I am working on a program which does a lot of hashing, and in one of the steps I take a result of hashlib's ripemd160 hash and convert it into an integer. The lines are:
ripe_fruit = new('ripemd160', sha256(key.to_der()).digest())key_hash160 = struct.unpack("<Q", ripe_fruit.digest())[0]It gives me the error:
struct.error: unpack requires a buffer of 8 bytesI tried changing the value to L and other things, but they didn't work. How do I fix this?
I've been looking for standalone header-only sha256 and ripemd160 hash functions, preferably MIT licence, but GPL and others are fine too.
I found pico256, header only, I can integrate into a project. But I can't find both hash functions I need. I am not sure if I can just rip the bits out I want from OpenSSL, it's too big and complex.
If I can find a reasonable description of sha256 and ripemd160, I might have a go at implementing them myself.
Until then, does anyone know of either
a) standalone sha256 and ripemd160 C or C++ code I can compile into a project, or
b) a small library I can static link into a project?
I'm not sure how to do that with OpenSSL; I'm on Windows 10 and it always seems to want a DLL it generates for shared libraries. Maybe I'm just not building correctly for static linking without DLLs.
Thank you for any pointers or tips.
I am trying to build small app to generate Bitcoin Address (for sake of understanding).
I use OpenSSL library.
I managed to convert private key to public key, hashed public key with sha256, and result was fine. But, then, problem appears when I try to run sha256 result trough ripemd160.
- I tested ripemd160 function with plain string and it works fine
- I did converted sha256 result to string
- Still I get wrong result
Here's my main:
int _tmain(int argc, _TCHAR* argv[]){ char sha256_buffer[65]; char ripemd160_buffer[41]; char *pvt_key = "18E14A7B6A307F426A94F8114701E7C8E774E7F9A47E2C2035DB29A206321725"; unsigned char *pub_hex = priv2pub((const unsigned char *)pvt_key, POINT_CONVERSION_UNCOMPRESSED ); //printf("%s\n", pub_hex); std::string pub_key_string = hex_to_string(reinterpret_cast<char*>(pub_hex)); sha256(&pub_key_string[0], sha256_buffer); printf("%s\n", sha256_buffer); std::string hash256_string = hex_to_string(reinterpret_cast<char*>(sha256_buffer)); ripemd160(&hash256_string[0], ripemd160_buffer); printf("%s\n", ripemd160_buffer); return 0;}Here's my ripemd160 function:
void ripemd160(char *string, char outputBuffer[41]){ unsigned char hash[RIPEMD160_DIGEST_LENGTH]; RIPEMD160_CTX ripemd160; RIPEMD160_Init(&ripemd160); RIPEMD160_Update(&ripemd160, string, strlen(string)); RIPEMD160_Final(hash, &ripemd160); for (int i = 0; i < RIPEMD160_DIGEST_LENGTH; i++) { sprintf_s(outputBuffer + (i * 2), sizeof(outputBuffer + (i * 2)), "%02x", hash[i]); } outputBuffer[40] = 0;}Here's my hex to string function:
string hex_to_string(const string& in) { string output; if ((in.length() % 2) != 0) { throw runtime_error("String is not valid length ..."); } size_t cnt = in.length() / 2; for (size_t i = 0; cnt > i; ++i) { uint32_t s = 0; stringstream ss; ss << hex << in.substr(i * 2, 2); ss >> s; output.push_back(static_cast<unsigned char>(s)); } return output;}I am using example from
https://en.bitcoin.it/wiki/Technical_background_of_version_1_Bitcoin_addresses
This is the Ripemd-160 I suppose to get:010966776006953D5567439E5E39F86A0D273BEE
This is the Ripemd-160 I am actually getting:6c9814cf2a93131c8d3263158896e786de7a3f21
Hi I am making a simple program using python2.7 in which the first input is hex (32bytes) that will be hashed and increment by 1. The new value will be hashed again and increment again. The process will repeat until it satisfy the specified range.
However I'm getting an error with int()
TypeError: int() can't convert non-string with explicit baseBelow is my program code
from coinkit.address import Addressimport hashlibh = hashlib.new('ripemd160') # <-- Create the hasha = Address.from_secret('0000000000000000000000000000000000000000000000000000000000000001') #where the input will be hashfor i in range (0, 10): # should have 10 outputs intVal = int(a, 16) # convert to hex intVal += 1 # increment by 1 h.update(hex(intVal)) # <-- Update the hash with the new incremented integer a = Address.from_secret(h.hexdigest()) # <-- Get the digest and feed it back into from_secret print a.pub, a.priv # <-- print new 'a' valuesI did try to remove 16 it throws an error:
TypeError : int() argument must be a string or a number, not 'Address'Please enlighten me. Thank you.
everything i have tried has given me wrong output values. i even copied C codes and changed them so that they would work in python and i still get wrong outputs. what is wrong?
import os, mathdef makehex(value,size=8): value = hex(value)[2:] if value[-1] == 'L': value = value[0:-1] while len(value)<size: value = '0' + value return valuedef makebin(value,size=32): value = bin(value)[2:] while len(value)<size: value = '0' + value return valuedef ROL(value,n): return (value << n) | (value >> 32-n)def little_end(string,base = 16): t = '' if base == 2: s= 8 if base == 16: s = 2 for x in range(len(string)/s): t = string[s*x:s*(x+1)] + t return tdef F(x,y,z,round): if round<16: return x ^ y ^ z elif 16<=round<32: return (x & y) | (~x & z) elif 32<=round<48: return (x | ~y) ^ z elif 48<=round<64: return (x & z) | (y & ~z) elif 64<=round: return x ^ (y | ~z)def RIPEMD160(data):# constants h0 = 0x67452301; h1 = 0xEFCDAB89; h2 = 0x98BADCFE;h3 = 0x10325476; h4 = 0xC3D2E1F0 k = [0, 0x5A827999, 0x6ED9EBA1, 0x8F1BBCDC, 0xA953FD4E] kk = [0x50A28BE6, 0x5C4DD124, 0x6D703EF3, 0x7A6D76E9,0] s = [ 11,14,15,12,5,8,7,9,11,13,14,15,6,7,9,8, 7,6,8,13,11,9,7,15,7,12,15,9,11,7,13,12, 11,13,6,7,14,9,13,15,14,8,13,6,5,12,7,5, 11,12,14,15,14,15,9,8,9,14,5,6,8,6,5,12, 9,15,5,11,6,8,13,12,5,12,13,14,11,8,5,6] ss= [ 8,9,9,11,13,15,15,5,7,7,8,11,14,14,12,6, 9,13,15,7,12,8,9,11,7,7,12,7,6,15,13,11, 9,7,15,11,8,6,6,14,12,13,5,14,13,13,7,5, 15,5,8,11,14,14,6,14,6,9,12,9,12,5,15,8, 8,5,12,9,12,5,14,6,8,13,6,5,15,13,11,11] r= range(16) + [ 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8, 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12, 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2, 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13] rr = [ 5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12, 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2, 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13, 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14, 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11] # md4 padding + preprocessing temp = '' for x in data: temp += makebin(ord(x),8) length = len(temp)%2**64 temp +='1' while len(temp)%512!=448: temp+='0' input = temp temp = '' for x in range(len(input)/32): temp += little_end(input[32*x:32*(x+1)],2) input = temp temp = makebin(length,64) input += temp[32:]+temp[:32] t = len(input)/512 # the rounds for i in range(t): # i called the parallel round variables 2x the other round variable: a -> aa a = aa = h0; b = bb = h1; c = cc = h2; d = dd = h3; e = ee = h4 X = input[512*i:512*(i+1)] X = [int(X[32*x:32*(x+1)],2) for x in range(16)] for j in range(80): T = (a+ ROL( (F(b, c, d, j) + X[r[j]] + k[j/16])%2**32,s[j])+e)%2**32 c = ROL(c, 10) a = e; e = d; d = c; c = b; a = T T = (aa+ ROL( (F(bb,cc,dd,79-j) + X[rr[j]] + kk[j/16] )%2**32,ss[j])+ee)%2**32 cc = ROL(cc,10) aa = ee; ee = dd; dd = cc; cc = bb; aa = T T = (h1+c+dd)%2**32 h1 = (h2+d+ee)%2**32 h2 = (h3+e+aa)%2**32 h3 = (h4+a+bb)%2**32 h4 = (h0+b+cc)%2**32 h0 = T return little_end(makehex(h0))+little_end(makehex(h1))+little_end(makehex(h2))+little_end(makehex(h3))+little_end(makehex(h4)) data = RIPEMD160('') print data,data =='9c1185a5c5e9fc54612808977ee8f548b2258d31' # its always falsePlease note that by viewing our site you agree to our use of cookies (see Privacy for details). You will only see this message once.