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Adapt function signatures to rs_ctx + ret

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Manuel Pégourié-Gonnard 2017-07-17 10:26:19 +02:00
parent be4ff42fe4
commit a4a5d1dbe6
1 changed files with 105 additions and 42 deletions
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133
library/x509_crt.c
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@ -1866,7 +1866,8 @@ static int x509_name_cmp( const mbedtls_x509_name *a, const mbedtls_x509_name *b
* Check the signature of a certificate by its parent * Check the signature of a certificate by its parent
*/ */
static int x509_crt_check_signature( const mbedtls_x509_crt *child, static int x509_crt_check_signature( const mbedtls_x509_crt *child,
mbedtls_x509_crt *parent ) mbedtls_x509_crt *parent,
mbedtls_x509_crt_restart_ctx *rs_ctx )
{ {
const mbedtls_md_info_t *md_info; const mbedtls_md_info_t *md_info;
unsigned char hash[MBEDTLS_MD_MAX_SIZE]; unsigned char hash[MBEDTLS_MD_MAX_SIZE];
@ -1878,14 +1879,24 @@ static int x509_crt_check_signature( const mbedtls_x509_crt *child,
return( -1 ); return( -1 );
} }
if( mbedtls_pk_verify_ext( child->sig_pk, child->sig_opts, &parent->pk, /* Skip expensive computation on obvious mismatch */
child->sig_md, hash, mbedtls_md_get_size( md_info ), if( ! mbedtls_pk_can_do( &parent->pk, child->sig_pk ) )
child->sig.p, child->sig.len ) != 0 )
{
return( -1 ); return( -1 );
}
return( 0 ); #if defined(MBEDTLS_ECP_RESTARTABLE)
if( rs_ctx != NULL && child->sig_pk == MBEDTLS_PK_ECDSA )
{
return( mbedtls_pk_verify_restartable( &parent->pk,
child->sig_md, hash, mbedtls_md_get_size( md_info ),
child->sig.p, child->sig.len, &rs_ctx->ecdsa ) );
}
#else
(void) rs_ctx;
#endif
return( mbedtls_pk_verify_ext( child->sig_pk, child->sig_opts, &parent->pk,
child->sig_md, hash, mbedtls_md_get_size( md_info ),
child->sig.p, child->sig.len ) );
} }
/* /*
@ -1952,17 +1963,19 @@ static int x509_crt_check_parent( const mbedtls_x509_crt *child,
* rely on key identifier extensions). (This is one way users might choose to * rely on key identifier extensions). (This is one way users might choose to
* handle key rollover, another relies on self-issued certs, see [SIRO].) * handle key rollover, another relies on self-issued certs, see [SIRO].)
*/ */
static mbedtls_x509_crt *x509_crt_find_parent_in( mbedtls_x509_crt *child, static int x509_crt_find_parent_in(
mbedtls_x509_crt *child,
mbedtls_x509_crt *candidates, mbedtls_x509_crt *candidates,
int *signature_is_good, mbedtls_x509_crt **r_parent,
int *r_signature_is_good,
int top, int top,
int path_cnt, int path_cnt,
int self_cnt ) int self_cnt,
mbedtls_x509_crt_restart_ctx *rs_ctx )
{ {
int ret;
mbedtls_x509_crt *parent, *fallback_parent = NULL; mbedtls_x509_crt *parent, *fallback_parent = NULL;
int fallback_sign_good = 0; int signature_is_good = 0, fallback_sign_good = 0;
*signature_is_good = 0;
for( parent = candidates; parent != NULL; parent = parent->next ) for( parent = candidates; parent != NULL; parent = parent->next )
{ {
@ -1978,8 +1991,17 @@ static mbedtls_x509_crt *x509_crt_find_parent_in( mbedtls_x509_crt *child,
} }
/* Signature */ /* Signature */
*signature_is_good = x509_crt_check_signature( child, parent ) == 0; ret = x509_crt_check_signature( child, parent, rs_ctx );
if( top && ! *signature_is_good )
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
if( ret == MBEDTLS_ERR_ECP_IN_PROGRESS ) {
// TODO: stave state
return( ret );
}
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
signature_is_good = ret == 0;
if( top && ! signature_is_good )
continue; continue;
/* optional time check */ /* optional time check */
@ -1989,7 +2011,7 @@ static mbedtls_x509_crt *x509_crt_find_parent_in( mbedtls_x509_crt *child,
if( fallback_parent == NULL ) if( fallback_parent == NULL )
{ {
fallback_parent = parent; fallback_parent = parent;
fallback_sign_good = *signature_is_good; fallback_sign_good = signature_is_good;
} }
continue; continue;
@ -1998,13 +2020,18 @@ static mbedtls_x509_crt *x509_crt_find_parent_in( mbedtls_x509_crt *child,
break; break;
} }
if( parent == NULL ) if( parent != NULL )
{ {
parent = fallback_parent; *r_parent = parent;
*signature_is_good = fallback_sign_good; *r_signature_is_good = signature_is_good;
}
else
{
*r_parent = fallback_parent;
*r_signature_is_good = fallback_sign_good;
} }
return parent; return( 0 );
} }
/* /*
@ -2013,27 +2040,48 @@ static mbedtls_x509_crt *x509_crt_find_parent_in( mbedtls_x509_crt *child,
* Searches in trusted CAs first, and return the first suitable parent found * Searches in trusted CAs first, and return the first suitable parent found
* (see find_parent_in() for definition of suitable). * (see find_parent_in() for definition of suitable).
*/ */
static mbedtls_x509_crt *x509_crt_find_parent( mbedtls_x509_crt *child, static int x509_crt_find_parent(
mbedtls_x509_crt *child,
mbedtls_x509_crt *trust_ca, mbedtls_x509_crt *trust_ca,
mbedtls_x509_crt **parent,
int *parent_is_trusted, int *parent_is_trusted,
int *signature_is_good, int *signature_is_good,
int path_cnt, int path_cnt,
int self_cnt ) int self_cnt,
mbedtls_x509_crt_restart_ctx *rs_ctx )
{ {
mbedtls_x509_crt *parent; int ret;
/* Look for a parent in trusted CAs */ /* Look for a parent in trusted CAs */
*parent_is_trusted = 1; *parent_is_trusted = 1;
parent = x509_crt_find_parent_in( child, trust_ca, signature_is_good, ret = x509_crt_find_parent_in( child, trust_ca,
1, path_cnt, self_cnt ); parent, signature_is_good,
1, path_cnt, self_cnt, rs_ctx );
if( parent != NULL ) #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
return parent; if( ret == MBEDTLS_ERR_ECP_IN_PROGRESS ) {
// TODO: stave state
return( ret );
}
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
if( *parent != NULL )
return( 0 );
/* Look for a parent upwards the chain */ /* Look for a parent upwards the chain */
*parent_is_trusted = 0; *parent_is_trusted = 0;
return( x509_crt_find_parent_in( child, child->next, signature_is_good, ret = x509_crt_find_parent_in( child, child->next,
0, path_cnt, self_cnt ) ); parent, signature_is_good,
0, path_cnt, self_cnt, rs_ctx );
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
if( ret == MBEDTLS_ERR_ECP_IN_PROGRESS ) {
// TODO: stave state
return( ret );
}
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
return( 0 );
} }
/* /*
@ -2109,8 +2157,10 @@ static int x509_crt_verify_chain(
mbedtls_x509_crl *ca_crl, mbedtls_x509_crl *ca_crl,
const mbedtls_x509_crt_profile *profile, const mbedtls_x509_crt_profile *profile,
x509_crt_verify_chain_item ver_chain[X509_MAX_VERIFY_CHAIN_SIZE], x509_crt_verify_chain_item ver_chain[X509_MAX_VERIFY_CHAIN_SIZE],
size_t *chain_len ) size_t *chain_len,
mbedtls_x509_crt_restart_ctx *rs_ctx )
{ {
int ret;
uint32_t *flags; uint32_t *flags;
mbedtls_x509_crt *child; mbedtls_x509_crt *child;
mbedtls_x509_crt *parent; mbedtls_x509_crt *parent;
@ -2154,9 +2204,16 @@ static int x509_crt_verify_chain(
} }
/* Look for a parent in trusted CAs or up the chain */ /* Look for a parent in trusted CAs or up the chain */
parent = x509_crt_find_parent( child, trust_ca, ret = x509_crt_find_parent( child, trust_ca, &parent,
&parent_is_trusted, &signature_is_good, &parent_is_trusted, &signature_is_good,
*chain_len - 1, self_cnt ); *chain_len - 1, self_cnt, rs_ctx );
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
if( ret == MBEDTLS_ERR_ECP_IN_PROGRESS ) {
// TODO: stave state
return( ret );
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
}
/* No parent? We're done here */ /* No parent? We're done here */
if( parent == NULL ) if( parent == NULL )
@ -2351,8 +2408,6 @@ int mbedtls_x509_crt_verify_restartable( mbedtls_x509_crt *crt,
size_t chain_len; size_t chain_len;
uint32_t *ee_flags = &ver_chain[0].flags; uint32_t *ee_flags = &ver_chain[0].flags;
(void) rs_ctx;
*flags = 0; *flags = 0;
memset( ver_chain, 0, sizeof( ver_chain ) ); memset( ver_chain, 0, sizeof( ver_chain ) );
chain_len = 0; chain_len = 0;
@ -2378,7 +2433,15 @@ int mbedtls_x509_crt_verify_restartable( mbedtls_x509_crt *crt,
/* Check the chain */ /* Check the chain */
ret = x509_crt_verify_chain( crt, trust_ca, ca_crl, profile, ret = x509_crt_verify_chain( crt, trust_ca, ca_crl, profile,
ver_chain, &chain_len ); ver_chain, &chain_len, rs_ctx );
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
if( ret == MBEDTLS_ERR_ECP_IN_PROGRESS ) {
// TODO: stave state
return( ret );
}
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
if( ret != 0 ) if( ret != 0 )
goto exit; goto exit;