diff options
Diffstat (limited to 'javascript/olm_pk.js')
| -rw-r--r-- | javascript/olm_pk.js | 362 |
1 files changed, 0 insertions, 362 deletions
diff --git a/javascript/olm_pk.js b/javascript/olm_pk.js deleted file mode 100644 index 4690b90..0000000 --- a/javascript/olm_pk.js +++ /dev/null @@ -1,362 +0,0 @@ -function PkEncryption() { - var size = Module['_olm_pk_encryption_size'](); - this.buf = malloc(size); - this.ptr = Module['_olm_pk_encryption'](this.buf); -} - -function pk_encryption_method(wrapped) { - return function() { - var result = wrapped.apply(this, arguments); - if (result === OLM_ERROR) { - var message = UTF8ToString( - Module['_olm_pk_encryption_last_error'](arguments[0]) - ); - throw new Error("OLM." + message); - } - return result; - } -} - -PkEncryption.prototype['free'] = function() { - Module['_olm_clear_pk_encryption'](this.ptr); - free(this.ptr); -} - -PkEncryption.prototype['set_recipient_key'] = restore_stack(function(key) { - var key_array = array_from_string(key); - var key_buffer = stack(key_array); - pk_encryption_method(Module['_olm_pk_encryption_set_recipient_key'])( - this.ptr, key_buffer, key_array.length - ); -}); - -PkEncryption.prototype['encrypt'] = restore_stack(function( - plaintext -) { - var plaintext_buffer, ciphertext_buffer, plaintext_length, random, random_length; - try { - plaintext_length = lengthBytesUTF8(plaintext) - plaintext_buffer = malloc(plaintext_length + 1); - stringToUTF8(plaintext, plaintext_buffer, plaintext_length + 1); - random_length = pk_encryption_method( - Module['_olm_pk_encrypt_random_length'] - )(); - random = random_stack(random_length); - var ciphertext_length = pk_encryption_method( - Module['_olm_pk_ciphertext_length'] - )(this.ptr, plaintext_length); - ciphertext_buffer = malloc(ciphertext_length + NULL_BYTE_PADDING_LENGTH); - var mac_length = pk_encryption_method( - Module['_olm_pk_mac_length'] - )(this.ptr); - var mac_buffer = stack(mac_length + NULL_BYTE_PADDING_LENGTH); - setValue( - mac_buffer + mac_length, - 0, "i8" - ); - var ephemeral_length = pk_encryption_method( - Module['_olm_pk_key_length'] - )(); - var ephemeral_buffer = stack(ephemeral_length + NULL_BYTE_PADDING_LENGTH); - setValue( - ephemeral_buffer + ephemeral_length, - 0, "i8" - ); - pk_encryption_method(Module['_olm_pk_encrypt'])( - this.ptr, - plaintext_buffer, plaintext_length, - ciphertext_buffer, ciphertext_length, - mac_buffer, mac_length, - ephemeral_buffer, ephemeral_length, - random, random_length - ); - // UTF8ToString requires a null-terminated argument, so add the - // null terminator. - setValue( - ciphertext_buffer + ciphertext_length, - 0, "i8" - ); - return { - "ciphertext": UTF8ToString(ciphertext_buffer, ciphertext_length), - "mac": UTF8ToString(mac_buffer, mac_length), - "ephemeral": UTF8ToString(ephemeral_buffer, ephemeral_length) - }; - } finally { - if (random !== undefined) { - // clear out the random buffer, since it is key data - bzero(random, random_length); - } - if (plaintext_buffer !== undefined) { - // don't leave a copy of the plaintext in the heap. - bzero(plaintext_buffer, plaintext_length + 1); - free(plaintext_buffer); - } - if (ciphertext_buffer !== undefined) { - free(ciphertext_buffer); - } - } -}); - - -function PkDecryption() { - var size = Module['_olm_pk_decryption_size'](); - this.buf = malloc(size); - this.ptr = Module['_olm_pk_decryption'](this.buf); -} - -function pk_decryption_method(wrapped) { - return function() { - var result = wrapped.apply(this, arguments); - if (result === OLM_ERROR) { - var message = UTF8ToString( - Module['_olm_pk_decryption_last_error'](arguments[0]) - ); - throw new Error("OLM." + message); - } - return result; - } -} - -PkDecryption.prototype['free'] = function() { - Module['_olm_clear_pk_decryption'](this.ptr); - free(this.ptr); -} - -PkDecryption.prototype['init_with_private_key'] = restore_stack(function (private_key) { - var private_key_buffer = stack(private_key.length); - Module['HEAPU8'].set(private_key, private_key_buffer); - - var pubkey_length = pk_decryption_method( - Module['_olm_pk_key_length'] - )(); - var pubkey_buffer = stack(pubkey_length + NULL_BYTE_PADDING_LENGTH); - try { - pk_decryption_method(Module['_olm_pk_key_from_private'])( - this.ptr, - pubkey_buffer, pubkey_length, - private_key_buffer, private_key.length - ); - } finally { - // clear out our copy of the private key - bzero(private_key_buffer, private_key.length); - } - return UTF8ToString(pubkey_buffer, pubkey_length); -}); - -PkDecryption.prototype['generate_key'] = restore_stack(function () { - var random_length = pk_decryption_method( - Module['_olm_pk_private_key_length'] - )(); - var random_buffer = random_stack(random_length); - var pubkey_length = pk_decryption_method( - Module['_olm_pk_key_length'] - )(); - var pubkey_buffer = stack(pubkey_length + NULL_BYTE_PADDING_LENGTH); - try { - pk_decryption_method(Module['_olm_pk_key_from_private'])( - this.ptr, - pubkey_buffer, pubkey_length, - random_buffer, random_length - ); - } finally { - // clear out the random buffer (= private key) - bzero(random_buffer, random_length); - } - return UTF8ToString(pubkey_buffer, pubkey_length); -}); - -PkDecryption.prototype['get_private_key'] = restore_stack(function () { - var privkey_length = pk_encryption_method( - Module['_olm_pk_private_key_length'] - )(); - var privkey_buffer = stack(privkey_length); - pk_decryption_method(Module['_olm_pk_get_private_key'])( - this.ptr, - privkey_buffer, privkey_length - ); - // The inner Uint8Array creates a view of the buffer. The outer Uint8Array - // copies it to a new array to return, since the original buffer will get - // deallocated from the stack and could get overwritten. - var key_arr = new Uint8Array( - new Uint8Array(Module['HEAPU8'].buffer, privkey_buffer, privkey_length) - ); - bzero(privkey_buffer, privkey_length); // clear out our copy of the key - return key_arr; -}); - -PkDecryption.prototype['pickle'] = restore_stack(function (key) { - var key_array = array_from_string(key); - var pickle_length = pk_decryption_method( - Module['_olm_pickle_pk_decryption_length'] - )(this.ptr); - var key_buffer = stack(key_array); - var pickle_buffer = stack(pickle_length + NULL_BYTE_PADDING_LENGTH); - try { - pk_decryption_method(Module['_olm_pickle_pk_decryption'])( - this.ptr, key_buffer, key_array.length, pickle_buffer, pickle_length - ); - } finally { - // clear out copies of the pickle key - bzero(key_buffer, key_array.length) - for (var i = 0; i < key_array.length; i++) { - key_array[i] = 0; - } - } - return UTF8ToString(pickle_buffer, pickle_length); -}); - -PkDecryption.prototype['unpickle'] = restore_stack(function (key, pickle) { - var key_array = array_from_string(key); - var key_buffer = stack(key_array); - var pickle_array = array_from_string(pickle); - var pickle_buffer = stack(pickle_array); - var ephemeral_length = pk_decryption_method( - Module["_olm_pk_key_length"] - )(); - var ephemeral_buffer = stack(ephemeral_length + NULL_BYTE_PADDING_LENGTH); - try { - pk_decryption_method(Module['_olm_unpickle_pk_decryption'])( - this.ptr, key_buffer, key_array.length, pickle_buffer, - pickle_array.length, ephemeral_buffer, ephemeral_length - ); - } finally { - // clear out copies of the pickle key - bzero(key_buffer, key_array.length) - for (var i = 0; i < key_array.length; i++) { - key_array[i] = 0; - } - } - return UTF8ToString(ephemeral_buffer, ephemeral_length); -}); - -PkDecryption.prototype['decrypt'] = restore_stack(function ( - ephemeral_key, mac, ciphertext -) { - var plaintext_buffer, ciphertext_buffer, plaintext_max_length; - try { - var ciphertext_length = lengthBytesUTF8(ciphertext) - ciphertext_buffer = malloc(ciphertext_length + 1); - stringToUTF8(ciphertext, ciphertext_buffer, ciphertext_length + 1); - var ephemeralkey_array = array_from_string(ephemeral_key); - var ephemeralkey_buffer = stack(ephemeralkey_array); - var mac_array = array_from_string(mac); - var mac_buffer = stack(mac_array); - plaintext_max_length = pk_decryption_method(Module['_olm_pk_max_plaintext_length'])( - this.ptr, - ciphertext_length - ); - plaintext_buffer = malloc(plaintext_max_length + NULL_BYTE_PADDING_LENGTH); - var plaintext_length = pk_decryption_method(Module['_olm_pk_decrypt'])( - this.ptr, - ephemeralkey_buffer, ephemeralkey_array.length, - mac_buffer, mac_array.length, - ciphertext_buffer, ciphertext_length, - plaintext_buffer, plaintext_max_length - ); - // UTF8ToString requires a null-terminated argument, so add the - // null terminator. - setValue( - plaintext_buffer + plaintext_length, - 0, "i8" - ); - return UTF8ToString(plaintext_buffer, plaintext_length); - } finally { - if (plaintext_buffer !== undefined) { - // don't leave a copy of the plaintext in the heap. - bzero(plaintext_buffer, plaintext_length + 1); - free(plaintext_buffer); - } - if (ciphertext_buffer !== undefined) { - free(ciphertext_buffer); - } - } -}) - - -function PkSigning() { - var size = Module['_olm_pk_signing_size'](); - this.buf = malloc(size); - this.ptr = Module['_olm_pk_signing'](this.buf); -} - -function pk_signing_method(wrapped) { - return function() { - var result = wrapped.apply(this, arguments); - if (result === OLM_ERROR) { - var message = UTF8ToString( - Module['_olm_pk_signing_last_error'](arguments[0]) - ); - throw new Error("OLM." + message); - } - return result; - } -} - -PkSigning.prototype['free'] = function() { - Module['_olm_clear_pk_signing'](this.ptr); - free(this.ptr); -} - -PkSigning.prototype['init_with_seed'] = restore_stack(function (seed) { - var seed_buffer = stack(seed.length); - Module['HEAPU8'].set(seed, seed_buffer); - - var pubkey_length = pk_signing_method( - Module['_olm_pk_signing_public_key_length'] - )(); - var pubkey_buffer = stack(pubkey_length + NULL_BYTE_PADDING_LENGTH); - try { - pk_signing_method(Module['_olm_pk_signing_key_from_seed'])( - this.ptr, - pubkey_buffer, pubkey_length, - seed_buffer, seed.length - ); - } finally { - // clear out our copy of the seed - bzero(seed_buffer, seed.length); - } - return UTF8ToString(pubkey_buffer, pubkey_length); -}); - -PkSigning.prototype['generate_seed'] = restore_stack(function () { - var random_length = pk_signing_method( - Module['_olm_pk_signing_seed_length'] - )(); - var random_buffer = random_stack(random_length); - var key_arr = new Uint8Array( - new Uint8Array(Module['HEAPU8'].buffer, random_buffer, random_length) - ); - bzero(random_buffer, random_length); - return key_arr; -}); - -PkSigning.prototype['sign'] = restore_stack(function (message) { - // XXX: Should be able to sign any bytes rather than just strings, - // but this is consistent with encrypt for now. - //var message_buffer = stack(message.length); - //Module['HEAPU8'].set(message, message_buffer); - var message_buffer, message_length; - - try { - message_length = lengthBytesUTF8(message) - message_buffer = malloc(message_length + 1); - stringToUTF8(message, message_buffer, message_length + 1); - - var sig_length = pk_signing_method( - Module['_olm_pk_signature_length'] - )(); - var sig_buffer = stack(sig_length + NULL_BYTE_PADDING_LENGTH); - pk_signing_method(Module['_olm_pk_sign'])( - this.ptr, - message_buffer, message_length, - sig_buffer, sig_length - ); - return UTF8ToString(sig_buffer, sig_length); - } finally { - if (message_buffer !== undefined) { - // don't leave a copy of the plaintext in the heap. - bzero(message_buffer, message_length + 1); - free(message_buffer); - } - } -}); |