lib/rpmlead.c

   1 /** \ingroup lead
   2  * \file lib/rpmlead.c
   3  */
   4
   5 #include "system.h"
   6
   7 #include <netinet/in.h>
   8
   9 #include <rpm/rpmlib.h>         /* rpmGetOs/ArchInfo() */
  10 #include <rpm/rpmlog.h>
  11
  12 #include "lib/signature.h"
  13 #include "lib/rpmlead.h"
  14 #include "lib/legacy.h"
  15
  16 #include "debug.h"
  17
  18 static unsigned char lead_magic[] = {
  19     RPMLEAD_MAGIC0, RPMLEAD_MAGIC1, RPMLEAD_MAGIC2, RPMLEAD_MAGIC3
  20 };
  21
  22 /** \ingroup lead
  23  * The lead data structure.
  24  * The lead needs to be 8 byte aligned.
  25  * @deprecated The lead (except for signature_type) is legacy.
  26  * @todo Don't use any information from lead.
  27  */
  28 struct rpmlead_s {
  29     unsigned char magic[4];
  30     unsigned char major;
  31     unsigned char minor;
  32     short type;
  33     short archnum;
  34     char name[66];
  35     short osnum;
  36     short signature_type;       /*!< Signature header type (RPMSIG_HEADERSIG) */
  37     char reserved[16];      /*!< Pad to 96 bytes -- 8 byte aligned! */
  38 };
  39
  40 rpmlead rpmLeadNew(void)
  41 {
  42     int archnum, osnum;
  43     rpmlead l = calloc(1, sizeof(*l));
  44
  45     rpmGetArchInfo(NULL, &archnum);
  46     rpmGetOsInfo(NULL, &osnum);
  47
  48     l->major = (_noDirTokens ? 4: 3);
  49     l->minor = 0;
  50     l->archnum = archnum;
  51     l->osnum = osnum;
  52     l->signature_type = RPMSIGTYPE_HEADERSIG;
  53     return l;
  54 }
  55
  56 rpmlead rpmLeadFromHeader(Header h)
  57 {
  58     char * nevr;
  59     assert(h != NULL);
  60     rpmlead l = rpmLeadNew();
  61
  62     l->type = (headerIsSource(h) ? 1 : 0);
  63     nevr = headerGetNEVR(h, NULL);
  64     strncpy(l->name, nevr, sizeof(l->name));
  65     free(nevr);
  66
  67     return l;
  68 }
  69
  70 rpmlead rpmLeadFree(rpmlead lead)
  71 {
  72     assert(lead != NULL);
  73     free(lead);
  74     return NULL;
  75 }
  76
  77 /* The lead needs to be 8 byte aligned */
  78 rpmRC rpmLeadWrite(FD_t fd, rpmlead lead)
  79 {
  80     struct rpmlead_s l;
  81     assert(lead != NULL);
  82
  83     memcpy(&l, lead, sizeof(l));
  84
  85     memcpy(&l.magic, lead_magic, sizeof(l.magic));
  86     l.type = htons(lead->type);
  87     l.archnum = htons(lead->archnum);
  88     l.osnum = htons(lead->osnum);
  89     l.signature_type = htons(lead->signature_type);
  90
  91     if (Fwrite(&l, 1, sizeof(l), fd) != sizeof(l))
  92         return RPMRC_FAIL;
  93
  94     return RPMRC_OK;
  95 }
  96
  97 rpmRC rpmLeadCheck(rpmlead lead, const char* fn)
  98 {
  99     if (memcmp(lead->magic, lead_magic, sizeof(lead_magic))) {
 100         rpmlog(RPMLOG_ERR, _("%s: not an rpm package\n"), fn);
 101         return RPMRC_NOTFOUND;
 102     }
 103     if (lead->signature_type != RPMSIGTYPE_HEADERSIG) {
 104         rpmlog(RPMLOG_ERR, _("%s: illegal signature type\n"), fn);
 105         return RPMRC_FAIL;
 106     }
 107     if (lead->major < 3 || lead->major > 4) {
 108         rpmlog(RPMLOG_ERR, _("%s: unsupported RPM package (version %d)\n"), fn, lead->major);
 109         return RPMRC_FAIL;
 110     }
 111     return RPMRC_OK;
 112 }
 113
 114 rpmRC rpmLeadRead(FD_t fd, rpmlead lead)
 115 {
 116     assert(lead != NULL);
 117     memset(lead, 0, sizeof(*lead));
 118     /* FIX: remove timed read */
 119     if (timedRead(fd, (char *)lead, sizeof(*lead)) != sizeof(*lead)) {
 120         if (Ferror(fd)) {
 121             rpmlog(RPMLOG_ERR, _("read failed: %s (%d)\n"),
 122                         Fstrerror(fd), errno);
 123             return RPMRC_FAIL;
 124         }
 125         return RPMRC_NOTFOUND;
 126     }
 127     lead->type = ntohs(lead->type);
 128     lead->archnum = ntohs(lead->archnum);
 129     lead->osnum = ntohs(lead->osnum);
 130     lead->signature_type = ntohs(lead->signature_type);
 131
 132     return RPMRC_OK;
 133 }