fix error handling in random.windows if acquiring the crypto context fails

basis/random/windows/windows.factor

@@ -1,6 +1,7 @@
-USING: accessors alien.c-types byte-arrays continuations
-kernel windows.advapi32 init namespaces random destructors
-locals windows.errors ;
+USING: accessors alien.c-types byte-arrays
+combinators.short-circuit continuations destructors init kernel
+locals namespaces random windows.advapi32 windows.errors
+windows.kernel32 ;
 IN: random.windows
 
 TUPLE: windows-rng provider type ;
@@ -12,22 +13,37 @@ C: <windows-crypto-context> windows-crypto-context
 M: windows-crypto-context dispose ( tuple -- )
     handle>> 0 CryptReleaseContext win32-error=0/f ;
 
-: factor-crypto-container ( -- string ) "FactorCryptoContainer" ; inline
+CONSTANT: factor-crypto-container "FactorCryptoContainer"
 
-:: (acquire-crypto-context) ( provider type flags -- handle )
-    [let | handle [ "HCRYPTPROV" <c-object> ] |
-        handle
-        factor-crypto-container
-        provider
-        type
-        flags
-        CryptAcquireContextW win32-error=0/f
-        handle *void* ] ;
+:: (acquire-crypto-context) ( provider type flags -- handle ret )
+    "HCRYPTPROV" <c-object> :> handle
+    handle
+    factor-crypto-container
+    provider
+    type
+    flags
+    CryptAcquireContextW handle swap ;
 
 : acquire-crypto-context ( provider type -- handle )
-    [ 0 (acquire-crypto-context) ]
-    [ drop CRYPT_NEWKEYSET (acquire-crypto-context) ] recover ;
+    0 (acquire-crypto-context)
+    0 = [
+        GetLastError NTE_BAD_KEYSET =
+        [ drop f ] [ win32-error-string throw ] if
+    ] [
+        *void*
+    ] if ;
 
+: create-crypto-context ( provider type -- handle )
+    CRYPT_NEWKEYSET (acquire-crypto-context) win32-error=0/f *void* ;
+
+ERROR: acquire-crypto-context-failed provider type ;
+
+: attempt-crypto-context ( provider type -- handle )
+    {
+        [ acquire-crypto-context ] 
+        [ create-crypto-context ] 
+        [ acquire-crypto-context-failed ]
+    } 2|| ;
 
 : windows-crypto-context ( provider type -- context )
     acquire-crypto-context <windows-crypto-context> ;

basis/windows/advapi32/advapi32.factor

@@ -291,6 +291,40 @@ CONSTANT: SE_GROUP_ENABLED 4
 CONSTANT: SE_GROUP_OWNER 8
 CONSTANT: SE_GROUP_LOGON_ID -1073741824
 
+CONSTANT: NTE_BAD_UID HEX: 80090001
+CONSTANT: NTE_BAD_HASH HEX: 80090002
+CONSTANT: NTE_BAD_KEY HEX: 80090003
+CONSTANT: NTE_BAD_LEN HEX: 80090004
+CONSTANT: NTE_BAD_DATA HEX: 80090005
+CONSTANT: NTE_BAD_SIGNATURE HEX: 80090006
+CONSTANT: NTE_BAD_VER HEX: 80090007
+CONSTANT: NTE_BAD_ALGID HEX: 80090008
+CONSTANT: NTE_BAD_FLAGS HEX: 80090009
+CONSTANT: NTE_BAD_TYPE HEX: 8009000A
+CONSTANT: NTE_BAD_KEY_STATE HEX: 8009000B
+CONSTANT: NTE_BAD_HASH_STATE HEX: 8009000C
+CONSTANT: NTE_NO_KEY HEX: 8009000D
+CONSTANT: NTE_NO_MEMORY HEX: 8009000E
+CONSTANT: NTE_EXISTS HEX: 8009000F
+CONSTANT: NTE_PERM HEX: 80090010
+CONSTANT: NTE_NOT_FOUND HEX: 80090011
+CONSTANT: NTE_DOUBLE_ENCRYPT HEX: 80090012
+CONSTANT: NTE_BAD_PROVIDER HEX: 80090013
+CONSTANT: NTE_BAD_PROV_TYPE HEX: 80090014
+CONSTANT: NTE_BAD_PUBLIC_KEY HEX: 80090015
+CONSTANT: NTE_BAD_KEYSET HEX: 80090016
+CONSTANT: NTE_PROV_TYPE_NOT_DEF HEX: 80090017
+CONSTANT: NTE_PROV_TYPE_ENTRY_BAD HEX: 80090018
+CONSTANT: NTE_KEYSET_NOT_DEF HEX: 80090019
+CONSTANT: NTE_KEYSET_ENTRY_BAD HEX: 8009001A
+CONSTANT: NTE_PROV_TYPE_NO_MATCH HEX: 8009001B
+CONSTANT: NTE_SIGNATURE_FILE_BAD HEX: 8009001C
+CONSTANT: NTE_PROVIDER_DLL_FAIL HEX: 8009001D
+CONSTANT: NTE_PROV_DLL_NOT_FOUND HEX: 8009001E
+CONSTANT: NTE_BAD_KEYSET_PARAM HEX: 8009001F
+CONSTANT: NTE_FAIL HEX: 80090020
+CONSTANT: NTE_SYS_ERR HEX: 80090021
+
 ! SID is a variable length structure
 TYPEDEF: void* PSID