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Properly handle a partial block in OCB mode

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If we have previously been passed a partial block in an "Update" call then
make sure we properly increment the output buffer when we use it.

Fixes #2273

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2275)
This commit is contained in:
Matt Caswell 2017-01-23 12:44:48 +00:00
parent 0ba5a9eaa0
commit 7c12c7b61c
1 changed files with 2 additions and 0 deletions
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crypto/evp/e_aes.c
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@ -2587,6 +2587,8 @@ static int aes_ocb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
}
written_len = AES_BLOCK_SIZE;
*buf_len = 0;
if (out != NULL)
out += AES_BLOCK_SIZE;
}
/* Do we have a partial block to handle at the end? */