diff --git a/src/hashsum/Cargo.toml b/src/hashsum/Cargo.toml
index f4728dd84..9f30881a6 100644
--- a/src/hashsum/Cargo.toml
+++ b/src/hashsum/Cargo.toml
@@ -8,12 +8,16 @@ name = "uu_hashsum"
 path = "hashsum.rs"
 
 [dependencies]
+digest = "0.6.2"
 getopts = "0.2.14"
 libc = "0.2.26"
+md5 = "0.3.5"
 regex = "0.2.2"
 regex-syntax = "0.4.1"
-rust-crypto = "0.2.36"
 rustc-serialize = "0.3.24"
+sha1 = "0.2.0"
+sha2 = "0.6.0"
+sha3 = "0.6.0"
 uucore = { path="../uucore" }
 
 [[bin]]
diff --git a/src/hashsum/digest.rs b/src/hashsum/digest.rs
index e4d8356ec..098d5abe4 100644
--- a/src/hashsum/digest.rs
+++ b/src/hashsum/digest.rs
@@ -1,13 +1,15 @@
-extern crate crypto;
+extern crate digest;
+extern crate md5;
 extern crate rustc_serialize;
+extern crate sha1;
+extern crate sha2;
+extern crate sha3;
 
-use crypto::md5::Md5;
-use crypto::sha1::Sha1;
-use crypto::sha2::{Sha224, Sha256, Sha384, Sha512};
-use crypto::sha3::Sha3;
-use crypto::digest::Digest as CryptoDigest;
+use sha2::Digest as Sha2Digest;
+use digest::digest::{Input, ExtendableOutput, XofReader};
 
 pub trait Digest {
+    fn new() -> Self where Self: Sized;
     fn input(&mut self, input: &[u8]);
     fn result(&mut self, out: &mut [u8]);
     fn reset(&mut self);
@@ -24,114 +26,242 @@ pub trait Digest {
     }
 }
 
-impl Digest for Md5 {
+impl Digest for md5::Context {
+    fn new() -> Self {
+        md5::Context::new()
+    }
+
     fn input(&mut self, input: &[u8]) {
-        CryptoDigest::input(self, input)
+        self.consume(input)
     }
 
     fn result(&mut self, out: &mut [u8]) {
-        CryptoDigest::result(self, out)
+        out.copy_from_slice(&*self.compute());
     }
 
     fn reset(&mut self) {
-        CryptoDigest::reset(self)
+        *self = md5::Context::new();
     }
 
-    fn output_bits(&self) -> usize { CryptoDigest::output_bits(self) }
+    fn output_bits(&self) -> usize { 128 }
 }
 
-impl Digest for Sha1 {
+impl Digest for sha1::Sha1 {
+    fn new() -> Self {
+        sha1::Sha1::new()
+    }
+
     fn input(&mut self, input: &[u8]) {
-        CryptoDigest::input(self, input)
+        self.update(input);
     }
 
     fn result(&mut self, out: &mut [u8]) {
-        CryptoDigest::result(self, out)
+        out.copy_from_slice(&self.digest().bytes());
     }
 
     fn reset(&mut self) {
-        CryptoDigest::reset(self)
+        self.reset();
     }
 
-    fn output_bits(&self) -> usize { CryptoDigest::output_bits(self) }
+    fn output_bits(&self) -> usize { 160 }
 }
 
-impl Digest for Sha224 {
+impl Digest for sha2::Sha224 {
+    fn new() -> Self {
+        sha2::Sha224::default()
+    }
+
     fn input(&mut self, input: &[u8]) {
-        CryptoDigest::input(self, input)
+        Sha2Digest::input(self, input);
     }
 
     fn result(&mut self, out: &mut [u8]) {
-        CryptoDigest::result(self, out)
+        out.copy_from_slice(Sha2Digest::result(*self).as_slice());
     }
 
     fn reset(&mut self) {
-        CryptoDigest::reset(self)
+        *self = sha2::Sha224::default();
     }
 
-    fn output_bits(&self) -> usize { CryptoDigest::output_bits(self) }
+    fn output_bits(&self) -> usize { 224 }
 }
 
-impl Digest for Sha256 {
+impl Digest for sha2::Sha256 {
+    fn new() -> Self {
+        sha2::Sha256::default()
+    }
+
     fn input(&mut self, input: &[u8]) {
-        CryptoDigest::input(self, input)
+        Sha2Digest::input(self, input);
     }
 
     fn result(&mut self, out: &mut [u8]) {
-        CryptoDigest::result(self, out)
+        out.copy_from_slice(Sha2Digest::result(*self).as_slice());
     }
 
     fn reset(&mut self) {
-        CryptoDigest::reset(self)
+        *self = sha2::Sha256::default();
     }
 
-    fn output_bits(&self) -> usize { CryptoDigest::output_bits(self) }
+    fn output_bits(&self) -> usize { 256 }
 }
 
-impl Digest for Sha384 {
+impl Digest for sha2::Sha384 {
+    fn new() -> Self {
+        sha2::Sha384::default()
+    }
+
     fn input(&mut self, input: &[u8]) {
-        CryptoDigest::input(self, input)
+        Sha2Digest::input(self, input)
     }
 
     fn result(&mut self, out: &mut [u8]) {
-        CryptoDigest::result(self, out)
+        out.copy_from_slice(Sha2Digest::result(*self).as_slice());
     }
 
     fn reset(&mut self) {
-        CryptoDigest::reset(self)
+        *self = sha2::Sha384::default();
     }
 
-    fn output_bits(&self) -> usize { CryptoDigest::output_bits(self) }
+    fn output_bits(&self) -> usize { 384 }
 }
 
-impl Digest for Sha512 {
+impl Digest for sha2::Sha512 {
+    fn new() -> Self {
+        sha2::Sha512::default()
+    }
+
     fn input(&mut self, input: &[u8]) {
-        CryptoDigest::input(self, input)
+        Sha2Digest::input(self, input)
     }
 
     fn result(&mut self, out: &mut [u8]) {
-        CryptoDigest::result(self, out)
+        out.copy_from_slice(Sha2Digest::result(*self).as_slice());
     }
 
     fn reset(&mut self) {
-        CryptoDigest::reset(self)
+        *self = sha2::Sha512::default();
     }
 
-    fn output_bits(&self) -> usize { CryptoDigest::output_bits(self) }
+    fn output_bits(&self) -> usize { 512 }
 }
 
-impl Digest for Sha3 {
+impl Digest for sha3::Sha3_224 {
+    fn new() -> Self {
+        Self::default()
+    }
+
     fn input(&mut self, input: &[u8]) {
-        CryptoDigest::input(self, input)
+        digest::Digest::input(self, input)
     }
 
     fn result(&mut self, out: &mut [u8]) {
-        CryptoDigest::result(self, out)
+        out.copy_from_slice(digest::Digest::result(*self).as_slice());
     }
 
     fn reset(&mut self) {
-        CryptoDigest::reset(self)
+        *self = Self::default();
     }
 
-    fn output_bits(&self) -> usize { CryptoDigest::output_bits(self) }
+    fn output_bits(&self) -> usize { 224 }
+}
+
+impl Digest for sha3::Sha3_256 {
+    fn new() -> Self {
+        sha3::Sha3_256::default()
+    }
+
+    fn input(&mut self, input: &[u8]) {
+        digest::Digest::input(self, input)
+    }
+
+    fn result(&mut self, out: &mut [u8]) {
+        out.copy_from_slice(digest::Digest::result(*self).as_slice());
+    }
+
+    fn reset(&mut self) {
+        *self = sha3::Sha3_256::default();
+    }
+
+    fn output_bits(&self) -> usize { 256 }
+}
+
+impl Digest for sha3::Sha3_384 {
+    fn new() -> Self {
+        sha3::Sha3_384::default()
+    }
+
+    fn input(&mut self, input: &[u8]) {
+        digest::Digest::input(self, input)
+    }
+
+    fn result(&mut self, out: &mut [u8]) {
+        out.copy_from_slice(digest::Digest::result(*self).as_slice());
+    }
+
+    fn reset(&mut self) {
+        *self = sha3::Sha3_384::default();
+    }
+
+    fn output_bits(&self) -> usize { 384 }
+}
+
+impl Digest for sha3::Sha3_512 {
+    fn new() -> Self {
+        sha3::Sha3_512::default()
+    }
+
+    fn input(&mut self, input: &[u8]) {
+        digest::Digest::input(self, input)
+    }
+
+    fn result(&mut self, out: &mut [u8]) {
+        out.copy_from_slice(digest::Digest::result(*self).as_slice());
+    }
+
+    fn reset(&mut self) {
+        *self = sha3::Sha3_512::default();
+    }
+
+    fn output_bits(&self) -> usize { 512 }
+}
+
+impl Digest for sha3::Shake128 {
+    fn new() -> Self {
+        sha3::Shake128::default()
+    }
+
+    fn input(&mut self, input: &[u8]) {
+        self.process(input);
+    }
+
+    fn result(&mut self, out: &mut [u8]) {
+        self.xof_result().read(out);
+    }
+
+    fn reset(&mut self) {
+        *self = sha3::Shake128::default();
+    }
+
+    fn output_bits(&self) -> usize { 0 }
+}
+
+impl Digest for sha3::Shake256 {
+    fn new() -> Self {
+        sha3::Shake256::default()
+    }
+
+    fn input(&mut self, input: &[u8]) {
+        self.process(input);
+    }
+
+    fn result(&mut self, out: &mut [u8]) {
+        self.xof_result().read(out);
+    }
+
+    fn reset(&mut self) {
+        *self = sha3::Shake256::default();
+    }
+
+    fn output_bits(&self) -> usize { 0 }
 }
diff --git a/src/hashsum/hashsum.rs b/src/hashsum/hashsum.rs
index 8579a2ddb..d13f1dc02 100644
--- a/src/hashsum/hashsum.rs
+++ b/src/hashsum/hashsum.rs
@@ -11,11 +11,14 @@
  * file that was distributed with this source code.
  */
 
-extern crate crypto;
 extern crate getopts;
+extern crate md5;
 extern crate regex_syntax;
 extern crate regex;
 extern crate rustc_serialize as serialize;
+extern crate sha1;
+extern crate sha2;
+extern crate sha3;
 
 #[macro_use]
 extern crate uucore;
@@ -23,12 +26,12 @@ extern crate uucore;
 mod digest;
 
 use digest::Digest;
-use crypto::md5::Md5;
-use crypto::sha1::Sha1;
-use crypto::sha2::{Sha224, Sha256, Sha384, Sha512};
-use crypto::sha3::{Sha3, Sha3Mode};
+use md5::Context as Md5;
 use regex::Regex;
 use serialize::hex::ToHex;
+use sha1::Sha1;
+use sha2::{Sha224, Sha256, Sha384, Sha512};
+use sha3::{Sha3_224, Sha3_256, Sha3_384, Sha3_512, Shake128, Shake256};
 use std::ascii::AsciiExt;
 use std::fs::File;
 use std::io::{self, BufRead, BufReader, Read, stdin, Write};
@@ -64,24 +67,24 @@ fn detect_algo(program: &str, matches: &getopts::Matches) -> (&'static str, Box<
         "sha3sum" => {
             match matches.opt_str("bits") {
                 Some(bits_str) => match usize::from_str_radix(&bits_str, 10) {
-                    Ok(224) => ("SHA3-224", Box::new(Sha3::new(Sha3Mode::Sha3_224)) as Box<Digest>, 224),
-                    Ok(256) => ("SHA3-256", Box::new(Sha3::new(Sha3Mode::Sha3_256)) as Box<Digest>, 256),
-                    Ok(384) => ("SHA3-384", Box::new(Sha3::new(Sha3Mode::Sha3_384)) as Box<Digest>, 384),
-                    Ok(512) => ("SHA3-512", Box::new(Sha3::new(Sha3Mode::Sha3_512)) as Box<Digest>, 512),
+                    Ok(224) => ("SHA3-224", Box::new(Sha3_224::new()) as Box<Digest>, 224),
+                    Ok(256) => ("SHA3-256", Box::new(Sha3_256::new()) as Box<Digest>, 256),
+                    Ok(384) => ("SHA3-384", Box::new(Sha3_384::new()) as Box<Digest>, 384),
+                    Ok(512) => ("SHA3-512", Box::new(Sha3_512::new()) as Box<Digest>, 512),
                     Ok(_) => crash!(1, "Invalid output size for SHA3 (expected 224, 256, 384, or 512)"),
                     Err(err) => crash!(1, "{}", err)
                 },
                 None => crash!(1, "--bits required for SHA3")
             }
         }
-        "sha3-224sum" => ("SHA3-224", Box::new(Sha3::new(Sha3Mode::Sha3_224)) as Box<Digest>, 224),
-        "sha3-256sum" => ("SHA3-256", Box::new(Sha3::new(Sha3Mode::Sha3_256)) as Box<Digest>, 256),
-        "sha3-384sum" => ("SHA3-384", Box::new(Sha3::new(Sha3Mode::Sha3_384)) as Box<Digest>, 384),
-        "sha3-512sum" => ("SHA3-512", Box::new(Sha3::new(Sha3Mode::Sha3_512)) as Box<Digest>, 512),
+        "sha3-224sum" => ("SHA3-224", Box::new(Sha3_224::new()) as Box<Digest>, 224),
+        "sha3-256sum" => ("SHA3-256", Box::new(Sha3_256::new()) as Box<Digest>, 256),
+        "sha3-384sum" => ("SHA3-384", Box::new(Sha3_384::new()) as Box<Digest>, 384),
+        "sha3-512sum" => ("SHA3-512", Box::new(Sha3_512::new()) as Box<Digest>, 512),
         "shake128sum" => {
             match matches.opt_str("bits") {
                 Some(bits_str) => match usize::from_str_radix(&bits_str, 10) {
-                    Ok(bits) => ("SHAKE128", Box::new(Sha3::new(Sha3Mode::Shake128)) as Box<Digest>, bits),
+                    Ok(bits) => ("SHAKE128", Box::new(Shake128::new()) as Box<Digest>, bits),
                     Err(err) => crash!(1, "{}", err)
                 },
                 None => crash!(1, "--bits required for SHAKE-128")
@@ -90,7 +93,7 @@ fn detect_algo(program: &str, matches: &getopts::Matches) -> (&'static str, Box<
         "shake256sum" => {
             match matches.opt_str("bits") {
                 Some(bits_str) => match usize::from_str_radix(&bits_str, 10) {
-                    Ok(bits) => ("SHAKE256", Box::new(Sha3::new(Sha3Mode::Shake256)) as Box<Digest>, bits),
+                    Ok(bits) => ("SHAKE256", Box::new(Shake256::new()) as Box<Digest>, bits),
                     Err(err) => crash!(1, "{}", err)
                 },
                 None => crash!(1, "--bits required for SHAKE-256")
@@ -113,24 +116,24 @@ fn detect_algo(program: &str, matches: &getopts::Matches) -> (&'static str, Box<
                 if matches.opt_present("sha3") {
                     match matches.opt_str("bits") {
                         Some(bits_str) => match usize::from_str_radix(&bits_str, 10) {
-                            Ok(224) => set_or_crash("SHA3-224", Box::new(Sha3::new(Sha3Mode::Sha3_224)) as Box<Digest>, 224),
-                            Ok(256) => set_or_crash("SHA3-256", Box::new(Sha3::new(Sha3Mode::Sha3_256)) as Box<Digest>, 256),
-                            Ok(384) => set_or_crash("SHA3-384", Box::new(Sha3::new(Sha3Mode::Sha3_384)) as Box<Digest>, 384),
-                            Ok(512) => set_or_crash("SHA3-512", Box::new(Sha3::new(Sha3Mode::Sha3_512)) as Box<Digest>, 512),
+                            Ok(224) => set_or_crash("SHA3-224", Box::new(Sha3_224::new()) as Box<Digest>, 224),
+                            Ok(256) => set_or_crash("SHA3-256", Box::new(Sha3_256::new()) as Box<Digest>, 256),
+                            Ok(384) => set_or_crash("SHA3-384", Box::new(Sha3_384::new()) as Box<Digest>, 384),
+                            Ok(512) => set_or_crash("SHA3-512", Box::new(Sha3_512::new()) as Box<Digest>, 512),
                             Ok(_) => crash!(1, "Invalid output size for SHA3 (expected 224, 256, 384, or 512)"),
                             Err(err) => crash!(1, "{}", err)
                         },
                         None => crash!(1, "--bits required for SHA3")
                     }
                 }
-                if matches.opt_present("sha3-224") { set_or_crash("SHA3-224", Box::new(Sha3::new(Sha3Mode::Sha3_224)), 224) }
-                if matches.opt_present("sha3-256") { set_or_crash("SHA3-256", Box::new(Sha3::new(Sha3Mode::Sha3_256)), 256) }
-                if matches.opt_present("sha3-384") { set_or_crash("SHA3-384", Box::new(Sha3::new(Sha3Mode::Sha3_384)), 384) }
-                if matches.opt_present("sha3-512") { set_or_crash("SHA3-512", Box::new(Sha3::new(Sha3Mode::Sha3_512)), 512) }
+                if matches.opt_present("sha3-224") { set_or_crash("SHA3-224", Box::new(Sha3_224::new()), 224) }
+                if matches.opt_present("sha3-256") { set_or_crash("SHA3-256", Box::new(Sha3_256::new()), 256) }
+                if matches.opt_present("sha3-384") { set_or_crash("SHA3-384", Box::new(Sha3_384::new()), 384) }
+                if matches.opt_present("sha3-512") { set_or_crash("SHA3-512", Box::new(Sha3_512::new()), 512) }
                 if matches.opt_present("shake128") {
                     match matches.opt_str("bits") {
                         Some(bits_str) => match usize::from_str_radix(&bits_str, 10) {
-                            Ok(bits) => set_or_crash("SHAKE128", Box::new(Sha3::new(Sha3Mode::Shake128)), bits),
+                            Ok(bits) => set_or_crash("SHAKE128", Box::new(Shake128::new()), bits),
                             Err(err) => crash!(1, "{}", err)
                         },
                         None => crash!(1, "--bits required for SHAKE-128")
@@ -139,7 +142,7 @@ fn detect_algo(program: &str, matches: &getopts::Matches) -> (&'static str, Box<
                 if matches.opt_present("shake256") {
                     match matches.opt_str("bits") {
                         Some(bits_str) => match usize::from_str_radix(&bits_str, 10) {
-                            Ok(bits) => set_or_crash("SHAKE256", Box::new(Sha3::new(Sha3Mode::Shake256)), bits),
+                            Ok(bits) => set_or_crash("SHAKE256", Box::new(Shake256::new()), bits),
                             Err(err) => crash!(1, "{}", err)
                         },
                         None => crash!(1, "--bits required for SHAKE-256")