lib/rpmlead.c

   1 /** \ingroup lead
   2  * \file lib/rpmlead.c
   3  */
   4
   5 #include "system.h"
   6
   7 #include <errno.h>
   8 #include <netinet/in.h>
   9
  10 #include <rpm/rpmlib.h>         /* rpmGetOs/ArchInfo() */
  11 #include <rpm/rpmlog.h>
  12 #include <rpm/rpmstring.h>
  13
  14 #include "lib/signature.h"
  15 #include "lib/rpmlead.h"
  16
  17 #include "debug.h"
  18
  19 static unsigned char const lead_magic[] = {
  20     RPMLEAD_MAGIC0, RPMLEAD_MAGIC1, RPMLEAD_MAGIC2, RPMLEAD_MAGIC3
  21 };
  22
  23 /** \ingroup lead
  24  * The lead data structure.
  25  * The lead needs to be 8 byte aligned.
  26  * @deprecated The lead (except for signature_type) is legacy.
  27  * @todo Don't use any information from lead.
  28  */
  29 struct rpmlead_s {
  30     unsigned char magic[4];
  31     unsigned char major;
  32     unsigned char minor;
  33     short type;
  34     short archnum;
  35     char name[66];
  36     short osnum;
  37     short signature_type;       /*!< Signature header type (RPMSIG_HEADERSIG) */
  38     char reserved[16];      /*!< Pad to 96 bytes -- 8 byte aligned! */
  39 };
  40
  41 rpmlead rpmLeadFromHeader(Header h)
  42 {
  43     rpmlead l = NULL;
  44
  45     if (h != NULL) {
  46         int archnum, osnum;
  47         char * nevr = headerGetAsString(h, RPMTAG_NEVR);
  48
  49         /* FIXME: should grab these from header instead (RhBug:717898) */
  50         rpmGetArchInfo(NULL, &archnum);
  51         rpmGetOsInfo(NULL, &osnum);
  52
  53         l = xcalloc(1, sizeof(*l));
  54         l->major = 3;
  55         l->minor = 0;
  56         l->archnum = archnum;
  57         l->osnum = osnum;
  58         l->signature_type = RPMSIGTYPE_HEADERSIG;
  59         l->type = (headerIsSource(h) ? 1 : 0);
  60
  61         memcpy(l->magic, lead_magic, sizeof(l->magic));
  62         rstrlcpy(l->name, nevr, sizeof(l->name));
  63
  64         free(nevr);
  65     }
  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     l.type = htons(lead->type);
  86     l.archnum = htons(lead->archnum);
  87     l.osnum = htons(lead->osnum);
  88     l.signature_type = htons(lead->signature_type);
  89
  90     if (Fwrite(&l, 1, sizeof(l), fd) != sizeof(l))
  91         return RPMRC_FAIL;
  92
  93     return RPMRC_OK;
  94 }
  95
  96 rpmRC rpmLeadCheck(rpmlead lead, const char **msg)
  97 {
  98     if (memcmp(lead->magic, lead_magic, sizeof(lead_magic))) {
  99         if (msg) *msg = _("not an rpm package");
 100         return RPMRC_NOTFOUND;
 101     }
 102     if (lead->signature_type != RPMSIGTYPE_HEADERSIG) {
 103         if (msg) *msg = _("illegal signature type");
 104         return RPMRC_FAIL;
 105     }
 106     if (lead->major < 3 || lead->major > 4) {
 107         if (msg) *msg = _("unsupported RPM package version");
 108         return RPMRC_FAIL;
 109     }
 110     return RPMRC_OK;
 111 }
 112
 113 rpmRC rpmLeadRead(FD_t fd, rpmlead *lead)
 114 {
 115     rpmRC rc = RPMRC_OK;
 116     rpmlead l = xcalloc(1, sizeof(*l));
 117
 118     if (Fread(l, 1, sizeof(*l), fd) != sizeof(*l)) {
 119         if (Ferror(fd)) {
 120             rpmlog(RPMLOG_ERR, _("read failed: %s (%d)\n"),
 121                         Fstrerror(fd), errno);
 122             rc = RPMRC_FAIL;
 123         } else {
 124             rpmlog(RPMLOG_ERR, _("not an rpm package\n"));
 125             rc = RPMRC_NOTFOUND;
 126         }
 127     }
 128
 129     if (rc == RPMRC_OK) {
 130         l->type = ntohs(l->type);
 131         l->archnum = ntohs(l->archnum);
 132         l->osnum = ntohs(l->osnum);
 133         l->signature_type = ntohs(l->signature_type);
 134     }
 135
 136     if (rc || lead == NULL)
 137         rpmLeadFree(l);
 138     else
 139         *lead = l;
 140
 141     return rc;
 142 }
 143
 144 int rpmLeadType(rpmlead lead)
 145 {
 146     return lead ? lead->type : -1;
 147 }