ref: dff1e3813fb0deb18ca790b7c28f6a1405720ff6
dir: /sys/src/libsec/port/thumb.c/
#include "os.h" #include <bio.h> #include <libsec.h> enum{ ThumbTab = 1<<10 }; static Thumbprint* tablehead(uchar *sum, Thumbprint *table) { return &table[((sum[0]<<8) + sum[1]) & (ThumbTab-1)]; } void freeThumbprints(Thumbprint *table) { Thumbprint *hd, *p, *q; if(table == nil) return; for(hd = table; hd < table+ThumbTab; hd++){ for(p = hd->next; p && p != hd; p = q){ q = p->next; free(p); } } free(table); } int okThumbprint(uchar *sum, Thumbprint *table) { Thumbprint *hd, *p; if(table == nil) return 0; hd = tablehead(sum, table); for(p = hd->next; p; p = p->next){ if(memcmp(sum, p->sha1, SHA1dlen) == 0) return 1; if(p == hd) break; } return 0; } static int loadThumbprints(char *file, Thumbprint *table, Thumbprint *crltab) { Thumbprint *hd, *entry; char *line, *field[50]; uchar sum[SHA1dlen]; Biobuf *bin; if(access(file, AEXIST) < 0) return 0; /* not an error */ if((bin = Bopen(file, OREAD)) == nil) return -1; for(; (line = Brdstr(bin, '\n', 1)) != nil; free(line)){ if(tokenize(line, field, nelem(field)) < 2) continue; if(strcmp(field[0], "#include") == 0){ if(loadThumbprints(field[1], table, crltab) < 0) goto err; continue; } if(strcmp(field[0], "x509") != 0 || strncmp(field[1], "sha1=", 5) != 0) continue; field[1] += 5; if(dec16(sum, SHA1dlen, field[1], strlen(field[1])) != SHA1dlen){ werrstr("malformed x509 entry in %s: %s", file, field[1]); goto err; } if(crltab && okThumbprint(sum, crltab)) continue; hd = tablehead(sum, table); if(hd->next == nil) entry = hd; else { if((entry = malloc(sizeof(*entry))) == nil) goto err; entry->next = hd->next; } hd->next = entry; memcpy(entry->sha1, sum, SHA1dlen); } Bterm(bin); return 0; err: free(line); Bterm(bin); return -1; } Thumbprint * initThumbprints(char *ok, char *crl) { Thumbprint *table, *crltab; table = crltab = nil; if(crl){ if((crltab = malloc(ThumbTab * sizeof(*crltab))) == nil) goto err; memset(crltab, 0, ThumbTab * sizeof(*crltab)); if(loadThumbprints(crl, crltab, nil) < 0) goto err; } if((table = malloc(ThumbTab * sizeof(*table))) == nil) goto err; memset(table, 0, ThumbTab * sizeof(*table)); if(loadThumbprints(ok, table, crltab) < 0){ freeThumbprints(table); table = nil; } err: freeThumbprints(crltab); return table; }