From a2d76b6b2e324972641749f9fffd9eab27c89509 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Fri, 28 Aug 2020 10:05:19 -0700 Subject: [PATCH] crypto/builtin: Move AES_cbc_encrypt into cipher-builtin.inc.c MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit By making the function private, we will be able to make further simplifications. Re-indent the migrated code and fix the missing braces for CODING_STYLE. Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson Signed-off-by: Daniel P. Berrangé --- crypto/aes.c | 51 --------------------------------- crypto/cipher-builtin.c.inc | 56 +++++++++++++++++++++++++++++++++++++ include/crypto/aes.h | 4 --- 3 files changed, 56 insertions(+), 55 deletions(-) diff --git a/crypto/aes.c b/crypto/aes.c index 0f6a195af8..159800df65 100644 --- a/crypto/aes.c +++ b/crypto/aes.c @@ -1599,54 +1599,3 @@ void AES_decrypt(const unsigned char *in, unsigned char *out, } #endif /* AES_ASM */ - -void AES_cbc_encrypt(const unsigned char *in, unsigned char *out, - const unsigned long length, const AES_KEY *key, - unsigned char *ivec, const int enc) -{ - - unsigned long n; - unsigned long len = length; - unsigned char tmp[AES_BLOCK_SIZE]; - - assert(in && out && key && ivec); - - if (enc) { - while (len >= AES_BLOCK_SIZE) { - for(n=0; n < AES_BLOCK_SIZE; ++n) - tmp[n] = in[n] ^ ivec[n]; - AES_encrypt(tmp, out, key); - memcpy(ivec, out, AES_BLOCK_SIZE); - len -= AES_BLOCK_SIZE; - in += AES_BLOCK_SIZE; - out += AES_BLOCK_SIZE; - } - if (len) { - for(n=0; n < len; ++n) - tmp[n] = in[n] ^ ivec[n]; - for(n=len; n < AES_BLOCK_SIZE; ++n) - tmp[n] = ivec[n]; - AES_encrypt(tmp, tmp, key); - memcpy(out, tmp, AES_BLOCK_SIZE); - memcpy(ivec, tmp, AES_BLOCK_SIZE); - } - } else { - while (len >= AES_BLOCK_SIZE) { - memcpy(tmp, in, AES_BLOCK_SIZE); - AES_decrypt(in, out, key); - for(n=0; n < AES_BLOCK_SIZE; ++n) - out[n] ^= ivec[n]; - memcpy(ivec, tmp, AES_BLOCK_SIZE); - len -= AES_BLOCK_SIZE; - in += AES_BLOCK_SIZE; - out += AES_BLOCK_SIZE; - } - if (len) { - memcpy(tmp, in, AES_BLOCK_SIZE); - AES_decrypt(tmp, tmp, key); - for(n=0; n < len; ++n) - out[n] = tmp[n] ^ ivec[n]; - memcpy(ivec, tmp, AES_BLOCK_SIZE); - } - } -} diff --git a/crypto/cipher-builtin.c.inc b/crypto/cipher-builtin.c.inc index 8e21f2673f..61baad265a 100644 --- a/crypto/cipher-builtin.c.inc +++ b/crypto/cipher-builtin.c.inc @@ -104,6 +104,62 @@ static void do_aes_decrypt_ecb(const void *vctx, } } +static void AES_cbc_encrypt(const unsigned char *in, unsigned char *out, + const unsigned long length, const AES_KEY *key, + unsigned char *ivec, const int enc) +{ + unsigned long n; + unsigned long len = length; + unsigned char tmp[AES_BLOCK_SIZE]; + + assert(in && out && key && ivec); + + if (enc) { + while (len >= AES_BLOCK_SIZE) { + for (n = 0; n < AES_BLOCK_SIZE; ++n) { + tmp[n] = in[n] ^ ivec[n]; + } + AES_encrypt(tmp, out, key); + memcpy(ivec, out, AES_BLOCK_SIZE); + len -= AES_BLOCK_SIZE; + in += AES_BLOCK_SIZE; + out += AES_BLOCK_SIZE; + } + if (len) { + for (n = 0; n < len; ++n) { + tmp[n] = in[n] ^ ivec[n]; + } + for (n = len; n < AES_BLOCK_SIZE; ++n) { + tmp[n] = ivec[n]; + } + AES_encrypt(tmp, tmp, key); + memcpy(out, tmp, AES_BLOCK_SIZE); + memcpy(ivec, tmp, AES_BLOCK_SIZE); + } + } else { + while (len >= AES_BLOCK_SIZE) { + memcpy(tmp, in, AES_BLOCK_SIZE); + AES_decrypt(in, out, key); + for (n = 0; n < AES_BLOCK_SIZE; ++n) { + out[n] ^= ivec[n]; + } + memcpy(ivec, tmp, AES_BLOCK_SIZE); + len -= AES_BLOCK_SIZE; + in += AES_BLOCK_SIZE; + out += AES_BLOCK_SIZE; + } + if (len) { + memcpy(tmp, in, AES_BLOCK_SIZE); + AES_decrypt(tmp, tmp, key); + for (n = 0; n < len; ++n) { + out[n] = tmp[n] ^ ivec[n]; + } + memcpy(ivec, tmp, AES_BLOCK_SIZE); + } + } +} + + static int qcrypto_cipher_encrypt_aes(QCryptoCipher *cipher, const void *in, void *out, diff --git a/include/crypto/aes.h b/include/crypto/aes.h index 12fb321b89..ba297d6a73 100644 --- a/include/crypto/aes.h +++ b/include/crypto/aes.h @@ -16,7 +16,6 @@ typedef struct aes_key_st AES_KEY; #define AES_set_decrypt_key QEMU_AES_set_decrypt_key #define AES_encrypt QEMU_AES_encrypt #define AES_decrypt QEMU_AES_decrypt -#define AES_cbc_encrypt QEMU_AES_cbc_encrypt int AES_set_encrypt_key(const unsigned char *userKey, const int bits, AES_KEY *key); @@ -27,9 +26,6 @@ void AES_encrypt(const unsigned char *in, unsigned char *out, const AES_KEY *key); void AES_decrypt(const unsigned char *in, unsigned char *out, const AES_KEY *key); -void AES_cbc_encrypt(const unsigned char *in, unsigned char *out, - const unsigned long length, const AES_KEY *key, - unsigned char *ivec, const int enc); extern const uint8_t AES_sbox[256]; extern const uint8_t AES_isbox[256];