ce58eb9081
Annotate libkdc APIs with KDC_LIB_{CALL,FUNCTION} to ensure correct calling
convention and optimized DLL importing on Windows.
Ensure Windows and libtool export tables are consistent.
123 lines
4.3 KiB
C
123 lines
4.3 KiB
C
/*
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* Copyright (c) 2019 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "kdc_locl.h"
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#include "token_validator_plugin.h"
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struct plctx {
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const char *realm;
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const char *token_kind;
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krb5_data *token;
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const char * const *audiences;
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size_t naudiences;
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krb5_boolean result;
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krb5_principal actual_principal;
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krb5_times token_times;
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};
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static krb5_error_code KRB5_LIB_CALL
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plcallback(krb5_context context, const void *plug, void *plugctx, void *userctx)
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{
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const krb5plugin_token_validator_ftable *validator = plug;
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krb5_error_code ret;
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struct plctx *plctx = userctx;
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ret = validator->validate(plugctx, context, plctx->realm,
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plctx->token_kind, plctx->token,
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plctx->audiences, plctx->naudiences,
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&plctx->result, &plctx->actual_principal,
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&plctx->token_times);
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if (ret) {
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krb5_free_principal(context, plctx->actual_principal);
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plctx->actual_principal = NULL;
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}
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return ret;
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}
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static const char *plugin_deps[] = { "krb5", NULL };
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static struct heim_plugin_data token_validator_data = {
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"kdc",
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KDC_PLUGIN_BEARER,
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1,
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plugin_deps,
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krb5_get_instance
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};
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/*
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* Invoke a plugin to validate a JWT/SAML/OIDC token and partially-evaluate
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* access control.
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*/
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KDC_LIB_FUNCTION krb5_error_code KDC_LIB_CALL
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kdc_validate_token(krb5_context context,
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const char *realm,
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const char *token_kind,
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krb5_data *token,
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const char * const *audiences,
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size_t naudiences,
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krb5_principal *actual_principal,
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krb5_times *token_times)
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{
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krb5_error_code ret;
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struct plctx ctx;
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memset(&ctx, 0, sizeof(ctx));
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ctx.realm = realm;
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ctx.token_kind = token_kind;
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ctx.token = token;
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ctx.audiences = audiences;
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ctx.naudiences = naudiences;
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ctx.result = FALSE;
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ctx.actual_principal = NULL;
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krb5_clear_error_message(context);
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ret = _krb5_plugin_run_f(context, &token_validator_data, 0, &ctx,
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plcallback);
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if (ret == 0 && ctx.result && actual_principal) {
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*actual_principal = ctx.actual_principal;
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ctx.actual_principal = NULL;
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}
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if (token_times)
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*token_times = ctx.token_times;
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krb5_free_principal(context, ctx.actual_principal);
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if (ret)
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krb5_prepend_error_message(context, ret, "bearer token validation "
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"failed: ");
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else if (!ctx.result)
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krb5_set_error_message(context, ret = EACCES,
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"bearer token validation failed");
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return ret;
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}
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