2 * Copyright (c) 1997 - 2003 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
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7 * modification, are permitted provided that the following conditions
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34 #include "krb5_locl.h"
36 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
37 krb5_mk_safe(krb5_context context,
38 krb5_auth_context auth_context,
39 const krb5_data *userdata,
41 krb5_replay_data *outdata)
50 krb5_replay_data rdata;
52 if ((auth_context->flags &
53 (KRB5_AUTH_CONTEXT_RET_TIME | KRB5_AUTH_CONTEXT_RET_SEQUENCE)) &&
55 return KRB5_RC_REQUIRED; /* XXX better error, MIT returns this */
57 if (auth_context->local_subkey)
58 key = auth_context->local_subkey;
59 else if (auth_context->remote_subkey)
60 key = auth_context->remote_subkey;
62 key = auth_context->keyblock;
65 s.msg_type = krb_safe;
67 memset(&rdata, 0, sizeof(rdata));
69 s.safe_body.user_data = *userdata;
71 krb5_us_timeofday (context, &rdata.timestamp, &rdata.usec);
73 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_TIME) {
74 s.safe_body.timestamp = &rdata.timestamp;
75 s.safe_body.usec = &rdata.usec;
77 s.safe_body.timestamp = NULL;
78 s.safe_body.usec = NULL;
81 if (auth_context->flags & KRB5_AUTH_CONTEXT_RET_TIME) {
82 outdata->timestamp = rdata.timestamp;
83 outdata->usec = rdata.usec;
86 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) {
87 rdata.seq = auth_context->local_seqnumber;
88 s.safe_body.seq_number = &rdata.seq;
90 s.safe_body.seq_number = NULL;
92 if (auth_context->flags & KRB5_AUTH_CONTEXT_RET_SEQUENCE)
93 outdata->seq = auth_context->local_seqnumber;
95 s.safe_body.s_address = auth_context->local_address;
96 s.safe_body.r_address = auth_context->remote_address;
98 s.cksum.cksumtype = 0;
99 s.cksum.checksum.data = NULL;
100 s.cksum.checksum.length = 0;
102 ASN1_MALLOC_ENCODE(KRB_SAFE, buf, buf_size, &s, &len, ret);
106 krb5_abortx(context, "internal error in ASN.1 encoder");
107 ret = krb5_crypto_init(context, key, 0, &crypto);
112 ret = krb5_create_checksum(context,
114 KRB5_KU_KRB_SAFE_CKSUM,
119 krb5_crypto_destroy(context, crypto);
126 ASN1_MALLOC_ENCODE(KRB_SAFE, buf, buf_size, &s, &len, ret);
127 free_Checksum (&s.cksum);
131 krb5_abortx(context, "internal error in ASN.1 encoder");
133 outbuf->length = len;
135 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE)
136 auth_context->local_seqnumber =
137 (auth_context->local_seqnumber + 1) & 0xFFFFFFFF;