jepler/ungeli
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update to openssl of debian bullseye

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This commit is contained in:
Jeff Epler 2021-09-20 17:31:46 -05:00
parent da9e5d2bd4
commit fa738a53e1
2 changed files with 14 additions and 16 deletions
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6
README.md
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@ -1,7 +1,7 @@
# ungeli
I use geli-encrypted devices for offsite backups.
However, I worry that in the event of a disaster I'm more likely to
I used to use geli-encrypted devices for offsite backups.
However, I worried that in the event of a disaster I'm more likely to
have a Linux machine on hand than a (k)FreeBSD machine, so I'd like
to be able to read my backups.
@ -24,7 +24,7 @@ I would be interested in passing this project to a new maintainer.
## Requirements
* Gnu99-compatible C compiler (tested with gcc 4.8)
* OpenSSL (recent version required for AES-128-XTS) (tested with 1.0.1e)
* OpenSSL (tested with 1.1.1k)
* Optional: Linux (for network block device support)
[pc]: https://www.dlitz.net/software/pycrypto/

24
ungeli.c
View file

@ -289,13 +289,12 @@ void eli_decrypt_range(int ifd, unsigned char *ob, uint64_t byteoffset, uint64_t
unsigned char ib[count];
read_full(ifd, ib, count);
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx);
EVP_DecryptInit_ex(&ctx, EVP_aes_128_xts(), NULL, bkey, biv);
EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new();
EVP_DecryptInit_ex(ctx, EVP_aes_128_xts(), NULL, bkey, biv);
int out_len, final_out_len;
EVP_DecryptUpdate(&ctx, ob, &out_len, ib, count);
EVP_DecryptFinal_ex(&ctx, ob+out_len, &final_out_len);
EVP_CIPHER_CTX_cleanup(&ctx);
EVP_DecryptUpdate(ctx, ob, &out_len, ib, count);
EVP_DecryptFinal_ex(ctx, ob+out_len, &final_out_len);
EVP_CIPHER_CTX_free(ctx);
if(out_len + final_out_len != count) fatalf("eli_decrypt_range EVP final_out_len %d != %d+%d", count, out_len, final_out_len);
}
@ -521,14 +520,13 @@ eli_crypto_decrypt(int ealgo, unsigned char *enckey, size_t keylen,
if(ealgo != CRYPTO_AES_XTS) fatal("unsupported ealgo");
if(keylen != 16) fatal("unsupported key length");
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx);
EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, enckey, 0);
EVP_CIPHER_CTX_set_padding(&ctx, 0);
EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new();
EVP_DecryptInit_ex(ctx, EVP_aes_128_cbc(), NULL, enckey, 0);
EVP_CIPHER_CTX_set_padding(ctx, 0);
int out_len, final_out_len;
EVP_DecryptUpdate(&ctx, dest, &out_len, src, len);
EVP_DecryptFinal_ex(&ctx, dest+out_len, &final_out_len);
EVP_CIPHER_CTX_cleanup(&ctx);
EVP_DecryptUpdate(ctx, dest, &out_len, src, len);
EVP_DecryptFinal_ex(ctx, dest+out_len, &final_out_len);
EVP_CIPHER_CTX_free(ctx);
if(out_len + final_out_len != len) fatalf("eli_crypto_decrypt EVP final_out_len %d != %d+%d", len, out_len, final_out_len);
}