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34 #include <krb5_locl.h>
36 RCSID("$Id: mk_safe.c,v 1.28.4.1 2004/03/07 12:46:43 lha Exp $");
39 krb5_mk_safe(krb5_context context,
40 krb5_auth_context auth_context,
41 const krb5_data *userdata,
43 /*krb5_replay_data*/ void *outdata)
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 s.safe_body.user_data = *userdata;
68 krb5_us_timeofday (context, &sec, &usec);
71 s.safe_body.timestamp = &sec2;
73 s.safe_body.usec = &usec2;
74 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) {
75 tmp_seq = auth_context->local_seqnumber;
76 s.safe_body.seq_number = &tmp_seq;
78 s.safe_body.seq_number = NULL;
80 s.safe_body.s_address = auth_context->local_address;
81 s.safe_body.r_address = auth_context->remote_address;
83 s.cksum.cksumtype = 0;
84 s.cksum.checksum.data = NULL;
85 s.cksum.checksum.length = 0;
87 ASN1_MALLOC_ENCODE(KRB_SAFE, buf, buf_size, &s, &len, ret);
91 krb5_abortx(context, "internal error in ASN.1 encoder");
92 ret = krb5_crypto_init(context, key, 0, &crypto);
97 ret = krb5_create_checksum(context,
99 KRB5_KU_KRB_SAFE_CKSUM,
104 krb5_crypto_destroy(context, crypto);
111 ASN1_MALLOC_ENCODE(KRB_SAFE, buf, buf_size, &s, &len, ret);
112 free_Checksum (&s.cksum);
116 krb5_abortx(context, "internal error in ASN.1 encoder");
118 outbuf->length = len;
120 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE)
121 auth_context->local_seqnumber =
122 (auth_context->local_seqnumber + 1) & 0xFFFFFFFF;