+
+#ifdef HAVE_KRB5INT_C_MANDATORY_CKSUMTYPE
+extern krb5_error_code
+krb5int_c_mandatory_cksumtype(krb5_context, krb5_enctype, krb5_cksumtype *);
+#endif
+
+OM_uint32
+rfc3961ChecksumTypeForKey(OM_uint32 *minor,
+ krb5_keyblock *key,
+ krb5_cksumtype *cksumtype)
+{
+ krb5_context krbContext;
+#ifndef HAVE_KRB5INT_C_MANDATORY_CKSUMTYPE
+ krb5_data data;
+ krb5_checksum cksum;
+#endif
+
+ GSSEAP_KRB_INIT(&krbContext);
+
+#ifdef HAVE_KRB5INT_C_MANDATORY_CKSUMTYPE
+ *minor = krb5int_c_mandatory_cksumtype(krbContext, KRB_KEY_TYPE(key),
+ cksumtype);
+ if (*minor != 0)
+ return GSS_S_FAILURE;
+#else
+ data.length = 0;
+ data.data = NULL;
+
+ memset(&cksum, 0, sizeof(cksum));
+
+ /*
+ * This is a complete hack but it's the only way to work with
+ * MIT Kerberos pre-1.9 without using private API, as it does
+ * not support passing in zero as the checksum type.
+ */
+ *minor = krb5_c_make_checksum(krbContext, 0, key, 0, &data, &cksum);
+ if (*minor != 0)
+ return GSS_S_FAILURE;
+
+#ifdef HAVE_HEIMDAL_VERSION
+ *cksumtype = cksum.cksumtype;
+#else
+ *cksumtype = cksum.checksum_type;
+#endif
+
+ krb5_free_checksum_contents(krbContext, &cksum);
+#endif /* HAVE_KRB5INT_C_MANDATORY_CKSUMTYPE */
+
+ if (!krb5_c_is_keyed_cksum(*cksumtype)) {
+ *minor = KRB5KRB_AP_ERR_INAPP_CKSUM;
+ return GSS_S_FAILURE;
+ }
+
+ return GSS_S_COMPLETE;
+}
+
+#ifdef HAVE_HEIMDAL_VERSION
+static heim_general_string krbAnonymousPrincipalComponents[] =
+ { KRB5_WELLKNOWN_NAME, KRB5_ANON_NAME };
+
+static const Principal krbAnonymousPrincipalData = {
+ { KRB5_NT_WELLKNOWN, { 2, krbAnonymousPrincipalComponents } },
+ "WELLKNOWN:ANONYMOUS"
+};
+#endif
+
+krb5_const_principal
+krbAnonymousPrincipal(void)
+{
+#ifdef HAVE_HEIMDAL_VERSION
+ return &krbAnonymousPrincipalData;
+#else
+ return krb5_anonymous_principal();
+#endif
+}
+
+krb5_error_code
+krbCryptoLength(krb5_context krbContext,
+#ifdef HAVE_HEIMDAL_VERSION
+ krb5_crypto krbCrypto,
+#else
+ krb5_keyblock *key,
+#endif
+ int type,
+ size_t *length)
+{
+#ifdef HAVE_HEIMDAL_VERSION
+ return krb5_crypto_length(krbContext, krbCrypto, type, length);
+#else
+ unsigned int len;
+ krb5_error_code code;
+
+ code = krb5_c_crypto_length(krbContext, KRB_KEY_TYPE(key), type, &len);
+ if (code == 0)
+ *length = (size_t)len;
+
+ return code;
+#endif
+}
+
+krb5_error_code
+krbPaddingLength(krb5_context krbContext,
+#ifdef HAVE_HEIMDAL_VERSION
+ krb5_crypto krbCrypto,
+#else
+ krb5_keyblock *key,
+#endif
+ size_t dataLength,
+ size_t *padLength)
+{
+ krb5_error_code code;
+#ifdef HAVE_HEIMDAL_VERSION
+ size_t headerLength, paddingLength;
+
+ code = krbCryptoLength(krbContext, krbCrypto,
+ KRB5_CRYPTO_TYPE_HEADER, &headerLength);
+ if (code != 0)
+ return code;
+
+ dataLength += headerLength;
+
+ code = krb5_crypto_length(krbContext, krbCrypto,
+ KRB5_CRYPTO_TYPE_PADDING, &paddingLength);
+ if (code != 0)
+ return code;
+
+ if (paddingLength != 0 && (dataLength % paddingLength) != 0)
+ *padLength = paddingLength - (dataLength % paddingLength);
+ else
+ *padLength = 0;
+
+ return 0;
+#else
+ unsigned int pad;
+
+ code = krb5_c_padding_length(krbContext, KRB_KEY_TYPE(key), dataLength, &pad);
+ if (code == 0)
+ *padLength = (size_t)pad;
+
+ return code;
+#endif /* HAVE_HEIMDAL_VERSION */
+}
+
+krb5_error_code
+krbBlockSize(krb5_context krbContext,
+#ifdef HAVE_HEIMDAL_VERSION
+ krb5_crypto krbCrypto,
+#else
+ krb5_keyblock *key,
+#endif
+ size_t *blockSize)
+{
+#ifdef HAVE_HEIMDAL_VERSION
+ return krb5_crypto_getblocksize(krbContext, krbCrypto, blockSize);
+#else
+ return krb5_c_block_size(krbContext, KRB_KEY_TYPE(key), blockSize);
+#endif
+}
+
+krb5_error_code
+krbEnctypeToString(krb5_context krbContext,
+ krb5_enctype enctype,
+ const char *prefix,
+ gss_buffer_t string)
+{
+ krb5_error_code code;
+#ifdef HAVE_HEIMDAL_VERSION
+ char *enctypeBuf = NULL;
+#else
+ char enctypeBuf[128];
+#endif
+ size_t prefixLength, enctypeLength;
+
+#ifdef HAVE_HEIMDAL_VERSION
+ code = krb5_enctype_to_string(krbContext, enctype, &enctypeBuf);
+#else
+ code = krb5_enctype_to_name(enctype, 0, enctypeBuf, sizeof(enctypeBuf));
+#endif
+ if (code != 0)
+ return code;
+
+ prefixLength = (prefix != NULL) ? strlen(prefix) : 0;
+ enctypeLength = strlen(enctypeBuf);
+
+ string->value = GSSEAP_MALLOC(prefixLength + enctypeLength + 1);
+ if (string->value == NULL) {
+#ifdef HAVE_HEIMDAL_VERSION
+ krb5_xfree(enctypeBuf);
+#endif
+ return ENOMEM;
+ }
+
+ if (prefixLength != 0)
+ memcpy(string->value, prefix, prefixLength);
+ memcpy((char *)string->value + prefixLength, enctypeBuf, enctypeLength);
+
+ string->length = prefixLength + enctypeLength;
+ ((char *)string->value)[string->length] = '\0';
+
+#ifdef HAVE_HEIMDAL_VERSION
+ krb5_xfree(enctypeBuf);
+#endif
+
+ return 0;
+}