4 #include <gssapi/gssapi.h>
9 static gss_OID_desc putty_gss_mech_krb5_desc =
10 { 9, (void *)"\x2a\x86\x48\x86\xf7\x12\x01\x02\x02" };
11 static gss_OID const putty_gss_mech_krb5 = &putty_gss_mech_krb5_desc;
13 typedef struct uxSsh_gss_ctx {
19 int ssh_gss_init(void)
21 /* On Windows this tries to load the SSPI library functions. On
22 Unix we assume we have GSSAPI at runtime if we were linked with
27 Ssh_gss_stat ssh_gss_indicate_mech(Ssh_gss_buf *mech)
29 /* Copy constant into mech */
30 mech->length = putty_gss_mech_krb5->length;
31 mech->value = putty_gss_mech_krb5->elements;
36 Ssh_gss_stat ssh_gss_import_name(char *host,
37 Ssh_gss_name *srv_name)
39 OM_uint32 min_stat,maj_stat;
40 gss_buffer_desc host_buf;
43 pStr = dupcat("host@", host, NULL);
45 host_buf.value = pStr;
46 host_buf.length = strlen(pStr);
48 maj_stat = gss_import_name(&min_stat, &host_buf,
49 GSS_C_NT_HOSTBASED_SERVICE, srv_name);
52 if (maj_stat == GSS_S_COMPLETE) return SSH_GSS_OK;
53 return SSH_GSS_FAILURE;
56 Ssh_gss_stat ssh_gss_acquire_cred(Ssh_gss_ctx *ctx)
58 uxSsh_gss_ctx *uxctx = snew(uxSsh_gss_ctx);
60 uxctx->maj_stat = uxctx->min_stat = GSS_S_COMPLETE;
61 uxctx->ctx = GSS_C_NO_CONTEXT;
62 *ctx = (Ssh_gss_ctx) uxctx;
67 Ssh_gss_stat ssh_gss_init_sec_context(Ssh_gss_ctx *ctx,
68 Ssh_gss_name srv_name,
70 Ssh_gss_buf *recv_tok,
71 Ssh_gss_buf *send_tok)
73 uxSsh_gss_ctx *uxctx = (uxSsh_gss_ctx*) *ctx;
76 if (to_deleg) to_deleg = GSS_C_DELEG_FLAG;
77 uxctx->maj_stat = gss_init_sec_context(&uxctx->min_stat,
81 (gss_OID) putty_gss_mech_krb5,
83 GSS_C_INTEG_FLAG | to_deleg,
85 GSS_C_NO_CHANNEL_BINDINGS,
87 NULL, /* ignore mech type */
90 NULL); /* ignore time_rec */
92 if (uxctx->maj_stat == GSS_S_COMPLETE) return SSH_GSS_S_COMPLETE;
93 if (uxctx->maj_stat == GSS_S_CONTINUE_NEEDED) return SSH_GSS_S_CONTINUE_NEEDED;
94 return SSH_GSS_FAILURE;
97 Ssh_gss_stat ssh_gss_display_status(Ssh_gss_ctx ctx, Ssh_gss_buf *buf)
99 uxSsh_gss_ctx *uxctx = (uxSsh_gss_ctx *) ctx;
102 gss_buffer_desc msg_maj=GSS_C_EMPTY_BUFFER;
103 gss_buffer_desc msg_min=GSS_C_EMPTY_BUFFER;
105 /* Return empty buffer in case of failure */
106 SSH_GSS_CLEAR_BUF(buf);
108 /* get first mesg from GSS */
110 lmax=gss_display_status(&lmin,uxctx->maj_stat,GSS_C_GSS_CODE,(gss_OID) putty_gss_mech_krb5,&ccc,&msg_maj);
112 if (lmax != GSS_S_COMPLETE) return SSH_GSS_FAILURE;
114 /* get first mesg from Kerberos */
116 lmax=gss_display_status(&lmin,uxctx->min_stat,GSS_C_MECH_CODE,(gss_OID) putty_gss_mech_krb5,&ccc,&msg_min);
118 if (lmax != GSS_S_COMPLETE) {
119 gss_release_buffer(&lmin, &msg_maj);
120 return SSH_GSS_FAILURE;
123 /* copy data into buffer */
124 buf->length = msg_maj.length + msg_min.length + 1;
125 buf->value = snewn(buf->length + 1, char);
128 memcpy((char *)buf->value, msg_maj.value, msg_maj.length);
129 ((char *)buf->value)[msg_maj.length] = ' ';
130 memcpy((char *)buf->value + msg_maj.length + 1, msg_min.value, msg_min.length);
131 ((char *)buf->value)[buf->length] = 0;
132 /* free mem & exit */
133 gss_release_buffer(&lmin, &msg_maj);
134 gss_release_buffer(&lmin, &msg_min);
138 Ssh_gss_stat ssh_gss_free_tok(Ssh_gss_buf *send_tok)
140 OM_uint32 min_stat,maj_stat;
141 maj_stat = gss_release_buffer(&min_stat, send_tok);
143 if (maj_stat == GSS_S_COMPLETE) return SSH_GSS_OK;
144 return SSH_GSS_FAILURE;
147 Ssh_gss_stat ssh_gss_release_cred(Ssh_gss_ctx *ctx)
149 uxSsh_gss_ctx *uxctx = (uxSsh_gss_ctx *) *ctx;
151 OM_uint32 maj_stat=GSS_S_COMPLETE;
153 if (uxctx == NULL) return SSH_GSS_FAILURE;
154 if (uxctx->ctx != GSS_C_NO_CONTEXT)
155 maj_stat = gss_delete_sec_context(&min_stat,&uxctx->ctx,GSS_C_NO_BUFFER);
158 if (maj_stat == GSS_S_COMPLETE) return SSH_GSS_OK;
159 return SSH_GSS_FAILURE;
163 Ssh_gss_stat ssh_gss_release_name(Ssh_gss_name *srv_name)
165 OM_uint32 min_stat,maj_stat;
166 maj_stat = gss_release_name(&min_stat, srv_name);
168 if (maj_stat == GSS_S_COMPLETE) return SSH_GSS_OK;
169 return SSH_GSS_FAILURE;
172 Ssh_gss_stat ssh_gss_get_mic(Ssh_gss_ctx ctx, Ssh_gss_buf *buf,
175 uxSsh_gss_ctx *uxctx = (uxSsh_gss_ctx *) ctx;
176 if (uxctx == NULL) return SSH_GSS_FAILURE;
177 return gss_get_mic(&(uxctx->min_stat), uxctx->ctx, 0, buf, hash);
180 Ssh_gss_stat ssh_gss_free_mic(Ssh_gss_buf *hash)
182 /* On Unix this is the same freeing process as ssh_gss_free_tok. */
183 return ssh_gss_free_tok(hash);
188 /* Dummy function so this source file defines something if NO_GSSAPI
191 int ssh_gss_init(void)