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signature/rsa_sig.c: Add checks for the EVP_MD_get_size() #23949

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signature/rsa_sig.c: Add checks for the EVP_MD_get_size() #23949

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10 changes: 8 additions & 2 deletions providers/implementations/signature/rsa_sig.c
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Original file line number Diff line number Diff line change
Expand Up @@ -114,8 +114,14 @@ typedef struct {

static size_t rsa_get_md_size(const PROV_RSA_CTX *prsactx)
{
if (prsactx->md != NULL)
return EVP_MD_get_size(prsactx->md);
int md_size;

if (prsactx->md != NULL) {
md_size = EVP_MD_get_size(prsactx->md);
if (md_size <= 0)
return 0;
return md_size;
}
return 0;
}

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