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v/vlib/net/openssl/ssl_connection.v
2022-04-15 18:25:45 +03:00

269 lines
6.1 KiB
V

module openssl
import net
import time
// SSLConn is the current connection
pub struct SSLConn {
mut:
sslctx &C.SSL_CTX
ssl &C.SSL
handle int
duration time.Duration
}
// new_ssl_conn instance an new SSLCon struct
pub fn new_ssl_conn() &SSLConn {
return &SSLConn{
sslctx: 0
ssl: 0
handle: 0
}
}
// Select operation
enum Select {
read
write
except
}
// shutdown closes the ssl connection and does cleanup
pub fn (mut s SSLConn) shutdown() ? {
if s.ssl != 0 {
mut res := 0
for {
res = C.SSL_shutdown(voidptr(s.ssl))
if res < 0 {
err_res := ssl_error(res, s.ssl) or {
break // We break to free rest of resources
}
if err_res == .ssl_error_want_read {
for {
ready := @select(s.handle, .read, s.duration) ?
if ready {
break
}
}
continue
} else if err_res == .ssl_error_want_write {
for {
ready := @select(s.handle, .write, s.duration) ?
if ready {
break
}
}
continue
} else {
unsafe { C.SSL_free(voidptr(s.ssl)) }
if s.sslctx != 0 {
C.SSL_CTX_free(s.sslctx)
}
return error('unexepedted ssl error $err_res')
}
if s.ssl != 0 {
unsafe { C.SSL_free(voidptr(s.ssl)) }
}
if s.sslctx != 0 {
C.SSL_CTX_free(s.sslctx)
}
return error('Could not connect using SSL. ($err_res),err')
} else if res == 0 {
continue
} else if res == 1 {
break
}
}
C.SSL_free(voidptr(s.ssl))
}
if s.sslctx != 0 {
C.SSL_CTX_free(s.sslctx)
}
}
// connect to server using OpenSSL
pub fn (mut s SSLConn) connect(mut tcp_conn net.TcpConn, hostname string) ? {
s.handle = tcp_conn.sock.handle
s.duration = tcp_conn.read_timeout()
s.sslctx = unsafe { C.SSL_CTX_new(C.SSLv23_client_method()) }
if s.sslctx == 0 {
return error("Couldn't get ssl context")
}
// TODO: Fix option to enable/disable checks for valid
// certificates to allow both secure and self signed
// for now the checks are not done at all to comply
// to current autobahn tests
// C.SSL_CTX_set_verify_depth(s.sslctx, 4)
// flags := C.SSL_OP_NO_SSLv2 | C.SSL_OP_NO_SSLv3 | C.SSL_OP_NO_COMPRESSION
// C.SSL_CTX_set_options(s.sslctx, flags)
// mut res := C.SSL_CTX_load_verify_locations(s.sslctx, 'random-org-chain.pem', 0)
s.ssl = unsafe { &C.SSL(C.SSL_new(s.sslctx)) }
if s.ssl == 0 {
return error("Couldn't create OpenSSL instance.")
}
// preferred_ciphers := 'HIGH:!aNULL:!kRSA:!PSK:!SRP:!MD5:!RC4'
// mut res := C.SSL_set_cipher_list(s.ssl, preferred_ciphers.str)
// if res != 1 {
// println('http: openssl: cipher failed')
// }
mut res := C.SSL_set_tlsext_host_name(voidptr(s.ssl), voidptr(hostname.str))
if res != 1 {
return error('cannot set host name')
}
if C.SSL_set_fd(voidptr(s.ssl), tcp_conn.sock.handle) != 1 {
return error("Couldn't assign ssl to socket.")
}
for {
res = C.SSL_connect(voidptr(s.ssl))
if res != 1 {
err_res := ssl_error(res, s.ssl) ?
if err_res == .ssl_error_want_read {
for {
ready := @select(s.handle, .read, s.duration) ?
if ready {
break
}
}
continue
} else if err_res == .ssl_error_want_write {
for {
ready := @select(s.handle, .write, s.duration) ?
if ready {
break
}
}
continue
}
return error('Could not connect using SSL. ($err_res),err')
}
break
}
}
pub fn (mut s SSLConn) socket_read_into_ptr(buf_ptr &u8, len int) ?int {
mut res := 0
for {
res = C.SSL_read(voidptr(s.ssl), buf_ptr, len)
if res < 0 {
err_res := ssl_error(res, s.ssl) ?
if err_res == .ssl_error_want_read {
for {
ready := @select(s.handle, .read, s.duration) ?
if ready {
break
}
}
continue
} else if err_res == .ssl_error_want_write {
for {
ready := @select(s.handle, .write, s.duration) ?
if ready {
break
}
}
continue
} else if err_res == .ssl_error_zero_return {
return 0
}
return error('Could not read using SSL. ($err_res)')
}
break
}
return res
}
pub fn (mut s SSLConn) read(mut buffer []u8) ?int {
res := s.socket_read_into_ptr(&u8(buffer.data), buffer.len) ?
return res
}
// write number of bytes to SSL connection
pub fn (mut s SSLConn) write(bytes []u8) ?int {
unsafe {
mut ptr_base := &u8(bytes.data)
mut total_sent := 0
for total_sent < bytes.len {
ptr := ptr_base + total_sent
remaining := bytes.len - total_sent
mut sent := C.SSL_write(voidptr(s.ssl), ptr, remaining)
if sent <= 0 {
err_res := ssl_error(sent, s.ssl) ?
if err_res == .ssl_error_want_read {
for {
ready := @select(s.handle, .read, s.duration) ?
if ready {
break
}
}
} else if err_res == .ssl_error_want_write {
for {
ready := @select(s.handle, .write, s.duration) ?
if ready {
break
}
}
continue
} else if err_res == .ssl_error_zero_return {
return error('ssl write on closed connection') // Todo error_with_code close
}
return error_with_code('Could not write SSL. ($err_res),err', int(err_res))
}
total_sent += sent
}
return total_sent
}
}
/*
This is basically a copy of Emily socket implementation of select.
This have to be consolidated into common net lib features
when merging this to V
*/
// [typedef]
// pub struct C.fd_set {
// }
// Select waits for an io operation (specified by parameter `test`) to be available
fn @select(handle int, test Select, timeout time.Duration) ?bool {
set := C.fd_set{}
C.FD_ZERO(&set)
C.FD_SET(handle, &set)
seconds := timeout.milliseconds() / 1000
microseconds := timeout - (seconds * time.second)
mut tt := C.timeval{
tv_sec: u64(seconds)
tv_usec: u64(microseconds)
}
mut timeval_timeout := &tt
// infinite timeout is signaled by passing null as the timeout to
// select
if timeout == net.infinite_timeout {
timeval_timeout = &C.timeval(0)
}
match test {
.read {
net.socket_error(C.@select(handle + 1, &set, C.NULL, C.NULL, timeval_timeout)) ?
}
.write {
net.socket_error(C.@select(handle + 1, C.NULL, &set, C.NULL, timeval_timeout)) ?
}
.except {
net.socket_error(C.@select(handle + 1, C.NULL, C.NULL, &set, timeval_timeout)) ?
}
}
return C.FD_ISSET(handle, &set)
}