Hi, The code is a generic OpenSSL C source that will compile using the favorite compiler of your platform. Did I understand your question correctly?
-- Mounir IDRASSI IDRIX http://www.idrix.fr > Hi > > Thanks for your response. In which lplatform do I compile/execute the below > CODE? > I only have UNIX command line and Windows available. > > Regards > Vivek Panikulam > > > > > ________________________________ > From: Mounir IDRASSI <mounir.idra...@idrix.net> > To: openssl-users@openssl.org > Sent: Fri, September 17, 2010 10:07:10 PM > Subject: Re: How to convert RSA public key XML format to PEM or ASCII > format > > Hi, > > To perform the conversion, use your favorite XML library to extract the > BASE64 values in the Modulus and Exponent nodes, then create an EVP_PKEY > structure from these using the functions I'm pasting below. From here, > call PEM_write_PUBKEY to create a PEM file that will contain your RSA > public key and that can be used later by OpenSSL. > > <CODE> > unsigned char *fromBase64(const char* szInput, int* pLen) > { > BIO *b64, *bmem; > size_t length = strlen(szInput); > // The length of BASE64 representation is always bigger > // than the actual data length, so the size given to > // the malloc below is sufficient to hold all the > // decoded data > unsigned char *buffer = (unsigned char *)malloc(length); > > b64 = BIO_new(BIO_f_base64()); > // No LF on the input string > BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL); > bmem = BIO_new_mem_buf((void*)szInput, length); > bmem = BIO_push(b64, bmem); > > *pLen = BIO_read(bmem, buffer, length); > BIO_free_all(bmem); > > return buffer; > } > > BIGNUM* BN_fromBase64(const char* szBase64) > { > BIGNUM* bn = NULL; > int iLen; > unsigned char* pbData = fromBase64(szBase64, &iLen); > if (iLen) > { > bn = BN_bin2bn(pbData, iLen, NULL); > } > free(pbData); > return bn; > } > > EVP_PKEY* RSA_fromBase64(const char* szModulus, const char* szExp) > { > BIGNUM *n = BN_fromBase64(szModulus); > BIGNUM *e = BN_fromBase64(szExp); > > if (!n) printf("Invalid encoding for modulus\n"); > if (!e) printf("Invalid encoding for public exponent\n"); > > if (e && n) > { > EVP_PKEY* pRsaKey = EVP_PKEY_new(); > RSA* rsa = RSA_new(); > rsa->e = e; > rsa->n = n; > EVP_PKEY_assign_RSA(pRsaKey, rsa); > return pRsaKey; > } > else > { > if (n) BN_free(n); > if (e) BN_free(e); > return NULL; > } > } > </CODE> > > Cheers, > -- > Mounir IDRASSI > IDRIX > http://www.idrix.fr > >> Hi All >> >> I have a RSA public key provided in the below format and would like to >> know how >> to convert it into a format like PEM or any other format which can be >> read >> by >> openssl. I didnt find any conclusive solutions for this on www. Will >> the application which generated this key format be capable of generating >> the >> same key in PEM or ASCII format? >> >> <?xml version="1.0" encoding="UTF-8" ?> >> - <RSAKeyValue> >> >><Modulus>dhjffljkglejDHKJFHkjhhhhhSLWSKWLlkNKMNCKJBCKJFKJFBNCJKNLKNCLKMNDLKJSLKWJLJSjsSJJSDDDDDDDDDddddkjswlqqq</Modulus> >>> >> >> <Exponent>AQAB</Exponent> >> </RSAKeyValue> >> >> Regards >> Vivek Panikulam >> >> >> >> > > > ______________________________________________________________________ > OpenSSL Project http://www.openssl.org > User Support Mailing List openssl-users@openssl.org > Automated List Manager majord...@openssl.org > > > > ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org
