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pkinit_crypto_openssl.c
5693 lines (5038 loc) · 179 KB
/
pkinit_crypto_openssl.c
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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* COPYRIGHT (C) 2006,2007
* THE REGENTS OF THE UNIVERSITY OF MICHIGAN
* ALL RIGHTS RESERVED
*
* Permission is granted to use, copy, create derivative works
* and redistribute this software and such derivative works
* for any purpose, so long as the name of The University of
* Michigan is not used in any advertising or publicity
* pertaining to the use of distribution of this software
* without specific, written prior authorization. If the
* above copyright notice or any other identification of the
* University of Michigan is included in any copy of any
* portion of this software, then the disclaimer below must
* also be included.
*
* THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION
* FROM THE UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY
* PURPOSE, AND WITHOUT WARRANTY BY THE UNIVERSITY OF
* MICHIGAN OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING
* WITHOUT LIMITATION THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
* REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE LIABLE
* FOR ANY DAMAGES, INCLUDING SPECIAL, INDIRECT, INCIDENTAL, OR
* CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM ARISING
* OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN
* IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGES.
*/
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
#include <unistd.h>
#include <dirent.h>
#include "k5-platform.h"
#include "pkinit_crypto_openssl.h"
static struct pkcs11_errstrings {
short code;
char *text;
} pkcs11_errstrings[] = {
{ 0x0, "ok" },
{ 0x1, "cancel" },
{ 0x2, "host memory" },
{ 0x3, "slot id invalid" },
{ 0x5, "general error" },
{ 0x6, "function failed" },
{ 0x7, "arguments bad" },
{ 0x8, "no event" },
{ 0x9, "need to create threads" },
{ 0xa, "cant lock" },
{ 0x10, "attribute read only" },
{ 0x11, "attribute sensitive" },
{ 0x12, "attribute type invalid" },
{ 0x13, "attribute value invalid" },
{ 0x20, "data invalid" },
{ 0x21, "data len range" },
{ 0x30, "device error" },
{ 0x31, "device memory" },
{ 0x32, "device removed" },
{ 0x40, "encrypted data invalid" },
{ 0x41, "encrypted data len range" },
{ 0x50, "function canceled" },
{ 0x51, "function not parallel" },
{ 0x54, "function not supported" },
{ 0x60, "key handle invalid" },
{ 0x62, "key size range" },
{ 0x63, "key type inconsistent" },
{ 0x64, "key not needed" },
{ 0x65, "key changed" },
{ 0x66, "key needed" },
{ 0x67, "key indigestible" },
{ 0x68, "key function not permitted" },
{ 0x69, "key not wrappable" },
{ 0x6a, "key unextractable" },
{ 0x70, "mechanism invalid" },
{ 0x71, "mechanism param invalid" },
{ 0x82, "object handle invalid" },
{ 0x90, "operation active" },
{ 0x91, "operation not initialized" },
{ 0xa0, "pin incorrect" },
{ 0xa1, "pin invalid" },
{ 0xa2, "pin len range" },
{ 0xa3, "pin expired" },
{ 0xa4, "pin locked" },
{ 0xb0, "session closed" },
{ 0xb1, "session count" },
{ 0xb3, "session handle invalid" },
{ 0xb4, "session parallel not supported" },
{ 0xb5, "session read only" },
{ 0xb6, "session exists" },
{ 0xb7, "session read only exists" },
{ 0xb8, "session read write so exists" },
{ 0xc0, "signature invalid" },
{ 0xc1, "signature len range" },
{ 0xd0, "template incomplete" },
{ 0xd1, "template inconsistent" },
{ 0xe0, "token not present" },
{ 0xe1, "token not recognized" },
{ 0xe2, "token write protected" },
{ 0xf0, "unwrapping key handle invalid" },
{ 0xf1, "unwrapping key size range" },
{ 0xf2, "unwrapping key type inconsistent" },
{ 0x100, "user already logged in" },
{ 0x101, "user not logged in" },
{ 0x102, "user pin not initialized" },
{ 0x103, "user type invalid" },
{ 0x104, "user another already logged in" },
{ 0x105, "user too many types" },
{ 0x110, "wrapped key invalid" },
{ 0x112, "wrapped key len range" },
{ 0x113, "wrapping key handle invalid" },
{ 0x114, "wrapping key size range" },
{ 0x115, "wrapping key type inconsistent" },
{ 0x120, "random seed not supported" },
{ 0x121, "random no rng" },
{ 0x130, "domain params invalid" },
{ 0x150, "buffer too small" },
{ 0x160, "saved state invalid" },
{ 0x170, "information sensitive" },
{ 0x180, "state unsaveable" },
{ 0x190, "cryptoki not initialized" },
{ 0x191, "cryptoki already initialized" },
{ 0x1a0, "mutex bad" },
{ 0x1a1, "mutex not locked" },
{ 0x200, "function rejected" },
{ -1, NULL }
};
/* DH parameters */
unsigned char pkinit_1024_dhprime[128] = {
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1,
0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22,
0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B,
0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45,
0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B,
0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5,
0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
0x49, 0x28, 0x66, 0x51, 0xEC, 0xE6, 0x53, 0x81,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
};
unsigned char pkinit_2048_dhprime[2048/8] = {
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1,
0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22,
0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B,
0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45,
0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B,
0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5,
0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D,
0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05,
0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A,
0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96,
0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB,
0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D,
0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04,
0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C,
0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03,
0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,
0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9,
0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18,
0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5,
0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAC, 0xAA, 0x68,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
};
unsigned char pkinit_4096_dhprime[4096/8] = {
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1,
0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22,
0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B,
0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45,
0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B,
0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5,
0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D,
0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05,
0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A,
0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96,
0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB,
0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D,
0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04,
0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C,
0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03,
0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,
0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9,
0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18,
0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5,
0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAA, 0xC4, 0x2D,
0xAD, 0x33, 0x17, 0x0D, 0x04, 0x50, 0x7A, 0x33,
0xA8, 0x55, 0x21, 0xAB, 0xDF, 0x1C, 0xBA, 0x64,
0xEC, 0xFB, 0x85, 0x04, 0x58, 0xDB, 0xEF, 0x0A,
0x8A, 0xEA, 0x71, 0x57, 0x5D, 0x06, 0x0C, 0x7D,
0xB3, 0x97, 0x0F, 0x85, 0xA6, 0xE1, 0xE4, 0xC7,
0xAB, 0xF5, 0xAE, 0x8C, 0xDB, 0x09, 0x33, 0xD7,
0x1E, 0x8C, 0x94, 0xE0, 0x4A, 0x25, 0x61, 0x9D,
0xCE, 0xE3, 0xD2, 0x26, 0x1A, 0xD2, 0xEE, 0x6B,
0xF1, 0x2F, 0xFA, 0x06, 0xD9, 0x8A, 0x08, 0x64,
0xD8, 0x76, 0x02, 0x73, 0x3E, 0xC8, 0x6A, 0x64,
0x52, 0x1F, 0x2B, 0x18, 0x17, 0x7B, 0x20, 0x0C,
0xBB, 0xE1, 0x17, 0x57, 0x7A, 0x61, 0x5D, 0x6C,
0x77, 0x09, 0x88, 0xC0, 0xBA, 0xD9, 0x46, 0xE2,
0x08, 0xE2, 0x4F, 0xA0, 0x74, 0xE5, 0xAB, 0x31,
0x43, 0xDB, 0x5B, 0xFC, 0xE0, 0xFD, 0x10, 0x8E,
0x4B, 0x82, 0xD1, 0x20, 0xA9, 0x21, 0x08, 0x01,
0x1A, 0x72, 0x3C, 0x12, 0xA7, 0x87, 0xE6, 0xD7,
0x88, 0x71, 0x9A, 0x10, 0xBD, 0xBA, 0x5B, 0x26,
0x99, 0xC3, 0x27, 0x18, 0x6A, 0xF4, 0xE2, 0x3C,
0x1A, 0x94, 0x68, 0x34, 0xB6, 0x15, 0x0B, 0xDA,
0x25, 0x83, 0xE9, 0xCA, 0x2A, 0xD4, 0x4C, 0xE8,
0xDB, 0xBB, 0xC2, 0xDB, 0x04, 0xDE, 0x8E, 0xF9,
0x2E, 0x8E, 0xFC, 0x14, 0x1F, 0xBE, 0xCA, 0xA6,
0x28, 0x7C, 0x59, 0x47, 0x4E, 0x6B, 0xC0, 0x5D,
0x99, 0xB2, 0x96, 0x4F, 0xA0, 0x90, 0xC3, 0xA2,
0x23, 0x3B, 0xA1, 0x86, 0x51, 0x5B, 0xE7, 0xED,
0x1F, 0x61, 0x29, 0x70, 0xCE, 0xE2, 0xD7, 0xAF,
0xB8, 0x1B, 0xDD, 0x76, 0x21, 0x70, 0x48, 0x1C,
0xD0, 0x06, 0x91, 0x27, 0xD5, 0xB0, 0x5A, 0xA9,
0x93, 0xB4, 0xEA, 0x98, 0x8D, 0x8F, 0xDD, 0xC1,
0x86, 0xFF, 0xB7, 0xDC, 0x90, 0xA6, 0xC0, 0x8F,
0x4D, 0xF4, 0x35, 0xC9, 0x34, 0x06, 0x31, 0x99,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
};
static int pkinit_oids_refs = 0;
krb5_error_code
pkinit_init_plg_crypto(pkinit_plg_crypto_context *cryptoctx)
{
krb5_error_code retval = ENOMEM;
pkinit_plg_crypto_context ctx = NULL;
/* initialize openssl routines */
openssl_init();
ctx = malloc(sizeof(*ctx));
if (ctx == NULL)
goto out;
memset(ctx, 0, sizeof(*ctx));
pkiDebug("%s: initializing openssl crypto context at %p\n",
__FUNCTION__, ctx);
retval = pkinit_init_pkinit_oids(ctx);
if (retval)
goto out;
retval = pkinit_init_dh_params(ctx);
if (retval)
goto out;
*cryptoctx = ctx;
out:
if (retval && ctx != NULL)
pkinit_fini_plg_crypto(ctx);
return retval;
}
void
pkinit_fini_plg_crypto(pkinit_plg_crypto_context cryptoctx)
{
pkiDebug("%s: freeing context at %p\n", __FUNCTION__, cryptoctx);
if (cryptoctx == NULL)
return;
pkinit_fini_pkinit_oids(cryptoctx);
pkinit_fini_dh_params(cryptoctx);
free(cryptoctx);
}
krb5_error_code
pkinit_init_identity_crypto(pkinit_identity_crypto_context *idctx)
{
krb5_error_code retval = ENOMEM;
pkinit_identity_crypto_context ctx = NULL;
ctx = malloc(sizeof(*ctx));
if (ctx == NULL)
goto out;
memset(ctx, 0, sizeof(*ctx));
retval = pkinit_init_certs(ctx);
if (retval)
goto out;
retval = pkinit_init_pkcs11(ctx);
if (retval)
goto out;
pkiDebug("%s: returning ctx at %p\n", __FUNCTION__, ctx);
*idctx = ctx;
out:
if (retval) {
if (ctx)
pkinit_fini_identity_crypto(ctx);
}
return retval;
}
void
pkinit_fini_identity_crypto(pkinit_identity_crypto_context idctx)
{
if (idctx == NULL)
return;
pkiDebug("%s: freeing ctx at %p\n", __FUNCTION__, idctx);
pkinit_fini_certs(idctx);
pkinit_fini_pkcs11(idctx);
free(idctx);
}
krb5_error_code
pkinit_init_req_crypto(pkinit_req_crypto_context *cryptoctx)
{
krb5_error_code retval = ENOMEM;
pkinit_req_crypto_context ctx = NULL;
ctx = malloc(sizeof(*ctx));
if (ctx == NULL)
goto out;
memset(ctx, 0, sizeof(*ctx));
ctx->dh = NULL;
ctx->received_cert = NULL;
*cryptoctx = ctx;
pkiDebug("%s: returning ctx at %p\n", __FUNCTION__, ctx);
retval = 0;
out:
if (retval)
free(ctx);
return retval;
}
void
pkinit_fini_req_crypto(pkinit_req_crypto_context req_cryptoctx)
{
if (req_cryptoctx == NULL)
return;
pkiDebug("%s: freeing ctx at %p\n", __FUNCTION__, req_cryptoctx);
if (req_cryptoctx->dh != NULL)
DH_free(req_cryptoctx->dh);
if (req_cryptoctx->received_cert != NULL)
X509_free(req_cryptoctx->received_cert);
free(req_cryptoctx);
}
static krb5_error_code
pkinit_init_pkinit_oids(pkinit_plg_crypto_context ctx)
{
krb5_error_code retval = ENOMEM;
int nid = 0;
/*
* If OpenSSL already knows about the OID, use the
* existing definition. Otherwise, create an OID object.
*/
#define CREATE_OBJ_IF_NEEDED(oid, vn, sn, ln) \
nid = OBJ_txt2nid(oid); \
if (nid == NID_undef) { \
nid = OBJ_create(oid, sn, ln); \
if (nid == NID_undef) { \
pkiDebug("Error creating oid object for '%s'\n", oid); \
goto out; \
} \
} \
ctx->vn = OBJ_nid2obj(nid);
CREATE_OBJ_IF_NEEDED("1.3.6.1.5.2.2", id_pkinit_san,
"id-pkinit-san", "KRB5PrincipalName");
CREATE_OBJ_IF_NEEDED("1.3.6.1.5.2.3.1", id_pkinit_authData,
"id-pkinit-authdata", "PKINIT signedAuthPack");
CREATE_OBJ_IF_NEEDED("1.3.6.1.5.2.3.2", id_pkinit_DHKeyData,
"id-pkinit-DHKeyData", "PKINIT dhSignedData");
CREATE_OBJ_IF_NEEDED("1.3.6.1.5.2.3.3", id_pkinit_rkeyData,
"id-pkinit-rkeyData", "PKINIT encKeyPack");
CREATE_OBJ_IF_NEEDED("1.3.6.1.5.2.3.4", id_pkinit_KPClientAuth,
"id-pkinit-KPClientAuth", "PKINIT Client EKU");
CREATE_OBJ_IF_NEEDED("1.3.6.1.5.2.3.5", id_pkinit_KPKdc,
"id-pkinit-KPKdc", "KDC EKU");
#if 0
CREATE_OBJ_IF_NEEDED("1.2.840.113549.1.7.1", id_pkinit_authData9,
"id-pkcs7-data", "PKCS7 data");
#else
/* See note in pkinit_pkcs7type2oid() */
ctx->id_pkinit_authData9 = NULL;
#endif
CREATE_OBJ_IF_NEEDED("1.3.6.1.4.1.311.20.2.2", id_ms_kp_sc_logon,
"id-ms-kp-sc-logon EKU", "Microsoft SmartCard Login EKU");
CREATE_OBJ_IF_NEEDED("1.3.6.1.4.1.311.20.2.3", id_ms_san_upn,
"id-ms-san-upn", "Microsoft Universal Principal Name");
CREATE_OBJ_IF_NEEDED("1.3.6.1.5.5.7.3.1", id_kp_serverAuth,
"id-kp-serverAuth EKU", "Server Authentication EKU");
/* Success */
retval = 0;
pkinit_oids_refs++;
out:
return retval;
}
static krb5_error_code
get_cert(char *filename, X509 **retcert)
{
X509 *cert = NULL;
BIO *tmp = NULL;
int code;
krb5_error_code retval;
if (filename == NULL || retcert == NULL)
return EINVAL;
*retcert = NULL;
tmp = BIO_new(BIO_s_file());
if (tmp == NULL)
return ENOMEM;
code = BIO_read_filename(tmp, filename);
if (code == 0) {
retval = errno;
goto cleanup;
}
cert = (X509 *) PEM_read_bio_X509(tmp, NULL, NULL, NULL);
if (cert == NULL) {
retval = EIO;
pkiDebug("failed to read certificate from %s\n", filename);
goto cleanup;
}
*retcert = cert;
retval = 0;
cleanup:
if (tmp != NULL)
BIO_free(tmp);
return retval;
}
static krb5_error_code
get_key(char *filename, EVP_PKEY **retkey)
{
EVP_PKEY *pkey = NULL;
BIO *tmp = NULL;
int code;
krb5_error_code retval;
if (filename == NULL || retkey == NULL)
return EINVAL;
tmp = BIO_new(BIO_s_file());
if (tmp == NULL)
return ENOMEM;
code = BIO_read_filename(tmp, filename);
if (code == 0) {
retval = errno;
goto cleanup;
}
pkey = (EVP_PKEY *) PEM_read_bio_PrivateKey(tmp, NULL, NULL, NULL);
if (pkey == NULL) {
retval = EIO;
pkiDebug("failed to read private key from %s\n", filename);
goto cleanup;
}
*retkey = pkey;
retval = 0;
cleanup:
if (tmp != NULL)
BIO_free(tmp);
return retval;
}
static void
pkinit_fini_pkinit_oids(pkinit_plg_crypto_context ctx)
{
if (ctx == NULL)
return;
/* Only call OBJ_cleanup once! */
if (--pkinit_oids_refs == 0)
OBJ_cleanup();
}
static krb5_error_code
pkinit_init_dh_params(pkinit_plg_crypto_context plgctx)
{
krb5_error_code retval = ENOMEM;
plgctx->dh_1024 = DH_new();
if (plgctx->dh_1024 == NULL)
goto cleanup;
plgctx->dh_1024->p = BN_bin2bn(pkinit_1024_dhprime,
sizeof(pkinit_1024_dhprime), NULL);
if ((plgctx->dh_1024->g = BN_new()) == NULL ||
(plgctx->dh_1024->q = BN_new()) == NULL)
goto cleanup;
BN_set_word(plgctx->dh_1024->g, DH_GENERATOR_2);
BN_rshift1(plgctx->dh_1024->q, plgctx->dh_1024->p);
plgctx->dh_2048 = DH_new();
if (plgctx->dh_2048 == NULL)
goto cleanup;
plgctx->dh_2048->p = BN_bin2bn(pkinit_2048_dhprime,
sizeof(pkinit_2048_dhprime), NULL);
if ((plgctx->dh_2048->g = BN_new()) == NULL ||
(plgctx->dh_2048->q = BN_new()) == NULL)
goto cleanup;
BN_set_word(plgctx->dh_2048->g, DH_GENERATOR_2);
BN_rshift1(plgctx->dh_2048->q, plgctx->dh_2048->p);
plgctx->dh_4096 = DH_new();
if (plgctx->dh_4096 == NULL)
goto cleanup;
plgctx->dh_4096->p = BN_bin2bn(pkinit_4096_dhprime,
sizeof(pkinit_4096_dhprime), NULL);
if ((plgctx->dh_4096->g = BN_new()) == NULL ||
(plgctx->dh_4096->q = BN_new()) == NULL)
goto cleanup;
BN_set_word(plgctx->dh_4096->g, DH_GENERATOR_2);
BN_rshift1(plgctx->dh_4096->q, plgctx->dh_4096->p);
retval = 0;
cleanup:
if (retval)
pkinit_fini_dh_params(plgctx);
return retval;
}
static void
pkinit_fini_dh_params(pkinit_plg_crypto_context plgctx)
{
if (plgctx->dh_1024 != NULL)
DH_free(plgctx->dh_1024);
if (plgctx->dh_2048 != NULL)
DH_free(plgctx->dh_2048);
if (plgctx->dh_4096 != NULL)
DH_free(plgctx->dh_4096);
plgctx->dh_1024 = plgctx->dh_2048 = plgctx->dh_4096 = NULL;
}
static krb5_error_code
pkinit_init_certs(pkinit_identity_crypto_context ctx)
{
krb5_error_code retval = ENOMEM;
int i;
for (i = 0; i < MAX_CREDS_ALLOWED; i++)
ctx->creds[i] = NULL;
ctx->my_certs = NULL;
ctx->cert_index = 0;
ctx->my_key = NULL;
ctx->trustedCAs = NULL;
ctx->intermediateCAs = NULL;
ctx->revoked = NULL;
retval = 0;
return retval;
}
static void
pkinit_fini_certs(pkinit_identity_crypto_context ctx)
{
if (ctx == NULL)
return;
if (ctx->my_certs != NULL)
sk_X509_pop_free(ctx->my_certs, X509_free);
if (ctx->my_key != NULL)
EVP_PKEY_free(ctx->my_key);
if (ctx->trustedCAs != NULL)
sk_X509_pop_free(ctx->trustedCAs, X509_free);
if (ctx->intermediateCAs != NULL)
sk_X509_pop_free(ctx->intermediateCAs, X509_free);
if (ctx->revoked != NULL)
sk_X509_CRL_pop_free(ctx->revoked, X509_CRL_free);
}
static krb5_error_code
pkinit_init_pkcs11(pkinit_identity_crypto_context ctx)
{
krb5_error_code retval = ENOMEM;
#ifndef WITHOUT_PKCS11
ctx->p11_module_name = strdup(PKCS11_MODNAME);
if (ctx->p11_module_name == NULL)
return retval;
ctx->p11_module = NULL;
ctx->slotid = PK_NOSLOT;
ctx->token_label = NULL;
ctx->cert_label = NULL;
ctx->session = CK_INVALID_HANDLE;
ctx->p11 = NULL;
#endif
ctx->pkcs11_method = 0;
retval = 0;
return retval;
}
static void
pkinit_fini_pkcs11(pkinit_identity_crypto_context ctx)
{
#ifndef WITHOUT_PKCS11
if (ctx == NULL)
return;
if (ctx->p11 != NULL) {
if (ctx->session) {
ctx->p11->C_CloseSession(ctx->session);
ctx->session = CK_INVALID_HANDLE;
}
ctx->p11->C_Finalize(NULL_PTR);
ctx->p11 = NULL;
}
if (ctx->p11_module != NULL) {
pkinit_C_UnloadModule(ctx->p11_module);
ctx->p11_module = NULL;
}
free(ctx->p11_module_name);
free(ctx->token_label);
free(ctx->cert_id);
free(ctx->cert_label);
#endif
}
krb5_error_code
pkinit_identity_set_prompter(pkinit_identity_crypto_context id_cryptoctx,
krb5_prompter_fct prompter,
void *prompter_data)
{
id_cryptoctx->prompter = prompter;
id_cryptoctx->prompter_data = prompter_data;
return 0;
}
/*helper function for creating pkinit ContentInfo*/
static krb5_error_code create_contentinfo
(krb5_context context, pkinit_plg_crypto_context plg_crypto_context,
ASN1_OBJECT *oid,
unsigned char *data, size_t data_len,
PKCS7 **out_p7)
{
krb5_error_code retval = EINVAL;
PKCS7 *inner_p7;
ASN1_TYPE *pkinit_data = NULL;
*out_p7 = NULL;
if ((inner_p7 = PKCS7_new()) == NULL)
goto cleanup;
if ((pkinit_data = ASN1_TYPE_new()) == NULL)
goto cleanup;
pkinit_data->type = V_ASN1_OCTET_STRING;
if ((pkinit_data->value.octet_string = ASN1_OCTET_STRING_new()) == NULL)
goto cleanup;
if (!ASN1_OCTET_STRING_set(pkinit_data->value.octet_string, (unsigned char *) data,
data_len)) {
unsigned long err = ERR_peek_error();
retval = KRB5KDC_ERR_PREAUTH_FAILED;
krb5_set_error_message(context, retval, "%s\n",
ERR_error_string(err, NULL));
pkiDebug("failed to add pkcs7 data\n");
goto cleanup;
}
if (!PKCS7_set0_type_other(inner_p7, OBJ_obj2nid(oid), pkinit_data))
goto cleanup;
retval = 0;
*out_p7 = inner_p7;
inner_p7 = NULL;
pkinit_data = NULL;
cleanup:
if (inner_p7)
PKCS7_free(inner_p7);
if (pkinit_data)
ASN1_TYPE_free(pkinit_data);
return retval;
}
krb5_error_code cms_contentinfo_create
(krb5_context context, /* IN */
pkinit_plg_crypto_context plg_cryptoctx, /* IN */
pkinit_req_crypto_context req_cryptoctx, /* IN */
pkinit_identity_crypto_context id_cryptoctx, /* IN */
int cms_msg_type,
unsigned char *data, unsigned int data_len,
unsigned char **out_data, unsigned int *out_data_len)
{
krb5_error_code retval = ENOMEM;
ASN1_OBJECT *oid = NULL;
PKCS7 *p7 = NULL;
unsigned char *p;
/* pick the correct oid for the eContentInfo */
oid = pkinit_pkcs7type2oid(plg_cryptoctx, cms_msg_type);
if (oid == NULL)
goto cleanup;
retval = create_contentinfo(context, plg_cryptoctx, oid,
data, data_len, &p7);
if (retval != 0)
goto cleanup;
*out_data_len = i2d_PKCS7(p7, NULL);
if (!(*out_data_len)) {
unsigned long err = ERR_peek_error();
retval = KRB5KDC_ERR_PREAUTH_FAILED;
krb5_set_error_message(context, retval, "%s\n",
ERR_error_string(err, NULL));
pkiDebug("failed to der encode pkcs7\n");
goto cleanup;
}
retval = ENOMEM;
if ((p = *out_data = malloc(*out_data_len)) == NULL)
goto cleanup;
/* DER encode PKCS7 data */
retval = i2d_PKCS7(p7, &p);
if (!retval) {
unsigned long err = ERR_peek_error();
retval = KRB5KDC_ERR_PREAUTH_FAILED;
krb5_set_error_message(context, retval, "%s\n",
ERR_error_string(err, NULL));
pkiDebug("failed to der encode pkcs7\n");
goto cleanup;
}
retval = 0;
cleanup:
if (p7)
PKCS7_free(p7);
if (oid)
ASN1_OBJECT_free(oid);
return retval;
}
krb5_error_code
cms_signeddata_create(krb5_context context,
pkinit_plg_crypto_context plg_cryptoctx,
pkinit_req_crypto_context req_cryptoctx,
pkinit_identity_crypto_context id_cryptoctx,
int cms_msg_type,
int include_certchain,
unsigned char *data,
unsigned int data_len,
unsigned char **signed_data,
unsigned int *signed_data_len)
{
krb5_error_code retval = ENOMEM;
PKCS7 *p7 = NULL, *inner_p7 = NULL;
PKCS7_SIGNED *p7s = NULL;
PKCS7_SIGNER_INFO *p7si = NULL;
unsigned char *p;
STACK_OF(X509) * cert_stack = NULL;
ASN1_OCTET_STRING *digest_attr = NULL;
EVP_MD_CTX ctx, ctx2;
const EVP_MD *md_tmp = NULL;
unsigned char md_data[EVP_MAX_MD_SIZE], md_data2[EVP_MAX_MD_SIZE];
unsigned char *digestInfo_buf = NULL, *abuf = NULL;
unsigned int md_len, md_len2, alen, digestInfo_len;
STACK_OF(X509_ATTRIBUTE) * sk;
unsigned char *sig = NULL;
unsigned int sig_len = 0;
X509_ALGOR *alg = NULL;
ASN1_OCTET_STRING *digest = NULL;
unsigned int alg_len = 0, digest_len = 0;
unsigned char *y = NULL, *alg_buf = NULL, *digest_buf = NULL;
X509 *cert = NULL;
ASN1_OBJECT *oid = NULL;
if (id_cryptoctx->my_certs == NULL) {
krb5_set_error_message(context, EINVAL, "cms_signdata_create called with no certificates");
return EINVAL;
}
/* start creating PKCS7 data */
if ((p7 = PKCS7_new()) == NULL)
goto cleanup;
p7->type = OBJ_nid2obj(NID_pkcs7_signed);
if ((p7s = PKCS7_SIGNED_new()) == NULL)
goto cleanup;
p7->d.sign = p7s;
if (!ASN1_INTEGER_set(p7s->version, 3))
goto cleanup;
/* create a cert chain that has at least the signer's certificate */
if ((cert_stack = sk_X509_new_null()) == NULL)
goto cleanup;
cert = sk_X509_value(id_cryptoctx->my_certs, id_cryptoctx->cert_index);
if (!include_certchain) {
pkiDebug("only including signer's certificate\n");
sk_X509_push(cert_stack, X509_dup(cert));
} else {
/* create a cert chain */
X509_STORE *certstore = NULL;
X509_STORE_CTX certctx;
STACK_OF(X509) *certstack = NULL;
char buf[DN_BUF_LEN];
unsigned int i = 0, size = 0;
if ((certstore = X509_STORE_new()) == NULL)
goto cleanup;
pkiDebug("building certificate chain\n");
X509_STORE_set_verify_cb_func(certstore, openssl_callback);
X509_STORE_CTX_init(&certctx, certstore, cert,
id_cryptoctx->intermediateCAs);
X509_STORE_CTX_trusted_stack(&certctx, id_cryptoctx->trustedCAs);
if (!X509_verify_cert(&certctx)) {
pkiDebug("failed to create a certificate chain: %s\n",
X509_verify_cert_error_string(X509_STORE_CTX_get_error(&certctx)));
if (!sk_X509_num(id_cryptoctx->trustedCAs))
pkiDebug("No trusted CAs found. Check your X509_anchors\n");
goto cleanup;
}
certstack = X509_STORE_CTX_get1_chain(&certctx);
size = sk_X509_num(certstack);
pkiDebug("size of certificate chain = %d\n", size);
for(i = 0; i < size - 1; i++) {
X509 *x = sk_X509_value(certstack, i);
X509_NAME_oneline(X509_get_subject_name(x), buf, sizeof(buf));
pkiDebug("cert #%d: %s\n", i, buf);
sk_X509_push(cert_stack, X509_dup(x));
}
X509_STORE_CTX_cleanup(&certctx);
X509_STORE_free(certstore);
sk_X509_pop_free(certstack, X509_free);
}
p7s->cert = cert_stack;
/* fill-in PKCS7_SIGNER_INFO */
if ((p7si = PKCS7_SIGNER_INFO_new()) == NULL)
goto cleanup;
if (!ASN1_INTEGER_set(p7si->version, 1))
goto cleanup;
if (!X509_NAME_set(&p7si->issuer_and_serial->issuer,
X509_get_issuer_name(cert)))
goto cleanup;
/* because ASN1_INTEGER_set is used to set a 'long' we will do
* things the ugly way. */
M_ASN1_INTEGER_free(p7si->issuer_and_serial->serial);
if (!(p7si->issuer_and_serial->serial =
M_ASN1_INTEGER_dup(X509_get_serialNumber(cert))))
goto cleanup;
/* will not fill-out EVP_PKEY because it's on the smartcard */
/* Set digest algs */
p7si->digest_alg->algorithm = OBJ_nid2obj(NID_sha1);
if (p7si->digest_alg->parameter != NULL)
ASN1_TYPE_free(p7si->digest_alg->parameter);
if ((p7si->digest_alg->parameter = ASN1_TYPE_new()) == NULL)
goto cleanup;
p7si->digest_alg->parameter->type = V_ASN1_NULL;
/* Set sig algs */
if (p7si->digest_enc_alg->parameter != NULL)
ASN1_TYPE_free(p7si->digest_enc_alg->parameter);
p7si->digest_enc_alg->algorithm = OBJ_nid2obj(NID_sha1WithRSAEncryption);
if (!(p7si->digest_enc_alg->parameter = ASN1_TYPE_new()))
goto cleanup;
p7si->digest_enc_alg->parameter->type = V_ASN1_NULL;
/* pick the correct oid for the eContentInfo */
oid = pkinit_pkcs7type2oid(plg_cryptoctx, cms_msg_type);
if (oid == NULL)
goto cleanup;
if (cms_msg_type == CMS_SIGN_DRAFT9) {
/* don't include signed attributes for pa-type 15 request */
abuf = data;
alen = data_len;
} else {
/* add signed attributes */
/* compute sha1 digest over the EncapsulatedContentInfo */
EVP_MD_CTX_init(&ctx);
EVP_DigestInit_ex(&ctx, EVP_sha1(), NULL);
EVP_DigestUpdate(&ctx, data, data_len);
md_tmp = EVP_MD_CTX_md(&ctx);
EVP_DigestFinal_ex(&ctx, md_data, &md_len);
/* create a message digest attr */
digest_attr = ASN1_OCTET_STRING_new();
ASN1_OCTET_STRING_set(digest_attr, md_data, (int)md_len);
PKCS7_add_signed_attribute(p7si, NID_pkcs9_messageDigest,
V_ASN1_OCTET_STRING, (char *) digest_attr);
/* create a content-type attr */
PKCS7_add_signed_attribute(p7si, NID_pkcs9_contentType,
V_ASN1_OBJECT, oid);
/* create the signature over signed attributes. get DER encoded value */
/* This is the place where smartcard signature needs to be calculated */
sk = p7si->auth_attr;
alen = ASN1_item_i2d((ASN1_VALUE *) sk, &abuf,
ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
if (abuf == NULL)
goto cleanup2;
}
#ifndef WITHOUT_PKCS11
/* Some tokens can only do RSAEncryption without sha1 hash */
/* to compute sha1WithRSAEncryption, encode the algorithm ID for the hash
* function and the hash value into an ASN.1 value of type DigestInfo
* DigestInfo::=SEQUENCE {
* digestAlgorithm AlgorithmIdentifier,
* digest OCTET STRING }
*/
if (id_cryptoctx->pkcs11_method == 1 &&
id_cryptoctx->mech == CKM_RSA_PKCS) {
pkiDebug("mech = CKM_RSA_PKCS\n");
EVP_MD_CTX_init(&ctx2);
/* if this is not draft9 request, include digest signed attribute */
if (cms_msg_type != CMS_SIGN_DRAFT9)
EVP_DigestInit_ex(&ctx2, md_tmp, NULL);
else
EVP_DigestInit_ex(&ctx2, EVP_sha1(), NULL);
EVP_DigestUpdate(&ctx2, abuf, alen);
EVP_DigestFinal_ex(&ctx2, md_data2, &md_len2);
alg = X509_ALGOR_new();
if (alg == NULL)
goto cleanup2;
alg->algorithm = OBJ_nid2obj(NID_sha1);
alg->parameter = NULL;
alg_len = i2d_X509_ALGOR(alg, NULL);
alg_buf = malloc(alg_len);
if (alg_buf == NULL)
goto cleanup2;
digest = ASN1_OCTET_STRING_new();
if (digest == NULL)
goto cleanup2;
ASN1_OCTET_STRING_set(digest, md_data2, (int)md_len2);
digest_len = i2d_ASN1_OCTET_STRING(digest, NULL);
digest_buf = malloc(digest_len);
if (digest_buf == NULL)
goto cleanup2;
digestInfo_len = ASN1_object_size(1, (int)(alg_len + digest_len),
V_ASN1_SEQUENCE);
y = digestInfo_buf = malloc(digestInfo_len);
if (digestInfo_buf == NULL)
goto cleanup2;
ASN1_put_object(&y, 1, (int)(alg_len + digest_len), V_ASN1_SEQUENCE,
V_ASN1_UNIVERSAL);