10 #define SCRYPT_BUFFER_SIZE (131072 + 63)
12 extern "C" void scrypt_core(unsigned int *X, unsigned int *V);
14 /* cpu and memory intensive function to transform a 80 byte buffer into a 32 byte output
15 scratchpad size needs to be at least 63 + (128 * r * p) + (256 * r + 64) + (128 * r * N) bytes
16 r = 1, p = 1, N = 1024
19 uint256 scrypt_nosalt(const void* input, size_t inputlen, void *scratchpad)
24 V = (unsigned int *)(((uintptr_t)(scratchpad) + 63) & ~ (uintptr_t)(63));
26 PBKDF2_SHA256((const uint8_t*)input, inputlen, (const uint8_t*)input, inputlen, 1, (uint8_t *)X, 128);
28 PBKDF2_SHA256((const uint8_t*)input, inputlen, (uint8_t *)X, 128, 1, (uint8_t*)&result, 32);
33 uint256 scrypt(const void* data, size_t datalen, const void* salt, size_t saltlen, void *scratchpad)
38 V = (unsigned int *)(((uintptr_t)(scratchpad) + 63) & ~ (uintptr_t)(63));
40 PBKDF2_SHA256((const uint8_t*)data, datalen, (const uint8_t*)salt, saltlen, 1, (uint8_t *)X, 128);
42 PBKDF2_SHA256((const uint8_t*)data, datalen, (uint8_t *)X, 128, 1, (uint8_t*)&result, 32);
47 uint256 scrypt_hash(const void* input, size_t inputlen)
49 unsigned char scratchpad[SCRYPT_BUFFER_SIZE];
50 return scrypt_nosalt(input, inputlen, scratchpad);
53 uint256 scrypt_salted_hash(const void* input, size_t inputlen, const void* salt, size_t saltlen)
55 unsigned char scratchpad[SCRYPT_BUFFER_SIZE];
56 return scrypt(input, inputlen, salt, saltlen, scratchpad);
59 uint256 scrypt_salted_multiround_hash(const void* input, size_t inputlen, const void* salt, size_t saltlen, const unsigned int nRounds)
61 uint256 resultHash = scrypt_salted_hash(input, inputlen, salt, saltlen);
62 uint256 transitionalHash = resultHash;
64 for(unsigned int i = 1; i < nRounds; i++)
66 resultHash = scrypt_salted_hash(input, inputlen, (const void*)&transitionalHash, 32);
67 transitionalHash = resultHash;
73 uint256 scrypt_blockhash(const void* input)
75 unsigned char scratchpad[SCRYPT_BUFFER_SIZE];
76 return scrypt_nosalt(input, 80, scratchpad);