File shim-mokmanager-support-crypt-hash-method.patch of Package shim

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File shim-mokmanager-support-crypt-hash-method.patch of Package shim (Revision 465018c63370e11b421f11d957289224)

Currently displaying revision 465018c63370e11b421f11d957289224 , Show latest

From d046361f872467ed4a8481968ffb089596f6ae30 Mon Sep 17 00:00:00 2001
From: Gary Ching-Pang Lin <glin@suse.com>
Date: Wed, 23 Jan 2013 18:33:01 +0800
Subject: [PATCH 1/6] Adopt the crypt_r() hash style

1. This commit implements the sha256-based hash method used in crypt_r()
   in glibc.

2. The password length now is allowed to be 1 to 256 characters.

3. The size of password hash structure is changed and the extra space
   is reserved for the future use.
---
 Makefile        |    6 +--
 MokManager.c    |   88 +++++++++++++++++++--------------------
 PasswordCrypt.c |  124 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 PasswordCrypt.h |   26 ++++++++++++
 PasswordHash.h  |   23 -----------
 5 files changed, 196 insertions(+), 71 deletions(-)
 create mode 100644 PasswordCrypt.c
 create mode 100644 PasswordCrypt.h
 delete mode 100644 PasswordHash.h

diff --git a/Makefile b/Makefile
index 412eba5..321c3f5 100644
--- a/Makefile
+++ b/Makefile
@@ -32,8 +32,8 @@ TARGET	= shim.efi MokManager.efi.signed
 OBJS	= shim.o netboot.o cert.o dbx.o
 KEYS	= shim_cert.h ocsp.* ca.* shim.crt shim.csr shim.p12 shim.pem shim.key
 SOURCES	= shim.c shim.h netboot.c signature.h PeImage.h
-MOK_OBJS = MokManager.o
-MOK_SOURCES = MokManager.c shim.h
+MOK_OBJS = MokManager.o PasswordCrypt.o
+MOK_SOURCES = MokManager.c shim.h PasswordCrypt.c PasswordCrypt.h
 
 all: $(TARGET)
 
@@ -65,7 +65,7 @@ dbx.o : dbx.S
 shim.so: $(OBJS) Cryptlib/libcryptlib.a Cryptlib/OpenSSL/libopenssl.a
 	$(LD) -o $@ $(LDFLAGS) $^ $(EFI_LIBS)
 
-MokManager.o: $(SOURCES)
+MokManager.o: $(MOK_SOURCES)
 
 MokManager.so: $(MOK_OBJS) Cryptlib/libcryptlib.a Cryptlib/OpenSSL/libopenssl.a
 	$(LD) -o $@ $(LDFLAGS) $^ $(EFI_LIBS)
diff --git a/MokManager.c b/MokManager.c
index 9c8f32f..6b0e6f3 100644
--- a/MokManager.c
+++ b/MokManager.c
@@ -5,11 +5,11 @@
 #include "shim.h"
 #include "signature.h"
 #include "PeImage.h"
-#include "PasswordHash.h"
+#include "PasswordCrypt.h"
 
-#define PASSWORD_MAX 16
-#define PASSWORD_MIN 8
-#define SB_PASSWORD_LEN 8
+#define PASSWORD_MAX 256
+#define PASSWORD_MIN 1
+#define SB_PASSWORD_LEN 16
 
 #ifndef SHIM_VENDOR
 #define SHIM_VENDOR L"Shim"
@@ -38,7 +38,7 @@ typedef struct {
 typedef struct {
 	UINT32 MokSBState;
 	UINT32 PWLen;
-	CHAR16 Password[PASSWORD_MAX];
+	CHAR16 Password[SB_PASSWORD_LEN];
 } __attribute__ ((packed)) MokSBvar;
 
 static EFI_STATUS get_variable (CHAR16 *name, EFI_GUID guid, UINT32 *attributes,
@@ -597,11 +597,11 @@ done:
 	return status;
 }
 
-static EFI_STATUS match_password (PASSWORD_HASH *pw_hash,
+static EFI_STATUS match_password (PASSWORD_CRYPT *pw_crypt,
 				  void *Data, UINTN DataSize,
 				  UINT8 *auth, CHAR16 *prompt)
 {
-	EFI_STATUS efi_status;
+	EFI_STATUS status;
 	UINT8 hash[SHA256_DIGEST_SIZE];
 	UINT8 *auth_hash;
 	UINT32 auth_size;
@@ -610,14 +610,14 @@ static EFI_STATUS match_password (PASSWORD_HASH *pw_hash,
 	UINT8 fail_count = 0;
 	int i;
 
-	if (pw_hash) {
+	if (pw_crypt) {
 		/*
-		 * Only support sha256 now and ignore iter_count
+		 * Only support sha256 now
 		 */
-		if(pw_hash->method != SHA256_BASED)
+		if(pw_crypt->method != SHA256_BASED)
 			return EFI_INVALID_PARAMETER;
-		auth_hash = pw_hash->hash;
-		/* FIXME assign auth_size according to pw_hash->method */
+		auth_hash = pw_crypt->hash;
+		/* FIXME assign auth_size according to pw_crypt->method */
 		auth_size = SHA256_DIGEST_SIZE;
 	} else if (auth) {
 		auth_hash = auth;
@@ -643,22 +643,20 @@ static EFI_STATUS match_password (PASSWORD_HASH *pw_hash,
 		/*
 		 * Compute password hash
 		 */
-		if (pw_hash) {
+		if (pw_crypt) {
 			char pw_ascii[PASSWORD_MAX];
 			for (i = 0; i < pw_length; i++)
 				pw_ascii[i] = (char)password[i];
 
-			/* FIXME calculate a proper salt_size */
-			efi_status = compute_pw_hash(pw_hash->salt, (pw_hash->salt_size)/8,
-						     (UINT8 *)pw_ascii, pw_length, hash);
+			status = password_crypt(pw_ascii, pw_length, pw_crypt, hash);
 		} else {
 			/*
 			 * For backward compatibility
 			 */
-			efi_status = compute_pw_hash(Data, DataSize, (UINT8 *)password,
-						     pw_length * sizeof(CHAR16), hash);
+			status = compute_pw_hash(Data, DataSize, (UINT8 *)password,
+						 pw_length * sizeof(CHAR16), hash);
 		}
-		if (efi_status != EFI_SUCCESS) {
+		if (status != EFI_SUCCESS) {
 			Print(L"Unable to generate password hash\n");
 			fail_count++;
 			continue;
@@ -683,8 +681,8 @@ static EFI_STATUS store_keys (void *MokNew, UINTN MokNewSize, int authenticate)
 {
 	EFI_GUID shim_lock_guid = SHIM_LOCK_GUID;
 	EFI_STATUS efi_status;
-	UINT8 auth[PASSWORD_HASH_SIZE];
-	UINTN auth_size = PASSWORD_HASH_SIZE;
+	UINT8 auth[PASSWORD_CRYPT_SIZE];
+	UINTN auth_size = PASSWORD_CRYPT_SIZE;
 	UINT32 attributes;
 
 	if (authenticate) {
@@ -694,13 +692,13 @@ static EFI_STATUS store_keys (void *MokNew, UINTN MokNewSize, int authenticate)
 
 		if (efi_status != EFI_SUCCESS ||
 		    (auth_size != SHA256_DIGEST_SIZE &&
-		     auth_size != PASSWORD_HASH_SIZE)) {
+		     auth_size != PASSWORD_CRYPT_SIZE)) {
 			Print(L"Failed to get MokAuth %d\n", efi_status);
 			return efi_status;
 		}
 
-		if (auth_size == PASSWORD_HASH_SIZE) {
-			efi_status = match_password((PASSWORD_HASH *)auth,
+		if (auth_size == PASSWORD_CRYPT_SIZE) {
+			efi_status = match_password((PASSWORD_CRYPT *)auth,
 						    NULL, 0, NULL, NULL);
 		} else {
 			efi_status = match_password(NULL, MokNew, MokNewSize,
@@ -883,8 +881,8 @@ static EFI_STATUS delete_keys (void *MokDel, UINTN MokDelSize)
 {
 	EFI_GUID shim_lock_guid = SHIM_LOCK_GUID;
 	EFI_STATUS efi_status;
-	UINT8 auth[PASSWORD_HASH_SIZE];
-	UINTN auth_size = PASSWORD_HASH_SIZE;
+	UINT8 auth[PASSWORD_CRYPT_SIZE];
+	UINTN auth_size = PASSWORD_CRYPT_SIZE;
 	UINT32 attributes;
 	void *MokListData = NULL;
 	UINTN MokListDataSize = 0;
@@ -897,13 +895,13 @@ static EFI_STATUS delete_keys (void *MokDel, UINTN MokDelSize)
 				       &attributes, &auth_size, auth);
 
 	if (efi_status != EFI_SUCCESS ||
-	    (auth_size != SHA256_DIGEST_SIZE && auth_size != PASSWORD_HASH_SIZE)) {
+	    (auth_size != SHA256_DIGEST_SIZE && auth_size != PASSWORD_CRYPT_SIZE)) {
 		Print(L"Failed to get MokDelAuth %d\n", efi_status);
 		return efi_status;
 	}
 
-	if (auth_size == PASSWORD_HASH_SIZE) {
-		efi_status = match_password((PASSWORD_HASH *)auth, NULL, 0,
+	if (auth_size == PASSWORD_CRYPT_SIZE) {
+		efi_status = match_password((PASSWORD_CRYPT *)auth, NULL, 0,
 					    NULL, NULL);
 	} else {
 		efi_status = match_password(NULL, MokDel, MokDelSize, auth, NULL);
@@ -1099,22 +1097,22 @@ static INTN mok_pw_prompt (void *MokPW, void *data2, void *data3) {
 	EFI_GUID shim_lock_guid = SHIM_LOCK_GUID;
 	EFI_STATUS efi_status;
 	UINTN MokPWSize = (UINTN)data2;
-	UINT8 hash[PASSWORD_HASH_SIZE];
+	UINT8 hash[PASSWORD_CRYPT_SIZE];
 	UINT8 clear = 0;
 	UINT32 length;
 	CHAR16 line[1];
 
-	if (MokPWSize != SHA256_DIGEST_SIZE && MokPWSize != PASSWORD_HASH_SIZE) {
+	if (MokPWSize != SHA256_DIGEST_SIZE && MokPWSize != PASSWORD_CRYPT_SIZE) {
 		Print(L"Invalid MokPW variable contents\n");
 		return -1;
 	}
 
 	uefi_call_wrapper(ST->ConOut->ClearScreen, 1, ST->ConOut);
 
-	SetMem(hash, PASSWORD_HASH_SIZE, 0);
+	SetMem(hash, PASSWORD_CRYPT_SIZE, 0);
 
-	if (MokPWSize == PASSWORD_HASH_SIZE) {
-		if (CompareMem(MokPW, hash, PASSWORD_HASH_SIZE) == 0)
+	if (MokPWSize == PASSWORD_CRYPT_SIZE) {
+		if (CompareMem(MokPW, hash, PASSWORD_CRYPT_SIZE) == 0)
 			clear = 1;
 	} else {
 		if (CompareMem(MokPW, hash, SHA256_DIGEST_SIZE) == 0)
@@ -1136,8 +1134,8 @@ static INTN mok_pw_prompt (void *MokPW, void *data2, void *data3) {
 		return 0;
 	}
 
-	if (MokPWSize == PASSWORD_HASH_SIZE) {
-		efi_status = match_password((PASSWORD_HASH *)MokPW, NULL, 0,
+	if (MokPWSize == PASSWORD_CRYPT_SIZE) {
+		efi_status = match_password((PASSWORD_CRYPT *)MokPW, NULL, 0,
 					    NULL, L"Confirm MOK passphrase: ");
 	} else {
 		efi_status = match_password(NULL, NULL, 0, MokPW,
@@ -1754,8 +1752,8 @@ static BOOLEAN verify_pw(void)
 {
 	EFI_GUID shim_lock_guid = SHIM_LOCK_GUID;
 	EFI_STATUS efi_status;
-	UINT8 pwhash[PASSWORD_HASH_SIZE];
-	UINTN size = PASSWORD_HASH_SIZE;
+	UINT8 pwhash[PASSWORD_CRYPT_SIZE];
+	UINTN size = PASSWORD_CRYPT_SIZE;
 	UINT32 attributes;
 
 	efi_status = uefi_call_wrapper(RT->GetVariable, 5, L"MokPWStore",
@@ -1768,7 +1766,7 @@ static BOOLEAN verify_pw(void)
 	 * purely because of a failure to read the variable
 	 */
 	if (efi_status != EFI_SUCCESS ||
-	    (size != SHA256_DIGEST_SIZE && size != PASSWORD_HASH_SIZE))
+	    (size != SHA256_DIGEST_SIZE && size != PASSWORD_CRYPT_SIZE))
 		return TRUE;
 
 	if (attributes & EFI_VARIABLE_RUNTIME_ACCESS)
@@ -1776,8 +1774,8 @@ static BOOLEAN verify_pw(void)
 
 	uefi_call_wrapper(ST->ConOut->ClearScreen, 1, ST->ConOut);
 
-	if (size == PASSWORD_HASH_SIZE) {
-		efi_status = match_password((PASSWORD_HASH *)pwhash, NULL, 0,
+	if (size == PASSWORD_CRYPT_SIZE) {
+		efi_status = match_password((PASSWORD_CRYPT *)pwhash, NULL, 0,
 					    NULL, L"Enter MOK password: ");
 	} else {
 		efi_status = match_password(NULL, NULL, 0, pwhash,
@@ -1803,8 +1801,8 @@ static EFI_STATUS enter_mok_menu(EFI_HANDLE image_handle,
 	UINTN menucount = 3, i = 0;
 	EFI_STATUS efi_status;
 	EFI_GUID shim_lock_guid = SHIM_LOCK_GUID;
-	UINT8 auth[PASSWORD_HASH_SIZE];
-	UINTN auth_size = PASSWORD_HASH_SIZE;
+	UINT8 auth[PASSWORD_CRYPT_SIZE];
+	UINTN auth_size = PASSWORD_CRYPT_SIZE;
 	UINT32 attributes;
 
 	if (verify_pw() == FALSE)
@@ -1815,7 +1813,7 @@ static EFI_STATUS enter_mok_menu(EFI_HANDLE image_handle,
 					       &attributes, &auth_size, auth);
 
 	if ((efi_status == EFI_SUCCESS) &&
-	    (auth_size == SHA256_DIGEST_SIZE || auth_size == PASSWORD_HASH_SIZE))
+	    (auth_size == SHA256_DIGEST_SIZE || auth_size == PASSWORD_CRYPT_SIZE))
 		MokAuth = 1;
 
 	efi_status = uefi_call_wrapper(RT->GetVariable, 5, L"MokDelAuth",
@@ -1823,7 +1821,7 @@ static EFI_STATUS enter_mok_menu(EFI_HANDLE image_handle,
 					       &attributes, &auth_size, auth);
 
 	if ((efi_status == EFI_SUCCESS) &&
-	   (auth_size == SHA256_DIGEST_SIZE || auth_size == PASSWORD_HASH_SIZE))
+	   (auth_size == SHA256_DIGEST_SIZE || auth_size == PASSWORD_CRYPT_SIZE))
 		MokDelAuth = 1;
 
 	if (MokNew || MokAuth)
diff --git a/PasswordCrypt.c b/PasswordCrypt.c
new file mode 100644
index 0000000..bde23ed
--- /dev/null
+++ b/PasswordCrypt.c
@@ -0,0 +1,124 @@
+#include <efi.h>
+#include <efilib.h>
+#include <Library/BaseCryptLib.h>
+#include <openssl/sha.h>
+#include "PasswordCrypt.h"
+
+static EFI_STATUS sha256_crypt (const char *key,  UINT32 key_len,
+				const char *salt, UINT32 salt_size,
+				const UINT32 rounds, UINT8 *hash)
+{
+	SHA256_CTX ctx, alt_ctx;
+	UINT8 alt_result[SHA256_DIGEST_SIZE];
+	UINT8 tmp_result[SHA256_DIGEST_SIZE];
+	UINT8 *cp, *p_bytes, *s_bytes;
+	UINTN cnt;
+
+	SHA256_Init(&ctx);
+	SHA256_Update(&ctx, key, key_len);
+	SHA256_Update(&ctx, salt, salt_size);
+
+	SHA256_Init(&alt_ctx);
+	SHA256_Update(&alt_ctx, key, key_len);
+	SHA256_Update(&alt_ctx, salt, salt_size);
+	SHA256_Update(&alt_ctx, key, key_len);
+	SHA256_Final(alt_result, &alt_ctx);
+
+	for (cnt = key_len; cnt > 32; cnt -= 32)
+		SHA256_Update(&ctx, alt_result, 32);
+	SHA256_Update(&ctx, alt_result, cnt);
+
+	for (cnt = key_len; cnt > 0; cnt >>= 1) {
+		if ((cnt & 1) != 0) {
+			SHA256_Update(&ctx, alt_result, 32);
+		} else {
+			SHA256_Update(&ctx, key, key_len);
+		}
+	}
+	SHA256_Final(alt_result, &ctx);
+
+	SHA256_Init(&alt_ctx);
+	for (cnt = 0; cnt < key_len; ++cnt)
+		SHA256_Update(&alt_ctx, key, key_len);
+	SHA256_Final(tmp_result, &alt_ctx);
+
+	cp = p_bytes = AllocatePool(key_len);
+	for (cnt = key_len; cnt >= 32; cnt -= 32) {
+		CopyMem(cp, tmp_result, 32);
+		cp += 32;
+	}
+	CopyMem(cp, tmp_result, cnt);
+
+	SHA256_Init(&alt_ctx);
+	for (cnt = 0; cnt < 16 + alt_result[0]; ++cnt)
+		SHA256_Update(&alt_ctx, salt, salt_size);
+	SHA256_Final(tmp_result, &alt_ctx);
+
+	cp = s_bytes = AllocatePool(salt_size);
+	for (cnt = salt_size; cnt >= 32; cnt -= 32) {
+		CopyMem(cp, tmp_result, 32);
+		cp += 32;
+	}
+	CopyMem(cp, tmp_result, cnt);
+
+	for (cnt = 0; cnt < rounds; ++cnt) {
+		SHA256_Init(&ctx);
+
+		if ((cnt & 1) != 0)
+			SHA256_Update(&ctx, p_bytes, key_len);
+		else
+			SHA256_Update(&ctx, alt_result, 32);
+
+		if (cnt % 3 != 0)
+			SHA256_Update(&ctx, s_bytes, salt_size);
+
+		if (cnt % 7 != 0)
+			SHA256_Update(&ctx, p_bytes, key_len);
+
+		if ((cnt & 1) != 0)
+			SHA256_Update(&ctx, alt_result, 32);
+		else
+			SHA256_Update(&ctx, p_bytes, key_len);
+
+		SHA256_Final(alt_result, &ctx);
+	}
+
+	CopyMem(hash, alt_result, SHA256_DIGEST_SIZE);
+
+	FreePool(p_bytes);
+	FreePool(s_bytes);
+
+	return EFI_SUCCESS;
+}
+
+EFI_STATUS password_crypt (const char *password, UINT32 pw_length,
+			   const PASSWORD_CRYPT *pw_crypt, UINT8 *hash)
+{
+	EFI_STATUS status;
+
+	if (!pw_crypt)
+		return EFI_INVALID_PARAMETER;
+
+	switch (pw_crypt->method) {
+	case TRANDITIONAL_DES:
+	case EXTEND_BSDI_DES:
+	case MD5_BASED:
+		/* TODO unsupported */
+		status = EFI_UNSUPPORTED;
+		break;
+	case SHA256_BASED:
+		status = sha256_crypt(password, pw_length, (char *)pw_crypt->salt,
+				      pw_crypt->salt_size, pw_crypt->iter_count,
+				      hash);
+		break;
+	case SHA512_BASED:
+	case BLOWFISH_BASED:
+		/* TODO unsupported */
+		status = EFI_UNSUPPORTED;
+		break;
+	default:
+		return EFI_INVALID_PARAMETER;
+	}
+
+	return status;
+}
diff --git a/PasswordCrypt.h b/PasswordCrypt.h
new file mode 100644
index 0000000..c9e377a
--- /dev/null
+++ b/PasswordCrypt.h
@@ -0,0 +1,26 @@
+#ifndef __PASSWORD_CRYPT_H__
+#define __PASSWORD_CRYPT_H__
+
+enum HashMethod {
+	TRANDITIONAL_DES = 0,
+	EXTEND_BSDI_DES,
+	MD5_BASED,
+	SHA256_BASED,
+	SHA512_BASED,
+	BLOWFISH_BASED
+};
+
+typedef struct {
+	UINT16 method;
+	UINT64 iter_count;
+	UINT16 salt_size;
+	UINT8  salt[32];
+	UINT8  hash[128];
+} __attribute__ ((packed)) PASSWORD_CRYPT;
+
+#define PASSWORD_CRYPT_SIZE sizeof(PASSWORD_CRYPT)
+
+EFI_STATUS password_crypt (const char *password, UINT32 pw_length,
+			   const PASSWORD_CRYPT *pw_hash, UINT8 *hash);
+
+#endif /* __PASSWORD_CRYPT_H__ */
diff --git a/PasswordHash.h b/PasswordHash.h
deleted file mode 100644
index 70ee441..0000000
--- a/PasswordHash.h
+++ /dev/null
@@ -1,23 +0,0 @@
-#ifndef __PASSWORD_HASH_H__
-#define __PASSWORD_HASH_H__
-
-#define PASSWORD_HASH_SIZE 88
-
-enum HashMethod {
-	Tranditional_DES = 0,
-	Extend_BSDI_DES,
-	MD5_BASED,
-	SHA256_BASED,
-	SHA512_BASED,
-	BLOWFISH_BASED
-};
-
-typedef struct {
-	UINT16 method;
-	UINT32 iter_count;
-	UINT16 salt_size;
-	UINT8  salt[16];
-	UINT8  hash[64];
-} __attribute__ ((packed)) PASSWORD_HASH;
-
-#endif /* __PASSWORD_HASH_H__ */
-- 
1.7.10.4

From 1e3f6fa2e149980d337365d55728da74ed76fe1f Mon Sep 17 00:00:00 2001
From: Gary Ching-Pang Lin <glin@suse.com>
Date: Thu, 24 Jan 2013 18:24:49 +0800
Subject: [PATCH 2/6] Support SHA512-based crypt() hash

---
 Cryptlib/OpenSSL/Makefile |    2 +-
 MokManager.c              |   12 ++---
 PasswordCrypt.c           |  114 +++++++++++++++++++++++++++++++++++++++++++++
 PasswordCrypt.h           |    1 +
 4 files changed, 120 insertions(+), 9 deletions(-)

diff --git a/Cryptlib/OpenSSL/Makefile b/Cryptlib/OpenSSL/Makefile
index 7fde382..c44c008 100644
--- a/Cryptlib/OpenSSL/Makefile
+++ b/Cryptlib/OpenSSL/Makefile
@@ -10,7 +10,7 @@ LIB_GCC		= $(shell $(CC) -print-libgcc-file-name)
 EFI_LIBS	= -lefi -lgnuefi $(LIB_GCC)
 
 CFLAGS		= -ggdb -O0 -I. -I.. -I../Include/ -Icrypto -fno-stack-protector -fno-strict-aliasing -fpic -fshort-wchar -nostdinc \
-		  -Wall $(EFI_INCLUDES) -DOPENSSL_SYSNAME_UWIN -DOPENSSL_SYS_UEFI -DL_ENDIAN -DSIXTY_FOUR_BIT_LONG -D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE -DOPENSSL_NO_CAMELLIA -DOPENSSL_NO_SEED -DOPENSSL_NO_RC5 -DOPENSSL_NO_MDC2 -DOPENSSL_NO_SOCK -DOPENSSL_NO_CMS -DOPENSSL_NO_JPAKE -DOPENSSL_NO_CAPIENG -DOPENSSL_NO_ERR -DOPENSSL_NO_KRB5 -DOPENSSL_NO_DYNAMIC_ENGINE -DGETPID_IS_MEANINGLESS -DOPENSSL_NO_STDIO -DOPENSSL_NO_FP_API -DOPENSSL_NO_DGRAM -DOPENSSL_NO_SHA0 -DOPENSSL_NO_SHA512 -DOPENSSL_NO_LHASH -DOPENSSL_NO_HW -DOPENSSL_NO_OCSP -DOPENSSL_NO_LOCKING -DOPENSSL_NO_DEPRECATED -DOPENSSL_SMALL_FOOTPRINT -DPEDANTIC -mno-red-zone
+		  -Wall $(EFI_INCLUDES) -DOPENSSL_SYSNAME_UWIN -DOPENSSL_SYS_UEFI -DL_ENDIAN -DSIXTY_FOUR_BIT_LONG -D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE -DOPENSSL_NO_CAMELLIA -DOPENSSL_NO_SEED -DOPENSSL_NO_RC5 -DOPENSSL_NO_MDC2 -DOPENSSL_NO_SOCK -DOPENSSL_NO_CMS -DOPENSSL_NO_JPAKE -DOPENSSL_NO_CAPIENG -DOPENSSL_NO_ERR -DOPENSSL_NO_KRB5 -DOPENSSL_NO_DYNAMIC_ENGINE -DGETPID_IS_MEANINGLESS -DOPENSSL_NO_STDIO -DOPENSSL_NO_FP_API -DOPENSSL_NO_DGRAM -DOPENSSL_NO_SHA0 -DOPENSSL_NO_LHASH -DOPENSSL_NO_HW -DOPENSSL_NO_OCSP -DOPENSSL_NO_LOCKING -DOPENSSL_NO_DEPRECATED -DOPENSSL_SMALL_FOOTPRINT -DPEDANTIC -mno-red-zone
 ifeq ($(ARCH),x86_64)
 	CFLAGS	+= -DEFI_FUNCTION_WRAPPER
 endif
diff --git a/MokManager.c b/MokManager.c
index 6b0e6f3..65465ec 100644
--- a/MokManager.c
+++ b/MokManager.c
@@ -602,7 +602,7 @@ static EFI_STATUS match_password (PASSWORD_CRYPT *pw_crypt,
 				  UINT8 *auth, CHAR16 *prompt)
 {
 	EFI_STATUS status;
-	UINT8 hash[SHA256_DIGEST_SIZE];
+	UINT8 hash[128];
 	UINT8 *auth_hash;
 	UINT32 auth_size;
 	CHAR16 password[PASSWORD_MAX];
@@ -611,14 +611,10 @@ static EFI_STATUS match_password (PASSWORD_CRYPT *pw_crypt,
 	int i;
 
 	if (pw_crypt) {
-		/*
-		 * Only support sha256 now
-		 */
-		if(pw_crypt->method != SHA256_BASED)
-			return EFI_INVALID_PARAMETER;
 		auth_hash = pw_crypt->hash;
-		/* FIXME assign auth_size according to pw_crypt->method */
-		auth_size = SHA256_DIGEST_SIZE;
+		auth_size = get_hash_size (pw_crypt->method);
+		if (auth_size == 0)
+			return EFI_INVALID_PARAMETER;
 	} else if (auth) {
 		auth_hash = auth;
 		auth_size = SHA256_DIGEST_SIZE;
diff --git a/PasswordCrypt.c b/PasswordCrypt.c
index bde23ed..a62512e 100644
--- a/PasswordCrypt.c
+++ b/PasswordCrypt.c
@@ -2,8 +2,30 @@
 #include <efilib.h>
 #include <Library/BaseCryptLib.h>
 #include <openssl/sha.h>
+#include <openssl/md5.h>
 #include "PasswordCrypt.h"
 
+
+UINT16 get_hash_size (const UINT16 method)
+{
+	switch (method) {
+	case TRANDITIONAL_DES:
+		return 64 / 8; /* per "man crypt" */
+	case EXTEND_BSDI_DES:
+		return 64 / 8; /* per "man crypt" */
+	case MD5_BASED:
+		return MD5_DIGEST_LENGTH;
+	case SHA256_BASED:
+		return SHA256_DIGEST_LENGTH;
+	case SHA512_BASED:
+		return SHA512_DIGEST_LENGTH;
+	case BLOWFISH_BASED:
+		return 184 / 8; /* per "man crypt" */
+	}
+
+	return 0;
+}
+
 static EFI_STATUS sha256_crypt (const char *key,  UINT32 key_len,
 				const char *salt, UINT32 salt_size,
 				const UINT32 rounds, UINT8 *hash)
@@ -91,6 +113,94 @@ static EFI_STATUS sha256_crypt (const char *key,  UINT32 key_len,
 	return EFI_SUCCESS;
 }
 
+static EFI_STATUS sha512_crypt (const char *key,  UINT32 key_len,
+				const char *salt, UINT32 salt_size,
+				const UINT32 rounds, UINT8 *hash)
+{
+	SHA512_CTX ctx, alt_ctx;
+	UINT8 alt_result[SHA512_DIGEST_LENGTH];
+	UINT8 tmp_result[SHA512_DIGEST_LENGTH];
+	UINT8 *cp, *p_bytes, *s_bytes;
+	UINTN cnt;
+
+	SHA512_Init(&ctx);
+	SHA512_Update(&ctx, key, key_len);
+	SHA512_Update(&ctx, salt, salt_size);
+
+	SHA512_Init(&alt_ctx);
+	SHA512_Update(&alt_ctx, key, key_len);
+	SHA512_Update(&alt_ctx, salt, salt_size);
+	SHA512_Update(&alt_ctx, key, key_len);
+
+	SHA512_Final(alt_result, &alt_ctx);
+
+	for (cnt = key_len; cnt > 64; cnt -= 64)
+		SHA512_Update(&ctx, alt_result, 64);
+	SHA512_Update(&ctx, alt_result, cnt);
+
+	for (cnt = key_len; cnt > 0; cnt >>= 1) {
+		if ((cnt & 1) != 0) {
+			SHA512_Update(&ctx, alt_result, 64);
+		} else {
+			SHA512_Update(&ctx, key, key_len);
+		}
+	}
+	SHA512_Final(alt_result, &ctx);
+
+	SHA512_Init(&alt_ctx);
+	for (cnt = 0; cnt < key_len; ++cnt)
+		SHA512_Update(&alt_ctx, key, key_len);
+	SHA512_Final(tmp_result, &alt_ctx);
+
+	cp = p_bytes = AllocatePool(key_len);
+	for (cnt = key_len; cnt >= 64; cnt -= 64) {
+		CopyMem(cp, tmp_result, 64);
+		cp += 64;
+	}
+	CopyMem(cp, tmp_result, cnt);
+
+	SHA512_Init(&alt_ctx);
+	for (cnt = 0; cnt < 16 + alt_result[0]; ++cnt)
+		SHA512_Update(&alt_ctx, salt, salt_size);
+	SHA512_Final(tmp_result, &alt_ctx);
+
+	cp = s_bytes = AllocatePool(salt_size);
+	for (cnt = salt_size; cnt >= 64; cnt -= 64) {
+		CopyMem(cp, tmp_result, 64);
+		cp += 64;
+	}
+	CopyMem(cp, tmp_result, cnt);
+
+	for (cnt = 0; cnt < rounds; ++cnt) {
+		SHA512_Init(&ctx);
+
+		if ((cnt & 1) != 0)
+			SHA512_Update(&ctx, p_bytes, key_len);
+		else
+			SHA512_Update(&ctx, alt_result, 64);
+
+		if (cnt % 3 != 0)
+			SHA512_Update(&ctx, s_bytes, salt_size);
+
+		if (cnt % 7 != 0)
+			SHA512_Update(&ctx, p_bytes, key_len);
+
+		if ((cnt & 1) != 0)
+			SHA512_Update(&ctx, alt_result, 64);
+		else
+			SHA512_Update(&ctx, p_bytes, key_len);
+
+		SHA512_Final(alt_result, &ctx);
+	}
+
+	CopyMem(hash, alt_result, SHA512_DIGEST_LENGTH);
+
+	FreePool(p_bytes);
+	FreePool(s_bytes);
+
+	return EFI_SUCCESS;
+}
+
 EFI_STATUS password_crypt (const char *password, UINT32 pw_length,
 			   const PASSWORD_CRYPT *pw_crypt, UINT8 *hash)
 {
@@ -112,6 +222,10 @@ EFI_STATUS password_crypt (const char *password, UINT32 pw_length,
 				      hash);
 		break;
 	case SHA512_BASED:
+		status = sha512_crypt(password, pw_length, (char *)pw_crypt->salt,
+				      pw_crypt->salt_size, pw_crypt->iter_count,
+				      hash);
+		break;
 	case BLOWFISH_BASED:
 		/* TODO unsupported */
 		status = EFI_UNSUPPORTED;
diff --git a/PasswordCrypt.h b/PasswordCrypt.h
index c9e377a..144bf84 100644
--- a/PasswordCrypt.h
+++ b/PasswordCrypt.h
@@ -22,5 +22,6 @@ typedef struct {
 
 EFI_STATUS password_crypt (const char *password, UINT32 pw_length,
 			   const PASSWORD_CRYPT *pw_hash, UINT8 *hash);
+UINT16 get_hash_size (const UINT16 method);
 
 #endif /* __PASSWORD_CRYPT_H__ */
-- 
1.7.10.4

From 4df0fbdeda91a42bad688c88f3cebb313ce99484 Mon Sep 17 00:00:00 2001
From: Gary Ching-Pang Lin <glin@suse.com>
Date: Fri, 25 Jan 2013 18:27:31 +0800
Subject: [PATCH 3/6] Support blowfish-based crypt() hash

---
 Makefile         |    4 +-
 PasswordCrypt.c  |   26 +-
 crypt_blowfish.c |  822 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 crypt_blowfish.h |   22 ++
 4 files changed, 869 insertions(+), 5 deletions(-)
 create mode 100644 crypt_blowfish.c
 create mode 100644 crypt_blowfish.h

diff --git a/Makefile b/Makefile
index 321c3f5..b4916f1 100644
--- a/Makefile
+++ b/Makefile
@@ -32,8 +32,8 @@ TARGET	= shim.efi MokManager.efi.signed
 OBJS	= shim.o netboot.o cert.o dbx.o
 KEYS	= shim_cert.h ocsp.* ca.* shim.crt shim.csr shim.p12 shim.pem shim.key
 SOURCES	= shim.c shim.h netboot.c signature.h PeImage.h
-MOK_OBJS = MokManager.o PasswordCrypt.o
-MOK_SOURCES = MokManager.c shim.h PasswordCrypt.c PasswordCrypt.h
+MOK_OBJS = MokManager.o PasswordCrypt.o crypt_blowfish.o
+MOK_SOURCES = MokManager.c shim.h PasswordCrypt.c PasswordCrypt.h crypt_blowfish.c crypt_blowfish.h
 
 all: $(TARGET)
 
diff --git a/PasswordCrypt.c b/PasswordCrypt.c
index a62512e..38b980f 100644
--- a/PasswordCrypt.c
+++ b/PasswordCrypt.c
@@ -4,7 +4,9 @@
 #include <openssl/sha.h>
 #include <openssl/md5.h>
 #include "PasswordCrypt.h"
+#include "crypt_blowfish.h"
 
+#define BLOWFISH_HASH_SIZE 31 /* 184/6+1 */
 
 UINT16 get_hash_size (const UINT16 method)
 {
@@ -20,7 +22,7 @@ UINT16 get_hash_size (const UINT16 method)
 	case SHA512_BASED:
 		return SHA512_DIGEST_LENGTH;
 	case BLOWFISH_BASED:
-		return 184 / 8; /* per "man crypt" */
+		return BLOWFISH_HASH_SIZE;
 	}
 
 	return 0;
@@ -201,6 +203,21 @@ static EFI_STATUS sha512_crypt (const char *key,  UINT32 key_len,
 	return EFI_SUCCESS;
 }
 
+#define BF_RESULT_SIZE (7 + 22 + 31 + 1)
+
+static EFI_STATUS blowfish_crypt (const char *key, const char *salt, UINT8 *hash)
+{
+	char *retval, result[BF_RESULT_SIZE];
+
+	retval = crypt_blowfish_rn (key, salt, result, BF_RESULT_SIZE);
+	if (!retval)
+		return EFI_UNSUPPORTED;
+
+	CopyMem(hash, result + 7 + 22, BF_RESULT_SIZE);
+
+	return EFI_SUCCESS;
+}
+
 EFI_STATUS password_crypt (const char *password, UINT32 pw_length,
 			   const PASSWORD_CRYPT *pw_crypt, UINT8 *hash)
 {
@@ -227,8 +244,11 @@ EFI_STATUS password_crypt (const char *password, UINT32 pw_length,
 				      hash);
 		break;
 	case BLOWFISH_BASED:
-		/* TODO unsupported */
-		status = EFI_UNSUPPORTED;
+		if (pw_crypt->salt_size != (7 + 22 + 1)) {
+			status = EFI_INVALID_PARAMETER;
+			break;
+		}
+		status = blowfish_crypt(password, (char *)pw_crypt->salt, hash);
 		break;
 	default:
 		return EFI_INVALID_PARAMETER;
diff --git a/crypt_blowfish.c b/crypt_blowfish.c
new file mode 100644
index 0000000..366a81a
--- /dev/null
+++ b/crypt_blowfish.c
@@ -0,0 +1,822 @@
+/*
+ * The crypt_blowfish homepage is:
+ *
+ *	http://www.openwall.com/crypt/
+ *
+ * This code comes from John the Ripper password cracker, with reentrant
+ * and crypt(3) interfaces added, but optimizations specific to password
+ * cracking removed.
+ *
+ * Written by Solar Designer <solar at openwall.com> in 1998-2011.
+ * No copyright is claimed, and the software is hereby placed in the public
+ * domain.  In case this attempt to disclaim copyright and place the software
+ * in the public domain is deemed null and void, then the software is
+ * Copyright (c) 1998-2011 Solar Designer and it is hereby released to the
+ * general public under the following terms:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted.
+ *
+ * There's ABSOLUTELY NO WARRANTY, express or implied.
+ *
+ * It is my intent that you should be able to use this on your system,
+ * as part of a software package, or anywhere else to improve security,
+ * ensure compatibility, or for any other purpose.  I would appreciate
+ * it if you give credit where it is due and keep your modifications in
+ * the public domain as well, but I don't require that in order to let
+ * you place this code and any modifications you make under a license
+ * of your choice.
+ *
+ * This implementation is mostly compatible with OpenBSD's bcrypt.c (prefix
+ * "$2a$") by Niels Provos <provos at citi.umich.edu>, and uses some of his
+ * ideas.  The password hashing algorithm was designed by David Mazieres
+ * <dm at lcs.mit.edu>.  For more information on the level of compatibility,
+ * prefer refer to the comments in BF_set_key() below and to the included
+ * crypt(3) man page.
+ *
+ * There's a paper on the algorithm that explains its design decisions:
+ *
+ *	http://www.usenix.org/events/usenix99/provos.html
+ *
+ * Some of the tricks in BF_ROUND might be inspired by Eric Young's
+ * Blowfish library (I can't be sure if I would think of something if I
+ * hadn't seen his code).
+ */
+
+#include <efi.h>
+#include <efilib.h>
+
+/* Just to make sure the prototypes match the actual definitions */
+#include "crypt_blowfish.h"
+
+typedef unsigned int BF_word;
+typedef signed int BF_word_signed;
+
+/* Number of Blowfish rounds, this is also hardcoded into a few places */
+#define BF_N				16
+
+typedef BF_word BF_key[BF_N + 2];
+
+typedef struct {
+	BF_word S[4][0x100];
+	BF_key P;
+} BF_ctx;
+
+/*
+ * Magic IV for 64 Blowfish encryptions that we do at the end.
+ * The string is "OrpheanBeholderScryDoubt" on big-endian.
+ */
+static BF_word BF_magic_w[6] = {
+	0x4F727068, 0x65616E42, 0x65686F6C,
+	0x64657253, 0x63727944, 0x6F756274
+};
+
+/*
+ * P-box and S-box tables initialized with digits of Pi.
+ */
+static BF_ctx BF_init_state = {
+	{
+		{
+			0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7,
+			0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99,
+			0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16,
+			0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e,
+			0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee,
+			0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
+			0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef,
+			0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e,
+			0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
+			0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440,
+			0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce,
+			0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
+			0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e,
+			0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677,
+			0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
+			0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032,
+			0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88,
+			0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239,
+			0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e,
+			0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0,
+			0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
+			0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98,
+			0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88,
+			0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
+			0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6,
+			0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d,
+			0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
+			0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7,
+			0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba,
+			0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
+			0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f,
+			0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09,
+			0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
+			0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb,
+			0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279,
+			0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
+			0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab,
+			0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82,
+			0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
+			0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573,
+			0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0,
+			0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
+			0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790,
+			0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8,
+			0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
+			0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0,
+			0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7,
+			0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
+			0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad,
+			0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1,
+			0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
+			0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9,
+			0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477,
+			0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
+			0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49,
+			0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af,
+			0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa,
+			0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5,
+			0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41,
+			0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915,
+			0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400,
+			0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915,
+			0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664,
+			0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a
+		}, {
+			0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623,
+			0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266,
+			0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,
+			0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e,
+			0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6,
+			0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1,
+			0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e,
+			0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1,
+			0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737,
+			0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8,
+			0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff,
+			0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd,
+			0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701,
+			0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7,
+			0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41,
+			0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331,
+			0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf,
+			0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af,
+			0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e,
+			0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87,
+			0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c,
+			0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2,
+			0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16,
+			0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd,
+			0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b,
+			0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509,
+			0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e,
+			0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3,
+			0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f,
+			0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a,
+			0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4,
+			0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960,
+			0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66,
+			0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28,
+			0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802,
+			0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84,
+			0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510,
+			0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf,
+			0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14,
+			0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e,
+			0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50,
+			0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7,
+			0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8,
+			0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281,
+			0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99,
+			0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696,
+			0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128,
+			0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73,
+			0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0,
+			0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0,
+			0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105,
+			0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250,
+			0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3,
+			0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285,
+			0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00,
+			0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061,
+			0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb,
+			0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e,
+			0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735,
+			0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc,
+			0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9,
+			0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340,
+			0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20,
+			0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7
+		}, {
+			0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934,
+			0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068,
+			0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af,
+			0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840,
+			0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45,
+			0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504,
+			0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a,
+			0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb,
+			0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee,
+			0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6,
+			0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42,
+			0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b,
+			0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2,
+			0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb,
+			0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527,
+			0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b,
+			0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33,
+			0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c,
+			0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3,
+			0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc,
+			0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17,
+			0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564,
+			0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b,
+			0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115,
+			0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922,
+			0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728,
+			0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0,
+			0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e,
+			0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37,
+			0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d,
+			0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804,
+			0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b,
+			0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3,
+			0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb,
+			0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d,
+			0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c,
+			0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350,
+			0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9,
+			0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a,
+			0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe,
+			0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d,
+			0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc,
+			0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f,
+			0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61,
+			0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2,
+			0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9,
+			0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2,
+			0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c,
+			0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e,
+			0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633,
+			0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10,
+			0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169,
+			0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52,
+			0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027,
+			0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5,
+			0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62,
+			0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634,
+			0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76,
+			0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24,
+			0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc,
+			0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4,
+			0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c,
+			0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837,
+			0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0
+		}, {
+			0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b,
+			0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe,
+			0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
+			0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4,
+			0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8,
+			0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
+			0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304,
+			0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22,
+			0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
+			0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6,
+			0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9,
+			0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
+			0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593,
+			0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51,
+			0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28,
+			0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c,
+			0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b,
+			0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
+			0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c,
+			0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd,
+			0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a,
+			0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319,
+			0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb,
+			0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f,
+			0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991,
+			0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32,
+			0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680,
+			0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166,
+			0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae,
+			0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb,
+			0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5,
+			0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47,
+			0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370,
+			0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d,
+			0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84,
+			0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048,
+			0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8,
+			0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd,
+			0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9,
+			0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7,
+			0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38,
+			0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f,
+			0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c,
+			0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525,
+			0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1,
+			0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442,
+			0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964,
+			0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e,
+			0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8,
+			0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d,
+			0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f,
+			0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299,
+			0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02,
+			0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc,
+			0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614,
+			0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a,
+			0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6,
+			0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b,
+			0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0,
+			0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060,
+			0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e,
+			0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9,
+			0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f,
+			0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6
+		}
+	}, {
+		0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344,
+		0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89,
+		0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
+		0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917,
+		0x9216d5d9, 0x8979fb1b
+	}
+};
+
+static unsigned char BF_itoa64[64 + 1] =
+	"./ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+
+static unsigned char BF_atoi64[0x60] = {
+	64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 0, 1,
+	54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 64, 64, 64, 64, 64,
+	64, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
+	17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 64, 64, 64, 64, 64,
+	64, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42,
+	43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 64, 64, 64, 64, 64
+};
+
+#define BF_safe_atoi64(dst, src) \
+{ \
+	tmp = (unsigned char)(src); \
+	if ((unsigned int)(tmp -= 0x20) >= 0x60) return -1; \
+	tmp = BF_atoi64[tmp]; \
+	if (tmp > 63) return -1; \
+	(dst) = tmp; \
+}
+
+static int BF_decode(BF_word *dst, const char *src, int size)
+{
+	unsigned char *dptr = (unsigned char *)dst;
+	unsigned char *end = dptr + size;
+	const unsigned char *sptr = (const unsigned char *)src;
+	unsigned int tmp, c1, c2, c3, c4;
+
+	do {
+		BF_safe_atoi64(c1, *sptr++);
+		BF_safe_atoi64(c2, *sptr++);
+		*dptr++ = (c1 << 2) | ((c2 & 0x30) >> 4);
+		if (dptr >= end) break;
+
+		BF_safe_atoi64(c3, *sptr++);
+		*dptr++ = ((c2 & 0x0F) << 4) | ((c3 & 0x3C) >> 2);
+		if (dptr >= end) break;
+
+		BF_safe_atoi64(c4, *sptr++);
+		*dptr++ = ((c3 & 0x03) << 6) | c4;
+	} while (dptr < end);
+
+	return 0;
+}
+
+static void BF_encode(char *dst, const BF_word *src, int size)
+{
+	const unsigned char *sptr = (const unsigned char *)src;
+	const unsigned char *end = sptr + size;
+	unsigned char *dptr = (unsigned char *)dst;
+	unsigned int c1, c2;
+
+	do {
+		c1 = *sptr++;
+		*dptr++ = BF_itoa64[c1 >> 2];
+		c1 = (c1 & 0x03) << 4;
+		if (sptr >= end) {
+			*dptr++ = BF_itoa64[c1];
+			break;
+		}
+
+		c2 = *sptr++;
+		c1 |= c2 >> 4;
+		*dptr++ = BF_itoa64[c1];
+		c1 = (c2 & 0x0f) << 2;
+		if (sptr >= end) {
+			*dptr++ = BF_itoa64[c1];
+			break;
+		}
+
+		c2 = *sptr++;
+		c1 |= c2 >> 6;
+		*dptr++ = BF_itoa64[c1];
+		*dptr++ = BF_itoa64[c2 & 0x3f];
+	} while (sptr < end);
+}
+
+static void BF_swap(BF_word *x, int count)
+{
+	static int endianness_check = 1;
+	char *is_little_endian = (char *)&endianness_check;
+	BF_word tmp;
+
+	if (*is_little_endian)
+	do {
+		tmp = *x;
+		tmp = (tmp << 16) | (tmp >> 16);
+		*x++ = ((tmp & 0x00FF00FF) << 8) | ((tmp >> 8) & 0x00FF00FF);
+	} while (--count);
+}
+
+/* Architectures which can shift addresses left by 2 bits with no extra cost */
+#define BF_ROUND(L, R, N) \
+	tmp1 = L & 0xFF; \
+	tmp2 = L >> 8; \
+	tmp2 &= 0xFF; \
+	tmp3 = L >> 16; \
+	tmp3 &= 0xFF; \
+	tmp4 = L >> 24; \
+	tmp1 = data.ctx.S[3][tmp1]; \
+	tmp2 = data.ctx.S[2][tmp2]; \
+	tmp3 = data.ctx.S[1][tmp3]; \
+	tmp3 += data.ctx.S[0][tmp4]; \
+	tmp3 ^= tmp2; \
+	R ^= data.ctx.P[N + 1]; \
+	tmp3 += tmp1; \
+	R ^= tmp3;
+
+/*
+ * Encrypt one block, BF_N is hardcoded here.
+ */
+#define BF_ENCRYPT \
+	L ^= data.ctx.P[0]; \
+	BF_ROUND(L, R, 0); \
+	BF_ROUND(R, L, 1); \
+	BF_ROUND(L, R, 2); \
+	BF_ROUND(R, L, 3); \
+	BF_ROUND(L, R, 4); \
+	BF_ROUND(R, L, 5); \
+	BF_ROUND(L, R, 6); \
+	BF_ROUND(R, L, 7); \
+	BF_ROUND(L, R, 8); \
+	BF_ROUND(R, L, 9); \
+	BF_ROUND(L, R, 10); \
+	BF_ROUND(R, L, 11); \
+	BF_ROUND(L, R, 12); \
+	BF_ROUND(R, L, 13); \
+	BF_ROUND(L, R, 14); \
+	BF_ROUND(R, L, 15); \
+	tmp4 = R; \
+	R = L; \
+	L = tmp4 ^ data.ctx.P[BF_N + 1];
+
+#define BF_body() \
+	L = R = 0; \
+	ptr = data.ctx.P; \
+	do { \
+		ptr += 2; \
+		BF_ENCRYPT; \
+		*(ptr - 2) = L; \
+		*(ptr - 1) = R; \
+	} while (ptr < &data.ctx.P[BF_N + 2]); \
+\
+	ptr = data.ctx.S[0]; \
+	do { \
+		ptr += 2; \
+		BF_ENCRYPT; \
+		*(ptr - 2) = L; \
+		*(ptr - 1) = R; \
+	} while (ptr < &data.ctx.S[3][0xFF]);
+
+static void BF_set_key(const char *key, BF_key expanded, BF_key initial,
+    unsigned char flags)
+{
+	const char *ptr = key;
+	unsigned int bug, i, j;
+	BF_word safety, sign, diff, tmp[2];
+
+/*
+ * There was a sign extension bug in older revisions of this function.  While
+ * we would have liked to simply fix the bug and move on, we have to provide
+ * a backwards compatibility feature (essentially the bug) for some systems and
+ * a safety measure for some others.  The latter is needed because for certain
+ * multiple inputs to the buggy algorithm there exist easily found inputs to
+ * the correct algorithm that produce the same hash.  Thus, we optionally
+ * deviate from the correct algorithm just enough to avoid such collisions.
+ * While the bug itself affected the majority of passwords containing
+ * characters with the 8th bit set (although only a percentage of those in a
+ * collision-producing way), the anti-collision safety measure affects
+ * only a subset of passwords containing the '\xff' character (not even all of
+ * those passwords, just some of them).  This character is not found in valid
+ * UTF-8 sequences and is rarely used in popular 8-bit character encodings.
+ * Thus, the safety measure is unlikely to cause much annoyance, and is a
+ * reasonable tradeoff to use when authenticating against existing hashes that
+ * are not reliably known to have been computed with the correct algorithm.
+ *
+ * We use an approach that tries to minimize side-channel leaks of password
+ * information - that is, we mostly use fixed-cost bitwise operations instead
+ * of branches or table lookups.  (One conditional branch based on password
+ * length remains.  It is not part of the bug aftermath, though, and is
+ * difficult and possibly unreasonable to avoid given the use of C strings by
+ * the caller, which results in similar timing leaks anyway.)
+ *
+ * For actual implementation, we set an array index in the variable "bug"
+ * (0 means no bug, 1 means sign extension bug emulation) and a flag in the
+ * variable "safety" (bit 16 is set when the safety measure is requested).
+ * Valid combinations of settings are:
+ *
+ * Prefix "$2a$": bug = 0, safety = 0x10000
+ * Prefix "$2x$": bug = 1, safety = 0
+ * Prefix "$2y$": bug = 0, safety = 0
+ */
+	bug = (unsigned int)flags & 1;
+	safety = ((BF_word)flags & 2) << 15;
+
+	sign = diff = 0;
+
+	for (i = 0; i < BF_N + 2; i++) {
+		tmp[0] = tmp[1] = 0;
+		for (j = 0; j < 4; j++) {
+			tmp[0] <<= 8;
+			tmp[0] |= (unsigned char)*ptr; /* correct */
+			tmp[1] <<= 8;
+			tmp[1] |= (BF_word_signed)(signed char)*ptr; /* bug */
+/*
+ * Sign extension in the first char has no effect - nothing to overwrite yet,
+ * and those extra 24 bits will be fully shifted out of the 32-bit word.  For
+ * chars 2, 3, 4 in each four-char block, we set bit 7 of "sign" if sign
+ * extension in tmp[1] occurs.  Once this flag is set, it remains set.
+ */
+			if (j)
+				sign |= tmp[1] & 0x80;
+			if (!*ptr)
+				ptr = key;
+			else
+				ptr++;
+		}
+		diff |= tmp[0] ^ tmp[1]; /* Non-zero on any differences */
+
+		expanded[i] = tmp[bug];
+		initial[i] = BF_init_state.P[i] ^ tmp[bug];
+	}
+
+/*
+ * At this point, "diff" is zero iff the correct and buggy algorithms produced
+ * exactly the same result.  If so and if "sign" is non-zero, which indicates
+ * that there was a non-benign sign extension, this means that we have a
+ * collision between the correctly computed hash for this password and a set of
+ * passwords that could be supplied to the buggy algorithm.  Our safety measure
+ * is meant to protect from such many-buggy to one-correct collisions, by
+ * deviating from the correct algorithm in such cases.  Let's check for this.
+ */
+	diff |= diff >> 16; /* still zero iff exact match */
+	diff &= 0xffff; /* ditto */
+	diff += 0xffff; /* bit 16 set iff "diff" was non-zero (on non-match) */
+	sign <<= 9; /* move the non-benign sign extension flag to bit 16 */
+	sign &= ~diff & safety; /* action needed? */
+
+/*
+ * If we have determined that we need to deviate from the correct algorithm,
+ * flip bit 16 in initial expanded key.  (The choice of 16 is arbitrary, but
+ * let's stick to it now.  It came out of the approach we used above, and it's
+ * not any worse than any other choice we could make.)
+ *
+ * It is crucial that we don't do the same to the expanded key used in the main
+ * Eksblowfish loop.  By doing it to only one of these two, we deviate from a
+ * state that could be directly specified by a password to the buggy algorithm
+ * (and to the fully correct one as well, but that's a side-effect).
+ */
+	initial[0] ^= sign;
+}
+
+static char *BF_crypt(const char *key, const char *setting,
+		      char *output, int size,
+		      BF_word min)
+{
+	static const unsigned char flags_by_subtype[26] =
+		{2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 4, 0};
+	struct {
+		BF_ctx ctx;
+		BF_key expanded_key;
+		union {
+			BF_word salt[4];
+			BF_word output[6];
+		} binary;
+	} data;
+	BF_word L, R;
+	BF_word tmp1, tmp2, tmp3, tmp4;
+	BF_word *ptr;
+	BF_word count;
+	int i;
+
+	if (size < 7 + 22 + 31 + 1) {
+		return NULL;
+	}
+
+	if (setting[0] != '$' ||
+	    setting[1] != '2' ||
+	    setting[2] < 'a' || setting[2] > 'z' ||
+	    !flags_by_subtype[(unsigned int)(unsigned char)setting[2] - 'a'] ||
+	    setting[3] != '$' ||
+	    setting[4] < '0' || setting[4] > '3' ||
+	    setting[5] < '0' || setting[5] > '9' ||
+	    (setting[4] == '3' && setting[5] > '1') ||
+	    setting[6] != '$') {
+		return NULL;
+	}
+
+	count = (BF_word)1 << ((setting[4] - '0') * 10 + (setting[5] - '0'));
+	if (count < min || BF_decode(data.binary.salt, &setting[7], 16)) {
+		return NULL;
+	}
+	BF_swap(data.binary.salt, 4);
+
+	BF_set_key(key, data.expanded_key, data.ctx.P,
+		   flags_by_subtype[(unsigned int)(unsigned char)setting[2] - 'a']);
+
+	CopyMem(data.ctx.S, BF_init_state.S, sizeof(data.ctx.S));
+
+	L = R = 0;
+	for (i = 0; i < BF_N + 2; i += 2) {
+		L ^= data.binary.salt[i & 2];
+		R ^= data.binary.salt[(i & 2) + 1];
+		BF_ENCRYPT;
+		data.ctx.P[i] = L;
+		data.ctx.P[i + 1] = R;
+	}
+
+	ptr = data.ctx.S[0];
+	do {
+		ptr += 4;
+		L ^= data.binary.salt[(BF_N + 2) & 3];
+		R ^= data.binary.salt[(BF_N + 3) & 3];
+		BF_ENCRYPT;
+		*(ptr - 4) = L;
+		*(ptr - 3) = R;
+
+		L ^= data.binary.salt[(BF_N + 4) & 3];
+		R ^= data.binary.salt[(BF_N + 5) & 3];
+		BF_ENCRYPT;
+		*(ptr - 2) = L;
+		*(ptr - 1) = R;
+	} while (ptr < &data.ctx.S[3][0xFF]);
+
+	do {
+		int done;
+
+		for (i = 0; i < BF_N + 2; i += 2) {
+			data.ctx.P[i] ^= data.expanded_key[i];
+			data.ctx.P[i + 1] ^= data.expanded_key[i + 1];
+		}
+
+		done = 0;
+		do {
+			BF_body();
+			if (done)
+				break;
+			done = 1;
+
+			tmp1 = data.binary.salt[0];
+			tmp2 = data.binary.salt[1];
+			tmp3 = data.binary.salt[2];
+			tmp4 = data.binary.salt[3];
+			for (i = 0; i < BF_N; i += 4) {
+				data.ctx.P[i] ^= tmp1;
+				data.ctx.P[i + 1] ^= tmp2;
+				data.ctx.P[i + 2] ^= tmp3;
+				data.ctx.P[i + 3] ^= tmp4;
+			}
+			data.ctx.P[16] ^= tmp1;
+			data.ctx.P[17] ^= tmp2;
+		} while (1);
+	} while (--count);
+
+	for (i = 0; i < 6; i += 2) {
+		L = BF_magic_w[i];
+		R = BF_magic_w[i + 1];
+
+		count = 64;
+		do {
+			BF_ENCRYPT;
+		} while (--count);
+
+		data.binary.output[i] = L;
+		data.binary.output[i + 1] = R;
+	}
+
+	CopyMem(output, (void *)setting, 7 + 22 - 1);
+	output[7 + 22 - 1] = BF_itoa64[(int)
+		BF_atoi64[(int)setting[7 + 22 - 1] - 0x20] & 0x30];
+
+/* This has to be bug-compatible with the original implementation, so
+ * only encode 23 of the 24 bytes. :-) */
+	BF_swap(data.binary.output, 6);
+	BF_encode(&output[7 + 22], data.binary.output, 23);
+	output[7 + 22 + 31] = '\0';
+
+	return output;
+}
+
+int _crypt_output_magic(const char *setting, char *output, int size)
+{
+	if (size < 3)
+		return -1;
+
+	output[0] = '*';
+	output[1] = '0';
+	output[2] = '\0';
+
+	if (setting[0] == '*' && setting[1] == '0')
+		output[1] = '1';
+
+	return 0;
+}
+
+/*
+ * Please preserve the runtime self-test.  It serves two purposes at once:
+ *
+ * 1. We really can't afford the risk of producing incompatible hashes e.g.
+ * when there's something like gcc bug 26587 again, whereas an application or
+ * library integrating this code might not also integrate our external tests or
+ * it might not run them after every build.  Even if it does, the miscompile
+ * might only occur on the production build, but not on a testing build (such
+ * as because of different optimization settings).  It is painful to recover
+ * from incorrectly-computed hashes - merely fixing whatever broke is not
+ * enough.  Thus, a proactive measure like this self-test is needed.
+ *
+ * 2. We don't want to leave sensitive data from our actual password hash
+ * computation on the stack or in registers.  Previous revisions of the code
+ * would do explicit cleanups, but simply running the self-test after hash
+ * computation is more reliable.
+ *
+ * The performance cost of this quick self-test is around 0.6% at the "$2a$08"
+ * setting.
+ */
+char *crypt_blowfish_rn(const char *key, const char *setting,
+			char *output, int size)
+{
+	const char *test_key = "8b \xd0\xc1\xd2\xcf\xcc\xd8";
+	const char *test_setting = "$2a$00$abcdefghijklmnopqrstuu";
+	static const char * const test_hash[2] =
+		{"VUrPmXD6q/nVSSp7pNDhCR9071IfIRe\0\x55", /* $2x$ */
+		"i1D709vfamulimlGcq0qq3UvuUasvEa\0\x55"}; /* $2a$, $2y$ */
+	char *retval;
+	const char *p;
+	int ok;
+	struct {
+		char s[7 + 22 + 1];
+		char o[7 + 22 + 31 + 1 + 1 + 1];
+	} buf;
+
+/* Hash the supplied password */
+	_crypt_output_magic(setting, output, size);
+	retval = BF_crypt(key, setting, output, size, 16);
+
+/*
+ * Do a quick self-test.  It is important that we make both calls to BF_crypt()
+ * from the same scope such that they likely use the same stack locations,
+ * which makes the second call overwrite the first call's sensitive data on the
+ * stack and makes it more likely that any alignment related issues would be
+ * detected by the self-test.
+ */
+	CopyMem(buf.s, (void *)test_setting, sizeof(buf.s));
+	if (retval)
+		buf.s[2] = setting[2];
+	SetMem(buf.o, sizeof(buf.o), 0x55);
+	buf.o[sizeof(buf.o) - 1] = 0;
+	p = BF_crypt(test_key, buf.s, buf.o, sizeof(buf.o) - (1 + 1), 1);
+
+	ok = (p == buf.o &&
+	    !CompareMem((void *)p, (void *)buf.s, 7 + 22) &&
+	    !CompareMem((void *)(p + (7 + 22)),
+	    (void *)test_hash[(unsigned int)(unsigned char)buf.s[2] & 1],
+	    31 + 1 + 1 + 1));
+
+	{
+		const char *k = "\xff\xa3" "34" "\xff\xff\xff\xa3" "345";
+		BF_key ae, ai, ye, yi;
+		BF_set_key(k, ae, ai, 2); /* $2a$ */
+		BF_set_key(k, ye, yi, 4); /* $2y$ */
+		ai[0] ^= 0x10000; /* undo the safety (for comparison) */
+		ok = ok && ai[0] == 0xdb9c59bc && ye[17] == 0x33343500 &&
+		    !CompareMem(ae, ye, sizeof(ae)) &&
+		    !CompareMem(ai, yi, sizeof(ai));
+	}
+
+	if (ok)
+		return retval;
+
+/* Should not happen */
+	_crypt_output_magic(setting, output, size);
+	return NULL;
+}
diff --git a/crypt_blowfish.h b/crypt_blowfish.h
new file mode 100644
index 0000000..dc3bd56
--- /dev/null
+++ b/crypt_blowfish.h
@@ -0,0 +1,22 @@
+/*
+ * Written by Solar Designer <solar at openwall.com> in 2000-2011.
+ * No copyright is claimed, and the software is hereby placed in the public
+ * domain.  In case this attempt to disclaim copyright and place the software
+ * in the public domain is deemed null and void, then the software is
+ * Copyright (c) 2000-2011 Solar Designer and it is hereby released to the
+ * general public under the following terms:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted.
+ *
+ * There's ABSOLUTELY NO WARRANTY, express or implied.
+ *
+ * See crypt_blowfish.c for more information.
+ */
+
+#ifndef _CRYPT_BLOWFISH_H
+#define _CRYPT_BLOWFISH_H
+
+char *crypt_blowfish_rn(const char *key, const char *setting,
+			char *output, int size);
+#endif
-- 
1.7.10.4

From eeda23de3deaa6e13c51e1f831a72a2007029cfb Mon Sep 17 00:00:00 2001
From: Gary Ching-Pang Lin <glin@suse.com>
Date: Tue, 29 Jan 2013 12:09:34 +0800
Subject: [PATCH 4/6] Support MD5-based crypt() hash

---
 PasswordCrypt.c |   68 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 67 insertions(+), 1 deletion(-)

diff --git a/PasswordCrypt.c b/PasswordCrypt.c
index 38b980f..8483498 100644
--- a/PasswordCrypt.c
+++ b/PasswordCrypt.c
@@ -28,6 +28,69 @@ UINT16 get_hash_size (const UINT16 method)
 	return 0;
 }
 
+static const char md5_salt_prefix[] = "$1$";
+
+static EFI_STATUS md5_crypt (const char *key,  UINT32 key_len,
+			     const char *salt, UINT32 salt_size,
+			     UINT8 *hash)
+{
+	MD5_CTX ctx, alt_ctx;
+	UINT8 alt_result[MD5_DIGEST_LENGTH];
+	UINTN cnt;
+
+	MD5_Init(&ctx);
+	MD5_Update(&ctx, key, key_len);
+	MD5_Update(&ctx, md5_salt_prefix, sizeof(md5_salt_prefix) - 1);
+	MD5_Update(&ctx, salt, salt_size);
+
+	MD5_Init(&alt_ctx);
+	MD5_Update(&alt_ctx, key, key_len);
+	MD5_Update(&alt_ctx, salt, salt_size);
+	MD5_Update(&alt_ctx, key, key_len);
+	MD5_Final(alt_result, &alt_ctx);
+
+	for (cnt = key_len; cnt > 16; cnt -= 16)
+		MD5_Update(&ctx, alt_result, 16);
+	MD5_Update(&ctx, alt_result, cnt);
+
+	*alt_result = '\0';
+
+	for (cnt = key_len; cnt > 0; cnt >>= 1) {
+		if ((cnt & 1) != 0) {
+			MD5_Update(&ctx, alt_result, 1);
+		} else {
+			MD5_Update(&ctx, key, 1);
+		}
+	}
+	MD5_Final(alt_result, &ctx);
+
+	for (cnt = 0; cnt < 1000; ++cnt) {
+		MD5_Init(&ctx);
+
+		if ((cnt & 1) != 0)
+			MD5_Update(&ctx, key, key_len);
+		else
+			MD5_Update(&ctx, alt_result, 16);
+
+		if (cnt % 3 != 0)
+			MD5_Update(&ctx, salt, salt_size);
+
+		if (cnt % 7 != 0)
+			MD5_Update(&ctx, key, key_len);
+
+		if ((cnt & 1) != 0)
+			MD5_Update(&ctx, alt_result, 16);
+		else
+			MD5_Update(&ctx, key, key_len);
+
+		MD5_Final(alt_result, &ctx);
+	}
+
+	CopyMem(hash, alt_result, MD5_DIGEST_LENGTH);
+
+	return EFI_SUCCESS;
+}
+
 static EFI_STATUS sha256_crypt (const char *key,  UINT32 key_len,
 				const char *salt, UINT32 salt_size,
 				const UINT32 rounds, UINT8 *hash)
@@ -229,10 +292,13 @@ EFI_STATUS password_crypt (const char *password, UINT32 pw_length,
 	switch (pw_crypt->method) {
 	case TRANDITIONAL_DES:
 	case EXTEND_BSDI_DES:
-	case MD5_BASED:
 		/* TODO unsupported */
 		status = EFI_UNSUPPORTED;
 		break;
+	case MD5_BASED:
+		status = md5_crypt (password, pw_length, (char *)pw_crypt->salt,
+				    pw_crypt->salt_size, hash);
+		break;
 	case SHA256_BASED:
 		status = sha256_crypt(password, pw_length, (char *)pw_crypt->salt,
 				      pw_crypt->salt_size, pw_crypt->iter_count,
-- 
1.7.10.4

From cd8e7b8a25023523f30ed065b892aa2bb1b619d6 Mon Sep 17 00:00:00 2001
From: Gary Ching-Pang Lin <glin@suse.com>
Date: Tue, 29 Jan 2013 17:10:10 +0800
Subject: [PATCH 5/6] Support Tradition DES hash

---
 PasswordCrypt.c |   28 +++++++++++++++++++++++-----
 PasswordCrypt.h |    2 +-
 2 files changed, 24 insertions(+), 6 deletions(-)

diff --git a/PasswordCrypt.c b/PasswordCrypt.c
index 8483498..8d72a82 100644
--- a/PasswordCrypt.c
+++ b/PasswordCrypt.c
@@ -3,18 +3,21 @@
 #include <Library/BaseCryptLib.h>
 #include <openssl/sha.h>
 #include <openssl/md5.h>
+#include <openssl/des.h>
 #include "PasswordCrypt.h"
 #include "crypt_blowfish.h"
 
+#define TRAD_DES_HASH_SIZE 13 /* (64/6+1) + (12/6) */
+#define BSDI_DES_HASH_SIZE 20 /* (64/6+1) + (24/6) + 4 + 1 */
 #define BLOWFISH_HASH_SIZE 31 /* 184/6+1 */
 
 UINT16 get_hash_size (const UINT16 method)
 {
 	switch (method) {
-	case TRANDITIONAL_DES:
-		return 64 / 8; /* per "man crypt" */
+	case TRADITIONAL_DES:
+		return TRAD_DES_HASH_SIZE;
 	case EXTEND_BSDI_DES:
-		return 64 / 8; /* per "man crypt" */
+		return BSDI_DES_HASH_SIZE;
 	case MD5_BASED:
 		return MD5_DIGEST_LENGTH;
 	case SHA256_BASED:
@@ -28,6 +31,20 @@ UINT16 get_hash_size (const UINT16 method)
 	return 0;
 }
 
+static EFI_STATUS trad_des_crypt (const char *key, const char *salt, UINT8 *hash)
+{
+	char result[TRAD_DES_HASH_SIZE + 1];
+	char *ret;
+
+	ret = DES_fcrypt(key, salt, result);
+	if (ret) {
+		CopyMem(hash, result, TRAD_DES_HASH_SIZE);
+		return EFI_SUCCESS;
+	}
+
+	return EFI_UNSUPPORTED;
+}
+
 static const char md5_salt_prefix[] = "$1$";
 
 static EFI_STATUS md5_crypt (const char *key,  UINT32 key_len,
@@ -290,9 +307,10 @@ EFI_STATUS password_crypt (const char *password, UINT32 pw_length,
 		return EFI_INVALID_PARAMETER;
 
 	switch (pw_crypt->method) {
-	case TRANDITIONAL_DES:
+	case TRADITIONAL_DES:
+		status = trad_des_crypt (password, (char *)pw_crypt->salt, hash);
+		break;
 	case EXTEND_BSDI_DES:
-		/* TODO unsupported */
 		status = EFI_UNSUPPORTED;
 		break;
 	case MD5_BASED:
diff --git a/PasswordCrypt.h b/PasswordCrypt.h
index 144bf84..b726f32 100644
--- a/PasswordCrypt.h
+++ b/PasswordCrypt.h
@@ -2,7 +2,7 @@
 #define __PASSWORD_CRYPT_H__
 
 enum HashMethod {
-	TRANDITIONAL_DES = 0,
+	TRADITIONAL_DES = 0,
 	EXTEND_BSDI_DES,
 	MD5_BASED,
 	SHA256_BASED,
-- 
1.7.10.4

From 982d008347669cd6d5699764f23820b9c50d622f Mon Sep 17 00:00:00 2001
From: Gary Ching-Pang Lin <glin@suse.com>
Date: Tue, 29 Jan 2013 17:41:21 +0800
Subject: [PATCH 6/6] Append a null character to the ASCII password string

---
 MokManager.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/MokManager.c b/MokManager.c
index 65465ec..e27c2c1 100644
--- a/MokManager.c
+++ b/MokManager.c
@@ -640,9 +640,10 @@ static EFI_STATUS match_password (PASSWORD_CRYPT *pw_crypt,
 		 * Compute password hash
 		 */
 		if (pw_crypt) {
-			char pw_ascii[PASSWORD_MAX];
+			char pw_ascii[PASSWORD_MAX + 1];
 			for (i = 0; i < pw_length; i++)
 				pw_ascii[i] = (char)password[i];
+			pw_ascii[pw_length] = '\0';
 
 			status = password_crypt(pw_ascii, pw_length, pw_crypt, hash);
 		} else {
-- 
1.7.10.4

Places

File shim-mokmanager-support-crypt-hash-method.patch of Package shim (Revision 465018c63370e11b421f11d957289224)

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