Press n or j to go to the next uncovered block, b, p or k for the previous block.
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const {
FunctionPrototypeCall,
ObjectSetPrototypeOf,
ReflectApply,
} = primordials;
const {
codes: {
ERR_CRYPTO_SIGN_KEY_REQUIRED,
ERR_INVALID_ARG_TYPE,
ERR_INVALID_ARG_VALUE,
}
} = require('internal/errors');
const {
validateFunction,
validateEncoding,
validateString,
} = require('internal/validators');
const {
Sign: _Sign,
SignJob,
Verify: _Verify,
kCryptoJobAsync,
kCryptoJobSync,
kSigEncDER,
kSigEncP1363,
kSignJobModeSign,
kSignJobModeVerify,
} = internalBinding('crypto');
const {
getArrayBufferOrView,
getDefaultEncoding,
kHandle,
} = require('internal/crypto/util');
const {
preparePrivateKey,
preparePublicOrPrivateKey,
} = require('internal/crypto/keys');
const { Writable } = require('stream');
const { Buffer } = require('buffer');
const {
isArrayBufferView,
} = require('internal/util/types');
function Sign(algorithm, options) {
if (!(this instanceof Sign))
return new Sign(algorithm, options);
validateString(algorithm, 'algorithm');
this[kHandle] = new _Sign();
this[kHandle].init(algorithm);
ReflectApply(Writable, this, [options]);
}
ObjectSetPrototypeOf(Sign.prototype, Writable.prototype);
ObjectSetPrototypeOf(Sign, Writable);
Sign.prototype._write = function _write(chunk, encoding, callback) {
this.update(chunk, encoding);
callback();
};
Sign.prototype.update = function update(data, encoding) {
encoding = encoding || getDefaultEncoding();
if (typeof data === 'string') {
validateEncoding(data, encoding);
} else if (!isArrayBufferView(data)) {
throw new ERR_INVALID_ARG_TYPE(
'data', ['string', 'Buffer', 'TypedArray', 'DataView'], data);
}
this[kHandle].update(data, encoding);
return this;
};
function getPadding(options) {
return getIntOption('padding', options);
}
function getSaltLength(options) {
return getIntOption('saltLength', options);
}
function getDSASignatureEncoding(options) {
if (typeof options === 'object') {
const { dsaEncoding = 'der' } = options;
if (dsaEncoding === 'der')
return kSigEncDER;
else if (dsaEncoding === 'ieee-p1363')
return kSigEncP1363;
throw new ERR_INVALID_ARG_VALUE('options.dsaEncoding', dsaEncoding);
}
return kSigEncDER;
}
function getIntOption(name, options) {
const value = options[name];
if (value !== undefined) {
if (value === value >> 0) {
return value;
}
throw new ERR_INVALID_ARG_VALUE(`options.${name}`, value);
}
return undefined;
}
Sign.prototype.sign = function sign(options, encoding) {
if (!options)
throw new ERR_CRYPTO_SIGN_KEY_REQUIRED();
const { data, format, type, passphrase } = preparePrivateKey(options, true);
// Options specific to RSA
const rsaPadding = getPadding(options);
const pssSaltLength = getSaltLength(options);
// Options specific to (EC)DSA
const dsaSigEnc = getDSASignatureEncoding(options);
const ret = this[kHandle].sign(data, format, type, passphrase, rsaPadding,
pssSaltLength, dsaSigEnc);
encoding = encoding || getDefaultEncoding();
if (encoding && encoding !== 'buffer')
return ret.toString(encoding);
return ret;
};
function signOneShot(algorithm, data, key, callback) {
if (algorithm != null)
validateString(algorithm, 'algorithm');
if (callback !== undefined)
validateFunction(callback, 'callback');
data = getArrayBufferOrView(data, 'data');
if (!key)
throw new ERR_CRYPTO_SIGN_KEY_REQUIRED();
// Options specific to RSA
const rsaPadding = getPadding(key);
const pssSaltLength = getSaltLength(key);
// Options specific to (EC)DSA
const dsaSigEnc = getDSASignatureEncoding(key);
const {
data: keyData,
format: keyFormat,
type: keyType,
passphrase: keyPassphrase
} = preparePrivateKey(key);
const job = new SignJob(
callback ? kCryptoJobAsync : kCryptoJobSync,
kSignJobModeSign,
keyData,
keyFormat,
keyType,
keyPassphrase,
data,
algorithm,
pssSaltLength,
rsaPadding,
dsaSigEnc);
if (!callback) {
const { 0: err, 1: signature } = job.run();
if (err !== undefined)
throw err;
return Buffer.from(signature);
}
job.ondone = (error, signature) => {
if (error) return FunctionPrototypeCall(callback, job, error);
FunctionPrototypeCall(callback, job, null, Buffer.from(signature));
};
job.run();
}
function Verify(algorithm, options) {
if (!(this instanceof Verify))
return new Verify(algorithm, options);
validateString(algorithm, 'algorithm');
this[kHandle] = new _Verify();
this[kHandle].init(algorithm);
ReflectApply(Writable, this, [options]);
}
ObjectSetPrototypeOf(Verify.prototype, Writable.prototype);
ObjectSetPrototypeOf(Verify, Writable);
Verify.prototype._write = Sign.prototype._write;
Verify.prototype.update = Sign.prototype.update;
Verify.prototype.verify = function verify(options, signature, sigEncoding) {
const {
data,
format,
type,
passphrase
} = preparePublicOrPrivateKey(options, true);
sigEncoding = sigEncoding || getDefaultEncoding();
// Options specific to RSA
const rsaPadding = getPadding(options);
const pssSaltLength = getSaltLength(options);
// Options specific to (EC)DSA
const dsaSigEnc = getDSASignatureEncoding(options);
signature = getArrayBufferOrView(signature, 'signature', sigEncoding);
return this[kHandle].verify(data, format, type, passphrase, signature,
rsaPadding, pssSaltLength, dsaSigEnc);
};
function verifyOneShot(algorithm, data, key, signature, callback) {
if (algorithm != null)
validateString(algorithm, 'algorithm');
if (callback !== undefined)
validateFunction(callback, 'callback');
data = getArrayBufferOrView(data, 'data');
if (!isArrayBufferView(data)) {
throw new ERR_INVALID_ARG_TYPE(
'data',
['Buffer', 'TypedArray', 'DataView'],
data
);
}
// Options specific to RSA
const rsaPadding = getPadding(key);
const pssSaltLength = getSaltLength(key);
// Options specific to (EC)DSA
const dsaSigEnc = getDSASignatureEncoding(key);
if (!isArrayBufferView(signature)) {
throw new ERR_INVALID_ARG_TYPE(
'signature',
['Buffer', 'TypedArray', 'DataView'],
signature
);
}
const {
data: keyData,
format: keyFormat,
type: keyType,
passphrase: keyPassphrase
} = preparePublicOrPrivateKey(key);
const job = new SignJob(
callback ? kCryptoJobAsync : kCryptoJobSync,
kSignJobModeVerify,
keyData,
keyFormat,
keyType,
keyPassphrase,
data,
algorithm,
pssSaltLength,
rsaPadding,
dsaSigEnc,
signature);
if (!callback) {
const { 0: err, 1: result } = job.run();
if (err !== undefined)
throw err;
return result;
}
job.ondone = (error, result) => {
if (error) return FunctionPrototypeCall(callback, job, error);
FunctionPrototypeCall(callback, job, null, result);
};
job.run();
}
module.exports = {
Sign,
signOneShot,
Verify,
verifyOneShot,
};
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