cis-kuldeep/PyBitmessage-2021-04-27
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Fix to Bitcoin-related functionality in arithmetic.py (thanks to Github user fcicq)

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This commit is contained in:
Jonathan Warren 2013-02-26 16:02:38 -05:00
parent 3d0bdeeb9d
commit 6c0a231a29
1 changed files with 6 additions and 3 deletions
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9
pyelliptic/arithmetic.py
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@ -70,7 +70,7 @@ def base10_multiply(a,n):
if (n%2) == 0: return base10_double(base10_multiply(a,n/2)) if (n%2) == 0: return base10_double(base10_multiply(a,n/2))
if (n%2) == 1: return base10_add(base10_double(base10_multiply(a,n/2)),a) if (n%2) == 1: return base10_add(base10_double(base10_multiply(a,n/2)),a)
def hex_to_point(h): return (decode(h[2:34],16),decode(h[34:],16)) def hex_to_point(h): return (decode(h[2:66],16),decode(h[66:],16))
def point_to_hex(p): return '04'+encode(p[0],16,64)+encode(p[1],16,64) def point_to_hex(p): return '04'+encode(p[0],16,64)+encode(p[1],16,64)
@ -86,9 +86,11 @@ def add(p1,p2):
else: else:
return point_to_hex(base10_add(hex_to_point(p1),hex_to_point(p2))) return point_to_hex(base10_add(hex_to_point(p1),hex_to_point(p2)))
def hash160(string): def hash_160(string):
intermed = hashlib.sha256(string).digest() intermed = hashlib.sha256(string).digest()
return hashlib.new('ripemd160').update(intermed).digest() ripemd160 = hashlib.new('ripemd160')
ripemd160.update(intermed)
return ripemd160.digest()
def dbl_sha256(string): def dbl_sha256(string):
return hashlib.sha256(hashlib.sha256(string).digest()).digest() return hashlib.sha256(hashlib.sha256(string).digest()).digest()
@ -99,5 +101,6 @@ def bin_to_b58check(inp):
checksum = dbl_sha256(inp_fmtd)[:4] checksum = dbl_sha256(inp_fmtd)[:4]
return '1' * leadingzbytes + changebase(inp_fmtd+checksum,256,58) return '1' * leadingzbytes + changebase(inp_fmtd+checksum,256,58)
#Convert a public key (in hex) to a Bitcoin address
def pubkey_to_address(pubkey): def pubkey_to_address(pubkey):
return bin_to_b58check(hash_160(changebase(pubkey,16,256))) return bin_to_b58check(hash_160(changebase(pubkey,16,256)))