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-rw-r--r--third_party/heimdal/lib/krb5/crypto-des3.c292
1 files changed, 292 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/krb5/crypto-des3.c b/third_party/heimdal/lib/krb5/crypto-des3.c
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+++ b/third_party/heimdal/lib/krb5/crypto-des3.c
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+/*
+ * Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. 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.
+ *
+ * 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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.
+ */
+
+#include "krb5_locl.h"
+
+/*
+ *
+ */
+
+static void
+DES3_random_key(krb5_context context,
+ krb5_keyblock *key)
+{
+ DES_cblock *k = key->keyvalue.data;
+ do {
+ krb5_generate_random_block(k, 3 * sizeof(DES_cblock));
+ DES_set_odd_parity(&k[0]);
+ DES_set_odd_parity(&k[1]);
+ DES_set_odd_parity(&k[2]);
+ } while(DES_is_weak_key(&k[0]) ||
+ DES_is_weak_key(&k[1]) ||
+ DES_is_weak_key(&k[2]));
+}
+
+static krb5_error_code
+DES3_prf(krb5_context context,
+ krb5_crypto crypto,
+ const krb5_data *in,
+ krb5_data *out)
+{
+ struct _krb5_checksum_type *ct = crypto->et->checksum;
+ struct krb5_crypto_iov iov[1];
+ krb5_error_code ret;
+ Checksum result;
+ krb5_keyblock *derived;
+
+ result.cksumtype = ct->type;
+ ret = krb5_data_alloc(&result.checksum, ct->checksumsize);
+ if (ret) {
+ krb5_set_error_message(context, ret, N_("malloc: out memory", ""));
+ return ret;
+ }
+
+ iov[0].data = *in;
+ iov[0].flags = KRB5_CRYPTO_TYPE_DATA;
+ ret = (*ct->checksum)(context, crypto, NULL, 0, iov, 1, &result);
+ if (ret) {
+ krb5_data_free(&result.checksum);
+ return ret;
+ }
+
+ if (result.checksum.length < crypto->et->blocksize)
+ krb5_abortx(context, "internal prf error");
+
+ derived = NULL;
+ ret = krb5_derive_key(context, crypto->key.key,
+ crypto->et->type, "prf", 3, &derived);
+ if (ret)
+ krb5_abortx(context, "krb5_derive_key");
+
+ ret = krb5_data_alloc(out, crypto->et->prf_length);
+ if (ret)
+ krb5_abortx(context, "malloc failed");
+
+ {
+ const EVP_CIPHER *c = (*crypto->et->keytype->evp)();
+ EVP_CIPHER_CTX ctx;
+
+ EVP_CIPHER_CTX_init(&ctx); /* ivec all zero */
+ EVP_CipherInit_ex(&ctx, c, NULL, derived->keyvalue.data, NULL, 1);
+ EVP_Cipher(&ctx, out->data, result.checksum.data,
+ crypto->et->prf_length);
+ EVP_CIPHER_CTX_cleanup(&ctx);
+ }
+
+ krb5_data_free(&result.checksum);
+ krb5_free_keyblock(context, derived);
+
+ return ret;
+}
+
+#ifdef DES3_OLD_ENCTYPE
+static struct _krb5_key_type keytype_des3 = {
+ ETYPE_OLD_DES3_CBC_SHA1,
+ "des3",
+ 168,
+ 24,
+ sizeof(struct _krb5_evp_schedule),
+ DES3_random_key,
+ _krb5_evp_schedule,
+ _krb5_des3_salt,
+ _krb5_DES3_random_to_key,
+ _krb5_evp_cleanup,
+ EVP_des_ede3_cbc
+};
+#endif
+
+static struct _krb5_key_type keytype_des3_derived = {
+ ETYPE_OLD_DES3_CBC_SHA1,
+ "des3",
+ 168,
+ 24,
+ sizeof(struct _krb5_evp_schedule),
+ DES3_random_key,
+ _krb5_evp_schedule,
+ _krb5_des3_salt_derived,
+ _krb5_DES3_random_to_key,
+ _krb5_evp_cleanup,
+ EVP_des_ede3_cbc
+};
+
+#ifdef DES3_OLD_ENCTYPE
+static krb5_error_code
+RSA_MD5_DES3_checksum(krb5_context context,
+ krb5_crypto crypto,
+ struct _krb5_key_data *key,
+ unsigned usage,
+ const struct krb5_crypto_iov *iov,
+ int niov,
+ Checksum *C)
+{
+ return _krb5_des_checksum(context, EVP_md5(), key, iov, niov, C);
+}
+
+static krb5_error_code
+RSA_MD5_DES3_verify(krb5_context context,
+ krb5_crypto crypto,
+ struct _krb5_key_data *key,
+ unsigned usage,
+ const struct krb5_crypto_iov *iov,
+ int niov,
+ Checksum *C)
+{
+ return _krb5_des_verify(context, EVP_md5(), key, iov, niov, C);
+}
+
+struct _krb5_checksum_type _krb5_checksum_rsa_md5_des3 = {
+ CKSUMTYPE_RSA_MD5_DES3,
+ "rsa-md5-des3",
+ 64,
+ 24,
+ F_KEYED | F_CPROOF | F_VARIANT,
+ RSA_MD5_DES3_checksum,
+ RSA_MD5_DES3_verify
+};
+#endif
+
+struct _krb5_checksum_type _krb5_checksum_hmac_sha1_des3 = {
+ CKSUMTYPE_HMAC_SHA1_DES3,
+ "hmac-sha1-des3",
+ 64,
+ 20,
+ F_KEYED | F_CPROOF | F_DERIVED,
+ _krb5_SP_HMAC_SHA1_checksum,
+ NULL
+};
+
+#ifdef DES3_OLD_ENCTYPE
+struct _krb5_encryption_type _krb5_enctype_des3_cbc_md5 = {
+ ETYPE_DES3_CBC_MD5,
+ "des3-cbc-md5",
+ NULL,
+ 8,
+ 8,
+ 8,
+ &keytype_des3,
+ &_krb5_checksum_rsa_md5,
+ &_krb5_checksum_rsa_md5_des3,
+ F_OLD,
+ _krb5_evp_encrypt,
+ _krb5_evp_encrypt_iov,
+ 0,
+ NULL
+};
+#endif
+
+struct _krb5_encryption_type _krb5_enctype_des3_cbc_sha1 = {
+ ETYPE_DES3_CBC_SHA1,
+ "des3-cbc-sha1",
+ NULL,
+ 8,
+ 8,
+ 8,
+ &keytype_des3_derived,
+ &_krb5_checksum_sha1,
+ &_krb5_checksum_hmac_sha1_des3,
+ F_DERIVED | F_RFC3961_ENC | F_RFC3961_KDF | F_OLD,
+ _krb5_evp_encrypt,
+ _krb5_evp_encrypt_iov,
+ 16,
+ DES3_prf
+};
+
+#ifdef DES3_OLD_ENCTYPE
+struct _krb5_encryption_type _krb5_enctype_old_des3_cbc_sha1 = {
+ ETYPE_OLD_DES3_CBC_SHA1,
+ "old-des3-cbc-sha1",
+ NULL,
+ 8,
+ 8,
+ 8,
+ &keytype_des3,
+ &_krb5_checksum_sha1,
+ &_krb5_checksum_hmac_sha1_des3,
+ F_OLD,
+ _krb5_evp_encrypt,
+ _krb5_evp_encrypt_iov,
+ 0,
+ NULL
+};
+#endif
+
+struct _krb5_encryption_type _krb5_enctype_des3_cbc_none = {
+ ETYPE_DES3_CBC_NONE,
+ "des3-cbc-none",
+ NULL,
+ 8,
+ 8,
+ 0,
+ &keytype_des3_derived,
+ &_krb5_checksum_none,
+ NULL,
+ F_PSEUDO | F_OLD,
+ _krb5_evp_encrypt,
+ _krb5_evp_encrypt_iov,
+ 0,
+ NULL
+};
+
+void
+_krb5_DES3_random_to_key(krb5_context context,
+ krb5_keyblock *key,
+ const void *data,
+ size_t size)
+{
+ unsigned char *x = key->keyvalue.data;
+ const u_char *q = data;
+ DES_cblock *k;
+ int i, j;
+
+ memset(key->keyvalue.data, 0, key->keyvalue.length);
+ for (i = 0; i < 3; ++i) {
+ unsigned char foo;
+ for (j = 0; j < 7; ++j) {
+ unsigned char b = q[7 * i + j];
+
+ x[8 * i + j] = b;
+ }
+ foo = 0;
+ for (j = 6; j >= 0; --j) {
+ foo |= q[7 * i + j] & 1;
+ foo <<= 1;
+ }
+ x[8 * i + 7] = foo;
+ }
+ k = key->keyvalue.data;
+ for (i = 0; i < 3; i++) {
+ DES_set_odd_parity(&k[i]);
+ if(DES_is_weak_key(&k[i]))
+ _krb5_xor8(k[i], (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
+ }
+}
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