From d3c2efc7362f8eeb1cfb22b5d59bdec22226af65 Mon Sep 17 00:00:00 2001

From: Nathaniel McCallum <npmccallum@redhat.com>

Date: Mon, 10 Nov 2014 20:58:20 -0500

Subject: [PATCH] Preliminary refactoring of libotp files

There are no major changes in this commit other than changing filenames

and symbols to have consistent namespaces. This prepares for larger

changes to come in subsequent commits.

Reviewed-By: Thierry Bordaz <tbordaz@redhat.com>

---

 .../ipa-otp-lasttoken/Makefile.am                  |   1 -

 .../ipa-otp-lasttoken/ipa_otp_lasttoken.c          |  10 +-

 .../ipa-slapi-plugins/ipa-pwd-extop/Makefile.am    |   1 -

 daemons/ipa-slapi-plugins/ipa-pwd-extop/ipapwd.h   |   2 +-

 daemons/ipa-slapi-plugins/ipa-pwd-extop/prepost.c  |  12 +-

 daemons/ipa-slapi-plugins/ipa-pwd-extop/syncreq.c  |  11 +-

 daemons/ipa-slapi-plugins/libotp/Makefile.am       |  10 +-

 daemons/ipa-slapi-plugins/libotp/hotp.c            | 170 ++++++

 daemons/ipa-slapi-plugins/libotp/hotp.h            |  60 +++

 daemons/ipa-slapi-plugins/libotp/libotp.c          | 573 ---------------------

 daemons/ipa-slapi-plugins/libotp/libotp.h          |  93 ----

 daemons/ipa-slapi-plugins/libotp/librfc.c          | 170 ------

 daemons/ipa-slapi-plugins/libotp/librfc.h          |  63 ---

 daemons/ipa-slapi-plugins/libotp/otp_token.c       | 572 ++++++++++++++++++++

 daemons/ipa-slapi-plugins/libotp/otp_token.h       |  87 ++++

 daemons/ipa-slapi-plugins/libotp/t_hotp.c          | 121 +++++

 daemons/ipa-slapi-plugins/libotp/t_librfc.c        | 121 -----

 17 files changed, 1033 insertions(+), 1044 deletions(-)

 create mode 100644 daemons/ipa-slapi-plugins/libotp/hotp.c

 create mode 100644 daemons/ipa-slapi-plugins/libotp/hotp.h

 delete mode 100644 daemons/ipa-slapi-plugins/libotp/libotp.c

 delete mode 100644 daemons/ipa-slapi-plugins/libotp/libotp.h

 delete mode 100644 daemons/ipa-slapi-plugins/libotp/librfc.c

 delete mode 100644 daemons/ipa-slapi-plugins/libotp/librfc.h

 create mode 100644 daemons/ipa-slapi-plugins/libotp/otp_token.c

 create mode 100644 daemons/ipa-slapi-plugins/libotp/otp_token.h

 create mode 100644 daemons/ipa-slapi-plugins/libotp/t_hotp.c

 delete mode 100644 daemons/ipa-slapi-plugins/libotp/t_librfc.c

diff --git a/daemons/ipa-slapi-plugins/ipa-otp-lasttoken/Makefile.am b/daemons/ipa-slapi-plugins/ipa-otp-lasttoken/Makefile.am

index d12fbcc891c5f210028b1c02ffbd83908e50acc6..cb6340960818eb4874a70f36603feda93652370f 100644

--- a/daemons/ipa-slapi-plugins/ipa-otp-lasttoken/Makefile.am

+++ b/daemons/ipa-slapi-plugins/ipa-otp-lasttoken/Makefile.am

@@ -3,7 +3,6 @@ PLUGIN_COMMON_DIR = ../common

 AM_CPPFLAGS =							\

 	-I.							\

 	-I$(srcdir)						\

-	-I$(srcdir)/../libotp					\

 	-I$(PLUGIN_COMMON_DIR)					\

 	-I/usr/include/dirsrv					\

 	-DPREFIX=\""$(prefix)"\" 				\

diff --git a/daemons/ipa-slapi-plugins/ipa-otp-lasttoken/ipa_otp_lasttoken.c b/daemons/ipa-slapi-plugins/ipa-otp-lasttoken/ipa_otp_lasttoken.c

index 15b404dcdb6bd88c70ccc7c5fed7a5829483590b..19217ba7fbf562231dd74b25cfd13a0f4d930e7c 100644

--- a/daemons/ipa-slapi-plugins/ipa-otp-lasttoken/ipa_otp_lasttoken.c

+++ b/daemons/ipa-slapi-plugins/ipa-otp-lasttoken/ipa_otp_lasttoken.c

@@ -41,7 +41,7 @@

 #  include <config.h>

 #endif

-#include <libotp.h>

+#include "../libotp/otp_token.h"

 #include <time.h>

 #include "util.h"

@@ -61,7 +61,7 @@ target_is_only_enabled_token(Slapi_PBlock *pb)

 {

     Slapi_DN *target_sdn = NULL;

     Slapi_DN *token_sdn = NULL;

-    struct otptoken **tokens;

+    struct otp_token **tokens;

     char *user_dn = NULL;

     bool match;

@@ -75,10 +75,10 @@ target_is_only_enabled_token(Slapi_PBlock *pb)

         return false;

     /* Get the SDN of the only enabled token. */

-    tokens = otptoken_find(plugin_id, user_dn, NULL, true, NULL);

+    tokens = otp_token_find(plugin_id, user_dn, NULL, true, NULL);

     if (tokens != NULL && tokens[0] != NULL && tokens[1] == NULL)

-        token_sdn = slapi_sdn_dup(otptoken_get_sdn(tokens[0]));

-    otptoken_free_array(tokens);

+        token_sdn = slapi_sdn_dup(otp_token_get_sdn(tokens[0]));

+    otp_token_free_array(tokens);

     if (token_sdn == NULL)

         return false;

diff --git a/daemons/ipa-slapi-plugins/ipa-pwd-extop/Makefile.am b/daemons/ipa-slapi-plugins/ipa-pwd-extop/Makefile.am

index 77beca2da0810ed5507d95b21f99d22f63b05fc1..eeb352611e5b67a2f6803b59414fb31c37f39f33 100644

--- a/daemons/ipa-slapi-plugins/ipa-pwd-extop/Makefile.am

+++ b/daemons/ipa-slapi-plugins/ipa-pwd-extop/Makefile.am

@@ -11,7 +11,6 @@ ASN1_UTIL_DIR=../../../asn1

 AM_CPPFLAGS =							\

 	-I.							\

 	-I$(srcdir)						\

-	-I$(srcdir)/../libotp					\

 	-I$(PLUGIN_COMMON_DIR)					\

 	-I$(KRB5_UTIL_DIR)					\

 	-I$(ASN1_UTIL_DIR)					\

diff --git a/daemons/ipa-slapi-plugins/ipa-pwd-extop/ipapwd.h b/daemons/ipa-slapi-plugins/ipa-pwd-extop/ipapwd.h

index f8851122b920bb8317d5d6b74915504a98a674cf..2e9d4fe86b34c64731728882db7c81e3871d7d07 100644

--- a/daemons/ipa-slapi-plugins/ipa-pwd-extop/ipapwd.h

+++ b/daemons/ipa-slapi-plugins/ipa-pwd-extop/ipapwd.h

@@ -41,7 +41,7 @@

 #  include <config.h>

 #endif

-#include <libotp.h>

+#include "../libotp/otp_token.h"

 #include <stdio.h>

 #include <string.h>

diff --git a/daemons/ipa-slapi-plugins/ipa-pwd-extop/prepost.c b/daemons/ipa-slapi-plugins/ipa-pwd-extop/prepost.c

index 1f595d01d986ca2950672d796d62f5f78b05c212..1dff6db1a8cfcc295ba43d1c29d8887e3cf37fec 100644

--- a/daemons/ipa-slapi-plugins/ipa-pwd-extop/prepost.c

+++ b/daemons/ipa-slapi-plugins/ipa-pwd-extop/prepost.c

@@ -1140,11 +1140,11 @@ done:

 static bool ipapwd_do_otp_auth(const char *dn, Slapi_Entry *bind_entry,

                                struct berval *creds)

 {

-    struct otptoken **tokens = NULL;

+    struct otp_token **tokens = NULL;

     bool success = false;

     /* Find all of the user's active tokens. */

-    tokens = otptoken_find(ipapwd_plugin_id, dn, NULL, true, NULL);

+    tokens = otp_token_find(ipapwd_plugin_id, dn, NULL, true, NULL);

     if (tokens == NULL) {

         slapi_log_error(SLAPI_LOG_FATAL, IPAPWD_PLUGIN_NAME,

                         "%s: can't find tokens for '%s'.\n", __func__, dn);

@@ -1157,12 +1157,12 @@ static bool ipapwd_do_otp_auth(const char *dn, Slapi_Entry *bind_entry,

     /* Loop through each token. */

     for (int i = 0; tokens[i] && !success; i++) {

         /* Attempt authentication. */

-        success = otptoken_validate_berval(tokens[i], OTP_VALIDATE_STEPS,

+        success = otp_token_validate_berval(tokens[i], OTP_VALIDATE_STEPS,

                                            creds, true);

         /* Truncate the password to remove the OTP code at the end. */

         if (success) {

-            creds->bv_len -= otptoken_get_digits(tokens[i]);

+            creds->bv_len -= otp_token_get_digits(tokens[i]);

             creds->bv_val[creds->bv_len] = '\0';

         }

@@ -1170,10 +1170,10 @@ static bool ipapwd_do_otp_auth(const char *dn, Slapi_Entry *bind_entry,

                         "%s: token authentication %s "

                         "(user: '%s', token: '%s\').\n", __func__,

                         success ? "succeeded" : "failed", dn,

-                        slapi_sdn_get_ndn(otptoken_get_sdn(tokens[i])));

+                        slapi_sdn_get_ndn(otp_token_get_sdn(tokens[i])));

     }

-    otptoken_free_array(tokens);

+    otp_token_free_array(tokens);

     return success;

 }

diff --git a/daemons/ipa-slapi-plugins/ipa-pwd-extop/syncreq.c b/daemons/ipa-slapi-plugins/ipa-pwd-extop/syncreq.c

index cbb4536e7d119f4550e4b523eb02e34d058ae7a1..10c49b724ee276d2b1fb89891a6eb4ee8eaa8fab 100644

--- a/daemons/ipa-slapi-plugins/ipa-pwd-extop/syncreq.c

+++ b/daemons/ipa-slapi-plugins/ipa-pwd-extop/syncreq.c

@@ -37,8 +37,7 @@

  * All rights reserved.

  * END COPYRIGHT BLOCK **/

-

-#include <libotp.h>

+#include "../libotp/otp_token.h"

 #include "syncreq.h"

 #define OTP_SYNC_MAX_STEPS 25

@@ -56,7 +55,7 @@ bool sync_request_present(Slapi_PBlock *pb)

 bool sync_request_handle(Slapi_ComponentId *plugin_id, Slapi_PBlock *pb,

                          const char *user_dn)

 {

-    struct otptoken **tokens = NULL;

+    struct otp_token **tokens = NULL;

     LDAPControl **controls = NULL;

     struct berval *second = NULL;

     struct berval *first = NULL;

@@ -91,10 +90,10 @@ bool sync_request_handle(Slapi_ComponentId *plugin_id, Slapi_PBlock *pb,

         /* Process the synchronization. */

         success = false;

         if (ber_scanf(ber, "}") != LBER_ERROR) {

-            tokens = otptoken_find(plugin_id, user_dn, token_dn, true, NULL);

+            tokens = otp_token_find(plugin_id, user_dn, token_dn, true, NULL);

             if (tokens != NULL) {

-                success = otptoken_sync_berval(tokens, OTP_SYNC_MAX_STEPS, first, second);

-                otptoken_free_array(tokens);

+                success = otp_token_sync_berval(tokens, OTP_SYNC_MAX_STEPS, first, second);

+                otp_token_free_array(tokens);

             }

         }

diff --git a/daemons/ipa-slapi-plugins/libotp/Makefile.am b/daemons/ipa-slapi-plugins/libotp/Makefile.am

index 6aa60c56a2293916ba7c1d773968055c3f94a4fe..012c8339199af5f63e6434b94109af2d93a38b45 100644

--- a/daemons/ipa-slapi-plugins/libotp/Makefile.am

+++ b/daemons/ipa-slapi-plugins/libotp/Makefile.am

@@ -1,9 +1,11 @@

 MAINTAINERCLEANFILES = *~ Makefile.in

 AM_CPPFLAGS = -I/usr/include/dirsrv

-noinst_LTLIBRARIES = librfc.la libotp.la

-libotp_la_LIBADD = librfc.la

+noinst_LTLIBRARIES = libhotp.la libotp.la

+libhotp_la_SOURCES = hotp.c hotp.h

+libotp_la_SOURCES = otp_token.c otp_token.h

+libotp_la_LIBADD = libhotp.la

-check_PROGRAMS = t_librfc

+check_PROGRAMS = t_hotp

 TESTS = $(check_PROGRAMS)

-t_librfc_LDADD = $(NSPR_LIBS) $(NSS_LIBS) librfc.la

+t_hotp_LDADD = $(NSPR_LIBS) $(NSS_LIBS) libhotp.la

diff --git a/daemons/ipa-slapi-plugins/libotp/hotp.c b/daemons/ipa-slapi-plugins/libotp/hotp.c

new file mode 100644

index 0000000000000000000000000000000000000000..619bc63ab1bee99d71c2f0fb887809762107c94c

--- /dev/null

+++ b/daemons/ipa-slapi-plugins/libotp/hotp.c

@@ -0,0 +1,170 @@

+/** BEGIN COPYRIGHT BLOCK

+ * This program is free software; you can redistribute it and/or modify

+ * it under the terms of the GNU General Public License as published by

+ * the Free Software Foundation, either version 3 of the License, or

+ * (at your option) any later version.

+ *

+ * This program is distributed in the hope that it will be useful,

+ * but WITHOUT ANY WARRANTY; without even the implied warranty of

+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

+ * GNU General Public License for more details.

+ *

+ * You should have received a copy of the GNU General Public License

+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.

+ *

+ * Additional permission under GPLv3 section 7:

+ *

+ * In the following paragraph, "GPL" means the GNU General Public

+ * License, version 3 or any later version, and "Non-GPL Code" means

+ * code that is governed neither by the GPL nor a license

+ * compatible with the GPL.

+ *

+ * You may link the code of this Program with Non-GPL Code and convey

+ * linked combinations including the two, provided that such Non-GPL

+ * Code only links to the code of this Program through those well

+ * defined interfaces identified in the file named EXCEPTION found in

+ * the source code files (the "Approved Interfaces"). The files of

+ * Non-GPL Code may instantiate templates or use macros or inline

+ * functions from the Approved Interfaces without causing the resulting

+ * work to be covered by the GPL. Only the copyright holders of this

+ * Program may make changes or additions to the list of Approved

+ * Interfaces.

+ *

+ * Authors:

+ * Nathaniel McCallum <npmccallum@redhat.com>

+ *

+ * Copyright (C) 2013 Red Hat, Inc.

+ * All rights reserved.

+ * END COPYRIGHT BLOCK **/

+

+/*

+ * This file contains an implementation of HOTP (RFC 4226) and TOTP (RFC 6238).

+ * For details of how these algorithms work, please see the relevant RFCs.

+ */

+

+#include "hotp.h"

+#include <time.h>

+

+#include <nss.h>

+#include <pk11pub.h>

+#include <hasht.h>

+#include <prnetdb.h>

+

+struct digest_buffer {

+    uint8_t buf[SHA512_LENGTH];

+    unsigned int len;

+};

+

+static const struct {

+    const char *algo;

+    CK_MECHANISM_TYPE mech;

+} algo2mech[] = {

+    { "sha1",   CKM_SHA_1_HMAC },

+    { "sha256", CKM_SHA256_HMAC },

+    { "sha384", CKM_SHA384_HMAC },

+    { "sha512", CKM_SHA512_HMAC },

+    { }

+};

+

+/*

+ * This code is mostly cargo-cult taken from here:

+ *   http://www.mozilla.org/projects/security/pki/nss/tech-notes/tn5.html

+ *

+ * It should implement HMAC with the given mechanism (SHA: 1, 256, 384, 512).

+ */

+static bool hmac(SECItem *key, CK_MECHANISM_TYPE mech, const SECItem *in,

+                 struct digest_buffer *out)

+{

+    SECItem param = { siBuffer, NULL, 0 };

+    PK11SlotInfo *slot = NULL;

+    PK11SymKey *symkey = NULL;

+    PK11Context *ctx = NULL;

+    bool ret = false;

+    SECStatus s;

+

+    slot = PK11_GetBestSlot(mech, NULL);

+    if (slot == NULL) {

+        slot = PK11_GetInternalKeySlot();

+        if (slot == NULL) {

+            goto done;

+        }

+    }

+

+    symkey = PK11_ImportSymKey(slot, mech, PK11_OriginUnwrap,

+                               CKA_SIGN, key, NULL);

+    if (symkey == NULL)

+        goto done;

+

+    ctx = PK11_CreateContextBySymKey(mech, CKA_SIGN, symkey, ¶m;;

+    if (ctx == NULL)

+        goto done;

+

+    s = PK11_DigestBegin(ctx);

+    if (s != SECSuccess)

+        goto done;

+

+    s = PK11_DigestOp(ctx, in->data, in->len);

+    if (s != SECSuccess)

+        goto done;

+

+    s = PK11_DigestFinal(ctx, out->buf, &out->len, sizeof(out->buf));

+    if (s != SECSuccess)

+        goto done;

+

+    ret = true;

+

+done:

+    if (ctx != NULL)

+        PK11_DestroyContext(ctx, PR_TRUE);

+    if (symkey != NULL)

+        PK11_FreeSymKey(symkey);

+    if (slot != NULL)

+        PK11_FreeSlot(slot);

+    return ret;

+}

+

+/*

+ * An implementation of HOTP (RFC 4226).

+ */

+bool hotp(const struct hotp_token *token, uint64_t counter, uint32_t *out)

+{

+    const SECItem cntr = { siBuffer, (uint8_t *) &counter, sizeof(counter) };

+    SECItem keyitm = { siBuffer, token->key.bytes, token->key.len };

+    CK_MECHANISM_TYPE mech = CKM_SHA_1_HMAC;

+    PRUint64 offset, binary, div;

+    struct digest_buffer digest;

+    int digits = token->digits;

+    int i;

+

+    /* Convert counter to network byte order. */

+    counter = PR_htonll(counter);

+

+    /* Find the mech. */

+    for (i = 0; algo2mech[i].algo; i++) {

+        if (strcasecmp(algo2mech[i].algo, token->algo) == 0) {

+            mech = algo2mech[i].mech;

+            break;

+        }

+    }

+

+    /* Create the digits divisor. */

+    for (div = 1; digits > 0; digits--) {

+        div *= 10;

+    }

+

+    /* Do the digest. */

+    if (!hmac(&keyitm, mech, &cntr, &digest)) {

+        return false;

+    }

+

+    /* Truncate. */

+    offset  = digest.buf[digest.len - 1] & 0xf;

+    binary  = (digest.buf[offset + 0] & 0x7f) << 0x18;

+    binary |= (digest.buf[offset + 1] & 0xff) << 0x10;

+    binary |= (digest.buf[offset + 2] & 0xff) << 0x08;

+    binary |= (digest.buf[offset + 3] & 0xff) << 0x00;

+    binary  = binary % div;

+

+    *out = binary;

+    return true;

+}

diff --git a/daemons/ipa-slapi-plugins/libotp/hotp.h b/daemons/ipa-slapi-plugins/libotp/hotp.h

new file mode 100644

index 0000000000000000000000000000000000000000..06ae1fdae86df4ab124839cd62b61d99d908789a

--- /dev/null

+++ b/daemons/ipa-slapi-plugins/libotp/hotp.h

@@ -0,0 +1,60 @@

+/** BEGIN COPYRIGHT BLOCK

+ * This program is free software; you can redistribute it and/or modify

+ * it under the terms of the GNU General Public License as published by

+ * the Free Software Foundation, either version 3 of the License, or

+ * (at your option) any later version.

+ *

+ * This program is distributed in the hope that it will be useful,

+ * but WITHOUT ANY WARRANTY; without even the implied warranty of

+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

+ * GNU General Public License for more details.

+ *

+ * You should have received a copy of the GNU General Public License

+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.

+ *

+ * Additional permission under GPLv3 section 7:

+ *

+ * In the following paragraph, "GPL" means the GNU General Public

+ * License, version 3 or any later version, and "Non-GPL Code" means

+ * code that is governed neither by the GPL nor a license

+ * compatible with the GPL.

+ *

+ * You may link the code of this Program with Non-GPL Code and convey

+ * linked combinations including the two, provided that such Non-GPL

+ * Code only links to the code of this Program through those well

+ * defined interfaces identified in the file named EXCEPTION found in

+ * the source code files (the "Approved Interfaces"). The files of

+ * Non-GPL Code may instantiate templates or use macros or inline

+ * functions from the Approved Interfaces without causing the resulting

+ * work to be covered by the GPL. Only the copyright holders of this

+ * Program may make changes or additions to the list of Approved

+ * Interfaces.

+ *

+ * Authors:

+ * Nathaniel McCallum <npmccallum@redhat.com>

+ *

+ * Copyright (C) 2013 Red Hat, Inc.

+ * All rights reserved.

+ * END COPYRIGHT BLOCK **/

+

+#pragma once

+

+#include <stdbool.h>

+#include <stdint.h>

+#include <stdlib.h>

+

+struct hotp_token_key {

+    uint8_t *bytes;

+    size_t len;

+};

+

+struct hotp_token {

+    struct hotp_token_key key;

+    char *algo;

+    int digits;

+};

+

+/*

+ * An implementation of HOTP (RFC 4226).

+ */

+bool hotp(const struct hotp_token *token, uint64_t counter, uint32_t *out);

diff --git a/daemons/ipa-slapi-plugins/libotp/libotp.c b/daemons/ipa-slapi-plugins/libotp/libotp.c

deleted file mode 100644

index c65aef04348da5abdb1eeb6267e785f0342c7d51..0000000000000000000000000000000000000000

--- a/daemons/ipa-slapi-plugins/libotp/libotp.c

+++ /dev/null

@@ -1,573 +0,0 @@

-/** BEGIN COPYRIGHT BLOCK

- * This program is free software; you can redistribute it and/or modify

- * it under the terms of the GNU General Public License as published by

- * the Free Software Foundation, either version 3 of the License, or

- * (at your option) any later version.

- *

- * This program is distributed in the hope that it will be useful,

- * but WITHOUT ANY WARRANTY; without even the implied warranty of

- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

- * GNU General Public License for more details.

- *

- * You should have received a copy of the GNU General Public License

- * along with this program.  If not, see <http://www.gnu.org/licenses/>.

- *

- * Additional permission under GPLv3 section 7:

- *

- * In the following paragraph, "GPL" means the GNU General Public

- * License, version 3 or any later version, and "Non-GPL Code" means

- * code that is governed neither by the GPL nor a license

- * compatible with the GPL.

- *

- * You may link the code of this Program with Non-GPL Code and convey

- * linked combinations including the two, provided that such Non-GPL

- * Code only links to the code of this Program through those well

- * defined interfaces identified in the file named EXCEPTION found in

- * the source code files (the "Approved Interfaces"). The files of

- * Non-GPL Code may instantiate templates or use macros or inline

- * functions from the Approved Interfaces without causing the resulting

- * work to be covered by the GPL. Only the copyright holders of this

- * Program may make changes or additions to the list of Approved

- * Interfaces.

- *

- * Authors:

- * Nathaniel McCallum <npmccallum@redhat.com>

- *

- * Copyright (C) 2013 Red Hat, Inc.

- * All rights reserved.

- * END COPYRIGHT BLOCK **/

-

-#include "libotp.h"

-#include "librfc.h"

-

-#include <time.h>

-#include <errno.h>

-

-#define TOKEN(s) "ipaToken" s

-#define O(s) TOKEN("OTP" s)

-#define T(s) TOKEN("TOTP" s)

-#define H(s) TOKEN("HOTP" s)

-

-#define IPA_OTP_DEFAULT_TOKEN_STEP 30

-#define IPA_OTP_OBJCLS_FILTER \

-    "(|(objectClass=ipaTokenTOTP)(objectClass=ipaTokenHOTP))"

-

-

-enum otptoken_type {

-    OTPTOKEN_NONE = 0,

-    OTPTOKEN_TOTP,

-    OTPTOKEN_HOTP,

-};

-

-struct otptoken {

-    Slapi_ComponentId *plugin_id;

-    Slapi_DN *sdn;

-    struct hotp_token token;

-    enum otptoken_type type;

-    union {

-        struct {

-            uint64_t watermark;

-            unsigned int step;

-            int offset;

-        } totp;

-        struct {

-            uint64_t counter;

-        } hotp;

-    };

-};

-

-static const char *get_basedn(Slapi_DN *dn)

-{

-    Slapi_DN *suffix = NULL;

-    void *node = NULL;

-

-    for (suffix = slapi_get_first_suffix(&node, 0);

-         suffix != NULL;

-         suffix = slapi_get_next_suffix(&node, 0)) {

-        if (slapi_sdn_issuffix(dn, suffix))

-            return (char *) slapi_sdn_get_dn(suffix);

-    }

-

-    return NULL;

-}

-

-static inline bool is_algo_valid(const char *algo)

-{

-    static const char *valid_algos[] = { "sha1", "sha256", "sha384",

-                                         "sha512", NULL };

-    int i, ret;

-

-    for (i = 0; valid_algos[i]; i++) {

-        ret = strcasecmp(algo, valid_algos[i]);

-        if (ret == 0)

-            return true;

-    }

-

-    return false;

-}

-

-static const struct berval *entry_attr_get_berval(const Slapi_Entry* e,

-                                                  const char *type)

-{

-    Slapi_Attr* attr = NULL;

-    Slapi_Value *v;

-    int ret;

-

-    ret = slapi_entry_attr_find(e, type, &attr);

-    if (ret != 0 || attr == NULL)

-        return NULL;

-

-    ret = slapi_attr_first_value(attr, &v);

-    if (ret < 0)

-        return NULL;

-

-    return slapi_value_get_berval(v);

-}

-

-static bool writeattr(const struct otptoken *token, const char *attr,

-                      long long val)

-{

-    Slapi_PBlock *pb = NULL;

-    bool success = false;

-    char value[32];

-    int ret;

-

-    LDAPMod *mods[] = {

-        &(LDAPMod) {

-            LDAP_MOD_REPLACE, (char *) attr,

-            .mod_values = (char *[]) { value, NULL }

-        },

-        NULL

-    };

-

-    snprintf(value, sizeof(value), "%lld", val);

-

-    pb = slapi_pblock_new();

-    slapi_modify_internal_set_pb(pb, slapi_sdn_get_dn(token->sdn),

-                                 mods, NULL, NULL, token->plugin_id, 0);

-    if (slapi_modify_internal_pb(pb) != 0)

-        goto error;

-    if (slapi_pblock_get(pb, SLAPI_PLUGIN_INTOP_RESULT, &ret) != 0)

-        goto error;

-    if (ret != LDAP_SUCCESS)

-        goto error;

-

-    success = true;

-

-error:

-    slapi_pblock_destroy(pb);

-    return success;

-}

-

-/**

- * Validate a token.

- *

- * If the second token code is specified, perform synchronization.

- */

-static bool validate(struct otptoken *token, time_t now, ssize_t step,

-                     uint32_t first, const uint32_t *second)

-{

-    const char *attr;

-    uint32_t tmp;

-

-    /* Calculate the absolute step. */

-    switch (token->type) {

-    case OTPTOKEN_TOTP:

-        attr = T("watermark");

-        step = (now + token->totp.offset) / token->totp.step + step;

-        if (token->totp.watermark > 0 && step < token->totp.watermark)

-            return false;

-        break;

-    case OTPTOKEN_HOTP:

-        if (step < 0) /* NEVER go backwards! */

-            return false;

-        attr = H("counter");

-        step = token->hotp.counter + step;

-        break;

-    default:

-        return false;

-    }

-

-    /* Validate the first code. */

-    if (!hotp(&token->token, step++, &tmp))

-        return false;

-

-    if (first != tmp)

-        return false;

-

-    /* Validate the second code if specified. */

-    if (second != NULL) {

-        if (!hotp(&token->token, step++, &tmp))

-            return false;

-

-        if (*second != tmp)

-            return false;

-    }

-

-    /* Write the step value. */

-    if (!writeattr(token, attr, step))

-        return false;

-

-    /* Save our modifications to the object. */

-    switch (token->type) {

-    case OTPTOKEN_TOTP:

-        /* Perform optional synchronization steps. */

-        if (second != NULL) {

-            tmp = (step - now / token->totp.step) * token->totp.step;

-            if (!writeattr(token, T("clockOffset"), tmp))

-                return false;

-            token->totp.offset = tmp;

-        }

-        token->totp.watermark = step;

-        break;

-    case OTPTOKEN_HOTP:

-        token->hotp.counter = step;

-        break;

-    default:

-        break;

-    }

-

-    return true;

-}

-

-

-static void otptoken_free(struct otptoken *token)

-{

-    if (token == NULL)

-        return;

-

-    slapi_sdn_free(&token->sdn);

-    free(token->token.key.bytes);

-    slapi_ch_free_string(&token->token.algo);

-    free(token);

-}

-

-void otptoken_free_array(struct otptoken **tokens)

-{

-    if (tokens == NULL)

-        return;

-

-    for (size_t i = 0; tokens[i] != NULL; i++)

-        otptoken_free(tokens[i]);

-

-    free(tokens);

-}

-