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1
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var DES = require('browserify-des')
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2
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var aes = require('browserify-aes/browser')
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3
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var aesModes = require('browserify-aes/modes')
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4
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var desModes = require('browserify-des/modes')
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5
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var ebtk = require('evp_bytestokey')
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6
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7
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function createCipher (suite, password) {
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8
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suite = suite.toLowerCase()
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9
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10
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var keyLen, ivLen
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11
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if (aesModes[suite]) {
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12
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keyLen = aesModes[suite].key
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13
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ivLen = aesModes[suite].iv
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14
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} else if (desModes[suite]) {
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15
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keyLen = desModes[suite].key * 8
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16
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ivLen = desModes[suite].iv
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17
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} else {
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18
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throw new TypeError('invalid suite type')
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19
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}
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20
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21
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var keys = ebtk(password, false, keyLen, ivLen)
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22
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return createCipheriv(suite, keys.key, keys.iv)
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23
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}
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24
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25
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function createDecipher (suite, password) {
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26
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suite = suite.toLowerCase()
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27
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28
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var keyLen, ivLen
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29
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if (aesModes[suite]) {
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30
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keyLen = aesModes[suite].key
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31
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ivLen = aesModes[suite].iv
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32
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} else if (desModes[suite]) {
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33
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keyLen = desModes[suite].key * 8
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34
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ivLen = desModes[suite].iv
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35
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} else {
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36
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throw new TypeError('invalid suite type')
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37
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}
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38
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39
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var keys = ebtk(password, false, keyLen, ivLen)
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40
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return createDecipheriv(suite, keys.key, keys.iv)
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41
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}
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42
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43
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function createCipheriv (suite, key, iv) {
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44
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suite = suite.toLowerCase()
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45
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if (aesModes[suite]) return aes.createCipheriv(suite, key, iv)
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46
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if (desModes[suite]) return new DES({ key: key, iv: iv, mode: suite })
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47
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48
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throw new TypeError('invalid suite type')
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49
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}
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50
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51
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function createDecipheriv (suite, key, iv) {
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52
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suite = suite.toLowerCase()
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53
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if (aesModes[suite]) return aes.createDecipheriv(suite, key, iv)
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54
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if (desModes[suite]) return new DES({ key: key, iv: iv, mode: suite, decrypt: true })
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55
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56
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throw new TypeError('invalid suite type')
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57
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}
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58
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59
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function getCiphers () {
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60
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return Object.keys(desModes).concat(aes.getCiphers())
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61
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}
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62
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63
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exports.createCipher = exports.Cipher = createCipher
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64
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exports.createCipheriv = exports.Cipheriv = createCipheriv
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65
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exports.createDecipher = exports.Decipher = createDecipher
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66
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exports.createDecipheriv = exports.Decipheriv = createDecipheriv
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67
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exports.listCiphers = exports.getCiphers = getCiphers
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