| /* |
| * Copyright 2017-2021 The OpenSSL Project Authors. All Rights Reserved. |
| * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
| * |
| * 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 |
| */ |
| |
| #include "internal/deprecated.h" |
| |
| #include "internal/cryptlib.h" |
| #ifndef OPENSSL_NO_ARIA |
| # include <openssl/evp.h> |
| # include <openssl/modes.h> |
| # include <openssl/rand.h> |
| # include "crypto/aria.h" |
| # include "crypto/evp.h" |
| # include "crypto/modes.h" |
| # include "evp_local.h" |
| |
| /* ARIA subkey Structure */ |
| typedef struct { |
| ARIA_KEY ks; |
| } EVP_ARIA_KEY; |
| |
| /* ARIA GCM context */ |
| typedef struct { |
| union { |
| OSSL_UNION_ALIGN; |
| ARIA_KEY ks; |
| } ks; /* ARIA subkey to use */ |
| int key_set; /* Set if key initialised */ |
| int iv_set; /* Set if an iv is set */ |
| GCM128_CONTEXT gcm; |
| unsigned char *iv; /* Temporary IV store */ |
| int ivlen; /* IV length */ |
| int taglen; |
| int iv_gen; /* It is OK to generate IVs */ |
| int tls_aad_len; /* TLS AAD length */ |
| } EVP_ARIA_GCM_CTX; |
| |
| /* ARIA CCM context */ |
| typedef struct { |
| union { |
| OSSL_UNION_ALIGN; |
| ARIA_KEY ks; |
| } ks; /* ARIA key schedule to use */ |
| int key_set; /* Set if key initialised */ |
| int iv_set; /* Set if an iv is set */ |
| int tag_set; /* Set if tag is valid */ |
| int len_set; /* Set if message length set */ |
| int L, M; /* L and M parameters from RFC3610 */ |
| int tls_aad_len; /* TLS AAD length */ |
| CCM128_CONTEXT ccm; |
| ccm128_f str; |
| } EVP_ARIA_CCM_CTX; |
| |
| /* The subkey for ARIA is generated. */ |
| static int aria_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| const unsigned char *iv, int enc) |
| { |
| int ret; |
| int mode = EVP_CIPHER_CTX_get_mode(ctx); |
| |
| if (enc || (mode != EVP_CIPH_ECB_MODE && mode != EVP_CIPH_CBC_MODE)) |
| ret = ossl_aria_set_encrypt_key(key, |
| EVP_CIPHER_CTX_get_key_length(ctx) * 8, |
| EVP_CIPHER_CTX_get_cipher_data(ctx)); |
| else |
| ret = ossl_aria_set_decrypt_key(key, |
| EVP_CIPHER_CTX_get_key_length(ctx) * 8, |
| EVP_CIPHER_CTX_get_cipher_data(ctx)); |
| if (ret < 0) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_ARIA_KEY_SETUP_FAILED); |
| return 0; |
| } |
| return 1; |
| } |
| |
| static void aria_cbc_encrypt(const unsigned char *in, unsigned char *out, |
| size_t len, const ARIA_KEY *key, |
| unsigned char *ivec, const int enc) |
| { |
| |
| if (enc) |
| CRYPTO_cbc128_encrypt(in, out, len, key, ivec, |
| (block128_f) ossl_aria_encrypt); |
| else |
| CRYPTO_cbc128_decrypt(in, out, len, key, ivec, |
| (block128_f) ossl_aria_encrypt); |
| } |
| |
| static void aria_cfb128_encrypt(const unsigned char *in, unsigned char *out, |
| size_t length, const ARIA_KEY *key, |
| unsigned char *ivec, int *num, const int enc) |
| { |
| |
| CRYPTO_cfb128_encrypt(in, out, length, key, ivec, num, enc, |
| (block128_f) ossl_aria_encrypt); |
| } |
| |
| static void aria_cfb1_encrypt(const unsigned char *in, unsigned char *out, |
| size_t length, const ARIA_KEY *key, |
| unsigned char *ivec, int *num, const int enc) |
| { |
| CRYPTO_cfb128_1_encrypt(in, out, length, key, ivec, num, enc, |
| (block128_f) ossl_aria_encrypt); |
| } |
| |
| static void aria_cfb8_encrypt(const unsigned char *in, unsigned char *out, |
| size_t length, const ARIA_KEY *key, |
| unsigned char *ivec, int *num, const int enc) |
| { |
| CRYPTO_cfb128_8_encrypt(in, out, length, key, ivec, num, enc, |
| (block128_f) ossl_aria_encrypt); |
| } |
| |
| static void aria_ecb_encrypt(const unsigned char *in, unsigned char *out, |
| const ARIA_KEY *key, const int enc) |
| { |
| ossl_aria_encrypt(in, out, key); |
| } |
| |
| static void aria_ofb128_encrypt(const unsigned char *in, unsigned char *out, |
| size_t length, const ARIA_KEY *key, |
| unsigned char *ivec, int *num) |
| { |
| CRYPTO_ofb128_encrypt(in, out, length, key, ivec, num, |
| (block128_f) ossl_aria_encrypt); |
| } |
| |
| IMPLEMENT_BLOCK_CIPHER(aria_128, ks, aria, EVP_ARIA_KEY, |
| NID_aria_128, 16, 16, 16, 128, |
| 0, aria_init_key, NULL, |
| EVP_CIPHER_set_asn1_iv, |
| EVP_CIPHER_get_asn1_iv, |
| NULL) |
| IMPLEMENT_BLOCK_CIPHER(aria_192, ks, aria, EVP_ARIA_KEY, |
| NID_aria_192, 16, 24, 16, 128, |
| 0, aria_init_key, NULL, |
| EVP_CIPHER_set_asn1_iv, |
| EVP_CIPHER_get_asn1_iv, |
| NULL) |
| IMPLEMENT_BLOCK_CIPHER(aria_256, ks, aria, EVP_ARIA_KEY, |
| NID_aria_256, 16, 32, 16, 128, |
| 0, aria_init_key, NULL, |
| EVP_CIPHER_set_asn1_iv, |
| EVP_CIPHER_get_asn1_iv, |
| NULL) |
| |
| # define IMPLEMENT_ARIA_CFBR(ksize,cbits) \ |
| IMPLEMENT_CFBR(aria,aria,EVP_ARIA_KEY,ks,ksize,cbits,16,0) |
| IMPLEMENT_ARIA_CFBR(128,1) |
| IMPLEMENT_ARIA_CFBR(192,1) |
| IMPLEMENT_ARIA_CFBR(256,1) |
| IMPLEMENT_ARIA_CFBR(128,8) |
| IMPLEMENT_ARIA_CFBR(192,8) |
| IMPLEMENT_ARIA_CFBR(256,8) |
| |
| # define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ |
| static const EVP_CIPHER aria_##keylen##_##mode = { \ |
| nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \ |
| flags|EVP_CIPH_##MODE##_MODE, \ |
| EVP_ORIG_GLOBAL, \ |
| aria_init_key, \ |
| aria_##mode##_cipher, \ |
| NULL, \ |
| sizeof(EVP_ARIA_KEY), \ |
| NULL,NULL,NULL,NULL }; \ |
| const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \ |
| { return &aria_##keylen##_##mode; } |
| |
| static int aria_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| const unsigned char *in, size_t len) |
| { |
| int n = EVP_CIPHER_CTX_get_num(ctx); |
| unsigned int num; |
| EVP_ARIA_KEY *dat = EVP_C_DATA(EVP_ARIA_KEY, ctx); |
| |
| if (n < 0) |
| return 0; |
| num = (unsigned int)n; |
| |
| CRYPTO_ctr128_encrypt(in, out, len, &dat->ks, ctx->iv, |
| EVP_CIPHER_CTX_buf_noconst(ctx), &num, |
| (block128_f) ossl_aria_encrypt); |
| EVP_CIPHER_CTX_set_num(ctx, num); |
| return 1; |
| } |
| |
| BLOCK_CIPHER_generic(NID_aria, 128, 1, 16, ctr, ctr, CTR, 0) |
| BLOCK_CIPHER_generic(NID_aria, 192, 1, 16, ctr, ctr, CTR, 0) |
| BLOCK_CIPHER_generic(NID_aria, 256, 1, 16, ctr, ctr, CTR, 0) |
| |
| /* Authenticated cipher modes (GCM/CCM) */ |
| |
| /* 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 aria_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| const unsigned char *iv, int enc) |
| { |
| int ret; |
| EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx); |
| |
| if (!iv && !key) |
| return 1; |
| if (key) { |
| ret = ossl_aria_set_encrypt_key(key, |
| EVP_CIPHER_CTX_get_key_length(ctx) * 8, |
| &gctx->ks.ks); |
| CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, |
| (block128_f) ossl_aria_encrypt); |
| if (ret < 0) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_ARIA_KEY_SETUP_FAILED); |
| return 0; |
| } |
| |
| /* |
| * If we have an iv can set it directly, otherwise use saved IV. |
| */ |
| if (iv == NULL && gctx->iv_set) |
| iv = gctx->iv; |
| if (iv) { |
| CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); |
| gctx->iv_set = 1; |
| } |
| gctx->key_set = 1; |
| } else { |
| /* If key set use IV, otherwise copy */ |
| if (gctx->key_set) |
| CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); |
| else |
| memcpy(gctx->iv, iv, gctx->ivlen); |
| gctx->iv_set = 1; |
| gctx->iv_gen = 0; |
| } |
| return 1; |
| } |
| |
| static int aria_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
| { |
| EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, c); |
| |
| switch (type) { |
| case EVP_CTRL_INIT: |
| gctx->key_set = 0; |
| gctx->iv_set = 0; |
| gctx->ivlen = EVP_CIPHER_get_iv_length(c->cipher); |
| gctx->iv = c->iv; |
| gctx->taglen = -1; |
| gctx->iv_gen = 0; |
| gctx->tls_aad_len = -1; |
| return 1; |
| |
| case EVP_CTRL_GET_IVLEN: |
| *(int *)ptr = gctx->ivlen; |
| return 1; |
| |
| case EVP_CTRL_AEAD_SET_IVLEN: |
| if (arg <= 0) |
| return 0; |
| /* Allocate memory for IV if needed */ |
| if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) { |
| if (gctx->iv != c->iv) |
| OPENSSL_free(gctx->iv); |
| if ((gctx->iv = OPENSSL_malloc(arg)) == NULL) { |
| ERR_raise(ERR_LIB_EVP, 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_is_encrypting(c)) |
| return 0; |
| memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); |
| gctx->taglen = arg; |
| return 1; |
| |
| case EVP_CTRL_AEAD_GET_TAG: |
| if (arg <= 0 || arg > 16 || !EVP_CIPHER_CTX_is_encrypting(c) |
| || gctx->taglen < 0) |
| return 0; |
| memcpy(ptr, EVP_CIPHER_CTX_buf_noconst(c), 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); |
| if (EVP_CIPHER_CTX_is_encrypting(c) |
| && 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; |
| CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); |
| 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: |
| if (gctx->iv_gen == 0 || gctx->key_set == 0 |
| || EVP_CIPHER_CTX_is_encrypting(c)) |
| return 0; |
| memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg); |
| CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); |
| 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; |
| memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); |
| gctx->tls_aad_len = arg; |
| { |
| unsigned int len = |
| EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8 |
| | EVP_CIPHER_CTX_buf_noconst(c)[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_is_encrypting(c)) { |
| 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; |
| } |
| /* Extra padding: tag appended to record */ |
| return EVP_GCM_TLS_TAG_LEN; |
| |
| case EVP_CTRL_COPY: |
| { |
| EVP_CIPHER_CTX *out = ptr; |
| EVP_ARIA_GCM_CTX *gctx_out = EVP_C_DATA(EVP_ARIA_GCM_CTX, out); |
| if (gctx->gcm.key) { |
| if (gctx->gcm.key != &gctx->ks) |
| return 0; |
| gctx_out->gcm.key = &gctx_out->ks; |
| } |
| if (gctx->iv == c->iv) |
| gctx_out->iv = out->iv; |
| else { |
| if ((gctx_out->iv = OPENSSL_malloc(gctx->ivlen)) == NULL) { |
| ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| memcpy(gctx_out->iv, gctx->iv, gctx->ivlen); |
| } |
| return 1; |
| } |
| |
| default: |
| return -1; |
| |
| } |
| } |
| |
| static int aria_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| const unsigned char *in, size_t len) |
| { |
| EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx); |
| int rv = -1; |
| |
| /* Encrypt/decrypt must be performed in place */ |
| if (out != in |
| || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN)) |
| return -1; |
| /* |
| * Set IV from start of buffer or generate IV and write to start of |
| * buffer. |
| */ |
| if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CIPHER_CTX_is_encrypting(ctx) ? |
| 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)) |
| 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_is_encrypting(ctx)) { |
| /* Encrypt payload */ |
| if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) |
| goto err; |
| out += len; |
| /* Finally write tag */ |
| CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN); |
| rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; |
| } else { |
| /* Decrypt */ |
| if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) |
| goto err; |
| /* Retrieve tag */ |
| CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), |
| 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)) { |
| OPENSSL_cleanse(out, len); |
| goto err; |
| } |
| rv = len; |
| } |
| |
| err: |
| gctx->iv_set = 0; |
| gctx->tls_aad_len = -1; |
| return rv; |
| } |
| |
| static int aria_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| const unsigned char *in, size_t len) |
| { |
| EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx); |
| |
| /* If not set up, return error */ |
| if (!gctx->key_set) |
| return -1; |
| |
| if (gctx->tls_aad_len >= 0) |
| return aria_gcm_tls_cipher(ctx, out, in, len); |
| |
| if (!gctx->iv_set) |
| return -1; |
| if (in) { |
| if (out == NULL) { |
| if (CRYPTO_gcm128_aad(&gctx->gcm, in, len)) |
| return -1; |
| } else if (EVP_CIPHER_CTX_is_encrypting(ctx)) { |
| if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) |
| return -1; |
| } else { |
| if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) |
| return -1; |
| } |
| return len; |
| } |
| if (!EVP_CIPHER_CTX_is_encrypting(ctx)) { |
| if (gctx->taglen < 0) |
| return -1; |
| if (CRYPTO_gcm128_finish(&gctx->gcm, |
| EVP_CIPHER_CTX_buf_noconst(ctx), |
| gctx->taglen) != 0) |
| return -1; |
| gctx->iv_set = 0; |
| return 0; |
| } |
| CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), 16); |
| gctx->taglen = 16; |
| /* Don't reuse the IV */ |
| gctx->iv_set = 0; |
| return 0; |
| } |
| |
| static int aria_gcm_cleanup(EVP_CIPHER_CTX *ctx) |
| { |
| EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx); |
| |
| if (gctx->iv != ctx->iv) |
| OPENSSL_free(gctx->iv); |
| |
| return 1; |
| } |
| |
| static int aria_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| const unsigned char *iv, int enc) |
| { |
| int ret; |
| EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX, ctx); |
| |
| if (!iv && !key) |
| return 1; |
| |
| if (key) { |
| ret = ossl_aria_set_encrypt_key(key, |
| EVP_CIPHER_CTX_get_key_length(ctx) * 8, |
| &cctx->ks.ks); |
| CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, |
| &cctx->ks, (block128_f) ossl_aria_encrypt); |
| if (ret < 0) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_ARIA_KEY_SETUP_FAILED); |
| return 0; |
| } |
| cctx->str = NULL; |
| cctx->key_set = 1; |
| } |
| if (iv) { |
| memcpy(ctx->iv, iv, 15 - cctx->L); |
| cctx->iv_set = 1; |
| } |
| return 1; |
| } |
| |
| static int aria_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
| { |
| EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX, c); |
| |
| switch (type) { |
| case EVP_CTRL_INIT: |
| cctx->key_set = 0; |
| cctx->iv_set = 0; |
| cctx->L = 8; |
| cctx->M = 12; |
| cctx->tag_set = 0; |
| cctx->len_set = 0; |
| cctx->tls_aad_len = -1; |
| return 1; |
| |
| case EVP_CTRL_GET_IVLEN: |
| *(int *)ptr = 15 - cctx->L; |
| return 1; |
| |
| case EVP_CTRL_AEAD_TLS1_AAD: |
| /* Save the AAD for later use */ |
| if (arg != EVP_AEAD_TLS1_AAD_LEN) |
| return 0; |
| memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); |
| cctx->tls_aad_len = arg; |
| { |
| uint16_t len = |
| EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8 |
| | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1]; |
| /* Correct length for explicit IV */ |
| if (len < EVP_CCM_TLS_EXPLICIT_IV_LEN) |
| return 0; |
| len -= EVP_CCM_TLS_EXPLICIT_IV_LEN; |
| /* If decrypting correct for tag too */ |
| if (!EVP_CIPHER_CTX_is_encrypting(c)) { |
| if (len < cctx->M) |
| return 0; |
| len -= cctx->M; |
| } |
| EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8; |
| EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff; |
| } |
| /* Extra padding: tag appended to record */ |
| return cctx->M; |
| |
| case EVP_CTRL_CCM_SET_IV_FIXED: |
| /* Sanity check length */ |
| if (arg != EVP_CCM_TLS_FIXED_IV_LEN) |
| return 0; |
| /* Just copy to first part of IV */ |
| memcpy(c->iv, ptr, arg); |
| return 1; |
| |
| case EVP_CTRL_AEAD_SET_IVLEN: |
| arg = 15 - arg; |
| /* fall thru */ |
| case EVP_CTRL_CCM_SET_L: |
| if (arg < 2 || arg > 8) |
| return 0; |
| cctx->L = arg; |
| return 1; |
| case EVP_CTRL_AEAD_SET_TAG: |
| if ((arg & 1) || arg < 4 || arg > 16) |
| return 0; |
| if (EVP_CIPHER_CTX_is_encrypting(c) && ptr) |
| return 0; |
| if (ptr) { |
| cctx->tag_set = 1; |
| memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); |
| } |
| cctx->M = arg; |
| return 1; |
| |
| case EVP_CTRL_AEAD_GET_TAG: |
| if (!EVP_CIPHER_CTX_is_encrypting(c) || !cctx->tag_set) |
| return 0; |
| if (!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg)) |
| return 0; |
| cctx->tag_set = 0; |
| cctx->iv_set = 0; |
| cctx->len_set = 0; |
| return 1; |
| |
| case EVP_CTRL_COPY: |
| { |
| EVP_CIPHER_CTX *out = ptr; |
| EVP_ARIA_CCM_CTX *cctx_out = EVP_C_DATA(EVP_ARIA_CCM_CTX, out); |
| if (cctx->ccm.key) { |
| if (cctx->ccm.key != &cctx->ks) |
| return 0; |
| cctx_out->ccm.key = &cctx_out->ks; |
| } |
| return 1; |
| } |
| |
| default: |
| return -1; |
| } |
| } |
| |
| static int aria_ccm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| const unsigned char *in, size_t len) |
| { |
| EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX, ctx); |
| CCM128_CONTEXT *ccm = &cctx->ccm; |
| |
| /* Encrypt/decrypt must be performed in place */ |
| if (out != in || len < (EVP_CCM_TLS_EXPLICIT_IV_LEN + (size_t)cctx->M)) |
| return -1; |
| /* If encrypting set explicit IV from sequence number (start of AAD) */ |
| if (EVP_CIPHER_CTX_is_encrypting(ctx)) |
| memcpy(out, EVP_CIPHER_CTX_buf_noconst(ctx), |
| EVP_CCM_TLS_EXPLICIT_IV_LEN); |
| /* Get rest of IV from explicit IV */ |
| memcpy(ctx->iv + EVP_CCM_TLS_FIXED_IV_LEN, in, |
| EVP_CCM_TLS_EXPLICIT_IV_LEN); |
| /* Correct length value */ |
| len -= EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M; |
| if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, |
| len)) |
| return -1; |
| /* Use saved AAD */ |
| CRYPTO_ccm128_aad(ccm, EVP_CIPHER_CTX_buf_noconst(ctx), |
| cctx->tls_aad_len); |
| /* Fix buffer to point to payload */ |
| in += EVP_CCM_TLS_EXPLICIT_IV_LEN; |
| out += EVP_CCM_TLS_EXPLICIT_IV_LEN; |
| if (EVP_CIPHER_CTX_is_encrypting(ctx)) { |
| if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str) |
| : CRYPTO_ccm128_encrypt(ccm, in, out, len)) |
| return -1; |
| if (!CRYPTO_ccm128_tag(ccm, out + len, cctx->M)) |
| return -1; |
| return len + EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M; |
| } else { |
| if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, cctx->str) |
| : !CRYPTO_ccm128_decrypt(ccm, in, out, len)) { |
| unsigned char tag[16]; |
| if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) { |
| if (!CRYPTO_memcmp(tag, in + len, cctx->M)) |
| return len; |
| } |
| } |
| OPENSSL_cleanse(out, len); |
| return -1; |
| } |
| } |
| |
| static int aria_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| const unsigned char *in, size_t len) |
| { |
| EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX, ctx); |
| CCM128_CONTEXT *ccm = &cctx->ccm; |
| |
| /* If not set up, return error */ |
| if (!cctx->key_set) |
| return -1; |
| |
| if (cctx->tls_aad_len >= 0) |
| return aria_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; |
| |
| if (!out) { |
| if (!in) { |
| if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len)) |
| return -1; |
| cctx->len_set = 1; |
| return len; |
| } |
| /* If have AAD need message length */ |
| if (!cctx->len_set && len) |
| return -1; |
| CRYPTO_ccm128_aad(ccm, in, len); |
| return len; |
| } |
| |
| /* The tag must be set before actually decrypting data */ |
| if (!EVP_CIPHER_CTX_is_encrypting(ctx) && !cctx->tag_set) |
| return -1; |
| |
| /* If not set length yet do it */ |
| if (!cctx->len_set) { |
| if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len)) |
| return -1; |
| cctx->len_set = 1; |
| } |
| if (EVP_CIPHER_CTX_is_encrypting(ctx)) { |
| if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str) |
| : CRYPTO_ccm128_encrypt(ccm, in, out, len)) |
| return -1; |
| cctx->tag_set = 1; |
| return len; |
| } else { |
| int rv = -1; |
| if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, |
| cctx->str) : |
| !CRYPTO_ccm128_decrypt(ccm, in, out, len)) { |
| unsigned char tag[16]; |
| if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) { |
| if (!CRYPTO_memcmp(tag, EVP_CIPHER_CTX_buf_noconst(ctx), |
| cctx->M)) |
| rv = len; |
| } |
| } |
| if (rv == -1) |
| OPENSSL_cleanse(out, len); |
| cctx->iv_set = 0; |
| cctx->tag_set = 0; |
| cctx->len_set = 0; |
| return rv; |
| } |
| } |
| |
| #define aria_ccm_cleanup NULL |
| |
| #define ARIA_AUTH_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \ |
| | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \ |
| | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \ |
| | EVP_CIPH_CUSTOM_COPY | EVP_CIPH_FLAG_AEAD_CIPHER \ |
| | EVP_CIPH_CUSTOM_IV_LENGTH) |
| |
| #define BLOCK_CIPHER_aead(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ |
| static const EVP_CIPHER aria_##keylen##_##mode = { \ |
| nid##_##keylen##_##nmode, \ |
| blocksize, keylen/8, ivlen, \ |
| ARIA_AUTH_FLAGS|EVP_CIPH_##MODE##_MODE, \ |
| EVP_ORIG_GLOBAL, \ |
| aria_##mode##_init_key, \ |
| aria_##mode##_cipher, \ |
| aria_##mode##_cleanup, \ |
| sizeof(EVP_ARIA_##MODE##_CTX), \ |
| NULL,NULL,aria_##mode##_ctrl,NULL }; \ |
| const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \ |
| { return (EVP_CIPHER*)&aria_##keylen##_##mode; } |
| |
| BLOCK_CIPHER_aead(NID_aria, 128, 1, 12, gcm, gcm, GCM, 0) |
| BLOCK_CIPHER_aead(NID_aria, 192, 1, 12, gcm, gcm, GCM, 0) |
| BLOCK_CIPHER_aead(NID_aria, 256, 1, 12, gcm, gcm, GCM, 0) |
| |
| BLOCK_CIPHER_aead(NID_aria, 128, 1, 12, ccm, ccm, CCM, 0) |
| BLOCK_CIPHER_aead(NID_aria, 192, 1, 12, ccm, ccm, CCM, 0) |
| BLOCK_CIPHER_aead(NID_aria, 256, 1, 12, ccm, ccm, CCM, 0) |
| |
| #endif |
