*/
#include <openssl/opensslconf.h>
-#ifndef OPENSSL_NO_KRB5
+
#define _XOPEN_SOURCE /* glibc2 needs this to declare strptime() */
#include <time.h>
#include <string.h>
#include <openssl/objects.h>
#include <openssl/krb5_asn.h>
+#ifndef OPENSSL_NO_KRB5
+
/*
* When OpenSSL is built on Windows, we do not want to require that
* the Kerberos DLLs be available in order for the OpenSSL DLLs to
#define krb5_rd_req kssl_krb5_rd_req
#define krb5_kt_default kssl_krb5_kt_default
#define krb5_kt_resolve kssl_krb5_kt_resolve
+/* macros in mit 1.2.2 and earlier; functions in mit 1.2.3 and greater */
+#ifndef krb5_kt_close
+#define krb5_kt_close kssl_krb5_kt_close
+#endif /* krb5_kt_close */
+#ifndef krb5_kt_get_entry
+#define krb5_kt_get_entry kssl_krb5_kt_get_entry
+#endif /* krb5_kt_get_entry */
#define krb5_auth_con_init kssl_krb5_auth_con_init
#define krb5_principal_compare kssl_krb5_principal_compare
-/* macro #define krb5_kt_get_entry kssl_krb5_kt_get_entry */
#define krb5_decrypt_tkt_part kssl_krb5_decrypt_tkt_part
#define krb5_timeofday kssl_krb5_timeofday
#define krb5_rc_default kssl_krb5_rc_default
+
+#ifdef krb5_rc_initialize
+#undef krb5_rc_initialize
+#endif
#define krb5_rc_initialize kssl_krb5_rc_initialize
+
+#ifdef krb5_rc_get_lifespan
+#undef krb5_rc_get_lifespan
+#endif
#define krb5_rc_get_lifespan kssl_krb5_rc_get_lifespan
+
+#ifdef krb5_rc_destroy
+#undef krb5_rc_destroy
+#endif
#define krb5_rc_destroy kssl_krb5_rc_destroy
+
#define valid_cksumtype kssl_valid_cksumtype
#define krb5_checksum_size kssl_krb5_checksum_size
#define krb5_kt_free_entry kssl_krb5_kt_free_entry
static krb5_error_code (* p_krb5_auth_con_getrcache)(krb5_context,
krb5_auth_context,
krb5_rcache *)=NULL;
+static krb5_error_code (_stdcall * p_krb5_kt_close)(krb5_context context,
+ krb5_keytab keytab)=NULL;
+static krb5_error_code (_stdcall * p_krb5_kt_get_entry)(krb5_context context,
+ krb5_keytab keytab,
+ krb5_const_principal principal, krb5_kvno vno,
+ krb5_enctype enctype, krb5_keytab_entry *entry)=NULL;
static int krb5_loaded = 0; /* only attempt to initialize func ptrs once */
/* Function to Load the Kerberos 5 DLL and initialize function pointers */
GetProcAddress( hKRB5_32, "krb5_get_server_rcache" );
(FARPROC) p_krb5_auth_con_getrcache =
GetProcAddress( hKRB5_32, "krb5_auth_con_getrcache" );
+ (FARPROC) p_krb5_kt_close =
+ GetProcAddress( hKRB5_32, "krb5_kt_close" );
+ (FARPROC) p_krb5_kt_get_entry =
+ GetProcAddress( hKRB5_32, "krb5_kt_get_entry" );
}
/* Stubs for each function to be dynamicly loaded */
kssl_krb5_get_server_rcache(krb5_context con, krb5_const krb5_data * data,
krb5_rcache * rcache)
{
- if ( p_krb5_get_server_rcache )
- return(p_krb5_get_server_rcache(con,data,rcache));
- else
- return KRB5KRB_ERR_GENERIC;
+ if ( p_krb5_get_server_rcache )
+ return(p_krb5_get_server_rcache(con,data,rcache));
+ else
+ return KRB5KRB_ERR_GENERIC;
}
krb5_error_code
kssl_krb5_auth_con_getrcache(krb5_context con, krb5_auth_context acon,
krb5_rcache * prcache)
{
- if ( p_krb5_auth_con_getrcache )
- return(p_krb5_auth_con_getrcache(con,acon, prcache));
- else
- return KRB5KRB_ERR_GENERIC;
+ if ( p_krb5_auth_con_getrcache )
+ return(p_krb5_auth_con_getrcache(con,acon, prcache));
+ else
+ return KRB5KRB_ERR_GENERIC;
+ }
+
+krb5_error_code
+kssl_krb5_kt_close(krb5_context context, krb5_keytab keytab)
+ {
+ if ( p_krb5_kt_close )
+ return(p_krb5_kt_close(context,keytab));
+ else
+ return KRB5KRB_ERR_GENERIC;
+ }
+
+krb5_error_code
+kssl_krb5_kt_get_entry(krb5_context context, krb5_keytab keytab,
+ krb5_const_principal principal, krb5_kvno vno,
+ krb5_enctype enctype, krb5_keytab_entry *entry)
+ {
+ if ( p_krb5_kt_get_entry )
+ return(p_krb5_kt_get_entry(context,keytab,principal,vno,enctype,entry));
+ else
+ return KRB5KRB_ERR_GENERIC;
}
#endif /* OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32 */
return ((string == NULL)? null: string);
}
-#define MAXKNUM 255
-char
-*knumber(int len, krb5_octet *contents)
- {
- static char buf[MAXKNUM+1];
- int i;
-
- BIO_snprintf(buf, MAXKNUM, "[%d] ", len);
-
- for (i=0; i < len && MAXKNUM > strlen(buf)+3; i++)
- {
- BIO_snprintf(&buf[strlen(buf)], 3, "%02x", contents[i]);
- }
-
- return (buf);
- }
-
-
-/* Given KRB5 enctype (basically DES or 3DES), return
+/* Given KRB5 enctype (basically DES or 3DES),
+** return closest match openssl EVP_ encryption algorithm.
+** Return NULL for unknown or problematic (krb5_dk_encrypt) enctypes.
+** Assume ENCTYPE_*_RAW (krb5_raw_encrypt) are OK.
*/
-EVP_CIPHER *
+const EVP_CIPHER *
kssl_map_enc(krb5_enctype enctype)
{
switch (enctype)
{
+ case ENCTYPE_DES_HMAC_SHA1: /* EVP_des_cbc(); */
case ENCTYPE_DES_CBC_CRC:
case ENCTYPE_DES_CBC_MD4:
case ENCTYPE_DES_CBC_MD5:
case ENCTYPE_DES_CBC_RAW:
-#if ! defined(KRB5_MIT_OLD11)
- case ENCTYPE_DES_HMAC_SHA1:
-#endif
- return (EVP_CIPHER *) EVP_des_cbc();
+ return EVP_des_cbc();
break;
+ case ENCTYPE_DES3_CBC_SHA1: /* EVP_des_ede3_cbc(); */
case ENCTYPE_DES3_CBC_SHA:
case ENCTYPE_DES3_CBC_RAW:
-#if ! defined(KRB5_MIT_OLD11)
- case ENCTYPE_DES3_CBC_SHA1:
-#endif
- return (EVP_CIPHER *) EVP_des_ede3_cbc();
+ return EVP_des_ede3_cbc();
break;
- default: return (EVP_CIPHER *) NULL;
+ default: return NULL;
break;
}
}
** what the highest assigned CKSUMTYPE_ constant is. As of 1.2.2
** it is 0x000c (CKSUMTYPE_HMAC_SHA1_DES3). So we will use 0x0010.
*/
-int *populate_cksumlens(void)
+size_t *populate_cksumlens(void)
{
- int i, j, n = 0x0010+1;
+ int i, j, n;
static size_t *cklens = NULL;
+#ifdef KRB5_MIT_OLD11
+ n = krb5_max_cksum;
+#else
+ n = 0x0010;
+#endif /* KRB5_MIT_OLD11 */
+
#ifdef KRB5CHECKAUTH
- if (!cklens && !(cklens = (size_t *) calloc(sizeof(int), n))) return NULL;
+ if (!cklens && !(cklens = (size_t *) calloc(sizeof(int),n+1))) return NULL;
for (i=0; i < n; i++) {
if (!valid_cksumtype(i)) continue; /* array has holes */
*/
unsigned char *kssl_skip_confound(krb5_enctype etype, unsigned char *a)
{
- int i, cklen, conlen;
- static int *cksumlens = NULL;
+ int i, conlen;
+ size_t cklen;
+ static size_t *cksumlens = NULL;
unsigned char *test_auth;
conlen = (etype)? 8: 0;
void
print_krb5_data(char *label, krb5_data *kdata)
{
- unsigned int i;
+ int i;
printf("%s[%d] ", label, kdata->length);
for (i=0; i < kdata->length; i++)
void
print_krb5_keyblock(char *label, krb5_keyblock *keyblk)
{
- unsigned int i;
+ int i;
if (keyblk == NULL)
{
void
print_krb5_princ(char *label, krb5_principal_data *princ)
{
- unsigned int ui, uj;
- int i;
+ int i, ui, uj;
printf("%s principal Realm: ", label);
if (princ == NULL) return;
}
arlen = krb5_app_req.length;
- p = krb5_app_req.data;
+ p = (unsigned char *)krb5_app_req.data;
ap_req = (KRB5_APREQBODY *) d2i_KRB5_APREQ(NULL, &p, arlen);
if (ap_req)
{
if (authenp->length &&
(authenp->data = malloc(authenp->length)))
{
- unsigned char *p = authenp->data;
+ unsigned char *adp = (unsigned char *)authenp->data;
authenp->length = i2d_KRB5_ENCDATA(
- ap_req->authenticator, &p);
+ ap_req->authenticator, &adp);
}
}
if (asn1ticket == NULL || asn1ticket->realm == NULL ||
asn1ticket->sname == NULL ||
- asn1ticket->sname->namestring == NULL ||
- asn1ticket->sname->namestring->num < 2)
+ sk_ASN1_GENERALSTRING_num(asn1ticket->sname->namestring) < 2)
{
BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
"Null field in asn1ticket.\n");
return ENOMEM; /* or KRB5KRB_ERR_GENERIC; */
}
- gstr_svc = (ASN1_GENERALSTRING*)asn1ticket->sname->namestring->data[0];
- gstr_host = (ASN1_GENERALSTRING*)asn1ticket->sname->namestring->data[1];
+ gstr_svc = sk_ASN1_GENERALSTRING_value(asn1ticket->sname->namestring, 0);
+ gstr_host = sk_ASN1_GENERALSTRING_value(asn1ticket->sname->namestring, 1);
if ((krb5rc = kssl_build_principal_2(krb5context,
&new5ticket->server,
- asn1ticket->realm->length, asn1ticket->realm->data,
- gstr_svc->length, gstr_svc->data,
- gstr_host->length, gstr_host->data)) != 0)
+ asn1ticket->realm->length, (char *)asn1ticket->realm->data,
+ gstr_svc->length, (char *)gstr_svc->data,
+ gstr_host->length, (char *)gstr_host->data)) != 0)
{
free(new5ticket);
BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
** &ap_option, &krb5ticket)) != 0) { Error }
*/
- p = indata->data;
+ p = (unsigned char *)indata->data;
if ((asn1ticket = (KRB5_TKTBODY *) d2i_KRB5_TICKET(NULL, &p,
(long) indata->length)) == NULL)
{
{
if (kssl_ctx == NULL) return kssl_ctx;
- if (kssl_ctx->key) memset(kssl_ctx->key, 0,
+ if (kssl_ctx->key) OPENSSL_cleanse(kssl_ctx->key,
kssl_ctx->length);
if (kssl_ctx->key) free(kssl_ctx->key);
if (kssl_ctx->client_princ) free(kssl_ctx->client_princ);
else
{
strncpy(*princ, entity->data, entity->length);
+ (*princ)[entity->length]='\0';
if (realm)
{
strcat (*princ, "@");
(void) strncat(*princ, realm->data, realm->length);
+ (*princ)[entity->length+1+realm->length]='\0';
}
}
if (kssl_ctx->key)
{
- memset(kssl_ctx->key, 0, kssl_ctx->length);
+ OPENSSL_cleanse(kssl_ctx->key, kssl_ctx->length);
free(kssl_ctx->key);
}
}
#endif /* !OPENSSL_SYS_WINDOWS && !OPENSSL_SYS_WIN32 */
+
+/* Given pointers to KerberosTime and struct tm structs, convert the
+** KerberosTime string to struct tm. Note that KerberosTime is a
+** ASN1_GENERALIZEDTIME value, constrained to GMT with no fractional
+** seconds as defined in RFC 1510.
+** Return pointer to the (partially) filled in struct tm on success,
+** return NULL on failure.
+*/
+struct tm *k_gmtime(ASN1_GENERALIZEDTIME *gtime, struct tm *k_tm)
+ {
+ char c, *p;
+
+ if (!k_tm) return NULL;
+ if (gtime == NULL || gtime->length < 14) return NULL;
+ if (gtime->data == NULL) return NULL;
+
+ p = (char *)>ime->data[14];
+
+ c = *p; *p = '\0'; p -= 2; k_tm->tm_sec = atoi(p); *(p+2) = c;
+ c = *p; *p = '\0'; p -= 2; k_tm->tm_min = atoi(p); *(p+2) = c;
+ c = *p; *p = '\0'; p -= 2; k_tm->tm_hour = atoi(p); *(p+2) = c;
+ c = *p; *p = '\0'; p -= 2; k_tm->tm_mday = atoi(p); *(p+2) = c;
+ c = *p; *p = '\0'; p -= 2; k_tm->tm_mon = atoi(p)-1; *(p+2) = c;
+ c = *p; *p = '\0'; p -= 4; k_tm->tm_year = atoi(p)-1900; *(p+4) = c;
+
+ return k_tm;
+ }
+
+
/* Helper function for kssl_validate_times().
** We need context->clockskew, but krb5_context is an opaque struct.
** So we try to sneek the clockskew out through the replay cache.
KRB5_AUTHENTBODY *auth = NULL;
krb5_enctype enctype;
EVP_CIPHER_CTX ciph_ctx;
- EVP_CIPHER *enc = NULL;
+ const EVP_CIPHER *enc = NULL;
unsigned char iv[EVP_MAX_IV_LENGTH];
- unsigned char *p, *unenc_authent, *tbuf = NULL;
+ unsigned char *p, *unenc_authent;
int padl, outl, unencbufsize;
+ struct tm tm_time, *tm_l, *tm_g;
+ time_t now, tl, tg, tr, tz_offset;
+ EVP_CIPHER_CTX_init(&ciph_ctx);
*atimep = 0;
kssl_err_set(kssl_err, 0, "");
if (authentp == NULL || authentp->length == 0) return 0;
#ifdef KSSL_DEBUG
+ {
+ unsigned int ui;
printf("kssl_check_authent: authenticator[%d]:\n",authentp->length);
p = authentp->data;
- for (padl=0; padl < authentp->length; padl++) printf("%02x ",p[padl]);
+ for (ui=0; ui < authentp->length; ui++) printf("%02x ",p[ui]);
printf("\n");
+ }
#endif /* KSSL_DEBUG */
unencbufsize = 2 * authentp->length;
goto err;
}
- p = authentp->data;
+ p = (unsigned char *)authentp->data;
if ((dec_authent = d2i_KRB5_ENCDATA(NULL, &p,
(long) authentp->length)) == NULL)
{
}
enctype = dec_authent->etype->data[0]; /* should = kssl_ctx->enctype */
+#if !defined(KRB5_MIT_OLD11)
+ switch ( enctype ) {
+ case ENCTYPE_DES3_CBC_SHA1: /* EVP_des_ede3_cbc(); */
+ case ENCTYPE_DES3_CBC_SHA:
+ case ENCTYPE_DES3_CBC_RAW:
+ krb5rc = 0; /* Skip, can't handle derived keys */
+ goto err;
+ }
+#endif
enc = kssl_map_enc(enctype);
- memset(iv, 0, EVP_MAX_IV_LENGTH); /* per RFC 1510 */
+ memset(iv, 0, sizeof iv); /* per RFC 1510 */
- EVP_DecryptInit(&ciph_ctx, enc, kssl_ctx->key, iv);
- EVP_DecryptUpdate(&ciph_ctx, unenc_authent, &outl,
- dec_authent->cipher->data, dec_authent->cipher->length);
- if (outl > unencbufsize)
- {
- kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
- "Buffer overflow decrypting authenticator.\n");
- krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
- goto err;
- }
- EVP_DecryptFinal(&ciph_ctx, &(unenc_authent[outl]), &padl);
- outl += padl;
- if (outl > unencbufsize)
+ if (enc == NULL)
{
- kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
- "Buffer overflow decrypting authenticator.\n");
- krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
+ /* Disable kssl_check_authent for ENCTYPE_DES3_CBC_SHA1.
+ ** This enctype indicates the authenticator was encrypted
+ ** using key-usage derived keys which openssl cannot decrypt.
+ */
goto err;
}
- EVP_CIPHER_CTX_cleanup(&ciph_ctx);
+
+ if (!EVP_CipherInit(&ciph_ctx,enc,kssl_ctx->key,iv,0))
+ {
+ kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
+ "EVP_DecryptInit_ex error decrypting authenticator.\n");
+ krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
+ goto err;
+ }
+ outl = dec_authent->cipher->length;
+ if (!EVP_Cipher(&ciph_ctx,unenc_authent,dec_authent->cipher->data,outl))
+ {
+ kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
+ "EVP_Cipher error decrypting authenticator.\n");
+ krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
+ goto err;
+ }
+ EVP_CIPHER_CTX_cleanup(&ciph_ctx);
#ifdef KSSL_DEBUG
printf("kssl_check_authent: decrypted authenticator[%d] =\n", outl);
krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
goto err;
}
- if ((tbuf = calloc(1, auth->ctime->length + 1)) == NULL)
- {
- kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
- "Unable to allocate atime buffer.\n");
- krb5rc = KRB5KRB_ERR_GENERIC;
- goto err;
- }
- else strncpy(tbuf, auth->ctime->data, auth->ctime->length);
-
- if ( auth->ctime->length >= 9 && auth->ctime->length <= 14 )
- /* tbuf == "%Y%m%d%H%M%S" */
- {
- struct tm tm_time, *tm_l, *tm_g;
- time_t now, tl, tg, tr, tz_offset;
- int i;
- char *p = tbuf;
-
- memset(&tm_time,0,sizeof(struct tm));
- for ( i=0;
- i<4 && isdigit(*p);
- i++, p++ )
- tm_time.tm_year = tm_time.tm_year*10 + (*p-'0');
- for ( i=0;
- i<2 && isdigit(*p) && tm_time.tm_mon <= 1;
- i++, p++ )
- tm_time.tm_mon = tm_time.tm_mon*10 + (*p-'0');
- for ( i=0;
- i<2 && isdigit(*p) && tm_time.tm_mday <= 3;
- i++, p++ )
- tm_time.tm_mday = tm_time.tm_mday*10 + (*p-'0');
- for ( i=0;
- i<2 && isdigit(*p) && tm_time.tm_hour <= 2;
- i++, p++ )
- tm_time.tm_hour = tm_time.tm_hour*10 + (*p-'0');
- for ( i=0;
- i<2 && isdigit(*p) && tm_time.tm_min <= 6;
- i++, p++ )
- tm_time.tm_min = tm_time.tm_min*10 + (*p-'0');
- for ( i=0;
- i<2 && isdigit(*p) && tm_time.tm_sec <= 6;
- i++, p++ )
- tm_time.tm_sec = tm_time.tm_sec*10 + (*p-'0');
-
- now = time(&now);
- tm_l = localtime(&now); tl = mktime(tm_l);
- tm_g = gmtime(&now); tg = mktime(tm_g);
- tz_offset = tg - tl;
- tr = mktime(&tm_time);
-
- if (tr != (time_t)(-1))
- *atimep = mktime(&tm_time) - tz_offset;
- }
+
+ memset(&tm_time,0,sizeof(struct tm));
+ if (k_gmtime(auth->ctime, &tm_time) &&
+ ((tr = mktime(&tm_time)) != (time_t)(-1)))
+ {
+ now = time(&now);
+ tm_l = localtime(&now); tl = mktime(tm_l);
+ tm_g = gmtime(&now); tg = mktime(tm_g);
+ tz_offset = tg - tl;
+
+ *atimep = tr - tz_offset;
+ }
+
#ifdef KSSL_DEBUG
- printf("kssl_check_authent: client time %s = %d\n", tbuf, *atimep);
+ printf("kssl_check_authent: returns %d for client time ", *atimep);
+ if (auth && auth->ctime && auth->ctime->length && auth->ctime->data)
+ printf("%.*s\n", auth->ctime->length, auth->ctime->data);
+ else printf("NULL\n");
#endif /* KSSL_DEBUG */
err:
- if (tbuf) free(tbuf);
if (auth) KRB5_AUTHENT_free((KRB5_AUTHENT *) auth);
if (dec_authent) KRB5_ENCDATA_free(dec_authent);
if (unenc_authent) free(unenc_authent);
projects / openssl.git / blobdiff