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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 14:29:10 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 14:29:10 +0000
commit2aa4a82499d4becd2284cdb482213d541b8804dd (patch)
treeb80bf8bf13c3766139fbacc530efd0dd9d54394c /netwerk/srtp/src/crypto/hash
parentInitial commit. (diff)
downloadfirefox-upstream.tar.xz
firefox-upstream.zip
Adding upstream version 86.0.1.upstream/86.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'netwerk/srtp/src/crypto/hash')
-rw-r--r--netwerk/srtp/src/crypto/hash/auth.c187
-rw-r--r--netwerk/srtp/src/crypto/hash/hmac.c283
-rw-r--r--netwerk/srtp/src/crypto/hash/hmac_ossl.c273
-rw-r--r--netwerk/srtp/src/crypto/hash/null_auth.c168
-rw-r--r--netwerk/srtp/src/crypto/hash/sha1.c474
5 files changed, 1385 insertions, 0 deletions
diff --git a/netwerk/srtp/src/crypto/hash/auth.c b/netwerk/srtp/src/crypto/hash/auth.c
new file mode 100644
index 0000000000..f19327dc8e
--- /dev/null
+++ b/netwerk/srtp/src/crypto/hash/auth.c
@@ -0,0 +1,187 @@
+/*
+ * auth.c
+ *
+ * some bookkeeping functions for authentication functions
+ *
+ * David A. McGrew
+ * Cisco Systems, Inc.
+ */
+
+/*
+ *
+ * Copyright (c) 2001-2017, Cisco Systems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * Neither the name of the Cisco Systems, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "auth.h"
+#include "err.h" /* for srtp_debug */
+#include "datatypes.h" /* for octet_string */
+
+/* the debug module for authentiation */
+
+srtp_debug_module_t srtp_mod_auth = {
+ 0, /* debugging is off by default */
+ "auth func" /* printable name for module */
+};
+
+int srtp_auth_get_key_length(const srtp_auth_t *a)
+{
+ return a->key_len;
+}
+
+int srtp_auth_get_tag_length(const srtp_auth_t *a)
+{
+ return a->out_len;
+}
+
+int srtp_auth_get_prefix_length(const srtp_auth_t *a)
+{
+ return a->prefix_len;
+}
+
+/*
+ * srtp_auth_type_test() tests an auth function of type ct against
+ * test cases provided in a list test_data of values of key, data, and tag
+ * that is known to be good
+ */
+
+/* should be big enough for most occasions */
+#define SELF_TEST_TAG_BUF_OCTETS 32
+
+srtp_err_status_t srtp_auth_type_test(const srtp_auth_type_t *at,
+ const srtp_auth_test_case_t *test_data)
+{
+ const srtp_auth_test_case_t *test_case = test_data;
+ srtp_auth_t *a;
+ srtp_err_status_t status;
+ uint8_t tag[SELF_TEST_TAG_BUF_OCTETS];
+ int i, case_num = 0;
+
+ debug_print(srtp_mod_auth, "running self-test for auth function %s",
+ at->description);
+
+ /*
+ * check to make sure that we have at least one test case, and
+ * return an error if we don't - we need to be paranoid here
+ */
+ if (test_case == NULL) {
+ return srtp_err_status_cant_check;
+ }
+
+ /* loop over all test cases */
+ while (test_case != NULL) {
+ /* check test case parameters */
+ if (test_case->tag_length_octets > SELF_TEST_TAG_BUF_OCTETS) {
+ return srtp_err_status_bad_param;
+ }
+
+ /* allocate auth */
+ status = srtp_auth_type_alloc(at, &a, test_case->key_length_octets,
+ test_case->tag_length_octets);
+ if (status) {
+ return status;
+ }
+
+ /* initialize auth */
+ status = srtp_auth_init(a, test_case->key);
+ if (status) {
+ srtp_auth_dealloc(a);
+ return status;
+ }
+
+ /* zeroize tag then compute */
+ octet_string_set_to_zero(tag, test_case->tag_length_octets);
+ status = srtp_auth_compute(a, test_case->data,
+ test_case->data_length_octets, tag);
+ if (status) {
+ srtp_auth_dealloc(a);
+ return status;
+ }
+
+ debug_print(srtp_mod_auth, "key: %s",
+ srtp_octet_string_hex_string(test_case->key,
+ test_case->key_length_octets));
+ debug_print(srtp_mod_auth, "data: %s",
+ srtp_octet_string_hex_string(
+ test_case->data, test_case->data_length_octets));
+ debug_print(
+ srtp_mod_auth, "tag computed: %s",
+ srtp_octet_string_hex_string(tag, test_case->tag_length_octets));
+ debug_print(srtp_mod_auth, "tag expected: %s",
+ srtp_octet_string_hex_string(test_case->tag,
+ test_case->tag_length_octets));
+
+ /* check the result */
+ status = srtp_err_status_ok;
+ for (i = 0; i < test_case->tag_length_octets; i++) {
+ if (tag[i] != test_case->tag[i]) {
+ status = srtp_err_status_algo_fail;
+ debug_print(srtp_mod_auth, "test case %d failed", case_num);
+ debug_print(srtp_mod_auth, " (mismatch at octet %d)", i);
+ }
+ }
+ if (status) {
+ srtp_auth_dealloc(a);
+ return srtp_err_status_algo_fail;
+ }
+
+ /* deallocate the auth function */
+ status = srtp_auth_dealloc(a);
+ if (status) {
+ return status;
+ }
+
+ /*
+ * the auth function passed the test case, so move on to the next test
+ * case in the list; if NULL, we'll quit and return an OK
+ */
+ test_case = test_case->next_test_case;
+ ++case_num;
+ }
+
+ return srtp_err_status_ok;
+}
+
+/*
+ * srtp_auth_type_self_test(at) performs srtp_auth_type_test on at's internal
+ * list of test data.
+ */
+
+srtp_err_status_t srtp_auth_type_self_test(const srtp_auth_type_t *at)
+{
+ return srtp_auth_type_test(at, at->test_data);
+}
diff --git a/netwerk/srtp/src/crypto/hash/hmac.c b/netwerk/srtp/src/crypto/hash/hmac.c
new file mode 100644
index 0000000000..6e91468f36
--- /dev/null
+++ b/netwerk/srtp/src/crypto/hash/hmac.c
@@ -0,0 +1,283 @@
+/*
+ * hmac.c
+ *
+ * implementation of hmac srtp_auth_type_t
+ *
+ * David A. McGrew
+ * Cisco Systems, Inc.
+ */
+/*
+ *
+ * Copyright(c) 2001-2017 Cisco Systems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * Neither the name of the Cisco Systems, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "hmac.h"
+#include "alloc.h"
+#include "cipher_types.h"
+
+/* the debug module for authentiation */
+
+srtp_debug_module_t srtp_mod_hmac = {
+ 0, /* debugging is off by default */
+ "hmac sha-1" /* printable name for module */
+};
+
+static srtp_err_status_t srtp_hmac_alloc(srtp_auth_t **a,
+ int key_len,
+ int out_len)
+{
+ extern const srtp_auth_type_t srtp_hmac;
+ uint8_t *pointer;
+
+ debug_print(srtp_mod_hmac, "allocating auth func with key length %d",
+ key_len);
+ debug_print(srtp_mod_hmac, " tag length %d",
+ out_len);
+
+ /*
+ * check key length - note that we don't support keys larger
+ * than 20 bytes yet
+ */
+ if (key_len > 20) {
+ return srtp_err_status_bad_param;
+ }
+
+ /* check output length - should be less than 20 bytes */
+ if (out_len > 20) {
+ return srtp_err_status_bad_param;
+ }
+
+ /* allocate memory for auth and srtp_hmac_ctx_t structures */
+ pointer = (uint8_t *)srtp_crypto_alloc(sizeof(srtp_hmac_ctx_t) +
+ sizeof(srtp_auth_t));
+ if (pointer == NULL) {
+ return srtp_err_status_alloc_fail;
+ }
+
+ /* set pointers */
+ *a = (srtp_auth_t *)pointer;
+ (*a)->type = &srtp_hmac;
+ (*a)->state = pointer + sizeof(srtp_auth_t);
+ (*a)->out_len = out_len;
+ (*a)->key_len = key_len;
+ (*a)->prefix_len = 0;
+
+ return srtp_err_status_ok;
+}
+
+static srtp_err_status_t srtp_hmac_dealloc(srtp_auth_t *a)
+{
+ /* zeroize entire state*/
+ octet_string_set_to_zero(a, sizeof(srtp_hmac_ctx_t) + sizeof(srtp_auth_t));
+
+ /* free memory */
+ srtp_crypto_free(a);
+
+ return srtp_err_status_ok;
+}
+
+static srtp_err_status_t srtp_hmac_init(void *statev,
+ const uint8_t *key,
+ int key_len)
+{
+ srtp_hmac_ctx_t *state = (srtp_hmac_ctx_t *)statev;
+ int i;
+ uint8_t ipad[64];
+
+ /*
+ * check key length - note that we don't support keys larger
+ * than 20 bytes yet
+ */
+ if (key_len > 20) {
+ return srtp_err_status_bad_param;
+ }
+
+ /*
+ * set values of ipad and opad by exoring the key into the
+ * appropriate constant values
+ */
+ for (i = 0; i < key_len; i++) {
+ ipad[i] = key[i] ^ 0x36;
+ state->opad[i] = key[i] ^ 0x5c;
+ }
+ /* set the rest of ipad, opad to constant values */
+ for (; i < 64; i++) {
+ ipad[i] = 0x36;
+ ((uint8_t *)state->opad)[i] = 0x5c;
+ }
+
+ debug_print(srtp_mod_hmac, "ipad: %s",
+ srtp_octet_string_hex_string(ipad, 64));
+
+ /* initialize sha1 context */
+ srtp_sha1_init(&state->init_ctx);
+
+ /* hash ipad ^ key */
+ srtp_sha1_update(&state->init_ctx, ipad, 64);
+ memcpy(&state->ctx, &state->init_ctx, sizeof(srtp_sha1_ctx_t));
+
+ return srtp_err_status_ok;
+}
+
+static srtp_err_status_t srtp_hmac_start(void *statev)
+{
+ srtp_hmac_ctx_t *state = (srtp_hmac_ctx_t *)statev;
+
+ memcpy(&state->ctx, &state->init_ctx, sizeof(srtp_sha1_ctx_t));
+
+ return srtp_err_status_ok;
+}
+
+static srtp_err_status_t srtp_hmac_update(void *statev,
+ const uint8_t *message,
+ int msg_octets)
+{
+ srtp_hmac_ctx_t *state = (srtp_hmac_ctx_t *)statev;
+
+ debug_print(srtp_mod_hmac, "input: %s",
+ srtp_octet_string_hex_string(message, msg_octets));
+
+ /* hash message into sha1 context */
+ srtp_sha1_update(&state->ctx, message, msg_octets);
+
+ return srtp_err_status_ok;
+}
+
+static srtp_err_status_t srtp_hmac_compute(void *statev,
+ const uint8_t *message,
+ int msg_octets,
+ int tag_len,
+ uint8_t *result)
+{
+ srtp_hmac_ctx_t *state = (srtp_hmac_ctx_t *)statev;
+ uint32_t hash_value[5];
+ uint32_t H[5];
+ int i;
+
+ /* check tag length, return error if we can't provide the value expected */
+ if (tag_len > 20) {
+ return srtp_err_status_bad_param;
+ }
+
+ /* hash message, copy output into H */
+ srtp_hmac_update(state, message, msg_octets);
+ srtp_sha1_final(&state->ctx, H);
+
+ /*
+ * note that we don't need to debug_print() the input, since the
+ * function hmac_update() already did that for us
+ */
+ debug_print(srtp_mod_hmac, "intermediate state: %s",
+ srtp_octet_string_hex_string((uint8_t *)H, 20));
+
+ /* re-initialize hash context */
+ srtp_sha1_init(&state->ctx);
+
+ /* hash opad ^ key */
+ srtp_sha1_update(&state->ctx, (uint8_t *)state->opad, 64);
+
+ /* hash the result of the inner hash */
+ srtp_sha1_update(&state->ctx, (uint8_t *)H, 20);
+
+ /* the result is returned in the array hash_value[] */
+ srtp_sha1_final(&state->ctx, hash_value);
+
+ /* copy hash_value to *result */
+ for (i = 0; i < tag_len; i++) {
+ result[i] = ((uint8_t *)hash_value)[i];
+ }
+
+ debug_print(srtp_mod_hmac, "output: %s",
+ srtp_octet_string_hex_string((uint8_t *)hash_value, tag_len));
+
+ return srtp_err_status_ok;
+}
+
+/* begin test case 0 */
+/* clang-format off */
+static const uint8_t srtp_hmac_test_case_0_key[20] = {
+ 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
+ 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
+ 0x0b, 0x0b, 0x0b, 0x0b
+};
+/* clang-format on */
+
+/* clang-format off */
+static const uint8_t srtp_hmac_test_case_0_data[8] = {
+ 0x48, 0x69, 0x20, 0x54, 0x68, 0x65, 0x72, 0x65 /* "Hi There" */
+};
+/* clang-format on */
+
+/* clang-format off */
+static const uint8_t srtp_hmac_test_case_0_tag[20] = {
+ 0xb6, 0x17, 0x31, 0x86, 0x55, 0x05, 0x72, 0x64,
+ 0xe2, 0x8b, 0xc0, 0xb6, 0xfb, 0x37, 0x8c, 0x8e,
+ 0xf1, 0x46, 0xbe, 0x00
+};
+/* clang-format on */
+
+static const srtp_auth_test_case_t srtp_hmac_test_case_0 = {
+ 20, /* octets in key */
+ srtp_hmac_test_case_0_key, /* key */
+ 8, /* octets in data */
+ srtp_hmac_test_case_0_data, /* data */
+ 20, /* octets in tag */
+ srtp_hmac_test_case_0_tag, /* tag */
+ NULL /* pointer to next testcase */
+};
+
+/* end test case 0 */
+
+static const char srtp_hmac_description[] =
+ "hmac sha-1 authentication function";
+
+/*
+ * srtp_auth_type_t hmac is the hmac metaobject
+ */
+
+const srtp_auth_type_t srtp_hmac = {
+ srtp_hmac_alloc, /* */
+ srtp_hmac_dealloc, /* */
+ srtp_hmac_init, /* */
+ srtp_hmac_compute, /* */
+ srtp_hmac_update, /* */
+ srtp_hmac_start, /* */
+ srtp_hmac_description, /* */
+ &srtp_hmac_test_case_0, /* */
+ SRTP_HMAC_SHA1 /* */
+};
diff --git a/netwerk/srtp/src/crypto/hash/hmac_ossl.c b/netwerk/srtp/src/crypto/hash/hmac_ossl.c
new file mode 100644
index 0000000000..8146438b05
--- /dev/null
+++ b/netwerk/srtp/src/crypto/hash/hmac_ossl.c
@@ -0,0 +1,273 @@
+/*
+ * hmac_ossl.c
+ *
+ * Implementation of hmac srtp_auth_type_t that leverages OpenSSL
+ *
+ * John A. Foley
+ * Cisco Systems, Inc.
+ */
+/*
+ *
+ * Copyright(c) 2013-2017, Cisco Systems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * Neither the name of the Cisco Systems, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "auth.h"
+#include "alloc.h"
+#include "err.h" /* for srtp_debug */
+#include <openssl/evp.h>
+#include <openssl/hmac.h>
+
+#define SHA1_DIGEST_SIZE 20
+
+/* the debug module for authentiation */
+
+srtp_debug_module_t srtp_mod_hmac = {
+ 0, /* debugging is off by default */
+ "hmac sha-1 openssl" /* printable name for module */
+};
+
+static srtp_err_status_t srtp_hmac_alloc(srtp_auth_t **a,
+ int key_len,
+ int out_len)
+{
+ extern const srtp_auth_type_t srtp_hmac;
+
+ debug_print(srtp_mod_hmac, "allocating auth func with key length %d",
+ key_len);
+ debug_print(srtp_mod_hmac, " tag length %d",
+ out_len);
+
+ /* check output length - should be less than 20 bytes */
+ if (out_len > SHA1_DIGEST_SIZE) {
+ return srtp_err_status_bad_param;
+ }
+
+/* OpenSSL 1.1.0 made HMAC_CTX an opaque structure, which must be allocated
+ using HMAC_CTX_new. But this function doesn't exist in OpenSSL 1.0.x. */
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || LIBRESSL_VERSION_NUMBER
+ {
+ /* allocate memory for auth and HMAC_CTX structures */
+ uint8_t *pointer;
+ HMAC_CTX *new_hmac_ctx;
+ pointer = (uint8_t *)srtp_crypto_alloc(sizeof(HMAC_CTX) +
+ sizeof(srtp_auth_t));
+ if (pointer == NULL) {
+ return srtp_err_status_alloc_fail;
+ }
+ *a = (srtp_auth_t *)pointer;
+ (*a)->state = pointer + sizeof(srtp_auth_t);
+ new_hmac_ctx = (HMAC_CTX *)((*a)->state);
+
+ HMAC_CTX_init(new_hmac_ctx);
+ }
+
+#else
+ *a = (srtp_auth_t *)srtp_crypto_alloc(sizeof(srtp_auth_t));
+ if (*a == NULL) {
+ return srtp_err_status_alloc_fail;
+ }
+
+ (*a)->state = HMAC_CTX_new();
+ if ((*a)->state == NULL) {
+ srtp_crypto_free(*a);
+ *a = NULL;
+ return srtp_err_status_alloc_fail;
+ }
+#endif
+
+ /* set pointers */
+ (*a)->type = &srtp_hmac;
+ (*a)->out_len = out_len;
+ (*a)->key_len = key_len;
+ (*a)->prefix_len = 0;
+
+ return srtp_err_status_ok;
+}
+
+static srtp_err_status_t srtp_hmac_dealloc(srtp_auth_t *a)
+{
+ HMAC_CTX *hmac_ctx;
+
+ hmac_ctx = (HMAC_CTX *)a->state;
+
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || LIBRESSL_VERSION_NUMBER
+ HMAC_CTX_cleanup(hmac_ctx);
+
+ /* zeroize entire state*/
+ octet_string_set_to_zero(a, sizeof(HMAC_CTX) + sizeof(srtp_auth_t));
+
+#else
+ HMAC_CTX_free(hmac_ctx);
+
+ /* zeroize entire state*/
+ octet_string_set_to_zero(a, sizeof(srtp_auth_t));
+#endif
+
+ /* free memory */
+ srtp_crypto_free(a);
+
+ return srtp_err_status_ok;
+}
+
+static srtp_err_status_t srtp_hmac_start(void *statev)
+{
+ HMAC_CTX *state = (HMAC_CTX *)statev;
+
+ if (HMAC_Init_ex(state, NULL, 0, NULL, NULL) == 0)
+ return srtp_err_status_auth_fail;
+
+ return srtp_err_status_ok;
+}
+
+static srtp_err_status_t srtp_hmac_init(void *statev,
+ const uint8_t *key,
+ int key_len)
+{
+ HMAC_CTX *state = (HMAC_CTX *)statev;
+
+ if (HMAC_Init_ex(state, key, key_len, EVP_sha1(), NULL) == 0)
+ return srtp_err_status_auth_fail;
+
+ return srtp_err_status_ok;
+}
+
+static srtp_err_status_t srtp_hmac_update(void *statev,
+ const uint8_t *message,
+ int msg_octets)
+{
+ HMAC_CTX *state = (HMAC_CTX *)statev;
+
+ debug_print(srtp_mod_hmac, "input: %s",
+ srtp_octet_string_hex_string(message, msg_octets));
+
+ if (HMAC_Update(state, message, msg_octets) == 0)
+ return srtp_err_status_auth_fail;
+
+ return srtp_err_status_ok;
+}
+
+static srtp_err_status_t srtp_hmac_compute(void *statev,
+ const uint8_t *message,
+ int msg_octets,
+ int tag_len,
+ uint8_t *result)
+{
+ HMAC_CTX *state = (HMAC_CTX *)statev;
+ uint8_t hash_value[SHA1_DIGEST_SIZE];
+ int i;
+ unsigned int len;
+
+ /* check tag length, return error if we can't provide the value expected */
+ if (tag_len > SHA1_DIGEST_SIZE) {
+ return srtp_err_status_bad_param;
+ }
+
+ /* hash message, copy output into H */
+ if (HMAC_Update(state, message, msg_octets) == 0)
+ return srtp_err_status_auth_fail;
+
+ if (HMAC_Final(state, hash_value, &len) == 0)
+ return srtp_err_status_auth_fail;
+
+ if (len < tag_len)
+ return srtp_err_status_auth_fail;
+
+ /* copy hash_value to *result */
+ for (i = 0; i < tag_len; i++) {
+ result[i] = hash_value[i];
+ }
+
+ debug_print(srtp_mod_hmac, "output: %s",
+ srtp_octet_string_hex_string(hash_value, tag_len));
+
+ return srtp_err_status_ok;
+}
+
+/* begin test case 0 */
+/* clang-format off */
+static const uint8_t srtp_hmac_test_case_0_key[SHA1_DIGEST_SIZE] = {
+ 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
+ 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
+ 0x0b, 0x0b, 0x0b, 0x0b
+};
+/* clang-format on */
+
+/* clang-format off */
+static const uint8_t srtp_hmac_test_case_0_data[8] = {
+ 0x48, 0x69, 0x20, 0x54, 0x68, 0x65, 0x72, 0x65 /* "Hi There" */
+};
+/* clang-format on */
+
+/* clang-format off */
+static const uint8_t srtp_hmac_test_case_0_tag[SHA1_DIGEST_SIZE] = {
+ 0xb6, 0x17, 0x31, 0x86, 0x55, 0x05, 0x72, 0x64,
+ 0xe2, 0x8b, 0xc0, 0xb6, 0xfb, 0x37, 0x8c, 0x8e,
+ 0xf1, 0x46, 0xbe, 0x00
+};
+/* clang-format on */
+
+static const srtp_auth_test_case_t srtp_hmac_test_case_0 = {
+ sizeof(srtp_hmac_test_case_0_key), /* octets in key */
+ srtp_hmac_test_case_0_key, /* key */
+ sizeof(srtp_hmac_test_case_0_data), /* octets in data */
+ srtp_hmac_test_case_0_data, /* data */
+ sizeof(srtp_hmac_test_case_0_tag), /* octets in tag */
+ srtp_hmac_test_case_0_tag, /* tag */
+ NULL /* pointer to next testcase */
+};
+
+/* end test case 0 */
+
+static const char srtp_hmac_description[] =
+ "hmac sha-1 authentication function";
+
+/*
+ * srtp_auth_type_t hmac is the hmac metaobject
+ */
+
+const srtp_auth_type_t srtp_hmac = {
+ srtp_hmac_alloc, /* */
+ srtp_hmac_dealloc, /* */
+ srtp_hmac_init, /* */
+ srtp_hmac_compute, /* */
+ srtp_hmac_update, /* */
+ srtp_hmac_start, /* */
+ srtp_hmac_description, /* */
+ &srtp_hmac_test_case_0, /* */
+ SRTP_HMAC_SHA1 /* */
+};
diff --git a/netwerk/srtp/src/crypto/hash/null_auth.c b/netwerk/srtp/src/crypto/hash/null_auth.c
new file mode 100644
index 0000000000..5194417caf
--- /dev/null
+++ b/netwerk/srtp/src/crypto/hash/null_auth.c
@@ -0,0 +1,168 @@
+/*
+ * null_auth.c
+ *
+ * implements the do-nothing auth algorithm
+ *
+ * David A. McGrew
+ * Cisco Systems, Inc.
+ *
+ */
+
+/*
+ *
+ * Copyright (c) 2001-2017, Cisco Systems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * Neither the name of the Cisco Systems, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "null_auth.h"
+#include "err.h" /* for srtp_debug */
+#include "alloc.h"
+#include "cipher_types.h"
+
+static srtp_err_status_t srtp_null_auth_alloc(srtp_auth_t **a,
+ int key_len,
+ int out_len)
+{
+ extern const srtp_auth_type_t srtp_null_auth;
+ uint8_t *pointer;
+
+ debug_print(srtp_mod_auth, "allocating auth func with key length %d",
+ key_len);
+ debug_print(srtp_mod_auth, " tag length %d",
+ out_len);
+
+ /* allocate memory for auth and srtp_null_auth_ctx_t structures */
+ pointer = (uint8_t *)srtp_crypto_alloc(sizeof(srtp_null_auth_ctx_t) +
+ sizeof(srtp_auth_t));
+ if (pointer == NULL) {
+ return srtp_err_status_alloc_fail;
+ }
+
+ /* set pointers */
+ *a = (srtp_auth_t *)pointer;
+ (*a)->type = &srtp_null_auth;
+ (*a)->state = pointer + sizeof(srtp_auth_t);
+ (*a)->out_len = out_len;
+ (*a)->prefix_len = out_len;
+ (*a)->key_len = key_len;
+
+ return srtp_err_status_ok;
+}
+
+static srtp_err_status_t srtp_null_auth_dealloc(srtp_auth_t *a)
+{
+ extern const srtp_auth_type_t srtp_null_auth;
+
+ /* zeroize entire state*/
+ octet_string_set_to_zero(a, sizeof(srtp_null_auth_ctx_t) +
+ sizeof(srtp_auth_t));
+
+ /* free memory */
+ srtp_crypto_free(a);
+
+ return srtp_err_status_ok;
+}
+
+static srtp_err_status_t srtp_null_auth_init(void *statev,
+ const uint8_t *key,
+ int key_len)
+{
+ /* srtp_null_auth_ctx_t *state = (srtp_null_auth_ctx_t *)statev; */
+ /* accept any length of key, and do nothing */
+
+ return srtp_err_status_ok;
+}
+
+static srtp_err_status_t srtp_null_auth_compute(void *statev,
+ const uint8_t *message,
+ int msg_octets,
+ int tag_len,
+ uint8_t *result)
+{
+ /* srtp_null_auth_ctx_t *state = (srtp_null_auth_ctx_t *)statev; */
+
+ return srtp_err_status_ok;
+}
+
+static srtp_err_status_t srtp_null_auth_update(void *statev,
+ const uint8_t *message,
+ int msg_octets)
+{
+ /* srtp_null_auth_ctx_t *state = (srtp_null_auth_ctx_t *)statev; */
+
+ return srtp_err_status_ok;
+}
+
+static srtp_err_status_t srtp_null_auth_start(void *statev)
+{
+ /* srtp_null_auth_ctx_t *state = (srtp_null_auth_ctx_t *)statev; */
+
+ return srtp_err_status_ok;
+}
+
+/*
+ * srtp_auth_type_t - defines description, test case, and null_auth
+ * metaobject
+ */
+
+/* begin test case 0 */
+
+static const srtp_auth_test_case_t srtp_null_auth_test_case_0 = {
+ 0, /* octets in key */
+ NULL, /* key */
+ 0, /* octets in data */
+ NULL, /* data */
+ 0, /* octets in tag */
+ NULL, /* tag */
+ NULL /* pointer to next testcase */
+};
+
+/* end test case 0 */
+
+static const char srtp_null_auth_description[] = "null authentication function";
+
+const srtp_auth_type_t srtp_null_auth = {
+ srtp_null_auth_alloc, /* */
+ srtp_null_auth_dealloc, /* */
+ srtp_null_auth_init, /* */
+ srtp_null_auth_compute, /* */
+ srtp_null_auth_update, /* */
+ srtp_null_auth_start, /* */
+ srtp_null_auth_description, /* */
+ &srtp_null_auth_test_case_0, /* */
+ SRTP_NULL_AUTH /* */
+};
diff --git a/netwerk/srtp/src/crypto/hash/sha1.c b/netwerk/srtp/src/crypto/hash/sha1.c
new file mode 100644
index 0000000000..91ebd1e396
--- /dev/null
+++ b/netwerk/srtp/src/crypto/hash/sha1.c
@@ -0,0 +1,474 @@
+/*
+ * sha1.c
+ *
+ * an implementation of the Secure Hash Algorithm v.1 (SHA-1),
+ * specified in FIPS 180-1
+ *
+ * David A. McGrew
+ * Cisco Systems, Inc.
+ */
+
+/*
+ *
+ * Copyright (c) 2001-2017, Cisco Systems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * Neither the name of the Cisco Systems, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "sha1.h"
+
+srtp_debug_module_t srtp_mod_sha1 = {
+ 0, /* debugging is off by default */
+ "sha-1" /* printable module name */
+};
+
+/* SN == Rotate left N bits */
+#define S1(X) ((X << 1) | (X >> 31))
+#define S5(X) ((X << 5) | (X >> 27))
+#define S30(X) ((X << 30) | (X >> 2))
+
+#define f0(B, C, D) ((B & C) | (~B & D))
+#define f1(B, C, D) (B ^ C ^ D)
+#define f2(B, C, D) ((B & C) | (B & D) | (C & D))
+#define f3(B, C, D) (B ^ C ^ D)
+
+/*
+ * nota bene: the variable K0 appears in the curses library, so we
+ * give longer names to these variables to avoid spurious warnings
+ * on systems that uses curses
+ */
+
+uint32_t SHA_K0 = 0x5A827999; /* Kt for 0 <= t <= 19 */
+uint32_t SHA_K1 = 0x6ED9EBA1; /* Kt for 20 <= t <= 39 */
+uint32_t SHA_K2 = 0x8F1BBCDC; /* Kt for 40 <= t <= 59 */
+uint32_t SHA_K3 = 0xCA62C1D6; /* Kt for 60 <= t <= 79 */
+
+void srtp_sha1(const uint8_t *msg, int octets_in_msg, uint32_t hash_value[5])
+{
+ srtp_sha1_ctx_t ctx;
+
+ srtp_sha1_init(&ctx);
+ srtp_sha1_update(&ctx, msg, octets_in_msg);
+ srtp_sha1_final(&ctx, hash_value);
+}
+
+/*
+ * srtp_sha1_core(M, H) computes the core compression function, where M is
+ * the next part of the message (in network byte order) and H is the
+ * intermediate state { H0, H1, ...} (in host byte order)
+ *
+ * this function does not do any of the padding required in the
+ * complete SHA1 function
+ *
+ * this function is used in the SEAL 3.0 key setup routines
+ * (crypto/cipher/seal.c)
+ */
+
+void srtp_sha1_core(const uint32_t M[16], uint32_t hash_value[5])
+{
+ uint32_t H0;
+ uint32_t H1;
+ uint32_t H2;
+ uint32_t H3;
+ uint32_t H4;
+ uint32_t W[80];
+ uint32_t A, B, C, D, E, TEMP;
+ int t;
+
+ /* copy hash_value into H0, H1, H2, H3, H4 */
+ H0 = hash_value[0];
+ H1 = hash_value[1];
+ H2 = hash_value[2];
+ H3 = hash_value[3];
+ H4 = hash_value[4];
+
+ /* copy/xor message into array */
+
+ W[0] = be32_to_cpu(M[0]);
+ W[1] = be32_to_cpu(M[1]);
+ W[2] = be32_to_cpu(M[2]);
+ W[3] = be32_to_cpu(M[3]);
+ W[4] = be32_to_cpu(M[4]);
+ W[5] = be32_to_cpu(M[5]);
+ W[6] = be32_to_cpu(M[6]);
+ W[7] = be32_to_cpu(M[7]);
+ W[8] = be32_to_cpu(M[8]);
+ W[9] = be32_to_cpu(M[9]);
+ W[10] = be32_to_cpu(M[10]);
+ W[11] = be32_to_cpu(M[11]);
+ W[12] = be32_to_cpu(M[12]);
+ W[13] = be32_to_cpu(M[13]);
+ W[14] = be32_to_cpu(M[14]);
+ W[15] = be32_to_cpu(M[15]);
+ TEMP = W[13] ^ W[8] ^ W[2] ^ W[0];
+ W[16] = S1(TEMP);
+ TEMP = W[14] ^ W[9] ^ W[3] ^ W[1];
+ W[17] = S1(TEMP);
+ TEMP = W[15] ^ W[10] ^ W[4] ^ W[2];
+ W[18] = S1(TEMP);
+ TEMP = W[16] ^ W[11] ^ W[5] ^ W[3];
+ W[19] = S1(TEMP);
+ TEMP = W[17] ^ W[12] ^ W[6] ^ W[4];
+ W[20] = S1(TEMP);
+ TEMP = W[18] ^ W[13] ^ W[7] ^ W[5];
+ W[21] = S1(TEMP);
+ TEMP = W[19] ^ W[14] ^ W[8] ^ W[6];
+ W[22] = S1(TEMP);
+ TEMP = W[20] ^ W[15] ^ W[9] ^ W[7];
+ W[23] = S1(TEMP);
+ TEMP = W[21] ^ W[16] ^ W[10] ^ W[8];
+ W[24] = S1(TEMP);
+ TEMP = W[22] ^ W[17] ^ W[11] ^ W[9];
+ W[25] = S1(TEMP);
+ TEMP = W[23] ^ W[18] ^ W[12] ^ W[10];
+ W[26] = S1(TEMP);
+ TEMP = W[24] ^ W[19] ^ W[13] ^ W[11];
+ W[27] = S1(TEMP);
+ TEMP = W[25] ^ W[20] ^ W[14] ^ W[12];
+ W[28] = S1(TEMP);
+ TEMP = W[26] ^ W[21] ^ W[15] ^ W[13];
+ W[29] = S1(TEMP);
+ TEMP = W[27] ^ W[22] ^ W[16] ^ W[14];
+ W[30] = S1(TEMP);
+ TEMP = W[28] ^ W[23] ^ W[17] ^ W[15];
+ W[31] = S1(TEMP);
+
+ /* process the remainder of the array */
+ for (t = 32; t < 80; t++) {
+ TEMP = W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16];
+ W[t] = S1(TEMP);
+ }
+
+ A = H0;
+ B = H1;
+ C = H2;
+ D = H3;
+ E = H4;
+
+ for (t = 0; t < 20; t++) {
+ TEMP = S5(A) + f0(B, C, D) + E + W[t] + SHA_K0;
+ E = D;
+ D = C;
+ C = S30(B);
+ B = A;
+ A = TEMP;
+ }
+ for (; t < 40; t++) {
+ TEMP = S5(A) + f1(B, C, D) + E + W[t] + SHA_K1;
+ E = D;
+ D = C;
+ C = S30(B);
+ B = A;
+ A = TEMP;
+ }
+ for (; t < 60; t++) {
+ TEMP = S5(A) + f2(B, C, D) + E + W[t] + SHA_K2;
+ E = D;
+ D = C;
+ C = S30(B);
+ B = A;
+ A = TEMP;
+ }
+ for (; t < 80; t++) {
+ TEMP = S5(A) + f3(B, C, D) + E + W[t] + SHA_K3;
+ E = D;
+ D = C;
+ C = S30(B);
+ B = A;
+ A = TEMP;
+ }
+
+ hash_value[0] = H0 + A;
+ hash_value[1] = H1 + B;
+ hash_value[2] = H2 + C;
+ hash_value[3] = H3 + D;
+ hash_value[4] = H4 + E;
+
+ return;
+}
+
+void srtp_sha1_init(srtp_sha1_ctx_t *ctx)
+{
+ /* initialize state vector */
+ ctx->H[0] = 0x67452301;
+ ctx->H[1] = 0xefcdab89;
+ ctx->H[2] = 0x98badcfe;
+ ctx->H[3] = 0x10325476;
+ ctx->H[4] = 0xc3d2e1f0;
+
+ /* indicate that message buffer is empty */
+ ctx->octets_in_buffer = 0;
+
+ /* reset message bit-count to zero */
+ ctx->num_bits_in_msg = 0;
+}
+
+void srtp_sha1_update(srtp_sha1_ctx_t *ctx,
+ const uint8_t *msg,
+ int octets_in_msg)
+{
+ int i;
+ uint8_t *buf = (uint8_t *)ctx->M;
+
+ /* update message bit-count */
+ ctx->num_bits_in_msg += octets_in_msg * 8;
+
+ /* loop over 16-word blocks of M */
+ while (octets_in_msg > 0) {
+ if (octets_in_msg + ctx->octets_in_buffer >= 64) {
+ /*
+ * copy words of M into msg buffer until that buffer is full,
+ * converting them into host byte order as needed
+ */
+ octets_in_msg -= (64 - ctx->octets_in_buffer);
+ for (i = ctx->octets_in_buffer; i < 64; i++) {
+ buf[i] = *msg++;
+ }
+ ctx->octets_in_buffer = 0;
+
+ /* process a whole block */
+
+ debug_print(srtp_mod_sha1, "(update) running srtp_sha1_core()",
+ NULL);
+
+ srtp_sha1_core(ctx->M, ctx->H);
+
+ } else {
+ debug_print(srtp_mod_sha1, "(update) not running srtp_sha1_core()",
+ NULL);
+
+ for (i = ctx->octets_in_buffer;
+ i < (ctx->octets_in_buffer + octets_in_msg); i++) {
+ buf[i] = *msg++;
+ }
+ ctx->octets_in_buffer += octets_in_msg;
+ octets_in_msg = 0;
+ }
+ }
+}
+
+/*
+ * srtp_sha1_final(ctx, output) computes the result for ctx and copies it
+ * into the twenty octets located at *output
+ */
+
+void srtp_sha1_final(srtp_sha1_ctx_t *ctx, uint32_t output[5])
+{
+ uint32_t A, B, C, D, E, TEMP;
+ uint32_t W[80];
+ int i, t;
+
+ /*
+ * process the remaining octets_in_buffer, padding and terminating as
+ * necessary
+ */
+ {
+ int tail = ctx->octets_in_buffer % 4;
+
+ /* copy/xor message into array */
+ for (i = 0; i < (ctx->octets_in_buffer + 3) / 4; i++) {
+ W[i] = be32_to_cpu(ctx->M[i]);
+ }
+
+ /* set the high bit of the octet immediately following the message */
+ switch (tail) {
+ case (3):
+ W[i - 1] = (be32_to_cpu(ctx->M[i - 1]) & 0xffffff00) | 0x80;
+ W[i] = 0x0;
+ break;
+ case (2):
+ W[i - 1] = (be32_to_cpu(ctx->M[i - 1]) & 0xffff0000) | 0x8000;
+ W[i] = 0x0;
+ break;
+ case (1):
+ W[i - 1] = (be32_to_cpu(ctx->M[i - 1]) & 0xff000000) | 0x800000;
+ W[i] = 0x0;
+ break;
+ case (0):
+ W[i] = 0x80000000;
+ break;
+ }
+
+ /* zeroize remaining words */
+ for (i++; i < 15; i++) {
+ W[i] = 0x0;
+ }
+
+ /*
+ * if there is room at the end of the word array, then set the
+ * last word to the bit-length of the message; otherwise, set that
+ * word to zero and then we need to do one more run of the
+ * compression algo.
+ */
+ if (ctx->octets_in_buffer < 56) {
+ W[15] = ctx->num_bits_in_msg;
+ } else if (ctx->octets_in_buffer < 60) {
+ W[15] = 0x0;
+ }
+
+ /* process the word array */
+ for (t = 16; t < 80; t++) {
+ TEMP = W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16];
+ W[t] = S1(TEMP);
+ }
+
+ A = ctx->H[0];
+ B = ctx->H[1];
+ C = ctx->H[2];
+ D = ctx->H[3];
+ E = ctx->H[4];
+
+ for (t = 0; t < 20; t++) {
+ TEMP = S5(A) + f0(B, C, D) + E + W[t] + SHA_K0;
+ E = D;
+ D = C;
+ C = S30(B);
+ B = A;
+ A = TEMP;
+ }
+ for (; t < 40; t++) {
+ TEMP = S5(A) + f1(B, C, D) + E + W[t] + SHA_K1;
+ E = D;
+ D = C;
+ C = S30(B);
+ B = A;
+ A = TEMP;
+ }
+ for (; t < 60; t++) {
+ TEMP = S5(A) + f2(B, C, D) + E + W[t] + SHA_K2;
+ E = D;
+ D = C;
+ C = S30(B);
+ B = A;
+ A = TEMP;
+ }
+ for (; t < 80; t++) {
+ TEMP = S5(A) + f3(B, C, D) + E + W[t] + SHA_K3;
+ E = D;
+ D = C;
+ C = S30(B);
+ B = A;
+ A = TEMP;
+ }
+
+ ctx->H[0] += A;
+ ctx->H[1] += B;
+ ctx->H[2] += C;
+ ctx->H[3] += D;
+ ctx->H[4] += E;
+ }
+
+ debug_print(srtp_mod_sha1, "(final) running srtp_sha1_core()", NULL);
+
+ if (ctx->octets_in_buffer >= 56) {
+ debug_print(srtp_mod_sha1, "(final) running srtp_sha1_core() again",
+ NULL);
+
+ /* we need to do one final run of the compression algo */
+
+ /*
+ * set initial part of word array to zeros, and set the
+ * final part to the number of bits in the message
+ */
+ for (i = 0; i < 15; i++) {
+ W[i] = 0x0;
+ }
+ W[15] = ctx->num_bits_in_msg;
+
+ /* process the word array */
+ for (t = 16; t < 80; t++) {
+ TEMP = W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16];
+ W[t] = S1(TEMP);
+ }
+
+ A = ctx->H[0];
+ B = ctx->H[1];
+ C = ctx->H[2];
+ D = ctx->H[3];
+ E = ctx->H[4];
+
+ for (t = 0; t < 20; t++) {
+ TEMP = S5(A) + f0(B, C, D) + E + W[t] + SHA_K0;
+ E = D;
+ D = C;
+ C = S30(B);
+ B = A;
+ A = TEMP;
+ }
+ for (; t < 40; t++) {
+ TEMP = S5(A) + f1(B, C, D) + E + W[t] + SHA_K1;
+ E = D;
+ D = C;
+ C = S30(B);
+ B = A;
+ A = TEMP;
+ }
+ for (; t < 60; t++) {
+ TEMP = S5(A) + f2(B, C, D) + E + W[t] + SHA_K2;
+ E = D;
+ D = C;
+ C = S30(B);
+ B = A;
+ A = TEMP;
+ }
+ for (; t < 80; t++) {
+ TEMP = S5(A) + f3(B, C, D) + E + W[t] + SHA_K3;
+ E = D;
+ D = C;
+ C = S30(B);
+ B = A;
+ A = TEMP;
+ }
+
+ ctx->H[0] += A;
+ ctx->H[1] += B;
+ ctx->H[2] += C;
+ ctx->H[3] += D;
+ ctx->H[4] += E;
+ }
+
+ /* copy result into output buffer */
+ output[0] = be32_to_cpu(ctx->H[0]);
+ output[1] = be32_to_cpu(ctx->H[1]);
+ output[2] = be32_to_cpu(ctx->H[2]);
+ output[3] = be32_to_cpu(ctx->H[3]);
+ output[4] = be32_to_cpu(ctx->H[4]);
+
+ /* indicate that message buffer in context is empty */
+ ctx->octets_in_buffer = 0;
+
+ return;
+}