convert crypto.subtle.deriveKey result to hex string

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according to bip39 standard, I want to get seed from mnemonic words in javascript.

I use this code:

function mnemonicToSeed(mnemonic,passphrase){

    if (typeof passphrase != 'string') passphrase='';



    window.crypto.subtle.importKey(

        'raw',

        stringToArrayBuffer(mnemonic),

        {

            name: 'PBKDF2',

        },

        false,

        ['deriveKey']

    ).then((importedKey) => {



        crypto.subtle.deriveKey({

                name: "PBKDF2",

                salt: stringToArrayBuffer('mnemonic'+passphrase),

                iterations: 2048,

                hash: { name: 'SHA-512' }

            }, 

            importedKey,

            {

                name: 'HMAC',

                hash: 'SHA-512',

                length: 512

            },

            true,

            ['sign']

        ).then(function(derivedKey) {

            console.log('derivedKey: '+derivedKey);



        });

    });



}

but at last result of console.log('derivedKey: '+derivedKey); is this:

derivedKey: [object CryptoKey]

now how convert derivedKey to its corresponding seed as hex string ?

asked 2 days ago

saeid ezzati

162215

add a comment |

up vote
0
down vote

favorite

according to bip39 standard, I want to get seed from mnemonic words in javascript.

I use this code:

function mnemonicToSeed(mnemonic,passphrase){

    if (typeof passphrase != 'string') passphrase='';



    window.crypto.subtle.importKey(

        'raw',

        stringToArrayBuffer(mnemonic),

        {

            name: 'PBKDF2',

        },

        false,

        ['deriveKey']

    ).then((importedKey) => {



        crypto.subtle.deriveKey({

                name: "PBKDF2",

                salt: stringToArrayBuffer('mnemonic'+passphrase),

                iterations: 2048,

                hash: { name: 'SHA-512' }

            }, 

            importedKey,

            {

                name: 'HMAC',

                hash: 'SHA-512',

                length: 512

            },

            true,

            ['sign']

        ).then(function(derivedKey) {

            console.log('derivedKey: '+derivedKey);



        });

    });



}

but at last result of console.log('derivedKey: '+derivedKey); is this:

derivedKey: [object CryptoKey]

now how convert derivedKey to its corresponding seed as hex string ?

asked 2 days ago

saeid ezzati

162215

add a comment |

up vote
0
down vote

favorite

according to bip39 standard, I want to get seed from mnemonic words in javascript.

I use this code:

function mnemonicToSeed(mnemonic,passphrase){

    if (typeof passphrase != 'string') passphrase='';



    window.crypto.subtle.importKey(

        'raw',

        stringToArrayBuffer(mnemonic),

        {

            name: 'PBKDF2',

        },

        false,

        ['deriveKey']

    ).then((importedKey) => {



        crypto.subtle.deriveKey({

                name: "PBKDF2",

                salt: stringToArrayBuffer('mnemonic'+passphrase),

                iterations: 2048,

                hash: { name: 'SHA-512' }

            }, 

            importedKey,

            {

                name: 'HMAC',

                hash: 'SHA-512',

                length: 512

            },

            true,

            ['sign']

        ).then(function(derivedKey) {

            console.log('derivedKey: '+derivedKey);



        });

    });



}

but at last result of console.log('derivedKey: '+derivedKey); is this:

derivedKey: [object CryptoKey]

now how convert derivedKey to its corresponding seed as hex string ?

asked 2 days ago

saeid ezzati

162215

according to bip39 standard, I want to get seed from mnemonic words in javascript.

I use this code:

function mnemonicToSeed(mnemonic,passphrase){

    if (typeof passphrase != 'string') passphrase='';



    window.crypto.subtle.importKey(

        'raw',

        stringToArrayBuffer(mnemonic),

        {

            name: 'PBKDF2',

        },

        false,

        ['deriveKey']

    ).then((importedKey) => {



        crypto.subtle.deriveKey({

                name: "PBKDF2",

                salt: stringToArrayBuffer('mnemonic'+passphrase),

                iterations: 2048,

                hash: { name: 'SHA-512' }

            }, 

            importedKey,

            {

                name: 'HMAC',

                hash: 'SHA-512',

                length: 512

            },

            true,

            ['sign']

        ).then(function(derivedKey) {

            console.log('derivedKey: '+derivedKey);



        });

    });



}

but at last result of console.log('derivedKey: '+derivedKey); is this:

derivedKey: [object CryptoKey]

now how convert derivedKey to its corresponding seed as hex string ?

javascript cryptography

asked 2 days ago

saeid ezzati

162215

asked 2 days ago

saeid ezzati

162215

asked 2 days ago

saeid ezzati

162215

asked 2 days ago

saeid ezzati

162215

asked 2 days ago

saeid ezzati

162215

add a comment |

1 Answer
1

active

oldest

votes

up vote
0
down vote

finally I found that with crypto.subtle.exportKey I can get result of CryptoKey as ArrayBuffer

window.crypto.subtle.importKey(

    'raw',

    stringToArrayBuffer(mnemonic),

    {

        name: 'PBKDF2',

    },

    false,

    ['deriveKey']

).then((importedKey) => {



    crypto.subtle.deriveKey({

            name: "PBKDF2",

            salt: stringToArrayBuffer('mnemonic'+passphrase),

            iterations: 2048,

            hash: { name: 'SHA-512' }

        }, 

        importedKey,

        {

            name: 'HMAC',

            hash: 'SHA-512',

            length: 512

        },

        true,

        ['sign']

    ).then(function(derivedKey) {



        crypto.subtle.exportKey('raw',derivedKey).then((exportedKey) => {

            console.log(convertArrayBufferToHexaDecimal(exportedKey));

        });



    });

})



function convertArrayBufferToHexaDecimal(buffer) 

{

    var data_view = new DataView(buffer)

    var iii, len, hex = '', c;



    for(iii = 0, len = data_view.byteLength; iii < len; iii += 1) 

    {

        c = data_view.getUint8(iii).toString(16);

        if(c.length < 2) 

        {

            c = '0' + c;

        }



        hex += c;

    }



    return hex;

}

edited yesterday

answered yesterday

saeid ezzati

162215

add a comment |

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up vote
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down vote

finally I found that with crypto.subtle.exportKey I can get result of CryptoKey as ArrayBuffer

window.crypto.subtle.importKey(

    'raw',

    stringToArrayBuffer(mnemonic),

    {

        name: 'PBKDF2',

    },

    false,

    ['deriveKey']

).then((importedKey) => {



    crypto.subtle.deriveKey({

            name: "PBKDF2",

            salt: stringToArrayBuffer('mnemonic'+passphrase),

            iterations: 2048,

            hash: { name: 'SHA-512' }

        }, 

        importedKey,

        {

            name: 'HMAC',

            hash: 'SHA-512',

            length: 512

        },

        true,

        ['sign']

    ).then(function(derivedKey) {



        crypto.subtle.exportKey('raw',derivedKey).then((exportedKey) => {

            console.log(convertArrayBufferToHexaDecimal(exportedKey));

        });



    });

})



function convertArrayBufferToHexaDecimal(buffer) 

{

    var data_view = new DataView(buffer)

    var iii, len, hex = '', c;



    for(iii = 0, len = data_view.byteLength; iii < len; iii += 1) 

    {

        c = data_view.getUint8(iii).toString(16);

        if(c.length < 2) 

        {

            c = '0' + c;

        }



        hex += c;

    }



    return hex;

}

edited yesterday

answered yesterday

saeid ezzati

162215

add a comment |

up vote
0
down vote

finally I found that with crypto.subtle.exportKey I can get result of CryptoKey as ArrayBuffer

window.crypto.subtle.importKey(

    'raw',

    stringToArrayBuffer(mnemonic),

    {

        name: 'PBKDF2',

    },

    false,

    ['deriveKey']

).then((importedKey) => {



    crypto.subtle.deriveKey({

            name: "PBKDF2",

            salt: stringToArrayBuffer('mnemonic'+passphrase),

            iterations: 2048,

            hash: { name: 'SHA-512' }

        }, 

        importedKey,

        {

            name: 'HMAC',

            hash: 'SHA-512',

            length: 512

        },

        true,

        ['sign']

    ).then(function(derivedKey) {



        crypto.subtle.exportKey('raw',derivedKey).then((exportedKey) => {

            console.log(convertArrayBufferToHexaDecimal(exportedKey));

        });



    });

})



function convertArrayBufferToHexaDecimal(buffer) 

{

    var data_view = new DataView(buffer)

    var iii, len, hex = '', c;



    for(iii = 0, len = data_view.byteLength; iii < len; iii += 1) 

    {

        c = data_view.getUint8(iii).toString(16);

        if(c.length < 2) 

        {

            c = '0' + c;

        }



        hex += c;

    }



    return hex;

}

edited yesterday

answered yesterday

saeid ezzati

162215

add a comment |

up vote
0
down vote

finally I found that with crypto.subtle.exportKey I can get result of CryptoKey as ArrayBuffer

window.crypto.subtle.importKey(

    'raw',

    stringToArrayBuffer(mnemonic),

    {

        name: 'PBKDF2',

    },

    false,

    ['deriveKey']

).then((importedKey) => {



    crypto.subtle.deriveKey({

            name: "PBKDF2",

            salt: stringToArrayBuffer('mnemonic'+passphrase),

            iterations: 2048,

            hash: { name: 'SHA-512' }

        }, 

        importedKey,

        {

            name: 'HMAC',

            hash: 'SHA-512',

            length: 512

        },

        true,

        ['sign']

    ).then(function(derivedKey) {



        crypto.subtle.exportKey('raw',derivedKey).then((exportedKey) => {

            console.log(convertArrayBufferToHexaDecimal(exportedKey));

        });



    });

})



function convertArrayBufferToHexaDecimal(buffer) 

{

    var data_view = new DataView(buffer)

    var iii, len, hex = '', c;



    for(iii = 0, len = data_view.byteLength; iii < len; iii += 1) 

    {

        c = data_view.getUint8(iii).toString(16);

        if(c.length < 2) 

        {

            c = '0' + c;

        }



        hex += c;

    }



    return hex;

}

edited yesterday

answered yesterday

saeid ezzati

162215

finally I found that with crypto.subtle.exportKey I can get result of CryptoKey as ArrayBuffer

window.crypto.subtle.importKey(

    'raw',

    stringToArrayBuffer(mnemonic),

    {

        name: 'PBKDF2',

    },

    false,

    ['deriveKey']

).then((importedKey) => {



    crypto.subtle.deriveKey({

            name: "PBKDF2",

            salt: stringToArrayBuffer('mnemonic'+passphrase),

            iterations: 2048,

            hash: { name: 'SHA-512' }

        }, 

        importedKey,

        {

            name: 'HMAC',

            hash: 'SHA-512',

            length: 512

        },

        true,

        ['sign']

    ).then(function(derivedKey) {



        crypto.subtle.exportKey('raw',derivedKey).then((exportedKey) => {

            console.log(convertArrayBufferToHexaDecimal(exportedKey));

        });



    });

})



function convertArrayBufferToHexaDecimal(buffer) 

{

    var data_view = new DataView(buffer)

    var iii, len, hex = '', c;



    for(iii = 0, len = data_view.byteLength; iii < len; iii += 1) 

    {

        c = data_view.getUint8(iii).toString(16);

        if(c.length < 2) 

        {

            c = '0' + c;

        }



        hex += c;

    }



    return hex;

}

edited yesterday

answered yesterday

saeid ezzati

162215

edited yesterday

answered yesterday

saeid ezzati

162215

answered yesterday

saeid ezzati

162215

answered yesterday

saeid ezzati

162215

add a comment |

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