RosettaCodeData/Task/SHA-1/BBC-BASIC/sha-1-1.basic

22 lines
750 B
Plaintext

PRINT FNsha1("Rosetta Code")
END
DEF FNsha1(message$)
LOCAL buflen%, buffer%, hprov%, hhash%, hash$, i%
CALG_SHA1 = &8004
CRYPT_VERIFYCONTEXT = &F0000000
HP_HASHVAL = 2
PROV_RSA_FULL = 1
buflen% = 64
DIM buffer% LOCAL buflen%-1
SYS "CryptAcquireContext", ^hprov%, 0, 0, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT
SYS "CryptCreateHash", hprov%, CALG_SHA1, 0, 0, ^hhash%
SYS "CryptHashData", hhash%, message$, LEN(message$), 0
SYS "CryptGetHashParam", hhash%, HP_HASHVAL, buffer%, ^buflen%, 0
SYS "CryptDestroyHash", hhash%
SYS "CryptReleaseContext", hprov%
FOR i% = 0 TO buflen%-1
hash$ += RIGHT$("0" + STR$~buffer%?i%, 2)
NEXT
= hash$