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Message-ID: <593b6997-9da4-439c-ba82-84e8bb2ed980@csgroup.eu>
Date: Mon, 4 Aug 2025 19:42:15 +0200
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Eric Biggers <ebiggers@...nel.org>, linux-crypto@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Ard Biesheuvel <ardb@...nel.org>,
"Jason A . Donenfeld" <Jason@...c4.com>, linux-mips@...r.kernel.org,
linuxppc-dev@...ts.ozlabs.org, sparclinux@...r.kernel.org
Subject: Re: [PATCH 3/7] crypto: powerpc/md5 - Remove PowerPC optimized MD5
code
Le 03/08/2025 à 22:44, Eric Biggers a écrit :
> MD5 is insecure, is no longer commonly used, and has never been
> optimized for the most common architectures in the kernel. Only mips,
> powerpc, and sparc have optimized MD5 code in the kernel. Of these,
> only the powerpc one is actually testable in QEMU. The mips one works
> only on Cavium Octeon SoCs.
>
> Taken together, it's clear that it's time to retire these additional MD5
> implementations, and focus maintenance on the MD5 generic C code.
Sorry, for me it is not that clear. Even if MD5 is depracated we still
have several applications that use MD5 for various reasons on our boards.
I ran the test on kernel v6.16 with following file:
# ls -l avion.au
-rw------- 1 root root 12130159 Jan 1 1970 avion.au
With CONFIG_CRYPTO_MD5_PPC:
# time md5sum avion.au
6513851d6109d42477b20cd56bf57f28 avion.au
real 0m 1.02s
user 0m 0.01s
sys 0m 1.01s
Without CONFIG_CRYPTO_MD5_PPC:
# time md5sum avion.au
6513851d6109d42477b20cd56bf57f28 avion.au
real 0m 1.35s
user 0m 0.01s
sys 0m 1.34s
I think the difference is big enough to consider keeping optimised MD5 code.
Christophe
>
> This commit removes the PowerPC optimized MD5 code.
>
> Signed-off-by: Eric Biggers <ebiggers@...nel.org>
> ---
> arch/powerpc/configs/powernv_defconfig | 1 -
> arch/powerpc/configs/ppc64_defconfig | 1 -
> arch/powerpc/crypto/Kconfig | 8 -
> arch/powerpc/crypto/Makefile | 2 -
> arch/powerpc/crypto/md5-asm.S | 235 -------------------------
> arch/powerpc/crypto/md5-glue.c | 99 -----------
> 6 files changed, 346 deletions(-)
> delete mode 100644 arch/powerpc/crypto/md5-asm.S
> delete mode 100644 arch/powerpc/crypto/md5-glue.c
>
> diff --git a/arch/powerpc/configs/powernv_defconfig b/arch/powerpc/configs/powernv_defconfig
> index d06388b0f66e3..bd4685612de6d 100644
> --- a/arch/powerpc/configs/powernv_defconfig
> +++ b/arch/powerpc/configs/powernv_defconfig
> @@ -318,11 +318,10 @@ CONFIG_FTR_FIXUP_SELFTEST=y
> CONFIG_MSI_BITMAP_SELFTEST=y
> CONFIG_XMON=y
> CONFIG_CRYPTO_BENCHMARK=m
> CONFIG_CRYPTO_PCBC=m
> CONFIG_CRYPTO_HMAC=y
> -CONFIG_CRYPTO_MD5_PPC=m
> CONFIG_CRYPTO_MICHAEL_MIC=m
> CONFIG_CRYPTO_SHA256=y
> CONFIG_CRYPTO_WP512=m
> CONFIG_CRYPTO_ANUBIS=m
> CONFIG_CRYPTO_BLOWFISH=m
> diff --git a/arch/powerpc/configs/ppc64_defconfig b/arch/powerpc/configs/ppc64_defconfig
> index ce34597e9f3e1..2d92c11eea7e4 100644
> --- a/arch/powerpc/configs/ppc64_defconfig
> +++ b/arch/powerpc/configs/ppc64_defconfig
> @@ -385,11 +385,10 @@ CONFIG_CRYPTO_TWOFISH=m
> CONFIG_CRYPTO_PCBC=m
> CONFIG_CRYPTO_MICHAEL_MIC=m
> CONFIG_CRYPTO_SHA256=y
> CONFIG_CRYPTO_WP512=m
> CONFIG_CRYPTO_LZO=m
> -CONFIG_CRYPTO_MD5_PPC=m
> CONFIG_CRYPTO_AES_GCM_P10=m
> CONFIG_CRYPTO_DEV_NX=y
> CONFIG_CRYPTO_DEV_NX_ENCRYPT=m
> CONFIG_CRYPTO_DEV_VMX=y
> CONFIG_SYSTEM_TRUSTED_KEYRING=y
> diff --git a/arch/powerpc/crypto/Kconfig b/arch/powerpc/crypto/Kconfig
> index cfe39fc221cf8..f4b779c7352de 100644
> --- a/arch/powerpc/crypto/Kconfig
> +++ b/arch/powerpc/crypto/Kconfig
> @@ -13,18 +13,10 @@ config CRYPTO_CURVE25519_PPC64
> Curve25519 algorithm
>
> Architecture: PowerPC64
> - Little-endian
>
> -config CRYPTO_MD5_PPC
> - tristate "Digests: MD5"
> - select CRYPTO_HASH
> - help
> - MD5 message digest algorithm (RFC1321)
> -
> - Architecture: powerpc
> -
> config CRYPTO_AES_PPC_SPE
> tristate "Ciphers: AES, modes: ECB/CBC/CTR/XTS (SPE)"
> depends on SPE
> select CRYPTO_SKCIPHER
> help
> diff --git a/arch/powerpc/crypto/Makefile b/arch/powerpc/crypto/Makefile
> index bc8fd27344b8b..9eb59dce67f36 100644
> --- a/arch/powerpc/crypto/Makefile
> +++ b/arch/powerpc/crypto/Makefile
> @@ -4,17 +4,15 @@
> #
> # Arch-specific CryptoAPI modules.
> #
>
> obj-$(CONFIG_CRYPTO_AES_PPC_SPE) += aes-ppc-spe.o
> -obj-$(CONFIG_CRYPTO_MD5_PPC) += md5-ppc.o
> obj-$(CONFIG_CRYPTO_AES_GCM_P10) += aes-gcm-p10-crypto.o
> obj-$(CONFIG_CRYPTO_DEV_VMX_ENCRYPT) += vmx-crypto.o
> obj-$(CONFIG_CRYPTO_CURVE25519_PPC64) += curve25519-ppc64le.o
>
> aes-ppc-spe-y := aes-spe-core.o aes-spe-keys.o aes-tab-4k.o aes-spe-modes.o aes-spe-glue.o
> -md5-ppc-y := md5-asm.o md5-glue.o
> aes-gcm-p10-crypto-y := aes-gcm-p10-glue.o aes-gcm-p10.o ghashp10-ppc.o aesp10-ppc.o
> vmx-crypto-objs := vmx.o aesp8-ppc.o ghashp8-ppc.o aes.o aes_cbc.o aes_ctr.o aes_xts.o ghash.o
> curve25519-ppc64le-y := curve25519-ppc64le-core.o curve25519-ppc64le_asm.o
>
> ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
> diff --git a/arch/powerpc/crypto/md5-asm.S b/arch/powerpc/crypto/md5-asm.S
> deleted file mode 100644
> index fa6bc440cf4ac..0000000000000
> --- a/arch/powerpc/crypto/md5-asm.S
> +++ /dev/null
> @@ -1,235 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0-or-later */
> -/*
> - * Fast MD5 implementation for PPC
> - *
> - * Copyright (c) 2015 Markus Stockhausen <stockhausen@...logia.de>
> - */
> -#include <asm/ppc_asm.h>
> -#include <asm/asm-offsets.h>
> -#include <asm/asm-compat.h>
> -
> -#define rHP r3
> -#define rWP r4
> -
> -#define rH0 r0
> -#define rH1 r6
> -#define rH2 r7
> -#define rH3 r5
> -
> -#define rW00 r8
> -#define rW01 r9
> -#define rW02 r10
> -#define rW03 r11
> -#define rW04 r12
> -#define rW05 r14
> -#define rW06 r15
> -#define rW07 r16
> -#define rW08 r17
> -#define rW09 r18
> -#define rW10 r19
> -#define rW11 r20
> -#define rW12 r21
> -#define rW13 r22
> -#define rW14 r23
> -#define rW15 r24
> -
> -#define rT0 r25
> -#define rT1 r26
> -
> -#define INITIALIZE \
> - PPC_STLU r1,-INT_FRAME_SIZE(r1); \
> - SAVE_GPRS(14, 26, r1) /* push registers onto stack */
> -
> -#define FINALIZE \
> - REST_GPRS(14, 26, r1); /* pop registers from stack */ \
> - addi r1,r1,INT_FRAME_SIZE
> -
> -#ifdef __BIG_ENDIAN__
> -#define LOAD_DATA(reg, off) \
> - lwbrx reg,0,rWP; /* load data */
> -#define INC_PTR \
> - addi rWP,rWP,4; /* increment per word */
> -#define NEXT_BLOCK /* nothing to do */
> -#else
> -#define LOAD_DATA(reg, off) \
> - lwz reg,off(rWP); /* load data */
> -#define INC_PTR /* nothing to do */
> -#define NEXT_BLOCK \
> - addi rWP,rWP,64; /* increment per block */
> -#endif
> -
> -#define R_00_15(a, b, c, d, w0, w1, p, q, off, k0h, k0l, k1h, k1l) \
> - LOAD_DATA(w0, off) /* W */ \
> - and rT0,b,c; /* 1: f = b and c */ \
> - INC_PTR /* ptr++ */ \
> - andc rT1,d,b; /* 1: f' = ~b and d */ \
> - LOAD_DATA(w1, off+4) /* W */ \
> - or rT0,rT0,rT1; /* 1: f = f or f' */ \
> - addi w0,w0,k0l; /* 1: wk = w + k */ \
> - add a,a,rT0; /* 1: a = a + f */ \
> - addis w0,w0,k0h; /* 1: wk = w + k' */ \
> - addis w1,w1,k1h; /* 2: wk = w + k */ \
> - add a,a,w0; /* 1: a = a + wk */ \
> - addi w1,w1,k1l; /* 2: wk = w + k' */ \
> - rotrwi a,a,p; /* 1: a = a rotl x */ \
> - add d,d,w1; /* 2: a = a + wk */ \
> - add a,a,b; /* 1: a = a + b */ \
> - and rT0,a,b; /* 2: f = b and c */ \
> - andc rT1,c,a; /* 2: f' = ~b and d */ \
> - or rT0,rT0,rT1; /* 2: f = f or f' */ \
> - add d,d,rT0; /* 2: a = a + f */ \
> - INC_PTR /* ptr++ */ \
> - rotrwi d,d,q; /* 2: a = a rotl x */ \
> - add d,d,a; /* 2: a = a + b */
> -
> -#define R_16_31(a, b, c, d, w0, w1, p, q, k0h, k0l, k1h, k1l) \
> - andc rT0,c,d; /* 1: f = c and ~d */ \
> - and rT1,b,d; /* 1: f' = b and d */ \
> - addi w0,w0,k0l; /* 1: wk = w + k */ \
> - or rT0,rT0,rT1; /* 1: f = f or f' */ \
> - addis w0,w0,k0h; /* 1: wk = w + k' */ \
> - add a,a,rT0; /* 1: a = a + f */ \
> - addi w1,w1,k1l; /* 2: wk = w + k */ \
> - add a,a,w0; /* 1: a = a + wk */ \
> - addis w1,w1,k1h; /* 2: wk = w + k' */ \
> - andc rT0,b,c; /* 2: f = c and ~d */ \
> - rotrwi a,a,p; /* 1: a = a rotl x */ \
> - add a,a,b; /* 1: a = a + b */ \
> - add d,d,w1; /* 2: a = a + wk */ \
> - and rT1,a,c; /* 2: f' = b and d */ \
> - or rT0,rT0,rT1; /* 2: f = f or f' */ \
> - add d,d,rT0; /* 2: a = a + f */ \
> - rotrwi d,d,q; /* 2: a = a rotl x */ \
> - add d,d,a; /* 2: a = a +b */
> -
> -#define R_32_47(a, b, c, d, w0, w1, p, q, k0h, k0l, k1h, k1l) \
> - xor rT0,b,c; /* 1: f' = b xor c */ \
> - addi w0,w0,k0l; /* 1: wk = w + k */ \
> - xor rT1,rT0,d; /* 1: f = f xor f' */ \
> - addis w0,w0,k0h; /* 1: wk = w + k' */ \
> - add a,a,rT1; /* 1: a = a + f */ \
> - addi w1,w1,k1l; /* 2: wk = w + k */ \
> - add a,a,w0; /* 1: a = a + wk */ \
> - addis w1,w1,k1h; /* 2: wk = w + k' */ \
> - rotrwi a,a,p; /* 1: a = a rotl x */ \
> - add d,d,w1; /* 2: a = a + wk */ \
> - add a,a,b; /* 1: a = a + b */ \
> - xor rT1,rT0,a; /* 2: f = b xor f' */ \
> - add d,d,rT1; /* 2: a = a + f */ \
> - rotrwi d,d,q; /* 2: a = a rotl x */ \
> - add d,d,a; /* 2: a = a + b */
> -
> -#define R_48_63(a, b, c, d, w0, w1, p, q, k0h, k0l, k1h, k1l) \
> - addi w0,w0,k0l; /* 1: w = w + k */ \
> - orc rT0,b,d; /* 1: f = b or ~d */ \
> - addis w0,w0,k0h; /* 1: w = w + k' */ \
> - xor rT0,rT0,c; /* 1: f = f xor c */ \
> - add a,a,w0; /* 1: a = a + wk */ \
> - addi w1,w1,k1l; /* 2: w = w + k */ \
> - add a,a,rT0; /* 1: a = a + f */ \
> - addis w1,w1,k1h; /* 2: w = w + k' */ \
> - rotrwi a,a,p; /* 1: a = a rotl x */ \
> - add a,a,b; /* 1: a = a + b */ \
> - orc rT0,a,c; /* 2: f = b or ~d */ \
> - add d,d,w1; /* 2: a = a + wk */ \
> - xor rT0,rT0,b; /* 2: f = f xor c */ \
> - add d,d,rT0; /* 2: a = a + f */ \
> - rotrwi d,d,q; /* 2: a = a rotl x */ \
> - add d,d,a; /* 2: a = a + b */
> -
> -_GLOBAL(ppc_md5_transform)
> - INITIALIZE
> -
> - mtctr r5
> - lwz rH0,0(rHP)
> - lwz rH1,4(rHP)
> - lwz rH2,8(rHP)
> - lwz rH3,12(rHP)
> -
> -ppc_md5_main:
> - R_00_15(rH0, rH1, rH2, rH3, rW00, rW01, 25, 20, 0,
> - 0xd76b, -23432, 0xe8c8, -18602)
> - R_00_15(rH2, rH3, rH0, rH1, rW02, rW03, 15, 10, 8,
> - 0x2420, 0x70db, 0xc1be, -12562)
> - R_00_15(rH0, rH1, rH2, rH3, rW04, rW05, 25, 20, 16,
> - 0xf57c, 0x0faf, 0x4788, -14806)
> - R_00_15(rH2, rH3, rH0, rH1, rW06, rW07, 15, 10, 24,
> - 0xa830, 0x4613, 0xfd47, -27391)
> - R_00_15(rH0, rH1, rH2, rH3, rW08, rW09, 25, 20, 32,
> - 0x6981, -26408, 0x8b45, -2129)
> - R_00_15(rH2, rH3, rH0, rH1, rW10, rW11, 15, 10, 40,
> - 0xffff, 0x5bb1, 0x895d, -10306)
> - R_00_15(rH0, rH1, rH2, rH3, rW12, rW13, 25, 20, 48,
> - 0x6b90, 0x1122, 0xfd98, 0x7193)
> - R_00_15(rH2, rH3, rH0, rH1, rW14, rW15, 15, 10, 56,
> - 0xa679, 0x438e, 0x49b4, 0x0821)
> -
> - R_16_31(rH0, rH1, rH2, rH3, rW01, rW06, 27, 23,
> - 0x0d56, 0x6e0c, 0x1810, 0x6d2d)
> - R_16_31(rH2, rH3, rH0, rH1, rW11, rW00, 18, 12,
> - 0x9d02, -32109, 0x124c, 0x2332)
> - R_16_31(rH0, rH1, rH2, rH3, rW05, rW10, 27, 23,
> - 0x8ea7, 0x4a33, 0x0245, -18270)
> - R_16_31(rH2, rH3, rH0, rH1, rW15, rW04, 18, 12,
> - 0x8eee, -8608, 0xf258, -5095)
> - R_16_31(rH0, rH1, rH2, rH3, rW09, rW14, 27, 23,
> - 0x969d, -10697, 0x1cbe, -15288)
> - R_16_31(rH2, rH3, rH0, rH1, rW03, rW08, 18, 12,
> - 0x3317, 0x3e99, 0xdbd9, 0x7c15)
> - R_16_31(rH0, rH1, rH2, rH3, rW13, rW02, 27, 23,
> - 0xac4b, 0x7772, 0xd8cf, 0x331d)
> - R_16_31(rH2, rH3, rH0, rH1, rW07, rW12, 18, 12,
> - 0x6a28, 0x6dd8, 0x219a, 0x3b68)
> -
> - R_32_47(rH0, rH1, rH2, rH3, rW05, rW08, 28, 21,
> - 0x29cb, 0x28e5, 0x4218, -7788)
> - R_32_47(rH2, rH3, rH0, rH1, rW11, rW14, 16, 9,
> - 0x473f, 0x06d1, 0x3aae, 0x3036)
> - R_32_47(rH0, rH1, rH2, rH3, rW01, rW04, 28, 21,
> - 0xaea1, -15134, 0x640b, -11295)
> - R_32_47(rH2, rH3, rH0, rH1, rW07, rW10, 16, 9,
> - 0x8f4c, 0x4887, 0xbc7c, -22499)
> - R_32_47(rH0, rH1, rH2, rH3, rW13, rW00, 28, 21,
> - 0x7eb8, -27199, 0x00ea, 0x6050)
> - R_32_47(rH2, rH3, rH0, rH1, rW03, rW06, 16, 9,
> - 0xe01a, 0x22fe, 0x4447, 0x69c5)
> - R_32_47(rH0, rH1, rH2, rH3, rW09, rW12, 28, 21,
> - 0xb7f3, 0x0253, 0x59b1, 0x4d5b)
> - R_32_47(rH2, rH3, rH0, rH1, rW15, rW02, 16, 9,
> - 0x4701, -27017, 0xc7bd, -19859)
> -
> - R_48_63(rH0, rH1, rH2, rH3, rW00, rW07, 26, 22,
> - 0x0988, -1462, 0x4c70, -19401)
> - R_48_63(rH2, rH3, rH0, rH1, rW14, rW05, 17, 11,
> - 0xadaf, -5221, 0xfc99, 0x66f7)
> - R_48_63(rH0, rH1, rH2, rH3, rW12, rW03, 26, 22,
> - 0x7e80, -16418, 0xba1e, -25587)
> - R_48_63(rH2, rH3, rH0, rH1, rW10, rW01, 17, 11,
> - 0x4130, 0x380d, 0xe0c5, 0x738d)
> - lwz rW00,0(rHP)
> - R_48_63(rH0, rH1, rH2, rH3, rW08, rW15, 26, 22,
> - 0xe837, -30770, 0xde8a, 0x69e8)
> - lwz rW14,4(rHP)
> - R_48_63(rH2, rH3, rH0, rH1, rW06, rW13, 17, 11,
> - 0x9e79, 0x260f, 0x256d, -27941)
> - lwz rW12,8(rHP)
> - R_48_63(rH0, rH1, rH2, rH3, rW04, rW11, 26, 22,
> - 0xab75, -20775, 0x4f9e, -28397)
> - lwz rW10,12(rHP)
> - R_48_63(rH2, rH3, rH0, rH1, rW02, rW09, 17, 11,
> - 0x662b, 0x7c56, 0x11b2, 0x0358)
> -
> - add rH0,rH0,rW00
> - stw rH0,0(rHP)
> - add rH1,rH1,rW14
> - stw rH1,4(rHP)
> - add rH2,rH2,rW12
> - stw rH2,8(rHP)
> - add rH3,rH3,rW10
> - stw rH3,12(rHP)
> - NEXT_BLOCK
> -
> - bdnz ppc_md5_main
> -
> - FINALIZE
> - blr
> diff --git a/arch/powerpc/crypto/md5-glue.c b/arch/powerpc/crypto/md5-glue.c
> deleted file mode 100644
> index 204440a90cd84..0000000000000
> --- a/arch/powerpc/crypto/md5-glue.c
> +++ /dev/null
> @@ -1,99 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0-or-later
> -/*
> - * Glue code for MD5 implementation for PPC assembler
> - *
> - * Based on generic implementation.
> - *
> - * Copyright (c) 2015 Markus Stockhausen <stockhausen@...logia.de>
> - */
> -
> -#include <crypto/internal/hash.h>
> -#include <crypto/md5.h>
> -#include <linux/kernel.h>
> -#include <linux/module.h>
> -#include <linux/string.h>
> -
> -extern void ppc_md5_transform(u32 *state, const u8 *src, u32 blocks);
> -
> -static int ppc_md5_init(struct shash_desc *desc)
> -{
> - struct md5_state *sctx = shash_desc_ctx(desc);
> -
> - sctx->hash[0] = MD5_H0;
> - sctx->hash[1] = MD5_H1;
> - sctx->hash[2] = MD5_H2;
> - sctx->hash[3] = MD5_H3;
> - sctx->byte_count = 0;
> -
> - return 0;
> -}
> -
> -static int ppc_md5_update(struct shash_desc *desc, const u8 *data,
> - unsigned int len)
> -{
> - struct md5_state *sctx = shash_desc_ctx(desc);
> -
> - sctx->byte_count += round_down(len, MD5_HMAC_BLOCK_SIZE);
> - ppc_md5_transform(sctx->hash, data, len >> 6);
> - return len - round_down(len, MD5_HMAC_BLOCK_SIZE);
> -}
> -
> -static int ppc_md5_finup(struct shash_desc *desc, const u8 *src,
> - unsigned int offset, u8 *out)
> -{
> - struct md5_state *sctx = shash_desc_ctx(desc);
> - __le64 block[MD5_BLOCK_WORDS] = {};
> - u8 *p = memcpy(block, src, offset);
> - __le32 *dst = (__le32 *)out;
> - __le64 *pbits;
> -
> - src = p;
> - p += offset;
> - *p++ = 0x80;
> - sctx->byte_count += offset;
> - pbits = &block[(MD5_BLOCK_WORDS / (offset > 55 ? 1 : 2)) - 1];
> - *pbits = cpu_to_le64(sctx->byte_count << 3);
> - ppc_md5_transform(sctx->hash, src, (pbits - block + 1) / 8);
> - memzero_explicit(block, sizeof(block));
> -
> - dst[0] = cpu_to_le32(sctx->hash[0]);
> - dst[1] = cpu_to_le32(sctx->hash[1]);
> - dst[2] = cpu_to_le32(sctx->hash[2]);
> - dst[3] = cpu_to_le32(sctx->hash[3]);
> - return 0;
> -}
> -
> -static struct shash_alg alg = {
> - .digestsize = MD5_DIGEST_SIZE,
> - .init = ppc_md5_init,
> - .update = ppc_md5_update,
> - .finup = ppc_md5_finup,
> - .descsize = MD5_STATE_SIZE,
> - .base = {
> - .cra_name = "md5",
> - .cra_driver_name= "md5-ppc",
> - .cra_priority = 200,
> - .cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
> - .cra_blocksize = MD5_HMAC_BLOCK_SIZE,
> - .cra_module = THIS_MODULE,
> - }
> -};
> -
> -static int __init ppc_md5_mod_init(void)
> -{
> - return crypto_register_shash(&alg);
> -}
> -
> -static void __exit ppc_md5_mod_fini(void)
> -{
> - crypto_unregister_shash(&alg);
> -}
> -
> -module_init(ppc_md5_mod_init);
> -module_exit(ppc_md5_mod_fini);
> -
> -MODULE_LICENSE("GPL");
> -MODULE_DESCRIPTION("MD5 Secure Hash Algorithm, PPC assembler");
> -
> -MODULE_ALIAS_CRYPTO("md5");
> -MODULE_ALIAS_CRYPTO("md5-ppc");
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