diff options
Diffstat (limited to 'src/lib/crypto/krb/keyhash_provider/md5_hmac.c')
-rw-r--r-- | src/lib/crypto/krb/keyhash_provider/md5_hmac.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/src/lib/crypto/krb/keyhash_provider/md5_hmac.c b/src/lib/crypto/krb/keyhash_provider/md5_hmac.c new file mode 100644 index 0000000..d05b97f --- /dev/null +++ b/src/lib/crypto/krb/keyhash_provider/md5_hmac.c @@ -0,0 +1,65 @@ +/* + * lib/crypto/keyhash_provider/md5_hmac.c + * + * Copyright 2001, 2009 by the Massachusetts Institute of Technology. + * 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 M.I.T. not be used in advertising or publicity pertaining + * to distribution of the software without specific, written prior + * permission. Furthermore if you modify this software you must label + * your software as modified software and not distribute it in such a + * fashion that it might be confused with the original M.I.T. software. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" without express + * or implied warranty. + * + * Implementation of Microsoft KERB_CHECKSUM_MD5_HMAC + */ + +#include "k5-int.h" +#include "keyhash_provider.h" +#include "arcfour-int.h" +#include "rsa-md5.h" +#include "hash_provider.h" + +static krb5_error_code +k5_md5_hmac_hash (const krb5_keyblock *key, krb5_keyusage usage, + const krb5_data *iv, + const krb5_data *input, krb5_data *output) +{ + krb5_keyusage ms_usage; + krb5_MD5_CTX ctx; + unsigned char t[4]; + krb5_data ds; + + krb5_MD5Init(&ctx); + + ms_usage = krb5int_arcfour_translate_usage (usage); + store_32_le(ms_usage, t); + krb5_MD5Update(&ctx, t, sizeof(t)); + krb5_MD5Update(&ctx, (unsigned char *)input->data, input->length); + krb5_MD5Final(&ctx); + + ds.magic = KV5M_DATA; + ds.length = 16; + ds.data = (char *)ctx.digest; + + return krb5_hmac ( &krb5int_hash_md5, key, 1, &ds, output); +} + +const struct krb5_keyhash_provider krb5int_keyhash_md5_hmac = { + 16, + k5_md5_hmac_hash, + NULL /*checksum again*/ +}; + |