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34 #include <krb5_locl.h>
36 RCSID("$Id: mk_rep.c 13863 2004-05-25 21:46:46Z lha $");
38 krb5_error_code KRB5_LIB_FUNCTION
39 krb5_mk_rep(krb5_context context,
40 krb5_auth_context auth_context,
52 ap.msg_type = krb_ap_rep;
54 memset (&body, 0, sizeof(body));
56 body.ctime = auth_context->authenticator->ctime;
57 body.cusec = auth_context->authenticator->cusec;
58 if (auth_context->flags & KRB5_AUTH_CONTEXT_USE_SUBKEY) {
59 if (auth_context->local_subkey == NULL) {
60 ret = krb5_auth_con_generatelocalsubkey(context,
62 auth_context->keyblock);
64 krb5_set_error_string (context,
65 "krb5_mk_rep: generating subkey");
66 free_EncAPRepPart(&body);
70 ret = krb5_copy_keyblock(context, auth_context->local_subkey,
73 krb5_set_error_string (context,
74 "krb5_copy_keyblock: out of memory");
75 free_EncAPRepPart(&body);
80 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) {
81 if(auth_context->local_seqnumber == 0)
82 krb5_generate_seq_number (context,
83 auth_context->keyblock,
84 &auth_context->local_seqnumber);
85 ALLOC(body.seq_number, 1);
86 if (body.seq_number == NULL) {
87 krb5_set_error_string (context, "malloc: out of memory");
88 free_EncAPRepPart(&body);
91 *(body.seq_number) = auth_context->local_seqnumber;
93 body.seq_number = NULL;
95 ap.enc_part.etype = auth_context->keyblock->keytype;
96 ap.enc_part.kvno = NULL;
98 ASN1_MALLOC_ENCODE(EncAPRepPart, buf, buf_size, &body, &len, ret);
99 free_EncAPRepPart (&body);
103 krb5_abortx(context, "internal error in ASN.1 encoder");
104 ret = krb5_crypto_init(context, auth_context->keyblock,
105 0 /* ap.enc_part.etype */, &crypto);
110 ret = krb5_encrypt (context,
112 KRB5_KU_AP_REQ_ENC_PART,
113 buf + buf_size - len,
115 &ap.enc_part.cipher);
116 krb5_crypto_destroy(context, crypto);
121 ASN1_MALLOC_ENCODE(AP_REP, outbuf->data, outbuf->length, &ap, &len, ret);
122 if (ret == 0 && outbuf->length != len)
123 krb5_abortx(context, "internal error in ASN.1 encoder");