Add PRF preference ctrl to ciphers.
[openssl.git] / crypto / asn1 / p5_pbev2.c
index c834a38..ef2684b 100644 (file)
@@ -95,6 +95,7 @@ X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
        PBE2PARAM *pbe2 = NULL;
        ASN1_OCTET_STRING *osalt = NULL;
        ASN1_OBJECT *obj;
+       int prf_nid;
 
        alg_nid = EVP_CIPHER_type(cipher);
        if(alg_nid == NID_undef) {
@@ -119,7 +120,7 @@ X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
 
        EVP_CIPHER_CTX_init(&ctx);
 
-       /* Dummy cipherinit to just setup the IV */
+       /* Dummy cipherinit to just setup the IV, and PRF */
        EVP_CipherInit_ex(&ctx, cipher, NULL, NULL, iv, 0);
        if(EVP_CIPHER_param_to_asn1(&ctx, scheme->parameter) < 0) {
                ASN1err(ASN1_F_PKCS5_PBE2_SET,
@@ -127,6 +128,12 @@ X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
                EVP_CIPHER_CTX_cleanup(&ctx);
                goto err;
        }
+       /* An error is OK here: just means use default PRF */
+       if (EVP_CIPHER_CTX_ctrl(&ctx, EVP_CTRL_PBE_PRF_NID, 0, &prf_nid) <= 0)
+               {
+               ERR_clear_error();
+               prf_nid = NID_hmacWithSHA1;
+               }
        EVP_CIPHER_CTX_cleanup(&ctx);
 
        if(!(kdf = PBKDF2PARAM_new())) goto merr;
@@ -154,7 +161,15 @@ X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
                                 EVP_CIPHER_key_length(cipher))) goto merr;
        }
 
-       /* prf can stay NULL because we are using hmacWithSHA1 */
+       /* prf can stay NULL if we are using hmacWithSHA1 */
+       if (prf_nid != NID_hmacWithSHA1)
+               {
+               kdf->prf = X509_ALGOR_new();
+               if (!kdf->prf)
+                       goto merr;
+               X509_ALGOR_set0(kdf->prf, OBJ_nid2obj(prf_nid),
+                                       V_ASN1_NULL, NULL);
+               }
 
        /* Now setup the PBE2PARAM keyfunc structure */