From e4556021dbcfb11834b8281677e9437a110844bf Mon Sep 17 00:00:00 2001 From: Aaron Voisine Date: Sat, 12 Apr 2014 00:07:46 -0700 Subject: Update bip-0038.mediawiki fixed some typos that made the spec inconsistent and confusing to implement --- bip-0038.mediawiki | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/bip-0038.mediawiki b/bip-0038.mediawiki index c4d062e..6a81be3 100644 --- a/bip-0038.mediawiki +++ b/bip-0038.mediawiki @@ -139,9 +139,9 @@ Steps to create new encrypted private keys given ''intermediate_passphrase_strin # Take the first four bytes of SHA256(SHA256(''generatedaddress'')) and call it ''addresshash''. # Now we will encrypt ''seedb''. Derive a second key from ''passpoint'' using scrypt #*Parameters: ''passphrase'' is ''passpoint'' provided from the first party (expressed in binary as 33 bytes). ''salt'' is ''addresshash'' + ''ownerentropy'', n=1024, r=1, p=1, length=64. The "+" operator is concatenation. -#*Split the result into two 16-byte halves and call them ''derivedhalf1'' and ''derivedhalf2''. -# Do AES256Encrypt(seedb[0...15]] xor derivedhalf1[0...15], derivedhalf2), call the 16-byte result ''encryptedpart1'' -# Do AES256Encrypt((encryptedpart1[8...15] + seedb[16...23]) xor derivedhalf1[16...31], derivedhalf2), call the 16-byte result ''encryptedseedb''. The "+" operator is concatenation. +#*Split the result into two 32-byte halves and call them ''derivedhalf1'' and ''derivedhalf2''. +# Do AES256Encrypt(seedb[0...15] xor derivedhalf1[0...15], derivedhalf2), call the 16-byte result ''encryptedpart1'' +# Do AES256Encrypt((encryptedpart1[8...15] + seedb[16...23]) xor derivedhalf1[16...31], derivedhalf2), call the 16-byte result ''encryptedpart2''. The "+" operator is concatenation. The encrypted private key is the Base58Check-encoded concatenation of the following, which totals 39 bytes without Base58 checksum: * 0x01 0x43 + ''flagbyte'' + ''addresshash'' + ''ownerentropy'' + ''encryptedpart1''[0...7] + ''encryptedpart2'' @@ -163,7 +163,7 @@ A confirmation tool, given a passphrase and a confirmation code, can recalculate =====Decryption===== # Collect encrypted private key and passphrase from user. -# Derive ''passfactor'' using scrypt with ''ownersalt'' and the user's passphrase and use it to recompute ''passpoint'' +# Derive ''passfactor'' using scrypt with ''ownerentropy'' and the user's passphrase and use it to recompute ''passpoint'' # Derive decryption key for ''seedb'' using scrypt with ''passpoint'', ''addresshash'', and ''ownersalt'' # Decrypt ''encryptedpart2'' using AES256Decrypt to yield the last 8 bytes of ''seedb'' and the last 8 bytes of ''encryptedpart1''. # Decrypt ''encryptedpart1'' to yield the remainder of ''seedb''. -- cgit v1.2.3