phc-scrypt

🔒 Node.JS scrypt password hashing algorithm following the PHC string format.
_{Coded with ❤️ by Simone Primarosa.}

PHC String Format

The PHC String Format is an attempt to specify a common hash string format that’s a restricted & well defined subset of the Modular Crypt Format. New hashes are strongly encouraged to adhere to the PHC specification, rather than the much looser Modular Crypt Format.

The hash strings generated by this package are in the following format:

$scrypt$ln=<cost>,r=<blocksize>,p=<parallelism>$<salt>$<hash>

Where:

Field	Type	Description
`<cost>`	`number`	The CPU/Memory cost parameter N encoded as log2(N).
`<blocksize>`	`number`	The block size parameter r.
`<parallelism>`	`number`	The parallelization parameter p.
`<salt>`	`string`	A sequence of bits, known as a cryptographic salt encoded in B64.
`<hash>`	`string`	The computed derived key by the scrypt algorithm encoded in B64.

For more details consult the scrypt paper here.

Install

npm install --save @phc/scrypt

Usage

const scrypt = require('@phc/scrypt');

// Hash and verify with scrypt and default configs
const hash = await scrypt.hash('password');
// => $scrypt$ln=15,r=8,p=1$D/EEcdfcBkj4DQB3zlfsFQ$v9Xsag5AySIY78DFKslBzeRXCUfsLKCZ0Xm4Xwoh+J0

const match = await scrypt.verify(hash, 'password');
// => true

const match = await scrypt.verify(hash, 'wrong');
// => false

const ids = scrypt.identifiers();
// => ['scrypt']

Benchmarks

Below you can find usage statistics of this hashing algorithm with different options.
This should help you understand how the different options affects the running time and memory usage of the algorithm.

Usage reports are generated thanks to sympact.

System Report ↴

Distro    Release  Platform  Arch
--------  -------  --------  ----
Mac OS X  10.12.6  darwin    x64

CPU     Brand           Clock     Cores
------  --------------  --------  -----
Intel®  Core™ i5-6360U  2.00 GHz  4    

Memory                  Type    Size         Clock   
----------------------  ------  -----------  --------
Micron Technology Inc.  LPDDR3  4294.967 MB  1867 MHz
Micron Technology Inc.  LPDDR3  4294.967 MB  1867 MHz

Default options - {cost:15, blocksize:8, parallelism:1} ↴

CPU Usage (avarage ± σ)  CPU Usage Range (min … max)
-----------------------  ---------------------------
8.30 % ± 3.80 %          0.70 % … 10.20 %           

RAM Usage (avarage ± σ)  RAM Usage Range (min … max)
-----------------------  ---------------------------
39.765 MB ± 15.420 MB    21.058 MB … 56.001 MB      

Execution time  Sampling time  Samples  
--------------  -------------  ---------
0.120 s         0.163 s        5 samples

Instant  CPU Usage  RAM Usage  PIDS
-------  ---------  ---------  -----
0.024 s  0.70 %     21.058 MB  23332
0.074 s  10.20 %    43.299 MB  23332
0.104 s  10.20 %    56.001 MB  23332
0.135 s  10.20 %    56.001 MB  23332
0.163 s  10.20 %    22.467 MB  23332

Cost of 10 - {cost:10, blocksize:8, parallelism:1} ↴

CPU Usage (avarage ± σ)  CPU Usage Range (min … max)
-----------------------  ---------------------------
0.60 % ± 0.00 %          0.60 % … 0.60 %            

RAM Usage (avarage ± σ)  RAM Usage Range (min … max)
-----------------------  ---------------------------
21.713 MB ± 0.602 MB     21.111 MB … 22.315 MB      

Execution time  Sampling time  Samples  
--------------  -------------  ---------
0.015 s         0.061 s        2 samples

Instant  CPU Usage  RAM Usage  PIDS
-------  ---------  ---------  -----
0.025 s  0.60 %     21.111 MB  23349
0.061 s  0.60 %     22.315 MB  23349

Cost of 14 - {cost:14, blocksize:8, parallelism:1} ↴

CPU Usage (avarage ± σ)  CPU Usage Range (min … max)
-----------------------  ---------------------------
1.00 % ± 0.00 %          1.00 % … 1.00 %            

RAM Usage (avarage ± σ)  RAM Usage Range (min … max)
-----------------------  ---------------------------
26.058 MB ± 7.145 MB     21.131 MB … 38.404 MB      

Execution time  Sampling time  Samples  
--------------  -------------  ---------
0.070 s         0.118 s        4 samples

Instant  CPU Usage  RAM Usage  PIDS
-------  ---------  ---------  -----
0.024 s  1.00 %     21.131 MB  23360
0.069 s  1.00 %     38.404 MB  23360
0.103 s  1.00 %     22.348 MB  23360
0.118 s  1.00 %     22.348 MB  23360

Cost of 16 - {cost:16, blocksize:8, parallelism:1} ↴

CPU Usage (avarage ± σ)  CPU Usage Range (min … max)
-----------------------  ---------------------------
27.03 % ± 18.50 %        0.60 % … 45.30 %           

RAM Usage (avarage ± σ)  RAM Usage Range (min … max)
-----------------------  ---------------------------
59.287 MB ± 29.023 MB    20.759 MB … 89.092 MB      

Execution time  Sampling time  Samples   
--------------  -------------  ----------
0.248 s         0.293 s        10 samples

Instant  CPU Usage  RAM Usage  PIDS
-------  ---------  ---------  -----
0.024 s  0.60 %     20.759 MB  23375
0.069 s  10.80 %    39.600 MB  23375
0.100 s  10.80 %    57.696 MB  23375
0.131 s  10.80 %    74.301 MB  23375
0.163 s  10.80 %    89.092 MB  23375
0.194 s  45.30 %    89.092 MB  23375
0.231 s  45.30 %    89.092 MB  23375
0.260 s  45.30 %    89.092 MB  23375
0.291 s  45.30 %    22.073 MB  23375
0.293 s  45.30 %    22.073 MB  23375

Cost of 18 - {cost:18, blocksize:8, parallelism:1} ↴

CPU Usage (avarage ± σ)  CPU Usage Range (min … max)
-----------------------  ---------------------------
68.16 % ± 28.64 %        0.70 % … 93.90 %           

RAM Usage (avarage ± σ)  RAM Usage Range (min … max)
-----------------------  ---------------------------
208.153 MB ± 96.535 MB   21.144 MB … 290.943 MB     

Execution time  Sampling time  Samples   
--------------  -------------  ----------
0.977 s         1.021 s        34 samples

Instant  CPU Usage  RAM Usage   PIDS
-------  ---------  ----------  -----
0.023 s  0.70 %     21.144 MB   23402
0.071 s  0.70 %     42.115 MB   23402
0.101 s  0.70 %     59.486 MB   23402
0.131 s  31.30 %    76.911 MB   23402
0.162 s  31.30 %    94.630 MB   23402
0.192 s  31.30 %    112.493 MB  23402
0.230 s  31.30 %    133.943 MB  23402
0.262 s  56.80 %    147.997 MB  23402
0.286 s  56.80 %    160.592 MB  23402
0.315 s  56.80 %    177.013 MB  23402
0.346 s  56.80 %    194.724 MB  23402
0.382 s  72.00 %    210.108 MB  23402
0.408 s  72.00 %    222.282 MB  23402
0.431 s  72.00 %    235.143 MB  23402
0.464 s  72.00 %    252.690 MB  23402
0.496 s  72.00 %    269.238 MB  23402
0.529 s  82.00 %    283.013 MB  23402
0.552 s  82.00 %    290.943 MB  23402
0.582 s  82.00 %    290.943 MB  23402
0.615 s  82.00 %    290.943 MB  23402
0.646 s  87.30 %    290.943 MB  23402
0.679 s  87.30 %    290.943 MB  23402
0.707 s  87.30 %    290.943 MB  23402
0.740 s  87.30 %    290.943 MB  23402
0.771 s  91.00 %    290.943 MB  23402
0.796 s  91.00 %    290.943 MB  23402
0.827 s  91.00 %    290.943 MB  23402
0.859 s  91.00 %    290.943 MB  23402
0.896 s  93.50 %    290.943 MB  23402
0.919 s  93.50 %    290.943 MB  23402
0.950 s  93.50 %    290.943 MB  23402
0.983 s  93.50 %    265.421 MB  23402
1.012 s  93.90 %    22.528 MB   23402
1.021 s  93.90 %    22.528 MB   23402

Cost of 20 - {cost:20, blocksize:8, parallelism:1} ↴

CPU Usage (avarage ± σ)  CPU Usage Range (min … max)
-----------------------  ---------------------------
91.21 % ± 19.32 %        0.90 % … 100.00 %          

RAM Usage (avarage ± σ)  RAM Usage Range (min … max)
-----------------------  ---------------------------
804.252 MB ± 357.670 MB  20.914 MB … 1095.913 MB    

Execution time  Sampling time  Samples    
--------------  -------------  -----------
3.991 s         4.032 s        132 samples

Instant  CPU Usage  RAM Usage    PIDS
-------  ---------  -----------  -----
0.023 s  0.90 %     20.914 MB    23477
0.073 s  13.70 %    43.454 MB    23477
0.103 s  13.70 %    61.125 MB    23477
0.135 s  13.70 %    79.528 MB    23477
0.166 s  13.70 %    97.137 MB    23477
0.195 s  46.60 %    113.861 MB   23477
0.228 s  46.60 %    132.624 MB   23477
0.257 s  46.60 %    148.546 MB   23477
0.288 s  46.60 %    166.314 MB   23477
0.319 s  65.90 %    183.742 MB   23477
0.350 s  65.90 %    201.548 MB   23477
0.385 s  65.90 %    218.853 MB   23477
0.410 s  65.90 %    233.521 MB   23477
0.445 s  78.10 %    252.256 MB   23477
0.478 s  78.10 %    268.091 MB   23477
0.508 s  78.10 %    283.501 MB   23477
0.532 s  78.10 %    296.665 MB   23477
0.563 s  78.10 %    314.053 MB   23477
0.601 s  86.60 %    332.669 MB   23477
0.630 s  86.60 %    345.465 MB   23477
0.649 s  86.60 %    356.663 MB   23477
0.679 s  86.60 %    373.604 MB   23477
0.706 s  92.20 %    389.239 MB   23477
0.735 s  92.20 %    406.569 MB   23477
0.766 s  92.20 %    424.444 MB   23477
0.796 s  92.20 %    442.057 MB   23477
0.826 s  92.20 %    459.317 MB   23477
0.858 s  95.00 %    477.434 MB   23477
0.886 s  95.00 %    493.470 MB   23477
0.915 s  95.00 %    509.420 MB   23477
0.945 s  95.00 %    526.828 MB   23477
0.976 s  98.00 %    544.375 MB   23477
1.006 s  98.00 %    561.500 MB   23477
1.036 s  98.00 %    579.178 MB   23477
1.068 s  98.00 %    597.348 MB   23477
1.099 s  99.20 %    614.593 MB   23477
1.127 s  99.20 %    630.661 MB   23477
1.165 s  99.20 %    648.651 MB   23477
1.195 s  99.20 %    663.556 MB   23477
1.223 s  98.70 %    677.904 MB   23477
1.250 s  98.70 %    692.257 MB   23477
1.279 s  98.70 %    708.661 MB   23477
1.314 s  98.70 %    724.242 MB   23477
1.346 s  98.80 %    739.234 MB   23477
1.374 s  98.80 %    753.725 MB   23477
1.401 s  98.80 %    769.225 MB   23477
1.433 s  98.80 %    786.985 MB   23477
1.462 s  98.80 %    804.168 MB   23477
1.491 s  99.40 %    820.855 MB   23477
1.522 s  99.40 %    838.889 MB   23477
1.552 s  99.40 %    856.109 MB   23477
1.593 s  98.90 %    875.192 MB   23477
1.612 s  98.90 %    885.109 MB   23477
1.641 s  98.90 %    901.906 MB   23477
1.673 s  98.90 %    920.179 MB   23477
1.706 s  98.90 %    936.202 MB   23477
1.736 s  99.70 %    950.313 MB   23477
1.762 s  99.70 %    964.940 MB   23477
1.793 s  99.70 %    982.942 MB   23477
1.823 s  99.70 %    1000.940 MB  23477
1.857 s  99.10 %    1018.970 MB  23477
1.884 s  99.10 %    1034.842 MB  23477
1.915 s  99.10 %    1051.058 MB  23477
1.948 s  99.10 %    1069.253 MB  23477
2.010 s  99.30 %    1092.149 MB  23477
2.037 s  99.30 %    1095.913 MB  23477
2.069 s  99.30 %    1095.913 MB  23477
2.097 s  97.20 %    1095.913 MB  23477
2.110 s  97.20 %    1095.913 MB  23477
2.143 s  97.20 %    1095.913 MB  23477
2.173 s  97.20 %    1095.913 MB  23477
2.210 s  97.20 %    1095.913 MB  23477
2.241 s  99.30 %    1095.913 MB  23477
2.269 s  99.30 %    1095.913 MB  23477
2.301 s  99.30 %    1095.913 MB  23477
2.333 s  99.30 %    1095.913 MB  23477
2.367 s  98.70 %    1095.913 MB  23477
2.395 s  98.70 %    1095.913 MB  23477
2.421 s  98.70 %    1095.913 MB  23477
2.451 s  98.70 %    1095.913 MB  23477
2.488 s  98.90 %    1095.913 MB  23477
2.518 s  98.90 %    1095.913 MB  23477
2.544 s  98.90 %    1095.913 MB  23477
2.573 s  98.90 %    1095.913 MB  23477
2.602 s  98.70 %    1095.913 MB  23477
2.642 s  98.70 %    1095.913 MB  23477
2.663 s  98.70 %    1095.913 MB  23477
2.693 s  98.70 %    1095.913 MB  23477
2.725 s  98.20 %    1095.913 MB  23477
2.759 s  98.20 %    1095.913 MB  23477
2.791 s  98.20 %    1095.913 MB  23477
2.818 s  98.20 %    1095.913 MB  23477
2.850 s  97.60 %    1095.913 MB  23477
2.881 s  97.60 %    1095.913 MB  23477
2.914 s  97.60 %    1095.913 MB  23477
2.944 s  97.60 %    1095.913 MB  23477
2.972 s  97.60 %    1095.913 MB  23477
3.002 s  97.10 %    1095.913 MB  23477
3.035 s  97.10 %    1095.913 MB  23477
3.069 s  97.10 %    1095.913 MB  23477
3.095 s  97.10 %    1095.913 MB  23477
3.128 s  100.00 %   1095.913 MB  23477
3.155 s  100.00 %   1095.913 MB  23477
3.186 s  100.00 %   1095.913 MB  23477
3.216 s  100.00 %   1095.913 MB  23477
3.246 s  98.70 %    1095.913 MB  23477
3.275 s  98.70 %    1095.913 MB  23477
3.306 s  98.70 %    1095.913 MB  23477
3.338 s  98.70 %    1095.913 MB  23477
3.374 s  98.90 %    1095.913 MB  23477
3.407 s  98.90 %    1095.913 MB  23477
3.430 s  98.90 %    1095.913 MB  23477
3.462 s  98.90 %    1095.913 MB  23477
3.492 s  98.10 %    1095.913 MB  23477
3.526 s  98.10 %    1095.913 MB  23477
3.555 s  98.10 %    1095.913 MB  23477
3.581 s  98.10 %    1095.913 MB  23477
3.612 s  99.00 %    1095.913 MB  23477
3.645 s  99.00 %    1095.913 MB  23477
3.678 s  99.00 %    1095.913 MB  23477
3.714 s  99.00 %    1095.913 MB  23477
3.739 s  97.90 %    1095.913 MB  23477
3.770 s  97.90 %    1095.913 MB  23477
3.809 s  97.90 %    1095.913 MB  23477
3.835 s  97.90 %    1095.913 MB  23477
3.861 s  97.80 %    1095.913 MB  23477
3.890 s  97.80 %    1095.913 MB  23477
3.937 s  97.80 %    927.875 MB   23477
3.967 s  97.80 %    559.043 MB   23477
3.985 s  97.90 %    334.381 MB   23477
4.015 s  97.90 %    22.172 MB    23477
4.032 s  97.90 %    22.192 MB    23477

Blocksize of 9 - {cost:15, blocksize:9, parallelism:1} ↴

CPU Usage (avarage ± σ)  CPU Usage Range (min … max)
-----------------------  ---------------------------
14.20 % ± 9.62 %         0.60 % … 21.00 %           

RAM Usage (avarage ± σ)  RAM Usage Range (min … max)
-----------------------  ---------------------------
37.687 MB ± 17.146 MB    20.775 MB … 59.740 MB      

Execution time  Sampling time  Samples  
--------------  -------------  ---------
0.137 s         0.183 s        6 samples

Instant  CPU Usage  RAM Usage  PIDS
-------  ---------  ---------  -----
0.024 s  0.60 %     20.775 MB  23748
0.072 s  0.60 %     41.751 MB  23748
0.104 s  21.00 %    59.740 MB  23748
0.136 s  21.00 %    59.740 MB  23748
0.169 s  21.00 %    22.057 MB  23748
0.183 s  21.00 %    22.057 MB  23748

Blocksize of 10 - {cost:15, blocksize:10, parallelism:1} ↴

CPU Usage (avarage ± σ)  CPU Usage Range (min … max)
-----------------------  ---------------------------
16.46 % ± 16.87 %        0.60 % … 42.90 %           

RAM Usage (avarage ± σ)  RAM Usage Range (min … max)
-----------------------  ---------------------------
41.805 MB ± 18.883 MB    20.660 MB … 64.053 MB      

Execution time  Sampling time  Samples  
--------------  -------------  ---------
0.149 s         0.2 s          7 samples

Instant  CPU Usage  RAM Usage  PIDS
-------  ---------  ---------  -----
0.024 s  0.60 %     20.660 MB  23767
0.072 s  7.20 %     40.935 MB  23767
0.103 s  7.20 %     58.663 MB  23767
0.133 s  7.20 %     64.053 MB  23767
0.164 s  7.20 %     64.053 MB  23767
0.198 s  42.90 %    22.135 MB  23767
0.200 s  42.90 %    22.135 MB  23767

Blocksize of 11 - {cost:15, blocksize:11, parallelism:1} ↴

CPU Usage (avarage ± σ)  CPU Usage Range (min … max)
-----------------------  ---------------------------
18.80 % ± 15.24 %        1.20 % … 32.00 %           

RAM Usage (avarage ± σ)  RAM Usage Range (min … max)
-----------------------  ---------------------------
43.562 MB ± 20.569 MB    20.746 MB … 68.104 MB      

Execution time  Sampling time  Samples  
--------------  -------------  ---------
0.160 s         0.206 s        7 samples

Instant  CPU Usage  RAM Usage  PIDS
-------  ---------  ---------  -----
0.023 s  1.20 %     20.746 MB  23788
0.072 s  1.20 %     42.975 MB  23788
0.103 s  1.20 %     61.026 MB  23788
0.134 s  32.00 %    68.104 MB  23788
0.164 s  32.00 %    68.104 MB  23788
0.198 s  32.00 %    21.987 MB  23788
0.206 s  32.00 %    21.987 MB  23788

Blocksize of 12 - {cost:15, blocksize:12, parallelism:1} ↴

CPU Usage (avarage ± σ)  CPU Usage Range (min … max)
-----------------------  ---------------------------
22.75 % ± 16.29 %        0.60 % … 46.60 %           

RAM Usage (avarage ± σ)  RAM Usage Range (min … max)
-----------------------  ---------------------------
47.866 MB ± 22.444 MB    21.070 MB … 72.593 MB      

Execution time  Sampling time  Samples  
--------------  -------------  ---------
0.180 s         0.234 s        8 samples

Instant  CPU Usage  RAM Usage  PIDS
-------  ---------  ---------  -----
0.025 s  0.60 %     21.070 MB  23809
0.072 s  0.60 %     40.772 MB  23809
0.103 s  21.90 %    58.741 MB  23809
0.135 s  21.90 %    72.593 MB  23809
0.164 s  21.90 %    72.593 MB  23809
0.195 s  21.90 %    72.593 MB  23809
0.232 s  46.60 %    22.282 MB  23809
0.234 s  46.60 %    22.282 MB  23809

Test vectors

The scrypt paper lists four test vectors to test implementation.
This package implements them here.

API

hash(password, [options]) ⇒ Promise.<string>: Computes the hash string of the given password in the PHC format using scrypt package.
verify(phcstr, password) ⇒ Promise.<boolean>: Determines whether or not the hash stored inside the PHC formatted string matches the hash generated for the password provided.
identifiers() ⇒ Array.<string>: Gets the list of all identifiers supported by this hashing function.

hash(password, [options]) ⇒ `Promise.<string>`

Computes the hash string of the given password in the PHC format using scrypt package.

Kind: global function
Returns: Promise.<string> - The generated secure hash string in the PHC format.
Access: public

Param	Type	Default	Description
password	`string`		The password to hash.
[options]	`Object`		Optional configurations related to the hashing function.
[options.blocksize]	`number`	`8`	Optional amount of memory to use in kibibytes. Must be an integer within the range (`8` <= `memory` <= `2^32-1`).
[options.cost]	`number`	`15`	Optional CPU/memory cost parameter. Must be an integer power of 2 within the range (`2` <= `cost` <= `2^((128 * blocksize) / 8) - 1`).
[options.parallelism]	`number`	`1`	Optional degree of parallelism to use. Must be an integer within the range (`1` <= `parallelism` <= `((2^32-1) * 32) / (128 * blocksize)`).

verify(phcstr, password) ⇒ `Promise.<boolean>`

Determines whether or not the hash stored inside the PHC formatted string matches the hash generated for the password provided.

Kind: global function
Returns: Promise.<boolean> - A boolean that is true if the hash computed for the password matches.
Access: public

Param	Type	Description
phcstr	`string`	Secure hash string generated from this package.
password	`string`	User's password input.

identifiers() ⇒ `Array.<string>`

Gets the list of all identifiers supported by this hashing function.

Kind: global function
Returns: Array.<string> - A list of identifiers supported by this hashing function.
Access: public

Contributing

Contributions are REALLY welcome and if you find a security flaw in this code, PLEASE report it.

Authors

Simone Primarosa - Github (@simonepri) • Twitter (@simoneprimarosa)

See also the list of contributors who participated in this project.

License

This project is licensed under the MIT License - see the license file for details.

Name		Name	Last commit message	Last commit date
Latest commit History 33 Commits
test		test
.appveyor.yml		.appveyor.yml
.codecov.yml		.codecov.yml
.editorconfig		.editorconfig
.gitattributes		.gitattributes
.gitignore		.gitignore
.npmrc		.npmrc
.travis.yml		.travis.yml
bench.js		bench.js
index.js		index.js
license		license
package.json		package.json
readme.md		readme.md

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phc-scrypt

PHC String Format

Install

Usage

Benchmarks

Test vectors

API

TOC

hash(password, [options]) ⇒ `Promise.<string>`

verify(phcstr, password) ⇒ `Promise.<boolean>`

identifiers() ⇒ `Array.<string>`

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phc-scrypt

PHC String Format

Install

Usage

Benchmarks

Test vectors

API

TOC

hash(password, [options]) ⇒ Promise.<string>

verify(phcstr, password) ⇒ Promise.<boolean>

identifiers() ⇒ Array.<string>

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Contributing

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hash(password, [options]) ⇒ `Promise.<string>`

verify(phcstr, password) ⇒ `Promise.<boolean>`

identifiers() ⇒ `Array.<string>`

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