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Red Hat Bugzilla – Attachment 848771 Details for
Bug 1051733
gcrypt KDF implementation is very slow
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[patch]
Proposed patch
fix-kdf.patch (text/plain), 945 bytes, created by
Milan Broz
on 2014-01-11 22:26:34 UTC
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Description:
Proposed patch
Filename:
MIME Type:
Creator:
Milan Broz
Created:
2014-01-11 22:26:34 UTC
Size:
945 bytes
patch
obsolete
>The key should be set only once not in every iteration. > >--- libgcrypt-1.5.3.old/cipher/kdf.c 2013-07-25 11:10:03.000000000 +0200 >+++ libgcrypt-1.5.3/cipher/kdf.c 2014-01-11 23:22:51.345411121 +0100 >@@ -172,19 +172,20 @@ pkdf2 (const void *passphrase, size_t pa > return ec; > } > >+ ec = gpg_err_code (gcry_md_setkey (md, passphrase, passphraselen)); >+ if (ec) >+ { >+ gcry_md_close (md); >+ gcry_free (sbuf); >+ return ec; >+ } >+ > /* Step 3 and 4. */ > memcpy (sbuf, salt, saltlen); > for (lidx = 1; lidx <= l; lidx++) > { > for (iter = 0; iter < iterations; iter++) > { >- ec = gpg_err_code (gcry_md_setkey (md, passphrase, passphraselen)); >- if (ec) >- { >- gcry_md_close (md); >- gcry_free (sbuf); >- return ec; >- } > if (!iter) /* Compute U_1: */ > { > sbuf[saltlen] = (lidx >> 24);
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