diff options
Diffstat (limited to 'crypto/block.c')
| -rw-r--r-- | crypto/block.c | 81 |
1 files changed, 31 insertions, 50 deletions
diff --git a/crypto/block.c b/crypto/block.c index e59d1140fe..8d0e4bdbb2 100644 --- a/crypto/block.c +++ b/crypto/block.c @@ -190,14 +190,21 @@ void qcrypto_block_free(QCryptoBlock *block) } -int qcrypto_block_decrypt_helper(QCryptoCipher *cipher, - size_t niv, - QCryptoIVGen *ivgen, - int sectorsize, - uint64_t offset, - uint8_t *buf, - size_t len, - Error **errp) +typedef int (*QCryptoCipherEncDecFunc)(QCryptoCipher *cipher, + const void *in, + void *out, + size_t len, + Error **errp); + +static int do_qcrypto_block_encdec(QCryptoCipher *cipher, + size_t niv, + QCryptoIVGen *ivgen, + int sectorsize, + uint64_t offset, + uint8_t *buf, + size_t len, + QCryptoCipherEncDecFunc func, + Error **errp) { uint8_t *iv; int ret = -1; @@ -226,8 +233,7 @@ int qcrypto_block_decrypt_helper(QCryptoCipher *cipher, } nbytes = len > sectorsize ? sectorsize : len; - if (qcrypto_cipher_decrypt(cipher, buf, buf, - nbytes, errp) < 0) { + if (func(cipher, buf, buf, nbytes, errp) < 0) { goto cleanup; } @@ -243,7 +249,7 @@ int qcrypto_block_decrypt_helper(QCryptoCipher *cipher, } -int qcrypto_block_encrypt_helper(QCryptoCipher *cipher, +int qcrypto_block_decrypt_helper(QCryptoCipher *cipher, size_t niv, QCryptoIVGen *ivgen, int sectorsize, @@ -252,45 +258,20 @@ int qcrypto_block_encrypt_helper(QCryptoCipher *cipher, size_t len, Error **errp) { - uint8_t *iv; - int ret = -1; - uint64_t startsector = offset / sectorsize; - - assert(QEMU_IS_ALIGNED(offset, sectorsize)); - assert(QEMU_IS_ALIGNED(len, sectorsize)); - - iv = niv ? g_new0(uint8_t, niv) : NULL; - - while (len > 0) { - size_t nbytes; - if (niv) { - if (qcrypto_ivgen_calculate(ivgen, - startsector, - iv, niv, - errp) < 0) { - goto cleanup; - } + return do_qcrypto_block_encdec(cipher, niv, ivgen, sectorsize, offset, + buf, len, qcrypto_cipher_decrypt, errp); +} - if (qcrypto_cipher_setiv(cipher, - iv, niv, - errp) < 0) { - goto cleanup; - } - } - nbytes = len > sectorsize ? sectorsize : len; - if (qcrypto_cipher_encrypt(cipher, buf, buf, - nbytes, errp) < 0) { - goto cleanup; - } - - startsector++; - buf += nbytes; - len -= nbytes; - } - - ret = 0; - cleanup: - g_free(iv); - return ret; +int qcrypto_block_encrypt_helper(QCryptoCipher *cipher, + size_t niv, + QCryptoIVGen *ivgen, + int sectorsize, + uint64_t offset, + uint8_t *buf, + size_t len, + Error **errp) +{ + return do_qcrypto_block_encdec(cipher, niv, ivgen, sectorsize, offset, + buf, len, qcrypto_cipher_encrypt, errp); } |