Segmentation fault: what's wrong with this code?

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Hi,

I've written the following code, but I get a segmentation fault (when 
calling EVP_PKEY_free). 
I do not see what's causing this. Can you see it? Any help appreciated.

static void PK_read_spk_from_OSSL_DECODER(char *buffer, long unsigned int 
size) 
{ 
   OSSL_DECODER_CTX *dctx=NULL; 
   EVP_PKEY *spk=NULL; 
   const unsigned char *start=(unsigned char *) buffer;

   /* private key has a PEM encoded key */ 

   dctx=OSSL_DECODER_CTX_new_for_pkey(&spk, "PEM", NULL, NULL, 
EVP_PKEY_KEYPAIR, NULL, NULL); 

   if (dctx==NULL) { 
       fprintf(stdout, "cannot create decoder.\n"); 
       return; 
   } 

   if (OSSL_DECODER_from_data(dctx, &start, &size)<=0) { 
       fprintf(stdout, "decoder error.\n"); 
   } else { 
       fprintf(stdout, "decoder finished ok.\n"); 
       EVP_PKEY_print_private_stdout(spk); 
   } 

   EVP_PKEY_free(spk); 
   OSSL_DECODER_CTX_free(dctx); 
} 


Thanks in advance,

Stef Bon

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<div>Hi,</div><div><br /></div><div>I've written the following code, but I =
get a segmentation fault (when calling EVP_PKEY_free).=C2=A0</div><div>I do=
 not see what's causing this. Can you see it? Any help appreciated.</div><d=
iv><br /></div><div>






<span style=3D"color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); f=
ont-family: Courier New;">static void PK_read_spk_from_OSSL_DECODER(char *b=
uffer, long unsigned int size)</span><span style=3D"color: rgb(0, 0, 0); ba=
ckground-color: rgb(255, 255, 255); font-family: Courier New;">
</span><span style=3D"font-family: Courier New;"><br /><span style=3D"color=
: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">{</span><span style=
=3D"color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);"> =C2=A0=C2=A0=C2=A0OSSL_DECODER_CTX *dctx=3DNULL;</span><span =
style=3D"color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);"> =C2=A0=C2=A0=C2=A0EVP_PKEY *spk=3DNULL;</span><span style=3D"=
color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);"> =C2=A0=C2=A0=C2=A0const unsigned char *start=3D(unsigned char=
 *) buffer;</span><span style=3D"color: rgb(0, 0, 0); background-color: rgb=
(255, 255, 255);"></span><br /><span style=3D"color: rgb(0, 0, 0); backgrou=
nd-color: rgb(255, 255, 255);"></span><span style=3D"color: rgb(0, 0, 0); b=
ackground-color: rgb(255, 255, 255);"><br /></span></span></div><div><span =
style=3D"font-family: Courier New;"><span style=3D"color: rgb(0, 0, 0); bac=
kground-color: rgb(255, 255, 255);">=C2=A0 =C2=A0/* private key has a PEM e=
ncoded key */</span><span style=3D"color: rgb(0, 0, 0); background-color: r=
gb(255, 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);"> =C2=A0=C2=A0=C2=A0dctx=3DOSSL_DECODER_CTX_new_for_pkey(&amp;s=
pk, "PEM", NULL, NULL, EVP_PKEY_KEYPAIR, NULL, NULL);</span><span style=3D"=
color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);"> =C2=A0=C2=A0=C2=A0if (dctx=3D=3DNULL) {</span><span style=3D"=
color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);">
</span><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255, 255, =
255);">=C2=A0 =C2=A0 =C2=A0 =C2=A0fprintf(stdout, "cannot create decoder.\n=
");</span><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255, 25=
5, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);"> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0return;</span><span=
 style=3D"color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);">
</span><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255, 255, =
255);">=C2=A0 =C2=A0}</span><span style=3D"color: rgb(0, 0, 0); background-=
color: rgb(255, 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);"> =C2=A0=C2=A0=C2=A0if (OSSL_DECODER_from_data(dctx, &amp;start=
, &amp;size)&lt;=3D0) {</span><span style=3D"color: rgb(0, 0, 0); backgroun=
d-color: rgb(255, 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);">
</span><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255, 255, =
255);">=C2=A0 =C2=A0 =C2=A0 =C2=A0</span><span style=3D"color: rgb(0, 0, 0)=
; background-color: rgb(255, 255, 255);">fprintf(stdout, "decoder error.\n"=
);</span><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255, 255=
, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);">
</span><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255, 255, =
255);">=C2=A0 =C2=A0} else {</span><span style=3D"color: rgb(0, 0, 0); back=
ground-color: rgb(255, 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);">
</span><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255, 255, =
255);">=C2=A0 =C2=A0 =C2=A0 =C2=A0fprintf(stdout, "decoder finished ok.\n")=
;</span><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255, 255,=
 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);"> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0EVP_PKEY_print_priv=
ate_stdout(spk);</span><span style=3D"color: rgb(0, 0, 0); background-color=
: rgb(255, 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);">
</span><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255, 255, =
255);">=C2=A0 =C2=A0}</span><span style=3D"color: rgb(0, 0, 0); background-=
color: rgb(255, 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);">=C2=A0 =C2=A0EVP_PKEY_free(spk);</span><span style=3D"color: r=
gb(0, 0, 0); background-color: rgb(255, 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);">=C2=A0 =C2=A0OSSL_DECODER_CTX_free(dctx);</span><span style=3D=
"color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
</span><br /><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255,=
 255, 255);">
</span><span style=3D"color: rgb(0, 0, 0); background-color: rgb(255, 255, =
255);">}</span><span style=3D"color: rgb(0, 0, 0); background-color: rgb(25=
5, 255, 255);">
</span><br /></span><span style=3D"font-family: monospace;"><br /><br /></s=
pan>Thanks in advance,</div><div><br /></div><div>Stef Bon</div>

<p></p>

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