diff --git a/Cargo.lock b/Cargo.lock
index 08a7e8d9..0754c971 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -21,6 +21,14 @@ name = "antidote"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "arrayvec"
+version = "0.4.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "atty"
 version = "0.2.11"
@@ -95,6 +103,15 @@ name = "byteorder"
 version = "1.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "bytes"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "iovec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "c2-chacha"
 version = "0.2.2"
@@ -133,6 +150,14 @@ dependencies = [
  "vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "cloudabi"
+version = "0.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "cookie"
 version = "0.11.0"
@@ -144,6 +169,59 @@ dependencies = [
  "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "core-foundation"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "core-foundation-sys 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "core-foundation-sys"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "crossbeam-deque"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "crossbeam-epoch 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "arrayvec 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memoffset 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "scopeguard 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "crossbeam-queue"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.6.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "devise"
 version = "0.2.0"
@@ -224,6 +302,24 @@ dependencies = [
  "redox_syscall 0.1.51 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "fnv"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "foreign-types"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "foreign-types-shared 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "foreign-types-shared"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "fsevent"
 version = "0.2.17"
@@ -242,6 +338,11 @@ dependencies = [
  "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "fuchsia-cprng"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "fuchsia-zircon"
 version = "0.3.3"
@@ -256,6 +357,11 @@ name = "fuchsia-zircon-sys"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "futures"
+version = "0.1.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "gcc"
 version = "0.3.55"
@@ -404,6 +510,40 @@ name = "lazycell"
 version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "lber"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nom 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "ldap3"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lber 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "native-tls 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nom 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-codec 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-core 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-io 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-proto 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-service 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-tls 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-uds 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-uds-proto 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "libc"
 version = "0.2.60"
@@ -419,6 +559,15 @@ dependencies = [
  "vcpkg 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "lock_api"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "owning_ref 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "log"
 version = "0.3.9"
@@ -445,6 +594,14 @@ name = "memchr"
 version = "2.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "memoffset"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "mime"
 version = "0.2.6"
@@ -482,6 +639,16 @@ dependencies = [
  "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "mio-uds"
+version = "0.6.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "iovec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "mio 0.6.16 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "miow"
 version = "0.2.1"
@@ -498,6 +665,23 @@ name = "mock-it"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "native-tls"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl 0.10.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-probe 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.9.49 (registry+https://github.com/rust-lang/crates.io-index)",
+ "schannel 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
+ "security-framework 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "security-framework-sys 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "net2"
 version = "0.2.33"
@@ -533,6 +717,16 @@ dependencies = [
  "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "nodrop"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "nom"
+version = "2.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "notify"
 version = "4.0.9"
@@ -572,6 +766,65 @@ dependencies = [
  "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "openssl"
+version = "0.10.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "foreign-types 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.9.49 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "openssl-probe"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "openssl-sys"
+version = "0.9.49"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.29 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vcpkg 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "owning_ref"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "parking_lot"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lock_api 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "pear"
 version = "0.1.2"
@@ -608,6 +861,7 @@ dependencies = [
  "get_if_addrs 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "hostname 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ldap3 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "libsqlite3-sys 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "mock-it 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -669,6 +923,45 @@ dependencies = [
  "scheduled-thread-pool 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "rand"
+version = "0.3.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand"
+version = "0.6.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_chacha 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_hc 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_isaac 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_jitter 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_os 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_pcg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_xorshift 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "rand"
 version = "0.7.0"
@@ -681,6 +974,15 @@ dependencies = [
  "rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "rand_chacha"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "rand_chacha"
 version = "0.2.0"
@@ -691,6 +993,19 @@ dependencies = [
  "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "rand_core"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "rand_core"
 version = "0.5.0"
@@ -699,6 +1014,14 @@ dependencies = [
  "getrandom 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "rand_hc"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "rand_hc"
 version = "0.2.0"
@@ -707,6 +1030,62 @@ dependencies = [
  "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "rand_isaac"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_jitter"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_os"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_pcg"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_xorshift"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rdrand"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "redox_syscall"
 version = "0.1.51"
@@ -893,6 +1272,14 @@ dependencies = [
  "semver 0.1.20 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "rustc_version"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "ryu"
 version = "1.0.0"
@@ -911,6 +1298,15 @@ dependencies = [
  "winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "schannel"
+version = "0.1.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
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@@ -919,11 +1315,58 @@ dependencies = [
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 [[package]]
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@@ -958,11 +1401,21 @@ dependencies = [
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@@ -973,6 +1426,11 @@ name = "spin"
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+"checksum stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "dba1a27d3efae4351c8051072d619e3ade2820635c3958d826bfea39d59b54c8"
 "checksum state 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7345c971d1ef21ffdbd103a75990a15eb03604fc8b8852ca8cb418ee1a099028"
 "checksum strsim 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bb4f380125926a99e52bc279241539c018323fab05ad6368b56f93d9369ff550"
 "checksum structopt 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)" = "16c2cdbf9cc375f15d1b4141bc48aeef444806655cd0e904207edc8d68d86ed7"
@@ -1407,12 +2173,32 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum syn 0.15.26 (registry+https://github.com/rust-lang/crates.io-index)" = "f92e629aa1d9c827b2bb8297046c1ccffc57c99b947a680d3ccff1f136a3bee9"
 "checksum synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a393066ed9010ebaed60b9eafa373d4b1baac186dd7e008555b0f702b51945b6"
 "checksum synstructure 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)" = "73687139bf99285483c96ac0add482c3776528beac1d97d444f6e91f203a2015"
+"checksum take 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b157868d8ac1f56b64604539990685fa7611d8fa9e5476cf0c02cf34d32917c5"
 "checksum task_scheduler 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "023ced5b7293f7d605c6542c8f4710d9fa57be380de83f3195d73c9c3438fba7"
 "checksum tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
 "checksum termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"
 "checksum textwrap 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "307686869c93e71f94da64286f9a9524c0f308a9e1c87a583de8e9c9039ad3f6"
 "checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
 "checksum time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "db8dcfca086c1143c9270ac42a2bbd8a7ee477b78ac8e45b19abfb0cbede4b6f"
+"checksum tokio 0.1.22 (registry+https://github.com/rust-lang/crates.io-index)" = "5a09c0b5bb588872ab2f09afa13ee6e9dac11e10a0ec9e8e3ba39a5a5d530af6"
+"checksum tokio-codec 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5c501eceaf96f0e1793cf26beb63da3d11c738c4a943fdf3746d81d64684c39f"
+"checksum tokio-core 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)" = "aeeffbbb94209023feaef3c196a41cbcdafa06b4a6f893f68779bb5e53796f71"
+"checksum tokio-current-thread 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "d16217cad7f1b840c5a97dfb3c43b0c871fef423a6e8d2118c604e843662a443"
+"checksum tokio-executor 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "0f27ee0e6db01c5f0b2973824547ce7e637b2ed79b891a9677b0de9bd532b6ac"
+"checksum tokio-fs 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "3fe6dc22b08d6993916647d108a1a7d15b9cd29c4f4496c62b92c45b5041b7af"
+"checksum tokio-io 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)" = "5090db468dad16e1a7a54c8c67280c5e4b544f3d3e018f0b913b400261f85926"
+"checksum tokio-proto 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8fbb47ae81353c63c487030659494b295f6cb6576242f907f203473b191b0389"
+"checksum tokio-reactor 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "6af16bfac7e112bea8b0442542161bfc41cbfa4466b580bdda7d18cb88b911ce"
+"checksum tokio-service 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "24da22d077e0f15f55162bdbdc661228c1581892f52074fb242678d015b45162"
+"checksum tokio-sync 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "2162248ff317e2bc713b261f242b69dbb838b85248ed20bb21df56d60ea4cae7"
+"checksum tokio-tcp 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "1d14b10654be682ac43efee27401d792507e30fd8d26389e1da3b185de2e4119"
+"checksum tokio-threadpool 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)" = "90ca01319dea1e376a001e8dc192d42ebde6dd532532a5bad988ac37db365b19"
+"checksum tokio-timer 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "f2106812d500ed25a4f38235b9cae8f78a09edf43203e16e59c3b769a342a60e"
+"checksum tokio-tls 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "354b8cd83825b3c20217a9dc174d6a0c67441a2fae5c41bcb1ea6679f6ae0f7c"
+"checksum tokio-udp 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "f02298505547f73e60f568359ef0d016d5acd6e830ab9bc7c4a5b3403440121b"
+"checksum tokio-uds 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "65ae5d255ce739e8537221ed2942e0445f4b3b813daebac1c0050ddaaa3587f9"
+"checksum tokio-uds 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "037ffc3ba0e12a0ab4aca92e5234e0dedeb48fddf6ccd260f1f150a36a9f2445"
+"checksum tokio-uds-proto 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "93842f83f760d2a48eb54225f819d05549e69c481f56be4a1b1f51decf99da5b"
 "checksum toml 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)" = "758664fc71a3a69038656bee8b6be6477d2a6c315a6b81f7081f591bffa4111f"
 "checksum toml 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b8c96d7873fa7ef8bdeb3a9cda3ac48389b4154f32b9803b4bc26220b677b039"
 "checksum traitobject 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "efd1f82c56340fdf16f2a953d7bda4f8fdffba13d93b00844c25572110b26079"
diff --git a/Cargo.toml b/Cargo.toml
index fe970a1c..598b9a00 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,10 +36,10 @@ nix = "0.14"
 base64 = "0.10"
 task_scheduler = "0.2.0"
 structopt = "0.2.18"
-
 # Statically link SQLite (use the crate version provided by Diesel)
 # The highest version which Diesel currently allows is 0.12.0
 libsqlite3-sys = { version = "0.12.0", features = ["bundled"] }
+ldap3 = "0.6.1"
 
 [dev-dependencies]
 serde_json = "1.0"
diff --git a/src/env/config/ldap.rs b/src/env/config/ldap.rs
new file mode 100644
index 00000000..728012ee
--- /dev/null
+++ b/src/env/config/ldap.rs
@@ -0,0 +1,67 @@
+// Pi-hole: A black hole for Internet advertisements
+// (c) 2019 Pi-hole, LLC (https://pi-hole.net)
+// Network-wide ad blocking via your own hardware.
+//
+// API
+// LDAP Config
+//
+// This file is copyright under the latest version of the EUPL.
+// Please see LICENSE file for your rights under this license.
+
+/// Configuration settings for LDAP authentication
+#[derive(Deserialize, Clone)]
+pub struct LdapConfig {
+    /// If LDAP should be enabled
+    #[serde(default = "default_enabled")]
+    pub enabled: bool,
+
+    /// LDAP server address
+    #[serde(default = "default_address")]
+    pub address: String,
+
+    /// Bind Dn
+    #[serde(default = "default_bind_dn")]
+    pub bind_dn: String
+}
+
+impl Default for LdapConfig {
+    fn default() -> Self {
+        LdapConfig {
+            enabled: default_enabled(),
+            address: default_address(),
+            bind_dn: default_bind_dn()
+        }
+    }
+}
+
+impl LdapConfig {
+    pub fn is_valid(&self) -> bool {
+        true
+    }
+}
+
+fn default_enabled() -> bool {
+    false
+}
+
+fn default_address() -> String {
+    "ldap://localhost:389".to_owned()
+}
+
+fn default_bind_dn() -> String {
+    "".to_owned()
+}
+
+#[cfg(test)]
+mod test {
+    use super::LdapConfig;
+
+    /// The default config is valid
+    #[test]
+    fn valid_ldap() {
+        let ldap_config = LdapConfig::default();
+
+        assert!(ldap_config.is_valid())
+    }
+
+}
diff --git a/src/env/config/mod.rs b/src/env/config/mod.rs
index 996bfa67..3373dce0 100644
--- a/src/env/config/mod.rs
+++ b/src/env/config/mod.rs
@@ -12,5 +12,6 @@ mod file_locations;
 mod general;
 mod root_config;
 mod web;
+mod ldap;
 
 pub use self::root_config::Config;
diff --git a/src/env/config/root_config.rs b/src/env/config/root_config.rs
index da94df6c..16455cfe 100644
--- a/src/env/config/root_config.rs
+++ b/src/env/config/root_config.rs
@@ -9,7 +9,7 @@
 // Please see LICENSE file for your rights under this license.
 
 use crate::{
-    env::config::{file_locations::Files, general::General, web::WebConfig},
+    env::config::{file_locations::Files, general::General, web::WebConfig, ldap::LdapConfig},
     util::{Error, ErrorKind}
 };
 use failure::{Fail, ResultExt};
@@ -29,7 +29,9 @@ pub struct Config {
     #[serde(default)]
     pub file_locations: Files,
     #[serde(default)]
-    pub web: WebConfig
+    pub web: WebConfig,
+    #[serde(default)]
+    pub ldap: LdapConfig
 }
 
 impl Config {
diff --git a/src/routes/auth.rs b/src/routes/auth.rs
index 62f0000a..61dc16fc 100644
--- a/src/routes/auth.rs
+++ b/src/routes/auth.rs
@@ -8,16 +8,22 @@
 // This file is copyright under the latest version of the EUPL.
 // Please see LICENSE file for your rights under this license.
 
-use crate::util::{reply_success, Error, ErrorKind, Reply};
+use ldap3::LdapConn;
+use crate::{
+    env::Env
+};
+use crate::util::{reply_success, reply_data, Error, ErrorKind, Reply};
 use rocket::{
     http::{Cookie, Cookies},
     request::{self, FromRequest, Request, State},
     Outcome
 };
 use std::sync::atomic::{AtomicUsize, Ordering};
+use failure::ResultExt;
 
 const USER_ATTR: &str = "user_id";
 const AUTH_HEADER: &str = "X-Pi-hole-Authenticate";
+const AUTH_HEADER_USERNAME: &str = "X-Pi-hole-Authenticate-username";
 
 /// When used as a request guard, requests must be authenticated
 pub struct User {
@@ -30,6 +36,11 @@ pub struct AuthData {
     next_id: AtomicUsize
 }
 
+#[derive(Serialize)]
+pub struct AuthMode {
+    pub mode: String
+}
+
 impl User {
     /// Try to get the user ID from cookies
     fn get_from_cookie(cookies: &mut Cookies) -> Option<Self> {
@@ -75,27 +86,66 @@ impl<'a, 'r> FromRequest<'a, 'r> for User {
             None => return Error::from(ErrorKind::Unknown).into_outcome()
         };
 
-        // Check if a key is required for authentication
-        if !auth_data.key_required() {
-            return Outcome::Success(User::create_and_store_user(request, &auth_data));
-        }
+        let key_opt = request.headers().get_one(AUTH_HEADER);
+        let env: State<Env> = match request.guard().succeeded() {
+            Some(env) => env,
+            None => return Error::from(ErrorKind::Unknown).into_outcome()
+        };
+        let ldap_config = &env.config().ldap;
 
-        // Check the user's key, if provided
-        if let Some(key) = request.headers().get_one(AUTH_HEADER) {
-            if auth_data.key_matches(key) {
-                // The key matches, so create and store a new user and cookie
-                Outcome::Success(Self::create_and_store_user(request, &auth_data))
-            } else {
-                // The key does not match
-                Error::from(ErrorKind::Unauthorized).into_outcome()
+        if ldap_config.enabled {
+            println!("LDAP is enabled");
+            let key = match key_opt {
+                Some(key) => key,
+                None => return Error::from(ErrorKind::LdapMissingKey).into_outcome()
+            };
+            let username = match request.headers().get_one(AUTH_HEADER_USERNAME) {
+                Some(username) => username,
+                None => return Error::from(ErrorKind::LdapMissingUsername).into_outcome()
+            };
+
+            match ldap_login(&ldap_config.address, &ldap_config.bind_dn, username, key) {
+                Ok(_) => Outcome::Success(User::create_and_store_user(request, &auth_data)),
+                Err(e) => e.into_outcome()
             }
+
         } else {
+            
+            // Check if a key is required for authentication
+            if !auth_data.key_required() {
+                return Outcome::Success(User::create_and_store_user(request, &auth_data));
+            }
+
+            // Check the user's key, if provided
+            if let Some(key) = key_opt {
+                if auth_data.key_matches(key) {
+                    // The key matches, so create and store a new user and cookie
+                    Outcome::Success(Self::create_and_store_user(request, &auth_data))
+                } else {
+                    // The key does not match
+                    Error::from(ErrorKind::Unauthorized).into_outcome()
+                }
+            } else {
             // A key is required but not provided
-            Error::from(ErrorKind::Unauthorized).into_outcome()
+                Error::from(ErrorKind::Unauthorized).into_outcome()
+            } 
+
         }
     }
 }
 
+fn ldap_login(ldap_address: &str, bind_dn: &str, username: &str, key: &str) -> Result<(), Error> {
+    println!("LDAP address: {}, user: {}", ldap_address, username);
+    let bind_dn = bind_dn.replace("{}", username);
+    LdapConn::new(&ldap_address)
+        .map_err(|e| ErrorKind::LdapConnectError(format!("{:?}", e)))?
+        .simple_bind(&bind_dn, key)
+        .map_err(|e| ErrorKind::LdapBindError(format!("{:?}", e)))?
+        .success()
+        .context(ErrorKind::LdapUnauthorized)?;
+    Ok(())
+}
+
 impl AuthData {
     /// Create a new API key
     pub fn new(key: Option<String>) -> AuthData {
@@ -127,6 +177,17 @@ impl AuthData {
         }
     }
 }
+/// Get current auth mode (key/ldap) for UI to show corresponding controls
+#[get("/auth/mode")]
+pub fn get_auth_mode(env: State<Env>) -> Reply {
+    let ldap_config = &env.config().ldap;
+    let mode = if ldap_config.enabled {
+        "ldap" 
+    } else {
+        "key"
+    };
+    reply_data(AuthMode { mode: mode.to_owned() })
+}
 
 /// Provides an endpoint to authenticate or check if already authenticated
 #[get("/auth")]
diff --git a/src/setup.rs b/src/setup.rs
index 3255f232..2785f0a7 100644
--- a/src/setup.rs
+++ b/src/setup.rs
@@ -165,6 +165,7 @@ fn setup(
         // Mount the API
         .mount(&api_mount_path_str, routes![
             version::version,
+            auth::get_auth_mode,
             auth::check,
             auth::logout,
             stats::get_summary,
diff --git a/src/util.rs b/src/util.rs
index dd7efd07..5bdcd97c 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -151,7 +151,17 @@ pub enum ErrorKind {
     #[fail(display = "Error while interacting with the FTL database")]
     FtlDatabase,
     #[fail(display = "Error while interacting with the Gravity database")]
-    GravityDatabase
+    GravityDatabase,
+    #[fail(display = "Missing key")]
+    LdapMissingKey,
+    #[fail(display = "Missing username")]
+    LdapMissingUsername,
+    #[fail(display = "Bind error: {}", _0)]
+    LdapBindError(String),
+    #[fail(display = "Unauthorized")]
+    LdapUnauthorized,
+    #[fail(display = "Connection error: {}", _0)]
+    LdapConnectError(String)
 }
 
 impl Error {
@@ -239,7 +249,12 @@ impl ErrorKind {
             ErrorKind::SharedMemoryLock => "shared_memory_lock",
             ErrorKind::SharedMemoryVersion(_, _) => "shared_memory_version",
             ErrorKind::FtlDatabase => "ftl_database",
-            ErrorKind::GravityDatabase => "gravity_database"
+            ErrorKind::GravityDatabase => "gravity_database",
+            ErrorKind::LdapMissingKey => "ldap_missing_key",
+            ErrorKind::LdapMissingUsername => "ldap_missing_username",
+            ErrorKind::LdapConnectError(_) => "ldap_connection_error",
+            ErrorKind::LdapBindError(_) => "ldap_bind_error",
+            ErrorKind::LdapUnauthorized => "ldap_unauthorized"
         }
     }
 
@@ -251,7 +266,7 @@ impl ErrorKind {
             ErrorKind::InvalidDomain | ErrorKind::BadRequest | ErrorKind::InvalidSettingValue => {
                 Status::BadRequest
             }
-            ErrorKind::Unauthorized => Status::Unauthorized,
+            ErrorKind::Unauthorized |  ErrorKind::LdapUnauthorized => Status::Unauthorized,
             ErrorKind::Unknown
             | ErrorKind::GravityError
             | ErrorKind::FtlConnectionFail
@@ -268,7 +283,12 @@ impl ErrorKind {
             | ErrorKind::SharedMemoryLock
             | ErrorKind::SharedMemoryVersion(_, _)
             | ErrorKind::FtlDatabase
-            | ErrorKind::GravityDatabase => Status::InternalServerError
+            | ErrorKind::GravityDatabase
+            | ErrorKind::LdapBindError(_)
+            | ErrorKind::LdapConnectError(_)
+            | ErrorKind::LdapMissingUsername
+            | ErrorKind::LdapMissingKey
+            => Status::InternalServerError
         }
     }