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https://github.com/moparisthebest/wget
synced 2024-07-03 16:38:41 -04:00
Support at most one file signature. Adapt comments to libmetalink 0.13.
* src/metalink.c (retrieve_from_metalink): Add comment about new libmetalink version. Do not iterate over signatures - support just one.
This commit is contained in:
Hubert Tarasiuk
Giuseppe Scrivano
parent
225a87d4a2
commit
97389a7497
213
src/metalink.c
213
src/metalink.c
@ -224,15 +224,21 @@ retrieve_from_metalink (const metalink_t* metalink)
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sig_status = 0; /* Not verified. */
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#ifdef HAVE_GPGME
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/* Check the crypto signature. */
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/* Check the crypto signature.
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Note that the signtures from Metalink in XML will not be
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parsed when using libmetalink version older than 0.1.3.
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Metalink-over-HTTP is not affected by this problem. */
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if (mfile->signature)
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{
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metalink_signature_t *msig;
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metalink_signature_t *msig = mfile->signature;
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gpgme_error_t gpgerr;
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gpgme_ctx_t gpgctx;
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gpgme_data_t gpgsigdata, gpgdata;
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gpgme_verify_result_t gpgres;
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int fd;
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gpgme_signature_t gpgsig;
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gpgme_protocol_t gpgprot = GPGME_PROTOCOL_UNKNOWN;
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int fd = -1;
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/* Initialize the library - as name suggests. */
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gpgme_check_version (NULL);
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@ -254,7 +260,7 @@ retrieve_from_metalink (const metalink_t* metalink)
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logprintf (LOG_NOTQUIET,
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"GPGME data_new_from_fd: %s\n",
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gpgme_strerror (gpgerr));
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goto gpg_cleanup_fd;
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goto gpg_skip_verification;
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}
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/* Prepare new GPGME context. */
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@ -264,127 +270,122 @@ retrieve_from_metalink (const metalink_t* metalink)
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logprintf (LOG_NOTQUIET,
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"GPGME new: %s\n",
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gpgme_strerror (gpgerr));
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goto gpg_cleanup_data;
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gpgme_data_release (gpgdata);
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goto gpg_skip_verification;
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}
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/* Note that this will only work for Metalink-over-HTTP
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requests (that we parse manually) due to a bug in
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Libmetalink. Another problem with Libmetalink is that
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it supports at most one signature per file. The below
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line should be modified after Libmetalink resolves these
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issues. */
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for (msig = mfile->signature; msig == mfile->signature; msig++)
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DEBUGP (("Veryfying signature %s:\n%s\n",
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quote (msig->mediatype),
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msig->signature));
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/* Check signature type. */
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if (!strcmp (msig->mediatype, "application/pgp-signature"))
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gpgprot = GPGME_PROTOCOL_OpenPGP;
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else /* Unsupported signature type. */
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{
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gpgme_signature_t gpgsig;
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gpgme_protocol_t gpgprot = GPGME_PROTOCOL_UNKNOWN;
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gpgme_release (gpgctx);
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gpgme_data_release (gpgdata);
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goto gpg_skip_verification;
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}
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DEBUGP (("Veryfying signature %s:\n%s\n",
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quote (msig->mediatype),
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msig->signature));
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gpgerr = gpgme_set_protocol (gpgctx, gpgprot);
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if (gpgerr != GPG_ERR_NO_ERROR)
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{
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logprintf (LOG_NOTQUIET,
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"GPGME set_protocol: %s\n",
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gpgme_strerror (gpgerr));
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gpgme_release (gpgctx);
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gpgme_data_release (gpgdata);
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goto gpg_skip_verification;
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}
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/* Check signature type. */
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if (!strcmp (msig->mediatype, "application/pgp-signature"))
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gpgprot = GPGME_PROTOCOL_OpenPGP;
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else /* Unsupported signature type. */
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continue;
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/* Load the signature. */
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gpgerr = gpgme_data_new_from_mem (&gpgsigdata,
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msig->signature,
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strlen (msig->signature),
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0);
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if (gpgerr != GPG_ERR_NO_ERROR)
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{
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logprintf (LOG_NOTQUIET,
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_("GPGME data_new_from_mem: %s\n"),
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gpgme_strerror (gpgerr));
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gpgme_release (gpgctx);
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gpgme_data_release (gpgdata);
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goto gpg_skip_verification;
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}
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gpgerr = gpgme_set_protocol (gpgctx, gpgprot);
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if (gpgerr != GPG_ERR_NO_ERROR)
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/* Verify the signature. */
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gpgerr = gpgme_op_verify (gpgctx, gpgsigdata, gpgdata, NULL);
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if (gpgerr != GPG_ERR_NO_ERROR)
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{
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logprintf (LOG_NOTQUIET,
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_("GPGME op_verify: %s\n"),
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gpgme_strerror (gpgerr));
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gpgme_data_release (gpgsigdata);
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gpgme_release (gpgctx);
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gpgme_data_release (gpgdata);
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goto gpg_skip_verification;
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}
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/* Check the results. */
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gpgres = gpgme_op_verify_result (gpgctx);
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if (!gpgres)
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{
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logputs (LOG_NOTQUIET,
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_("GPGME op_verify_result: NULL\n"));
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gpgme_data_release (gpgsigdata);
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gpgme_release (gpgctx);
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gpgme_data_release (gpgdata);
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goto gpg_skip_verification;
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}
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/* The list is null-terminated. */
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for (gpgsig = gpgres->signatures; gpgsig; gpgsig = gpgsig->next)
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{
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DEBUGP (("Checking signature 0x%p\n",
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(void *) gpgsig));
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DEBUGP (("Summary=0x%x Status=0x%x\n",
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gpgsig->summary, gpgsig->status & 0xFFFF));
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if (gpgsig->summary
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& (GPGME_SIGSUM_VALID | GPGME_SIGSUM_GREEN))
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{
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logprintf (LOG_NOTQUIET,
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"GPGME set_protocol: %s\n",
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gpgme_strerror (gpgerr));
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continue;
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logputs (LOG_VERBOSE,
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_("Signature validation suceeded.\n"));
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sig_status = 1;
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break;
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}
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/* Load the signature. */
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gpgerr = gpgme_data_new_from_mem (&gpgsigdata,
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msig->signature,
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strlen (msig->signature),
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0);
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if (gpgerr != GPG_ERR_NO_ERROR)
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{
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logprintf (LOG_NOTQUIET,
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_("GPGME data_new_from_mem: %s\n"),
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gpgme_strerror (gpgerr));
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continue;
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}
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/* Verify the signature. */
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gpgerr = gpgme_op_verify (gpgctx, gpgsigdata, gpgdata, NULL);
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if (gpgerr != GPG_ERR_NO_ERROR)
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{
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logprintf (LOG_NOTQUIET,
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_("GPGME op_verify: %s\n"),
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gpgme_strerror (gpgerr));
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gpgme_data_release (gpgsigdata);
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continue;
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}
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/* Check the results. */
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gpgres = gpgme_op_verify_result (gpgctx);
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if (!gpgres)
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if (gpgsig->summary & GPGME_SIGSUM_RED)
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{
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logputs (LOG_NOTQUIET,
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_("GPGME op_verify_result: NULL\n"));
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gpgme_data_release (gpgsigdata);
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continue;
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_("Invalid signature. Rejecting resource.\n"));
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sig_status = -1;
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break;
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}
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/* The list is null-terminated. */
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for (gpgsig = gpgres->signatures; gpgsig; gpgsig = gpgsig->next)
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if (gpgsig->summary == 0
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&& (gpgsig->status & 0xFFFF) == GPG_ERR_NO_ERROR)
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{
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DEBUGP (("Checking signature 0x%p\n",
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(void *) gpgsig));
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DEBUGP (("Summary=0x%x Status=0x%x\n",
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gpgsig->summary, gpgsig->status & 0xFFFF));
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if (gpgsig->summary
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& (GPGME_SIGSUM_VALID | GPGME_SIGSUM_GREEN))
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{
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logputs (LOG_VERBOSE,
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_("Signature validation suceeded.\n"));
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sig_status = 1;
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break;
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}
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if (gpgsig->summary & GPGME_SIGSUM_RED)
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{
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logputs (LOG_NOTQUIET,
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_("Invalid signature. Rejecting resource.\n"));
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sig_status = -1;
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break;
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}
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if (gpgsig->summary == 0
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&& (gpgsig->status & 0xFFFF) == GPG_ERR_NO_ERROR)
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{
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logputs (LOG_VERBOSE,
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_("Data matches signature, but signature "
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"is not trusted.\n"));
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}
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if ((gpgsig->status & 0xFFFF) != GPG_ERR_NO_ERROR)
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{
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logprintf (LOG_NOTQUIET,
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"GPGME: %s\n",
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gpgme_strerror (gpgsig->status & 0xFFFF));
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}
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logputs (LOG_VERBOSE,
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_("Data matches signature, but signature "
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"is not trusted.\n"));
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}
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gpgme_data_release (gpgsigdata);
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if (sig_status != 0)
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break;
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} /* Iterate over signatures. */
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if ((gpgsig->status & 0xFFFF) != GPG_ERR_NO_ERROR)
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{
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logprintf (LOG_NOTQUIET,
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"GPGME: %s\n",
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gpgme_strerror (gpgsig->status & 0xFFFF));
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}
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}
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gpgme_data_release (gpgsigdata);
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gpgme_release (gpgctx);
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gpg_cleanup_data:
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gpgme_data_release (gpgdata);
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gpg_cleanup_fd:
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close (fd);
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} /* endif (mfile->signature) */
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gpg_skip_verification:
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if (fd != -1)
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close (fd);
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} /* endif (mfile->signature) */
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#endif
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/* Stop if file was downloaded with success. */
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if (sig_status >= 0)
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