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-rw-r--r--src/pki/commands/signcrl.c382
1 files changed, 382 insertions, 0 deletions
diff --git a/src/pki/commands/signcrl.c b/src/pki/commands/signcrl.c
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+++ b/src/pki/commands/signcrl.c
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+/*
+ * Copyright (C) 2010 Martin Willi
+ * Copyright (C) 2010 revosec AG
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include <time.h>
+
+#include "pki.h"
+
+#include <debug.h>
+#include <utils/linked_list.h>
+#include <credentials/certificates/certificate.h>
+#include <credentials/certificates/x509.h>
+#include <credentials/certificates/crl.h>
+
+
+/**
+ * Entry for a revoked certificate
+ */
+typedef struct {
+ chunk_t serial;
+ crl_reason_t reason;
+ time_t date;
+} revoked_t;
+
+/**
+ * Add a revocation to the list
+ */
+static void add_revoked(linked_list_t *list,
+ chunk_t serial, crl_reason_t reason, time_t date)
+{
+ revoked_t *revoked;
+
+ INIT(revoked,
+ .serial = chunk_clone(serial),
+ .reason = reason,
+ .date = date,
+ );
+ list->insert_last(list, revoked);
+}
+
+/**
+ * Destroy a reason entry
+ */
+static void revoked_destroy(revoked_t *revoked)
+{
+ free(revoked->serial.ptr);
+ free(revoked);
+}
+
+/**
+ * Filter for revoked enumerator
+ */
+static bool filter(void *data, revoked_t **revoked, chunk_t *serial, void *p2,
+ time_t *date, void *p3, crl_reason_t *reason)
+{
+ *serial = (*revoked)->serial;
+ *date = (*revoked)->date;
+ *reason = (*revoked)->reason;
+ return TRUE;
+}
+
+/**
+ * Extract the serial of a certificate, write it into buf
+ */
+static int read_serial(char *file, char *buf, int buflen)
+{
+ certificate_t *cert;
+ x509_t *x509;
+ chunk_t serial;
+
+ x509 = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
+ BUILD_FROM_FILE, file, BUILD_END);
+ cert = &x509->interface;
+ if (!cert)
+ {
+ return -1;
+ }
+ serial = x509->get_serial(x509);
+ if (serial.len == 0 || serial.len > buflen)
+ {
+ cert->destroy(cert);
+ return -2;
+ }
+ memcpy(buf, serial.ptr, serial.len);
+ cert->destroy(cert);
+ return serial.len;
+}
+
+/**
+ * Sign a CRL
+ */
+static int sign_crl()
+{
+ cred_encoding_type_t form = CERT_ASN1_DER;
+ private_key_t *private = NULL;
+ public_key_t *public = NULL;
+ certificate_t *ca = NULL, *crl = NULL;
+ crl_t *lastcrl = NULL;
+ x509_t *x509;
+ hash_algorithm_t digest = HASH_SHA1;
+ char *arg, *cacert = NULL, *cakey = NULL, *lastupdate = NULL, *error = NULL;
+ char serial[512], crl_serial[8];
+ int serial_len = 0;
+ crl_reason_t reason = CRL_REASON_UNSPECIFIED;
+ time_t thisUpdate, nextUpdate, date = time(NULL);
+ int lifetime = 15;
+ linked_list_t *list;
+ enumerator_t *enumerator, *lastenum = NULL;
+ chunk_t encoding = chunk_empty;
+
+ list = linked_list_create();
+
+ memset(crl_serial, 0, sizeof(crl_serial));
+
+ while (TRUE)
+ {
+ switch (command_getopt(&arg))
+ {
+ case 'h':
+ goto usage;
+ case 'g':
+ digest = get_digest(arg);
+ if (digest == HASH_UNKNOWN)
+ {
+ error = "invalid --digest type";
+ goto usage;
+ }
+ continue;
+ case 'c':
+ cacert = arg;
+ continue;
+ case 'k':
+ cakey = arg;
+ continue;
+ case 'a':
+ lastupdate = arg;
+ continue;
+ case 'l':
+ lifetime = atoi(arg);
+ if (!lifetime)
+ {
+ error = "invalid lifetime";
+ goto usage;
+ }
+ continue;
+ case 'z':
+ serial_len = read_serial(arg, serial, sizeof(serial));
+ if (serial_len < 0)
+ {
+ snprintf(serial, sizeof(serial),
+ "parsing certificate '%s' failed", arg);
+ error = serial;
+ goto error;
+ }
+ add_revoked(list, chunk_create(serial, serial_len), reason, date);
+ date = time(NULL);
+ serial_len = 0;
+ reason = CRL_REASON_UNSPECIFIED;
+ continue;
+ case 's':
+ {
+ chunk_t chunk;
+ int hex_len;
+
+ hex_len = strlen(arg);
+ if ((hex_len / 2) + (hex_len % 2) > sizeof(serial))
+ {
+ error = "invalid serial";
+ goto usage;
+ }
+ chunk = chunk_from_hex(chunk_create(arg, hex_len), serial);
+ serial_len = chunk.len;
+ add_revoked(list, chunk_create(serial, serial_len), reason, date);
+ date = time(NULL);
+ serial_len = 0;
+ reason = CRL_REASON_UNSPECIFIED;
+ continue;
+ }
+ case 'r':
+ if (streq(arg, "key-compromise"))
+ {
+ reason = CRL_REASON_KEY_COMPROMISE;
+ }
+ else if (streq(arg, "ca-compromise"))
+ {
+ reason = CRL_REASON_CA_COMPROMISE;
+ }
+ else if (streq(arg, "affiliation-changed"))
+ {
+ reason = CRL_REASON_AFFILIATION_CHANGED;
+ }
+ else if (streq(arg, "superseded"))
+ {
+ reason = CRL_REASON_SUPERSEDED;
+ }
+ else if (streq(arg, "cessation-of-operation"))
+ {
+ reason = CRL_REASON_CESSATION_OF_OPERATON;
+ }
+ else if (streq(arg, "certificate-hold"))
+ {
+ reason = CRL_REASON_CERTIFICATE_HOLD;
+ }
+ else
+ {
+ return command_usage( "invalid revocation reason");
+ }
+ continue;
+ case 'd':
+ date = atol(arg);
+ if (!date)
+ {
+ error = "invalid date";
+ goto usage;
+ }
+ continue;
+ case 'f':
+ if (!get_form(arg, &form, CRED_CERTIFICATE))
+ {
+ return command_usage("invalid output format");
+ }
+ continue;
+ case EOF:
+ break;
+ default:
+ error = "invalid --signcrl option";
+ goto usage;
+ }
+ break;
+ }
+
+ if (!cacert)
+ {
+ error = "--cacert is required";
+ goto usage;
+ }
+ if (!cakey)
+ {
+ error = "--cakey is required";
+ goto usage;
+ }
+
+ ca = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
+ BUILD_FROM_FILE, cacert, BUILD_END);
+ if (!ca)
+ {
+ error = "parsing CA certificate failed";
+ goto error;
+ }
+ x509 = (x509_t*)ca;
+ if (!(x509->get_flags(x509) & X509_CA))
+ {
+ error = "CA certificate misses CA basicConstraint";
+ goto error;
+ }
+ public = ca->get_public_key(ca);
+ if (!public)
+ {
+ error = "extracting CA certificate public key failed";
+ goto error;
+ }
+ private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY,
+ public->get_type(public),
+ BUILD_FROM_FILE, cakey, BUILD_END);
+ if (!private)
+ {
+ error = "parsing CA private key failed";
+ goto error;
+ }
+ if (!private->belongs_to(private, public))
+ {
+ error = "CA private key does not match CA certificate";
+ goto error;
+ }
+
+ thisUpdate = time(NULL);
+ nextUpdate = thisUpdate + lifetime * 24 * 60 * 60;
+
+ if (lastupdate)
+ {
+ lastcrl = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509_CRL,
+ BUILD_FROM_FILE, lastupdate, BUILD_END);
+ if (!lastcrl)
+ {
+ error = "loading lastUpdate CRL failed";
+ goto error;
+ }
+ memcpy(crl_serial, lastcrl->get_serial(lastcrl).ptr,
+ min(lastcrl->get_serial(lastcrl).len, sizeof(crl_serial)));
+ lastenum = lastcrl->create_enumerator(lastcrl);
+ }
+
+ chunk_increment(chunk_create(crl_serial, sizeof(crl_serial)));
+
+ enumerator = enumerator_create_filter(list->create_enumerator(list),
+ (void*)filter, NULL, NULL);
+ crl = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509_CRL,
+ BUILD_SIGNING_KEY, private, BUILD_SIGNING_CERT, ca,
+ BUILD_SERIAL, chunk_create(crl_serial, sizeof(crl_serial)),
+ BUILD_NOT_BEFORE_TIME, thisUpdate, BUILD_NOT_AFTER_TIME, nextUpdate,
+ BUILD_REVOKED_ENUMERATOR, enumerator, BUILD_DIGEST_ALG, digest,
+ lastenum ? BUILD_REVOKED_ENUMERATOR : BUILD_END, lastenum,
+ BUILD_END);
+ enumerator->destroy(enumerator);
+ DESTROY_IF(lastenum);
+ DESTROY_IF((certificate_t*)lastcrl);
+
+ if (!crl)
+ {
+ error = "generating CRL failed";
+ goto error;
+ }
+ if (!crl->get_encoding(crl, form, &encoding))
+ {
+ error = "encoding CRL failed";
+ goto error;
+ }
+ if (fwrite(encoding.ptr, encoding.len, 1, stdout) != 1)
+ {
+ error = "writing CRL failed";
+ goto error;
+ }
+
+error:
+ DESTROY_IF(public);
+ DESTROY_IF(private);
+ DESTROY_IF(ca);
+ DESTROY_IF(crl);
+ free(encoding.ptr);
+ list->destroy_function(list, (void*)revoked_destroy);
+ if (error)
+ {
+ fprintf(stderr, "%s\n", error);
+ return 1;
+ }
+ return 0;
+
+usage:
+ list->destroy_function(list, (void*)revoked_destroy);
+ return command_usage(error);
+}
+
+/**
+ * Register the command.
+ */
+static void __attribute__ ((constructor))reg()
+{
+ command_register((command_t) {
+ sign_crl, 'c', "signcrl",
+ "issue a CRL using a CA certificate and key",
+ {"--cacert file --cakey file --lifetime days",
+ "[ [--reason key-compromise|ca-compromise|affiliation-changed|",
+ " superseded|cessation-of-operation|certificate-hold]",
+ " [--date timestamp]",
+ " --cert file | --serial hex ]*",
+ "[--digest md5|sha1|sha224|sha256|sha384|sha512] [--outform der|pem]"},
+ {
+ {"help", 'h', 0, "show usage information"},
+ {"cacert", 'c', 1, "CA certificate file"},
+ {"cakey", 'k', 1, "CA private key file"},
+ {"lifetime",'l', 1, "days the CRL gets a nextUpdate, default: 15"},
+ {"lastcrl", 'a', 1, "CRL of lastUpdate to copy revocations from"},
+ {"cert", 'z', 1, "certificate file to revoke"},
+ {"serial", 's', 1, "hex encoded certificate serial number to revoke"},
+ {"reason", 'r', 1, "reason for certificate revocation"},
+ {"date", 'd', 1, "revocation date as unix timestamp, default: now"},
+ {"digest", 'g', 1, "digest for signature creation, default: sha1"},
+ {"outform", 'f', 1, "encoding of generated crl, default: der"},
+ }
+ });
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 17:58:50 +0000