141 lines
3.2 KiB
C
141 lines
3.2 KiB
C
/** \ingroup lead
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* \file lib/rpmlead.c
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*/
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#include "system.h"
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#include <errno.h>
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#include <netinet/in.h>
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#include <rpm/rpmlib.h> /* rpmGetOs/ArchInfo() */
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#include <rpm/rpmlog.h>
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#include <rpm/rpmstring.h>
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#include "lib/signature.h"
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#include "lib/header_internal.h" /* Freadall() */
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#include "lib/rpmlead.h"
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#include "debug.h"
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/* A long time ago in a galaxy far far away, signatures were not in a header */
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#define RPMSIGTYPE_HEADERSIG 5
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static unsigned char const lead_magic[] = {
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RPMLEAD_MAGIC0, RPMLEAD_MAGIC1, RPMLEAD_MAGIC2, RPMLEAD_MAGIC3
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};
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/** \ingroup lead
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* The lead data structure.
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* The lead needs to be 8 byte aligned.
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* @deprecated The lead (except for signature_type) is legacy.
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* @todo Don't use any information from lead.
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*/
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struct rpmlead_s {
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unsigned char magic[4];
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unsigned char major;
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unsigned char minor;
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short type;
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short archnum;
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char name[66];
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short osnum;
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short signature_type; /*!< Signature header type (RPMSIG_HEADERSIG) */
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char reserved[16]; /*!< Pad to 96 bytes -- 8 byte aligned! */
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};
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static int rpmLeadFromHeader(Header h, struct rpmlead_s *l)
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{
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if (h != NULL) {
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int archnum, osnum;
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char * nevr = headerGetAsString(h, RPMTAG_NEVR);
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/* FIXME: should grab these from header instead (RhBug:717898) */
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rpmGetArchInfo(NULL, &archnum);
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rpmGetOsInfo(NULL, &osnum);
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memset(l, 0, sizeof(*l));
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l->major = 3;
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l->minor = 0;
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l->archnum = archnum;
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l->osnum = osnum;
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l->signature_type = RPMSIGTYPE_HEADERSIG;
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l->type = (headerIsSource(h) ? 1 : 0);
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memcpy(l->magic, lead_magic, sizeof(l->magic));
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rstrlcpy(l->name, nevr, sizeof(l->name));
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free(nevr);
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}
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return (h != NULL);
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}
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/* The lead needs to be 8 byte aligned */
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rpmRC rpmLeadWrite(FD_t fd, Header h)
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{
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rpmRC rc = RPMRC_FAIL;
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struct rpmlead_s l;
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if (rpmLeadFromHeader(h, &l)) {
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l.type = htons(l.type);
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l.archnum = htons(l.archnum);
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l.osnum = htons(l.osnum);
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l.signature_type = htons(l.signature_type);
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if (Fwrite(&l, 1, sizeof(l), fd) == sizeof(l))
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rc = RPMRC_OK;
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}
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return rc;
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}
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static rpmRC rpmLeadCheck(struct rpmlead_s *lead, char **msg)
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{
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if (memcmp(lead->magic, lead_magic, sizeof(lead_magic))) {
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*msg = xstrdup(_("not an rpm package"));
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return RPMRC_NOTFOUND;
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}
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if (lead->signature_type != RPMSIGTYPE_HEADERSIG) {
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*msg = xstrdup(_("illegal signature type"));
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return RPMRC_FAIL;
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}
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if (lead->major < 3 || lead->major > 4) {
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*msg = xstrdup(_("unsupported RPM package version"));
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return RPMRC_FAIL;
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}
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return RPMRC_OK;
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}
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rpmRC rpmLeadRead(FD_t fd, char **emsg)
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{
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rpmRC rc = RPMRC_OK;
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struct rpmlead_s l;
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char *err = NULL;
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memset(&l, 0, sizeof(l));
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if (Freadall(fd, &l, sizeof(l)) != sizeof(l)) {
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if (Ferror(fd)) {
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rasprintf(&err, _("read failed: %s (%d)\n"), Fstrerror(fd), errno);
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rc = RPMRC_FAIL;
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} else {
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err = xstrdup(_("not an rpm package\n"));
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rc = RPMRC_NOTFOUND;
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}
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} else {
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l.type = ntohs(l.type);
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l.archnum = ntohs(l.archnum);
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l.osnum = ntohs(l.osnum);
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l.signature_type = ntohs(l.signature_type);
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rc = rpmLeadCheck(&l, &err);
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}
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if (rc != RPMRC_OK) {
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if (emsg != NULL)
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*emsg = err;
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else
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free(err);
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}
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return rc;
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}
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