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Code Activity

MDEV-30389 Ensure correct dlen during encryption

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This patch ensures that all direct and indirect calls to
encryption_crypt provide a `dlen` value correctly initialized to the
destination buffer length, allowing encryption plugins to verify
available space. It also adds assertions to verify related invariants.

Signed-off-by: Trevor Gross <tmgross@umich.edu>
This commit is contained in:
Trevor Gross
2023-01-12 04:58:16 -05:00
committed by Sergei Golubchik
parent 01e9e3955a
commit b91d5bcedc
17 changed files with 84 additions and 30 deletions
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6
include/mysql/plugin_encryption.h
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@@ -96,8 +96,11 @@ struct st_mariadb_encryption
/**
processes (encrypts or decrypts) a chunk of data
writes the output to th dst buffer. note that it might write
writes the output to the dst buffer. note that it might write
more bytes that were in the input. or less. or none at all.
dlen points to the starting lenght of the output buffer. Upon return, it
should be set to the number of bytes written.
*/
int (*crypt_ctx_update)(void *ctx, const unsigned char* src, unsigned int slen,
unsigned char* dst, unsigned int* dlen);
@@ -123,4 +126,3 @@ struct st_mariadb_encryption
}
#endif
#endif