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crypto: x86/glue-helper - drop CTR helper routines
The glue helper's CTR routines are no longer used, so drop them. Acked-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel
Herbert Xu
parent
f43dcaf2c9
commit
89b7ba5c8b
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@ -34,48 +34,3 @@
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vpxor (5*16)(src), x6, x6; \
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vpxor (6*16)(src), x7, x7; \
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store_8way(dst, x0, x1, x2, x3, x4, x5, x6, x7);
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#define inc_le128(x, minus_one, tmp) \
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vpcmpeqq minus_one, x, tmp; \
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vpsubq minus_one, x, x; \
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vpslldq $8, tmp, tmp; \
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vpsubq tmp, x, x;
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#define load_ctr_8way(iv, bswap, x0, x1, x2, x3, x4, x5, x6, x7, t0, t1, t2) \
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vpcmpeqd t0, t0, t0; \
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vpsrldq $8, t0, t0; /* low: -1, high: 0 */ \
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vmovdqa bswap, t1; \
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\
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/* load IV and byteswap */ \
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vmovdqu (iv), x7; \
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vpshufb t1, x7, x0; \
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\
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/* construct IVs */ \
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inc_le128(x7, t0, t2); \
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vpshufb t1, x7, x1; \
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inc_le128(x7, t0, t2); \
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vpshufb t1, x7, x2; \
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inc_le128(x7, t0, t2); \
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vpshufb t1, x7, x3; \
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inc_le128(x7, t0, t2); \
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vpshufb t1, x7, x4; \
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inc_le128(x7, t0, t2); \
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vpshufb t1, x7, x5; \
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inc_le128(x7, t0, t2); \
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vpshufb t1, x7, x6; \
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inc_le128(x7, t0, t2); \
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vmovdqa x7, t2; \
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vpshufb t1, x7, x7; \
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inc_le128(t2, t0, t1); \
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vmovdqu t2, (iv);
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#define store_ctr_8way(src, dst, x0, x1, x2, x3, x4, x5, x6, x7) \
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vpxor (0*16)(src), x0, x0; \
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vpxor (1*16)(src), x1, x1; \
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vpxor (2*16)(src), x2, x2; \
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vpxor (3*16)(src), x3, x3; \
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vpxor (4*16)(src), x4, x4; \
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vpxor (5*16)(src), x5, x5; \
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vpxor (6*16)(src), x6, x6; \
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vpxor (7*16)(src), x7, x7; \
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store_8way(dst, x0, x1, x2, x3, x4, x5, x6, x7);
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@ -37,61 +37,3 @@
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vpxor (5*32+16)(src), x6, x6; \
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vpxor (6*32+16)(src), x7, x7; \
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store_16way(dst, x0, x1, x2, x3, x4, x5, x6, x7);
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#define inc_le128(x, minus_one, tmp) \
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vpcmpeqq minus_one, x, tmp; \
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vpsubq minus_one, x, x; \
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vpslldq $8, tmp, tmp; \
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vpsubq tmp, x, x;
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#define add2_le128(x, minus_one, minus_two, tmp1, tmp2) \
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vpcmpeqq minus_one, x, tmp1; \
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vpcmpeqq minus_two, x, tmp2; \
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vpsubq minus_two, x, x; \
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vpor tmp2, tmp1, tmp1; \
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vpslldq $8, tmp1, tmp1; \
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vpsubq tmp1, x, x;
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#define load_ctr_16way(iv, bswap, x0, x1, x2, x3, x4, x5, x6, x7, t0, t0x, t1, \
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t1x, t2, t2x, t3, t3x, t4, t5) \
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vpcmpeqd t0, t0, t0; \
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vpsrldq $8, t0, t0; /* ab: -1:0 ; cd: -1:0 */ \
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vpaddq t0, t0, t4; /* ab: -2:0 ; cd: -2:0 */\
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\
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/* load IV and byteswap */ \
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vmovdqu (iv), t2x; \
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vmovdqa t2x, t3x; \
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inc_le128(t2x, t0x, t1x); \
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vbroadcasti128 bswap, t1; \
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vinserti128 $1, t2x, t3, t2; /* ab: le0 ; cd: le1 */ \
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vpshufb t1, t2, x0; \
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\
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/* construct IVs */ \
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add2_le128(t2, t0, t4, t3, t5); /* ab: le2 ; cd: le3 */ \
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vpshufb t1, t2, x1; \
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add2_le128(t2, t0, t4, t3, t5); \
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vpshufb t1, t2, x2; \
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add2_le128(t2, t0, t4, t3, t5); \
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vpshufb t1, t2, x3; \
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add2_le128(t2, t0, t4, t3, t5); \
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vpshufb t1, t2, x4; \
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add2_le128(t2, t0, t4, t3, t5); \
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vpshufb t1, t2, x5; \
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add2_le128(t2, t0, t4, t3, t5); \
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vpshufb t1, t2, x6; \
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add2_le128(t2, t0, t4, t3, t5); \
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vpshufb t1, t2, x7; \
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vextracti128 $1, t2, t2x; \
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inc_le128(t2x, t0x, t3x); \
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vmovdqu t2x, (iv);
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#define store_ctr_16way(src, dst, x0, x1, x2, x3, x4, x5, x6, x7) \
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vpxor (0*32)(src), x0, x0; \
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vpxor (1*32)(src), x1, x1; \
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vpxor (2*32)(src), x2, x2; \
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vpxor (3*32)(src), x3, x3; \
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vpxor (4*32)(src), x4, x4; \
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vpxor (5*32)(src), x5, x5; \
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vpxor (6*32)(src), x6, x6; \
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vpxor (7*32)(src), x7, x7; \
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store_16way(dst, x0, x1, x2, x3, x4, x5, x6, x7);
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@ -6,8 +6,6 @@
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*
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* CBC & ECB parts based on code (crypto/cbc.c,ecb.c) by:
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* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
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* CTR part based on code (crypto/ctr.c) by:
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* (C) Copyright IBM Corp. 2007 - Joy Latten <latten@us.ibm.com>
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*/
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#include <linux/module.h>
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@ -154,74 +152,4 @@ int glue_cbc_decrypt_req_128bit(const struct common_glue_ctx *gctx,
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}
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EXPORT_SYMBOL_GPL(glue_cbc_decrypt_req_128bit);
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int glue_ctr_req_128bit(const struct common_glue_ctx *gctx,
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struct skcipher_request *req)
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{
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void *ctx = crypto_skcipher_ctx(crypto_skcipher_reqtfm(req));
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const unsigned int bsize = 128 / 8;
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struct skcipher_walk walk;
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bool fpu_enabled = false;
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unsigned int nbytes;
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int err;
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err = skcipher_walk_virt(&walk, req, false);
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while ((nbytes = walk.nbytes) >= bsize) {
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const u128 *src = walk.src.virt.addr;
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u128 *dst = walk.dst.virt.addr;
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unsigned int func_bytes, num_blocks;
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unsigned int i;
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le128 ctrblk;
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fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit,
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&walk, fpu_enabled, nbytes);
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be128_to_le128(&ctrblk, (be128 *)walk.iv);
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for (i = 0; i < gctx->num_funcs; i++) {
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num_blocks = gctx->funcs[i].num_blocks;
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func_bytes = bsize * num_blocks;
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if (nbytes < func_bytes)
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continue;
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/* Process multi-block batch */
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do {
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gctx->funcs[i].fn_u.ctr(ctx, (u8 *)dst,
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(const u8 *)src,
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&ctrblk);
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src += num_blocks;
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dst += num_blocks;
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nbytes -= func_bytes;
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} while (nbytes >= func_bytes);
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if (nbytes < bsize)
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break;
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}
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le128_to_be128((be128 *)walk.iv, &ctrblk);
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err = skcipher_walk_done(&walk, nbytes);
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}
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glue_fpu_end(fpu_enabled);
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if (nbytes) {
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le128 ctrblk;
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u128 tmp;
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be128_to_le128(&ctrblk, (be128 *)walk.iv);
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memcpy(&tmp, walk.src.virt.addr, nbytes);
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gctx->funcs[gctx->num_funcs - 1].fn_u.ctr(ctx, (u8 *)&tmp,
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(const u8 *)&tmp,
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&ctrblk);
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memcpy(walk.dst.virt.addr, &tmp, nbytes);
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le128_to_be128((be128 *)walk.iv, &ctrblk);
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err = skcipher_walk_done(&walk, 0);
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}
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return err;
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}
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EXPORT_SYMBOL_GPL(glue_ctr_req_128bit);
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MODULE_LICENSE("GPL");
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@ -9,19 +9,15 @@
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#include <crypto/internal/skcipher.h>
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#include <linux/kernel.h>
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#include <asm/fpu/api.h>
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#include <crypto/b128ops.h>
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typedef void (*common_glue_func_t)(const void *ctx, u8 *dst, const u8 *src);
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typedef void (*common_glue_cbc_func_t)(const void *ctx, u8 *dst, const u8 *src);
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typedef void (*common_glue_ctr_func_t)(const void *ctx, u8 *dst, const u8 *src,
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le128 *iv);
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struct common_glue_func_entry {
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unsigned int num_blocks; /* number of blocks that @fn will process */
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union {
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common_glue_func_t ecb;
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common_glue_cbc_func_t cbc;
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common_glue_ctr_func_t ctr;
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} fn_u;
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};
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@ -66,31 +62,6 @@ static inline void glue_fpu_end(bool fpu_enabled)
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kernel_fpu_end();
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}
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static inline void le128_to_be128(be128 *dst, const le128 *src)
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{
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dst->a = cpu_to_be64(le64_to_cpu(src->a));
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dst->b = cpu_to_be64(le64_to_cpu(src->b));
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}
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static inline void be128_to_le128(le128 *dst, const be128 *src)
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{
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dst->a = cpu_to_le64(be64_to_cpu(src->a));
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dst->b = cpu_to_le64(be64_to_cpu(src->b));
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}
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static inline void le128_inc(le128 *i)
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{
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u64 a = le64_to_cpu(i->a);
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u64 b = le64_to_cpu(i->b);
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b++;
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if (!b)
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a++;
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i->a = cpu_to_le64(a);
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i->b = cpu_to_le64(b);
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}
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extern int glue_ecb_req_128bit(const struct common_glue_ctx *gctx,
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struct skcipher_request *req);
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@ -100,7 +71,4 @@ extern int glue_cbc_encrypt_req_128bit(const common_glue_func_t fn,
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extern int glue_cbc_decrypt_req_128bit(const struct common_glue_ctx *gctx,
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struct skcipher_request *req);
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extern int glue_ctr_req_128bit(const struct common_glue_ctx *gctx,
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struct skcipher_request *req);
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#endif /* _CRYPTO_GLUE_HELPER_H */
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