be either
* #MBEDTLS_ECJPAKE_CLIENT or #MBEDTLS_ECJPAKE_SERVER.
* \param hash The identifier of the hash function to use,
* for example #MBEDTLS_MD_SHA256.
* \param curve The identifier of the elliptic curve to use,
* for example #MBEDTLS_ECP_DP_SECP256R1.
* \param secret The pre-shared secret (passphrase). This must be
* a readable buffer of length \p len Bytes. It need
* only be valid for the duration of this call.
* \param len The length of the pre-shared secret \p secret.
*
* \return 0 if successfull,
* a negative error code otherwise
* \return \c 0 if successful.
* \return A negative error code on failure.
*/
int mbedtls_ecjpake_setup( mbedtls_ecjpake_context *ctx,
mbedtls_ecjpake_role role,
@ -123,29 +128,34 @@ int mbedtls_ecjpake_setup( mbedtls_ecjpake_context *ctx,
size_t len );
/**
* \brief Check if a context is ready for use
* \brief Check if an ECJPAKE context is ready for use.
*
* \param ctx Context to check
* \param ctx The ECJPAKE context to check. This must be
* initialized.
*
* \return 0 if the context is ready for use,
* MBEDTLS_ERR_ECP_BAD_INPUT_DATA otherwise
* \return \c 0 if the context is ready for use.
* \return #MBEDTLS_ERR_ECP_BAD_INPUT_DATA otherwise.
*/
int mbedtls_ecjpake_check( const mbedtls_ecjpake_context *ctx );
/**
* \brief Generate and write the first round message
* (TLS: contents of the Client/ServerHello extension,
* excluding extension type and length bytes)
* excluding extension type and length bytes).
*
* \param ctx Context to use
* \param buf Buffer to write the contents to
* \param len Buffer size
* \param olen Will be updated with the number of bytes written
* \param f_rng RNG function
* \param p_rng RNG parameter
* \param ctx The ECJPAKE context to use. This must be
* initialized and set up.
* \param buf The buffer to write the contents to. This must be a
* writable buffer of length \p len Bytes.
* \param len The length of \p buf in Bytes.
* \param olen The address at which to store the total number
* of Bytes written to \p buf. This must not be \c NULL.
* \param f_rng The RNG function to use. This must not be \c NULL.
* \param p_rng The RNG parameter to be passed to \p f_rng. This
* may be \c NULL if \p f_rng doesn't use a context.
*
* \return 0 if successfull,
* a negative error code otherwise
* \return \c 0 if successful.
* \return A negative error code on failure.
*/
int mbedtls_ecjpake_write_round_one( mbedtls_ecjpake_context *ctx,
unsigned char *buf, size_t len, size_t *olen,
@ -155,14 +165,16 @@ int mbedtls_ecjpake_write_round_one( mbedtls_ecjpake_context *ctx,
/**
* \brief Read and process the first round message
* (TLS: contents of the Client/ServerHello extension,
* excluding extension type and length bytes)
* excluding extension type and length bytes).
*
* \param ctx Context to use
* \param buf Pointer to extension contents
* \param len Extension length
* \param ctx The ECJPAKE context to use. This must be initialized
* and set up.
* \param buf The buffer holding the first round message. This must
* be a readable buffer of length \p len Bytes.
* \param len The length in Bytes of \p buf.
*
* \return 0 if successfull,
* a negative error code otherwise
* \return \c 0 if successful.
* \return A negative error code on failure.
*/
int mbedtls_ecjpake_read_round_one( mbedtls_ecjpake_context *ctx,
const unsigned char *buf,
@ -170,17 +182,21 @@ int mbedtls_ecjpake_read_round_one( mbedtls_ecjpake_context *ctx,
/**
* \brief Generate and write the second round message
* (TLS: contents of the Client/ServerKeyExchange)
* (TLS: contents of the Client/ServerKeyExchange).
*
* \param ctx Context to use
* \param buf Buffer to write the contents to
* \param len Buffer size
* \param olen Will be updated with the number of bytes written
* \param f_rng RNG function
* \param p_rng RNG parameter
* \param ctx The ECJPAKE context to use. This must be initialized,
* set up, and already have performed round one.
* \param buf The buffer to write the round two contents to.
* This must be a writable buffer of length \p len Bytes.
* \param len The size of \p buf in Bytes.
* \param olen The address at which to store the total number of Bytes
* written to \p buf. This must not be \c NULL.
* \param f_rng The RNG function to use. This must not be \c NULL.
* \param p_rng The RNG parameter to be passed to \p f_rng. This
* may be \c NULL if \p f_rng doesn't use a context.
*
* \return 0 if successfull,
* a negative error code otherwise
* \return \c 0 if successful.
* \return A negative error code on failure.
*/
int mbedtls_ecjpake_write_round_two( mbedtls_ecjpake_context *ctx,
unsigned char *buf, size_t len, size_t *olen,
@ -189,14 +205,16 @@ int mbedtls_ecjpake_write_round_two( mbedtls_ecjpake_context *ctx,
/**
* \brief Read and process the second round message
* (TLS: contents of the Client/ServerKeyExchange)
* (TLS: contents of the Client/ServerKeyExchange).
*
* \param ctx Context to use
* \param buf Pointer to the message
* \param len Message length
* \param ctx The ECJPAKE context to use. This must be initialized
* and set up and already have performed round one.
* \param buf The buffer holding the second round message. This must
* be a readable buffer of length \p len Bytes.
* \param len The length in Bytes of \p buf.
*
* \return 0 if successfull,
* a negative error code otherwise
* \return \c 0 if successful.
* \return A negative error code on failure.
*/
int mbedtls_ecjpake_read_round_two( mbedtls_ecjpake_context *ctx,
const unsigned char *buf,
@ -204,17 +222,21 @@ int mbedtls_ecjpake_read_round_two( mbedtls_ecjpake_context *ctx,
/**
* \brief Derive the shared secret
* (TLS: Pre-Master Secret)
* (TLS: Pre-Master Secret).
*
* \param ctx Context to use
* \param buf Buffer to write the contents to
* \param len Buffer size
* \param olen Will be updated with the number of bytes written
* \param f_rng RNG function
* \param p_rng RNG parameter
* \param ctx The ECJPAKE context to use. This must be initialized,
* set up and have performed both round one and two.
* \param buf The buffer to write the derived secret to. This must
* be a writable buffer of length \p len Bytes.
* \param len The length of \p buf in Bytes.
* \param olen The address at which to store the total number of Bytes
* written to \p buf. This must not be \c NULL.
* \param f_rng The RNG function to use. This must not be \c NULL.
* \param p_rng The RNG parameter to be passed to \p f_rng. This
* may be \c NULL if \p f_rng doesn't use a context.
*
* \return 0 if successfull,
* a negative error code otherwise
* \return \c 0 if successful.
* \return A negative error code on failure.
*/
int mbedtls_ecjpake_derive_secret( mbedtls_ecjpake_context *ctx,
unsigned char *buf, size_t len, size_t *olen,
@ -222,14 +244,15 @@ int mbedtls_ecjpake_derive_secret( mbedtls_ecjpake_context *ctx,
void *p_rng );
/**
* \brief Free a context's content
* \brief This clears an ECJPAKE context and frees any
* embedded data structure.
*
* \param ctx context to free
* \param ctx The ECJPAKE context to free. This may be \c NULL,
* in which case this function does nothing. If it is not
* \c NULL, it must point to an initialized ECJPAKE context.
*/
void mbedtls_ecjpake_free( mbedtls_ecjpake_context *ctx );
#if defined(MBEDTLS_SELF_TEST)
/**

38
library/ecjpake.c
View File

@ -33,11 +33,18 @@
#if defined(MBEDTLS_ECJPAKE_C)
#include "mbedtls/ecjpake.h"
#include "mbedtls/platform_util.h"
#include <string.h>
#if !defined(MBEDTLS_ECJPAKE_ALT)
/* Parameter validation macros based on platform_util.h */
#define ECJPAKE_VALIDATE_RET( cond ) \
MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_ECP_BAD_INPUT_DATA )
#define ECJPAKE_VALIDATE( cond ) \
MBEDTLS_INTERNAL_VALIDATE( cond )
/*
* Convert a mbedtls_ecjpake_role to identifier string
*/
@ -54,8 +61,7 @@ static const char * const ecjpake_id[] = {
*/
void mbedtls_ecjpake_init( mbedtls_ecjpake_context *ctx )
{
if( ctx == NULL )
return;
ECJPAKE_VALIDATE( ctx != NULL );
ctx->md_info = NULL;
mbedtls_ecp_group_init( &ctx->grp );
@ -106,6 +112,11 @@ int mbedtls_ecjpake_setup( mbedtls_ecjpake_context *ctx,
{
int ret;
ECJPAKE_VALIDATE_RET( ctx != NULL );
ECJPAKE_VALIDATE_RET( role == MBEDTLS_ECJPAKE_CLIENT ||
role == MBEDTLS_ECJPAKE_SERVER );
ECJPAKE_VALIDATE_RET( secret != NULL || len == 0 );
ctx->role = role;
if( ( ctx->md_info = mbedtls_md_info_from_type( hash ) ) == NULL )
@ -127,6 +138,8 @@ cleanup:
*/
int mbedtls_ecjpake_check( const mbedtls_ecjpake_context *ctx )
{
ECJPAKE_VALIDATE_RET( ctx != NULL );
if( ctx->md_info == NULL ||
ctx->grp.id == MBEDTLS_ECP_DP_NONE ||
ctx->s.p == NULL )
@ -504,6 +517,9 @@ int mbedtls_ecjpake_read_round_one( mbedtls_ecjpake_context *ctx,
const unsigned char *buf,
size_t len )
{
ECJPAKE_VALIDATE_RET( ctx != NULL );
ECJPAKE_VALIDATE_RET( buf != NULL );
return( ecjpake_kkpp_read( ctx->md_info, &ctx->grp, ctx->point_format,
&ctx->grp.G,
&ctx->Xp1, &ctx->Xp2, ID_PEER,
@ -518,6 +534,11 @@ int mbedtls_ecjpake_write_round_one( mbedtls_ecjpake_context *ctx,
int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng )
{
ECJPAKE_VALIDATE_RET( ctx != NULL );
ECJPAKE_VALIDATE_RET( buf != NULL );
ECJPAKE_VALIDATE_RET( olen != NULL );
ECJPAKE_VALIDATE_RET( f_rng != NULL );
return( ecjpake_kkpp_write( ctx->md_info, &ctx->grp, ctx->point_format,
&ctx->grp.G,
&ctx->xm1, &ctx->Xm1, &ctx->xm2, &ctx->Xm2,
@ -560,6 +581,9 @@ int mbedtls_ecjpake_read_round_two( mbedtls_ecjpake_context *ctx,
mbedtls_ecp_group grp;
mbedtls_ecp_point G; /* C: GB, S: GA */
ECJPAKE_VALIDATE_RET( ctx != NULL );
ECJPAKE_VALIDATE_RET( buf != NULL );
mbedtls_ecp_group_init( &grp );
mbedtls_ecp_point_init( &G );
@ -652,6 +676,11 @@ int mbedtls_ecjpake_write_round_two( mbedtls_ecjpake_context *ctx,
const unsigned char *end = buf + len;
size_t ec_len;
ECJPAKE_VALIDATE_RET( ctx != NULL );
ECJPAKE_VALIDATE_RET( buf != NULL );
ECJPAKE_VALIDATE_RET( olen != NULL );
ECJPAKE_VALIDATE_RET( f_rng != NULL );
mbedtls_ecp_point_init( &G );
mbedtls_ecp_point_init( &Xm );
mbedtls_mpi_init( &xm );
@ -727,6 +756,11 @@ int mbedtls_ecjpake_derive_secret( mbedtls_ecjpake_context *ctx,
unsigned char kx[MBEDTLS_ECP_MAX_BYTES];
size_t x_bytes;
ECJPAKE_VALIDATE_RET( ctx != NULL );
ECJPAKE_VALIDATE_RET( buf != NULL );
ECJPAKE_VALIDATE_RET( olen != NULL );
ECJPAKE_VALIDATE_RET( f_rng != NULL );
*olen = mbedtls_md_get_size( ctx->md_info );
if( len < *olen )
return( MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL );

3
tests/suites/test_suite_ecjpake.data
View File

@ -1,3 +1,6 @@
ECJPAKE parameter validation
ecjpake_invalid_param:
ECJPAKE selftest
ecjpake_selftest:

131
tests/suites/test_suite_ecjpake.function
View File

@ -98,6 +98,137 @@ cleanup:
* END_DEPENDENCIES
*/
/* BEGIN_CASE depends_on:MBEDTLS_CHECK_PARAMS:!MBEDTLS_PARAM_FAILED_ALT */
void ecjpake_invalid_param( )
{
mbedtls_ecjpake_context ctx;
unsigned char buf[42] = { 0 };
size_t olen;
size_t const len = sizeof( buf );
mbedtls_ecjpake_role valid_role = MBEDTLS_ECJPAKE_SERVER;
mbedtls_ecjpake_role invalid_role = (mbedtls_ecjpake_role) 42;
mbedtls_md_type_t valid_md = MBEDTLS_MD_SHA256;
mbedtls_ecp_group_id valid_group = MBEDTLS_ECP_DP_SECP256R1;
TEST_INVALID_PARAM( mbedtls_ecjpake_init( NULL ) );
TEST_VALID_PARAM( mbedtls_ecjpake_free( NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_setup( NULL,
valid_role,
valid_md,
valid_group,
buf, len ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_setup( &ctx,
invalid_role,
valid_md,
valid_group,
buf, len ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_setup( &ctx,
valid_role,
valid_md,
valid_group,
NULL, len ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_check( NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_write_round_one( NULL,
buf, len,
&olen,
rnd_std_rand,
NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_write_round_one( &ctx,
NULL, len,
&olen,
rnd_std_rand,
NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_write_round_one( &ctx,
buf, len,
NULL,
rnd_std_rand,
NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_write_round_one( &ctx,
buf, len,
&olen,
NULL,
NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_write_round_two( NULL,
buf, len,
&olen,
rnd_std_rand,
NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_write_round_two( &ctx,
NULL, len,
&olen,
rnd_std_rand,
NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_write_round_two( &ctx,
buf, len,
NULL,
rnd_std_rand,
NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_write_round_two( &ctx,
buf, len,
&olen,
NULL,
NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_read_round_one( NULL,
buf, len ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_read_round_one( &ctx,
NULL, len ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_read_round_two( NULL,
buf, len ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_read_round_two( &ctx,
NULL, len ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_derive_secret( NULL,
buf, len,
&olen,
rnd_std_rand,
NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_derive_secret( &ctx,
NULL, len,
&olen,
rnd_std_rand,
NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_derive_secret( &ctx,
buf, len,
NULL,
rnd_std_rand,
NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
mbedtls_ecjpake_derive_secret( &ctx,
buf, len,
&olen,
NULL,
NULL ) );
exit:
return;
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST */
void ecjpake_selftest( )
{