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Add opaque context to mbedtls_x509_crt_ext_cb_t

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Signed-off-by: Nicola Di Lieto <nicola.dilieto@gmail.com>
This commit is contained in:
Nicola Di Lieto 2020-05-28 23:41:38 +02:00
parent 17bb60c0f1
commit 5659e7e889
3 changed files with 27 additions and 18 deletions
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8
include/mbedtls/x509_crt.h
View File

@ -310,6 +310,7 @@ int mbedtls_x509_crt_parse_der( mbedtls_x509_crt *chain,
* mbedtls_x509_crt_parse_der_with_ext_cb() routine when * mbedtls_x509_crt_parse_der_with_ext_cb() routine when
* it encounters an unsupported extension. * it encounters an unsupported extension.
* *
* \param p_ctx An opaque context passed to the callback.
* \param crt The certificate being parsed. * \param crt The certificate being parsed.
* \param oid The OID of the extension. * \param oid The OID of the extension.
* \param critical Whether the extension is critical. * \param critical Whether the extension is critical.
@ -323,7 +324,8 @@ int mbedtls_x509_crt_parse_der( mbedtls_x509_crt *chain,
* \return \c 0 on success. * \return \c 0 on success.
* \return A negative error code on failure. * \return A negative error code on failure.
*/ */
typedef int (*mbedtls_x509_crt_ext_cb_t)( mbedtls_x509_crt const *crt, typedef int (*mbedtls_x509_crt_ext_cb_t)( void *p_ctx,
mbedtls_x509_crt const *crt,
mbedtls_x509_buf const *oid, mbedtls_x509_buf const *oid,
int critical, int critical,
const unsigned char *p, const unsigned char *p,
@ -347,6 +349,7 @@ typedef int (*mbedtls_x509_crt_ext_cb_t)( mbedtls_x509_crt const *crt,
* is destroyed (like mbedtls_x509_crt_parse_der_nocopy()) * is destroyed (like mbedtls_x509_crt_parse_der_nocopy())
* \param cb A callback invoked for every unsupported certificate * \param cb A callback invoked for every unsupported certificate
* extension. * extension.
* \param p_ctx An opaque context passed to the callback.
* *
* \note This call is functionally equivalent to * \note This call is functionally equivalent to
* mbedtls_x509_crt_parse_der(), and/or * mbedtls_x509_crt_parse_der(), and/or
@ -363,7 +366,8 @@ int mbedtls_x509_crt_parse_der_with_ext_cb( mbedtls_x509_crt *chain,
const unsigned char *buf, const unsigned char *buf,
size_t buflen, size_t buflen,
int make_copy, int make_copy,
mbedtls_x509_crt_ext_cb_t cb ); mbedtls_x509_crt_ext_cb_t cb,
void *p_ctx );
/** /**
* \brief Parse a single DER formatted certificate and add it * \brief Parse a single DER formatted certificate and add it

24
library/x509_crt.c
View File

@ -893,7 +893,8 @@ static int x509_get_certificate_policies( unsigned char **p,
static int x509_get_crt_ext( unsigned char **p, static int x509_get_crt_ext( unsigned char **p,
const unsigned char *end, const unsigned char *end,
mbedtls_x509_crt *crt, mbedtls_x509_crt *crt,
mbedtls_x509_crt_ext_cb_t cb ) mbedtls_x509_crt_ext_cb_t cb,
void *p_ctx )
{ {
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
size_t len; size_t len;
@ -959,7 +960,7 @@ static int x509_get_crt_ext( unsigned char **p,
/* Give the callback (if any) a chance to handle the extension */ /* Give the callback (if any) a chance to handle the extension */
if( cb != NULL ) if( cb != NULL )
{ {
ret = cb( crt, &extn_oid, is_critical, *p, end_ext_octet ); ret = cb( p_ctx, crt, &extn_oid, is_critical, *p, end_ext_octet );
if( ret != 0 ) if( ret != 0 )
return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret ); return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
*p = end_ext_octet; *p = end_ext_octet;
@ -1073,7 +1074,8 @@ static int x509_crt_parse_der_core( mbedtls_x509_crt *crt,
const unsigned char *buf, const unsigned char *buf,
size_t buflen, size_t buflen,
int make_copy, int make_copy,
mbedtls_x509_crt_ext_cb_t cb ) mbedtls_x509_crt_ext_cb_t cb,
void *p_ctx )
{ {
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
size_t len; size_t len;
@ -1272,7 +1274,7 @@ static int x509_crt_parse_der_core( mbedtls_x509_crt *crt,
if( crt->version == 3 ) if( crt->version == 3 )
#endif #endif
{ {
ret = x509_get_crt_ext( &p, end, crt, cb ); ret = x509_get_crt_ext( &p, end, crt, cb, p_ctx );
if( ret != 0 ) if( ret != 0 )
{ {
mbedtls_x509_crt_free( crt ); mbedtls_x509_crt_free( crt );
@ -1336,7 +1338,8 @@ static int mbedtls_x509_crt_parse_der_internal( mbedtls_x509_crt *chain,
const unsigned char *buf, const unsigned char *buf,
size_t buflen, size_t buflen,
int make_copy, int make_copy,
mbedtls_x509_crt_ext_cb_t cb ) mbedtls_x509_crt_ext_cb_t cb,
void *p_ctx )
{ {
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
mbedtls_x509_crt *crt = chain, *prev = NULL; mbedtls_x509_crt *crt = chain, *prev = NULL;
@ -1368,7 +1371,7 @@ static int mbedtls_x509_crt_parse_der_internal( mbedtls_x509_crt *chain,
crt = crt->next; crt = crt->next;
} }
ret = x509_crt_parse_der_core( crt, buf, buflen, make_copy, cb ); ret = x509_crt_parse_der_core( crt, buf, buflen, make_copy, cb, p_ctx );
if( ret != 0 ) if( ret != 0 )
{ {
if( prev ) if( prev )
@ -1387,23 +1390,24 @@ int mbedtls_x509_crt_parse_der_nocopy( mbedtls_x509_crt *chain,
const unsigned char *buf, const unsigned char *buf,
size_t buflen ) size_t buflen )
{ {
return( mbedtls_x509_crt_parse_der_internal( chain, buf, buflen, 0, NULL ) ); return( mbedtls_x509_crt_parse_der_internal( chain, buf, buflen, 0, NULL, NULL ) );
} }
int mbedtls_x509_crt_parse_der_with_ext_cb( mbedtls_x509_crt *chain, int mbedtls_x509_crt_parse_der_with_ext_cb( mbedtls_x509_crt *chain,
const unsigned char *buf, const unsigned char *buf,
size_t buflen, size_t buflen,
int make_copy, int make_copy,
mbedtls_x509_crt_ext_cb_t cb ) mbedtls_x509_crt_ext_cb_t cb,
void *p_ctx )
{ {
return( mbedtls_x509_crt_parse_der_internal( chain, buf, buflen, make_copy, cb ) ); return( mbedtls_x509_crt_parse_der_internal( chain, buf, buflen, make_copy, cb, p_ctx ) );
} }
int mbedtls_x509_crt_parse_der( mbedtls_x509_crt *chain, int mbedtls_x509_crt_parse_der( mbedtls_x509_crt *chain,
const unsigned char *buf, const unsigned char *buf,
size_t buflen ) size_t buflen )
{ {
return( mbedtls_x509_crt_parse_der_internal( chain, buf, buflen, 1, NULL ) ); return( mbedtls_x509_crt_parse_der_internal( chain, buf, buflen, 1, NULL, NULL ) );
} }
/* /*

13
tests/suites/test_suite_x509parse.function
View File

@ -302,9 +302,10 @@ int verify_parse_san( mbedtls_x509_subject_alternative_name *san,
return( 0 ); return( 0 );
} }
int parse_crt_ext_cb( mbedtls_x509_crt const *crt, mbedtls_x509_buf const *oid, int critical, int parse_crt_ext_cb( void *p_ctx, mbedtls_x509_crt const *crt, mbedtls_x509_buf const *oid,
const unsigned char *p, const unsigned char *end ) int critical, const unsigned char *p, const unsigned char *end )
{ {
( void ) p_ctx;
( void ) crt; ( void ) crt;
( void ) p; ( void ) p;
( void ) end; ( void ) end;
@ -786,7 +787,7 @@ void x509parse_crt( data_t * buf, char * result_str, int result )
mbedtls_x509_crt_init( &crt ); mbedtls_x509_crt_init( &crt );
memset( output, 0, 2000 ); memset( output, 0, 2000 );
TEST_ASSERT( mbedtls_x509_crt_parse_der_with_ext_cb( &crt, buf->x, buf->len, 0, NULL ) == ( result ) ); TEST_ASSERT( mbedtls_x509_crt_parse_der_with_ext_cb( &crt, buf->x, buf->len, 0, NULL, NULL ) == ( result ) );
if( ( result ) == 0 ) if( ( result ) == 0 )
{ {
res = mbedtls_x509_crt_info( (char *) output, 2000, "", &crt ); res = mbedtls_x509_crt_info( (char *) output, 2000, "", &crt );
@ -801,7 +802,7 @@ void x509parse_crt( data_t * buf, char * result_str, int result )
mbedtls_x509_crt_init( &crt ); mbedtls_x509_crt_init( &crt );
memset( output, 0, 2000 ); memset( output, 0, 2000 );
TEST_ASSERT( mbedtls_x509_crt_parse_der_with_ext_cb( &crt, buf->x, buf->len, 1, NULL ) == ( result ) ); TEST_ASSERT( mbedtls_x509_crt_parse_der_with_ext_cb( &crt, buf->x, buf->len, 1, NULL, NULL ) == ( result ) );
if( ( result ) == 0 ) if( ( result ) == 0 )
{ {
res = mbedtls_x509_crt_info( (char *) output, 2000, "", &crt ); res = mbedtls_x509_crt_info( (char *) output, 2000, "", &crt );
@ -827,7 +828,7 @@ void x509parse_crt_cb( data_t * buf, char * result_str, int result )
mbedtls_x509_crt_init( &crt ); mbedtls_x509_crt_init( &crt );
memset( output, 0, 2000 ); memset( output, 0, 2000 );
TEST_ASSERT( mbedtls_x509_crt_parse_der_with_ext_cb( &crt, buf->x, buf->len, 0, parse_crt_ext_cb ) == ( result ) ); TEST_ASSERT( mbedtls_x509_crt_parse_der_with_ext_cb( &crt, buf->x, buf->len, 0, parse_crt_ext_cb, NULL ) == ( result ) );
if( ( result ) == 0 ) if( ( result ) == 0 )
{ {
res = mbedtls_x509_crt_info( (char *) output, 2000, "", &crt ); res = mbedtls_x509_crt_info( (char *) output, 2000, "", &crt );
@ -842,7 +843,7 @@ void x509parse_crt_cb( data_t * buf, char * result_str, int result )
mbedtls_x509_crt_init( &crt ); mbedtls_x509_crt_init( &crt );
memset( output, 0, 2000 ); memset( output, 0, 2000 );
TEST_ASSERT( mbedtls_x509_crt_parse_der_with_ext_cb( &crt, buf->x, buf->len, 1, parse_crt_ext_cb ) == ( result ) ); TEST_ASSERT( mbedtls_x509_crt_parse_der_with_ext_cb( &crt, buf->x, buf->len, 1, parse_crt_ext_cb, NULL ) == ( result ) );
if( ( result ) == 0 ) if( ( result ) == 0 )
{ {
res = mbedtls_x509_crt_info( (char *) output, 2000, "", &crt ); res = mbedtls_x509_crt_info( (char *) output, 2000, "", &crt );