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crypto: assert that qcrypto_hash_digest_len is in range
Otherwise unintended results could happen. For example, Coverity reports a division by zero in qcrypto_afsplit_hash. While this cannot really happen, it shows that the contract of qcrypto_hash_digest_len can be improved. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
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@ -36,9 +36,7 @@ static size_t qcrypto_hash_alg_size[QCRYPTO_HASH_ALG__MAX] = {
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size_t qcrypto_hash_digest_len(QCryptoHashAlgorithm alg)
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{
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if (alg >= G_N_ELEMENTS(qcrypto_hash_alg_size)) {
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return 0;
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}
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assert(alg < G_N_ELEMENTS(qcrypto_hash_alg_size));
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return qcrypto_hash_alg_size[alg];
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}
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