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Annotation of researchv10no/ipc/mgrs/oauthmgr/test.c, revision 1.1

1.1     ! root        1: #include <stdio.h>
        !             2: 
        !             3: /*
        !             4:  * security - an authentication server
        !             5:  *
        !             6:  * For a given user, this locates that user's key in the
        !             7:  * key database, challenges the user to encrypt some data,
        !             8:  * and compares that user's result with the result of
        !             9:  * encrypting the data with the user's real key.  If the
        !            10:  * results are the same, the user is authenticated, otherwise,
        !            11:  * no.
        !            12:  */
        !            13: main()
        !            14: {
        !            15:        int k[8], i, j;
        !            16:        char s[30], c[30], b[64];
        !            17:        unsigned l, r;
        !            18: 
        !            19:        puts("key: 8 groups of three octal digits");
        !            20:        puts("data: a decimal integer, up to 8 digits");
        !            21:        puts("");
        !            22:        fputs("key: ", stdout);
        !            23: 
        !            24:        scanf("%o %o %o %o %o %o %o %o", &k[0], &k[1], &k[2], &k[3],
        !            25:           &k[4], &k[5], &k[6], &k[7]);
        !            26:        gets(s);
        !            27:        for(i=0; i<8; i++)
        !            28:           for(j=0; j<8; j++)
        !            29:              b[8*i+j] = (k[i]>>(7-j))&1;
        !            30:        setkey(b);
        !            31:        while(1){
        !            32:           fputs("data: ", stdout);
        !            33:           for(i=0; i<8; i++) s[i] = 0;
        !            34:           gets(s);
        !            35:           for(i=0; i<8; i++)
        !            36:              for(j=0; j<8; j++)
        !            37:                 b[8*i+j] = (s[i]>>(7-j))&1;
        !            38:           encrypt(b, 0);
        !            39:           for(i=0; i<32; i++){
        !            40:              l = (l<<1) | b[i];
        !            41:              r = (r<<1) | b[i+32];
        !            42:           }
        !            43:           printf("%.8x  %.8x\n", l, r);
        !            44:        }
        !            45: }
        !            46: 

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