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! Copyright (c) 2020 Jeffrey Armstrong <jeff@rainbow-100.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 shall be used for Good, not Evil.
!
! 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.
! Just Enough SSL...
module jessl
implicit none
interface
subroutine library_init() bind(c, name="OPENSSL_init_ssl")
end subroutine library_init
subroutine add_ssl_algorithms() bind(c, name="SSLeay_add_ssl_algorithms")
end subroutine add_ssl_algorithms
subroutine load_error_strings() bind(c, name="SSL_load_error_strings")
end subroutine load_error_strings
function tls_client_method() bind(c, name="TLS_client_method")
use iso_c_binding
type(c_ptr)::tls_client_method
end function tls_client_method
function ctx_new(meth) bind(c, name="SSL_CTX_new")
use iso_c_binding
type(c_ptr)::ctx_new
type(c_ptr), value::meth
end function ctx_new
function ssl_new(ctx) bind(c, name="SSL_new")
use iso_c_binding
type(c_ptr)::ssl_new
type(c_ptr), value::ctx
end function ssl_new
function get_fd(ssl) bind(c, name="SSL_get_fd")
use iso_c_binding
integer(kind=c_int)::get_fd
type(c_ptr), value::ssl
end function get_fd
function set_fd(ssl, fd) bind(c, name="SSL_set_fd")
use iso_c_binding
integer(kind=c_int)::set_fd
integer(kind=c_int), value::fd
type(c_ptr), value::ssl
end function set_fd
function ssl_connect(ssl) bind(c, name="SSL_connect")
use iso_c_binding
integer(kind=c_int)::ssl_connect
type(c_ptr), value::ssl
end function ssl_connect
function ssl_shutdown(ssl) bind(c, name="SSL_shutdown")
use iso_c_binding
integer(kind=c_int)::ssl_shutdown
type(c_ptr), value::ssl
end function ssl_shutdown
function ssl_free(ssl) bind(c, name="SSL_free")
use iso_c_binding
integer(kind=c_int)::ssl_free
type(c_ptr), value::ssl
end function ssl_free
function ctx_free(ctx) bind(c, name="SSL_CTX_free")
use iso_c_binding
integer(kind=c_int)::ctx_free
type(c_ptr), value::ctx
end function ctx_free
! Actually a macro...
!function get_cipher_c(ssl) bind(c, name="SSL_get_cipher_name")
!use iso_c_binding
!type(c_ptr)::get_cipher_c
!type(c_ptr), value::ssl
!end function get_cipher_c
function read_c(ssl, buf, length) bind(c, name="SSL_read")
use iso_c_binding
type(c_ptr), value::ssl
character(kind=c_char), dimension(*), intent(inout)::buf
integer(kind=c_int), value::length
integer(kind=c_int)::read_c
end function read_c
function write_c(ssl, buf, length) bind(c, name="SSL_write")
use iso_c_binding
type(c_ptr), value::ssl
character(kind=c_char), dimension(*), intent(inout)::buf
integer(kind=c_int), value::length
integer(kind=c_int)::write_c
end function write_c
function get_error(ssl, retcode) bind(c, name="SSL_get_error")
use iso_c_binding
type(c_ptr), value::ssl
integer(kind=c_int), value::retcode
integer(kind=c_int)::get_error
end function get_error
function ssl_pending(ssl) bind(c, name="SSL_pending")
use iso_c_binding
type(c_ptr), value::ssl
integer(kind=c_int)::ssl_pending
end function ssl_pending
end interface
contains
function ssl_read(ssl, buf)
use iso_c_binding
implicit none
type(c_ptr)::ssl
character, dimension(:), intent(inout)::buf
integer::ssl_read
integer::bufsize
character(kind=c_char), dimension(:), allocatable::cbuf
bufsize = size(buf)
allocate(cbuf(bufsize))
ssl_read = read_c(ssl, cbuf, 1)
buf = cbuf
deallocate(cbuf)
end function ssl_read
function ssl_write(ssl, buf)
use iso_c_binding
implicit none
type(c_ptr)::ssl
character, dimension(:), intent(in)::buf
integer::ssl_write
character(kind=c_char), dimension(:), allocatable::cbuf
allocate(cbuf(size(buf)))
cbuf = buf
cbuf(size(buf)) = c_null_char
ssl_write = write_c(ssl, cbuf, size(buf))
deallocate(cbuf)
end function ssl_write
subroutine get_cipher(ssl, res)
use iso_c_binding
implicit none
character(:), allocatable, intent(out)::res
type(c_ptr)::ssl
type(c_ptr)::cptr
character(kind=c_char), dimension(:), pointer::cstring
integer::i
cptr = c_null_ptr
if(.not. c_associated(cptr)) then
allocate(character(len=1)::res)
res = " "
else
call c_f_pointer(cptr, cstring, [1])
i = 1
do while(cstring(i) /= c_null_char)
i = i + 1
end do
allocate(character(len=(i-1))::res)
i = 1
do while(cstring(i) /= c_null_char)
res(i:i) = cstring(i)
end do
end if
end subroutine get_cipher
end module jessl
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