On 03/02/2015 06:26, Gayathri Manoj wrote: > Hi Steve, Viktor, > > I have tried with len also, But this also causing seg fault. > my requiremnt is to store max 2048 bit keys. Hence I used length as > 512 +1. > currently i ma getting len value = 28514. > > X509_SIG sig; > X509_ALGOR algor; > ASN1_OCTET_STRING digest; > ASN1_TYPE parameter; > ASN1_item_digest() // to get digest details > sig.algor = &algor; > sig.algor->algorithm=OBJ_nid2obj(NID_md5); There is the problem! FIPS does not allow use of MD5, probably never has. Have you checked if thisreturned NULL to indicate an error finding the MD5 OID? > parameter.type=V_ASN1_NULL; > parameter.value.ptr=NULL; > sig.algor->parameter = ¶meter; > sig.digest = &digest; > sig.digest->data=(unsigned char*)msg; > sig.digest->length=datalen; > len = i2d_X509_SIG(&sig,NULL); Have you checked if this returns a negative value to indicate an error? > > On Mon, Feb 2, 2015 at 9:31 PM, Viktor Dukhovni > <openssl-users at dukhovni.org <mailto:openssl-users at dukhovni.org>> wrote: > > On Mon, Feb 02, 2015 at 07:15:12PM +0530, Gayathri Manoj wrote: > > > unsigned char *ptr, *tmp=NULL; > > X509_SIG sig; > > .... > > How is "sig" initialized? > > > len=i2d_X509_SIG(sig,NULL); > > tmp = (unsigned char*) malloc(513); > > Why 513 and not len? What is the value of len? > > > ptr=tmp; > > i2d_X509_SIG(&sig, &ptr); // here causing problem. > Note to OpenSSL documentation team: The documentation for the OpenSSL X509_SIG data type is circular at best, and refers to PKCS#1 only by name, not by its currently available location (one or more RFCs). Also there are apparently no documented functions using X509_SIG other than to read/write/encode/decode the structure, the closest I could find were some undocumented functions in pkcs12.h . Enjoy Jakob -- Jakob Bohm, CIO, Partner, WiseMo A/S. http://www.wisemo.com Transformervej 29, 2860 S?borg, Denmark. Direct +45 31 13 16 10 This public discussion message is non-binding and may contain errors. WiseMo - Remote Service Management for PCs, Phones and Embedded
