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34 #include <krb5_locl.h>
36 RCSID("$Id: mk_safe.c 13863 2004-05-25 21:46:46Z lha $");
38 krb5_error_code KRB5_LIB_FUNCTION
39 krb5_mk_safe(krb5_context context,
40 krb5_auth_context auth_context,
41 const krb5_data *userdata,
43 krb5_replay_data *outdata)
52 krb5_replay_data rdata;
54 if ((auth_context->flags &
55 (KRB5_AUTH_CONTEXT_RET_TIME | KRB5_AUTH_CONTEXT_RET_SEQUENCE)) &&
57 return KRB5_RC_REQUIRED; /* XXX better error, MIT returns this */
59 if (auth_context->local_subkey)
60 key = auth_context->local_subkey;
61 else if (auth_context->remote_subkey)
62 key = auth_context->remote_subkey;
64 key = auth_context->keyblock;
67 s.msg_type = krb_safe;
69 memset(&rdata, 0, sizeof(rdata));
71 s.safe_body.user_data = *userdata;
73 krb5_us_timeofday (context, &rdata.timestamp, &rdata.usec);
75 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_TIME) {
76 s.safe_body.timestamp = &rdata.timestamp;
77 s.safe_body.usec = &rdata.usec;
79 s.safe_body.timestamp = NULL;
80 s.safe_body.usec = NULL;
83 if (auth_context->flags & KRB5_AUTH_CONTEXT_RET_TIME) {
84 outdata->timestamp = rdata.timestamp;
85 outdata->usec = rdata.usec;
88 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) {
89 rdata.seq = auth_context->local_seqnumber;
90 s.safe_body.seq_number = &rdata.seq;
92 s.safe_body.seq_number = NULL;
94 if (auth_context->flags & KRB5_AUTH_CONTEXT_RET_SEQUENCE)
95 outdata->seq = auth_context->local_seqnumber;
97 s.safe_body.s_address = auth_context->local_address;
98 s.safe_body.r_address = auth_context->remote_address;
100 s.cksum.cksumtype = 0;
101 s.cksum.checksum.data = NULL;
102 s.cksum.checksum.length = 0;
104 ASN1_MALLOC_ENCODE(KRB_SAFE, buf, buf_size, &s, &len, ret);
108 krb5_abortx(context, "internal error in ASN.1 encoder");
109 ret = krb5_crypto_init(context, key, 0, &crypto);
114 ret = krb5_create_checksum(context,
116 KRB5_KU_KRB_SAFE_CKSUM,
121 krb5_crypto_destroy(context, crypto);
128 ASN1_MALLOC_ENCODE(KRB_SAFE, buf, buf_size, &s, &len, ret);
129 free_Checksum (&s.cksum);
133 krb5_abortx(context, "internal error in ASN.1 encoder");
135 outbuf->length = len;
137 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE)
138 auth_context->local_seqnumber =
139 (auth_context->local_seqnumber + 1) & 0xFFFFFFFF;