vendor/heimdal/1.5

1 files changed, 152 insertions, 0 deletions

diff --git a/lib/krb5/crypto-des-common.c b/lib/krb5/crypto-des-common.c
new file mode 100644
index 000000000000..f8313952dc7c
--- /dev/null
+++ b/lib/krb5/crypto-des-common.c
@@ -0,0 +1,152 @@
+/*
+ * 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.
+ */
+
+/* Functions which are used by both single and triple DES enctypes */
+
+#include "krb5_locl.h"
+
+/*
+ * A = A xor B. A & B are 8 bytes.
+ */
+
+void
+_krb5_xor (DES_cblock *key, const unsigned char *b)
+{
+    unsigned char *a = (unsigned char*)key;
+    a[0] ^= b[0];
+    a[1] ^= b[1];
+    a[2] ^= b[2];
+    a[3] ^= b[3];
+    a[4] ^= b[4];
+    a[5] ^= b[5];
+    a[6] ^= b[6];
+    a[7] ^= b[7];
+}
+
+#if defined(DES3_OLD_ENCTYPE) || defined(HEIM_WEAK_CRYPTO)
+krb5_error_code
+_krb5_des_checksum(krb5_context context,
+		   const EVP_MD *evp_md,
+		   struct _krb5_key_data *key,
+		   const void *data,
+		   size_t len,
+		   Checksum *cksum)
+{
+    struct _krb5_evp_schedule *ctx = key->schedule->data;
+    EVP_MD_CTX *m;
+    DES_cblock ivec;
+    unsigned char *p = cksum->checksum.data;
+
+    krb5_generate_random_block(p, 8);
+
+    m = EVP_MD_CTX_create();
+    if (m == NULL) {
+	krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
+	return ENOMEM;
+    }
+
+    EVP_DigestInit_ex(m, evp_md, NULL);
+    EVP_DigestUpdate(m, p, 8);
+    EVP_DigestUpdate(m, data, len);
+    EVP_DigestFinal_ex (m, p + 8, NULL);
+    EVP_MD_CTX_destroy(m);
+    memset (&ivec, 0, sizeof(ivec));
+    EVP_CipherInit_ex(&ctx->ectx, NULL, NULL, NULL, (void *)&ivec, -1);
+    EVP_Cipher(&ctx->ectx, p, p, 24);
+
+    return 0;
+}
+
+krb5_error_code
+_krb5_des_verify(krb5_context context,
+		 const EVP_MD *evp_md,
+		 struct _krb5_key_data *key,
+		 const void *data,
+		 size_t len,
+		 Checksum *C)
+{
+    struct _krb5_evp_schedule *ctx = key->schedule->data;
+    EVP_MD_CTX *m;
+    unsigned char tmp[24];
+    unsigned char res[16];
+    DES_cblock ivec;
+    krb5_error_code ret = 0;
+
+    m = EVP_MD_CTX_create();
+    if (m == NULL) {
+	krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
+	return ENOMEM;
+    }
+
+    memset(&ivec, 0, sizeof(ivec));
+    EVP_CipherInit_ex(&ctx->dctx, NULL, NULL, NULL, (void *)&ivec, -1);
+    EVP_Cipher(&ctx->dctx, tmp, C->checksum.data, 24);
+
+    EVP_DigestInit_ex(m, evp_md, NULL);
+    EVP_DigestUpdate(m, tmp, 8); /* confounder */
+    EVP_DigestUpdate(m, data, len);
+    EVP_DigestFinal_ex (m, res, NULL);
+    EVP_MD_CTX_destroy(m);
+    if(ct_memcmp(res, tmp + 8, sizeof(res)) != 0) {
+	krb5_clear_error_message (context);
+	ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
+    }
+    memset(tmp, 0, sizeof(tmp));
+    memset(res, 0, sizeof(res));
+    return ret;
+}
+
+#endif
+
+static krb5_error_code
+RSA_MD5_checksum(krb5_context context,
+		 struct _krb5_key_data *key,
+		 const void *data,
+		 size_t len,
+		 unsigned usage,
+		 Checksum *C)
+{
+    if (EVP_Digest(data, len, C->checksum.data, NULL, EVP_md5(), NULL) != 1)
+	krb5_abortx(context, "md5 checksum failed");
+    return 0;
+}
+
+struct _krb5_checksum_type _krb5_checksum_rsa_md5 = {
+    CKSUMTYPE_RSA_MD5,
+    "rsa-md5",
+    64,
+    16,
+    F_CPROOF,
+    RSA_MD5_checksum,
+    NULL
+};