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[crypto] Remove dynamically-allocated storage for certificate name

Browse Source 
iPXE currently allocates a copy the certificate's common name as a
string.  This string is used by the TLS and CMS code to check
certificate names against an expected name, and also appears in
debugging messages.

Provide a function x509_check_name() to centralise certificate name
checking (in preparation for adding subjectAlternativeName support),
and a function x509_name() to provide a name to be used in debugging
messages, and remove the dynamically allocated string.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2014-03-25 15:01:32 +00:00
parent 151e4d9bfa
commit 01fa7efa38
6 changed files with 143 additions and 108 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
src/crypto/cms.c
View File

@ -130,7 +130,7 @@ static int cms_parse_certificates ( struct cms_signature *sig,
}
cert = x509_last ( sig->certificates );
DBGC ( sig, "CMS %p found certificate %s\n",
sig, cert->subject.name );
sig, x509_name ( cert ) );
/* Move to next certificate */
asn1_skip_any ( &cursor );
@ -680,8 +680,7 @@ int cms_verify ( struct cms_signature *sig, userptr_t data, size_t len,
/* Verify using all signerInfos */
list_for_each_entry ( info, &sig->info, list ) {
cert = x509_first ( info->chain );
if ( name && ( ( cert->subject.name == NULL ) ||
( strcmp ( cert->subject.name, name ) != 0 ) ) )
if ( name && ( x509_check_name ( cert, name ) != 0 ) )
continue;
if ( ( rc = cms_verify_signer_info ( sig, info, data, len,
time, root ) ) != 0 )

89
src/crypto/ocsp.c
View File

@ -177,11 +177,11 @@ static int ocsp_request ( struct ocsp_check *ocsp ) {
asn1_wrap ( builder, ASN1_SEQUENCE ),
asn1_wrap ( builder, ASN1_SEQUENCE ) ) ) != 0 ) {
DBGC ( ocsp, "OCSP %p \"%s\" could not build request: %s\n",
ocsp, ocsp->cert->subject.name, strerror ( rc ) );
ocsp, x509_name ( ocsp->cert ), strerror ( rc ) );
return rc;
}
DBGC2 ( ocsp, "OCSP %p \"%s\" request is:\n",
ocsp, ocsp->cert->subject.name );
ocsp, x509_name ( ocsp->cert ) );
DBGC2_HDA ( ocsp, 0, builder->data, builder->len );
/* Parse certificate ID for comparison with response */
@ -192,7 +192,7 @@ static int ocsp_request ( struct ocsp_check *ocsp ) {
asn1_enter ( cert_id, ASN1_SEQUENCE ),
asn1_enter ( cert_id, ASN1_SEQUENCE ) ) ) != 0 ) {
DBGC ( ocsp, "OCSP %p \"%s\" could not locate certID: %s\n",
ocsp, ocsp->cert->subject.name, strerror ( rc ) );
ocsp, x509_name ( ocsp->cert ), strerror ( rc ) );
return rc;
}
@ -218,7 +218,7 @@ static int ocsp_uri_string ( struct ocsp_check *ocsp ) {
base_uri_string = ocsp->cert->extensions.auth_info.ocsp.uri;
if ( ! base_uri_string ) {
DBGC ( ocsp, "OCSP %p \"%s\" has no OCSP URI\n",
ocsp, ocsp->cert->subject.name );
ocsp, x509_name ( ocsp->cert ) );
rc = -ENOTTY;
goto err_no_uri;
}
@ -250,7 +250,7 @@ static int ocsp_uri_string ( struct ocsp_check *ocsp ) {
goto err_ocsp_uri;
}
DBGC2 ( ocsp, "OCSP %p \"%s\" URI is %s\n",
ocsp, ocsp->cert->subject.name, ocsp->uri_string );
ocsp, x509_name ( ocsp->cert ), ocsp->uri_string );
/* Success */
rc = 0;
@ -327,14 +327,14 @@ static int ocsp_parse_response_status ( struct ocsp_check *ocsp,
memcpy ( &cursor, raw, sizeof ( cursor ) );
if ( ( rc = asn1_enter ( &cursor, ASN1_ENUMERATED ) ) != 0 ) {
DBGC ( ocsp, "OCSP %p \"%s\" could not locate responseStatus: "
"%s\n", ocsp, ocsp->cert->subject.name, strerror ( rc ));
"%s\n", ocsp, x509_name ( ocsp->cert ), strerror ( rc ));
return rc;
}
/* Extract response status */
if ( cursor.len != sizeof ( status ) ) {
DBGC ( ocsp, "OCSP %p \"%s\" invalid status:\n",
ocsp, ocsp->cert->subject.name );
ocsp, x509_name ( ocsp->cert ) );
DBGC_HDA ( ocsp, 0, cursor.data, cursor.len );
return -EINVAL;
}
@ -343,7 +343,7 @@ static int ocsp_parse_response_status ( struct ocsp_check *ocsp,
/* Check response status */
if ( status != OCSP_STATUS_SUCCESSFUL ) {
DBGC ( ocsp, "OCSP %p \"%s\" response status %d\n",
ocsp, ocsp->cert->subject.name, status );
ocsp, x509_name ( ocsp->cert ), status );
return EPROTO_STATUS ( status );
}
@ -368,7 +368,7 @@ static int ocsp_parse_response_type ( struct ocsp_check *ocsp,
/* Check responseType is "basic" */
if ( asn1_compare ( &oid_basic_response_type_cursor, &cursor ) != 0 ) {
DBGC ( ocsp, "OCSP %p \"%s\" response type not supported:\n",
ocsp, ocsp->cert->subject.name );
ocsp, x509_name ( ocsp->cert ) );
DBGC_HDA ( ocsp, 0, cursor.data, cursor.len );
return -ENOTSUP_RESPONSE_TYPE;
}
@ -443,17 +443,17 @@ static int ocsp_parse_responder_id ( struct ocsp_check *ocsp,
switch ( type ) {
case ASN1_EXPLICIT_TAG ( 1 ) :
DBGC2 ( ocsp, "OCSP %p \"%s\" responder identified by name\n",
ocsp, ocsp->cert->subject.name );
ocsp, x509_name ( ocsp->cert ) );
responder->compare = ocsp_compare_responder_name;
return 0;
case ASN1_EXPLICIT_TAG ( 2 ) :
DBGC2 ( ocsp, "OCSP %p \"%s\" responder identified by key "
"hash\n", ocsp, ocsp->cert->subject.name );
"hash\n", ocsp, x509_name ( ocsp->cert ) );
responder->compare = ocsp_compare_responder_key_hash;
return 0;
default:
DBGC ( ocsp, "OCSP %p \"%s\" unsupported responder ID type "
"%d\n", ocsp, ocsp->cert->subject.name, type );
"%d\n", ocsp, x509_name ( ocsp->cert ), type );
return -ENOTSUP_RESPONDER_ID;
}
}
@ -474,7 +474,7 @@ static int ocsp_parse_cert_id ( struct ocsp_check *ocsp,
asn1_shrink_any ( &cursor );
if ( asn1_compare ( &cursor, &ocsp->request.cert_id ) != 0 ) {
DBGC ( ocsp, "OCSP %p \"%s\" certID mismatch:\n",
ocsp, ocsp->cert->subject.name );
ocsp, x509_name ( ocsp->cert ) );
DBGC_HDA ( ocsp, 0, ocsp->request.cert_id.data,
ocsp->request.cert_id.len );
DBGC_HDA ( ocsp, 0, cursor.data, cursor.len );
@ -512,7 +512,7 @@ static int ocsp_parse_responses ( struct ocsp_check *ocsp,
/* Check certStatus */
if ( asn1_type ( &cursor ) != ASN1_IMPLICIT_TAG ( 0 ) ) {
DBGC ( ocsp, "OCSP %p \"%s\" non-good certStatus:\n",
ocsp, ocsp->cert->subject.name );
ocsp, x509_name ( ocsp->cert ) );
DBGC_HDA ( ocsp, 0, cursor.data, cursor.len );
return -EACCES_CERT_STATUS;
}
@ -522,11 +522,11 @@ static int ocsp_parse_responses ( struct ocsp_check *ocsp,
if ( ( rc = asn1_generalized_time ( &cursor,
&response->this_update ) ) != 0 ) {
DBGC ( ocsp, "OCSP %p \"%s\" could not parse thisUpdate: %s\n",
ocsp, ocsp->cert->subject.name, strerror ( rc ) );
ocsp, x509_name ( ocsp->cert ), strerror ( rc ) );
return rc;
}
DBGC2 ( ocsp, "OCSP %p \"%s\" this update was at time %lld\n",
ocsp, ocsp->cert->subject.name, response->this_update );
ocsp, x509_name ( ocsp->cert ), response->this_update );
asn1_skip_any ( &cursor );
/* Parse nextUpdate, if present */
@ -536,11 +536,11 @@ static int ocsp_parse_responses ( struct ocsp_check *ocsp,
&response->next_update ) ) != 0 ) {
DBGC ( ocsp, "OCSP %p \"%s\" could not parse "
"nextUpdate: %s\n", ocsp,
ocsp->cert->subject.name, strerror ( rc ) );
x509_name ( ocsp->cert ), strerror ( rc ) );
return rc;
}
DBGC2 ( ocsp, "OCSP %p \"%s\" next update is at time %lld\n",
ocsp, ocsp->cert->subject.name, response->next_update );
ocsp, x509_name ( ocsp->cert ), response->next_update );
} else {
/* If no nextUpdate is present, this indicates that
* "newer revocation information is available all the
@ -550,7 +550,7 @@ static int ocsp_parse_responses ( struct ocsp_check *ocsp,
* time and it would still be valid.
*/
DBGC ( ocsp, "OCSP %p \"%s\" responder is a moron\n",
ocsp, ocsp->cert->subject.name );
ocsp, x509_name ( ocsp->cert ) );
response->next_update = time ( NULL );
}
@ -630,7 +630,7 @@ static int ocsp_parse_certs ( struct ocsp_check *ocsp,
&cert ) ) != 0 ) {
DBGC ( ocsp, "OCSP %p \"%s\" could not parse "
"certificate: %s\n", ocsp,
ocsp->cert->subject.name, strerror ( rc ) );
x509_name ( ocsp->cert ), strerror ( rc ) );
DBGC_HDA ( ocsp, 0, cursor.data, cursor.len );
return rc;
}
@ -638,9 +638,10 @@ static int ocsp_parse_certs ( struct ocsp_check *ocsp,
/* Use if this certificate matches the responder ID */
if ( response->responder.compare ( ocsp, cert ) == 0 ) {
response->signer = cert;
DBGC2 ( ocsp, "OCSP %p \"%s\" response is signed by "
"\"%s\"\n", ocsp, ocsp->cert->subject.name,
response->signer->subject.name );
DBGC2 ( ocsp, "OCSP %p \"%s\" response is signed by ",
ocsp, x509_name ( ocsp->cert ) );
DBGC2 ( ocsp, "\"%s\"\n",
x509_name ( response->signer ) );
return 0;
}
@ -650,7 +651,7 @@ static int ocsp_parse_certs ( struct ocsp_check *ocsp,
}
DBGC ( ocsp, "OCSP %p \"%s\" missing responder certificate\n",
ocsp, ocsp->cert->subject.name );
ocsp, x509_name ( ocsp->cert ) );
return -EACCES_NO_RESPONDER;
}
@ -682,17 +683,17 @@ static int ocsp_parse_basic_response ( struct ocsp_check *ocsp,
if ( ( rc = asn1_signature_algorithm ( &cursor, algorithm ) ) != 0 ) {
DBGC ( ocsp, "OCSP %p \"%s\" cannot parse signature "
"algorithm: %s\n",
ocsp, ocsp->cert->subject.name, strerror ( rc ) );
ocsp, x509_name ( ocsp->cert ), strerror ( rc ) );
return rc;
}
DBGC2 ( ocsp, "OCSP %p \"%s\" signature algorithm is %s\n",
ocsp, ocsp->cert->subject.name, (*algorithm)->name );
ocsp, x509_name ( ocsp->cert ), (*algorithm)->name );
asn1_skip_any ( &cursor );
/* Parse signature */
if ( ( rc = asn1_integral_bit_string ( &cursor, signature ) ) != 0 ) {
DBGC ( ocsp, "OCSP %p \"%s\" cannot parse signature: %s\n",
ocsp, ocsp->cert->subject.name, strerror ( rc ) );
ocsp, x509_name ( ocsp->cert ), strerror ( rc ) );
return rc;
}
asn1_skip_any ( &cursor );
@ -836,7 +837,7 @@ static int ocsp_check_signature ( struct ocsp_check *ocsp,
if ( ( rc = pubkey_init ( pubkey, pubkey_ctx, public_key->raw.data,
public_key->raw.len ) ) != 0 ) {
DBGC ( ocsp, "OCSP %p \"%s\" could not initialise public key: "
"%s\n", ocsp, ocsp->cert->subject.name, strerror ( rc ));
"%s\n", ocsp, x509_name ( ocsp->cert ), strerror ( rc ));
goto err_init;
}
@ -845,12 +846,12 @@ static int ocsp_check_signature ( struct ocsp_check *ocsp,
response->signature.data,
response->signature.len ) ) != 0 ) {
DBGC ( ocsp, "OCSP %p \"%s\" signature verification failed: "
"%s\n", ocsp, ocsp->cert->subject.name, strerror ( rc ));
"%s\n", ocsp, x509_name ( ocsp->cert ), strerror ( rc ));
goto err_verify;
}
DBGC2 ( ocsp, "OCSP %p \"%s\" signature is correct\n",
ocsp, ocsp->cert->subject.name );
ocsp, x509_name ( ocsp->cert ) );
err_verify:
pubkey_final ( pubkey, pubkey_ctx );
@ -892,10 +893,10 @@ int ocsp_validate ( struct ocsp_check *ocsp, time_t time ) {
x509_invalidate ( signer );
if ( ( rc = x509_validate ( signer, ocsp->issuer, time,
&ocsp_root ) ) != 0 ) {
DBGC ( ocsp, "OCSP %p \"%s\" could not validate "
"signer \"%s\": %s\n", ocsp,
ocsp->cert->subject.name, signer->subject.name,
strerror ( rc ) );
DBGC ( ocsp, "OCSP %p \"%s\" could not validate ",
ocsp, x509_name ( ocsp->cert ) );
DBGC ( ocsp, "signer \"%s\": %s\n",
x509_name ( signer ), strerror ( rc ) );
return rc;
}
@ -904,9 +905,10 @@ int ocsp_validate ( struct ocsp_check *ocsp, time_t time ) {
*/
if ( ! ( signer->extensions.ext_usage.bits &
X509_OCSP_SIGNING ) ) {
DBGC ( ocsp, "OCSP %p \"%s\" signer \"%s\" is "
"not an OCSP-signing certificate\n", ocsp,
ocsp->cert->subject.name, signer->subject.name );
DBGC ( ocsp, "OCSP %p \"%s\" ",
ocsp, x509_name ( ocsp->cert ) );
DBGC ( ocsp, "signer \"%s\" is not an OCSP-signing "
"certificate\n", x509_name ( signer ) );
return -EACCES_NON_OCSP_SIGNING;
}
}
@ -920,16 +922,16 @@ int ocsp_validate ( struct ocsp_check *ocsp, time_t time ) {
*/
if ( response->this_update > ( time + X509_ERROR_MARGIN_TIME ) ) {
DBGC ( ocsp, "OCSP %p \"%s\" response is not yet valid (at "
"time %lld)\n", ocsp, ocsp->cert->subject.name, time );
"time %lld)\n", ocsp, x509_name ( ocsp->cert ), time );
return -EACCES_STALE;
}
if ( response->next_update < ( time - X509_ERROR_MARGIN_TIME ) ) {
DBGC ( ocsp, "OCSP %p \"%s\" response is stale (at time "
"%lld)\n", ocsp, ocsp->cert->subject.name, time );
"%lld)\n", ocsp, x509_name ( ocsp->cert ), time );
return -EACCES_STALE;
}
DBGC2 ( ocsp, "OCSP %p \"%s\" response is valid (at time %lld)\n",
ocsp, ocsp->cert->subject.name, time );
ocsp, x509_name ( ocsp->cert ), time );
/* Mark certificate as passing OCSP verification */
ocsp->cert->extensions.auth_info.ocsp.good = 1;
@ -938,11 +940,12 @@ int ocsp_validate ( struct ocsp_check *ocsp, time_t time ) {
if ( ( rc = x509_validate ( ocsp->cert, ocsp->issuer, time,
&ocsp_root ) ) != 0 ) {
DBGC ( ocsp, "OCSP %p \"%s\" could not validate certificate: "
"%s\n", ocsp, ocsp->cert->subject.name, strerror ( rc ));
"%s\n", ocsp, x509_name ( ocsp->cert ), strerror ( rc ));
return rc;
}
DBGC ( ocsp, "OCSP %p \"%s\" successfully validated using \"%s\"\n",
ocsp, ocsp->cert->subject.name, signer->subject.name );
DBGC ( ocsp, "OCSP %p \"%s\" successfully validated ",
ocsp, x509_name ( ocsp->cert ) );
DBGC ( ocsp, "using \"%s\"\n", x509_name ( signer ) );
return 0;
}

136
src/crypto/x509.c
View File

@ -103,10 +103,33 @@ FILE_LICENCE ( GPL2_OR_LATER );
__einfo_error ( EINFO_EACCES_OCSP_REQUIRED )
#define EINFO_EACCES_OCSP_REQUIRED \
__einfo_uniqify ( EINFO_EACCES, 0x09, "OCSP check required" )
#define EACCES_WRONG_NAME \
__einfo_error ( EINFO_EACCES_WRONG_NAME )
#define EINFO_EACCES_WRONG_NAME \
__einfo_uniqify ( EINFO_EACCES, 0x0a, "Incorrect certificate name" )
/** Certificate cache */
static LIST_HEAD ( x509_cache );
/**
* Get X.509 certificate name (for debugging)
*
* @v cert X.509 certificate
* @ret name Name (for debugging)
*/
const char * x509_name ( struct x509_certificate *cert ) {
struct asn1_cursor *common_name = &cert->subject.common_name;
static char buf[64];
size_t len;
len = common_name->len;
if ( len > ( sizeof ( buf ) - 1 /* NUL */ ) )
len = ( sizeof ( buf ) - 1 /* NUL */ );
memcpy ( buf, common_name->data, len );
buf[len] = '\0';
return buf;
}
/**
* Free X.509 certificate
*
@ -117,7 +140,6 @@ static void x509_free ( struct refcnt *refcnt ) {
container_of ( refcnt, struct x509_certificate, refcnt );
DBGC2 ( cert, "X509 %p freed\n", cert );
free ( cert->subject.name );
free ( cert->extensions.auth_info.ocsp.uri );
free ( cert );
}
@ -292,11 +314,10 @@ static int x509_parse_validity ( struct x509_certificate *cert,
* Parse X.509 certificate common name
*
* @v cert X.509 certificate
* @v name Common name to fill in
* @v raw ASN.1 cursor
* @ret rc Return status code
*/
static int x509_parse_common_name ( struct x509_certificate *cert, char **name,
static int x509_parse_common_name ( struct x509_certificate *cert,
const struct asn1_cursor *raw ) {
struct asn1_cursor cursor;
struct asn1_cursor oid_cursor;
@ -325,19 +346,9 @@ static int x509_parse_common_name ( struct x509_certificate *cert, char **name,
return rc;
}
/* Allocate and copy name */
*name = zalloc ( name_cursor.len + 1 /* NUL */ );
if ( ! *name )
return -ENOMEM;
memcpy ( *name, name_cursor.data, name_cursor.len );
/* Check that name contains no NULs */
if ( strlen ( *name ) != name_cursor.len ) {
DBGC ( cert, "X509 %p contains malicious commonName:\n",
cert );
DBGC_HDA ( cert, 0, raw->data, raw->len );
return rc;
}
/* Record common name */
memcpy ( &cert->subject.common_name, &name_cursor,
sizeof ( cert->subject.common_name ) );
return 0;
}
@ -357,7 +368,6 @@ static int x509_parse_common_name ( struct x509_certificate *cert, char **name,
static int x509_parse_subject ( struct x509_certificate *cert,
const struct asn1_cursor *raw ) {
struct x509_subject *subject = &cert->subject;
char **name = &subject->name;
int rc;
/* Record raw subject */
@ -367,9 +377,10 @@ static int x509_parse_subject ( struct x509_certificate *cert,
DBGC2_HDA ( cert, 0, subject->raw.data, subject->raw.len );
/* Parse common name */
if ( ( rc = x509_parse_common_name ( cert, name, raw ) ) != 0 )
if ( ( rc = x509_parse_common_name ( cert, raw ) ) != 0 )
return rc;
DBGC2 ( cert, "X509 %p common name is \"%s\":\n", cert, *name );
DBGC2 ( cert, "X509 %p common name is \"%s\":\n", cert,
x509_name ( cert ) );
return 0;
}
@ -1045,7 +1056,7 @@ int x509_certificate ( const void *data, size_t len,
if ( asn1_compare ( &cursor, &(*cert)->raw ) == 0 ) {
DBGC2 ( *cert, "X509 %p \"%s\" cache hit\n",
*cert, (*cert)->subject.name );
*cert, x509_name ( *cert ) );
/* Mark as most recently used */
list_del ( &(*cert)->list );
@ -1109,14 +1120,14 @@ static int x509_check_signature ( struct x509_certificate *cert,
digest_init ( digest, digest_ctx );
digest_update ( digest, digest_ctx, cert->tbs.data, cert->tbs.len );
digest_final ( digest, digest_ctx, digest_out );
DBGC2 ( cert, "X509 %p \"%s\" digest:\n", cert, cert->subject.name );
DBGC2 ( cert, "X509 %p \"%s\" digest:\n", cert, x509_name ( cert ) );
DBGC2_HDA ( cert, 0, digest_out, sizeof ( digest_out ) );
/* Check that signature public key algorithm matches signer */
if ( public_key->algorithm->pubkey != pubkey ) {
DBGC ( cert, "X509 %p \"%s\" signature algorithm %s does not "
"match signer's algorithm %s\n",
cert, cert->subject.name, algorithm->name,
cert, x509_name ( cert ), algorithm->name,
public_key->algorithm->name );
rc = -EINVAL_ALGORITHM_MISMATCH;
goto err_mismatch;
@ -1126,14 +1137,14 @@ static int x509_check_signature ( struct x509_certificate *cert,
if ( ( rc = pubkey_init ( pubkey, pubkey_ctx, public_key->raw.data,
public_key->raw.len ) ) != 0 ) {
DBGC ( cert, "X509 %p \"%s\" cannot initialise public key: "
"%s\n", cert, cert->subject.name, strerror ( rc ) );
"%s\n", cert, x509_name ( cert ), strerror ( rc ) );
goto err_pubkey_init;
}
if ( ( rc = pubkey_verify ( pubkey, pubkey_ctx, digest, digest_out,
signature->value.data,
signature->value.len ) ) != 0 ) {
DBGC ( cert, "X509 %p \"%s\" signature verification failed: "
"%s\n", cert, cert->subject.name, strerror ( rc ) );
"%s\n", cert, x509_name ( cert ), strerror ( rc ) );
goto err_pubkey_verify;
}
@ -1172,9 +1183,10 @@ int x509_check_issuer ( struct x509_certificate *cert,
* for some enjoyable ranting on this subject.
*/
if ( asn1_compare ( &cert->issuer.raw, &issuer->subject.raw ) != 0 ) {
DBGC ( cert, "X509 %p \"%s\" issuer does not match X509 %p "
"\"%s\" subject\n", cert, cert->subject.name,
issuer, issuer->subject.name );
DBGC ( cert, "X509 %p \"%s\" issuer does not match ",
cert, x509_name ( cert ) );
DBGC ( cert, "X509 %p \"%s\" subject\n",
issuer, x509_name ( issuer ) );
DBGC_HDA ( cert, 0, cert->issuer.raw.data,
cert->issuer.raw.len );
DBGC_HDA ( issuer, 0, issuer->subject.raw.data,
@ -1184,16 +1196,18 @@ int x509_check_issuer ( struct x509_certificate *cert,
/* Check that issuer is allowed to sign certificates */
if ( ! issuer->extensions.basic.ca ) {
DBGC ( issuer, "X509 %p \"%s\" cannot sign X509 %p \"%s\": "
"not a CA certificate\n", issuer, issuer->subject.name,
cert, cert->subject.name );
DBGC ( issuer, "X509 %p \"%s\" cannot sign ",
issuer, x509_name ( issuer ) );
DBGC ( issuer, "X509 %p \"%s\": not a CA certificate\n",
cert, x509_name ( cert ) );
return -EACCES_NOT_CA;
}
if ( issuer->extensions.usage.present &&
( ! ( issuer->extensions.usage.bits & X509_KEY_CERT_SIGN ) ) ) {
DBGC ( issuer, "X509 %p \"%s\" cannot sign X509 %p \"%s\": "
"no keyCertSign usage\n", issuer, issuer->subject.name,
cert, cert->subject.name );
DBGC ( issuer, "X509 %p \"%s\" cannot sign ",
issuer, x509_name ( issuer ) );
DBGC ( issuer, "X509 %p \"%s\": no keyCertSign usage\n",
cert, x509_name ( cert ) );
return -EACCES_KEY_USAGE;
}
@ -1243,14 +1257,14 @@ int x509_check_root ( struct x509_certificate *cert, struct x509_root *root ) {
if ( memcmp ( fingerprint, root_fingerprint,
sizeof ( fingerprint ) ) == 0 ) {
DBGC ( cert, "X509 %p \"%s\" is a root certificate\n",
cert, cert->subject.name );
cert, x509_name ( cert ) );
return 0;
}
root_fingerprint += sizeof ( fingerprint );
}
DBGC2 ( cert, "X509 %p \"%s\" is not a root certificate\n",
cert, cert->subject.name );
cert, x509_name ( cert ) );
return -ENOENT;
}
@ -1267,17 +1281,17 @@ int x509_check_time ( struct x509_certificate *cert, time_t time ) {
/* Check validity period */
if ( validity->not_before.time > ( time + X509_ERROR_MARGIN_TIME ) ) {
DBGC ( cert, "X509 %p \"%s\" is not yet valid (at time %lld)\n",
cert, cert->subject.name, time );
cert, x509_name ( cert ), time );
return -EACCES_EXPIRED;
}
if ( validity->not_after.time < ( time - X509_ERROR_MARGIN_TIME ) ) {
DBGC ( cert, "X509 %p \"%s\" has expired (at time %lld)\n",
cert, cert->subject.name, time );
cert, x509_name ( cert ), time );
return -EACCES_EXPIRED;
}
DBGC2 ( cert, "X509 %p \"%s\" is valid (at time %lld)\n",
cert, cert->subject.name, time );
cert, x509_name ( cert ), time );
return 0;
}
@ -1324,15 +1338,15 @@ int x509_validate ( struct x509_certificate *cert,
/* Fail unless we have an issuer */
if ( ! issuer ) {
DBGC2 ( cert, "X509 %p \"%s\" has no issuer\n",
cert, cert->subject.name );
cert, x509_name ( cert ) );
return -EACCES_UNTRUSTED;
}
/* Fail unless issuer has already been validated */
if ( ! issuer->valid ) {
DBGC ( cert, "X509 %p \"%s\" issuer %p \"%s\" has not yet "
"been validated\n", cert, cert->subject.name,
issuer, issuer->subject.name );
DBGC ( cert, "X509 %p \"%s\" ", cert, x509_name ( cert ) );
DBGC ( cert, "issuer %p \"%s\" has not yet been validated\n",
issuer, x509_name ( issuer ) );
return -EACCES_OUT_OF_ORDER;
}
@ -1342,9 +1356,9 @@ int x509_validate ( struct x509_certificate *cert,
/* Fail if path length constraint is violated */
if ( issuer->path_remaining == 0 ) {
DBGC ( cert, "X509 %p \"%s\" issuer %p \"%s\" path length "
"exceeded\n", cert, cert->subject.name,
issuer, issuer->subject.name );
DBGC ( cert, "X509 %p \"%s\" ", cert, x509_name ( cert ) );
DBGC ( cert, "issuer %p \"%s\" path length exceeded\n",
issuer, x509_name ( issuer ) );
return -EACCES_PATH_LEN;
}
@ -1352,7 +1366,7 @@ int x509_validate ( struct x509_certificate *cert,
if ( cert->extensions.auth_info.ocsp.uri &&
( ! cert->extensions.auth_info.ocsp.good ) ) {
DBGC ( cert, "X509 %p \"%s\" requires an OCSP check\n",
cert, cert->subject.name );
cert, x509_name ( cert ) );
return -EACCES_OCSP_REQUIRED;
}
@ -1365,9 +1379,31 @@ int x509_validate ( struct x509_certificate *cert,
/* Mark certificate as valid */
cert->valid = 1;
DBGC ( cert, "X509 %p \"%s\" successfully validated using issuer %p "
"\"%s\"\n", cert, cert->subject.name,
issuer, issuer->subject.name );
DBGC ( cert, "X509 %p \"%s\" successfully validated using ",
cert, x509_name ( cert ) );
DBGC ( cert, "issuer %p \"%s\"\n", issuer, x509_name ( issuer ) );
return 0;
}
/**
* Check X.509 certificate name
*
* @v cert X.509 certificate
* @v name Name
* @ret rc Return status code
*/
int x509_check_name ( struct x509_certificate *cert, const char *name ) {
struct asn1_cursor *common_name = &cert->subject.common_name;
size_t len = strlen ( name );
/* Check commonName */
if ( ! ( ( len == common_name->len ) &&
( memcmp ( name, common_name->data, len ) == 0 ) ) ) {
DBGC ( cert, "X509 %p \"%s\" does not match name \"%s\"\n",
cert, x509_name ( cert ), name );
return -EACCES_WRONG_NAME;
}
return 0;
}
@ -1435,7 +1471,7 @@ int x509_append ( struct x509_chain *chain, struct x509_certificate *cert ) {
link->cert = x509_get ( cert );
list_add_tail ( &link->list, &chain->links );
DBGC ( chain, "X509 chain %p added X509 %p \"%s\"\n",
chain, cert, cert->subject.name );
chain, cert, x509_name ( cert ) );
return 0;
}

5
src/include/ipxe/x509.h
View File

@ -65,7 +65,7 @@ struct x509_subject {
/** Raw subject */
struct asn1_cursor raw;
/** Common name */
char *name;
struct asn1_cursor common_name;
/** Public key information */
struct x509_public_key public_key;
};
@ -330,11 +330,14 @@ struct x509_root {
const void *fingerprints;
};
extern const char * x509_name ( struct x509_certificate *cert );
extern int x509_certificate ( const void *data, size_t len,
struct x509_certificate **cert );
extern int x509_validate ( struct x509_certificate *cert,
struct x509_certificate *issuer,
time_t time, struct x509_root *root );
extern int x509_check_name ( struct x509_certificate *cert, const char *name );
extern struct x509_chain * x509_alloc_chain ( void );
extern int x509_append ( struct x509_chain *chain,

14
src/net/tls.c
View File

@ -49,10 +49,6 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/tls.h>
/* Disambiguate the various error causes */
#define EACCES_WRONG_NAME __einfo_error ( EINFO_EACCES_WRONG_NAME )
#define EINFO_EACCES_WRONG_NAME \
__einfo_uniqify ( EINFO_EACCES, 0x02, \
"Incorrect server name" )
#define EINVAL_CHANGE_CIPHER __einfo_error ( EINFO_EINVAL_CHANGE_CIPHER )
#define EINFO_EINVAL_CHANGE_CIPHER \
__einfo_uniqify ( EINFO_EINVAL, 0x01, \
@ -1479,7 +1475,7 @@ static int tls_parse_chain ( struct tls_session *tls,
}
cert = x509_last ( tls->chain );
DBGC ( tls, "TLS %p found certificate %s\n",
tls, cert->subject.name );
tls, x509_name ( cert ) );
/* Move to next certificate in list */
data = next;
@ -2454,11 +2450,9 @@ static void tls_validator_done ( struct tls_session *tls, int rc ) {
assert ( cert != NULL );
/* Verify server name */
if ( ( cert->subject.name == NULL ) ||
( strcmp ( cert->subject.name, tls->name ) != 0 ) ) {
DBGC ( tls, "TLS %p server name incorrect (expected %s, got "
"%s)\n", tls, tls->name, cert->subject.name );
rc = -EACCES_WRONG_NAME;
if ( ( rc = x509_check_name ( cert, tls->name ) ) != 0 ) {
DBGC ( tls, "TLS %p server certificate does not match %s: %s\n",
tls, tls->name, strerror ( rc ) );
goto err;
}

2
src/net/validator.c
View File

@ -179,7 +179,7 @@ static int validator_append ( struct validator *validator,
}
cert = x509_last ( certs );
DBGC ( validator, "VALIDATOR %p found certificate %s\n",
validator, cert->subject.name );
validator, x509_name ( cert ) );
/* Move to next certificate */
asn1_skip_any ( &cursor );