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evp: fix return code check.

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The return from evp_do_md_getparams() is 0 for failure and -1 for not being
a provided algorithm.  The code in evp_md_cache_constants() failed to check
the return code properly.  In this case it was harmless but better to fix it.

Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
Reviewed-by: Ben Kaduk <kaduk@mit.edu>
(Merged from https://github.com/openssl/openssl/pull/15208)
This commit is contained in:
Pauli 2021-05-10 14:13:30 +10:00
parent 4885ecffc7
commit 0df56c30f7
1 changed files with 1 additions and 1 deletions
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2
crypto/evp/digest.c
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@ -882,7 +882,7 @@ static int evp_md_cache_constants(EVP_MD *md)
params[3] = OSSL_PARAM_construct_int(OSSL_DIGEST_PARAM_ALGID_ABSENT,
&algid_absent);
params[4] = OSSL_PARAM_construct_end();
ok = evp_do_md_getparams(md, params);
ok = evp_do_md_getparams(md, params) > 0;
if (mdsize > INT_MAX || blksz > INT_MAX)
ok = 0;
if (ok) {