From 3c2eb6b76cabb7d90834798d6455f7f3431fc989 Mon Sep 17 00:00:00 2001 From: Joerg Schmidbauer Date: Wed, 14 Aug 2019 14:56:54 +0200 Subject: s390/crypto: Support for SHA3 via CPACF (MSA6) This patch introduces sha3 support for s390. - Rework the s390-specific SHA1 and SHA2 related code to provide the basis for SHA3. - Provide two new kernel modules sha3_256_s390 and sha3_512_s390 together with new kernel options. Signed-off-by: Joerg Schmidbauer Reviewed-by: Ingo Franzki Reviewed-by: Harald Freudenberger Signed-off-by: Heiko Carstens --- arch/s390/crypto/Makefile | 2 + arch/s390/crypto/sha.h | 12 +-- arch/s390/crypto/sha3_256_s390.c | 147 +++++++++++++++++++++++++++++++++++++ arch/s390/crypto/sha3_512_s390.c | 155 +++++++++++++++++++++++++++++++++++++++ arch/s390/crypto/sha_common.c | 75 +++++++++++++------ 5 files changed, 363 insertions(+), 28 deletions(-) create mode 100644 arch/s390/crypto/sha3_256_s390.c create mode 100644 arch/s390/crypto/sha3_512_s390.c (limited to 'arch/s390/crypto') diff --git a/arch/s390/crypto/Makefile b/arch/s390/crypto/Makefile index a51010ea62fa..12889d4652cc 100644 --- a/arch/s390/crypto/Makefile +++ b/arch/s390/crypto/Makefile @@ -6,6 +6,8 @@ obj-$(CONFIG_CRYPTO_SHA1_S390) += sha1_s390.o sha_common.o obj-$(CONFIG_CRYPTO_SHA256_S390) += sha256_s390.o sha_common.o obj-$(CONFIG_CRYPTO_SHA512_S390) += sha512_s390.o sha_common.o +obj-$(CONFIG_CRYPTO_SHA3_256_S390) += sha3_256_s390.o sha_common.o +obj-$(CONFIG_CRYPTO_SHA3_512_S390) += sha3_512_s390.o sha_common.o obj-$(CONFIG_CRYPTO_DES_S390) += des_s390.o obj-$(CONFIG_CRYPTO_AES_S390) += aes_s390.o obj-$(CONFIG_CRYPTO_PAES_S390) += paes_s390.o diff --git a/arch/s390/crypto/sha.h b/arch/s390/crypto/sha.h index d6f8258b44df..ada2f98c27b7 100644 --- a/arch/s390/crypto/sha.h +++ b/arch/s390/crypto/sha.h @@ -12,15 +12,17 @@ #include #include +#include /* must be big enough for the largest SHA variant */ -#define SHA_MAX_STATE_SIZE (SHA512_DIGEST_SIZE / 4) -#define SHA_MAX_BLOCK_SIZE SHA512_BLOCK_SIZE +#define SHA3_STATE_SIZE 200 +#define CPACF_MAX_PARMBLOCK_SIZE SHA3_STATE_SIZE +#define SHA_MAX_BLOCK_SIZE SHA3_224_BLOCK_SIZE struct s390_sha_ctx { - u64 count; /* message length in bytes */ - u32 state[SHA_MAX_STATE_SIZE]; - u8 buf[2 * SHA_MAX_BLOCK_SIZE]; + u64 count; /* message length in bytes */ + u32 state[CPACF_MAX_PARMBLOCK_SIZE / sizeof(u32)]; + u8 buf[SHA_MAX_BLOCK_SIZE]; int func; /* KIMD function to use */ }; diff --git a/arch/s390/crypto/sha3_256_s390.c b/arch/s390/crypto/sha3_256_s390.c new file mode 100644 index 000000000000..460cbbbaa44a --- /dev/null +++ b/arch/s390/crypto/sha3_256_s390.c @@ -0,0 +1,147 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Cryptographic API. + * + * s390 implementation of the SHA256 and SHA224 Secure Hash Algorithm. + * + * s390 Version: + * Copyright IBM Corp. 2019 + * Author(s): Joerg Schmidbauer (jschmidb@de.ibm.com) + */ +#include +#include +#include +#include +#include +#include +#include + +#include "sha.h" + +static int sha3_256_init(struct shash_desc *desc) +{ + struct s390_sha_ctx *sctx = shash_desc_ctx(desc); + + memset(sctx->state, 0, sizeof(sctx->state)); + sctx->count = 0; + sctx->func = CPACF_KIMD_SHA3_256; + + return 0; +} + +static int sha3_256_export(struct shash_desc *desc, void *out) +{ + struct s390_sha_ctx *sctx = shash_desc_ctx(desc); + struct sha3_state *octx = out; + + octx->rsiz = sctx->count; + memcpy(octx->st, sctx->state, sizeof(octx->st)); + memcpy(octx->buf, sctx->buf, sizeof(octx->buf)); + + return 0; +} + +static int sha3_256_import(struct shash_desc *desc, const void *in) +{ + struct s390_sha_ctx *sctx = shash_desc_ctx(desc); + const struct sha3_state *ictx = in; + + sctx->count = ictx->rsiz; + memcpy(sctx->state, ictx->st, sizeof(ictx->st)); + memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf)); + sctx->func = CPACF_KIMD_SHA3_256; + + return 0; +} + +static int sha3_224_import(struct shash_desc *desc, const void *in) +{ + struct s390_sha_ctx *sctx = shash_desc_ctx(desc); + const struct sha3_state *ictx = in; + + sctx->count = ictx->rsiz; + memcpy(sctx->state, ictx->st, sizeof(ictx->st)); + memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf)); + sctx->func = CPACF_KIMD_SHA3_224; + + return 0; +} + +static struct shash_alg sha3_256_alg = { + .digestsize = SHA3_256_DIGEST_SIZE, /* = 32 */ + .init = sha3_256_init, + .update = s390_sha_update, + .final = s390_sha_final, + .export = sha3_256_export, + .import = sha3_256_import, + .descsize = sizeof(struct s390_sha_ctx), + .statesize = sizeof(struct sha3_state), + .base = { + .cra_name = "sha3-256", + .cra_driver_name = "sha3-256-s390", + .cra_priority = 300, + .cra_blocksize = SHA3_256_BLOCK_SIZE, + .cra_module = THIS_MODULE, + } +}; + +static int sha3_224_init(struct shash_desc *desc) +{ + struct s390_sha_ctx *sctx = shash_desc_ctx(desc); + + memset(sctx->state, 0, sizeof(sctx->state)); + sctx->count = 0; + sctx->func = CPACF_KIMD_SHA3_224; + + return 0; +} + +static struct shash_alg sha3_224_alg = { + .digestsize = SHA3_224_DIGEST_SIZE, + .init = sha3_224_init, + .update = s390_sha_update, + .final = s390_sha_final, + .export = sha3_256_export, /* same as for 256 */ + .import = sha3_224_import, /* function code different! */ + .descsize = sizeof(struct s390_sha_ctx), + .statesize = sizeof(struct sha3_state), + .base = { + .cra_name = "sha3-224", + .cra_driver_name = "sha3-224-s390", + .cra_priority = 300, + .cra_blocksize = SHA3_224_BLOCK_SIZE, + .cra_module = THIS_MODULE, + } +}; + +static int __init sha3_256_s390_init(void) +{ + int ret; + + if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA3_256)) + return -ENODEV; + + ret = crypto_register_shash(&sha3_256_alg); + if (ret < 0) + goto out; + + ret = crypto_register_shash(&sha3_224_alg); + if (ret < 0) + crypto_unregister_shash(&sha3_256_alg); +out: + return ret; +} + +static void __exit sha3_256_s390_fini(void) +{ + crypto_unregister_shash(&sha3_224_alg); + crypto_unregister_shash(&sha3_256_alg); +} + +module_cpu_feature_match(MSA, sha3_256_s390_init); +module_exit(sha3_256_s390_fini); + +MODULE_ALIAS_CRYPTO("sha3-256"); +MODULE_ALIAS_CRYPTO("sha3-224"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("SHA3-256 and SHA3-224 Secure Hash Algorithm"); diff --git a/arch/s390/crypto/sha3_512_s390.c b/arch/s390/crypto/sha3_512_s390.c new file mode 100644 index 000000000000..72cf460a53e5 --- /dev/null +++ b/arch/s390/crypto/sha3_512_s390.c @@ -0,0 +1,155 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Cryptographic API. + * + * s390 implementation of the SHA512 and SHA384 Secure Hash Algorithm. + * + * Copyright IBM Corp. 2019 + * Author(s): Joerg Schmidbauer (jschmidb@de.ibm.com) + */ +#include +#include +#include +#include +#include +#include +#include + +#include "sha.h" + +static int sha3_512_init(struct shash_desc *desc) +{ + struct s390_sha_ctx *sctx = shash_desc_ctx(desc); + + memset(sctx->state, 0, sizeof(sctx->state)); + sctx->count = 0; + sctx->func = CPACF_KIMD_SHA3_512; + + return 0; +} + +static int sha3_512_export(struct shash_desc *desc, void *out) +{ + struct s390_sha_ctx *sctx = shash_desc_ctx(desc); + struct sha3_state *octx = out; + + octx->rsiz = sctx->count; + octx->rsizw = sctx->count >> 32; + + memcpy(octx->st, sctx->state, sizeof(octx->st)); + memcpy(octx->buf, sctx->buf, sizeof(octx->buf)); + + return 0; +} + +static int sha3_512_import(struct shash_desc *desc, const void *in) +{ + struct s390_sha_ctx *sctx = shash_desc_ctx(desc); + const struct sha3_state *ictx = in; + + if (unlikely(ictx->rsizw)) + return -ERANGE; + sctx->count = ictx->rsiz; + + memcpy(sctx->state, ictx->st, sizeof(ictx->st)); + memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf)); + sctx->func = CPACF_KIMD_SHA3_512; + + return 0; +} + +static int sha3_384_import(struct shash_desc *desc, const void *in) +{ + struct s390_sha_ctx *sctx = shash_desc_ctx(desc); + const struct sha3_state *ictx = in; + + if (unlikely(ictx->rsizw)) + return -ERANGE; + sctx->count = ictx->rsiz; + + memcpy(sctx->state, ictx->st, sizeof(ictx->st)); + memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf)); + sctx->func = CPACF_KIMD_SHA3_384; + + return 0; +} + +static struct shash_alg sha3_512_alg = { + .digestsize = SHA3_512_DIGEST_SIZE, + .init = sha3_512_init, + .update = s390_sha_update, + .final = s390_sha_final, + .export = sha3_512_export, + .import = sha3_512_import, + .descsize = sizeof(struct s390_sha_ctx), + .statesize = sizeof(struct sha3_state), + .base = { + .cra_name = "sha3-512", + .cra_driver_name = "sha3-512-s390", + .cra_priority = 300, + .cra_blocksize = SHA3_512_BLOCK_SIZE, + .cra_module = THIS_MODULE, + } +}; + +MODULE_ALIAS_CRYPTO("sha3-512"); + +static int sha3_384_init(struct shash_desc *desc) +{ + struct s390_sha_ctx *sctx = shash_desc_ctx(desc); + + memset(sctx->state, 0, sizeof(sctx->state)); + sctx->count = 0; + sctx->func = CPACF_KIMD_SHA3_384; + + return 0; +} + +static struct shash_alg sha3_384_alg = { + .digestsize = SHA3_384_DIGEST_SIZE, + .init = sha3_384_init, + .update = s390_sha_update, + .final = s390_sha_final, + .export = sha3_512_export, /* same as for 512 */ + .import = sha3_384_import, /* function code different! */ + .descsize = sizeof(struct s390_sha_ctx), + .statesize = sizeof(struct sha3_state), + .base = { + .cra_name = "sha3-384", + .cra_driver_name = "sha3-384-s390", + .cra_priority = 300, + .cra_blocksize = SHA3_384_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct s390_sha_ctx), + .cra_module = THIS_MODULE, + } +}; + +MODULE_ALIAS_CRYPTO("sha3-384"); + +static int __init init(void) +{ + int ret; + + if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA3_512)) + return -ENODEV; + ret = crypto_register_shash(&sha3_512_alg); + if (ret < 0) + goto out; + ret = crypto_register_shash(&sha3_384_alg); + if (ret < 0) + crypto_unregister_shash(&sha3_512_alg); +out: + return ret; +} + +static void __exit fini(void) +{ + crypto_unregister_shash(&sha3_512_alg); + crypto_unregister_shash(&sha3_384_alg); +} + +module_cpu_feature_match(MSA, init); +module_exit(fini); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("SHA3-512 and SHA3-384 Secure Hash Algorithm"); diff --git a/arch/s390/crypto/sha_common.c b/arch/s390/crypto/sha_common.c index cf0718d121bc..d39e0f079217 100644 --- a/arch/s390/crypto/sha_common.c +++ b/arch/s390/crypto/sha_common.c @@ -20,7 +20,7 @@ int s390_sha_update(struct shash_desc *desc, const u8 *data, unsigned int len) unsigned int index, n; /* how much is already in the buffer? */ - index = ctx->count & (bsize - 1); + index = ctx->count % bsize; ctx->count += len; if ((index + len) < bsize) @@ -37,7 +37,7 @@ int s390_sha_update(struct shash_desc *desc, const u8 *data, unsigned int len) /* process as many blocks as possible */ if (len >= bsize) { - n = len & ~(bsize - 1); + n = (len / bsize) * bsize; cpacf_kimd(ctx->func, ctx->state, data, n); data += n; len -= n; @@ -50,34 +50,63 @@ store: } EXPORT_SYMBOL_GPL(s390_sha_update); +static int s390_crypto_shash_parmsize(int func) +{ + switch (func) { + case CPACF_KLMD_SHA_1: + return 20; + case CPACF_KLMD_SHA_256: + return 32; + case CPACF_KLMD_SHA_512: + return 64; + case CPACF_KLMD_SHA3_224: + case CPACF_KLMD_SHA3_256: + case CPACF_KLMD_SHA3_384: + case CPACF_KLMD_SHA3_512: + return 200; + default: + return -EINVAL; + } +} + int s390_sha_final(struct shash_desc *desc, u8 *out) { struct s390_sha_ctx *ctx = shash_desc_ctx(desc); unsigned int bsize = crypto_shash_blocksize(desc->tfm); u64 bits; - unsigned int index, end, plen; - - /* SHA-512 uses 128 bit padding length */ - plen = (bsize > SHA256_BLOCK_SIZE) ? 16 : 8; + unsigned int n, mbl_offset; - /* must perform manual padding */ - index = ctx->count & (bsize - 1); - end = (index < bsize - plen) ? bsize : (2 * bsize); - - /* start pad with 1 */ - ctx->buf[index] = 0x80; - index++; - - /* pad with zeros */ - memset(ctx->buf + index, 0x00, end - index - 8); - - /* - * Append message length. Well, SHA-512 wants a 128 bit length value, - * nevertheless we use u64, should be enough for now... - */ + n = ctx->count % bsize; bits = ctx->count * 8; - memcpy(ctx->buf + end - 8, &bits, sizeof(bits)); - cpacf_kimd(ctx->func, ctx->state, ctx->buf, end); + mbl_offset = s390_crypto_shash_parmsize(ctx->func) / sizeof(u32); + if (mbl_offset < 0) + return -EINVAL; + + /* set total msg bit length (mbl) in CPACF parmblock */ + switch (ctx->func) { + case CPACF_KLMD_SHA_1: + case CPACF_KLMD_SHA_256: + memcpy(ctx->state + mbl_offset, &bits, sizeof(bits)); + break; + case CPACF_KLMD_SHA_512: + /* + * the SHA512 parmblock has a 128-bit mbl field, clear + * high-order u64 field, copy bits to low-order u64 field + */ + memset(ctx->state + mbl_offset, 0x00, sizeof(bits)); + mbl_offset += sizeof(u64) / sizeof(u32); + memcpy(ctx->state + mbl_offset, &bits, sizeof(bits)); + break; + case CPACF_KLMD_SHA3_224: + case CPACF_KLMD_SHA3_256: + case CPACF_KLMD_SHA3_384: + case CPACF_KLMD_SHA3_512: + break; + default: + return -EINVAL; + } + + cpacf_klmd(ctx->func, ctx->state, ctx->buf, n); /* copy digest to out */ memcpy(out, ctx->state, crypto_shash_digestsize(desc->tfm)); -- cgit