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55 * Message protection services: checksum helpers.
58 #include "gssapiP_eap.h"
61 gssEapChecksum(krb5_context context,
65 krb5_keyusage sign_usage,
66 gss_iov_buffer_desc *iov,
72 gss_iov_buffer_desc *header;
73 gss_iov_buffer_desc *trailer;
74 krb5_crypto_iov *kiov;
77 unsigned int k5_checksumlen;
82 code = krb5_c_crypto_length(context, KRB_KEY_TYPE(key),
83 KRB5_CRYPTO_TYPE_CHECKSUM, &k5_checksumlen);
87 header = gssEapLocateIov(iov, iov_count, GSS_IOV_BUFFER_TYPE_HEADER);
88 assert(header != NULL);
90 trailer = gssEapLocateIov(iov, iov_count, GSS_IOV_BUFFER_TYPE_TRAILER);
91 assert(rrc != 0 || trailer != NULL);
93 if (trailer == NULL) {
94 if (rrc != k5_checksumlen)
95 return KRB5_BAD_MSIZE;
96 if (header->buffer.length != 16 + k5_checksumlen)
97 return KRB5_BAD_MSIZE;
98 } else if (trailer->buffer.length != k5_checksumlen)
99 return KRB5_BAD_MSIZE;
101 kiov_count = 2 + iov_count;
102 kiov = (krb5_crypto_iov *)GSSEAP_MALLOC(kiov_count * sizeof(krb5_crypto_iov));
106 /* Checksum over ( Data | Header ) */
109 for (j = 0; j < iov_count; j++) {
110 kiov[i].flags = gssEapMapCryptoFlag(iov[j].type);
111 kiov[i].data.length = iov[j].buffer.length;
112 kiov[i].data.data = (char *)iov[j].buffer.value;
117 kiov[i].flags = KRB5_CRYPTO_TYPE_SIGN_ONLY;
118 kiov[i].data.length = 16;
119 kiov[i].data.data = (char *)header->buffer.value;
123 kiov[i].flags = KRB5_CRYPTO_TYPE_CHECKSUM;
124 if (trailer == NULL) {
125 kiov[i].data.length = header->buffer.length - 16;
126 kiov[i].data.data = (char *)header->buffer.value + 16;
128 kiov[i].data.length = trailer->buffer.length;
129 kiov[i].data.data = (char *)trailer->buffer.value;
134 krb5_boolean kvalid = FALSE;
136 code = krb5_c_verify_checksum_iov(context, type, key,
137 sign_usage, kiov, kiov_count, &kvalid);
141 code = krb5_c_make_checksum_iov(context, type, key,
142 sign_usage, kiov, kiov_count);
151 gssEapSign(krb5_context context,
155 krb5_keyusage sign_usage,
156 gss_iov_buffer_desc *iov,
159 return gssEapChecksum(context, type, rrc, key,
160 sign_usage, iov, iov_count, 0, NULL);
164 gssEapVerify(krb5_context context,
168 krb5_keyusage sign_usage,
169 gss_iov_buffer_desc *iov,
173 return gssEapChecksum(context, type, rrc, key,
174 sign_usage, iov, iov_count, 1, valid);
179 gssEapEncodeGssChannelBindings(OM_uint32 *minor,
180 gss_channel_bindings_t chanBindings,
181 gss_buffer_t encodedBindings)
183 OM_uint32 major, tmpMinor;
187 if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS) {
189 length += chanBindings->initiator_address.length;
190 length += chanBindings->acceptor_address.length;
191 length += chanBindings->application_data.length;
193 encodedBindings->value = GSSEAP_MALLOC(length);
194 if (encodedBindings->value == NULL) {
196 return GSS_S_FAILURE;
199 encodedBindings->length = length;
200 p = (unsigned char *)encodedBindings->value;
202 store_uint32_be(chanBindings->initiator_addrtype, p);
203 store_buffer(&chanBindings->initiator_address, p + 4, 0);
204 p += 4 + chanBindings->initiator_address.length;
206 store_uint32_be(chanBindings->acceptor_addrtype, p);
207 store_buffer(&chanBindings->acceptor_address, p + 4, 0);
208 p += 4 + chanBindings->acceptor_address.length;
210 store_buffer(&chanBindings->application_data, p, 1);
211 p += chanBindings->application_data.length;
213 encodedBindings->length = 0;
214 encodedBindings->value = NULL;
218 return GSS_S_COMPLETE;