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<p class="MsoNormal">Hi All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> I am trying to upgrade over application to use openssl 3.0 from openssl 1.0.2.<o:p></o:p></p>
<p class="MsoNormal"> I am trying to replace DES_ede3_cbc_encrypt with EVP API’s as below.<o:p></o:p></p>
<p class="MsoNormal"> DES_ede3_cbc_encrypt accepts 3 keys got from des_key_sched.<o:p></o:p></p>
<p class="MsoNormal"> But for same thing to work using EVP API we have option for only one key.<o:p></o:p></p>
<p class="MsoNormal"> <span style="color:red">EVP_EncryptInit_ex2(ctx, EVP_des_ede3_cbc(), (unsigned char *)key->v, (unsigned char *)iv->v, NULL)<o:p></o:p></span></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> Please suggest if this is correct. Even for decrypt, will passing only one key to <span style="color:red">EVP_EncryptInit_ex2
</span>work<o:p></o:p></p>
<p class="MsoNormal"><span style="color:red"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:red">Old Code: <o:p></o:p></span></p>
<p class="MsoNormal"> if (des_key_sched((void *)key->v, ks1) != 0)<o:p></o:p></p>
<p class="MsoNormal"> return NULL;<o:p></o:p></p>
<p class="MsoNormal"> if (des_key_sched((void *)(key->v + 8), ks2) != 0)<o:p></o:p></p>
<p class="MsoNormal"> return NULL;<o:p></o:p></p>
<p class="MsoNormal"> if (des_key_sched((void *)(key->v + 16), ks3) != 0)<o:p></o:p></p>
<p class="MsoNormal"> return NULL;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> /* decryption data */<o:p></o:p></p>
<p class="MsoNormal"> DES_ede3_cbc_encrypt((const unsigned char *)data->v, (unsigned char *)res->v, data->l,<o:p></o:p></p>
<p class="MsoNormal"> &ks1, &ks2, &ks3, (unsigned char (*)[8])iv->v, DES_ENCRYPT);<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:red">New Code:<o:p></o:p></span></p>
<p class="MsoNormal"> EVP_EncryptInit_ex2(ctx, EVP_des_ede3_cbc(), (unsigned char *)key->v, (unsigned char *)iv->v, NULL)<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> EVP_EncryptUpdate(ctx, (unsigned char *)res->v, &outl, (unsigned char *)data->v,<o:p></o:p></p>
<p class="MsoNormal"> data->l)<o:p></o:p></p>
<p class="MsoNormal"> EVP_EncryptFinal_ex(ctx, (unsigned char *) res->v + outl, &tmpl)
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks and Regards,<o:p></o:p></p>
<p class="MsoNormal">Sunil<o:p></o:p></p>
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