/*
   GSS-PROXY

   Copyright (C) 2012 Red Hat, Inc.
   Copyright (C) 2012 Simo Sorce <simo.sorce@redhat.com>

   Permission is hereby granted, free of charge, to any person obtaining a
   copy of this software and associated documentation files (the "Software"),
   to deal in the Software without restriction, including without limitation
   the rights to use, copy, modify, merge, publish, distribute, sublicense,
   and/or sell copies of the Software, and to permit persons to whom the
   Software is furnished to do so, subject to the following conditions:

   The above copyright notice and this permission notice shall be included in
   all copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
   THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   DEALINGS IN THE SOFTWARE.
*/

#include "gss_plugin.h"

OM_uint32 gssi_wrap(OM_uint32 *minor_status,
                    gss_ctx_id_t context_handle,
                    int conf_req_flag,
                    gss_qop_t qop_req,
                    gss_buffer_t input_message_buffer,
                    int *conf_state,
                    gss_buffer_t output_message_buffer)
{
    struct gpp_context_handle *ctx_handle;
    OM_uint32 maj, min;

    GSSI_TRACE();

    ctx_handle = (struct gpp_context_handle *)context_handle;
    if (!ctx_handle) {
        return GSS_S_CALL_INACCESSIBLE_READ;
    }

    /* for now we do encryption only locally and only for specific known
     * mechanisms for which we can export/import the context */
    if (ctx_handle->remote && !ctx_handle->local) {
        maj = gpp_remote_to_local_ctx(&min, &ctx_handle->remote,
                                            &ctx_handle->local);
        if (maj != GSS_S_COMPLETE) {
            *minor_status = gpp_map_error(min);
            return maj;
        }
    }

    return gss_wrap(minor_status, ctx_handle->local,
                    conf_req_flag, qop_req,
                    input_message_buffer, conf_state,
                    output_message_buffer);
}

OM_uint32 gssi_wrap_size_limit(OM_uint32 *minor_status,
                               gss_ctx_id_t context_handle,
                               int conf_req_flag,
                               gss_qop_t qop_req,
                               OM_uint32 req_output_size,
                               OM_uint32 *max_input_size)
{
    struct gpp_context_handle *ctx_handle;
    OM_uint32 maj, min;

    GSSI_TRACE();

    ctx_handle = (struct gpp_context_handle *)context_handle;
    if (!ctx_handle) {
        return GSS_S_CALL_INACCESSIBLE_READ;
    }

    /* for now we do encryption only locally and only for specific known
     * mechanisms for which we can export/import the context */
    if (ctx_handle->remote && !ctx_handle->local) {
        maj = gpp_remote_to_local_ctx(&min, &ctx_handle->remote,
                                            &ctx_handle->local);
        if (maj != GSS_S_COMPLETE) {
            *minor_status = gpp_map_error(min);
            return maj;
        }
    }

    return gss_wrap_size_limit(minor_status, ctx_handle->local,
                               conf_req_flag, qop_req,
                               req_output_size, max_input_size);
}

OM_uint32 gssi_wrap_iov(OM_uint32 *minor_status,
                        gss_ctx_id_t context_handle,
                        int conf_req_flag,
                        gss_qop_t qop_req,
                        int *conf_state,
                        gss_iov_buffer_desc *iov,
                        int iov_count)
{
    struct gpp_context_handle *ctx_handle;
    OM_uint32 maj, min;

    GSSI_TRACE();

    ctx_handle = (struct gpp_context_handle *)context_handle;
    if (!ctx_handle) {
        return GSS_S_CALL_INACCESSIBLE_READ;
    }

    /* for now we do encryption only locally and only for specific known
     * mechanisms for which we can export/import the context */
    if (ctx_handle->remote && !ctx_handle->local) {
        maj = gpp_remote_to_local_ctx(&min, &ctx_handle->remote,
                                            &ctx_handle->local);
        if (maj != GSS_S_COMPLETE) {
            *minor_status = gpp_map_error(min);
            return maj;
        }
    }

    return gss_wrap_iov(minor_status, ctx_handle->local,
                        conf_req_flag, qop_req, conf_state,
                        iov, iov_count);
}

OM_uint32 gssi_wrap_iov_length(OM_uint32 *minor_status,
                               gss_ctx_id_t context_handle,
                               int conf_req_flag,
                               gss_qop_t qop_req,
                               int *conf_state,
                               gss_iov_buffer_desc *iov,
                               int iov_count)
{
    struct gpp_context_handle *ctx_handle;
    OM_uint32 maj, min;

    GSSI_TRACE();

    ctx_handle = (struct gpp_context_handle *)context_handle;
    if (!ctx_handle) {
        return GSS_S_CALL_INACCESSIBLE_READ;
    }

    /* for now we do encryption only locally and only for specific known
     * mechanisms for which we can export/import the context */
    if (ctx_handle->remote && !ctx_handle->local) {
        maj = gpp_remote_to_local_ctx(&min, &ctx_handle->remote,
                                            &ctx_handle->local);
        if (maj != GSS_S_COMPLETE) {
            *minor_status = gpp_map_error(min);
            return maj;
        }
    }

    return gss_wrap_iov_length(minor_status, ctx_handle->local,
                               conf_req_flag, qop_req, conf_state,
                               iov, iov_count);
}

OM_uint32 gssi_wrap_aead(OM_uint32 *minor_status,
	                 gss_ctx_id_t context_handle,
	                 int conf_req_flag,
	                 gss_qop_t qop_req,
	                 gss_buffer_t input_assoc_buffer,
	                 gss_buffer_t input_payload_buffer,
	                 int *conf_state,
	                 gss_buffer_t output_message_buffer)
{
    struct gpp_context_handle *ctx_handle;
    OM_uint32 maj, min;

    GSSI_TRACE();

    ctx_handle = (struct gpp_context_handle *)context_handle;
    if (!ctx_handle) {
        return GSS_S_CALL_INACCESSIBLE_READ;
    }

    /* for now we do encryption only locally and only for specific known
     * mechanisms for which we can export/import the context */
    if (ctx_handle->remote && !ctx_handle->local) {
        maj = gpp_remote_to_local_ctx(&min, &ctx_handle->remote,
                                            &ctx_handle->local);
        if (maj != GSS_S_COMPLETE) {
            *minor_status = gpp_map_error(min);
            return maj;
        }
    }

    return gss_wrap_aead(minor_status, ctx_handle->local,
                         conf_req_flag, qop_req,
                         input_assoc_buffer, input_payload_buffer,
                         conf_state, output_message_buffer);
}

OM_uint32 gssi_unwrap(OM_uint32 *minor_status,
                      gss_ctx_id_t context_handle,
                      gss_buffer_t input_message_buffer,
                      gss_buffer_t output_message_buffer,
                      int *conf_state,
                      gss_qop_t *qop_state)
{
    struct gpp_context_handle *ctx_handle;
    OM_uint32 maj, min;

    GSSI_TRACE();

    ctx_handle = (struct gpp_context_handle *)context_handle;
    if (!ctx_handle) {
        return GSS_S_CALL_INACCESSIBLE_READ;
    }

    /* for now we do encryption only locally and only for specific known
     * mechanisms for which we can export/import the context */
    if (ctx_handle->remote && !ctx_handle->local) {
        maj = gpp_remote_to_local_ctx(&min, &ctx_handle->remote,
                                            &ctx_handle->local);
        if (maj != GSS_S_COMPLETE) {
            *minor_status = gpp_map_error(min);
            return maj;
        }
    }

    return gss_unwrap(minor_status, ctx_handle->local,
                      input_message_buffer, output_message_buffer,
                      conf_state, qop_state);
}

OM_uint32 gssi_unwrap_iov(OM_uint32 *minor_status,
                          gss_ctx_id_t context_handle,
                          int *conf_state,
                          gss_qop_t *qop_state,
                          gss_iov_buffer_desc *iov,
                          int iov_count)
{
    struct gpp_context_handle *ctx_handle;
    OM_uint32 maj, min;

    GSSI_TRACE();

    ctx_handle = (struct gpp_context_handle *)context_handle;
    if (!ctx_handle) {
        return GSS_S_CALL_INACCESSIBLE_READ;
    }

    /* for now we do encryption only locally and only for specific known
     * mechanisms for which we can export/import the context */
    if (ctx_handle->remote && !ctx_handle->local) {
        maj = gpp_remote_to_local_ctx(&min, &ctx_handle->remote,
                                            &ctx_handle->local);
        if (maj != GSS_S_COMPLETE) {
            *minor_status = gpp_map_error(min);
            return maj;
        }
    }

    return gss_unwrap_iov(minor_status, ctx_handle->local,
                          conf_state, qop_state, iov, iov_count);
}

OM_uint32 gssi_unwrap_aead(OM_uint32 *minor_status,
                           gss_ctx_id_t context_handle,
                           gss_buffer_t input_message_buffer,
                           gss_buffer_t input_assoc_buffer,
                           gss_buffer_t output_payload_buffer,
                           int *conf_state,
                           gss_qop_t *qop_state)
{
    struct gpp_context_handle *ctx_handle;
    OM_uint32 maj, min;

    GSSI_TRACE();

    ctx_handle = (struct gpp_context_handle *)context_handle;
    if (!ctx_handle) {
        return GSS_S_CALL_INACCESSIBLE_READ;
    }

    /* for now we do encryption only locally and only for specific known
     * mechanisms for which we can export/import the context */
    if (ctx_handle->remote && !ctx_handle->local) {
        maj = gpp_remote_to_local_ctx(&min, &ctx_handle->remote,
                                            &ctx_handle->local);
        if (maj != GSS_S_COMPLETE) {
            *minor_status = gpp_map_error(min);
            return maj;
        }
    }

    return gss_unwrap_aead(minor_status, ctx_handle->local,
                           input_message_buffer, input_assoc_buffer,
                           output_payload_buffer,
                           conf_state, qop_state);
}

OM_uint32 gssi_get_mic(OM_uint32 *minor_status,
                       gss_ctx_id_t context_handle,
                       gss_qop_t qop_req,
                       gss_buffer_t message_buffer,
                       gss_buffer_t message_token)
{
    struct gpp_context_handle *ctx_handle;
    OM_uint32 maj, min;

    GSSI_TRACE();

    ctx_handle = (struct gpp_context_handle *)context_handle;
    if (!ctx_handle) {
        return GSS_S_CALL_INACCESSIBLE_READ;
    }

    /* for now we do encryption only locally and only for specific known
     * mechanisms for which we can export/import the context */
    if (ctx_handle->remote && !ctx_handle->local) {
        maj = gpp_remote_to_local_ctx(&min, &ctx_handle->remote,
                                            &ctx_handle->local);
        if (maj != GSS_S_COMPLETE) {
            *minor_status = gpp_map_error(min);
            return maj;
        }
    }

    return gss_get_mic(minor_status,
                       ctx_handle->local,
                       qop_req,
                       message_buffer,
                       message_token);
}

OM_uint32 gssi_verify_mic(OM_uint32 *minor_status,
                          gss_ctx_id_t context_handle,
                          gss_buffer_t message_buffer,
                          gss_buffer_t message_token,
                          gss_qop_t *qop_state)
{
    struct gpp_context_handle *ctx_handle;
    OM_uint32 maj, min;

    GSSI_TRACE();

    ctx_handle = (struct gpp_context_handle *)context_handle;
    if (!ctx_handle) {
        return GSS_S_CALL_INACCESSIBLE_READ;
    }

    /* for now we do encryption only locally and only for specific known
     * mechanisms for which we can export/import the context */
    if (ctx_handle->remote && !ctx_handle->local) {
        maj = gpp_remote_to_local_ctx(&min, &ctx_handle->remote,
                                            &ctx_handle->local);
        if (maj != GSS_S_COMPLETE) {
            *minor_status = gpp_map_error(min);
            return maj;
        }
    }

    return gss_verify_mic(minor_status,
                          ctx_handle->local,
                          message_buffer,
                          message_token,
                          qop_state);
}