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-rw-r--r--src/tests/crypto-tests.c36
-rw-r--r--src/util/crypto/libcrypto/crypto_hmac_sha1.c31
-rw-r--r--src/util/crypto/nss/nss_hmac_sha1.c88
-rw-r--r--src/util/crypto/sss_crypto.h8
4 files changed, 163 insertions, 0 deletions
diff --git a/src/tests/crypto-tests.c b/src/tests/crypto-tests.c
index ba584668..2e792bbd 100644
--- a/src/tests/crypto-tests.c
+++ b/src/tests/crypto-tests.c
@@ -91,6 +91,41 @@ START_TEST(test_encrypt_decrypt)
}
END_TEST
+START_TEST(test_hmac_sha1)
+{
+ const char *message = "test message";
+ const char *keys[] = {
+ "short",
+ "proper6789012345678901234567890123456789012345678901234567890123",
+ "longlonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglong",
+ NULL };
+ const char *results[] = {
+ "\x2b\x27\x53\x07\x17\xd8\xc0\x8f\x97\x27\xdd\xb3\xec\x41\xd8\xa3\x94\x97\xaa\x35",
+ "\x37\xe7\x0a\x6f\x71\x0b\xa9\x93\x81\x53\x8f\x5c\x06\x83\x44\x2f\xc9\x41\xe3\xed",
+ "\xbd\x99\xa7\x7f\xfc\x5e\xde\x04\x32\x7f\x7b\x71\x4d\xc0\x3f\x51\x2d\x25\x01\x28",
+ NULL };
+ unsigned char out[SSS_SHA1_LENGTH];
+ int ret, expected;
+ int i;
+
+#ifdef HAVE_NSS
+ expected = EOK;
+#elif HAVE_LIBCRYPTO
+ expected = ENOSYS;
+#else
+#error Unknown crypto back end
+#endif
+
+ for (i = 0; keys[i]; i++) {
+ ret = sss_hmac_sha1((const unsigned char *)keys[i], strlen(keys[i]),
+ (const unsigned char *)message, strlen(message),
+ out);
+ fail_if(ret != expected);
+ fail_if(ret == EOK && memcmp(out, results[i], SSS_SHA1_LENGTH) != 0);
+ }
+}
+END_TEST
+
Suite *crypto_suite(void)
{
Suite *s = suite_create("sss_crypto");
@@ -102,6 +137,7 @@ Suite *crypto_suite(void)
tcase_add_test(tc, test_nss_init);
#endif
tcase_add_test(tc, test_encrypt_decrypt);
+ tcase_add_test(tc, test_hmac_sha1);
/* Add all test cases to the test suite */
suite_add_tcase(s, tc);
diff --git a/src/util/crypto/libcrypto/crypto_hmac_sha1.c b/src/util/crypto/libcrypto/crypto_hmac_sha1.c
new file mode 100644
index 00000000..32acd25a
--- /dev/null
+++ b/src/util/crypto/libcrypto/crypto_hmac_sha1.c
@@ -0,0 +1,31 @@
+/*
+ Authors:
+ Jan Cholasta <jcholast@redhat.com>
+
+ Copyright (C) 2012 Red Hat
+
+ 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/>.
+*/
+
+#include "util/util.h"
+
+int sss_hmac_sha1(const unsigned char *key,
+ size_t key_len,
+ const unsigned char *in,
+ size_t in_len,
+ unsigned char *out)
+{
+ DEBUG(SSSDBG_CRIT_FAILURE, ("sss_hmac_sha1 not implemented.\n"));
+ return ENOSYS;
+}
diff --git a/src/util/crypto/nss/nss_hmac_sha1.c b/src/util/crypto/nss/nss_hmac_sha1.c
new file mode 100644
index 00000000..6faa09ae
--- /dev/null
+++ b/src/util/crypto/nss/nss_hmac_sha1.c
@@ -0,0 +1,88 @@
+/*
+ Authors:
+ Jan Cholasta <jcholast@redhat.com>
+
+ Copyright (C) 2012 Red Hat
+
+ 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/>.
+*/
+/*
+ NSS does not provide public API for HMAC, so we implement it ourselves.
+
+ See RFC 2104 for details on the algorithm.
+*/
+
+#include "util/util.h"
+#include "util/crypto/sss_crypto.h"
+#include "util/crypto/nss/nss_util.h"
+
+#include <sechash.h>
+
+#define HMAC_SHA1_BLOCKSIZE 64
+
+int sss_hmac_sha1(const unsigned char *key,
+ size_t key_len,
+ const unsigned char *in,
+ size_t in_len,
+ unsigned char *out)
+{
+ int ret;
+ unsigned char ikey[HMAC_SHA1_BLOCKSIZE], okey[HMAC_SHA1_BLOCKSIZE];
+ size_t i;
+ HASHContext *sha1;
+ unsigned char hash[SSS_SHA1_LENGTH];
+ unsigned int res_len;
+
+ ret = nspr_nss_init();
+ if (ret != EOK) {
+ return ret;
+ }
+
+ sha1 = HASH_Create(HASH_AlgSHA1);
+ if (!sha1) {
+ return ENOMEM;
+ }
+
+ if (key_len > HMAC_SHA1_BLOCKSIZE) {
+ /* keys longer than blocksize are shortened */
+ HASH_Begin(sha1);
+ HASH_Update(sha1, key, key_len);
+ HASH_End(sha1, ikey, &res_len, SSS_SHA1_LENGTH);
+ memset(ikey + SSS_SHA1_LENGTH, 0, HMAC_SHA1_BLOCKSIZE - SSS_SHA1_LENGTH);
+ } else {
+ /* keys shorter than blocksize are zero-padded */
+ memcpy(ikey, key, key_len);
+ memset(ikey + key_len, 0, HMAC_SHA1_BLOCKSIZE - key_len);
+ }
+
+ /* HMAC(key, msg) = HASH(key XOR opad, HASH(key XOR ipad, msg)) */
+ for (i = 0; i < HMAC_SHA1_BLOCKSIZE; i++) {
+ okey[i] = ikey[i] ^ 0x5c;
+ ikey[i] ^= 0x36;
+ }
+
+ HASH_Begin(sha1);
+ HASH_Update(sha1, ikey, HMAC_SHA1_BLOCKSIZE);
+ HASH_Update(sha1, in, in_len);
+ HASH_End(sha1, hash, &res_len, SSS_SHA1_LENGTH);
+
+ HASH_Begin(sha1);
+ HASH_Update(sha1, okey, HMAC_SHA1_BLOCKSIZE);
+ HASH_Update(sha1, hash, SSS_SHA1_LENGTH);
+ HASH_End(sha1, out, &res_len, SSS_SHA1_LENGTH);
+
+ HASH_Destroy(sha1);
+
+ return EOK;
+}
diff --git a/src/util/crypto/sss_crypto.h b/src/util/crypto/sss_crypto.h
index 7b3e5e09..5b40ecfc 100644
--- a/src/util/crypto/sss_crypto.h
+++ b/src/util/crypto/sss_crypto.h
@@ -19,6 +19,14 @@ unsigned char *sss_base64_decode(TALLOC_CTX *mem_ctx,
const char *in,
size_t *outsize);
+#define SSS_SHA1_LENGTH 20
+
+int sss_hmac_sha1(const unsigned char *key,
+ size_t key_len,
+ const unsigned char *in,
+ size_t in_len,
+ unsigned char *out);
+
int sss_password_encrypt(TALLOC_CTX *mem_ctx, const char *password, int plen,
enum obfmethod meth, char **obfpwd);
generated by cgit (git 2.34.1) at 2024-11-22 23:43:31 +0000