Crypto modularity proj: Separate files under crypto directory based on their functionality. Move Kerberos specific files into krb subdir and MIT specific - into builtin subdir. Place all tests into crypto_tests subfolder.

bigredbutton: whitespace

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@22477 dc483132-0cff-0310-8789-dd5450dbe970

1 files changed, 168 insertions, 0 deletions

diff --git a/src/lib/crypto/krb/dk/checksum.c b/src/lib/crypto/krb/dk/checksum.c
new file mode 100644
index 0000000..f4b18bf
--- /dev/null
+++ b/src/lib/crypto/krb/dk/checksum.c
@@ -0,0 +1,168 @@
+/*
+ * Copyright (C) 1998 by the FundsXpress, INC.
+ * 
+ * All rights reserved.
+ * 
+ * Export of this software from the United States of America may require
+ * a specific license from the United States Government.  It is the
+ * responsibility of any person or organization contemplating export to
+ * obtain such a license before exporting.
+ * 
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of FundsXpress. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  FundsXpress makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ * 
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include "k5-int.h"
+#include "etypes.h"
+#include "dk.h"
+#include "aead.h"
+
+#define K5CLENGTH 5 /* 32 bit net byte order integer + one byte seed */
+
+krb5_error_code
+krb5_dk_make_checksum(const struct krb5_hash_provider *hash,
+		      const krb5_keyblock *key, krb5_keyusage usage,
+		      const krb5_data *input, krb5_data *output)
+{
+    int i;
+    const struct krb5_enc_provider *enc;
+    size_t blocksize, keybytes, keylength;
+    krb5_error_code ret;
+    unsigned char constantdata[K5CLENGTH];
+    krb5_data datain;
+    unsigned char *kcdata;
+    krb5_keyblock kc;
+
+    for (i=0; i<krb5_enctypes_length; i++) {
+	if (krb5_enctypes_list[i].etype == key->enctype)
+	    break;
+    }
+
+    if (i == krb5_enctypes_length)
+	return(KRB5_BAD_ENCTYPE);
+
+    enc = krb5_enctypes_list[i].enc;
+
+    /* allocate and set to-be-derived keys */
+
+    blocksize = enc->block_size;
+    keybytes = enc->keybytes;
+    keylength = enc->keylength;
+
+    /* key->length will be tested in enc->encrypt
+       output->length will be tested in krb5_hmac */
+
+    if ((kcdata = (unsigned char *) malloc(keylength)) == NULL)
+	return(ENOMEM);
+
+    kc.contents = kcdata;
+    kc.length = keylength;
+
+    /* derive the key */
+ 
+    datain.data = (char *) constantdata;
+    datain.length = K5CLENGTH;
+
+    store_32_be(usage, constantdata);
+
+    datain.data[4] = (char) 0x99;
+
+    if ((ret = krb5_derive_key(enc, key, &kc, &datain)) != 0)
+	goto cleanup;
+
+    /* hash the data */
+
+    datain = *input;
+
+    if ((ret = krb5_hmac(hash, &kc, 1, &datain, output)) != 0)
+	memset(output->data, 0, output->length);
+
+    /* ret is set correctly by the prior call */
+
+cleanup:
+    memset(kcdata, 0, keylength);
+
+    free(kcdata);
+
+    return(ret);
+}
+
+krb5_error_code
+krb5int_dk_make_checksum_iov(const struct krb5_hash_provider *hash,
+		          const krb5_keyblock *key, krb5_keyusage usage,
+			  const krb5_crypto_iov *data, size_t num_data,
+			  krb5_data *output)
+{
+    int i;
+    const struct krb5_enc_provider *enc;
+    size_t blocksize, keybytes, keylength;
+    krb5_error_code ret;
+    unsigned char constantdata[K5CLENGTH];
+    krb5_data datain;
+    unsigned char *kcdata;
+    krb5_keyblock kc;
+
+    for (i=0; i<krb5_enctypes_length; i++) {
+	if (krb5_enctypes_list[i].etype == key->enctype)
+	    break;
+    }
+
+    if (i == krb5_enctypes_length)
+	return(KRB5_BAD_ENCTYPE);
+
+    enc = krb5_enctypes_list[i].enc;
+
+    /* allocate and set to-be-derived keys */
+
+    blocksize = enc->block_size;
+    keybytes = enc->keybytes;
+    keylength = enc->keylength;
+
+    /* key->length will be tested in enc->encrypt
+       output->length will be tested in krb5_hmac */
+
+    if ((kcdata = (unsigned char *) malloc(keylength)) == NULL)
+	return(ENOMEM);
+
+    kc.contents = kcdata;
+    kc.length = keylength;
+
+    /* derive the key */
+ 
+    datain.data = (char *) constantdata;
+    datain.length = K5CLENGTH;
+
+    store_32_be(usage, constantdata);
+
+    datain.data[4] = (char) 0x99;
+
+    if ((ret = krb5_derive_key(enc, key, &kc, &datain)) != 0)
+	goto cleanup;
+
+    /* hash the data */
+
+    if ((ret = krb5int_hmac_iov(hash, &kc, data, num_data, output)) != 0)
+	memset(output->data, 0, output->length);
+
+    /* ret is set correctly by the prior call */
+
+cleanup:
+    memset(kcdata, 0, keylength);
+
+    free(kcdata);
+
+    return(ret);
+}
+