Lis\u00e4sin muutaman kytkimen newressu-satunnaislukulelun parametreihin. Kytkimill\u00e4 voi valita toisen satunnaislukul\u00e4hteen. –fast kytkimell\u00e4 valitaan nopea versio ressusta, joka ajaa ressu_genbytes_fast rutiinin kahteen kertaan. –urandom lukee satunnaisuuden \/dev\/urandom tiedostosta. –random lukee satunnaisuuden \/dev\/random tiedostosta. Oletuksena \/dev\/random:in k\u00e4ytt\u00f6 on pois p\u00e4\u00e4lt\u00e4 (USE_RANDOM). –ressu on oletustoiminta, eli k\u00e4ytet\u00e4\u00e4n uutta ressua.<\/p>\n\n\n\n
T\u00e4ll\u00e4 ensimm\u00e4isell\u00e4 readfile_xor() rutiinilla luetaan satunnaisuutta \/dev\/*random tiedostoista:<\/p>\n\n\n\n
#define aDEBUG9 2\n\nstatic void fort_readfile_xor(int len,\n unsigned char *buf,\n unsigned char *filename)\n{\n int c, n, n2;\n unsigned char temp[64];\n FILE *fp1;\n\n if((fp1 = fopen(filename, \"rb\"))\n != NULL) {\n while(len != 0) {\n n = (len < sizeof(temp)) ?\n len : sizeof(temp);\n n2=fread(temp, 1, n, fp1);\n for(c = 0; c < n2; c++)\n buf[c] ^= temp[c];\n len -= n2;\n buf += n2;\n }\n fclose(fp1);\n }\n}\n<\/code><\/pre>\n\n\n\nSeuraavaksi kokonaan uusittu ressu_genbyte(): input muuttuja m\u00e4\u00e4rittelee satunnaisuuden l\u00e4hteen, 0=ressu, 1=fast ressu, 2=urandom ja 3=random.<\/p>\n\n\n\n
int input=0;\n\n#define GENT_SIZE 4096\n#define aUSE_RANDOM 2\n\nint ressu_genbyte()\n{\n static unsigned char gent[GENT_SIZE];\n static unsigned char gent_pos=0;\n unsigned char ch;\n\n if(input==0) { \/\/ ressu\n ressu_genbytes(sizeof(ch), &ch);\n } else {\n if(gent_pos==0) {\n if(input==1) { \/\/ ressu_fast\n ressu_genbytes_fast(sizeof(gent),gent);\n ressu_genbytes_fast(sizeof(gent),gent);\n } else if(input==2) { \/\/ urandom\n readfile_xor(sizeof(gent),gent,\"\/dev\/urandom\");\n#ifdef USE_RANDOM\n } else if(input==3) { \/\/ random\n readfile_xor(sizeof(gent),gent,\"\/dev\/random\");\n#endif\n }\n }\n ch=gent[gent_pos];\n gent_pos=(gent_pos+1)%sizeof(gent);\n }\n return(ch);\n}<\/code><\/pre>\n\n\n\nSeuraavassa uudet rivit main():in parametrien k\u00e4sittelyss\u00e4: mukana pari edelt\u00e4v\u00e4\u00e4 ja pari seuraavaa rivi\u00e4:<\/p>\n\n\n\n
} else if(!strncmp(\"-i\",argv[c],2)) {\n digits=NULL;\n if(*(argv[c]+2)!='\\0') {\n digits=argv[c]+2;\n } else if(c+1 < argc) {\n digits=argv[c+1];\n c++;\n }\n if(digits==NULL || utf8len(digits)<2) {\n fprintf(stderr,\"%s: not enough digits \\\"%s\\\"\\n\",procname,argv[c]);\n help = 1;\n }\n size=1;\n } else if(!strcmp(\"--ressu\",argv[c])) {\n input=0;\n } else if(!strcmp(\"--fast\",argv[c])) {\n input=1;\n } else if(!strcmp(\"--urandom\",argv[c])) {\n input=2;\n#ifdef USE_RANDOM\n } else if(!strcmp(\"--random\",argv[c])) {\n input=3;\n#endif\n } else {\n fprintf(stderr,\"%s: invalid option %s\\n\",procname,argv[c]);\n help = 1;\n }\n<\/code><\/pre>\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"
Lis\u00e4sin muutaman kytkimen newressu-satunnaislukulelun parametreihin. Kytkimill\u00e4 voi valita toisen satunnaislukul\u00e4hteen. –fast kytkimell\u00e4 valitaan nopea versio ressusta, joka ajaa ressu_genbytes_fast rutiinin kahteen kertaan. –urandom lukee satunnaisuuden \/dev\/urandom tiedostosta. –random lukee satunnaisuuden \/dev\/random tiedostosta. Oletuksena \/dev\/random:in k\u00e4ytt\u00f6 on pois p\u00e4\u00e4lt\u00e4 (USE_RANDOM). –ressu on oletustoiminta, eli k\u00e4ytet\u00e4\u00e4n uutta ressua. T\u00e4ll\u00e4 ensimm\u00e4isell\u00e4 readfile_xor() rutiinilla luetaan satunnaisuutta \/dev\/*random tiedostoista: Seuraavaksi… Continue reading Ressu 2.0 Vaihtoehtoiset satunnaisuusl\u00e4hteet<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[6,11],"tags":[],"_links":{"self":[{"href":"https:\/\/moijari.com\/index.php?rest_route=\/wp\/v2\/posts\/1656"}],"collection":[{"href":"https:\/\/moijari.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/moijari.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/moijari.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/moijari.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1656"}],"version-history":[{"count":4,"href":"https:\/\/moijari.com\/index.php?rest_route=\/wp\/v2\/posts\/1656\/revisions"}],"predecessor-version":[{"id":1673,"href":"https:\/\/moijari.com\/index.php?rest_route=\/wp\/v2\/posts\/1656\/revisions\/1673"}],"wp:attachment":[{"href":"https:\/\/moijari.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1656"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/moijari.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1656"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/moijari.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1656"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}