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openssl-1_1.34949
openssl-1_1-Fix-AES-GCM-on-Power-8-CPUs.patch
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File openssl-1_1-Fix-AES-GCM-on-Power-8-CPUs.patch of Package openssl-1_1.34949
From 9ab6b64ac856157a31a54c0d12207c2338bfa8e2 Mon Sep 17 00:00:00 2001 From: Tomas Mraz <tomas@openssl.org> Date: Fri, 9 Sep 2022 14:46:24 +0200 Subject: [PATCH] Fix AES-GCM on Power 8 CPUs Properly fallback to the default implementation on CPUs missing necessary instructions. Fixes #19163 Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19182) --- crypto/evp/e_aes.c | 146 ++++++++++++++++++++++++++--------------------------- 1 file changed, 74 insertions(+), 72 deletions(-) --- a/crypto/evp/e_aes.c +++ b/crypto/evp/e_aes.c @@ -181,30 +181,16 @@ static void ctr64_inc(unsigned char *cou # define PPC_AES_GCM_CAPABLE (OPENSSL_ppccap_P & PPC_MADD300) # define AES_GCM_ENC_BYTES 128 # define AES_GCM_DEC_BYTES 128 -# if PPC_AES_GCM_CAPABLE size_t ppc_aes_gcm_encrypt(const unsigned char *in, unsigned char *out, size_t len, const void *key, unsigned char ivec[16], u64 *Xi); size_t ppc_aes_gcm_decrypt(const unsigned char *in, unsigned char *out, size_t len, const void *key, unsigned char ivec[16], u64 *Xi); -size_t ppc_aes_gcm_encrypt_wrap(const unsigned char *in, unsigned char *out, - size_t len, const void *key, - unsigned char ivec[16], u64 *Xi); -size_t ppc_aes_gcm_decrypt_wrap(const unsigned char *in, unsigned char *out, - size_t len, const void *key, - unsigned char ivec[16], u64 *Xi); -# define AES_gcm_encrypt ppc_aes_gcm_encrypt_wrap -# define AES_gcm_decrypt ppc_aes_gcm_decrypt_wrap -# define AES_GCM_ASM(gctx) ((gctx)->ctr==aes_p8_ctr32_encrypt_blocks && \ - (gctx)->gcm.ghash==gcm_ghash_p8) +# define AES_GCM_ASM_PPC(gctx) ((gctx)->ctr==aes_p8_ctr32_encrypt_blocks && \ + (gctx)->gcm.ghash==gcm_ghash_p8) void gcm_ghash_p8(u64 Xi[2],const u128 Htable[16],const u8 *inp, size_t len); -extern size_t ppc_aes_gcm_encrypt(const unsigned char *in, unsigned char *out, size_t len, - const void *key, unsigned char ivec[16], u64 *Xi); -extern size_t ppc_aes_gcm_decrypt(const unsigned char *in, unsigned char *out, size_t len, - const void *key, unsigned char ivec[16], u64 *Xi); - static inline u32 UTO32(unsigned char *buf) { return ((u32) buf[0] << 24) | ((u32) buf[1] << 16) | ((u32) buf[2] << 8) | ((u32) buf[3]); @@ -223,62 +209,6 @@ static inline u32 add32TOU(unsigned char return r; } -static size_t aes_p10_gcm_crypt(const unsigned char *in, unsigned char *out, size_t len, - const void *key, unsigned char ivec[16], u64 *Xi, int encrypt) -{ - int s = 0; - int ndone = 0; - int ctr_reset = 0; - u64 blocks_unused; - u64 nb = len / 16; - u64 next_ctr = 0; - unsigned char ctr_saved[12]; - - memcpy(ctr_saved, ivec, 12); - - while (nb) { - blocks_unused = (u64) 0xffffffffU + 1 - (u64) UTO32 (ivec + 12); - if (nb > blocks_unused) { - len = blocks_unused * 16; - nb -= blocks_unused; - next_ctr = blocks_unused; - ctr_reset = 1; - } else { - len = nb * 16; - next_ctr = nb; - nb = 0; - } - - s = encrypt ? ppc_aes_gcm_encrypt(in, out, len, key, ivec, Xi) - : ppc_aes_gcm_decrypt(in, out, len, key, ivec, Xi); - - /* add counter to ivec */ - add32TOU(ivec + 12, (u32) next_ctr); - if (ctr_reset) { - ctr_reset = 0; - in += len; - out += len; - } - memcpy(ivec, ctr_saved, 12); - ndone += s; - } - - return ndone; -} - -size_t ppc_aes_gcm_encrypt_wrap(const unsigned char *in, unsigned char *out, size_t len, - const void *key, unsigned char ivec[16], u64 *Xi) -{ - return aes_p10_gcm_crypt(in, out, len, key, ivec, Xi, 1); -} - -size_t ppc_aes_gcm_decrypt_wrap(const unsigned char *in, unsigned char *out, size_t len, - const void *key, unsigned char ivec[16], u64 *Xi) -{ - return aes_p10_gcm_crypt(in, out, len, key, ivec, Xi, 0); -} - -# endif #endif #if defined(OPENSSL_CPUID_OBJ) && ( \ @@ -3294,6 +3224,51 @@ static int aes_gcm_tls_cipher(EVP_CIPHER return rv; } +#if defined(OPENSSL_CPUID_OBJ) && (defined(__powerpc__) || defined(__ppc__) || defined(_ARCH_PPC)) +static size_t ppc_aes_gcm_crypt(const unsigned char *in, unsigned char *out, size_t len, + const void *key, unsigned char ivec[16], u64 *Xi, int encrypt) +{ + int s = 0; + int ndone = 0; + int ctr_reset = 0; + u64 blocks_unused; + u64 nb = len / 16; + u64 next_ctr = 0; + unsigned char ctr_saved[12]; + + memcpy(ctr_saved, ivec, 12); + + while (nb) { + blocks_unused = (u64) 0xffffffffU + 1 - (u64) UTO32 (ivec + 12); + if (nb > blocks_unused) { + len = blocks_unused * 16; + nb -= blocks_unused; + next_ctr = blocks_unused; + ctr_reset = 1; + } else { + len = nb * 16; + next_ctr = nb; + nb = 0; + } + + s = encrypt ? ppc_aes_gcm_encrypt(in, out, len, key, ivec, Xi) + : ppc_aes_gcm_decrypt(in, out, len, key, ivec, Xi); + + /* add counter to ivec */ + add32TOU(ivec + 12, (u32) next_ctr); + if (ctr_reset) { + ctr_reset = 0; + in += len; + out += len; + } + memcpy(ivec, ctr_saved, 12); + ndone += s; + } + + return ndone; +} +#endif + static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t len) { @@ -3325,6 +3300,20 @@ static int aes_gcm_cipher(EVP_CIPHER_CTX out + res, len - res, gctx->gcm.key, gctx->gcm.Yi.c, gctx->gcm.Xi.u); + + gctx->gcm.len.u[1] += bulk; + bulk += res; + } +#elif defined(AES_GCM_ASM_PPC) && defined(OPENSSL_CPUID_OBJ) && (defined(__powerpc__) || defined(__ppc__) || defined(_ARCH_PPC)) + if (PPC_AES_GCM_CAPABLE && len >= AES_GCM_ENC_BYTES && AES_GCM_ASM_PPC(gctx)) { + size_t res = (16 - gctx->gcm.mres) % 16; + + if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, res)) + return -1; + + bulk = ppc_aes_gcm_crypt(in + res, out + res, len - res, + gctx->gcm.key, + gctx->gcm.Yi.c, gctx->gcm.Xi.u, 1); gctx->gcm.len.u[1] += bulk; bulk += res; } @@ -3372,6 +3361,19 @@ static int aes_gcm_cipher(EVP_CIPHER_CTX gctx->gcm.len.u[1] += bulk; bulk += res; } +#elif defined(AES_GCM_ASM_PPC) && defined(OPENSSL_CPUID_OBJ) && (defined(__powerpc__) || defined(__ppc__) || defined(_ARCH_PPC)) + if (PPC_AES_GCM_CAPABLE && len >= AES_GCM_DEC_BYTES && AES_GCM_ASM_PPC(gctx)) { + size_t res = (16 - gctx->gcm.mres) % 16; + + if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, res)) + return -1; + + bulk = ppc_aes_gcm_crypt(in + res, out + res, len - res, + gctx->gcm.key, + gctx->gcm.Yi.c, gctx->gcm.Xi.u, 0); + gctx->gcm.len.u[1] += bulk; + bulk += res; + } #endif if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm, in + bulk,
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