start privatekey

Libraries external/NYMnemonic/NYMnemonic.h

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+// NYMnemonic.h
+//
+// Copyright (c) 2014 Nybex, Inc. (https://nybex.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <Foundation/Foundation.h>
+#import <CommonCrypto/CommonHMAC.h>
+#import <CommonCrypto/CommonKeyDerivation.h>
+
+/**
+ `NYMnemonic` is an objective-c implimentation of BIP-39 style mnemonic codes
+ for use with generating deterministic keys.
+ */
+@interface NYMnemonic : NSObject
+
+/**
+ Creates a mnemonic code from a hex encoded seed.
+
+ @param seed The hex encoded random seed. Should be between 128-256 bits
+ @param language The language file to use. Currently the only value is 'english'
+
+ @return a string containing the mnemonic code
+ */
++ (NSString *)mnemonicStringFromRandomHexString:(NSString *)seed
+                                       language:(NSString *)language;
+/**
+ Creates a mnemonic code from a hex encoded seed.
+
+ @param mnemonic The mnemonic phrase to use as the deterministic seed
+ @param passphrase A passphrase to be applied when creating the seed
+ @param language The language file to use. Currently the only value is 'english'
+
+ @return a string containing the deterministic seed
+ */
++ (NSString *)deterministicSeedStringFromMnemonicString:(NSString *)mnemonic
+                                             passphrase:(NSString *)passphrase
+                                               language:(NSString *)language;
+
+/**
+ Creates a mnemonic code from a hex encoded seed.
+
+ @param strength The strength of code, should be >=128 & <=256 & divisible by 32
+ @param language The language file to use. Currently the only value is 'english'
+
+ @return a string containing the mnemonic code
+ */
++ (NSString *)generateMnemonicString:(NSNumber *)strength
+                            language:(NSString *)language;
+@end
+
+/**
+ Category on NSData that helps with conversion to bit arrays and to hex
+ strings.
+ */
+@interface NSData (NYMnemonic)
+- (NSString *)ny_hexString;
+- (NSArray *)ny_hexToBitArray;
+@end
+
+/**
+ Category on NSString to convert a hex string to NSData
+ @return NSData
+ */
+@interface NSString (NYMnemonic)
+- (NSData *)ny_dataFromHexString;
+@end

Libraries external/NYMnemonic/NYMnemonic.m

@@ -0,0 +1,199 @@
+// NYMnemonic.m
+//
+// Copyright (c) 2014 Nybex, Inc. (https://nybex.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+#import "NYMnemonic.h"
+
+@implementation NYMnemonic
++ (NSString *)mnemonicStringFromRandomHexString:(NSString *)seed language:(NSString *)language {
+
+    // Convert our hex string to NSData
+    NSData *seedData = [seed ny_dataFromHexString];
+
+    // Calculate the sha256 hash to use with a checksum
+    NSMutableData *hash = [NSMutableData dataWithLength:CC_SHA256_DIGEST_LENGTH];
+    CC_SHA256(seedData.bytes, (int)seedData.length, hash.mutableBytes);
+
+    NSMutableArray *checksumBits = [NSMutableArray
+      arrayWithArray:[[NSData dataWithData:hash] ny_hexToBitArray]];
+    NSMutableArray *seedBits =
+      [NSMutableArray arrayWithArray:[seedData ny_hexToBitArray]];
+
+    // Append the appropriate checksum bits to the seed
+    for (int i = 0; i < (int)seedBits.count / 32; i++) {
+        [seedBits addObject: checksumBits[i]];
+    }
+    NSString *path = [NSString stringWithFormat:@"%@/%@.txt", [[NSBundle mainBundle] bundlePath], language];
+    NSString *fileText = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:NULL];
+    NSArray *lines = [fileText componentsSeparatedByCharactersInSet: [NSCharacterSet newlineCharacterSet]];
+
+    // Split into groups of 11, and change to numbers
+    NSMutableArray *words = [NSMutableArray arrayWithCapacity:(int)seedBits.count / 11];
+    for (int i = 0; i < (int)seedBits.count / 11; i++) {
+        NSUInteger wordNumber =
+            strtol(
+                [[[seedBits subarrayWithRange: NSMakeRange(i * 11, 11)] componentsJoinedByString: @""] UTF8String],
+                NULL,
+                2);
+
+        [words addObject: lines[wordNumber]];
+    }
+
+    return [words componentsJoinedByString:@" "];
+}
+
++ (NSString *)deterministicSeedStringFromMnemonicString:(NSString *)mnemonic
+                                             passphrase:(NSString *)passphrase
+                                               language:(NSString *)language {
+
+    NSData *data = [mnemonic dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
+    NSString *dataString = [[NSString alloc] initWithData: data encoding: NSASCIIStringEncoding];
+    NSData *normalized = [dataString dataUsingEncoding: NSASCIIStringEncoding allowLossyConversion: NO];
+
+    NSData *saltData =
+      [[@"mnemonic" stringByAppendingString: [[NSString alloc] initWithData:[passphrase dataUsingEncoding: NSASCIIStringEncoding
+                                                       allowLossyConversion:YES]
+                                     encoding:NSASCIIStringEncoding]]
+       dataUsingEncoding: NSASCIIStringEncoding
+       allowLossyConversion: NO];
+
+    NSMutableData *hashKeyData =
+      [NSMutableData dataWithLength:CC_SHA512_DIGEST_LENGTH];
+
+    CCKeyDerivationPBKDF(kCCPBKDF2, normalized.bytes, normalized.length,
+                       saltData.bytes, saltData.length, kCCPRFHmacAlgSHA512,
+                       2048, hashKeyData.mutableBytes, hashKeyData.length);
+
+    return [[NSData dataWithData:hashKeyData] ny_hexString];
+}
+
++ (NSString *)generateMnemonicString:(NSNumber *)strength
+                            language:(NSString *)language {
+
+    // Check that the strength is divisible by 32
+    if ([strength intValue] % 32 != 0) {
+        [NSException raise:@"Strength must be divisible by 32"
+                    format:@"Strength Was: %@", strength];
+    }
+
+    // Create an array of bytes
+    NSMutableData *bytes = [NSMutableData dataWithLength: ([strength integerValue]/8)];
+    // Generate the random data
+    int status = SecRandomCopyBytes(kSecRandomDefault, bytes.length, bytes.mutableBytes);
+    // Make sure we were successful
+    if (status != -1) {
+        return [self mnemonicStringFromRandomHexString:[bytes ny_hexString] language:language];
+    } else {
+        [NSException raise:@"Unable to get random data!"
+                    format:@"Unable to get random data!"];
+    }
+    return nil;
+}
+@end
+
+@implementation NSData (NYMnemonic)
+- (NSString *)ny_hexString {
+    const unsigned char *dataBuffer = (const unsigned char *)[self bytes];
+
+    if (!dataBuffer) {
+        return [NSString string];
+    }
+
+    NSUInteger dataLength = [self length];
+    NSMutableString *hexString = [NSMutableString stringWithCapacity:(dataLength * 2)];
+    for (int i = 0; i < dataLength; ++i) {
+        [hexString appendString:[NSString stringWithFormat:@"%02lx", (unsigned long)dataBuffer[i]]];
+    }
+
+    return [NSString stringWithString:hexString];
+}
+
+- (NSArray *)ny_hexToBitArray {
+    NSMutableArray *bitArray = [NSMutableArray arrayWithCapacity:(int)self.length * 8];
+    NSString *hexStr = [self ny_hexString];
+    // Loop over the string and convert each char
+    for (NSUInteger i = 0; i < [hexStr length]; i++) {
+        NSString *bin = [self _hexToBinary:[hexStr characterAtIndex:i]];
+        // Each character will return a string representation of the binary
+        // Create NSNumbers from each and append to the array.
+        for (NSInteger j = 0; j < bin.length; j++) {
+            [bitArray addObject:
+                @([[NSString stringWithFormat: @"%C", [bin characterAtIndex: j]] intValue])];
+        }
+    }
+    return [NSArray arrayWithArray:bitArray];
+}
+
+- (NSString *)_hexToBinary:(unichar)value {
+    switch (value) {
+        case '0': return @"0000";
+        case '1': return @"0001";
+        case '2': return @"0010";
+        case '3': return @"0011";
+        case '4': return @"0100";
+        case '5': return @"0101";
+        case '6': return @"0110";
+        case '7': return @"0111";
+        case '8': return @"1000";
+        case '9': return @"1001";
+
+        case 'a':
+        case 'A': return @"1010";
+
+        case 'b':
+        case 'B': return @"1011";
+
+        case 'c':
+        case 'C': return @"1100";
+
+        case 'd':
+        case 'D': return @"1101";
+
+        case 'e':
+        case 'E': return @"1110";
+
+        case 'f':
+        case 'F': return @"1111";
+    }
+    return @"-1";
+}
+
+@end
+
+@implementation NSString (NYMnemonic)
+- (NSData *)ny_dataFromHexString {
+    const char *chars = [self UTF8String];
+    int i = 0, len = (int)self.length;
+
+    NSMutableData *data = [NSMutableData dataWithCapacity:len / 2];
+    char byteChars[3] = { '\0', '\0', '\0' };
+    unsigned long wholeByte;
+
+    while (i < len) {
+        byteChars[0] = chars[i++];
+        byteChars[1] = chars[i++];
+        wholeByte = strtoul(byteChars, NULL, 16);
+        [data appendBytes:&wholeByte length:1];
+    }
+
+    return data;
+}
+
+@end

Libraries external/NYMnemonic/languages/english.txt

@@ -0,0 +1,2048 @@
+abandon
+ability
+able
+about
+above
+absent
+absorb
+abstract
+absurd
+abuse
+access
+accident
+account
+accuse
+achieve
+acid
+acoustic
+acquire
+across
+act
+action
+actor
+actress
+actual
+adapt
+add
+addict
+address
+adjust
+admit
+adult
+advance
+advice
+aerobic
+affair
+afford
+afraid
+again
+age
+agent
+agree
+ahead
+aim
+air
+airport
+aisle
+alarm
+album
+alcohol
+alert
+alien
+all
+alley
+allow
+almost
+alone
+alpha
+already
+also
+alter
+always
+amateur
+amazing
+among
+amount
+amused
+analyst
+anchor
+ancient
+anger
+angle
+angry
+animal
+ankle
+announce
+annual
+another
+answer
+antenna
+antique
+anxiety
+any
+apart
+apology
+appear
+apple
+approve
+april
+arch
+arctic
+area
+arena
+argue
+arm
+armed
+armor
+army
+around
+arrange
+arrest
+arrive
+arrow
+art
+artefact
+artist
+artwork
+ask
+aspect
+assault
+asset
+assist
+assume
+asthma
+athlete
+atom
+attack
+attend
+attitude
+attract
+auction
+audit
+august
+aunt
+author
+auto
+autumn
+average
+avocado
+avoid
+awake
+aware
+away
+awesome
+awful
+awkward
+axis
+baby
+bachelor
+bacon
+badge
+bag
+balance
+balcony
+ball
+bamboo
+banana
+banner
+bar
+barely
+bargain
+barrel
+base
+basic
+basket
+battle
+beach
+bean
+beauty
+because
+become
+beef
+before
+begin
+behave
+behind
+believe
+below
+belt
+bench
+benefit
+best
+betray
+better
+between
+beyond
+bicycle
+bid
+bike
+bind
+biology
+bird
+birth
+bitter
+black
+blade
+blame
+blanket
+blast
+bleak
+bless
+blind
+blood
+blossom
+blouse
+blue
+blur
+blush
+board
+boat
+body
+boil
+bomb
+bone
+bonus
+book
+boost
+border
+boring
+borrow
+boss
+bottom
+bounce
+box
+boy
+bracket
+brain
+brand
+brass
+brave
+bread
+breeze
+brick
+bridge
+brief
+bright
+bring
+brisk
+broccoli
+broken
+bronze
+broom
+brother
+brown
+brush
+bubble
+buddy
+budget
+buffalo
+build
+bulb
+bulk
+bullet
+bundle
+bunker
+burden
+burger
+burst
+bus
+business
+busy
+butter
+buyer
+buzz
+cabbage
+cabin
+cable
+cactus
+cage
+cake
+call
+calm
+camera
+camp
+can
+canal
+cancel
+candy
+cannon
+canoe
+canvas
+canyon
+capable
+capital
+captain
+car
+carbon
+card
+cargo
+carpet
+carry
+cart
+case
+cash
+casino
+castle
+casual
+cat
+catalog
+catch
+category
+cattle
+caught
+cause
+caution
+cave
+ceiling
+celery
+cement
+census
+century
+cereal
+certain
+chair
+chalk
+champion
+change
+chaos
+chapter
+charge
+chase
+chat
+cheap
+check
+cheese
+chef
+cherry
+chest
+chicken
+chief
+child
+chimney
+choice
+choose
+chronic
+chuckle
+chunk
+churn
+cigar
+cinnamon
+circle
+citizen
+city
+civil
+claim
+clap
+clarify
+claw
+clay
+clean
+clerk
+clever
+click
+client
+cliff
+climb
+clinic
+clip
+clock
+clog
+close
+cloth
+cloud
+clown
+club
+clump
+cluster
+clutch
+coach
+coast
+coconut
+code
+coffee
+coil
+coin
+collect
+color
+column
+combine
+come
+comfort
+comic
+common
+company
+concert
+conduct
+confirm
+congress
+connect
+consider
+control
+convince
+cook
+cool
+copper
+copy
+coral
+core
+corn
+correct
+cost
+cotton
+couch
+country
+couple
+course
+cousin
+cover
+coyote
+crack
+cradle
+craft
+cram
+crane
+crash
+crater
+crawl
+crazy
+cream
+credit
+creek
+crew
+cricket
+crime
+crisp
+critic
+crop
+cross
+crouch
+crowd
+crucial
+cruel
+cruise
+crumble
+crunch
+crush
+cry
+crystal
+cube
+culture
+cup
+cupboard
+curious
+current
+curtain
+curve
+cushion
+custom
+cute
+cycle
+dad
+damage
+damp
+dance
+danger
+daring
+dash
+daughter
+dawn
+day
+deal
+debate
+debris
+decade
+december
+decide
+decline
+decorate
+decrease
+deer
+defense
+define
+defy
+degree
+delay
+deliver
+demand
+demise
+denial
+dentist
+deny
+depart
+depend
+deposit
+depth
+deputy
+derive
+describe
+desert
+design
+desk
+despair
+destroy
+detail
+detect
+develop
+device
+devote
+diagram
+dial
+diamond
+diary
+dice
+diesel
+diet
+differ
+digital
+dignity
+dilemma
+dinner
+dinosaur
+direct
+dirt
+disagree
+discover
+disease
+dish
+dismiss
+disorder
+display
+distance
+divert
+divide
+divorce
+dizzy
+doctor
+document
+dog
+doll
+dolphin
+domain
+donate
+donkey
+donor
+door
+dose
+double
+dove
+draft
+dragon
+drama
+drastic
+draw
+dream
+dress
+drift
+drill
+drink
+drip
+drive
+drop
+drum
+dry
+duck
+dumb
+dune
+during
+dust
+dutch
+duty
+dwarf
+dynamic
+eager
+eagle
+early
+earn
+earth
+easily
+east
+easy
+echo
+ecology
+economy
+edge
+edit
+educate
+effort
+egg
+eight
+either
+elbow
+elder
+electric
+elegant
+element
+elephant
+elevator
+elite
+else
+embark
+embody
+embrace
+emerge
+emotion
+employ
+empower
+empty
+enable
+enact
+end
+endless
+endorse
+enemy
+energy
+enforce
+engage
+engine
+enhance
+enjoy
+enlist
+enough
+enrich
+enroll
+ensure
+enter
+entire
+entry
+envelope
+episode
+equal
+equip
+era
+erase
+erode
+erosion
+error
+erupt
+escape
+essay
+essence
+estate
+eternal
+ethics
+evidence
+evil
+evoke
+evolve
+exact
+example
+excess
+exchange
+excite
+exclude
+excuse
+execute
+exercise
+exhaust
+exhibit
+exile
+exist
+exit
+exotic
+expand
+expect
+expire
+explain
+expose
+express
+extend
+extra
+eye
+eyebrow
+fabric
+face
+faculty
+fade
+faint
+faith
+fall
+false
+fame
+family
+famous
+fan
+fancy
+fantasy
+farm
+fashion
+fat
+fatal
+father
+fatigue
+fault
+favorite
+feature
+february
+federal
+fee
+feed
+feel
+female
+fence
+festival
+fetch
+fever
+few
+fiber
+fiction
+field
+figure
+file
+film
+filter
+final
+find
+fine
+finger
+finish
+fire
+firm
+first
+fiscal
+fish
+fit
+fitness
+fix
+flag
+flame
+flash
+flat
+flavor
+flee
+flight
+flip
+float
+flock
+floor
+flower
+fluid
+flush
+fly
+foam
+focus
+fog
+foil
+fold
+follow
+food
+foot
+force
+forest
+forget
+fork
+fortune
+forum
+forward
+fossil
+foster
+found
+fox
+fragile
+frame
+frequent
+fresh
+friend
+fringe
+frog
+front
+frost
+frown
+frozen
+fruit
+fuel
+fun
+funny
+furnace
+fury
+future
+gadget
+gain
+galaxy
+gallery
+game
+gap
+garage
+garbage
+garden
+garlic
+garment
+gas
+gasp
+gate
+gather
+gauge
+gaze
+general
+genius
+genre
+gentle
+genuine
+gesture
+ghost
+giant
+gift
+giggle
+ginger
+giraffe
+girl
+give
+glad
+glance
+glare
+glass
+glide
+glimpse
+globe
+gloom
+glory
+glove
+glow
+glue
+goat
+goddess
+gold
+good
+goose
+gorilla
+gospel
+gossip
+govern
+gown
+grab
+grace
+grain
+grant
+grape
+grass
+gravity
+great
+green
+grid
+grief
+grit
+grocery
+group
+grow
+grunt
+guard
+guess
+guide
+guilt
+guitar
+gun
+gym
+habit
+hair
+half
+hammer
+hamster
+hand
+happy
+harbor
+hard
+harsh
+harvest
+hat
+have
+hawk
+hazard
+head
+health
+heart
+heavy
+hedgehog
+height
+hello
+helmet
+help
+hen
+hero
+hidden
+high
+hill
+hint
+hip
+hire
+history
+hobby
+hockey
+hold
+hole
+holiday
+hollow
+home
+honey
+hood
+hope
+horn
+horror
+horse
+hospital
+host
+hotel
+hour
+hover
+hub
+huge
+human
+humble
+humor
+hundred
+hungry
+hunt
+hurdle
+hurry
+hurt
+husband
+hybrid
+ice
+icon
+idea
+identify
+idle
+ignore
+ill
+illegal
+illness
+image
+imitate
+immense
+immune
+impact
+impose
+improve
+impulse
+inch
+include
+income
+increase
+index
+indicate
+indoor
+industry
+infant
+inflict
+inform
+inhale
+inherit
+initial
+inject
+injury
+inmate
+inner
+innocent
+input
+inquiry
+insane
+insect
+inside
+inspire
+install
+intact
+interest
+into
+invest
+invite
+involve
+iron
+island
+isolate
+issue
+item
+ivory
+jacket
+jaguar
+jar
+jazz
+jealous
+jeans
+jelly
+jewel
+job
+join
+joke
+journey
+joy
+judge
+juice
+jump
+jungle
+junior
+junk
+just
+kangaroo
+keen
+keep
+ketchup
+key
+kick
+kid
+kidney
+kind
+kingdom
+kiss
+kit
+kitchen
+kite
+kitten
+kiwi
+knee
+knife
+knock
+know
+lab
+label
+labor
+ladder
+lady
+lake
+lamp
+language
+laptop
+large
+later
+latin
+laugh
+laundry
+lava
+law
+lawn
+lawsuit
+layer
+lazy
+leader
+leaf
+learn
+leave
+lecture
+left
+leg
+legal
+legend
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+until
+unusual
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+update
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+upon
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Nextcloud.xcodeproj/project.pbxproj

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+		F7FD60491F8FBAD7007FE2DF /* NYMnemonic.m in Sources */ = {isa = PBXBuildFile; fileRef = F7FD60481F8FB996007FE2DF /* NYMnemonic.m */; };
+		F7FD604A1F8FBAD7007FE2DF /* NYMnemonic.m in Sources */ = {isa = PBXBuildFile; fileRef = F7FD60481F8FB996007FE2DF /* NYMnemonic.m */; };
+		F7FD604B1F8FBAD8007FE2DF /* NYMnemonic.m in Sources */ = {isa = PBXBuildFile; fileRef = F7FD60481F8FB996007FE2DF /* NYMnemonic.m */; };
+		F7FD604C1F8FBAD8007FE2DF /* NYMnemonic.m in Sources */ = {isa = PBXBuildFile; fileRef = F7FD60481F8FB996007FE2DF /* NYMnemonic.m */; };
+		F7FD604D1F8FBADF007FE2DF /* english.txt in Resources */ = {isa = PBXBuildFile; fileRef = F7FD60461F8FB996007FE2DF /* english.txt */; };
+		F7FD604E1F8FBAE0007FE2DF /* english.txt in Resources */ = {isa = PBXBuildFile; fileRef = F7FD60461F8FB996007FE2DF /* english.txt */; };
+		F7FD604F1F8FBAE0007FE2DF /* english.txt in Resources */ = {isa = PBXBuildFile; fileRef = F7FD60461F8FB996007FE2DF /* english.txt */; };
+		F7FD60501F8FBAE0007FE2DF /* english.txt in Resources */ = {isa = PBXBuildFile; fileRef = F7FD60461F8FB996007FE2DF /* english.txt */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -1497,6 +1505,9 @@
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+		F7FD60461F8FB996007FE2DF /* english.txt */ = {isa = PBXFileReference; lastKnownFileType = text; path = english.txt; sourceTree = "<group>"; };
+		F7FD60471F8FB996007FE2DF /* NYMnemonic.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = NYMnemonic.h; sourceTree = "<group>"; };
+		F7FD60481F8FB996007FE2DF /* NYMnemonic.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = NYMnemonic.m; sourceTree = "<group>"; };
 		F7FE125C1BAC03FB0041924B /* CCBKPasscode.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CCBKPasscode.h; sourceTree = "<group>"; };
 		F7FE125D1BAC03FB0041924B /* CCBKPasscode.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CCBKPasscode.m; sourceTree = "<group>"; };
 		F7FFEACD1F82BB1C005E5C17 /* CCCellMain.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; name = CCCellMain.h; path = Main/CCCellMain.h; sourceTree = "<group>"; };
@@ -1715,6 +1726,7 @@
 				F7659A2F1DC0B737004860C4 /* iRate */,
 				F70F04821C889183008DAB36 /* MBProgressHUD */,
 				F7DC5FD31F00F98B00A903C7 /* MGSwipeTableCell */,
+				F7FD60441F8FB996007FE2DF /* NYMnemonic */,
 				F7540EE11D5B238600C3FFA8 /* openssl */,
 				F75037421DBFA91A008FB480 /* PureLayout */,
 				F70F05241C889184008DAB36 /* Reachability */,
@@ -2978,6 +2990,24 @@
 			path = PeekPop;
 			sourceTree = "<group>";
 		};
+		F7FD60441F8FB996007FE2DF /* NYMnemonic */ = {
+			isa = PBXGroup;
+			children = (
+				F7FD60451F8FB996007FE2DF /* languages */,
+				F7FD60471F8FB996007FE2DF /* NYMnemonic.h */,
+				F7FD60481F8FB996007FE2DF /* NYMnemonic.m */,
+			);
+			path = NYMnemonic;
+			sourceTree = "<group>";
+		};
+		F7FD60451F8FB996007FE2DF /* languages */ = {
+			isa = PBXGroup;
+			children = (
+				F7FD60461F8FB996007FE2DF /* english.txt */,
+			);
+			path = languages;
+			sourceTree = "<group>";
+		};
 		F7FE125B1BAC03FB0041924B /* Security */ = {
 			isa = PBXGroup;
 			children = (
@@ -3174,6 +3204,7 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				F7FD604E1F8FBAE0007FE2DF /* english.txt in Resources */,
 				F78BFEE11D31126B00E513CF /* MainInterface.storyboard in Resources */,
 				F7145A1A1D12E3B700CAFEEC /* Images.xcassets in Resources */,
 				F7145A1C1D12E3B700CAFEEC /* CCMove.storyboard in Resources */,
@@ -3191,6 +3222,7 @@
 			files = (
 				F7FC88FD1E141A3F006D0506 /* Error.strings in Resources */,
 				F70944BD1F86364000AE4541 /* MainInterface.storyboard in Resources */,
+				F7FD604F1F8FBAE0007FE2DF /* english.txt in Resources */,
 				F7FC88FB1E141A34006D0506 /* BKPasscodeView.strings in Resources */,
 				F7FC88FC1E141A39006D0506 /* Localizable.strings in Resources */,
 				F700222E1EC479840080073F /* Custom.xcassets in Resources */,
@@ -3205,6 +3237,7 @@
 				F7BB50C81F22384700C47094 /* Error.strings in Resources */,
 				F7BB50C61F22383D00C47094 /* BKPasscodeView.strings in Resources */,
 				F7BB50C71F22384100C47094 /* Localizable.strings in Resources */,
+				F7FD60501F8FBAE0007FE2DF /* english.txt in Resources */,
 				F7BB50AE1F2236E900C47094 /* Custom.xcassets in Resources */,
 				F7BB50AD1F2236D100C47094 /* Images.xcassets in Resources */,
 			);
@@ -3277,6 +3310,7 @@
 				F77B0F571D118A16002130FE /* synchronizedcrypto.gif in Resources */,
 				F7F54CEE1E5B14C700E19C62 /* ImageSelectedSmallOff.png in Resources */,
 				F73B4EF31F470D9100BBEE4B /* GB2312Freq.tab in Resources */,
+				F7FD604D1F8FBADF007FE2DF /* english.txt in Resources */,
 				F7F54D051E5B14C800E19C62 /* VideoOverlay@3x.png in Resources */,
 				F7F54D011E5B14C700E19C62 /* UIBarButtonItemGrid@2x.png in Resources */,
 				F7F54CE71E5B14C700E19C62 /* ImageError@3x.png in Resources */,
@@ -3423,6 +3457,7 @@
 				F70022A81EC4C9100080073F /* AFSecurityPolicy.m in Sources */,
 				F70022AB1EC4C9100080073F /* AFURLRequestSerialization.m in Sources */,
 				F7145A001D12E3B700CAFEEC /* CCGlobal.m in Sources */,
+				F7FD604A1F8FBAD7007FE2DF /* NYMnemonic.m in Sources */,
 				F70022B41EC4C9100080073F /* OCActivity.m in Sources */,
 				F70022CC1EC4C9100080073F /* OCSharedDto.m in Sources */,
 				F70022DB1EC4C9100080073F /* OCHTTPRequestOperation.m in Sources */,
@@ -3474,6 +3509,7 @@
 				F70022D01EC4C9100080073F /* OCShareUser.m in Sources */,
 				F70022EB1EC4C9100080073F /* OCXMLShareByLinkParser.m in Sources */,
 				F743447B1E127EAC001CC831 /* CCUtility.m in Sources */,
+				F7FD604B1F8FBAD8007FE2DF /* NYMnemonic.m in Sources */,
 				F70022A91EC4C9100080073F /* AFSecurityPolicy.m in Sources */,
 				F70022BE1EC4C9100080073F /* OCExternalSites.m in Sources */,
 				F77EB6291EC08037003F814F /* CCExifGeo.m in Sources */,
@@ -3545,6 +3581,7 @@
 				F74344251E1264EE001CC831 /* FileProvider.swift in Sources */,
 				F7BB50BA1F22374A00C47094 /* CCNetworking.m in Sources */,
 				F7BB50DD1F2238B100C47094 /* NSString+Encode.m in Sources */,
+				F7FD604C1F8FBAD8007FE2DF /* NYMnemonic.m in Sources */,
 				F7BB50D51F22389600C47094 /* NSDate+RFC1123.m in Sources */,
 				F7BB50A31F2236C500C47094 /* CCGlobal.m in Sources */,
 				F76B3CD11EAE01BD00921AC9 /* NCBrand.swift in Sources */,
@@ -3705,6 +3742,7 @@
 				F762CAF91EACB66200B38484 /* XLFormCheckCell.m in Sources */,
 				F7BE6E2F1D2D5C3B00106933 /* CCQuickActions.m in Sources */,
 				F762CB101EACB66200B38484 /* NSPredicate+XLFormAdditions.m in Sources */,
+				F7FD60491F8FBAD7007FE2DF /* NYMnemonic.m in Sources */,
 				F7D424691F063B82009C9782 /* CTAssetsGridViewLayout.m in Sources */,
 				F7D4237E1F0596C6009C9782 /* ReaderDocument.m in Sources */,
 				F7D424661F063B82009C9782 /* CTAssetsGridViewCell.m in Sources */,

iOSClient/Main/CCMain.m

@@ -36,6 +36,7 @@
 #import "NCAutoUpload.h"
 #import "NCEndToEndEncryption.h"
 #import "NCBridgeSwift.h"
+#import "NYMnemonic.h"
 
 @interface CCMain () <CCActionsDeleteDelegate, CCActionsRenameDelegate, CCActionsSearchDelegate, CCActionsDownloadThumbnailDelegate, CCActionsSettingFavoriteDelegate, UITextViewDelegate, createFormUploadAssetsDelegate, MGSwipeTableCellDelegate, CCLoginDelegate, CCLoginDelegateWeb>
 {
@@ -1245,8 +1246,16 @@
             message = @"bad request: unpredictable internal error";
             [app messageNotification:@"E2E private key" description:message visible:YES delay:k_dismissAfterSecond type:TWMessageBarMessageTypeError errorCode:errorCode];
             break;
-        case 404:
-            message = @"private key doesn't exists";
+        case 404: {
+            
+                CCMetadataNet *metadataNet = [[CCMetadataNet alloc] initWithAccount:app.activeAccount];
+            
+                NSString *mnemonic = [NYMnemonic generateMnemonicString:@128 language:@"english"];
+
+                NSString *privateKeyEncoded = [[NCEndToEndEncryption sharedManager] createEndToEndPrivateKey:app.activeUserID directoryUser:app.directoryUser mnemonic:mnemonic];
+            
+                message = @"private key doesn't exists";
+            }
             break;
         case 409:
             message = @"forbidden: the user can't access the private key";
@@ -1264,6 +1273,8 @@
 - (void)getEndToEndPublicKeySuccess:(CCMetadataNet *)metadataNet
 {
     NSLog(@"OK");
+    
+    // Store signed key locally keychain
 }
 
 - (void)getEndToEndPublicKeyFailure:(CCMetadataNet *)metadataNet message:(NSString *)message errorCode:(NSInteger)errorCode

iOSClient/Security/NCEndToEndEncryption.h

@@ -35,5 +35,6 @@
 - (void)decryptMetadata:(tableMetadata *)metadata activeUrl:(NSString *)activeUrl;
 
 - (NSString *)createEndToEndPublicKey:(NSString *)userID directoryUser:(NSString *)directoryUser;
+- (NSString *)createEndToEndPrivateKey:(NSString *)userID directoryUser:(NSString *)directoryUser mnemonic:(NSString *)mnemonic;
 
 @end

iOSClient/Security/NCEndToEndEncryption.m

@@ -242,7 +242,6 @@ cleanup:
     return YES;
 }
 
-// generateCsrPemEncodedString
 - (NSString *)createEndToEndPublicKey:(NSString *)userID directoryUser:(NSString *)directoryUser
 {
     NSString *csrEncodeURL;
@@ -266,6 +265,11 @@ cleanup:
     return csrEncodeURL;
 }
 
+- (NSString *)createEndToEndPrivateKey:(NSString *)userID directoryUser:(NSString *)directoryUser mnemonic:(NSString *)mnemonic
+{
+    return nil;
+}
+
 #
 #pragma mark - Encrypt/Decrypt AES/GCM/NoPadding as cipher (128 bit key size)
 #