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openssl: avoid BN_num_bits() NULL pointer derefs

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Reported-by: icy17 on github
Fixes #12099
Closes #12100
This commit is contained in:
Daniel Stenberg 2023-10-12 16:00:38 +02:00
parent 4dbc2ad467
commit b9f832edcc
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GPG key ID: 5CC908FDB71E12C2
1 changed files with 2 additions and 2 deletions
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4
lib/vtls/openssl.c
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@ -538,9 +538,9 @@ CURLcode Curl_ossl_certchain(struct Curl_easy *data, SSL *ssl)
#else
RSA_get0_key(rsa, &n, &e, NULL);
#endif /* HAVE_EVP_PKEY_GET_PARAMS */
BIO_printf(mem, "%d", BN_num_bits(n));
BIO_printf(mem, "%d", n ? BN_num_bits(n) : 0);
#else
BIO_printf(mem, "%d", BN_num_bits(rsa->n));
BIO_printf(mem, "%d", rsa->n ? BN_num_bits(rsa->n) : 0);
#endif /* HAVE_OPAQUE_RSA_DSA_DH */
push_certinfo("RSA Public Key", i);
print_pubkey_BN(rsa, n, i);