Add preliminary SSL client auth callback to CryptoAPI ENGINE.
authorDr. Stephen Henson <steve@openssl.org>
Tue, 3 Jun 2008 10:27:39 +0000 (10:27 +0000)
committerDr. Stephen Henson <steve@openssl.org>
Tue, 3 Jun 2008 10:27:39 +0000 (10:27 +0000)
engines/e_capi.c
engines/e_capi_err.c
engines/e_capi_err.h

index 64ce632..a976883 100644 (file)
@@ -54,6 +54,8 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <windows.h>
+#include <wincrypt.h>
 #include <openssl/crypto.h>
 #include <openssl/buffer.h>
 #include <openssl/engine.h>
@@ -68,8 +70,6 @@
 #define _WIN32_WINNT 0x400
 #endif
 
-#include <windows.h>
-#include <wincrypt.h>
 
 #include "e_capi_err.h"
 #include "e_capi_err.c"
@@ -108,6 +108,10 @@ static int capi_rsa_free(RSA *rsa);
 static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
                                                        DSA *dsa);
 static int capi_dsa_free(DSA *dsa);
+
+static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
+       STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
+       STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data);
        
 /* This structure contains CAPI ENGINE specific data:
  * it contains various global options and affects how
@@ -126,6 +130,7 @@ struct CAPI_CTX_st {
        DWORD csptype;
        /* Certificate store name to use */
        LPTSTR storename;
+       LPTSTR ssl_client_store;
 
 /* Lookup string meanings in load_private_key */
 /* Substring of subject: uses "storename" */
@@ -158,12 +163,12 @@ static void capi_ctx_free(CAPI_CTX *ctx);
 static int capi_ctx_set_provname(CAPI_CTX *ctx, LPSTR pname, DWORD type, int check);
 static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx);
 
-#define CAPI_CMD_LIST_CERTS                    ENGINE_CMD_BASE
+#define CAPI_CMD_LIST_CERTS            ENGINE_CMD_BASE
 #define CAPI_CMD_LOOKUP_CERT           (ENGINE_CMD_BASE + 1)
 #define CAPI_CMD_DEBUG_LEVEL           (ENGINE_CMD_BASE + 2)
-#define CAPI_CMD_DEBUG_FILE                    (ENGINE_CMD_BASE + 3)
-#define CAPI_CMD_KEYTYPE                       (ENGINE_CMD_BASE + 4)
-#define CAPI_CMD_LIST_CSPS                     (ENGINE_CMD_BASE + 5)
+#define CAPI_CMD_DEBUG_FILE            (ENGINE_CMD_BASE + 3)
+#define CAPI_CMD_KEYTYPE               (ENGINE_CMD_BASE + 4)
+#define CAPI_CMD_LIST_CSPS             (ENGINE_CMD_BASE + 5)
 #define CAPI_CMD_SET_CSP_IDX           (ENGINE_CMD_BASE + 6)
 #define CAPI_CMD_SET_CSP_NAME          (ENGINE_CMD_BASE + 7)
 #define CAPI_CMD_SET_CSP_TYPE          (ENGINE_CMD_BASE + 8)
@@ -428,6 +433,8 @@ static int bind_capi(ENGINE *e)
                || !ENGINE_set_RSA(e, &capi_rsa_method)
                || !ENGINE_set_DSA(e, &capi_dsa_method)
                || !ENGINE_set_load_privkey_function(e, capi_load_privkey)
+               || !ENGINE_set_load_ssl_client_cert_function(e,
+                                               capi_load_ssl_client_cert)
                || !ENGINE_set_cmd_defns(e, capi_cmd_defns)
                || !ENGINE_set_ctrl_function(e, capi_ctrl))
                        return 0;
@@ -494,34 +501,19 @@ static int lend_tobn(BIGNUM *bn, unsigned char *bin, int binlen)
        return 1;
        }
 
-static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
-       UI_METHOD *ui_method, void *callback_data)
+/* Given a CAPI_KEY get an EVP_PKEY structure */
+
+static EVP_PKEY *capi_get_pkey(ENGINE *eng, CAPI_KEY *key)
        {
-       EVP_PKEY *ret = NULL;
-       CAPI_CTX *ctx;
-       CAPI_KEY *key;
        unsigned char *pubkey = NULL;
        DWORD len;
        BLOBHEADER *bh;
        RSA *rkey = NULL;
        DSA *dkey = NULL;
-       ctx = ENGINE_get_ex_data(eng, capi_idx);
-
-       if (!ctx)
-               {
-               CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_CANT_FIND_CAPI_CONTEXT);
-               return NULL;
-               }
-
-       key = capi_find_key(ctx, key_id);
-
-       if (!key)
-               return NULL;
-
-       len = 0;
+       EVP_PKEY *ret = NULL;
        if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, NULL, &len))
                {
-               CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_PUBKEY_EXPORT_LENGTH_ERROR);
+               CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_LENGTH_ERROR);
                capi_addlasterror();
                return NULL;
                }
@@ -533,7 +525,7 @@ static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
 
        if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, pubkey, &len))
                {
-               CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_PUBKEY_EXPORT_ERROR);
+               CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_ERROR);
                capi_addlasterror();
                goto err;
                }
@@ -541,7 +533,7 @@ static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
        bh = (BLOBHEADER *)pubkey;
        if (bh->bType != PUBLICKEYBLOB)
                {
-               CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_INVALID_PUBLIC_KEY_BLOB);
+               CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_PUBLIC_KEY_BLOB);
                goto err;
                }
        if (bh->aiKeyAlg == CALG_RSA_SIGN || bh->aiKeyAlg == CALG_RSA_KEYX)
@@ -554,7 +546,7 @@ static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
                        {
                        char magstr[10];
                        BIO_snprintf(magstr, 10, "%lx", rp->magic);
-                       CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_INVALID_RSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
+                       CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_RSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
                        ERR_add_error_data(2, "magic=0x", magstr);
                        goto err;
                        }
@@ -595,7 +587,7 @@ static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
                        {
                        char magstr[10];
                        BIO_snprintf(magstr, 10, "%lx", dp->magic);
-                       CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_INVALID_DSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
+                       CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_DSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
                        ERR_add_error_data(2, "magic=0x", magstr);
                        goto err;
                        }
@@ -635,11 +627,12 @@ static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
                {
                char algstr[10];
                BIO_snprintf(algstr, 10, "%lx", bh->aiKeyAlg);
-               CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_UNSUPPORTED_PUBLIC_KEY_ALGORITHM);
+               CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_UNSUPPORTED_PUBLIC_KEY_ALGORITHM);
                ERR_add_error_data(2, "aiKeyAlg=0x", algstr);
                goto err;
                }
 
+
        err:
        if (pubkey)
                OPENSSL_free(pubkey);
@@ -649,8 +642,6 @@ static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
                        RSA_free(rkey);
                if (dkey)
                        DSA_free(dkey);
-               if (key)
-                       capi_free_key(key);
                }
 
        return ret;
@@ -661,6 +652,33 @@ memerr:
 
        }
 
+static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
+       UI_METHOD *ui_method, void *callback_data)
+       {
+       CAPI_CTX *ctx;
+       CAPI_KEY *key;
+       EVP_PKEY *ret;
+       ctx = ENGINE_get_ex_data(eng, capi_idx);
+
+       if (!ctx)
+               {
+               CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_CANT_FIND_CAPI_CONTEXT);
+               return NULL;
+               }
+
+       key = capi_find_key(ctx, key_id);
+
+       if (!key)
+               return NULL;
+
+       ret = capi_get_pkey(eng, key);
+
+       if (!ret)
+               capi_free_key(key);
+       return ret;
+
+       }
+
 /* CryptoAPI RSA operations */
 
 int capi_rsa_priv_enc(int flen, const unsigned char *from,
@@ -1401,6 +1419,7 @@ static CAPI_CTX *capi_ctx_new()
        ctx->dump_flags = CAPI_DMP_SUMMARY|CAPI_DMP_FNAME;
        ctx->keytype = AT_KEYEXCHANGE;
        ctx->storename = NULL;
+       ctx->ssl_client_store = NULL;
        ctx->lookup_method = CAPI_LU_SUBSTR;
        ctx->debug_level = 0;
        ctx->debug_file = NULL;
@@ -1418,6 +1437,8 @@ static void capi_ctx_free(CAPI_CTX *ctx)
                OPENSSL_free(ctx->debug_file);
        if (ctx->storename)
                OPENSSL_free(ctx->storename);
+       if (ctx->ssl_client_store)
+               OPENSSL_free(ctx->ssl_client_store);
        OPENSSL_free(ctx);
        }
 
@@ -1450,5 +1471,89 @@ static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx)
        return capi_ctx_set_provname(ctx, pname, type, 0);
        }
 
+static int cert_issuer_match(STACK_OF(X509_NAME) *ca_dn, X509 *x)
+       {
+       int i;
+       X509_NAME *nm;
+       for (i = 0; i < sk_X509_NAME_num(ca_dn); i++)
+               {
+               nm = sk_X509_NAME_value(ca_dn, i);
+               if (!X509_NAME_cmp(nm, X509_get_issuer_name(x)))
+                               return 1;
+               }
+       return 0;
+       }
+
+static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
+       STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
+       STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data)
+       {
+#if 0
+       /* For now just one matching key/cert */
+       STACK_OF(X509) *certs = NULL;
+       STACK_OF(EVP_PKEY) *keys = NULL;
+#endif
+       X509 *x;
+       EVP_PKEY *pk;
+       char *storename;
+       const char *p;
+       int i;
+       HCERTSTORE hstore;
+       PCCERT_CONTEXT cert = NULL;
+       CAPI_CTX *ctx;
+       ctx = ENGINE_get_ex_data(e, capi_idx);
+
+       *pcert = NULL;
+       *pkey = NULL;
+
+       storename = ctx->ssl_client_store;
+       if (!storename)
+               storename = "MY";
+
+       hstore = capi_open_store(ctx, storename);
+       if (!hstore)
+               return 0;
+       /* Enumerate all certificates looking for a match */
+       for(i = 0;!*pcert;i++)
+               {
+               cert = CertEnumCertificatesInStore(hstore, cert);
+               if (!cert)
+                       break;
+               p = cert->pbCertEncoded;
+               x = d2i_X509(NULL, &p, cert->cbCertEncoded);
+               if (!x)
+                       {
+                       CAPI_trace(ctx, "Can't Parse Certificate %d\n", i);
+                       continue;
+                       }
+               if (cert_issuer_match(ca_dn, x))
+                       {
+                       CAPI_KEY *key = capi_get_cert_key(ctx, cert);
+                       if (!key)
+                               continue;
+                       pk = capi_get_pkey(e, key);
+                       if (!pk)
+                               {
+                               capi_free_key(key);
+                               continue;
+                               }
+                       *pcert = x;
+                       *pkey = pk;
+                       }
+               else
+                       X509_free(x);
+
+               }
+
+       if (cert)
+               CertFreeCertificateContext(cert);
+
+       if (*pcert)
+               return 1;
+       else
+               return 0;
+
+       }
+
 #endif
 #endif
index 6ffd5bf..372cfac 100644 (file)
@@ -1,6 +1,6 @@
 /* e_capi_err.c */
 /* ====================================================================
- * Copyright (c) 1999-2008 The OpenSSL Project.  All rights reserved.
+ * Copyright (c) 1999-2007 The OpenSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -76,6 +76,7 @@ static ERR_STRING_DATA CAPI_str_functs[]=
 {ERR_FUNC(CAPI_F_CAPI_CTX_SET_PROVNAME),       "CAPI_CTX_SET_PROVNAME"},
 {ERR_FUNC(CAPI_F_CAPI_DSA_DO_SIGN),    "CAPI_DSA_DO_SIGN"},
 {ERR_FUNC(CAPI_F_CAPI_GET_KEY),        "CAPI_GET_KEY"},
+{ERR_FUNC(CAPI_F_CAPI_GET_PKEY),       "CAPI_GET_PKEY"},
 {ERR_FUNC(CAPI_F_CAPI_GET_PROVNAME),   "CAPI_GET_PROVNAME"},
 {ERR_FUNC(CAPI_F_CAPI_GET_PROV_INFO),  "CAPI_GET_PROV_INFO"},
 {ERR_FUNC(CAPI_F_CAPI_INIT),   "CAPI_INIT"},
index cb80114..e59c1de 100644 (file)
@@ -73,6 +73,7 @@ static void ERR_CAPI_error(int function, int reason, char *file, int line);
 #define CAPI_F_CAPI_CTX_SET_PROVNAME                    102
 #define CAPI_F_CAPI_DSA_DO_SIGN                                 114
 #define CAPI_F_CAPI_GET_KEY                             103
+#define CAPI_F_CAPI_GET_PKEY                            115
 #define CAPI_F_CAPI_GET_PROVNAME                        104
 #define CAPI_F_CAPI_GET_PROV_INFO                       105
 #define CAPI_F_CAPI_INIT                                106