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Update bip-0038.mediawiki

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fixed some typos that made the spec inconsistent and confusing to implement
This commit is contained in:
Aaron Voisine 2014-04-12 00:07:46 -07:00
parent 243524acde
commit e4556021db
1 changed files with 4 additions and 4 deletions
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@ -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''.