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17 * may be used to endorse or promote products derived from this software
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33 * Copyright 2009 by the Massachusetts Institute of Technology.
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60 #include "gssapiP_eap.h"
63 gss_pseudo_random(OM_uint32 *minor,
66 const gss_buffer_t prf_in,
67 ssize_t desired_output_len,
76 krb5_context krbContext;
79 prf_out->value = NULL;
81 if (ctx == GSS_C_NO_CONTEXT) {
83 return GSS_S_CALL_INACCESSIBLE_READ | GSS_S_NO_CONTEXT;
88 GSSEAP_MUTEX_LOCK(&ctx->mutex);
90 if (!CTX_IS_ESTABLISHED(ctx)) {
91 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
92 *minor = GSSEAP_CONTEXT_INCOMPLETE;
93 return GSS_S_NO_CONTEXT;
96 GSSEAP_KRB_INIT(&krbContext);
104 if (prf_key != GSS_C_PRF_KEY_PARTIAL &&
105 prf_key != GSS_C_PRF_KEY_FULL) {
106 code = GSSEAP_BAD_PRF_KEY;
110 prf_out->value = GSSEAP_MALLOC(desired_output_len);
111 if (prf_out->value == NULL) {
115 prf_out->length = desired_output_len;
117 code = krb5_c_prf_length(krbContext,
123 ns.length = 4 + prf_in->length;
124 ns.data = GSSEAP_MALLOC(ns.length);
125 if (ns.data == NULL) {
131 t.data = GSSEAP_MALLOC(t.length);
132 if (t.data == NULL) {
137 memcpy(ns.data + 4, prf_in->value, prf_in->length);
139 p = (unsigned char *)prf_out->value;
140 while (desired_output_len > 0) {
141 store_uint32_be(i, ns.data);
143 code = krb5_c_prf(krbContext, &ctx->rfc3961Key, &ns, &t);
147 memcpy(p, t.data, MIN(t.length, desired_output_len));
150 desired_output_len -= t.length;
155 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
158 gss_release_buffer(&tmpMinor, prf_out);
159 krb5_free_data_contents(krbContext, &ns);
160 krb5_free_data_contents(krbContext, &t);
164 return (code == 0) ? GSS_S_COMPLETE : GSS_S_FAILURE;