static void MGF1()

in src/rsa_support.c [117:134]

• 16 lines of code
• 3 McCabe index (conditional complexity)

static void MGF1(int sha,const octet *z,int olen,octet *mask)
{
    char h[64];
    octet H= {0,sizeof(h),h};
    int hlen=sha;
    int cthreshold;

    OCT_empty(mask);

    cthreshold=ROUNDUP(olen,hlen);
    for (int counter=0; counter<cthreshold; counter++)
    {
        hashit(sha,z,counter,&H);
        if (mask->len+hlen>olen) OCT_jbytes(mask,H.val,olen%hlen);
        else                     OCT_joctet(mask,&H);
    }
    OCT_clear(&H);
}