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fish: enable the legacy provider if build against OpenSSL3

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OpenSSL 3.0 disables a number of "legacy" algorithms by default, and we
need to enable them manually using their provider system. Note that
explicitly loading a provider will disable the implicit default
provider, which is why we need to load it explicitly.

Closes #2629

Signed-off-by: Simon Chopin <simon.chopin@canonical.com>

V2:
  * use a local OSSL_LIB_CTX to avoid leaking the legacy algorithms
    into the main SSL context.
  * Simplify the fish_init() error paths by calling fish_deinit()
This commit is contained in:
Simon Chopin
2021-11-30 13:56:56 +01:00
committed by Patrick
parent 8443755772
commit bbd60a96ec
4 changed files with 68 additions and 1 deletions
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2
plugins/fishlim/fish.h
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@@ -35,6 +35,8 @@ enum fish_mode {
FISH_CBC_MODE = 0x2
};
int fish_init(void);
void fish_deinit(void);
char *fish_base64_encode(const char *message, size_t message_len);
char *fish_base64_decode(const char *message, size_t *final_len);
char *fish_encrypt(const char *key, size_t keylen, const char *message, size_t message_len, enum fish_mode mode);