diff options
| -rw-r--r-- | crypto/cipher-builtin.c.inc | 519 |
1 files changed, 210 insertions, 309 deletions
diff --git a/crypto/cipher-builtin.c.inc b/crypto/cipher-builtin.c.inc index b1fe3b08c3..7597cf4a10 100644 --- a/crypto/cipher-builtin.c.inc +++ b/crypto/cipher-builtin.c.inc @@ -22,56 +22,45 @@ #include "crypto/desrfb.h" #include "crypto/xts.h" -static const struct QCryptoCipherDriver qcrypto_cipher_lib_driver; - typedef struct QCryptoCipherBuiltinAESContext QCryptoCipherBuiltinAESContext; struct QCryptoCipherBuiltinAESContext { AES_KEY enc; AES_KEY dec; }; + typedef struct QCryptoCipherBuiltinAES QCryptoCipherBuiltinAES; struct QCryptoCipherBuiltinAES { + QCryptoCipher base; QCryptoCipherBuiltinAESContext key; QCryptoCipherBuiltinAESContext key_tweak; uint8_t iv[AES_BLOCK_SIZE]; }; -typedef struct QCryptoCipherBuiltinDESRFB QCryptoCipherBuiltinDESRFB; -struct QCryptoCipherBuiltinDESRFB { - uint8_t *key; - size_t nkey; -}; -typedef struct QCryptoCipherBuiltin QCryptoCipherBuiltin; -struct QCryptoCipherBuiltin { - QCryptoCipher base; - - union { - QCryptoCipherBuiltinAES aes; - QCryptoCipherBuiltinDESRFB desrfb; - } state; - size_t blocksize; - void (*free)(QCryptoCipher *cipher); - int (*setiv)(QCryptoCipher *cipher, - const uint8_t *iv, size_t niv, - Error **errp); - int (*encrypt)(QCryptoCipher *cipher, - const void *in, - void *out, - size_t len, - Error **errp); - int (*decrypt)(QCryptoCipher *cipher, - const void *in, - void *out, - size_t len, - Error **errp); -}; +static inline bool qcrypto_length_check(size_t len, size_t blocksize, + Error **errp) +{ + if (unlikely(len & (blocksize - 1))) { + error_setg(errp, "Length %zu must be a multiple of block size %zu", + len, blocksize); + return false; + } + return true; +} -static void qcrypto_cipher_free_aes(QCryptoCipher *cipher) +static void qcrypto_cipher_ctx_free(QCryptoCipher *cipher) { g_free(cipher); } +static int qcrypto_cipher_no_setiv(QCryptoCipher *cipher, + const uint8_t *iv, size_t niv, + Error **errp) +{ + error_setg(errp, "Setting IV is not supported"); + return -1; +} + static void do_aes_encrypt_ecb(const void *vctx, size_t len, uint8_t *out, @@ -149,185 +138,154 @@ static void do_aes_decrypt_cbc(const AES_KEY *key, } } -static int qcrypto_cipher_encrypt_aes(QCryptoCipher *cipher, - const void *in, - void *out, - size_t len, - Error **errp) +static int qcrypto_cipher_aes_encrypt_ecb(QCryptoCipher *cipher, + const void *in, void *out, + size_t len, Error **errp) { - QCryptoCipherBuiltin *ctxt - = container_of(cipher, QCryptoCipherBuiltin, base); + QCryptoCipherBuiltinAES *ctx + = container_of(cipher, QCryptoCipherBuiltinAES, base); - switch (cipher->mode) { - case QCRYPTO_CIPHER_MODE_ECB: - do_aes_encrypt_ecb(&ctxt->state.aes.key, len, out, in); - break; - case QCRYPTO_CIPHER_MODE_CBC: - do_aes_encrypt_cbc(&ctxt->state.aes.key.enc, len, out, in, - ctxt->state.aes.iv); - break; - case QCRYPTO_CIPHER_MODE_XTS: - xts_encrypt(&ctxt->state.aes.key, - &ctxt->state.aes.key_tweak, - do_aes_encrypt_ecb, - do_aes_decrypt_ecb, - ctxt->state.aes.iv, - len, out, in); - break; - default: - g_assert_not_reached(); + if (!qcrypto_length_check(len, AES_BLOCK_SIZE, errp)) { + return -1; } - + do_aes_encrypt_ecb(&ctx->key, len, out, in); return 0; } - -static int qcrypto_cipher_decrypt_aes(QCryptoCipher *cipher, - const void *in, - void *out, - size_t len, - Error **errp) +static int qcrypto_cipher_aes_decrypt_ecb(QCryptoCipher *cipher, + const void *in, void *out, + size_t len, Error **errp) { - QCryptoCipherBuiltin *ctxt - = container_of(cipher, QCryptoCipherBuiltin, base); + QCryptoCipherBuiltinAES *ctx + = container_of(cipher, QCryptoCipherBuiltinAES, base); - switch (cipher->mode) { - case QCRYPTO_CIPHER_MODE_ECB: - do_aes_decrypt_ecb(&ctxt->state.aes.key, len, out, in); - break; - case QCRYPTO_CIPHER_MODE_CBC: - do_aes_decrypt_cbc(&ctxt->state.aes.key.dec, len, out, in, - ctxt->state.aes.iv); - break; - case QCRYPTO_CIPHER_MODE_XTS: - xts_decrypt(&ctxt->state.aes.key, - &ctxt->state.aes.key_tweak, - do_aes_encrypt_ecb, - do_aes_decrypt_ecb, - ctxt->state.aes.iv, - len, out, in); - break; - default: - g_assert_not_reached(); + if (!qcrypto_length_check(len, AES_BLOCK_SIZE, errp)) { + return -1; } - + do_aes_decrypt_ecb(&ctx->key, len, out, in); return 0; } -static int qcrypto_cipher_setiv_aes(QCryptoCipher *cipher, - const uint8_t *iv, size_t niv, - Error **errp) +static int qcrypto_cipher_aes_encrypt_cbc(QCryptoCipher *cipher, + const void *in, void *out, + size_t len, Error **errp) { - QCryptoCipherBuiltin *ctxt - = container_of(cipher, QCryptoCipherBuiltin, base); + QCryptoCipherBuiltinAES *ctx + = container_of(cipher, QCryptoCipherBuiltinAES, base); - if (niv != AES_BLOCK_SIZE) { - error_setg(errp, "IV must be %d bytes not %zu", - AES_BLOCK_SIZE, niv); + if (!qcrypto_length_check(len, AES_BLOCK_SIZE, errp)) { return -1; } - - memcpy(ctxt->state.aes.iv, iv, AES_BLOCK_SIZE); - + do_aes_encrypt_cbc(&ctx->key.enc, len, out, in, ctx->iv); return 0; } +static int qcrypto_cipher_aes_decrypt_cbc(QCryptoCipher *cipher, + const void *in, void *out, + size_t len, Error **errp) +{ + QCryptoCipherBuiltinAES *ctx + = container_of(cipher, QCryptoCipherBuiltinAES, base); + if (!qcrypto_length_check(len, AES_BLOCK_SIZE, errp)) { + return -1; + } + do_aes_decrypt_cbc(&ctx->key.dec, len, out, in, ctx->iv); + return 0; +} - -static QCryptoCipher * -qcrypto_cipher_init_aes(QCryptoCipherMode mode, - const uint8_t *key, size_t nkey, - Error **errp) +static int qcrypto_cipher_aes_encrypt_xts(QCryptoCipher *cipher, + const void *in, void *out, + size_t len, Error **errp) { - QCryptoCipherBuiltin *ctxt; + QCryptoCipherBuiltinAES *ctx + = container_of(cipher, QCryptoCipherBuiltinAES, base); - if (mode != QCRYPTO_CIPHER_MODE_CBC && - mode != QCRYPTO_CIPHER_MODE_ECB && - mode != QCRYPTO_CIPHER_MODE_XTS) { - error_setg(errp, "Unsupported cipher mode %s", - QCryptoCipherMode_str(mode)); - return NULL; + if (!qcrypto_length_check(len, AES_BLOCK_SIZE, errp)) { + return -1; } + xts_encrypt(&ctx->key, &ctx->key_tweak, + do_aes_encrypt_ecb, do_aes_decrypt_ecb, + ctx->iv, len, out, in); + return 0; +} - ctxt = g_new0(QCryptoCipherBuiltin, 1); +static int qcrypto_cipher_aes_decrypt_xts(QCryptoCipher *cipher, + const void *in, void *out, + size_t len, Error **errp) +{ + QCryptoCipherBuiltinAES *ctx + = container_of(cipher, QCryptoCipherBuiltinAES, base); - if (mode == QCRYPTO_CIPHER_MODE_XTS) { - if (AES_set_encrypt_key(key, nkey * 4, &ctxt->state.aes.key.enc) != 0) { - error_setg(errp, "Failed to set encryption key"); - goto error; - } + if (!qcrypto_length_check(len, AES_BLOCK_SIZE, errp)) { + return -1; + } + xts_decrypt(&ctx->key, &ctx->key_tweak, + do_aes_encrypt_ecb, do_aes_decrypt_ecb, + ctx->iv, len, out, in); + return 0; +} - if (AES_set_decrypt_key(key, nkey * 4, &ctxt->state.aes.key.dec) != 0) { - error_setg(errp, "Failed to set decryption key"); - goto error; - } - if (AES_set_encrypt_key(key + (nkey / 2), nkey * 4, - &ctxt->state.aes.key_tweak.enc) != 0) { - error_setg(errp, "Failed to set encryption key"); - goto error; - } - - if (AES_set_decrypt_key(key + (nkey / 2), nkey * 4, - &ctxt->state.aes.key_tweak.dec) != 0) { - error_setg(errp, "Failed to set decryption key"); - goto error; - } - } else { - if (AES_set_encrypt_key(key, nkey * 8, &ctxt->state.aes.key.enc) != 0) { - error_setg(errp, "Failed to set encryption key"); - goto error; - } +static int qcrypto_cipher_aes_setiv(QCryptoCipher *cipher, const uint8_t *iv, + size_t niv, Error **errp) +{ + QCryptoCipherBuiltinAES *ctx + = container_of(cipher, QCryptoCipherBuiltinAES, base); - if (AES_set_decrypt_key(key, nkey * 8, &ctxt->state.aes.key.dec) != 0) { - error_setg(errp, "Failed to set decryption key"); - goto error; - } + if (niv != AES_BLOCK_SIZE) { + error_setg(errp, "IV must be %d bytes not %zu", + AES_BLOCK_SIZE, niv); + return -1; } - ctxt->blocksize = AES_BLOCK_SIZE; - ctxt->free = qcrypto_cipher_free_aes; - ctxt->setiv = qcrypto_cipher_setiv_aes; - ctxt->encrypt = qcrypto_cipher_encrypt_aes; - ctxt->decrypt = qcrypto_cipher_decrypt_aes; + memcpy(ctx->iv, iv, AES_BLOCK_SIZE); + return 0; +} - ctxt->base.driver = &qcrypto_cipher_lib_driver; - return &ctxt->base; +static const struct QCryptoCipherDriver qcrypto_cipher_aes_driver_ecb = { + .cipher_encrypt = qcrypto_cipher_aes_encrypt_ecb, + .cipher_decrypt = qcrypto_cipher_aes_decrypt_ecb, + .cipher_setiv = qcrypto_cipher_no_setiv, + .cipher_free = qcrypto_cipher_ctx_free, +}; - error: - g_free(ctxt); - return NULL; -} +static const struct QCryptoCipherDriver qcrypto_cipher_aes_driver_cbc = { + .cipher_encrypt = qcrypto_cipher_aes_encrypt_cbc, + .cipher_decrypt = qcrypto_cipher_aes_decrypt_cbc, + .cipher_setiv = qcrypto_cipher_aes_setiv, + .cipher_free = qcrypto_cipher_ctx_free, +}; +static const struct QCryptoCipherDriver qcrypto_cipher_aes_driver_xts = { + .cipher_encrypt = qcrypto_cipher_aes_encrypt_xts, + .cipher_decrypt = qcrypto_cipher_aes_decrypt_xts, + .cipher_setiv = qcrypto_cipher_aes_setiv, + .cipher_free = qcrypto_cipher_ctx_free, +}; -static void qcrypto_cipher_free_des_rfb(QCryptoCipher *cipher) -{ - QCryptoCipherBuiltin *ctxt - = container_of(cipher, QCryptoCipherBuiltin, base); - g_free(ctxt->state.desrfb.key); - g_free(ctxt); -} +typedef struct QCryptoCipherBuiltinDESRFB QCryptoCipherBuiltinDESRFB; +struct QCryptoCipherBuiltinDESRFB { + QCryptoCipher base; + /* C.f. alg_key_len[QCRYPTO_CIPHER_ALG_DES_RFB] */ + uint8_t key[8]; +}; static int qcrypto_cipher_encrypt_des_rfb(QCryptoCipher *cipher, - const void *in, - void *out, - size_t len, - Error **errp) + const void *in, void *out, + size_t len, Error **errp) { - QCryptoCipherBuiltin *ctxt - = container_of(cipher, QCryptoCipherBuiltin, base); + QCryptoCipherBuiltinDESRFB *ctx + = container_of(cipher, QCryptoCipherBuiltinDESRFB, base); size_t i; - if (len % 8) { - error_setg(errp, "Buffer size must be multiple of 8 not %zu", - len); + if (!qcrypto_length_check(len, 8, errp)) { return -1; } - deskey(ctxt->state.desrfb.key, EN0); + deskey(ctx->key, EN0); for (i = 0; i < len; i += 8) { des((void *)in + i, out + i); @@ -336,24 +294,19 @@ static int qcrypto_cipher_encrypt_des_rfb(QCryptoCipher *cipher, return 0; } - static int qcrypto_cipher_decrypt_des_rfb(QCryptoCipher *cipher, - const void *in, - void *out, - size_t len, - Error **errp) + const void *in, void *out, + size_t len, Error **errp) { - QCryptoCipherBuiltin *ctxt - = container_of(cipher, QCryptoCipherBuiltin, base); + QCryptoCipherBuiltinDESRFB *ctx + = container_of(cipher, QCryptoCipherBuiltinDESRFB, base); size_t i; - if (len % 8) { - error_setg(errp, "Buffer size must be multiple of 8 not %zu", - len); + if (!qcrypto_length_check(len, 8, errp)) { return -1; } - deskey(ctxt->state.desrfb.key, DE1); + deskey(ctx->key, DE1); for (i = 0; i < len; i += 8) { des((void *)in + i, out + i); @@ -362,173 +315,121 @@ static int qcrypto_cipher_decrypt_des_rfb(QCryptoCipher *cipher, return 0; } - -static int qcrypto_cipher_setiv_des_rfb(QCryptoCipher *cipher, - const uint8_t *iv, size_t niv, - Error **errp) -{ - error_setg(errp, "Setting IV is not supported"); - return -1; -} - - -static QCryptoCipher * -qcrypto_cipher_init_des_rfb(QCryptoCipherMode mode, - const uint8_t *key, size_t nkey, - Error **errp) -{ - QCryptoCipherBuiltin *ctxt; - - if (mode != QCRYPTO_CIPHER_MODE_ECB) { - error_setg(errp, "Unsupported cipher mode %s", - QCryptoCipherMode_str(mode)); - return NULL; - } - - ctxt = g_new0(QCryptoCipherBuiltin, 1); - - ctxt->state.desrfb.key = g_new0(uint8_t, nkey); - memcpy(ctxt->state.desrfb.key, key, nkey); - ctxt->state.desrfb.nkey = nkey; - - ctxt->blocksize = 8; - ctxt->free = qcrypto_cipher_free_des_rfb; - ctxt->setiv = qcrypto_cipher_setiv_des_rfb; - ctxt->encrypt = qcrypto_cipher_encrypt_des_rfb; - ctxt->decrypt = qcrypto_cipher_decrypt_des_rfb; - - ctxt->base.driver = &qcrypto_cipher_lib_driver; - return &ctxt->base; -} - +static const struct QCryptoCipherDriver qcrypto_cipher_des_rfb_driver = { + .cipher_encrypt = qcrypto_cipher_encrypt_des_rfb, + .cipher_decrypt = qcrypto_cipher_decrypt_des_rfb, + .cipher_setiv = qcrypto_cipher_no_setiv, + .cipher_free = qcrypto_cipher_ctx_free, +}; bool qcrypto_cipher_supports(QCryptoCipherAlgorithm alg, QCryptoCipherMode mode) { switch (alg) { case QCRYPTO_CIPHER_ALG_DES_RFB: + return mode == QCRYPTO_CIPHER_MODE_ECB; case QCRYPTO_CIPHER_ALG_AES_128: case QCRYPTO_CIPHER_ALG_AES_192: case QCRYPTO_CIPHER_ALG_AES_256: + switch (mode) { + case QCRYPTO_CIPHER_MODE_ECB: + case QCRYPTO_CIPHER_MODE_CBC: + case QCRYPTO_CIPHER_MODE_XTS: + return true; + default: + return false; + } break; default: return false; } - - switch (mode) { - case QCRYPTO_CIPHER_MODE_ECB: - case QCRYPTO_CIPHER_MODE_CBC: - case QCRYPTO_CIPHER_MODE_XTS: - return true; - case QCRYPTO_CIPHER_MODE_CTR: - return false; - default: - return false; - } } - static QCryptoCipher *qcrypto_cipher_ctx_new(QCryptoCipherAlgorithm alg, QCryptoCipherMode mode, const uint8_t *key, size_t nkey, Error **errp) { - switch (mode) { - case QCRYPTO_CIPHER_MODE_ECB: - case QCRYPTO_CIPHER_MODE_CBC: - case QCRYPTO_CIPHER_MODE_XTS: - break; - default: - error_setg(errp, "Unsupported cipher mode %s", - QCryptoCipherMode_str(mode)); - return NULL; - } - if (!qcrypto_cipher_validate_key_length(alg, mode, nkey, errp)) { return NULL; } switch (alg) { case QCRYPTO_CIPHER_ALG_DES_RFB: - return qcrypto_cipher_init_des_rfb(mode, key, nkey, errp); + if (mode == QCRYPTO_CIPHER_MODE_ECB) { + QCryptoCipherBuiltinDESRFB *ctx; + + ctx = g_new0(QCryptoCipherBuiltinDESRFB, 1); + ctx->base.driver = &qcrypto_cipher_des_rfb_driver; + memcpy(ctx->key, key, sizeof(ctx->key)); + + return &ctx->base; + } + goto bad_mode; + case QCRYPTO_CIPHER_ALG_AES_128: case QCRYPTO_CIPHER_ALG_AES_192: case QCRYPTO_CIPHER_ALG_AES_256: - return qcrypto_cipher_init_aes(mode, key, nkey, errp); + { + QCryptoCipherBuiltinAES *ctx; + const QCryptoCipherDriver *drv; + + switch (mode) { + case QCRYPTO_CIPHER_MODE_ECB: + drv = &qcrypto_cipher_aes_driver_ecb; + break; + case QCRYPTO_CIPHER_MODE_CBC: + drv = &qcrypto_cipher_aes_driver_cbc; + break; + case QCRYPTO_CIPHER_MODE_XTS: + drv = &qcrypto_cipher_aes_driver_xts; + break; + default: + goto bad_mode; + } + + ctx = g_new0(QCryptoCipherBuiltinAES, 1); + ctx->base.driver = drv; + + if (mode == QCRYPTO_CIPHER_MODE_XTS) { + nkey /= 2; + if (AES_set_encrypt_key(key + nkey, nkey * 8, + &ctx->key_tweak.enc)) { + error_setg(errp, "Failed to set encryption key"); + goto error; + } + if (AES_set_decrypt_key(key + nkey, nkey * 8, + &ctx->key_tweak.dec)) { + error_setg(errp, "Failed to set decryption key"); + goto error; + } + } + if (AES_set_encrypt_key(key, nkey * 8, &ctx->key.enc)) { + error_setg(errp, "Failed to set encryption key"); + goto error; + } + if (AES_set_decrypt_key(key, nkey * 8, &ctx->key.dec)) { + error_setg(errp, "Failed to set decryption key"); + goto error; + } + + return &ctx->base; + + error: + g_free(ctx); + return NULL; + } + default: error_setg(errp, "Unsupported cipher algorithm %s", QCryptoCipherAlgorithm_str(alg)); return NULL; } -} - -static void -qcrypto_builtin_cipher_ctx_free(QCryptoCipher *cipher) -{ - QCryptoCipherBuiltin *ctxt - = container_of(cipher, QCryptoCipherBuiltin, base); - - ctxt->free(cipher); -} - -static int -qcrypto_builtin_cipher_encrypt(QCryptoCipher *cipher, - const void *in, - void *out, - size_t len, - Error **errp) -{ - QCryptoCipherBuiltin *ctxt - = container_of(cipher, QCryptoCipherBuiltin, base); - - if (len & (ctxt->blocksize - 1)) { - error_setg(errp, "Length %zu must be a multiple of block size %zu", - len, ctxt->blocksize); - return -1; - } - - return ctxt->encrypt(cipher, in, out, len, errp); -} - - -static int -qcrypto_builtin_cipher_decrypt(QCryptoCipher *cipher, - const void *in, - void *out, - size_t len, - Error **errp) -{ - QCryptoCipherBuiltin *ctxt - = container_of(cipher, QCryptoCipherBuiltin, base); - - if (len & (ctxt->blocksize - 1)) { - error_setg(errp, "Length %zu must be a multiple of block size %zu", - len, ctxt->blocksize); - return -1; - } - - return ctxt->decrypt(cipher, in, out, len, errp); -} - - -static int -qcrypto_builtin_cipher_setiv(QCryptoCipher *cipher, - const uint8_t *iv, size_t niv, - Error **errp) -{ - QCryptoCipherBuiltin *ctxt - = container_of(cipher, QCryptoCipherBuiltin, base); - - return ctxt->setiv(cipher, iv, niv, errp); + bad_mode: + error_setg(errp, "Unsupported cipher mode %s", + QCryptoCipherMode_str(mode)); + return NULL; } - - -static const struct QCryptoCipherDriver qcrypto_cipher_lib_driver = { - .cipher_encrypt = qcrypto_builtin_cipher_encrypt, - .cipher_decrypt = qcrypto_builtin_cipher_decrypt, - .cipher_setiv = qcrypto_builtin_cipher_setiv, - .cipher_free = qcrypto_builtin_cipher_ctx_free, -}; |