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SSL asynchronous private key operation callbacks: test server

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New options in ssl_server2 to use the asynchronous private key
operation feature.

Features: resume delay to call resume more than once; error injection
at each stage; renegotiation support.
This commit is contained in:
Gilles Peskine 2018-01-05 21:15:57 +01:00
parent 8bf79f6dc6
commit 9eb5e9a16e
1 changed files with 248 additions and 11 deletions
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259
programs/ssl/ssl_server2.c
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@ -108,6 +108,9 @@ int main( void )
#define DFL_KEY_FILE ""
#define DFL_CRT_FILE2 ""
#define DFL_KEY_FILE2 ""
#define DFL_ASYNC_PRIVATE_DELAY1 ( -1 )
#define DFL_ASYNC_PRIVATE_DELAY2 ( -1 )
#define DFL_ASYNC_PRIVATE_ERROR ( -1 )
#define DFL_PSK ""
#define DFL_PSK_IDENTITY "Client_identity"
#define DFL_ECJPAKE_PW NULL
@ -195,6 +198,16 @@ int main( void )
#define USAGE_IO ""
#endif /* MBEDTLS_X509_CRT_PARSE_C */
#if defined(MBEDTLS_SSL_ASYNC_PRIVATE_C)
#define USAGE_SSL_ASYNC \
" async_private_delay1=%%d Asynchronous delay for key_file or preloaded key\n" \
" async_private_delay2=%%d Asynchronous delay for key_file2\n" \
" default: -1 (not asynchronous)\n" \
" async_private_error=%%d Async callback error injection (default=0=none, 1=start, 2=cancel, 3=resume, 4=pk)"
#else
#define USAGE_SSL_ASYNC ""
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE_C */
#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
#define USAGE_PSK \
" psk=%%s default: \"\" (in hex, without 0x)\n" \
@ -343,6 +356,7 @@ int main( void )
" cert_req_ca_list=%%d default: 1 (send ca list)\n" \
" options: 1 (send ca list), 0 (don't send)\n" \
USAGE_IO \
USAGE_SSL_ASYNC \
USAGE_SNI \
"\n" \
USAGE_PSK \
@ -406,6 +420,9 @@ struct options
const char *key_file; /* the file with the server key */
const char *crt_file2; /* the file with the 2nd server certificate */
const char *key_file2; /* the file with the 2nd server key */
int async_private_delay1; /* number of times f_async_resume needs to be called for key 1, or -1 for no async */
int async_private_delay2; /* number of times f_async_resume needs to be called for key 2, or -1 for no async */
int async_private_error; /* inject error in async private callback */
const char *psk; /* the pre-shared key */
const char *psk_identity; /* the pre-shared key identity */
char *psk_list; /* list of PSK id/key pairs for callback */
@ -837,6 +854,150 @@ static int ssl_sig_hashes_for_test[] = {
};
#endif /* MBEDTLS_X509_CRT_PARSE_C */
#if defined(MBEDTLS_SSL_ASYNC_PRIVATE_C)
typedef struct
{
mbedtls_x509_crt *cert;
mbedtls_pk_context *pk;
unsigned delay;
} ssl_async_key_slot_t;
typedef enum {
SSL_ASYNC_INJECT_ERROR_NONE = 0,
SSL_ASYNC_INJECT_ERROR_START,
SSL_ASYNC_INJECT_ERROR_CANCEL,
SSL_ASYNC_INJECT_ERROR_RESUME,
SSL_ASYNC_INJECT_ERROR_PK
#define SSL_ASYNC_INJECT_ERROR_MAX SSL_ASYNC_INJECT_ERROR_PK
} ssl_async_inject_error_t;
typedef struct
{
ssl_async_key_slot_t slots[2];
size_t slots_used;
ssl_async_inject_error_t inject_error;
int (*f_rng)(void *, unsigned char *, size_t);
void *p_rng;
} ssl_async_key_context_t;
void ssl_async_set_key( ssl_async_key_context_t *ctx,
mbedtls_x509_crt *cert,
mbedtls_pk_context *pk,
unsigned delay )
{
ctx->slots[ctx->slots_used].cert = cert;
ctx->slots[ctx->slots_used].pk = pk;
ctx->slots[ctx->slots_used].delay = delay;
++ctx->slots_used;
}
typedef struct
{
size_t slot;
mbedtls_md_type_t md_alg;
unsigned char hash[MBEDTLS_MD_MAX_SIZE];
size_t hash_len;
unsigned delay;
} ssl_async_operation_context_t;
int ssl_async_sign( void *connection_ctx_arg,
void **p_operation_ctx,
mbedtls_x509_crt *cert,
mbedtls_md_type_t md_alg,
const unsigned char *hash,
size_t hash_len )
{
ssl_async_key_context_t *key_ctx = connection_ctx_arg;
size_t slot;
ssl_async_operation_context_t *ctx = NULL;
{
char dn[100];
mbedtls_x509_dn_gets( dn, sizeof( dn ), &cert->subject );
mbedtls_printf( "Async sign callback: looking for DN=%s\n", dn );
}
for( slot = 0; slot < key_ctx->slots_used; slot++ )
{
if( key_ctx->slots[slot].cert == cert )
break;
}
if( slot == key_ctx->slots_used )
{
mbedtls_printf( "Async sign callback: no key matches this certificate.\n" );
return( MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH );
}
mbedtls_printf( "Async sign callback: using key slot %zd, delay=%u.\n",
slot, key_ctx->slots[slot].delay );
if( key_ctx->inject_error == SSL_ASYNC_INJECT_ERROR_START )
{
mbedtls_printf( "Async sign callback: injected error\n" );
return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
}
if( hash_len > MBEDTLS_MD_MAX_SIZE )
return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
ctx = mbedtls_calloc( 1, sizeof( *ctx ) );
if( ctx == NULL )
return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
ctx->slot = slot;
ctx->md_alg = md_alg;
memcpy( ctx->hash, hash, hash_len );
ctx->hash_len = hash_len;
ctx->delay = key_ctx->slots[slot].delay;
*p_operation_ctx = ctx;
if( ctx->delay == 0 )
return( 0 );
else
return( MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS );
}
int ssl_async_resume( void *connection_ctx_arg,
void *operation_ctx_arg,
unsigned char *output,
size_t *output_len,
size_t output_size )
{
ssl_async_operation_context_t *ctx = operation_ctx_arg;
ssl_async_key_context_t *connection_ctx = connection_ctx_arg;
ssl_async_key_slot_t *key_slot = &connection_ctx->slots[ctx->slot];
int ret;
if( connection_ctx->inject_error == SSL_ASYNC_INJECT_ERROR_RESUME )
{
mbedtls_printf( "Async resume callback: injected error\n" );
return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
}
if( ctx->delay > 0 )
{
--ctx->delay;
mbedtls_printf( "Async resume (slot %zd): call %u more times.\n",
ctx->slot, ctx->delay );
return( MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS );
}
(void) output_size; /* mbedtls_pk_size lacks this parameter */
ret = mbedtls_pk_sign( key_slot->pk,
ctx->md_alg,
ctx->hash, ctx->hash_len,
output, output_len,
connection_ctx->f_rng, connection_ctx->p_rng );
if( connection_ctx->inject_error == SSL_ASYNC_INJECT_ERROR_PK )
{
mbedtls_printf( "Async resume callback: done but injected error\n" );
return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
}
mbedtls_printf( "Async resume (slot %zd): done, status=%d.\n",
ctx->slot, ret );
mbedtls_free( ctx );
return( ret );
}
void ssl_async_cancel( void *connection_ctx_arg,
void *operation_ctx_arg )
{
ssl_async_operation_context_t *ctx = operation_ctx_arg;
(void) connection_ctx_arg;
mbedtls_printf( "Async cancel callback.\n" );
mbedtls_free( ctx );
}
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE_C */
int main( int argc, char *argv[] )
{
int ret = 0, len, written, frags, exchanges_left;
@ -875,7 +1036,10 @@ int main( int argc, char *argv[] )
mbedtls_x509_crt srvcert2;
mbedtls_pk_context pkey2;
int key_cert_init = 0, key_cert_init2 = 0;
#endif
#if defined(MBEDTLS_SSL_ASYNC_PRIVATE_C)
ssl_async_key_context_t ssl_async_keys;
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE_C */
#endif /* MBEDTLS_X509_CRT_PARSE_C */
#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_FS_IO)
mbedtls_dhm_context dhm;
#endif
@ -977,6 +1141,9 @@ int main( int argc, char *argv[] )
opt.key_file = DFL_KEY_FILE;
opt.crt_file2 = DFL_CRT_FILE2;
opt.key_file2 = DFL_KEY_FILE2;
opt.async_private_delay1 = DFL_ASYNC_PRIVATE_DELAY1;
opt.async_private_delay2 = DFL_ASYNC_PRIVATE_DELAY2;
opt.async_private_error = DFL_ASYNC_PRIVATE_ERROR;
opt.psk = DFL_PSK;
opt.psk_identity = DFL_PSK_IDENTITY;
opt.psk_list = DFL_PSK_LIST;
@ -1063,6 +1230,22 @@ int main( int argc, char *argv[] )
opt.key_file2 = q;
else if( strcmp( p, "dhm_file" ) == 0 )
opt.dhm_file = q;
#if defined(MBEDTLS_SSL_ASYNC_PRIVATE_C)
else if( strcmp( p, "async_private_delay1" ) == 0 )
opt.async_private_delay1 = atoi( q );
else if( strcmp( p, "async_private_delay2" ) == 0 )
opt.async_private_delay2 = atoi( q );
else if( strcmp( p, "async_private_error" ) == 0 )
{
int n = atoi( q );
if( n < 0 || n > SSL_ASYNC_INJECT_ERROR_MAX )
{
ret = 2;
goto usage;
}
opt.async_private_error = n;
}
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE_C */
else if( strcmp( p, "psk" ) == 0 )
opt.psk = q;
else if( strcmp( p, "psk_identity" ) == 0 )
@ -1932,18 +2115,55 @@ int main( int argc, char *argv[] )
mbedtls_ssl_conf_ca_chain( &conf, &cacert, NULL );
}
if( key_cert_init )
if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &srvcert, &pkey ) ) != 0 )
{
mbedtls_pk_context *pk = &pkey;
#if defined(MBEDTLS_SSL_ASYNC_PRIVATE_C)
if( opt.async_private_delay1 >= 0 )
{
ssl_async_set_key( &ssl_async_keys, &srvcert, pk,
opt.async_private_delay1 );
pk = NULL;
}
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE_C */
if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &srvcert, pk ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret );
goto exit;
}
}
if( key_cert_init2 )
if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &srvcert2, &pkey2 ) ) != 0 )
{
mbedtls_pk_context *pk = &pkey2;
#if defined(MBEDTLS_SSL_ASYNC_PRIVATE_C)
if( opt.async_private_delay2 >= 0 )
{
ssl_async_set_key( &ssl_async_keys, &srvcert2, pk,
opt.async_private_delay2 );
pk = NULL;
}
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE_C */
if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &srvcert2, pk ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret );
goto exit;
}
#endif
}
#if defined(MBEDTLS_SSL_ASYNC_PRIVATE_C)
if( opt.async_private_delay1 >= 0 || opt.async_private_delay2 >= 0 )
{
ssl_async_keys.inject_error = opt.async_private_error;
ssl_async_keys.f_rng = mbedtls_ctr_drbg_random;
ssl_async_keys.p_rng = &ctr_drbg;
mbedtls_ssl_conf_async_private_cb( &conf,
ssl_async_sign,
NULL,
ssl_async_resume,
ssl_async_cancel,
&ssl_async_keys );
}
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE_C */
#endif /* MBEDTLS_X509_CRT_PARSE_C */
#if defined(SNI_OPTION)
if( opt.sni != NULL )
@ -2113,9 +2333,21 @@ handshake:
mbedtls_printf( " . Performing the SSL/TLS handshake..." );
fflush( stdout );
do ret = mbedtls_ssl_handshake( &ssl );
do
{
ret = mbedtls_ssl_handshake( &ssl );
#if defined(MBEDTLS_SSL_ASYNC_PRIVATE_C)
if( ret == MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS &&
opt.async_private_error == SSL_ASYNC_INJECT_ERROR_CANCEL )
{
mbedtls_printf( " cancelling on injected error\n" );
goto reset;
}
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE_C */
}
while( ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE );
ret == MBEDTLS_ERR_SSL_WANT_WRITE ||
ret == MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS );
if( ret == MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED )
{
@ -2220,7 +2452,8 @@ data_exchange:
ret = mbedtls_ssl_read( &ssl, buf, len );
if( ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE )
ret == MBEDTLS_ERR_SSL_WANT_WRITE ||
ret == MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS )
continue;
if( ret <= 0 )
@ -2311,7 +2544,8 @@ data_exchange:
do ret = mbedtls_ssl_read( &ssl, buf, len );
while( ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE );
ret == MBEDTLS_ERR_SSL_WANT_WRITE ||
ret == MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS );
if( ret <= 0 )
{
@ -2347,7 +2581,8 @@ data_exchange:
while( ( ret = mbedtls_ssl_renegotiate( &ssl ) ) != 0 )
{
if( ret != MBEDTLS_ERR_SSL_WANT_READ &&
ret != MBEDTLS_ERR_SSL_WANT_WRITE )
ret != MBEDTLS_ERR_SSL_WANT_WRITE &&
ret != MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_renegotiate returned %d\n\n", ret );
goto reset;
@ -2381,7 +2616,8 @@ data_exchange:
}
if( ret != MBEDTLS_ERR_SSL_WANT_READ &&
ret != MBEDTLS_ERR_SSL_WANT_WRITE )
ret != MBEDTLS_ERR_SSL_WANT_WRITE &&
ret != MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_write returned %d\n\n", ret );
goto reset;
@ -2393,7 +2629,8 @@ data_exchange:
{
do ret = mbedtls_ssl_write( &ssl, buf, len );
while( ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE );
ret == MBEDTLS_ERR_SSL_WANT_WRITE ||
ret == MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS );
if( ret < 0 )
{