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dh_exch.c: Add check for OPENSSL_strdup

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Since the OPENSSL_strdup() may return NULL if allocation
fails, it should be better to check the return value.

Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/17651)
This commit is contained in:
Jiasheng Jiang 2022-02-07 19:13:43 +08:00 committed by Tomas Mraz
parent 7585073892
commit c920020f0b
1 changed files with 16 additions and 4 deletions
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20
providers/implementations/exchange/dh_exch.c
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@ -292,7 +292,12 @@ static void *dh_dupctx(void *vpdhctx)
if (dstctx->kdf_ukm == NULL)
goto err;
}
dstctx->kdf_cekalg = OPENSSL_strdup(srcctx->kdf_cekalg);
if (srcctx->kdf_cekalg != NULL) {
dstctx->kdf_cekalg = OPENSSL_strdup(srcctx->kdf_cekalg);
if (dstctx->kdf_cekalg == NULL)
goto err;
}
return dstctx;
err:
@ -390,9 +395,16 @@ static int dh_set_ctx_params(void *vpdhctx, const OSSL_PARAM params[])
p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_CEK_ALG);
if (p != NULL) {
str = name;
if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(name)))
return 0;
pdhctx->kdf_cekalg = OPENSSL_strdup(name);
OPENSSL_free(pdhctx->kdf_cekalg);
pdhctx->kdf_cekalg = NULL;
if (p->data != NULL && p->data_size != 0) {
if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(name)))
return 0;
pdhctx->kdf_cekalg = OPENSSL_strdup(name);
if (pdhctx->kdf_cekalg == NULL)
return 0;
}
}
return 1;
}