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54 #include "gssapiP_eap.h"
57 gssEapChecksum(krb5_context context,
61 krb5_keyusage sign_usage,
62 gss_iov_buffer_desc *iov,
68 gss_iov_buffer_desc *header;
69 gss_iov_buffer_desc *trailer;
70 krb5_crypto_iov *kiov;
73 unsigned int k5_checksumlen;
78 code = krb5_c_crypto_length(context, KRB_KEYTYPE(key), KRB5_CRYPTO_TYPE_CHECKSUM, &k5_checksumlen);
82 header = gssEapLocateIov(iov, iov_count, GSS_IOV_BUFFER_TYPE_HEADER);
83 assert(header != NULL);
85 trailer = gssEapLocateIov(iov, iov_count, GSS_IOV_BUFFER_TYPE_TRAILER);
86 assert(rrc != 0 || trailer != NULL);
88 if (trailer == NULL) {
89 if (rrc != k5_checksumlen)
90 return KRB5_BAD_MSIZE;
91 if (header->buffer.length != 16 + k5_checksumlen)
92 return KRB5_BAD_MSIZE;
93 } else if (trailer->buffer.length != k5_checksumlen)
94 return KRB5_BAD_MSIZE;
96 kiov_count = 2 + iov_count;
97 kiov = (krb5_crypto_iov *)GSSEAP_MALLOC(kiov_count * sizeof(krb5_crypto_iov));
101 /* Checksum over ( Data | Header ) */
104 for (j = 0; j < iov_count; j++) {
105 kiov[i].flags = gssEapTranslateCryptoFlag(iov[j].type);
106 kiov[i].data.length = iov[j].buffer.length;
107 kiov[i].data.data = (char *)iov[j].buffer.value;
112 kiov[i].flags = KRB5_CRYPTO_TYPE_SIGN_ONLY;
113 kiov[i].data.length = 16;
114 kiov[i].data.data = (char *)header->buffer.value;
118 kiov[i].flags = KRB5_CRYPTO_TYPE_CHECKSUM;
119 if (trailer == NULL) {
120 kiov[i].data.length = header->buffer.length - 16;
121 kiov[i].data.data = (char *)header->buffer.value + 16;
123 kiov[i].data.length = trailer->buffer.length;
124 kiov[i].data.data = (char *)trailer->buffer.value;
129 krb5_boolean kvalid = FALSE;
131 code = krb5_c_verify_checksum_iov(context, type, key,
132 sign_usage, kiov, kiov_count, &kvalid);
136 code = krb5_c_make_checksum_iov(context, type, key,
137 sign_usage, kiov, kiov_count);
146 gssEapSign(krb5_context context,
150 krb5_keyusage sign_usage,
151 gss_iov_buffer_desc *iov,
154 return gssEapChecksum(context, type, rrc, key,
155 sign_usage, iov, iov_count, 0, NULL);
159 gssEapVerify(krb5_context context,
163 krb5_keyusage sign_usage,
164 gss_iov_buffer_desc *iov,
168 return gssEapChecksum(context, type, rrc, key,
169 sign_usage, iov, iov_count, 1, valid);