Check public key is not NULL.
CVE-2015-0288 PR#3708 Reviewed-by: Matt Caswell <matt@openssl.org> (cherry picked from commit 28a00bcd8e318da18031b2ac8778c64147cd54f9)
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@ -92,6 +92,8 @@ X509_REQ *X509_to_X509_REQ(X509 *x, EVP_PKEY *pkey, const EVP_MD *md)
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goto err;
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pktmp = X509_get_pubkey(x);
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if (pktmp == NULL)
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goto err;
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i = X509_REQ_set_pubkey(ret, pktmp);
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EVP_PKEY_free(pktmp);
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if (!i)
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