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EVP_DigestSignFinal: *siglen should not be read if sigret == NULL #17460

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EVP_DigestSignFinal: *siglen should not be read if sigret == NULL #17460

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4 changes: 2 additions & 2 deletions crypto/evp/m_sigver.c
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Expand Up @@ -480,14 +480,14 @@ int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
if (sigret == NULL || (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) != 0)
return pctx->op.sig.signature->digest_sign_final(pctx->op.sig.algctx,
sigret, siglen,
(siglen == NULL) ? 0 : *siglen);
sigret == NULL ? 0 : *siglen);
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dctx = EVP_PKEY_CTX_dup(pctx);
if (dctx == NULL)
return 0;

r = dctx->op.sig.signature->digest_sign_final(dctx->op.sig.algctx,
sigret, siglen,
(siglen == NULL) ? 0 : *siglen);
*siglen);
EVP_PKEY_CTX_free(dctx);
return r;

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