X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fevp%2Fe_aes.c;h=6080d1632d7750e4239dc856b7dc35e3eb8a2015;hp=2e5e4edaad836c149ddb408ba57ee6b54dc5f195;hb=e74be3d497e5ef60515c186100f3abef832a9f9d;hpb=2198b3a55de681e1f3c23edb0586afe13f438051 diff --git a/crypto/evp/e_aes.c b/crypto/evp/e_aes.c index 2e5e4edaad..6080d1632d 100644 --- a/crypto/evp/e_aes.c +++ b/crypto/evp/e_aes.c @@ -1,7 +1,7 @@ /* - * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved. + * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved. * - * Licensed under the OpenSSL license (the "License"). You may not use + * Licensed under the Apache License 2.0 (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html @@ -17,6 +17,7 @@ #include "internal/evp_int.h" #include "modes_lcl.h" #include +#include #include "evp_locl.h" typedef struct { @@ -44,6 +45,7 @@ typedef struct { int taglen; int iv_gen; /* It is OK to generate IVs */ int tls_aad_len; /* TLS AAD length */ + uint64_t tls_enc_records; /* Number of TLS records encrypted */ ctr128_f ctr; } EVP_AES_GCM_CTX; @@ -144,6 +146,22 @@ void AES_xts_decrypt(const unsigned char *inp, unsigned char *out, size_t len, const unsigned char iv[16]); #endif +/* increment counter (64-bit int) by 1 */ +static void ctr64_inc(unsigned char *counter) +{ + int n = 8; + unsigned char c; + + do { + --n; + c = counter[n]; + ++c; + counter[n] = c; + if (c) + return; + } while (n); +} + #if defined(OPENSSL_CPUID_OBJ) && (defined(__powerpc__) || defined(__ppc__) || defined(_ARCH_PPC)) # include "ppc_arch.h" # ifdef VPAES_ASM @@ -523,7 +541,8 @@ const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ # define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \ static const EVP_CIPHER aesni_##keylen##_##mode = { \ nid##_##keylen##_##mode,blocksize, \ - (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ + (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE||EVP_CIPH_##MODE##_MODE==EVP_CIPH_SIV_MODE?2:1)*keylen/8, \ + ivlen, \ flags|EVP_CIPH_##MODE##_MODE, \ aesni_##mode##_init_key, \ aesni_##mode##_cipher, \ @@ -532,7 +551,8 @@ static const EVP_CIPHER aesni_##keylen##_##mode = { \ NULL,NULL,aes_##mode##_ctrl,NULL }; \ static const EVP_CIPHER aes_##keylen##_##mode = { \ nid##_##keylen##_##mode,blocksize, \ - (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ + (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE||EVP_CIPH_##MODE##_MODE==EVP_CIPH_SIV_MODE?2:1)*keylen/8, \ + ivlen, \ flags|EVP_CIPH_##MODE##_MODE, \ aes_##mode##_init_key, \ aes_##mode##_cipher, \ @@ -807,148 +827,1690 @@ static int aes_t4_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, } } - aes_t4_set_encrypt_key(key + EVP_CIPHER_CTX_key_length(ctx) / 2, - EVP_CIPHER_CTX_key_length(ctx) * 4, - &xctx->ks2.ks); - xctx->xts.block2 = (block128_f) aes_t4_encrypt; + aes_t4_set_encrypt_key(key + EVP_CIPHER_CTX_key_length(ctx) / 2, + EVP_CIPHER_CTX_key_length(ctx) * 4, + &xctx->ks2.ks); + xctx->xts.block2 = (block128_f) aes_t4_encrypt; + + xctx->xts.key1 = &xctx->ks1; + } + + if (iv) { + xctx->xts.key2 = &xctx->ks2; + memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, 16); + } + + return 1; +} + +# define aes_t4_xts_cipher aes_xts_cipher +static int aes_t4_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len); + +static int aes_t4_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) +{ + EVP_AES_CCM_CTX *cctx = EVP_C_DATA(EVP_AES_CCM_CTX,ctx); + if (!iv && !key) + return 1; + if (key) { + int bits = EVP_CIPHER_CTX_key_length(ctx) * 8; + aes_t4_set_encrypt_key(key, bits, &cctx->ks.ks); + CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, + &cctx->ks, (block128_f) aes_t4_encrypt); + cctx->str = NULL; + cctx->key_set = 1; + } + if (iv) { + memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, 15 - cctx->L); + cctx->iv_set = 1; + } + return 1; +} + +# define aes_t4_ccm_cipher aes_ccm_cipher +static int aes_t4_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len); + +# ifndef OPENSSL_NO_OCB +static int aes_t4_ocb_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) +{ + EVP_AES_OCB_CTX *octx = EVP_C_DATA(EVP_AES_OCB_CTX,ctx); + if (!iv && !key) + return 1; + if (key) { + do { + /* + * We set both the encrypt and decrypt key here because decrypt + * needs both. We could possibly optimise to remove setting the + * decrypt for an encryption operation. + */ + aes_t4_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, + &octx->ksenc.ks); + aes_t4_set_decrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, + &octx->ksdec.ks); + if (!CRYPTO_ocb128_init(&octx->ocb, + &octx->ksenc.ks, &octx->ksdec.ks, + (block128_f) aes_t4_encrypt, + (block128_f) aes_t4_decrypt, + NULL)) + return 0; + } + while (0); + + /* + * If we have an iv we can set it directly, otherwise use saved IV. + */ + if (iv == NULL && octx->iv_set) + iv = octx->iv; + if (iv) { + if (CRYPTO_ocb128_setiv(&octx->ocb, iv, octx->ivlen, octx->taglen) + != 1) + return 0; + octx->iv_set = 1; + } + octx->key_set = 1; + } else { + /* If key set use IV, otherwise copy */ + if (octx->key_set) + CRYPTO_ocb128_setiv(&octx->ocb, iv, octx->ivlen, octx->taglen); + else + memcpy(octx->iv, iv, octx->ivlen); + octx->iv_set = 1; + } + return 1; +} + +# define aes_t4_ocb_cipher aes_ocb_cipher +static int aes_t4_ocb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len); +# endif /* OPENSSL_NO_OCB */ + +# define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ +static const EVP_CIPHER aes_t4_##keylen##_##mode = { \ + nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \ + flags|EVP_CIPH_##MODE##_MODE, \ + aes_t4_init_key, \ + aes_t4_##mode##_cipher, \ + NULL, \ + sizeof(EVP_AES_KEY), \ + NULL,NULL,NULL,NULL }; \ +static const EVP_CIPHER aes_##keylen##_##mode = { \ + nid##_##keylen##_##nmode,blocksize, \ + keylen/8,ivlen, \ + flags|EVP_CIPH_##MODE##_MODE, \ + aes_init_key, \ + aes_##mode##_cipher, \ + NULL, \ + sizeof(EVP_AES_KEY), \ + NULL,NULL,NULL,NULL }; \ +const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ +{ return SPARC_AES_CAPABLE?&aes_t4_##keylen##_##mode:&aes_##keylen##_##mode; } + +# define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \ +static const EVP_CIPHER aes_t4_##keylen##_##mode = { \ + nid##_##keylen##_##mode,blocksize, \ + (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE||EVP_CIPH_##MODE##_MODE==EVP_CIPH_SIV_MODE?2:1)*keylen/8, \ + ivlen, \ + flags|EVP_CIPH_##MODE##_MODE, \ + aes_t4_##mode##_init_key, \ + aes_t4_##mode##_cipher, \ + aes_##mode##_cleanup, \ + sizeof(EVP_AES_##MODE##_CTX), \ + NULL,NULL,aes_##mode##_ctrl,NULL }; \ +static const EVP_CIPHER aes_##keylen##_##mode = { \ + nid##_##keylen##_##mode,blocksize, \ + (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE||EVP_CIPH_##MODE##_MODE==EVP_CIPH_SIV_MODE?2:1)*keylen/8, \ + ivlen, \ + flags|EVP_CIPH_##MODE##_MODE, \ + aes_##mode##_init_key, \ + aes_##mode##_cipher, \ + aes_##mode##_cleanup, \ + sizeof(EVP_AES_##MODE##_CTX), \ + NULL,NULL,aes_##mode##_ctrl,NULL }; \ +const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ +{ return SPARC_AES_CAPABLE?&aes_t4_##keylen##_##mode:&aes_##keylen##_##mode; } + +#elif defined(OPENSSL_CPUID_OBJ) && defined(__s390__) +/* + * IBM S390X support + */ +# include "s390x_arch.h" + +typedef struct { + union { + double align; + /*- + * KM-AES parameter block - begin + * (see z/Architecture Principles of Operation >= SA22-7832-06) + */ + struct { + unsigned char k[32]; + } param; + /* KM-AES parameter block - end */ + } km; + unsigned int fc; +} S390X_AES_ECB_CTX; + +typedef struct { + union { + double align; + /*- + * KMO-AES parameter block - begin + * (see z/Architecture Principles of Operation >= SA22-7832-08) + */ + struct { + unsigned char cv[16]; + unsigned char k[32]; + } param; + /* KMO-AES parameter block - end */ + } kmo; + unsigned int fc; + + int res; +} S390X_AES_OFB_CTX; + +typedef struct { + union { + double align; + /*- + * KMF-AES parameter block - begin + * (see z/Architecture Principles of Operation >= SA22-7832-08) + */ + struct { + unsigned char cv[16]; + unsigned char k[32]; + } param; + /* KMF-AES parameter block - end */ + } kmf; + unsigned int fc; + + int res; +} S390X_AES_CFB_CTX; + +typedef struct { + union { + double align; + /*- + * KMA-GCM-AES parameter block - begin + * (see z/Architecture Principles of Operation >= SA22-7832-11) + */ + struct { + unsigned char reserved[12]; + union { + unsigned int w; + unsigned char b[4]; + } cv; + union { + unsigned long long g[2]; + unsigned char b[16]; + } t; + unsigned char h[16]; + unsigned long long taadl; + unsigned long long tpcl; + union { + unsigned long long g[2]; + unsigned int w[4]; + } j0; + unsigned char k[32]; + } param; + /* KMA-GCM-AES parameter block - end */ + } kma; + unsigned int fc; + int key_set; + + unsigned char *iv; + int ivlen; + int iv_set; + int iv_gen; + + int taglen; + + unsigned char ares[16]; + unsigned char mres[16]; + unsigned char kres[16]; + int areslen; + int mreslen; + int kreslen; + + int tls_aad_len; + uint64_t tls_enc_records; /* Number of TLS records encrypted */ +} S390X_AES_GCM_CTX; + +typedef struct { + union { + double align; + /*- + * Padding is chosen so that ccm.kmac_param.k overlaps with key.k and + * ccm.fc with key.k.rounds. Remember that on s390x, an AES_KEY's + * rounds field is used to store the function code and that the key + * schedule is not stored (if aes hardware support is detected). + */ + struct { + unsigned char pad[16]; + AES_KEY k; + } key; + + struct { + /*- + * KMAC-AES parameter block - begin + * (see z/Architecture Principles of Operation >= SA22-7832-08) + */ + struct { + union { + unsigned long long g[2]; + unsigned char b[16]; + } icv; + unsigned char k[32]; + } kmac_param; + /* KMAC-AES paramater block - end */ + + union { + unsigned long long g[2]; + unsigned char b[16]; + } nonce; + union { + unsigned long long g[2]; + unsigned char b[16]; + } buf; + + unsigned long long blocks; + int l; + int m; + int tls_aad_len; + int iv_set; + int tag_set; + int len_set; + int key_set; + + unsigned char pad[140]; + unsigned int fc; + } ccm; + } aes; +} S390X_AES_CCM_CTX; + +/* Convert key size to function code: [16,24,32] -> [18,19,20]. */ +# define S390X_AES_FC(keylen) (S390X_AES_128 + ((((keylen) << 3) - 128) >> 6)) + +/* Most modes of operation need km for partial block processing. */ +# define S390X_aes_128_CAPABLE (OPENSSL_s390xcap_P.km[0] & \ + S390X_CAPBIT(S390X_AES_128)) +# define S390X_aes_192_CAPABLE (OPENSSL_s390xcap_P.km[0] & \ + S390X_CAPBIT(S390X_AES_192)) +# define S390X_aes_256_CAPABLE (OPENSSL_s390xcap_P.km[0] & \ + S390X_CAPBIT(S390X_AES_256)) + +# define s390x_aes_init_key aes_init_key +static int s390x_aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc); + +# define S390X_aes_128_cbc_CAPABLE 1 /* checked by callee */ +# define S390X_aes_192_cbc_CAPABLE 1 +# define S390X_aes_256_cbc_CAPABLE 1 +# define S390X_AES_CBC_CTX EVP_AES_KEY + +# define s390x_aes_cbc_init_key aes_init_key + +# define s390x_aes_cbc_cipher aes_cbc_cipher +static int s390x_aes_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len); + +# define S390X_aes_128_ecb_CAPABLE S390X_aes_128_CAPABLE +# define S390X_aes_192_ecb_CAPABLE S390X_aes_192_CAPABLE +# define S390X_aes_256_ecb_CAPABLE S390X_aes_256_CAPABLE + +static int s390x_aes_ecb_init_key(EVP_CIPHER_CTX *ctx, + const unsigned char *key, + const unsigned char *iv, int enc) +{ + S390X_AES_ECB_CTX *cctx = EVP_C_DATA(S390X_AES_ECB_CTX, ctx); + const int keylen = EVP_CIPHER_CTX_key_length(ctx); + + cctx->fc = S390X_AES_FC(keylen); + if (!enc) + cctx->fc |= S390X_DECRYPT; + + memcpy(cctx->km.param.k, key, keylen); + return 1; +} + +static int s390x_aes_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len) +{ + S390X_AES_ECB_CTX *cctx = EVP_C_DATA(S390X_AES_ECB_CTX, ctx); + + s390x_km(in, len, out, cctx->fc, &cctx->km.param); + return 1; +} + +# define S390X_aes_128_ofb_CAPABLE (S390X_aes_128_CAPABLE && \ + (OPENSSL_s390xcap_P.kmo[0] & \ + S390X_CAPBIT(S390X_AES_128))) +# define S390X_aes_192_ofb_CAPABLE (S390X_aes_192_CAPABLE && \ + (OPENSSL_s390xcap_P.kmo[0] & \ + S390X_CAPBIT(S390X_AES_192))) +# define S390X_aes_256_ofb_CAPABLE (S390X_aes_256_CAPABLE && \ + (OPENSSL_s390xcap_P.kmo[0] & \ + S390X_CAPBIT(S390X_AES_256))) + +static int s390x_aes_ofb_init_key(EVP_CIPHER_CTX *ctx, + const unsigned char *key, + const unsigned char *ivec, int enc) +{ + S390X_AES_OFB_CTX *cctx = EVP_C_DATA(S390X_AES_OFB_CTX, ctx); + const unsigned char *iv = EVP_CIPHER_CTX_original_iv(ctx); + const int keylen = EVP_CIPHER_CTX_key_length(ctx); + const int ivlen = EVP_CIPHER_CTX_iv_length(ctx); + + memcpy(cctx->kmo.param.cv, iv, ivlen); + memcpy(cctx->kmo.param.k, key, keylen); + cctx->fc = S390X_AES_FC(keylen); + cctx->res = 0; + return 1; +} + +static int s390x_aes_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len) +{ + S390X_AES_OFB_CTX *cctx = EVP_C_DATA(S390X_AES_OFB_CTX, ctx); + int n = cctx->res; + int rem; + + while (n && len) { + *out = *in ^ cctx->kmo.param.cv[n]; + n = (n + 1) & 0xf; + --len; + ++in; + ++out; + } + + rem = len & 0xf; + + len &= ~(size_t)0xf; + if (len) { + s390x_kmo(in, len, out, cctx->fc, &cctx->kmo.param); + + out += len; + in += len; + } + + if (rem) { + s390x_km(cctx->kmo.param.cv, 16, cctx->kmo.param.cv, cctx->fc, + cctx->kmo.param.k); + + while (rem--) { + out[n] = in[n] ^ cctx->kmo.param.cv[n]; + ++n; + } + } + + cctx->res = n; + return 1; +} + +# define S390X_aes_128_cfb_CAPABLE (S390X_aes_128_CAPABLE && \ + (OPENSSL_s390xcap_P.kmf[0] & \ + S390X_CAPBIT(S390X_AES_128))) +# define S390X_aes_192_cfb_CAPABLE (S390X_aes_192_CAPABLE && \ + (OPENSSL_s390xcap_P.kmf[0] & \ + S390X_CAPBIT(S390X_AES_192))) +# define S390X_aes_256_cfb_CAPABLE (S390X_aes_256_CAPABLE && \ + (OPENSSL_s390xcap_P.kmf[0] & \ + S390X_CAPBIT(S390X_AES_256))) + +static int s390x_aes_cfb_init_key(EVP_CIPHER_CTX *ctx, + const unsigned char *key, + const unsigned char *ivec, int enc) +{ + S390X_AES_CFB_CTX *cctx = EVP_C_DATA(S390X_AES_CFB_CTX, ctx); + const unsigned char *iv = EVP_CIPHER_CTX_original_iv(ctx); + const int keylen = EVP_CIPHER_CTX_key_length(ctx); + const int ivlen = EVP_CIPHER_CTX_iv_length(ctx); + + cctx->fc = S390X_AES_FC(keylen); + cctx->fc |= 16 << 24; /* 16 bytes cipher feedback */ + if (!enc) + cctx->fc |= S390X_DECRYPT; + + cctx->res = 0; + memcpy(cctx->kmf.param.cv, iv, ivlen); + memcpy(cctx->kmf.param.k, key, keylen); + return 1; +} + +static int s390x_aes_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len) +{ + S390X_AES_CFB_CTX *cctx = EVP_C_DATA(S390X_AES_CFB_CTX, ctx); + const int keylen = EVP_CIPHER_CTX_key_length(ctx); + const int enc = EVP_CIPHER_CTX_encrypting(ctx); + int n = cctx->res; + int rem; + unsigned char tmp; + + while (n && len) { + tmp = *in; + *out = cctx->kmf.param.cv[n] ^ tmp; + cctx->kmf.param.cv[n] = enc ? *out : tmp; + n = (n + 1) & 0xf; + --len; + ++in; + ++out; + } + + rem = len & 0xf; + + len &= ~(size_t)0xf; + if (len) { + s390x_kmf(in, len, out, cctx->fc, &cctx->kmf.param); + + out += len; + in += len; + } + + if (rem) { + s390x_km(cctx->kmf.param.cv, 16, cctx->kmf.param.cv, + S390X_AES_FC(keylen), cctx->kmf.param.k); + + while (rem--) { + tmp = in[n]; + out[n] = cctx->kmf.param.cv[n] ^ tmp; + cctx->kmf.param.cv[n] = enc ? out[n] : tmp; + ++n; + } + } + + cctx->res = n; + return 1; +} + +# define S390X_aes_128_cfb8_CAPABLE (OPENSSL_s390xcap_P.kmf[0] & \ + S390X_CAPBIT(S390X_AES_128)) +# define S390X_aes_192_cfb8_CAPABLE (OPENSSL_s390xcap_P.kmf[0] & \ + S390X_CAPBIT(S390X_AES_192)) +# define S390X_aes_256_cfb8_CAPABLE (OPENSSL_s390xcap_P.kmf[0] & \ + S390X_CAPBIT(S390X_AES_256)) + +static int s390x_aes_cfb8_init_key(EVP_CIPHER_CTX *ctx, + const unsigned char *key, + const unsigned char *ivec, int enc) +{ + S390X_AES_CFB_CTX *cctx = EVP_C_DATA(S390X_AES_CFB_CTX, ctx); + const unsigned char *iv = EVP_CIPHER_CTX_original_iv(ctx); + const int keylen = EVP_CIPHER_CTX_key_length(ctx); + const int ivlen = EVP_CIPHER_CTX_iv_length(ctx); + + cctx->fc = S390X_AES_FC(keylen); + cctx->fc |= 1 << 24; /* 1 byte cipher feedback */ + if (!enc) + cctx->fc |= S390X_DECRYPT; + + memcpy(cctx->kmf.param.cv, iv, ivlen); + memcpy(cctx->kmf.param.k, key, keylen); + return 1; +} + +static int s390x_aes_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len) +{ + S390X_AES_CFB_CTX *cctx = EVP_C_DATA(S390X_AES_CFB_CTX, ctx); + + s390x_kmf(in, len, out, cctx->fc, &cctx->kmf.param); + return 1; +} + +# define S390X_aes_128_cfb1_CAPABLE 0 +# define S390X_aes_192_cfb1_CAPABLE 0 +# define S390X_aes_256_cfb1_CAPABLE 0 + +# define s390x_aes_cfb1_init_key aes_init_key + +# define s390x_aes_cfb1_cipher aes_cfb1_cipher +static int s390x_aes_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len); + +# define S390X_aes_128_ctr_CAPABLE 1 /* checked by callee */ +# define S390X_aes_192_ctr_CAPABLE 1 +# define S390X_aes_256_ctr_CAPABLE 1 +# define S390X_AES_CTR_CTX EVP_AES_KEY + +# define s390x_aes_ctr_init_key aes_init_key + +# define s390x_aes_ctr_cipher aes_ctr_cipher +static int s390x_aes_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len); + +# define S390X_aes_128_gcm_CAPABLE (S390X_aes_128_CAPABLE && \ + (OPENSSL_s390xcap_P.kma[0] & \ + S390X_CAPBIT(S390X_AES_128))) +# define S390X_aes_192_gcm_CAPABLE (S390X_aes_192_CAPABLE && \ + (OPENSSL_s390xcap_P.kma[0] & \ + S390X_CAPBIT(S390X_AES_192))) +# define S390X_aes_256_gcm_CAPABLE (S390X_aes_256_CAPABLE && \ + (OPENSSL_s390xcap_P.kma[0] & \ + S390X_CAPBIT(S390X_AES_256))) + +/* iv + padding length for iv lenghts != 12 */ +# define S390X_gcm_ivpadlen(i) ((((i) + 15) >> 4 << 4) + 16) + +/*- + * Process additional authenticated data. Returns 0 on success. Code is + * big-endian. + */ +static int s390x_aes_gcm_aad(S390X_AES_GCM_CTX *ctx, const unsigned char *aad, + size_t len) +{ + unsigned long long alen; + int n, rem; + + if (ctx->kma.param.tpcl) + return -2; + + alen = ctx->kma.param.taadl + len; + if (alen > (U64(1) << 61) || (sizeof(len) == 8 && alen < len)) + return -1; + ctx->kma.param.taadl = alen; + + n = ctx->areslen; + if (n) { + while (n && len) { + ctx->ares[n] = *aad; + n = (n + 1) & 0xf; + ++aad; + --len; + } + /* ctx->ares contains a complete block if offset has wrapped around */ + if (!n) { + s390x_kma(ctx->ares, 16, NULL, 0, NULL, ctx->fc, &ctx->kma.param); + ctx->fc |= S390X_KMA_HS; + } + ctx->areslen = n; + } + + rem = len & 0xf; + + len &= ~(size_t)0xf; + if (len) { + s390x_kma(aad, len, NULL, 0, NULL, ctx->fc, &ctx->kma.param); + aad += len; + ctx->fc |= S390X_KMA_HS; + } + + if (rem) { + ctx->areslen = rem; + + do { + --rem; + ctx->ares[rem] = aad[rem]; + } while (rem); + } + return 0; +} + +/*- + * En/de-crypt plain/cipher-text and authenticate ciphertext. Returns 0 for + * success. Code is big-endian. + */ +static int s390x_aes_gcm(S390X_AES_GCM_CTX *ctx, const unsigned char *in, + unsigned char *out, size_t len) +{ + const unsigned char *inptr; + unsigned long long mlen; + union { + unsigned int w[4]; + unsigned char b[16]; + } buf; + size_t inlen; + int n, rem, i; + + mlen = ctx->kma.param.tpcl + len; + if (mlen > ((U64(1) << 36) - 32) || (sizeof(len) == 8 && mlen < len)) + return -1; + ctx->kma.param.tpcl = mlen; + + n = ctx->mreslen; + if (n) { + inptr = in; + inlen = len; + while (n && inlen) { + ctx->mres[n] = *inptr; + n = (n + 1) & 0xf; + ++inptr; + --inlen; + } + /* ctx->mres contains a complete block if offset has wrapped around */ + if (!n) { + s390x_kma(ctx->ares, ctx->areslen, ctx->mres, 16, buf.b, + ctx->fc | S390X_KMA_LAAD, &ctx->kma.param); + ctx->fc |= S390X_KMA_HS; + ctx->areslen = 0; + + /* previous call already encrypted/decrypted its remainder, + * see comment below */ + n = ctx->mreslen; + while (n) { + *out = buf.b[n]; + n = (n + 1) & 0xf; + ++out; + ++in; + --len; + } + ctx->mreslen = 0; + } + } + + rem = len & 0xf; + + len &= ~(size_t)0xf; + if (len) { + s390x_kma(ctx->ares, ctx->areslen, in, len, out, + ctx->fc | S390X_KMA_LAAD, &ctx->kma.param); + in += len; + out += len; + ctx->fc |= S390X_KMA_HS; + ctx->areslen = 0; + } + + /*- + * If there is a remainder, it has to be saved such that it can be + * processed by kma later. However, we also have to do the for-now + * unauthenticated encryption/decryption part here and now... + */ + if (rem) { + if (!ctx->mreslen) { + buf.w[0] = ctx->kma.param.j0.w[0]; + buf.w[1] = ctx->kma.param.j0.w[1]; + buf.w[2] = ctx->kma.param.j0.w[2]; + buf.w[3] = ctx->kma.param.cv.w + 1; + s390x_km(buf.b, 16, ctx->kres, ctx->fc & 0x1f, &ctx->kma.param.k); + } + + n = ctx->mreslen; + for (i = 0; i < rem; i++) { + ctx->mres[n + i] = in[i]; + out[i] = in[i] ^ ctx->kres[n + i]; + } + + ctx->mreslen += rem; + } + return 0; +} + +/*- + * Initialize context structure. Code is big-endian. + */ +static void s390x_aes_gcm_setiv(S390X_AES_GCM_CTX *ctx, + const unsigned char *iv) +{ + ctx->kma.param.t.g[0] = 0; + ctx->kma.param.t.g[1] = 0; + ctx->kma.param.tpcl = 0; + ctx->kma.param.taadl = 0; + ctx->mreslen = 0; + ctx->areslen = 0; + ctx->kreslen = 0; + + if (ctx->ivlen == 12) { + memcpy(&ctx->kma.param.j0, iv, ctx->ivlen); + ctx->kma.param.j0.w[3] = 1; + ctx->kma.param.cv.w = 1; + } else { + /* ctx->iv has the right size and is already padded. */ + memcpy(ctx->iv, iv, ctx->ivlen); + s390x_kma(ctx->iv, S390X_gcm_ivpadlen(ctx->ivlen), NULL, 0, NULL, + ctx->fc, &ctx->kma.param); + ctx->fc |= S390X_KMA_HS; + + ctx->kma.param.j0.g[0] = ctx->kma.param.t.g[0]; + ctx->kma.param.j0.g[1] = ctx->kma.param.t.g[1]; + ctx->kma.param.cv.w = ctx->kma.param.j0.w[3]; + ctx->kma.param.t.g[0] = 0; + ctx->kma.param.t.g[1] = 0; + } +} + +/*- + * Performs various operations on the context structure depending on control + * type. Returns 1 for success, 0 for failure and -1 for unknown control type. + * Code is big-endian. + */ +static int s390x_aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) +{ + S390X_AES_GCM_CTX *gctx = EVP_C_DATA(S390X_AES_GCM_CTX, c); + S390X_AES_GCM_CTX *gctx_out; + EVP_CIPHER_CTX *out; + unsigned char *buf, *iv; + int ivlen, enc, len; + + switch (type) { + case EVP_CTRL_INIT: + ivlen = EVP_CIPHER_CTX_iv_length(c); + iv = EVP_CIPHER_CTX_iv_noconst(c); + gctx->key_set = 0; + gctx->iv_set = 0; + gctx->ivlen = ivlen; + gctx->iv = iv; + gctx->taglen = -1; + gctx->iv_gen = 0; + gctx->tls_aad_len = -1; + return 1; + + case EVP_CTRL_AEAD_SET_IVLEN: + if (arg <= 0) + return 0; + + if (arg != 12) { + iv = EVP_CIPHER_CTX_iv_noconst(c); + len = S390X_gcm_ivpadlen(arg); + + /* Allocate memory for iv if needed. */ + if (gctx->ivlen == 12 || len > S390X_gcm_ivpadlen(gctx->ivlen)) { + if (gctx->iv != iv) + OPENSSL_free(gctx->iv); + + if ((gctx->iv = OPENSSL_malloc(len)) == NULL) { + EVPerr(EVP_F_S390X_AES_GCM_CTRL, ERR_R_MALLOC_FAILURE); + return 0; + } + } + /* Add padding. */ + memset(gctx->iv + arg, 0, len - arg - 8); + *((unsigned long long *)(gctx->iv + len - 8)) = arg << 3; + } + gctx->ivlen = arg; + return 1; + + case EVP_CTRL_AEAD_SET_TAG: + buf = EVP_CIPHER_CTX_buf_noconst(c); + enc = EVP_CIPHER_CTX_encrypting(c); + if (arg <= 0 || arg > 16 || enc) + return 0; + + memcpy(buf, ptr, arg); + gctx->taglen = arg; + return 1; + + case EVP_CTRL_AEAD_GET_TAG: + enc = EVP_CIPHER_CTX_encrypting(c); + if (arg <= 0 || arg > 16 || !enc || gctx->taglen < 0) + return 0; + + memcpy(ptr, gctx->kma.param.t.b, arg); + return 1; + + case EVP_CTRL_GCM_SET_IV_FIXED: + /* Special case: -1 length restores whole iv */ + if (arg == -1) { + memcpy(gctx->iv, ptr, gctx->ivlen); + gctx->iv_gen = 1; + return 1; + } + /* + * Fixed field must be at least 4 bytes and invocation field at least + * 8. + */ + if ((arg < 4) || (gctx->ivlen - arg) < 8) + return 0; + + if (arg) + memcpy(gctx->iv, ptr, arg); + + enc = EVP_CIPHER_CTX_encrypting(c); + if (enc && RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0) + return 0; + + gctx->iv_gen = 1; + return 1; + + case EVP_CTRL_GCM_IV_GEN: + if (gctx->iv_gen == 0 || gctx->key_set == 0) + return 0; + + s390x_aes_gcm_setiv(gctx, gctx->iv); + + if (arg <= 0 || arg > gctx->ivlen) + arg = gctx->ivlen; + + memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg); + /* + * Invocation field will be at least 8 bytes in size and so no need + * to check wrap around or increment more than last 8 bytes. + */ + ctr64_inc(gctx->iv + gctx->ivlen - 8); + gctx->iv_set = 1; + return 1; + + case EVP_CTRL_GCM_SET_IV_INV: + enc = EVP_CIPHER_CTX_encrypting(c); + if (gctx->iv_gen == 0 || gctx->key_set == 0 || enc) + return 0; + + memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg); + s390x_aes_gcm_setiv(gctx, gctx->iv); + gctx->iv_set = 1; + return 1; + + case EVP_CTRL_AEAD_TLS1_AAD: + /* Save the aad for later use. */ + if (arg != EVP_AEAD_TLS1_AAD_LEN) + return 0; + + buf = EVP_CIPHER_CTX_buf_noconst(c); + memcpy(buf, ptr, arg); + gctx->tls_aad_len = arg; + gctx->tls_enc_records = 0; + + len = buf[arg - 2] << 8 | buf[arg - 1]; + /* Correct length for explicit iv. */ + if (len < EVP_GCM_TLS_EXPLICIT_IV_LEN) + return 0; + len -= EVP_GCM_TLS_EXPLICIT_IV_LEN; + + /* If decrypting correct for tag too. */ + enc = EVP_CIPHER_CTX_encrypting(c); + if (!enc) { + if (len < EVP_GCM_TLS_TAG_LEN) + return 0; + len -= EVP_GCM_TLS_TAG_LEN; + } + buf[arg - 2] = len >> 8; + buf[arg - 1] = len & 0xff; + /* Extra padding: tag appended to record. */ + return EVP_GCM_TLS_TAG_LEN; + + case EVP_CTRL_COPY: + out = ptr; + gctx_out = EVP_C_DATA(S390X_AES_GCM_CTX, out); + iv = EVP_CIPHER_CTX_iv_noconst(c); + + if (gctx->iv == iv) { + gctx_out->iv = EVP_CIPHER_CTX_iv_noconst(out); + } else { + len = S390X_gcm_ivpadlen(gctx->ivlen); + + if ((gctx_out->iv = OPENSSL_malloc(len)) == NULL) { + EVPerr(EVP_F_S390X_AES_GCM_CTRL, ERR_R_MALLOC_FAILURE); + return 0; + } + + memcpy(gctx_out->iv, gctx->iv, len); + } + return 1; + + default: + return -1; + } +} + +/*- + * Set key and/or iv. Returns 1 on success. Otherwise 0 is returned. + */ +static int s390x_aes_gcm_init_key(EVP_CIPHER_CTX *ctx, + const unsigned char *key, + const unsigned char *iv, int enc) +{ + S390X_AES_GCM_CTX *gctx = EVP_C_DATA(S390X_AES_GCM_CTX, ctx); + int keylen; + + if (iv == NULL && key == NULL) + return 1; + + if (key != NULL) { + keylen = EVP_CIPHER_CTX_key_length(ctx); + memcpy(&gctx->kma.param.k, key, keylen); + + gctx->fc = S390X_AES_FC(keylen); + if (!enc) + gctx->fc |= S390X_DECRYPT; + + if (iv == NULL && gctx->iv_set) + iv = gctx->iv; + + if (iv != NULL) { + s390x_aes_gcm_setiv(gctx, iv); + gctx->iv_set = 1; + } + gctx->key_set = 1; + } else { + if (gctx->key_set) + s390x_aes_gcm_setiv(gctx, iv); + else + memcpy(gctx->iv, iv, gctx->ivlen); + + gctx->iv_set = 1; + gctx->iv_gen = 0; + } + return 1; +} + +/*- + * En/de-crypt and authenticate TLS packet. Returns the number of bytes written + * if successful. Otherwise -1 is returned. Code is big-endian. + */ +static int s390x_aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len) +{ + S390X_AES_GCM_CTX *gctx = EVP_C_DATA(S390X_AES_GCM_CTX, ctx); + const unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx); + const int enc = EVP_CIPHER_CTX_encrypting(ctx); + int rv = -1; + + if (out != in || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN)) + return -1; + + /* + * Check for too many keys as per FIPS 140-2 IG A.5 "Key/IV Pair Uniqueness + * Requirements from SP 800-38D". The requirements is for one party to the + * communication to fail after 2^64 - 1 keys. We do this on the encrypting + * side only. + */ + if (ctx->encrypt && ++gctx->tls_enc_records == 0) { + EVPerr(EVP_F_S390X_AES_GCM_TLS_CIPHER, EVP_R_TOO_MANY_RECORDS); + goto err; + } + + if (EVP_CIPHER_CTX_ctrl(ctx, enc ? EVP_CTRL_GCM_IV_GEN + : EVP_CTRL_GCM_SET_IV_INV, + EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0) + goto err; + + in += EVP_GCM_TLS_EXPLICIT_IV_LEN; + out += EVP_GCM_TLS_EXPLICIT_IV_LEN; + len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; + + gctx->kma.param.taadl = gctx->tls_aad_len << 3; + gctx->kma.param.tpcl = len << 3; + s390x_kma(buf, gctx->tls_aad_len, in, len, out, + gctx->fc | S390X_KMA_LAAD | S390X_KMA_LPC, &gctx->kma.param); + + if (enc) { + memcpy(out + len, gctx->kma.param.t.b, EVP_GCM_TLS_TAG_LEN); + rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; + } else { + if (CRYPTO_memcmp(gctx->kma.param.t.b, in + len, + EVP_GCM_TLS_TAG_LEN)) { + OPENSSL_cleanse(out, len); + goto err; + } + rv = len; + } +err: + gctx->iv_set = 0; + gctx->tls_aad_len = -1; + return rv; +} + +/*- + * Called from EVP layer to initialize context, process additional + * authenticated data, en/de-crypt plain/cipher-text and authenticate + * ciphertext or process a TLS packet, depending on context. Returns bytes + * written on success. Otherwise -1 is returned. Code is big-endian. + */ +static int s390x_aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len) +{ + S390X_AES_GCM_CTX *gctx = EVP_C_DATA(S390X_AES_GCM_CTX, ctx); + unsigned char *buf, tmp[16]; + int enc; + + if (!gctx->key_set) + return -1; + + if (gctx->tls_aad_len >= 0) + return s390x_aes_gcm_tls_cipher(ctx, out, in, len); + + if (!gctx->iv_set) + return -1; + + if (in != NULL) { + if (out == NULL) { + if (s390x_aes_gcm_aad(gctx, in, len)) + return -1; + } else { + if (s390x_aes_gcm(gctx, in, out, len)) + return -1; + } + return len; + } else { + gctx->kma.param.taadl <<= 3; + gctx->kma.param.tpcl <<= 3; + s390x_kma(gctx->ares, gctx->areslen, gctx->mres, gctx->mreslen, tmp, + gctx->fc | S390X_KMA_LAAD | S390X_KMA_LPC, &gctx->kma.param); + /* recall that we already did en-/decrypt gctx->mres + * and returned it to caller... */ + OPENSSL_cleanse(tmp, gctx->mreslen); + gctx->iv_set = 0; + + enc = EVP_CIPHER_CTX_encrypting(ctx); + if (enc) { + gctx->taglen = 16; + } else { + if (gctx->taglen < 0) + return -1; + + buf = EVP_CIPHER_CTX_buf_noconst(ctx); + if (CRYPTO_memcmp(buf, gctx->kma.param.t.b, gctx->taglen)) + return -1; + } + return 0; + } +} + +static int s390x_aes_gcm_cleanup(EVP_CIPHER_CTX *c) +{ + S390X_AES_GCM_CTX *gctx = EVP_C_DATA(S390X_AES_GCM_CTX, c); + const unsigned char *iv; + + if (gctx == NULL) + return 0; + + iv = EVP_CIPHER_CTX_iv(c); + if (iv != gctx->iv) + OPENSSL_free(gctx->iv); + + OPENSSL_cleanse(gctx, sizeof(*gctx)); + return 1; +} + +# define S390X_AES_XTS_CTX EVP_AES_XTS_CTX +# define S390X_aes_128_xts_CAPABLE 1 /* checked by callee */ +# define S390X_aes_256_xts_CAPABLE 1 + +# define s390x_aes_xts_init_key aes_xts_init_key +static int s390x_aes_xts_init_key(EVP_CIPHER_CTX *ctx, + const unsigned char *key, + const unsigned char *iv, int enc); +# define s390x_aes_xts_cipher aes_xts_cipher +static int s390x_aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len); +# define s390x_aes_xts_ctrl aes_xts_ctrl +static int s390x_aes_xts_ctrl(EVP_CIPHER_CTX *, int type, int arg, void *ptr); +# define s390x_aes_xts_cleanup aes_xts_cleanup + +# define S390X_aes_128_ccm_CAPABLE (S390X_aes_128_CAPABLE && \ + (OPENSSL_s390xcap_P.kmac[0] & \ + S390X_CAPBIT(S390X_AES_128))) +# define S390X_aes_192_ccm_CAPABLE (S390X_aes_192_CAPABLE && \ + (OPENSSL_s390xcap_P.kmac[0] & \ + S390X_CAPBIT(S390X_AES_192))) +# define S390X_aes_256_ccm_CAPABLE (S390X_aes_256_CAPABLE && \ + (OPENSSL_s390xcap_P.kmac[0] & \ + S390X_CAPBIT(S390X_AES_256))) + +# define S390X_CCM_AAD_FLAG 0x40 + +/*- + * Set nonce and length fields. Code is big-endian. + */ +static inline void s390x_aes_ccm_setiv(S390X_AES_CCM_CTX *ctx, + const unsigned char *nonce, + size_t mlen) +{ + ctx->aes.ccm.nonce.b[0] &= ~S390X_CCM_AAD_FLAG; + ctx->aes.ccm.nonce.g[1] = mlen; + memcpy(ctx->aes.ccm.nonce.b + 1, nonce, 15 - ctx->aes.ccm.l); +} + +/*- + * Process additional authenticated data. Code is big-endian. + */ +static void s390x_aes_ccm_aad(S390X_AES_CCM_CTX *ctx, const unsigned char *aad, + size_t alen) +{ + unsigned char *ptr; + int i, rem; + + if (!alen) + return; + + ctx->aes.ccm.nonce.b[0] |= S390X_CCM_AAD_FLAG; + + /* Suppress 'type-punned pointer dereference' warning. */ + ptr = ctx->aes.ccm.buf.b; + + if (alen < ((1 << 16) - (1 << 8))) { + *(uint16_t *)ptr = alen; + i = 2; + } else if (sizeof(alen) == 8 + && alen >= (size_t)1 << (32 % (sizeof(alen) * 8))) { + *(uint16_t *)ptr = 0xffff; + *(uint64_t *)(ptr + 2) = alen; + i = 10; + } else { + *(uint16_t *)ptr = 0xfffe; + *(uint32_t *)(ptr + 2) = alen; + i = 6; + } + + while (i < 16 && alen) { + ctx->aes.ccm.buf.b[i] = *aad; + ++aad; + --alen; + ++i; + } + while (i < 16) { + ctx->aes.ccm.buf.b[i] = 0; + ++i; + } + + ctx->aes.ccm.kmac_param.icv.g[0] = 0; + ctx->aes.ccm.kmac_param.icv.g[1] = 0; + s390x_kmac(ctx->aes.ccm.nonce.b, 32, ctx->aes.ccm.fc, + &ctx->aes.ccm.kmac_param); + ctx->aes.ccm.blocks += 2; + + rem = alen & 0xf; + alen &= ~(size_t)0xf; + if (alen) { + s390x_kmac(aad, alen, ctx->aes.ccm.fc, &ctx->aes.ccm.kmac_param); + ctx->aes.ccm.blocks += alen >> 4; + aad += alen; + } + if (rem) { + for (i = 0; i < rem; i++) + ctx->aes.ccm.kmac_param.icv.b[i] ^= aad[i]; + + s390x_km(ctx->aes.ccm.kmac_param.icv.b, 16, + ctx->aes.ccm.kmac_param.icv.b, ctx->aes.ccm.fc, + ctx->aes.ccm.kmac_param.k); + ctx->aes.ccm.blocks++; + } +} + +/*- + * En/de-crypt plain/cipher-text. Compute tag from plaintext. Returns 0 for + * success. + */ +static int s390x_aes_ccm(S390X_AES_CCM_CTX *ctx, const unsigned char *in, + unsigned char *out, size_t len, int enc) +{ + size_t n, rem; + unsigned int i, l, num; + unsigned char flags; + + flags = ctx->aes.ccm.nonce.b[0]; + if (!(flags & S390X_CCM_AAD_FLAG)) { + s390x_km(ctx->aes.ccm.nonce.b, 16, ctx->aes.ccm.kmac_param.icv.b, + ctx->aes.ccm.fc, ctx->aes.ccm.kmac_param.k); + ctx->aes.ccm.blocks++; + } + l = flags & 0x7; + ctx->aes.ccm.nonce.b[0] = l; + + /*- + * Reconstruct length from encoded length field + * and initialize it with counter value. + */ + n = 0; + for (i = 15 - l; i < 15; i++) { + n |= ctx->aes.ccm.nonce.b[i]; + ctx->aes.ccm.nonce.b[i] = 0; + n <<= 8; + } + n |= ctx->aes.ccm.nonce.b[15]; + ctx->aes.ccm.nonce.b[15] = 1; + + if (n != len) + return -1; /* length mismatch */ + + if (enc) { + /* Two operations per block plus one for tag encryption */ + ctx->aes.ccm.blocks += (((len + 15) >> 4) << 1) + 1; + if (ctx->aes.ccm.blocks > (1ULL << 61)) + return -2; /* too much data */ + } + + num = 0; + rem = len & 0xf; + len &= ~(size_t)0xf; + + if (enc) { + /* mac-then-encrypt */ + if (len) + s390x_kmac(in, len, ctx->aes.ccm.fc, &ctx->aes.ccm.kmac_param); + if (rem) { + for (i = 0; i < rem; i++) + ctx->aes.ccm.kmac_param.icv.b[i] ^= in[len + i]; + + s390x_km(ctx->aes.ccm.kmac_param.icv.b, 16, + ctx->aes.ccm.kmac_param.icv.b, ctx->aes.ccm.fc, + ctx->aes.ccm.kmac_param.k); + } + + CRYPTO_ctr128_encrypt_ctr32(in, out, len + rem, &ctx->aes.key.k, + ctx->aes.ccm.nonce.b, ctx->aes.ccm.buf.b, + &num, (ctr128_f)AES_ctr32_encrypt); + } else { + /* decrypt-then-mac */ + CRYPTO_ctr128_encrypt_ctr32(in, out, len + rem, &ctx->aes.key.k, + ctx->aes.ccm.nonce.b, ctx->aes.ccm.buf.b, + &num, (ctr128_f)AES_ctr32_encrypt); + + if (len) + s390x_kmac(out, len, ctx->aes.ccm.fc, &ctx->aes.ccm.kmac_param); + if (rem) { + for (i = 0; i < rem; i++) + ctx->aes.ccm.kmac_param.icv.b[i] ^= out[len + i]; + + s390x_km(ctx->aes.ccm.kmac_param.icv.b, 16, + ctx->aes.ccm.kmac_param.icv.b, ctx->aes.ccm.fc, + ctx->aes.ccm.kmac_param.k); + } + } + /* encrypt tag */ + for (i = 15 - l; i < 16; i++) + ctx->aes.ccm.nonce.b[i] = 0; + + s390x_km(ctx->aes.ccm.nonce.b, 16, ctx->aes.ccm.buf.b, ctx->aes.ccm.fc, + ctx->aes.ccm.kmac_param.k); + ctx->aes.ccm.kmac_param.icv.g[0] ^= ctx->aes.ccm.buf.g[0]; + ctx->aes.ccm.kmac_param.icv.g[1] ^= ctx->aes.ccm.buf.g[1]; + + ctx->aes.ccm.nonce.b[0] = flags; /* restore flags field */ + return 0; +} + +/*- + * En/de-crypt and authenticate TLS packet. Returns the number of bytes written + * if successful. Otherwise -1 is returned. + */ +static int s390x_aes_ccm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len) +{ + S390X_AES_CCM_CTX *cctx = EVP_C_DATA(S390X_AES_CCM_CTX, ctx); + unsigned char *ivec = EVP_CIPHER_CTX_iv_noconst(ctx); + unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx); + const int enc = EVP_CIPHER_CTX_encrypting(ctx); + + if (out != in + || len < (EVP_CCM_TLS_EXPLICIT_IV_LEN + (size_t)cctx->aes.ccm.m)) + return -1; + + if (enc) { + /* Set explicit iv (sequence number). */ + memcpy(out, buf, EVP_CCM_TLS_EXPLICIT_IV_LEN); + } + + len -= EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->aes.ccm.m; + /*- + * Get explicit iv (sequence number). We already have fixed iv + * (server/client_write_iv) here. + */ + memcpy(ivec + EVP_CCM_TLS_FIXED_IV_LEN, in, EVP_CCM_TLS_EXPLICIT_IV_LEN); + s390x_aes_ccm_setiv(cctx, ivec, len); + + /* Process aad (sequence number|type|version|length) */ + s390x_aes_ccm_aad(cctx, buf, cctx->aes.ccm.tls_aad_len); + + in += EVP_CCM_TLS_EXPLICIT_IV_LEN; + out += EVP_CCM_TLS_EXPLICIT_IV_LEN; + + if (enc) { + if (s390x_aes_ccm(cctx, in, out, len, enc)) + return -1; + + memcpy(out + len, cctx->aes.ccm.kmac_param.icv.b, cctx->aes.ccm.m); + return len + EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->aes.ccm.m; + } else { + if (!s390x_aes_ccm(cctx, in, out, len, enc)) { + if (!CRYPTO_memcmp(cctx->aes.ccm.kmac_param.icv.b, in + len, + cctx->aes.ccm.m)) + return len; + } + + OPENSSL_cleanse(out, len); + return -1; + } +} + +/*- + * Set key and flag field and/or iv. Returns 1 if successful. Otherwise 0 is + * returned. + */ +static int s390x_aes_ccm_init_key(EVP_CIPHER_CTX *ctx, + const unsigned char *key, + const unsigned char *iv, int enc) +{ + S390X_AES_CCM_CTX *cctx = EVP_C_DATA(S390X_AES_CCM_CTX, ctx); + unsigned char *ivec; + int keylen; + + if (iv == NULL && key == NULL) + return 1; + + if (key != NULL) { + keylen = EVP_CIPHER_CTX_key_length(ctx); + cctx->aes.ccm.fc = S390X_AES_FC(keylen); + memcpy(cctx->aes.ccm.kmac_param.k, key, keylen); + + /* Store encoded m and l. */ + cctx->aes.ccm.nonce.b[0] = ((cctx->aes.ccm.l - 1) & 0x7) + | (((cctx->aes.ccm.m - 2) >> 1) & 0x7) << 3; + memset(cctx->aes.ccm.nonce.b + 1, 0, + sizeof(cctx->aes.ccm.nonce.b)); + cctx->aes.ccm.blocks = 0; + + cctx->aes.ccm.key_set = 1; + } + + if (iv != NULL) { + ivec = EVP_CIPHER_CTX_iv_noconst(ctx); + memcpy(ivec, iv, 15 - cctx->aes.ccm.l); + + cctx->aes.ccm.iv_set = 1; + } + + return 1; +} + +/*- + * Called from EVP layer to initialize context, process additional + * authenticated data, en/de-crypt plain/cipher-text and authenticate + * plaintext or process a TLS packet, depending on context. Returns bytes + * written on success. Otherwise -1 is returned. + */ +static int s390x_aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len) +{ + S390X_AES_CCM_CTX *cctx = EVP_C_DATA(S390X_AES_CCM_CTX, ctx); + const int enc = EVP_CIPHER_CTX_encrypting(ctx); + int rv; + unsigned char *buf, *ivec; + + if (!cctx->aes.ccm.key_set) + return -1; + + if (cctx->aes.ccm.tls_aad_len >= 0) + return s390x_aes_ccm_tls_cipher(ctx, out, in, len); + + /*- + * Final(): Does not return any data. Recall that ccm is mac-then-encrypt + * so integrity must be checked already at Update() i.e., before + * potentially corrupted data is output. + */ + if (in == NULL && out != NULL) + return 0; + + if (!cctx->aes.ccm.iv_set) + return -1; + + if (!enc && !cctx->aes.ccm.tag_set) + return -1; + + if (out == NULL) { + /* Update(): Pass message length. */ + if (in == NULL) { + ivec = EVP_CIPHER_CTX_iv_noconst(ctx); + s390x_aes_ccm_setiv(cctx, ivec, len); + + cctx->aes.ccm.len_set = 1; + return len; + } + + /* Update(): Process aad. */ + if (!cctx->aes.ccm.len_set && len) + return -1; + + s390x_aes_ccm_aad(cctx, in, len); + return len; + } + + /* Update(): Process message. */ + + if (!cctx->aes.ccm.len_set) { + /*- + * In case message length was not previously set explicitly via + * Update(), set it now. + */ + ivec = EVP_CIPHER_CTX_iv_noconst(ctx); + s390x_aes_ccm_setiv(cctx, ivec, len); + + cctx->aes.ccm.len_set = 1; + } + + if (enc) { + if (s390x_aes_ccm(cctx, in, out, len, enc)) + return -1; + + cctx->aes.ccm.tag_set = 1; + return len; + } else { + rv = -1; + + if (!s390x_aes_ccm(cctx, in, out, len, enc)) { + buf = EVP_CIPHER_CTX_buf_noconst(ctx); + if (!CRYPTO_memcmp(cctx->aes.ccm.kmac_param.icv.b, buf, + cctx->aes.ccm.m)) + rv = len; + } + + if (rv == -1) + OPENSSL_cleanse(out, len); + + cctx->aes.ccm.iv_set = 0; + cctx->aes.ccm.tag_set = 0; + cctx->aes.ccm.len_set = 0; + return rv; + } +} + +/*- + * Performs various operations on the context structure depending on control + * type. Returns 1 for success, 0 for failure and -1 for unknown control type. + * Code is big-endian. + */ +static int s390x_aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) +{ + S390X_AES_CCM_CTX *cctx = EVP_C_DATA(S390X_AES_CCM_CTX, c); + unsigned char *buf, *iv; + int enc, len; + + switch (type) { + case EVP_CTRL_INIT: + cctx->aes.ccm.key_set = 0; + cctx->aes.ccm.iv_set = 0; + cctx->aes.ccm.l = 8; + cctx->aes.ccm.m = 12; + cctx->aes.ccm.tag_set = 0; + cctx->aes.ccm.len_set = 0; + cctx->aes.ccm.tls_aad_len = -1; + return 1; + + case EVP_CTRL_AEAD_TLS1_AAD: + if (arg != EVP_AEAD_TLS1_AAD_LEN) + return 0; + + /* Save the aad for later use. */ + buf = EVP_CIPHER_CTX_buf_noconst(c); + memcpy(buf, ptr, arg); + cctx->aes.ccm.tls_aad_len = arg; + + len = buf[arg - 2] << 8 | buf[arg - 1]; + if (len < EVP_CCM_TLS_EXPLICIT_IV_LEN) + return 0; + + /* Correct length for explicit iv. */ + len -= EVP_CCM_TLS_EXPLICIT_IV_LEN; + + enc = EVP_CIPHER_CTX_encrypting(c); + if (!enc) { + if (len < cctx->aes.ccm.m) + return 0; + + /* Correct length for tag. */ + len -= cctx->aes.ccm.m; + } + + buf[arg - 2] = len >> 8; + buf[arg - 1] = len & 0xff; + + /* Extra padding: tag appended to record. */ + return cctx->aes.ccm.m; + + case EVP_CTRL_CCM_SET_IV_FIXED: + if (arg != EVP_CCM_TLS_FIXED_IV_LEN) + return 0; + + /* Copy to first part of the iv. */ + iv = EVP_CIPHER_CTX_iv_noconst(c); + memcpy(iv, ptr, arg); + return 1; + + case EVP_CTRL_AEAD_SET_IVLEN: + arg = 15 - arg; + /* fall-through */ - xctx->xts.key1 = &xctx->ks1; - } + case EVP_CTRL_CCM_SET_L: + if (arg < 2 || arg > 8) + return 0; - if (iv) { - xctx->xts.key2 = &xctx->ks2; - memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, 16); - } + cctx->aes.ccm.l = arg; + return 1; - return 1; -} + case EVP_CTRL_AEAD_SET_TAG: + if ((arg & 1) || arg < 4 || arg > 16) + return 0; -# define aes_t4_xts_cipher aes_xts_cipher -static int aes_t4_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, - const unsigned char *in, size_t len); + enc = EVP_CIPHER_CTX_encrypting(c); + if (enc && ptr) + return 0; -static int aes_t4_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, - const unsigned char *iv, int enc) -{ - EVP_AES_CCM_CTX *cctx = EVP_C_DATA(EVP_AES_CCM_CTX,ctx); - if (!iv && !key) + if (ptr) { + cctx->aes.ccm.tag_set = 1; + buf = EVP_CIPHER_CTX_buf_noconst(c); + memcpy(buf, ptr, arg); + } + + cctx->aes.ccm.m = arg; return 1; - if (key) { - int bits = EVP_CIPHER_CTX_key_length(ctx) * 8; - aes_t4_set_encrypt_key(key, bits, &cctx->ks.ks); - CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, - &cctx->ks, (block128_f) aes_t4_encrypt); - cctx->str = NULL; - cctx->key_set = 1; - } - if (iv) { - memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, 15 - cctx->L); - cctx->iv_set = 1; - } - return 1; -} -# define aes_t4_ccm_cipher aes_ccm_cipher -static int aes_t4_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, - const unsigned char *in, size_t len); + case EVP_CTRL_AEAD_GET_TAG: + enc = EVP_CIPHER_CTX_encrypting(c); + if (!enc || !cctx->aes.ccm.tag_set) + return 0; -# ifndef OPENSSL_NO_OCB -static int aes_t4_ocb_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, - const unsigned char *iv, int enc) -{ - EVP_AES_OCB_CTX *octx = EVP_C_DATA(EVP_AES_OCB_CTX,ctx); - if (!iv && !key) + if(arg < cctx->aes.ccm.m) + return 0; + + memcpy(ptr, cctx->aes.ccm.kmac_param.icv.b, cctx->aes.ccm.m); + cctx->aes.ccm.tag_set = 0; + cctx->aes.ccm.iv_set = 0; + cctx->aes.ccm.len_set = 0; return 1; - if (key) { - do { - /* - * We set both the encrypt and decrypt key here because decrypt - * needs both. We could possibly optimise to remove setting the - * decrypt for an encryption operation. - */ - aes_t4_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, - &octx->ksenc.ks); - aes_t4_set_decrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, - &octx->ksdec.ks); - if (!CRYPTO_ocb128_init(&octx->ocb, - &octx->ksenc.ks, &octx->ksdec.ks, - (block128_f) aes_t4_encrypt, - (block128_f) aes_t4_decrypt, - NULL)) - return 0; - } - while (0); - /* - * If we have an iv we can set it directly, otherwise use saved IV. - */ - if (iv == NULL && octx->iv_set) - iv = octx->iv; - if (iv) { - if (CRYPTO_ocb128_setiv(&octx->ocb, iv, octx->ivlen, octx->taglen) - != 1) - return 0; - octx->iv_set = 1; - } - octx->key_set = 1; - } else { - /* If key set use IV, otherwise copy */ - if (octx->key_set) - CRYPTO_ocb128_setiv(&octx->ocb, iv, octx->ivlen, octx->taglen); - else - memcpy(octx->iv, iv, octx->ivlen); - octx->iv_set = 1; + case EVP_CTRL_COPY: + return 1; + + default: + return -1; } - return 1; } -# define aes_t4_ocb_cipher aes_ocb_cipher -static int aes_t4_ocb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, - const unsigned char *in, size_t len); -# endif /* OPENSSL_NO_OCB */ +# define s390x_aes_ccm_cleanup aes_ccm_cleanup -# define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ -static const EVP_CIPHER aes_t4_##keylen##_##mode = { \ - nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \ - flags|EVP_CIPH_##MODE##_MODE, \ - aes_t4_init_key, \ - aes_t4_##mode##_cipher, \ - NULL, \ - sizeof(EVP_AES_KEY), \ - NULL,NULL,NULL,NULL }; \ -static const EVP_CIPHER aes_##keylen##_##mode = { \ - nid##_##keylen##_##nmode,blocksize, \ - keylen/8,ivlen, \ - flags|EVP_CIPH_##MODE##_MODE, \ - aes_init_key, \ - aes_##mode##_cipher, \ - NULL, \ - sizeof(EVP_AES_KEY), \ - NULL,NULL,NULL,NULL }; \ -const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ -{ return SPARC_AES_CAPABLE?&aes_t4_##keylen##_##mode:&aes_##keylen##_##mode; } +# ifndef OPENSSL_NO_OCB +# define S390X_AES_OCB_CTX EVP_AES_OCB_CTX +# define S390X_aes_128_ocb_CAPABLE 0 +# define S390X_aes_192_ocb_CAPABLE 0 +# define S390X_aes_256_ocb_CAPABLE 0 + +# define s390x_aes_ocb_init_key aes_ocb_init_key +static int s390x_aes_ocb_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc); +# define s390x_aes_ocb_cipher aes_ocb_cipher +static int s390x_aes_ocb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len); +# define s390x_aes_ocb_cleanup aes_ocb_cleanup +static int s390x_aes_ocb_cleanup(EVP_CIPHER_CTX *); +# define s390x_aes_ocb_ctrl aes_ocb_ctrl +static int s390x_aes_ocb_ctrl(EVP_CIPHER_CTX *, int type, int arg, void *ptr); +# endif -# define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \ -static const EVP_CIPHER aes_t4_##keylen##_##mode = { \ - nid##_##keylen##_##mode,blocksize, \ - (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ - flags|EVP_CIPH_##MODE##_MODE, \ - aes_t4_##mode##_init_key, \ - aes_t4_##mode##_cipher, \ - aes_##mode##_cleanup, \ - sizeof(EVP_AES_##MODE##_CTX), \ - NULL,NULL,aes_##mode##_ctrl,NULL }; \ -static const EVP_CIPHER aes_##keylen##_##mode = { \ - nid##_##keylen##_##mode,blocksize, \ - (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ - flags|EVP_CIPH_##MODE##_MODE, \ - aes_##mode##_init_key, \ - aes_##mode##_cipher, \ - aes_##mode##_cleanup, \ - sizeof(EVP_AES_##MODE##_CTX), \ - NULL,NULL,aes_##mode##_ctrl,NULL }; \ -const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ -{ return SPARC_AES_CAPABLE?&aes_t4_##keylen##_##mode:&aes_##keylen##_##mode; } +# ifndef OPENSSL_NO_SIV +# define S390X_AES_SIV_CTX EVP_AES_SIV_CTX +# define S390X_aes_128_siv_CAPABLE 0 +# define S390X_aes_192_siv_CAPABLE 0 +# define S390X_aes_256_siv_CAPABLE 0 + +# define s390x_aes_siv_init_key aes_siv_init_key +# define s390x_aes_siv_cipher aes_siv_cipher +# define s390x_aes_siv_cleanup aes_siv_cleanup +# define s390x_aes_siv_ctrl aes_siv_ctrl +# endif + +# define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode, \ + MODE,flags) \ +static const EVP_CIPHER s390x_aes_##keylen##_##mode = { \ + nid##_##keylen##_##nmode,blocksize, \ + keylen / 8, \ + ivlen, \ + flags | EVP_CIPH_##MODE##_MODE, \ + s390x_aes_##mode##_init_key, \ + s390x_aes_##mode##_cipher, \ + NULL, \ + sizeof(S390X_AES_##MODE##_CTX), \ + NULL, \ + NULL, \ + NULL, \ + NULL \ +}; \ +static const EVP_CIPHER aes_##keylen##_##mode = { \ + nid##_##keylen##_##nmode, \ + blocksize, \ + keylen / 8, \ + ivlen, \ + flags | EVP_CIPH_##MODE##_MODE, \ + aes_init_key, \ + aes_##mode##_cipher, \ + NULL, \ + sizeof(EVP_AES_KEY), \ + NULL, \ + NULL, \ + NULL, \ + NULL \ +}; \ +const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ +{ \ + return S390X_aes_##keylen##_##mode##_CAPABLE ? \ + &s390x_aes_##keylen##_##mode : &aes_##keylen##_##mode; \ +} + +# define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags)\ +static const EVP_CIPHER s390x_aes_##keylen##_##mode = { \ + nid##_##keylen##_##mode, \ + blocksize, \ + (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE||EVP_CIPH_##MODE##_MODE==EVP_CIPH_SIV_MODE ? 2 : 1) * keylen / 8, \ + ivlen, \ + flags | EVP_CIPH_##MODE##_MODE, \ + s390x_aes_##mode##_init_key, \ + s390x_aes_##mode##_cipher, \ + s390x_aes_##mode##_cleanup, \ + sizeof(S390X_AES_##MODE##_CTX), \ + NULL, \ + NULL, \ + s390x_aes_##mode##_ctrl, \ + NULL \ +}; \ +static const EVP_CIPHER aes_##keylen##_##mode = { \ + nid##_##keylen##_##mode,blocksize, \ + (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE||EVP_CIPH_##MODE##_MODE==EVP_CIPH_SIV_MODE ? 2 : 1) * keylen / 8, \ + ivlen, \ + flags | EVP_CIPH_##MODE##_MODE, \ + aes_##mode##_init_key, \ + aes_##mode##_cipher, \ + aes_##mode##_cleanup, \ + sizeof(EVP_AES_##MODE##_CTX), \ + NULL, \ + NULL, \ + aes_##mode##_ctrl, \ + NULL \ +}; \ +const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ +{ \ + return S390X_aes_##keylen##_##mode##_CAPABLE ? \ + &s390x_aes_##keylen##_##mode : &aes_##keylen##_##mode; \ +} #else @@ -967,7 +2529,8 @@ const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ # define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \ static const EVP_CIPHER aes_##keylen##_##mode = { \ nid##_##keylen##_##mode,blocksize, \ - (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ + (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE||EVP_CIPH_##MODE##_MODE==EVP_CIPH_SIV_MODE?2:1)*keylen/8, \ + ivlen, \ flags|EVP_CIPH_##MODE##_MODE, \ aes_##mode##_init_key, \ aes_##mode##_cipher, \ @@ -1229,6 +2792,8 @@ static int aes_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, EVP_CIPHER_CTX_encrypting(ctx), dat->block); EVP_CIPHER_CTX_set_num(ctx, num); len -= MAXBITCHUNK; + out += MAXBITCHUNK; + in += MAXBITCHUNK; } if (len) { int num = EVP_CIPHER_CTX_num(ctx); @@ -1268,28 +2833,14 @@ BLOCK_CIPHER_generic_pack(NID_aes, 128, 0) static int aes_gcm_cleanup(EVP_CIPHER_CTX *c) { EVP_AES_GCM_CTX *gctx = EVP_C_DATA(EVP_AES_GCM_CTX,c); + if (gctx == NULL) + return 0; OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm)); if (gctx->iv != EVP_CIPHER_CTX_iv_noconst(c)) OPENSSL_free(gctx->iv); return 1; } -/* increment counter (64-bit int) by 1 */ -static void ctr64_inc(unsigned char *counter) -{ - int n = 8; - unsigned char c; - - do { - --n; - c = counter[n]; - ++c; - counter[n] = c; - if (c) - return; - } while (n); -} - static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) { EVP_AES_GCM_CTX *gctx = EVP_C_DATA(EVP_AES_GCM_CTX,c); @@ -1297,8 +2848,8 @@ static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) case EVP_CTRL_INIT: gctx->key_set = 0; gctx->iv_set = 0; - gctx->ivlen = EVP_CIPHER_CTX_iv_length(c); - gctx->iv = EVP_CIPHER_CTX_iv_noconst(c); + gctx->ivlen = c->cipher->iv_len; + gctx->iv = c->iv; gctx->taglen = -1; gctx->iv_gen = 0; gctx->tls_aad_len = -1; @@ -1309,27 +2860,36 @@ static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) return 0; /* Allocate memory for IV if needed */ if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) { - if (gctx->iv != EVP_CIPHER_CTX_iv_noconst(c)) + if (gctx->iv != c->iv) OPENSSL_free(gctx->iv); - gctx->iv = OPENSSL_malloc(arg); - if (gctx->iv == NULL) + if ((gctx->iv = OPENSSL_malloc(arg)) == NULL) { + EVPerr(EVP_F_AES_GCM_CTRL, ERR_R_MALLOC_FAILURE); return 0; + } } gctx->ivlen = arg; return 1; case EVP_CTRL_AEAD_SET_TAG: - if (arg <= 0 || arg > 16 || EVP_CIPHER_CTX_encrypting(c)) + if (arg <= 0 || arg > 16 || c->encrypt) return 0; - memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); + memcpy(c->buf, ptr, arg); gctx->taglen = arg; return 1; case EVP_CTRL_AEAD_GET_TAG: - if (arg <= 0 || arg > 16 || !EVP_CIPHER_CTX_encrypting(c) + if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0) return 0; - memcpy(ptr, EVP_CIPHER_CTX_buf_noconst(c), arg); + memcpy(ptr, c->buf, arg); + return 1; + + case EVP_CTRL_GET_IV: + if (gctx->iv_gen != 1) + return 0; + if (gctx->ivlen != arg) + return 0; + memcpy(ptr, gctx->iv, arg); return 1; case EVP_CTRL_GCM_SET_IV_FIXED: @@ -1347,8 +2907,7 @@ static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) return 0; if (arg) memcpy(gctx->iv, ptr, arg); - if (EVP_CIPHER_CTX_encrypting(c) - && RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0) + if (c->encrypt && RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0) return 0; gctx->iv_gen = 1; return 1; @@ -1369,8 +2928,7 @@ static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) return 1; case EVP_CTRL_GCM_SET_IV_INV: - if (gctx->iv_gen == 0 || gctx->key_set == 0 - || EVP_CIPHER_CTX_encrypting(c)) + if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt) return 0; memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg); CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); @@ -1381,24 +2939,23 @@ static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) /* Save the AAD for later use */ if (arg != EVP_AEAD_TLS1_AAD_LEN) return 0; - memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); + memcpy(c->buf, ptr, arg); gctx->tls_aad_len = arg; + gctx->tls_enc_records = 0; { - unsigned int len = - EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8 - | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1]; + unsigned int len = c->buf[arg - 2] << 8 | c->buf[arg - 1]; /* Correct length for explicit IV */ if (len < EVP_GCM_TLS_EXPLICIT_IV_LEN) return 0; len -= EVP_GCM_TLS_EXPLICIT_IV_LEN; /* If decrypting correct for tag too */ - if (!EVP_CIPHER_CTX_encrypting(c)) { + if (!c->encrypt) { if (len < EVP_GCM_TLS_TAG_LEN) return 0; len -= EVP_GCM_TLS_TAG_LEN; } - EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8; - EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff; + c->buf[arg - 2] = len >> 8; + c->buf[arg - 1] = len & 0xff; } /* Extra padding: tag appended to record */ return EVP_GCM_TLS_TAG_LEN; @@ -1412,12 +2969,13 @@ static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) return 0; gctx_out->gcm.key = &gctx_out->ks; } - if (gctx->iv == EVP_CIPHER_CTX_iv_noconst(c)) - gctx_out->iv = EVP_CIPHER_CTX_iv_noconst(out); + if (gctx->iv == c->iv) + gctx_out->iv = out->iv; else { - gctx_out->iv = OPENSSL_malloc(gctx->ivlen); - if (gctx_out->iv == NULL) + if ((gctx_out->iv = OPENSSL_malloc(gctx->ivlen)) == NULL) { + EVPerr(EVP_F_AES_GCM_CTRL, ERR_R_MALLOC_FAILURE); return 0; + } memcpy(gctx_out->iv, gctx->iv, gctx->ivlen); } return 1; @@ -1439,8 +2997,7 @@ static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, do { #ifdef HWAES_CAPABLE if (HWAES_CAPABLE) { - HWAES_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, - &gctx->ks.ks); + HWAES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks.ks); CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f) HWAES_encrypt); # ifdef HWAES_ctr32_encrypt_blocks @@ -1453,8 +3010,7 @@ static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, #endif #ifdef BSAES_CAPABLE if (BSAES_CAPABLE) { - AES_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, - &gctx->ks.ks); + AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks.ks); CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f) AES_encrypt); gctx->ctr = (ctr128_f) bsaes_ctr32_encrypt_blocks; @@ -1463,8 +3019,7 @@ static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, #endif #ifdef VPAES_CAPABLE if (VPAES_CAPABLE) { - vpaes_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, - &gctx->ks.ks); + vpaes_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks.ks); CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f) vpaes_encrypt); gctx->ctr = NULL; @@ -1473,8 +3028,7 @@ static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, #endif (void)0; /* terminate potentially open 'else' */ - AES_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, - &gctx->ks.ks); + AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks.ks); CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f) AES_encrypt); #ifdef AES_CTR_ASM @@ -1522,23 +3076,34 @@ static int aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, if (out != in || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN)) return -1; + + /* + * Check for too many keys as per FIPS 140-2 IG A.5 "Key/IV Pair Uniqueness + * Requirements from SP 800-38D". The requirements is for one party to the + * communication to fail after 2^64 - 1 keys. We do this on the encrypting + * side only. + */ + if (ctx->encrypt && ++gctx->tls_enc_records == 0) { + EVPerr(EVP_F_AES_GCM_TLS_CIPHER, EVP_R_TOO_MANY_RECORDS); + goto err; + } + /* * Set IV from start of buffer or generate IV and write to start of * buffer. */ - if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CIPHER_CTX_encrypting(ctx) ? - EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV, + if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ? EVP_CTRL_GCM_IV_GEN + : EVP_CTRL_GCM_SET_IV_INV, EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0) goto err; /* Use saved AAD */ - if (CRYPTO_gcm128_aad(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), - gctx->tls_aad_len)) + if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len)) goto err; /* Fix buffer and length to point to payload */ in += EVP_GCM_TLS_EXPLICIT_IV_LEN; out += EVP_GCM_TLS_EXPLICIT_IV_LEN; len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; - if (EVP_CIPHER_CTX_encrypting(ctx)) { + if (ctx->encrypt) { /* Encrypt payload */ if (gctx->ctr) { size_t bulk = 0; @@ -1617,11 +3182,9 @@ static int aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, goto err; } /* Retrieve tag */ - CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), - EVP_GCM_TLS_TAG_LEN); + CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, EVP_GCM_TLS_TAG_LEN); /* If tag mismatch wipe buffer */ - if (CRYPTO_memcmp(EVP_CIPHER_CTX_buf_noconst(ctx), in + len, - EVP_GCM_TLS_TAG_LEN)) { + if (CRYPTO_memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN)) { OPENSSL_cleanse(out, len); goto err; } @@ -1651,7 +3214,7 @@ static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, if (out == NULL) { if (CRYPTO_gcm128_aad(&gctx->gcm, in, len)) return -1; - } else if (EVP_CIPHER_CTX_encrypting(ctx)) { + } else if (ctx->encrypt) { if (gctx->ctr) { size_t bulk = 0; #if defined(AES_GCM_ASM) @@ -1742,17 +3305,15 @@ static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, } return len; } else { - if (!EVP_CIPHER_CTX_encrypting(ctx)) { + if (!ctx->encrypt) { if (gctx->taglen < 0) return -1; - if (CRYPTO_gcm128_finish(&gctx->gcm, - EVP_CIPHER_CTX_buf_noconst(ctx), - gctx->taglen) != 0) + if (CRYPTO_gcm128_finish(&gctx->gcm, ctx->buf, gctx->taglen) != 0) return -1; gctx->iv_set = 0; return 0; } - CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), 16); + CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16); gctx->taglen = 16; /* Don't reuse the IV */ gctx->iv_set = 0; @@ -1902,10 +3463,30 @@ static int aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t len) { EVP_AES_XTS_CTX *xctx = EVP_C_DATA(EVP_AES_XTS_CTX,ctx); - if (!xctx->xts.key1 || !xctx->xts.key2) + + if (xctx->xts.key1 == NULL + || xctx->xts.key2 == NULL + || out == NULL + || in == NULL + || len < AES_BLOCK_SIZE) return 0; - if (!out || !in || len < AES_BLOCK_SIZE) + + /* + * Verify that the two keys are different. + * + * This addresses the vulnerability described in Rogaway's September 2004 + * paper (http://web.cs.ucdavis.edu/~rogaway/papers/offsets.pdf): + * "Efficient Instantiations of Tweakable Blockciphers and Refinements + * to Modes OCB and PMAC". + * + * FIPS 140-2 IG A.9 XTS-AES Key Generation Requirements states that: + * "The check for Key_1 != Key_2 shall be done at any place BEFORE + * using the keys in the XTS-AES algorithm to process data with them." + */ + if (CRYPTO_memcmp(xctx->xts.key1, xctx->xts.key2, + EVP_CIPHER_CTX_key_length(ctx) / 2) == 0) return 0; + if (xctx->stream) (*xctx->stream) (in, out, len, xctx->xts.key1, xctx->xts.key2, @@ -1976,6 +3557,7 @@ static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) case EVP_CTRL_AEAD_SET_IVLEN: arg = 15 - arg; + /* fall thru */ case EVP_CTRL_CCM_SET_L: if (arg < 2 || arg > 8) return 0; @@ -2127,6 +3709,10 @@ static int aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, if (cctx->tls_aad_len >= 0) return aes_ccm_tls_cipher(ctx, out, in, len); + /* EVP_*Final() doesn't return any data */ + if (in == NULL && out != NULL) + return 0; + if (!cctx->iv_set) return -1; @@ -2146,9 +3732,6 @@ static int aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, CRYPTO_ccm128_aad(ccm, in, len); return len; } - /* EVP_*Final() doesn't return any data */ - if (!in) - return 0; /* If not set length yet do it */ if (!cctx->len_set) { if (CRYPTO_ccm128_setiv(ccm, EVP_CIPHER_CTX_iv_noconst(ctx), @@ -2698,3 +4281,114 @@ BLOCK_CIPHER_custom(NID_aes, 192, 16, 12, ocb, OCB, BLOCK_CIPHER_custom(NID_aes, 256, 16, 12, ocb, OCB, EVP_CIPH_FLAG_AEAD_CIPHER | CUSTOM_FLAGS) #endif /* OPENSSL_NO_OCB */ + +/* AES-SIV mode */ +#ifndef OPENSSL_NO_SIV + +typedef SIV128_CONTEXT EVP_AES_SIV_CTX; + +#define aesni_siv_init_key aes_siv_init_key +static int aes_siv_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) +{ + const EVP_CIPHER *ctr; + const EVP_CIPHER *cbc; + SIV128_CONTEXT *sctx = EVP_C_DATA(SIV128_CONTEXT, ctx); + int klen = EVP_CIPHER_CTX_key_length(ctx) / 2; + + if (key == NULL) + return 1; + + switch (klen) { + case 16: + cbc = EVP_aes_128_cbc(); + ctr = EVP_aes_128_ctr(); + break; + case 24: + cbc = EVP_aes_192_cbc(); + ctr = EVP_aes_192_ctr(); + break; + case 32: + cbc = EVP_aes_256_cbc(); + ctr = EVP_aes_256_ctr(); + break; + default: + return 0; + } + + /* klen is the length of the underlying cipher, not the input key, + which should be twice as long */ + return CRYPTO_siv128_init(sctx, key, klen, cbc, ctr); +} + +#define aesni_siv_cipher aes_siv_cipher +static int aes_siv_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len) +{ + SIV128_CONTEXT *sctx = EVP_C_DATA(SIV128_CONTEXT, ctx); + + /* EncryptFinal or DecryptFinal */ + if (in == NULL) + return CRYPTO_siv128_finish(sctx); + + /* Deal with associated data */ + if (out == NULL) + return CRYPTO_siv128_aad(sctx, in, len); + + if (EVP_CIPHER_CTX_encrypting(ctx)) + return CRYPTO_siv128_encrypt(sctx, in, out, len); + + return CRYPTO_siv128_decrypt(sctx, in, out, len); +} + +#define aesni_siv_cleanup aes_siv_cleanup +static int aes_siv_cleanup(EVP_CIPHER_CTX *c) +{ + SIV128_CONTEXT *sctx = EVP_C_DATA(SIV128_CONTEXT, c); + + return CRYPTO_siv128_cleanup(sctx); +} + + +#define aesni_siv_ctrl aes_siv_ctrl +static int aes_siv_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) +{ + SIV128_CONTEXT *sctx = EVP_C_DATA(SIV128_CONTEXT, c); + SIV128_CONTEXT *sctx_out; + + switch (type) { + case EVP_CTRL_INIT: + return CRYPTO_siv128_cleanup(sctx); + + case EVP_CTRL_SET_SPEED: + return CRYPTO_siv128_speed(sctx, arg); + + case EVP_CTRL_AEAD_SET_TAG: + if (!EVP_CIPHER_CTX_encrypting(c)) + return CRYPTO_siv128_set_tag(sctx, ptr, arg); + return 1; + + case EVP_CTRL_AEAD_GET_TAG: + if (!EVP_CIPHER_CTX_encrypting(c)) + return 0; + return CRYPTO_siv128_get_tag(sctx, ptr, arg); + + case EVP_CTRL_COPY: + sctx_out = EVP_C_DATA(SIV128_CONTEXT, (EVP_CIPHER_CTX*)ptr); + return CRYPTO_siv128_copy_ctx(sctx_out, sctx); + + default: + return -1; + + } +} + +#define SIV_FLAGS (EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_FLAG_DEFAULT_ASN1 \ + | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \ + | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CUSTOM_COPY \ + | EVP_CIPH_CTRL_INIT) + +BLOCK_CIPHER_custom(NID_aes, 128, 1, 0, siv, SIV, SIV_FLAGS) +BLOCK_CIPHER_custom(NID_aes, 192, 1, 0, siv, SIV, SIV_FLAGS) +BLOCK_CIPHER_custom(NID_aes, 256, 1, 0, siv, SIV, SIV_FLAGS) +#endif