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-rw-r--r--src/shared/pkcs11-util.c1033
1 files changed, 875 insertions, 158 deletions
diff --git a/src/shared/pkcs11-util.c b/src/shared/pkcs11-util.c
index 6e88dc3..b5cd9a3 100644
--- a/src/shared/pkcs11-util.c
+++ b/src/shared/pkcs11-util.c
@@ -43,22 +43,29 @@ bool pkcs11_uri_valid(const char *uri) {
static void *p11kit_dl = NULL;
-char *(*sym_p11_kit_module_get_name)(CK_FUNCTION_LIST *module);
-void (*sym_p11_kit_modules_finalize_and_release)(CK_FUNCTION_LIST **modules);
-CK_FUNCTION_LIST **(*sym_p11_kit_modules_load_and_initialize)(int flags);
-const char *(*sym_p11_kit_strerror)(CK_RV rv);
-int (*sym_p11_kit_uri_format)(P11KitUri *uri, P11KitUriType uri_type, char **string);
-void (*sym_p11_kit_uri_free)(P11KitUri *uri);
-CK_ATTRIBUTE_PTR (*sym_p11_kit_uri_get_attributes)(P11KitUri *uri, CK_ULONG *n_attrs);
-CK_INFO_PTR (*sym_p11_kit_uri_get_module_info)(P11KitUri *uri);
-CK_SLOT_INFO_PTR (*sym_p11_kit_uri_get_slot_info)(P11KitUri *uri);
-CK_TOKEN_INFO_PTR (*sym_p11_kit_uri_get_token_info)(P11KitUri *uri);
-int (*sym_p11_kit_uri_match_token_info)(const P11KitUri *uri, const CK_TOKEN_INFO *token_info);
-const char *(*sym_p11_kit_uri_message)(int code);
-P11KitUri *(*sym_p11_kit_uri_new)(void);
-int (*sym_p11_kit_uri_parse)(const char *string, P11KitUriType uri_type, P11KitUri *uri);
+DLSYM_FUNCTION(p11_kit_module_get_name);
+DLSYM_FUNCTION(p11_kit_modules_finalize_and_release);
+DLSYM_FUNCTION(p11_kit_modules_load_and_initialize);
+DLSYM_FUNCTION(p11_kit_strerror);
+DLSYM_FUNCTION(p11_kit_uri_format);
+DLSYM_FUNCTION(p11_kit_uri_free);
+DLSYM_FUNCTION(p11_kit_uri_get_attributes);
+DLSYM_FUNCTION(p11_kit_uri_get_attribute);
+DLSYM_FUNCTION(p11_kit_uri_set_attribute);
+DLSYM_FUNCTION(p11_kit_uri_get_module_info);
+DLSYM_FUNCTION(p11_kit_uri_get_slot_info);
+DLSYM_FUNCTION(p11_kit_uri_get_token_info);
+DLSYM_FUNCTION(p11_kit_uri_match_token_info);
+DLSYM_FUNCTION(p11_kit_uri_message);
+DLSYM_FUNCTION(p11_kit_uri_new);
+DLSYM_FUNCTION(p11_kit_uri_parse);
int dlopen_p11kit(void) {
+ ELF_NOTE_DLOPEN("p11-kit",
+ "Support for PKCS11 hardware tokens",
+ ELF_NOTE_DLOPEN_PRIORITY_SUGGESTED,
+ "libp11-kit.so.0");
+
return dlopen_many_sym_or_warn(
&p11kit_dl,
"libp11-kit.so.0", LOG_DEBUG,
@@ -69,6 +76,8 @@ int dlopen_p11kit(void) {
DLSYM_ARG(p11_kit_uri_format),
DLSYM_ARG(p11_kit_uri_free),
DLSYM_ARG(p11_kit_uri_get_attributes),
+ DLSYM_ARG(p11_kit_uri_get_attribute),
+ DLSYM_ARG(p11_kit_uri_set_attribute),
DLSYM_ARG(p11_kit_uri_get_module_info),
DLSYM_ARG(p11_kit_uri_get_slot_info),
DLSYM_ARG(p11_kit_uri_get_token_info),
@@ -287,12 +296,11 @@ int pkcs11_token_login(
CK_SLOT_ID slotid,
const CK_TOKEN_INFO *token_info,
const char *friendly_name,
- const char *icon_name,
- const char *key_name,
- const char *credential_name,
+ const char *askpw_icon,
+ const char *askpw_keyring,
+ const char *askpw_credential,
usec_t until,
- AskPasswordFlags ask_password_flags,
- bool headless,
+ AskPasswordFlags askpw_flags,
char **ret_used_pin) {
_cleanup_free_ char *token_uri_string = NULL, *token_uri_escaped = NULL, *id = NULL, *token_label = NULL;
@@ -347,7 +355,7 @@ int pkcs11_token_login(
if (!passwords)
return log_oom();
- } else if (headless)
+ } else if (FLAGS_SET(askpw_flags, ASK_PASSWORD_HEADLESS))
return log_error_errno(SYNTHETIC_ERRNO(ENOPKG), "PIN querying disabled via 'headless' option. Use the 'PIN' environment variable.");
else {
_cleanup_free_ char *text = NULL;
@@ -371,8 +379,16 @@ int pkcs11_token_login(
if (r < 0)
return log_oom();
+ AskPasswordRequest req = {
+ .message = text,
+ .icon = askpw_icon,
+ .id = id,
+ .keyring = askpw_keyring,
+ .credential = askpw_credential,
+ };
+
/* We never cache PINs, simply because it's fatal if we use wrong PINs, since usually there are only 3 tries */
- r = ask_password_auto(text, icon_name, id, key_name, credential_name, until, ask_password_flags, &passwords);
+ r = ask_password_auto(&req, until, askpw_flags, &passwords);
if (r < 0)
return log_error_errno(r, "Failed to query PIN for security token '%s': %m", token_label);
}
@@ -523,13 +539,294 @@ int pkcs11_token_find_x509_certificate(
}
#if HAVE_OPENSSL
+static int read_public_key_info(
+ CK_FUNCTION_LIST *m,
+ CK_SESSION_HANDLE session,
+ CK_OBJECT_HANDLE object,
+ EVP_PKEY **ret_pkey) {
+
+ CK_ATTRIBUTE attribute = { CKA_PUBLIC_KEY_INFO, NULL_PTR, 0 };
+ _cleanup_(EVP_PKEY_freep) EVP_PKEY *pkey = NULL;
+ CK_RV rv;
+
+ rv = m->C_GetAttributeValue(session, object, &attribute, 1);
+ if (rv != CKR_OK)
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Failed to get size of CKA_PUBLIC_KEY_INFO: %s", sym_p11_kit_strerror(rv));
+
+ if (attribute.ulValueLen == 0)
+ return log_debug_errno(SYNTHETIC_ERRNO(ENOENT), "CKA_PUBLIC_KEY_INFO is empty");
+
+ _cleanup_free_ void *buffer = malloc(attribute.ulValueLen);
+ if (!buffer)
+ return log_oom_debug();
+
+ attribute.pValue = buffer;
+
+ rv = m->C_GetAttributeValue(session, object, &attribute, 1);
+ if (rv != CKR_OK)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to read CKA_PUBLIC_KEY_INFO: %s", sym_p11_kit_strerror(rv));
+
+ const unsigned char *value = attribute.pValue;
+ pkey = d2i_PUBKEY(NULL, &value, attribute.ulValueLen);
+ if (!pkey)
+ return log_debug_errno(SYNTHETIC_ERRNO(EBADMSG), "Failed to parse CKA_PUBLIC_KEY_INFO");
+
+ *ret_pkey = TAKE_PTR(pkey);
+ return 0;
+}
+
+int pkcs11_token_read_public_key(
+ CK_FUNCTION_LIST *m,
+ CK_SESSION_HANDLE session,
+ CK_OBJECT_HANDLE object,
+ EVP_PKEY **ret_pkey) {
+
+ _cleanup_(EVP_PKEY_freep) EVP_PKEY *pkey = NULL;
+ CK_RV rv;
+ int r;
+
+ r = read_public_key_info(m, session, object, &pkey);
+ if (r >= 0) {
+ *ret_pkey = TAKE_PTR(pkey);
+ return 0;
+ }
+
+ CK_KEY_TYPE key_type;
+ CK_ATTRIBUTE attribute = { CKA_KEY_TYPE, &key_type, sizeof(key_type) };
+
+ rv = m->C_GetAttributeValue(session, object, &attribute, 1);
+ if (rv != CKR_OK)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to get CKA_KEY_TYPE of a public key: %s", sym_p11_kit_strerror(rv));
+
+ switch (key_type) {
+ case CKK_RSA: {
+ CK_ATTRIBUTE rsa_attributes[] = {
+ { CKA_MODULUS, NULL_PTR, 0 },
+ { CKA_PUBLIC_EXPONENT, NULL_PTR, 0 },
+ };
+
+ rv = m->C_GetAttributeValue(session, object, rsa_attributes, ELEMENTSOF(rsa_attributes));
+ if (rv != CKR_OK)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to get size of attributes of an RSA public key: %s", sym_p11_kit_strerror(rv));
+
+ if (rsa_attributes[0].ulValueLen == 0)
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "An RSA public key has empty CKA_MODULUS.");
+
+ _cleanup_free_ void *modulus = malloc(rsa_attributes[0].ulValueLen);
+ if (!modulus)
+ return log_oom_debug();
+
+ rsa_attributes[0].pValue = modulus;
+
+ if (rsa_attributes[1].ulValueLen == 0)
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "An RSA public key has empty CKA_PUBLIC_EXPONENT.");
+
+ _cleanup_free_ void *public_exponent = malloc(rsa_attributes[1].ulValueLen);
+ if (!public_exponent)
+ return log_oom_debug();
+
+ rsa_attributes[1].pValue = public_exponent;
+
+ rv = m->C_GetAttributeValue(session, object, rsa_attributes, ELEMENTSOF(rsa_attributes));
+ if (rv != CKR_OK)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to get attributes of an RSA public key: %s", sym_p11_kit_strerror(rv));
+
+ size_t n_size = rsa_attributes[0].ulValueLen, e_size = rsa_attributes[1].ulValueLen;
+ r = rsa_pkey_from_n_e(rsa_attributes[0].pValue, n_size, rsa_attributes[1].pValue, e_size, &pkey);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to create an EVP_PKEY from RSA parameters.");
+
+ break;
+ }
+ case CKK_EC: {
+ CK_ATTRIBUTE ec_attributes[] = {
+ { CKA_EC_PARAMS, NULL_PTR, 0 },
+ { CKA_EC_POINT, NULL_PTR, 0 },
+ };
+
+ rv = m->C_GetAttributeValue(session, object, ec_attributes, ELEMENTSOF(ec_attributes));
+ if (rv != CKR_OK)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to get size of attributes of an EC public key: %s", sym_p11_kit_strerror(rv));
+
+ if (ec_attributes[0].ulValueLen == 0)
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "An EC public key has empty CKA_EC_PARAMS.");
+
+ _cleanup_free_ void *ec_group = malloc(ec_attributes[0].ulValueLen);
+ if (!ec_group)
+ return log_oom_debug();
+
+ ec_attributes[0].pValue = ec_group;
+
+ if (ec_attributes[1].ulValueLen == 0)
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "An EC public key has empty CKA_EC_POINT.");
+
+ _cleanup_free_ void *ec_point = malloc(ec_attributes[1].ulValueLen);
+ if (!ec_point)
+ return log_oom_debug();
+
+ ec_attributes[1].pValue = ec_point;
+
+ rv = m->C_GetAttributeValue(session, object, ec_attributes, ELEMENTSOF(ec_attributes));
+ if (rv != CKR_OK)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to get attributes of an EC public key: %s", sym_p11_kit_strerror(rv));
+
+ _cleanup_(EC_GROUP_freep) EC_GROUP *group = NULL;
+ _cleanup_(ASN1_OCTET_STRING_freep) ASN1_OCTET_STRING *os = NULL;
+
+ const unsigned char *ec_params_value = ec_attributes[0].pValue;
+ group = d2i_ECPKParameters(NULL, &ec_params_value, ec_attributes[0].ulValueLen);
+ if (!group)
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Unable to decode CKA_EC_PARAMS.");
+
+ const unsigned char *ec_point_value = ec_attributes[1].pValue;
+ os = d2i_ASN1_OCTET_STRING(NULL, &ec_point_value, ec_attributes[1].ulValueLen);
+ if (!os)
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Unable to decode CKA_EC_POINT.");
+
+#if OPENSSL_VERSION_MAJOR >= 3
+ _cleanup_(EVP_PKEY_CTX_freep) EVP_PKEY_CTX *ctx = EVP_PKEY_CTX_new_from_name(NULL, "EC", NULL);
+ if (!ctx)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to create an EVP_PKEY_CTX for EC.");
+
+ if (EVP_PKEY_fromdata_init(ctx) != 1)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to init an EVP_PKEY_CTX for EC.");
+
+ OSSL_PARAM ec_params[8] = {
+ OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_PUB_KEY, os->data, os->length)
+ };
+
+ _cleanup_free_ void *order = NULL, *p = NULL, *a = NULL, *b = NULL, *generator = NULL;
+ size_t order_size, p_size, a_size, b_size, generator_size;
+
+ int nid = EC_GROUP_get_curve_name(group);
+ if (nid != NID_undef) {
+ const char* name = OSSL_EC_curve_nid2name(nid);
+ ec_params[1] = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME, (char*)name, strlen(name));
+ ec_params[2] = OSSL_PARAM_construct_end();
+ } else {
+ const char *field_type = EC_GROUP_get_field_type(group) == NID_X9_62_prime_field ?
+ "prime-field" : "characteristic-two-field";
+
+ const BIGNUM *bn_order = EC_GROUP_get0_order(group);
+
+ _cleanup_(BN_CTX_freep) BN_CTX *bnctx = BN_CTX_new();
+ if (!bnctx)
+ return log_oom_debug();
+
+ _cleanup_(BN_freep) BIGNUM *bn_p = BN_new();
+ if (!bn_p)
+ return log_oom_debug();
+
+ _cleanup_(BN_freep) BIGNUM *bn_a = BN_new();
+ if (!bn_a)
+ return log_oom_debug();
+
+ _cleanup_(BN_freep) BIGNUM *bn_b = BN_new();
+ if (!bn_b)
+ return log_oom_debug();
+
+ if (EC_GROUP_get_curve(group, bn_p, bn_a, bn_b, bnctx) != 1)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to extract EC parameters from EC_GROUP.");
+
+ order_size = BN_num_bytes(bn_order);
+ p_size = BN_num_bytes(bn_p);
+ a_size = BN_num_bytes(bn_a);
+ b_size = BN_num_bytes(bn_b);
+
+ order = malloc(order_size);
+ if (!order)
+ return log_oom_debug();
+
+ p = malloc(p_size);
+ if (!p)
+ return log_oom_debug();
+
+ a = malloc(a_size);
+ if (!a)
+ return log_oom_debug();
+
+ b = malloc(b_size);
+ if (!b)
+ return log_oom_debug();
+
+ if (BN_bn2nativepad(bn_order, order, order_size) <= 0 ||
+ BN_bn2nativepad(bn_p, p, p_size) <= 0 ||
+ BN_bn2nativepad(bn_a, a, a_size) <= 0 ||
+ BN_bn2nativepad(bn_b, b, b_size) <= 0 )
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to store EC parameters in native byte order.");
+
+ const EC_POINT *point_gen = EC_GROUP_get0_generator(group);
+ generator_size = EC_POINT_point2oct(group, point_gen, POINT_CONVERSION_UNCOMPRESSED, NULL, 0, bnctx);
+ if (generator_size == 0)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to determine size of a EC generator.");
+
+ generator = malloc(generator_size);
+ if (!generator)
+ return log_oom_debug();
+
+ generator_size = EC_POINT_point2oct(group, point_gen, POINT_CONVERSION_UNCOMPRESSED, generator, generator_size, bnctx);
+ if (generator_size == 0)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to convert a EC generator to octet string.");
+
+ ec_params[1] = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_EC_FIELD_TYPE, (char*)field_type, strlen(field_type));
+ ec_params[2] = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_EC_GENERATOR, generator, generator_size);
+ ec_params[3] = OSSL_PARAM_construct_BN(OSSL_PKEY_PARAM_EC_ORDER, order, order_size);
+ ec_params[4] = OSSL_PARAM_construct_BN(OSSL_PKEY_PARAM_EC_P, p, p_size);
+ ec_params[5] = OSSL_PARAM_construct_BN(OSSL_PKEY_PARAM_EC_A, a, a_size);
+ ec_params[6] = OSSL_PARAM_construct_BN(OSSL_PKEY_PARAM_EC_B, b, b_size);
+ ec_params[7] = OSSL_PARAM_construct_end();
+ }
+
+ if (EVP_PKEY_fromdata(ctx, &pkey, EVP_PKEY_PUBLIC_KEY, ec_params) != 1)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to create EVP_PKEY from EC parameters.");
+#else
+ _cleanup_(EC_POINT_freep) EC_POINT *point = EC_POINT_new(group);
+ if (!point)
+ return log_oom_debug();
+
+ if (EC_POINT_oct2point(group, point, os->data, os->length, NULL) != 1)
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Unable to decode CKA_EC_POINT.");
+
+ _cleanup_(EC_KEY_freep) EC_KEY *ec_key = EC_KEY_new();
+ if (!ec_key)
+ return log_oom_debug();
+
+ if (EC_KEY_set_group(ec_key, group) != 1)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to set group for EC_KEY.");
+
+ if (EC_KEY_set_public_key(ec_key, point) != 1)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to set public key for EC_KEY.");
+
+ pkey = EVP_PKEY_new();
+ if (!pkey)
+ return log_oom_debug();
+
+ if (EVP_PKEY_set1_EC_KEY(pkey, ec_key) != 1)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to assign EC_KEY to EVP_PKEY.");
+#endif
+ break;
+ }
+ default:
+ return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Unsupported type of public key: %lu", key_type);
+ }
+
+ *ret_pkey = TAKE_PTR(pkey);
+ return 0;
+}
+
int pkcs11_token_read_x509_certificate(
CK_FUNCTION_LIST *m,
CK_SESSION_HANDLE session,
CK_OBJECT_HANDLE object,
X509 **ret_cert) {
- _cleanup_free_ void *buffer = NULL;
_cleanup_free_ char *t = NULL;
CK_ATTRIBUTE attribute = {
.type = CKA_VALUE
@@ -537,7 +834,6 @@ int pkcs11_token_read_x509_certificate(
CK_RV rv;
_cleanup_(X509_freep) X509 *x509 = NULL;
X509_NAME *name = NULL;
- const unsigned char *p;
int r;
r = dlopen_p11kit();
@@ -546,32 +842,32 @@ int pkcs11_token_read_x509_certificate(
rv = m->C_GetAttributeValue(session, object, &attribute, 1);
if (rv != CKR_OK)
- return log_error_errno(SYNTHETIC_ERRNO(EIO),
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO),
"Failed to read X.509 certificate size off token: %s", sym_p11_kit_strerror(rv));
- buffer = malloc(attribute.ulValueLen);
+ _cleanup_free_ void *buffer = malloc(attribute.ulValueLen);
if (!buffer)
- return log_oom();
+ return log_oom_debug();
attribute.pValue = buffer;
rv = m->C_GetAttributeValue(session, object, &attribute, 1);
if (rv != CKR_OK)
- return log_error_errno(SYNTHETIC_ERRNO(EIO),
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO),
"Failed to read X.509 certificate data off token: %s", sym_p11_kit_strerror(rv));
- p = attribute.pValue;
+ const unsigned char *p = attribute.pValue;
x509 = d2i_X509(NULL, &p, attribute.ulValueLen);
if (!x509)
- return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Failed parse X.509 certificate.");
+ return log_debug_errno(SYNTHETIC_ERRNO(EBADMSG), "Failed to parse X.509 certificate.");
name = X509_get_subject_name(x509);
if (!name)
- return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Failed to acquire X.509 subject name.");
+ return log_debug_errno(SYNTHETIC_ERRNO(EBADMSG), "Failed to acquire X.509 subject name.");
t = X509_NAME_oneline(name, NULL, 0);
if (!t)
- return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to format X.509 subject name as string.");
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to format X.509 subject name as string.");
log_debug("Using X.509 certificate issued for '%s'.", t);
@@ -586,143 +882,429 @@ int pkcs11_token_find_private_key(
P11KitUri *search_uri,
CK_OBJECT_HANDLE *ret_object) {
- bool found_decrypt = false, found_class = false, found_key_type = false;
+ bool found_class = false;
_cleanup_free_ CK_ATTRIBUTE *attributes_buffer = NULL;
- CK_ULONG n_attributes, a, n_objects;
- CK_ATTRIBUTE *attributes = NULL;
- CK_OBJECT_HANDLE objects[2];
- CK_RV rv, rv2;
- int r;
+ CK_KEY_TYPE key_type;
+ CK_BBOOL decrypt_value, derive_value;
+ CK_ATTRIBUTE optional_attributes[] = {
+ { CKA_KEY_TYPE, &key_type, sizeof(key_type) },
+ { CKA_DECRYPT, &decrypt_value, sizeof(decrypt_value) },
+ { CKA_DERIVE, &derive_value, sizeof(derive_value) },
+ };
+ uint8_t n_private_keys = 0;
+ CK_OBJECT_HANDLE private_key = CK_INVALID_HANDLE;
+ CK_RV rv;
assert(m);
assert(search_uri);
assert(ret_object);
- r = dlopen_p11kit();
- if (r < 0)
- return r;
-
- attributes = sym_p11_kit_uri_get_attributes(search_uri, &n_attributes);
- for (a = 0; a < n_attributes; a++) {
+ CK_ULONG n_attributes;
+ CK_ATTRIBUTE *attributes = sym_p11_kit_uri_get_attributes(search_uri, &n_attributes);
+ for (CK_ULONG i = 0; i < n_attributes; i++) {
/* We use the URI's included match attributes, but make them more strict. This allows users
* to specify a token URL instead of an object URL and the right thing should happen if
* there's only one suitable key on the token. */
- switch (attributes[a].type) {
-
+ switch (attributes[i].type) {
case CKA_CLASS: {
- CK_OBJECT_CLASS c;
-
- if (attributes[a].ulValueLen != sizeof(c))
+ if (attributes[i].ulValueLen != sizeof(CK_OBJECT_CLASS))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid PKCS#11 CKA_CLASS attribute size.");
- memcpy(&c, attributes[a].pValue, sizeof(c));
- if (c != CKO_PRIVATE_KEY)
+ CK_OBJECT_CLASS *class = (CK_OBJECT_CLASS*) attributes[i].pValue;
+ if (*class != CKO_PRIVATE_KEY)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Selected PKCS#11 object is not a private key, refusing.");
found_class = true;
break;
- }
+ }}
+ }
- case CKA_DECRYPT: {
- CK_BBOOL b;
+ if (!found_class) {
+ /* Hmm, let's slightly extend the attribute list we search for */
+ static const CK_OBJECT_CLASS required_class = CKO_PRIVATE_KEY;
- if (attributes[a].ulValueLen != sizeof(b))
- return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid PKCS#11 CKA_DECRYPT attribute size.");
+ attributes_buffer = new(CK_ATTRIBUTE, n_attributes + 1);
+ if (!attributes_buffer)
+ return log_oom();
- memcpy(&b, attributes[a].pValue, sizeof(b));
- if (!b)
- return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
- "Selected PKCS#11 object is not suitable for decryption, refusing.");
+ memcpy(attributes_buffer, attributes, sizeof(CK_ATTRIBUTE) * n_attributes);
+
+ attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) {
+ .type = CKA_CLASS,
+ .pValue = (CK_OBJECT_CLASS*) &required_class,
+ .ulValueLen = sizeof(required_class),
+ };
+
+ attributes = attributes_buffer;
+ }
- found_decrypt = true;
+ rv = m->C_FindObjectsInit(session, attributes, n_attributes);
+ if (rv != CKR_OK)
+ return log_error_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to initialize object find call: %s", sym_p11_kit_strerror(rv));
+
+ for (;;) {
+ CK_ULONG b;
+ CK_OBJECT_HANDLE candidate;
+ rv = m->C_FindObjects(session, &candidate, 1, &b);
+ if (rv != CKR_OK)
+ return log_error_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to find objects: %s", sym_p11_kit_strerror(rv));
+
+ if (b == 0)
break;
- }
- case CKA_KEY_TYPE: {
- CK_KEY_TYPE t;
+ optional_attributes[0].ulValueLen = sizeof(key_type);
+ optional_attributes[1].ulValueLen = sizeof(decrypt_value);
+ optional_attributes[2].ulValueLen = sizeof(derive_value);
- if (attributes[a].ulValueLen != sizeof(t))
- return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid PKCS#11 CKA_KEY_TYPE attribute size.");
+ rv = m->C_GetAttributeValue(session, candidate, optional_attributes, ELEMENTSOF(optional_attributes));
+ if (!IN_SET(rv, CKR_OK, CKR_ATTRIBUTE_TYPE_INVALID))
+ return log_error_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to get attributes of a found private key: %s", sym_p11_kit_strerror(rv));
- memcpy(&t, attributes[a].pValue, sizeof(t));
- if (t != CKK_RSA)
- return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Selected PKCS#11 object is not an RSA key, refusing.");
+ if (optional_attributes[0].ulValueLen == CK_UNAVAILABLE_INFORMATION) {
+ log_debug("A found private key does not have CKA_KEY_TYPE, rejecting the key.");
+ continue;
+ }
+
+ if (key_type == CKK_RSA)
+ if (optional_attributes[1].ulValueLen == CK_UNAVAILABLE_INFORMATION || decrypt_value == CK_FALSE) {
+ log_debug("A found private RSA key can't decrypt, rejecting the key.");
+ continue;
+ }
- found_key_type = true;
+ if (key_type == CKK_EC)
+ if (optional_attributes[2].ulValueLen == CK_UNAVAILABLE_INFORMATION || derive_value == CK_FALSE) {
+ log_debug("A found private EC key can't derive, rejecting the key.");
+ continue;
+ }
+
+ n_private_keys++;
+ if (n_private_keys > 1)
break;
- }}
+ private_key = candidate;
}
- if (!found_decrypt || !found_class || !found_key_type) {
- /* Hmm, let's slightly extend the attribute list we search for */
+ rv = m->C_FindObjectsFinal(session);
+ if (rv != CKR_OK)
+ return log_error_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to finalize object find call: %s", sym_p11_kit_strerror(rv));
- attributes_buffer = new(CK_ATTRIBUTE, n_attributes + !found_decrypt + !found_class + !found_key_type);
- if (!attributes_buffer)
+ if (n_private_keys == 0)
+ return log_error_errno(SYNTHETIC_ERRNO(ENOENT),
+ "Failed to find selected private key suitable for decryption or derivation on token.");
+
+ if (n_private_keys > 1)
+ return log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ),
+ "Configured private key URI matches multiple keys, refusing.");
+
+ *ret_object = private_key;
+ return 0;
+}
+
+static const char* object_class_to_string(CK_OBJECT_CLASS class) {
+ switch (class) {
+ case CKO_CERTIFICATE:
+ return "CKO_CERTIFICATE";
+ case CKO_PUBLIC_KEY:
+ return "CKO_PUBLIC_KEY";
+ case CKO_PRIVATE_KEY:
+ return "CKO_PRIVATE_KEY";
+ case CKO_SECRET_KEY:
+ return "CKO_SECRET_KEY";
+ default:
+ return NULL;
+ }
+}
+
+/* Returns an object with the given class and the same CKA_ID or CKA_LABEL as prototype */
+int pkcs11_token_find_related_object(
+ CK_FUNCTION_LIST *m,
+ CK_SESSION_HANDLE session,
+ CK_OBJECT_HANDLE prototype,
+ CK_OBJECT_CLASS class,
+ CK_OBJECT_HANDLE *ret_object ) {
+
+ _cleanup_free_ void *buffer = NULL;
+ CK_ATTRIBUTE attributes[] = {
+ { CKA_ID, NULL_PTR, 0 },
+ { CKA_LABEL, NULL_PTR, 0 }
+ };
+ CK_OBJECT_CLASS search_class = class;
+ CK_ATTRIBUTE search_attributes[2] = {
+ { CKA_CLASS, &search_class, sizeof(search_class) }
+ };
+ CK_ULONG n_objects;
+ CK_OBJECT_HANDLE objects[2];
+ CK_RV rv;
+
+ rv = m->C_GetAttributeValue(session, prototype, attributes, ELEMENTSOF(attributes));
+ if (!IN_SET(rv, CKR_OK, CKR_ATTRIBUTE_TYPE_INVALID))
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to retrieve length of attributes: %s", sym_p11_kit_strerror(rv));
+
+ if (attributes[0].ulValueLen != CK_UNAVAILABLE_INFORMATION) {
+ buffer = malloc(attributes[0].ulValueLen);
+ if (!buffer)
return log_oom();
- memcpy(attributes_buffer, attributes, sizeof(CK_ATTRIBUTE) * n_attributes);
+ attributes[0].pValue = buffer;
+ rv = m->C_GetAttributeValue(session, prototype, &attributes[0], 1);
+ if (rv != CKR_OK)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to retrieve CKA_ID: %s", sym_p11_kit_strerror(rv));
- if (!found_decrypt) {
- static const CK_BBOOL yes = true;
+ search_attributes[1] = attributes[0];
- attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) {
- .type = CKA_DECRYPT,
- .pValue = (CK_BBOOL*) &yes,
- .ulValueLen = sizeof(yes),
- };
- }
+ } else if (attributes[1].ulValueLen != CK_UNAVAILABLE_INFORMATION) {
+ buffer = malloc(attributes[1].ulValueLen);
+ if (!buffer)
+ return log_oom();
- if (!found_class) {
- static const CK_OBJECT_CLASS class = CKO_PRIVATE_KEY;
+ attributes[1].pValue = buffer;
+ rv = m->C_GetAttributeValue(session, prototype, &attributes[1], 1);
+ if (rv != CKR_OK)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to retrieve CKA_LABEL: %s", sym_p11_kit_strerror(rv));
- attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) {
- .type = CKA_CLASS,
- .pValue = (CK_OBJECT_CLASS*) &class,
- .ulValueLen = sizeof(class),
- };
- }
+ search_attributes[1] = attributes[1];
- if (!found_key_type) {
- static const CK_KEY_TYPE type = CKK_RSA;
+ } else
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "The prototype does not have CKA_ID or CKA_LABEL");
- attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) {
- .type = CKA_KEY_TYPE,
- .pValue = (CK_KEY_TYPE*) &type,
- .ulValueLen = sizeof(type),
- };
- }
+ rv = m->C_FindObjectsInit(session, search_attributes, 2);
+ if (rv != CKR_OK)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to initialize object find call: %s", sym_p11_kit_strerror(rv));
- attributes = attributes_buffer;
+ rv = m->C_FindObjects(session, objects, 2, &n_objects);
+ if (rv != CKR_OK)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to find objects: %s", sym_p11_kit_strerror(rv));
+
+ rv = m->C_FindObjectsFinal(session);
+ if (rv != CKR_OK)
+ return log_debug_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to finalize object find call: %s", sym_p11_kit_strerror(rv));
+
+ if (n_objects == 0)
+ return log_debug_errno(SYNTHETIC_ERRNO(ENOENT),
+ "Failed to find a related object with class %s", object_class_to_string(class));
+
+ if (n_objects > 1)
+ log_warning("Found multiple related objects with class %s, using the first object.",
+ object_class_to_string(class));
+
+ *ret_object = objects[0];
+ return 0;
+}
+
+#if HAVE_OPENSSL
+static int ecc_convert_to_compressed(
+ CK_FUNCTION_LIST *m,
+ CK_SESSION_HANDLE session,
+ CK_OBJECT_HANDLE object,
+ const void *uncompressed_point,
+ size_t uncompressed_point_size,
+ void **ret_compressed_point,
+ size_t *ret_compressed_point_size) {
+
+ _cleanup_free_ void *ec_params_buffer = NULL;
+ CK_ATTRIBUTE ec_params_attr = { CKA_EC_PARAMS, NULL_PTR, 0 };
+ CK_RV rv;
+ int r;
+
+ rv = m->C_GetAttributeValue(session, object, &ec_params_attr, 1);
+ if (!IN_SET(rv, CKR_OK, CKR_ATTRIBUTE_TYPE_INVALID))
+ return log_error_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to retrieve length of CKA_EC_PARAMS: %s", sym_p11_kit_strerror(rv));
+
+ if (ec_params_attr.ulValueLen != CK_UNAVAILABLE_INFORMATION) {
+ ec_params_buffer = malloc(ec_params_attr.ulValueLen);
+ if (!ec_params_buffer)
+ return log_oom();
+
+ ec_params_attr.pValue = ec_params_buffer;
+ rv = m->C_GetAttributeValue(session, object, &ec_params_attr, 1);
+ if (rv != CKR_OK)
+ return log_error_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to retrieve CKA_EC_PARAMS from a private key: %s", sym_p11_kit_strerror(rv));
+ } else {
+ CK_OBJECT_HANDLE public_key;
+ r = pkcs11_token_find_related_object(m, session, object, CKO_PUBLIC_KEY, &public_key);
+ if (r < 0)
+ return log_error_errno(r, "Failed to find a public key for compressing a EC point");
+
+ ec_params_attr.ulValueLen = 0;
+ rv = m->C_GetAttributeValue(session, public_key, &ec_params_attr, 1);
+ if (!IN_SET(rv, CKR_OK, CKR_ATTRIBUTE_TYPE_INVALID))
+ return log_error_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to retrieve length of CKA_EC_PARAMS: %s", sym_p11_kit_strerror(rv));
+
+ if (ec_params_attr.ulValueLen == CK_UNAVAILABLE_INFORMATION)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "The public key does not have CKA_EC_PARAMS");
+
+ ec_params_buffer = malloc(ec_params_attr.ulValueLen);
+ if (!ec_params_buffer)
+ return log_oom();
+
+ ec_params_attr.pValue = ec_params_buffer;
+ rv = m->C_GetAttributeValue(session, public_key, &ec_params_attr, 1);
+ if (rv != CKR_OK)
+ return log_error_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to retrieve CKA_EC_PARAMS from a public key: %s", sym_p11_kit_strerror(rv));
}
- rv = m->C_FindObjectsInit(session, attributes, n_attributes);
+ _cleanup_(EC_GROUP_freep) EC_GROUP *group = NULL;
+ _cleanup_(EC_POINT_freep) EC_POINT *point = NULL;
+ _cleanup_(BN_CTX_freep) BN_CTX *bnctx = NULL;
+ _cleanup_free_ void *compressed_point = NULL;
+ size_t compressed_point_size;
+
+ const unsigned char *ec_params_value = ec_params_attr.pValue;
+ group = d2i_ECPKParameters(NULL, &ec_params_value, ec_params_attr.ulValueLen);
+ if (!group)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unable to decode CKA_EC_PARAMS");
+
+ point = EC_POINT_new(group);
+ if (!point)
+ return log_oom();
+
+ bnctx = BN_CTX_new();
+ if (!bnctx)
+ return log_oom();
+
+ if (EC_POINT_oct2point(group, point, uncompressed_point, uncompressed_point_size, bnctx) != 1)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unable to decode an uncompressed EC point");
+
+ compressed_point_size = EC_POINT_point2oct(group, point, POINT_CONVERSION_COMPRESSED, NULL, 0, bnctx);
+ if (compressed_point_size == 0)
+ return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to determine size of a compressed EC point");
+
+ compressed_point = malloc(compressed_point_size);
+ if (!compressed_point)
+ return log_oom();
+
+ compressed_point_size = EC_POINT_point2oct(group, point, POINT_CONVERSION_COMPRESSED, compressed_point, compressed_point_size, bnctx);
+ if (compressed_point_size == 0)
+ return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to convert a EC point to compressed format");
+
+ *ret_compressed_point = TAKE_PTR(compressed_point);
+ *ret_compressed_point_size = compressed_point_size;
+ return 0;
+}
+#endif
+
+/* Since EC keys doesn't support encryption directly, we use ECDH protocol to derive shared secret here.
+ * We use PKCS#11 C_DeriveKey function to derive a shared secret with a private key stored in the token and
+ * a public key saved on enrollment. */
+static int pkcs11_token_decrypt_data_ecc(
+ CK_FUNCTION_LIST *m,
+ CK_SESSION_HANDLE session,
+ CK_OBJECT_HANDLE object,
+ const void *encrypted_data,
+ size_t encrypted_data_size,
+ void **ret_decrypted_data,
+ size_t *ret_decrypted_data_size) {
+
+ static const CK_BBOOL yes = CK_TRUE, no = CK_FALSE;
+ static const CK_OBJECT_CLASS shared_secret_class = CKO_SECRET_KEY;
+ static const CK_KEY_TYPE shared_secret_type = CKK_GENERIC_SECRET;
+ static const CK_ATTRIBUTE shared_secret_template[] = {
+ { CKA_TOKEN, (void*) &no, sizeof(no) },
+ { CKA_CLASS, (void*) &shared_secret_class, sizeof(shared_secret_class) },
+ { CKA_KEY_TYPE, (void*) &shared_secret_type, sizeof(shared_secret_type) },
+ { CKA_SENSITIVE, (void*) &no, sizeof(no) },
+ { CKA_EXTRACTABLE, (void*) &yes, sizeof(yes) }
+ };
+ CK_ECDH1_DERIVE_PARAMS params = {
+ .kdf = CKD_NULL,
+ .pPublicData = (void*) encrypted_data,
+ .ulPublicDataLen = encrypted_data_size
+ };
+ CK_MECHANISM mechanism = {
+ .mechanism = CKM_ECDH1_DERIVE,
+ .pParameter = &params,
+ .ulParameterLen = sizeof(params)
+ };
+ CK_OBJECT_HANDLE shared_secret_handle;
+ CK_SESSION_INFO session_info;
+ CK_MECHANISM_INFO mechanism_info;
+ CK_RV rv, rv2;
+#if HAVE_OPENSSL
+ _cleanup_free_ void *compressed_point = NULL;
+ int r;
+#endif
+
+ rv = m->C_GetSessionInfo(session, &session_info);
if (rv != CKR_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
- "Failed to initialize object find call: %s", sym_p11_kit_strerror(rv));
+ "Failed to get information about the PKCS#11 session: %s", sym_p11_kit_strerror(rv));
- rv = m->C_FindObjects(session, objects, ELEMENTSOF(objects), &n_objects);
- rv2 = m->C_FindObjectsFinal(session);
+ rv = m->C_GetMechanismInfo(session_info.slotID, CKM_ECDH1_DERIVE, &mechanism_info);
if (rv != CKR_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
- "Failed to find objects: %s", sym_p11_kit_strerror(rv));
+ "Failed to get information about CKM_ECDH1_DERIVE: %s", sym_p11_kit_strerror(rv));
+
+ if (!(mechanism_info.flags & CKF_EC_UNCOMPRESS)) {
+ if (mechanism_info.flags & CKF_EC_COMPRESS) {
+#if HAVE_OPENSSL
+ log_debug("CKM_ECDH1_DERIVE accepts compressed EC points only, trying to convert.");
+ size_t compressed_point_size = 0; /* Explicit initialization to appease gcc */
+ r = ecc_convert_to_compressed(m, session, object, encrypted_data, encrypted_data_size, &compressed_point, &compressed_point_size);
+ if (r < 0)
+ return r;
+
+ params.pPublicData = compressed_point;
+ params.ulPublicDataLen = compressed_point_size;
+#else
+ return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
+ "CKM_ECDH1_DERIVE does not support uncompressed format of EC points");
+#endif
+ } else
+ log_debug("Both CKF_EC_UNCOMPRESS and CKF_EC_COMPRESS are false for CKM_ECDH1_DERIVE, ignoring.");
+ }
+
+ rv = m->C_DeriveKey(session, &mechanism, object, (CK_ATTRIBUTE*) shared_secret_template, ELEMENTSOF(shared_secret_template), &shared_secret_handle);
+ if (rv != CKR_OK)
+ return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to derive a shared secret: %s", sym_p11_kit_strerror(rv));
+
+ CK_ATTRIBUTE shared_secret_attr = { CKA_VALUE, NULL_PTR, 0};
+
+ rv = m->C_GetAttributeValue(session, shared_secret_handle, &shared_secret_attr, 1);
+ if (rv != CKR_OK) {
+ rv2 = m->C_DestroyObject(session, shared_secret_handle);
+ if (rv2 != CKR_OK)
+ log_warning("Failed to destroy a shared secret, ignoring: %s", sym_p11_kit_strerror(rv2));
+ return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to retrieve shared secret length: %s", sym_p11_kit_strerror(rv));
+ }
+
+ shared_secret_attr.pValue = malloc(shared_secret_attr.ulValueLen);
+ if (!shared_secret_attr.pValue)
+ return log_oom();
+
+ rv = m->C_GetAttributeValue(session, shared_secret_handle, &shared_secret_attr, 1);
+ rv2 = m->C_DestroyObject(session, shared_secret_handle);
if (rv2 != CKR_OK)
- return log_error_errno(SYNTHETIC_ERRNO(EIO),
- "Failed to finalize object find call: %s", sym_p11_kit_strerror(rv));
- if (n_objects == 0)
- return log_error_errno(SYNTHETIC_ERRNO(ENOENT),
- "Failed to find selected private key suitable for decryption on token.");
- if (n_objects > 1)
- return log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ),
- "Configured private key URI matches multiple keys, refusing.");
+ log_warning("Failed to destroy a shared secret, ignoring: %s", sym_p11_kit_strerror(rv2));
- *ret_object = objects[0];
+ if (rv != CKR_OK) {
+ erase_and_free(shared_secret_attr.pValue);
+ return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to retrieve a shared secret: %s", sym_p11_kit_strerror(rv));
+ }
+
+ log_info("Successfully derived key with security token.");
+
+ *ret_decrypted_data = shared_secret_attr.pValue;
+ *ret_decrypted_data_size = shared_secret_attr.ulValueLen;
return 0;
}
-int pkcs11_token_decrypt_data(
+static int pkcs11_token_decrypt_data_rsa(
CK_FUNCTION_LIST *m,
CK_SESSION_HANDLE session,
CK_OBJECT_HANDLE object,
@@ -737,17 +1319,6 @@ int pkcs11_token_decrypt_data(
_cleanup_(erase_and_freep) CK_BYTE *dbuffer = NULL;
CK_ULONG dbuffer_size = 0;
CK_RV rv;
- int r;
-
- assert(m);
- assert(encrypted_data);
- assert(encrypted_data_size > 0);
- assert(ret_decrypted_data);
- assert(ret_decrypted_data_size);
-
- r = dlopen_p11kit();
- if (r < 0)
- return r;
rv = m->C_DecryptInit(session, (CK_MECHANISM*) &mechanism, object);
if (rv != CKR_OK)
@@ -780,6 +1351,42 @@ int pkcs11_token_decrypt_data(
return 0;
}
+int pkcs11_token_decrypt_data(
+ CK_FUNCTION_LIST *m,
+ CK_SESSION_HANDLE session,
+ CK_OBJECT_HANDLE object,
+ const void *encrypted_data,
+ size_t encrypted_data_size,
+ void **ret_decrypted_data,
+ size_t *ret_decrypted_data_size) {
+
+ CK_KEY_TYPE key_type;
+ CK_ATTRIBUTE key_type_template = { CKA_KEY_TYPE, &key_type, sizeof(key_type) };
+ CK_RV rv;
+
+ assert(m);
+ assert(encrypted_data);
+ assert(encrypted_data_size > 0);
+ assert(ret_decrypted_data);
+ assert(ret_decrypted_data_size);
+
+ rv = m->C_GetAttributeValue(session, object, &key_type_template, 1);
+ if (rv != CKR_OK)
+ return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to retrieve private key type");
+
+ switch (key_type) {
+
+ case CKK_RSA:
+ return pkcs11_token_decrypt_data_rsa(m, session, object, encrypted_data, encrypted_data_size, ret_decrypted_data, ret_decrypted_data_size);
+
+ case CKK_EC:
+ return pkcs11_token_decrypt_data_ecc(m, session, object, encrypted_data, encrypted_data_size, ret_decrypted_data, ret_decrypted_data_size);
+
+ default:
+ return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Unsupported private key type: %lu", key_type);
+ }
+}
+
int pkcs11_token_acquire_rng(
CK_FUNCTION_LIST *m,
CK_SESSION_HANDLE session) {
@@ -1055,20 +1662,19 @@ int pkcs11_find_token(
}
#if HAVE_OPENSSL
-struct pkcs11_acquire_certificate_callback_data {
+struct pkcs11_acquire_public_key_callback_data {
char *pin_used;
- X509 *cert;
- const char *askpw_friendly_name, *askpw_icon_name;
+ EVP_PKEY *pkey;
+ const char *askpw_friendly_name, *askpw_icon, *askpw_credential;
AskPasswordFlags askpw_flags;
- bool headless;
};
-static void pkcs11_acquire_certificate_callback_data_release(struct pkcs11_acquire_certificate_callback_data *data) {
+static void pkcs11_acquire_public_key_callback_data_release(struct pkcs11_acquire_public_key_callback_data *data) {
erase_and_free(data->pin_used);
- X509_free(data->cert);
+ EVP_PKEY_free(data->pkey);
}
-static int pkcs11_acquire_certificate_callback(
+static int pkcs11_acquire_public_key_callback(
CK_FUNCTION_LIST *m,
CK_SESSION_HANDLE session,
CK_SLOT_ID slot_id,
@@ -1078,8 +1684,16 @@ static int pkcs11_acquire_certificate_callback(
void *userdata) {
_cleanup_(erase_and_freep) char *pin_used = NULL;
- struct pkcs11_acquire_certificate_callback_data *data = ASSERT_PTR(userdata);
- CK_OBJECT_HANDLE object;
+ _cleanup_(EVP_PKEY_freep) EVP_PKEY *pkey = NULL;
+ CK_OBJECT_CLASS class;
+ CK_CERTIFICATE_TYPE type;
+ CK_ATTRIBUTE candidate_attributes[] = {
+ { CKA_CLASS, &class, sizeof(class) },
+ { CKA_CERTIFICATE_TYPE, &type, sizeof(type) },
+ };
+ CK_OBJECT_HANDLE candidate, public_key = CK_INVALID_HANDLE, certificate = CK_INVALID_HANDLE;
+ uint8_t n_public_keys = 0, n_certificates = 0;
+ CK_RV rv;
int r;
assert(m);
@@ -1087,6 +1701,8 @@ static int pkcs11_acquire_certificate_callback(
assert(token_info);
assert(uri);
+ struct pkcs11_acquire_public_key_callback_data *data = ASSERT_PTR(userdata);
+
/* Called for every token matching our URI */
r = pkcs11_token_login(
@@ -1095,50 +1711,154 @@ static int pkcs11_acquire_certificate_callback(
slot_id,
token_info,
data->askpw_friendly_name,
- data->askpw_icon_name,
- "pkcs11-pin",
+ data->askpw_icon,
"pkcs11-pin",
+ data->askpw_credential,
UINT64_MAX,
data->askpw_flags,
- data->headless,
&pin_used);
if (r < 0)
return r;
- r = pkcs11_token_find_x509_certificate(m, session, uri, &object);
- if (r < 0)
- return r;
+ CK_ULONG n_attributes;
+ CK_ATTRIBUTE *attributes = sym_p11_kit_uri_get_attributes(uri, &n_attributes);
+ for (CK_ULONG i = 0; i < n_attributes; i++) {
+ switch (attributes[i].type) {
+ case CKA_CLASS: {
+ CK_OBJECT_CLASS requested_class = *((CK_OBJECT_CLASS*) attributes[i].pValue);
+ if (!IN_SET(requested_class, CKO_PUBLIC_KEY, CKO_CERTIFICATE))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Selected PKCS#11 object is not a public key or certificate, refusing.");
+ break;
+ }
- r = pkcs11_token_read_x509_certificate(m, session, object, &data->cert);
- if (r < 0)
- return r;
+ case CKA_CERTIFICATE_TYPE: {
+ CK_CERTIFICATE_TYPE requested_type = *((CK_CERTIFICATE_TYPE*) attributes[i].pValue);
+ if (requested_type != CKC_X_509)
+ return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Selected PKCS#11 object is not an X.509 certificate, refusing.");
+ break;
+ }}
+ }
+
+ rv = m->C_FindObjectsInit(session, attributes, n_attributes);
+ if (rv != CKR_OK)
+ return log_error_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to initialize object find call: %s", sym_p11_kit_strerror(rv));
+
+ for (;;) {
+ CK_ULONG n;
+ rv = m->C_FindObjects(session, &candidate, 1, &n);
+ if (rv != CKR_OK)
+ return log_error_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to find objects: %s", sym_p11_kit_strerror(rv));
+
+ if (n == 0)
+ break;
+
+ candidate_attributes[0].ulValueLen = sizeof(class);
+ candidate_attributes[1].ulValueLen = sizeof(type);
+ rv = m->C_GetAttributeValue(session, candidate, candidate_attributes, ELEMENTSOF(candidate_attributes));
+ if (!IN_SET(rv, CKR_OK, CKR_ATTRIBUTE_TYPE_INVALID))
+ return log_error_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to get attributes of a selected candidate: %s", sym_p11_kit_strerror(rv));
+
+ if (candidate_attributes[0].ulValueLen == CK_UNAVAILABLE_INFORMATION) {
+ log_debug("Failed to get CKA_CLASS of a selected candidate");
+ continue;
+ }
+
+ if (class == CKO_PUBLIC_KEY) {
+ n_public_keys++;
+ if (n_public_keys > 1)
+ break;
+ public_key = candidate;
+ continue;
+ }
+
+ if (class == CKO_CERTIFICATE) {
+ if (candidate_attributes[1].ulValueLen == CK_UNAVAILABLE_INFORMATION) {
+ log_debug("Failed to get CKA_CERTIFICATE_TYPE of a selected candidate");
+ continue;
+ }
+ if (type != CKC_X_509)
+ continue;
+ n_certificates++;
+ if (n_certificates > 1)
+ break;
+ certificate = candidate;
+ continue;
+ }
+ }
+
+ rv = m->C_FindObjectsFinal(session);
+ if (rv != CKR_OK)
+ return log_error_errno(SYNTHETIC_ERRNO(EIO),
+ "Failed to finalize object find call: %s", sym_p11_kit_strerror(rv));
+
+ if (n_public_keys == 0 && n_certificates == 0)
+ return log_error_errno(SYNTHETIC_ERRNO(ENOENT),
+ "Failed to find selected public key or X.509 certificate.");
+
+ if (n_public_keys > 1)
+ return log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ),
+ "Provided URI matches multiple public keys, refusing.");
+ if (n_certificates > 1)
+ return log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ),
+ "Provided URI matches multiple certificates, refusing.");
+
+ if (n_public_keys != 0) {
+ r = pkcs11_token_read_public_key(m, session, public_key, &pkey);
+ if (r >= 0)
+ goto success;
+ }
+
+ if (n_certificates == 0)
+ return log_error_errno(r, "Failed to read a found public key.");
+
+ {
+ _cleanup_(X509_freep) X509 *cert = NULL;
+
+ r = pkcs11_token_read_x509_certificate(m, session, certificate, &cert);
+ if (r < 0)
+ return log_error_errno(r, "Failed to read a found X.509 certificate.");
+
+ pkey = X509_get_pubkey(cert);
+ if (!pkey)
+ return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to extract public key from X.509 certificate.");
+ }
+success:
/* Let's read some random data off the token and write it to the kernel pool before we generate our
* random key from it. This way we can claim the quality of the RNG is at least as good as the
* kernel's and the token's pool */
(void) pkcs11_token_acquire_rng(m, session);
data->pin_used = TAKE_PTR(pin_used);
- return 1;
+ data->pkey = TAKE_PTR(pkey);
+ return 0;
}
-int pkcs11_acquire_certificate(
+int pkcs11_acquire_public_key(
const char *uri,
const char *askpw_friendly_name,
- const char *askpw_icon_name,
- X509 **ret_cert,
+ const char *askpw_icon,
+ const char *askpw_credential,
+ AskPasswordFlags askpw_flags,
+ EVP_PKEY **ret_pkey,
char **ret_pin_used) {
- _cleanup_(pkcs11_acquire_certificate_callback_data_release) struct pkcs11_acquire_certificate_callback_data data = {
+ _cleanup_(pkcs11_acquire_public_key_callback_data_release) struct pkcs11_acquire_public_key_callback_data data = {
.askpw_friendly_name = askpw_friendly_name,
- .askpw_icon_name = askpw_icon_name,
+ .askpw_icon = askpw_icon,
+ .askpw_credential = askpw_credential,
+ .askpw_flags = askpw_flags,
};
int r;
assert(uri);
- assert(ret_cert);
+ assert(ret_pkey);
- r = pkcs11_find_token(uri, pkcs11_acquire_certificate_callback, &data);
+ r = pkcs11_find_token(uri, pkcs11_acquire_public_key_callback, &data);
if (r == -EAGAIN) /* pkcs11_find_token() doesn't log about this error, but all others */
return log_error_errno(SYNTHETIC_ERRNO(ENXIO),
"Specified PKCS#11 token with URI '%s' not found.",
@@ -1146,11 +1866,9 @@ int pkcs11_acquire_certificate(
if (r < 0)
return r;
- *ret_cert = TAKE_PTR(data.cert);
-
+ *ret_pkey = TAKE_PTR(data.pkey);
if (ret_pin_used)
*ret_pin_used = TAKE_PTR(data.pin_used);
-
return 0;
}
#endif
@@ -1229,7 +1947,7 @@ int pkcs11_list_tokens(void) {
if (r < 0 && r != -EAGAIN)
return r;
- if (table_get_rows(t) <= 1) {
+ if (table_isempty(t)) {
log_info("No suitable PKCS#11 tokens found.");
return 0;
}
@@ -1338,10 +2056,9 @@ int pkcs11_crypt_device_callback(
data->friendly_name,
"drive-harddisk",
"pkcs11-pin",
- "cryptsetup.pkcs11-pin",
+ data->askpw_credential,
data->until,
data->askpw_flags,
- data->headless,
NULL);
if (r < 0)
return r;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-12 17:46:40 +0000