1 files changed, 42 insertions, 12 deletions

diff --git a/openssl/crypto/asn1/p5_pbev2.c b/openssl/crypto/asn1/p5_pbev2.c
index 2b0516afe..cb49b6651 100644
--- a/openssl/crypto/asn1/p5_pbev2.c
+++ b/openssl/crypto/asn1/p5_pbev2.c
@@ -82,10 +82,13 @@ IMPLEMENT_ASN1_FUNCTIONS(PBKDF2PARAM)
 
 /* Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm:
  * yes I know this is horrible!
+ *
+ * Extended version to allow application supplied PRF NID and IV.
  */
 
-X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
-				 unsigned char *salt, int saltlen)
+X509_ALGOR *PKCS5_pbe2_set_iv(const EVP_CIPHER *cipher, int iter,
+				 unsigned char *salt, int saltlen,
+				 unsigned char *aiv, int prf_nid)
 {
 	X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL;
 	int alg_nid;
@@ -98,7 +101,7 @@ X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
 
 	alg_nid = EVP_CIPHER_type(cipher);
 	if(alg_nid == NID_undef) {
-		ASN1err(ASN1_F_PKCS5_PBE2_SET,
+		ASN1err(ASN1_F_PKCS5_PBE2_SET_IV,
 				ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
 		goto err;
 	}
@@ -113,20 +116,33 @@ X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
 	if(!(scheme->parameter = ASN1_TYPE_new())) goto merr;
 
 	/* Create random IV */
-	if (EVP_CIPHER_iv_length(cipher) &&
-		RAND_pseudo_bytes(iv, EVP_CIPHER_iv_length(cipher)) < 0)
-  		goto err;
+	if (EVP_CIPHER_iv_length(cipher))
+		{
+		if (aiv)
+			memcpy(iv, aiv, EVP_CIPHER_iv_length(cipher));
+		else if (RAND_pseudo_bytes(iv, EVP_CIPHER_iv_length(cipher)) < 0)
+  			goto err;
+		}
 
 	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,
+		ASN1err(ASN1_F_PKCS5_PBE2_SET_IV,
 					ASN1_R_ERROR_SETTING_CIPHER_PARAMS);
 		EVP_CIPHER_CTX_cleanup(&ctx);
 		goto err;
 	}
+	/* If prf NID unspecified see if cipher has a preference.
+	 * An error is OK here: just means use default PRF.
+	 */
+	if ((prf_nid == -1) && 
+	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 +170,15 @@ 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 */
 
@@ -164,7 +188,7 @@ X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
 
 	if(!(pbe2->keyfunc->parameter = ASN1_TYPE_new())) goto merr;
 
-	if(!ASN1_pack_string_of(PBKDF2PARAM, kdf, i2d_PBKDF2PARAM,
+	if(!ASN1_item_pack(kdf, ASN1_ITEM_rptr(PBKDF2PARAM),
 			 &pbe2->keyfunc->parameter->value.sequence)) goto merr;
 	pbe2->keyfunc->parameter->type = V_ASN1_SEQUENCE;
 
@@ -180,7 +204,7 @@ X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
 
 	/* Encode PBE2PARAM into parameter */
 
-	if(!ASN1_pack_string_of(PBE2PARAM, pbe2, i2d_PBE2PARAM,
+	if(!ASN1_item_pack(pbe2, ASN1_ITEM_rptr(PBE2PARAM),
 				 &ret->parameter->value.sequence)) goto merr;
 	ret->parameter->type = V_ASN1_SEQUENCE;
 
@@ -190,7 +214,7 @@ X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
 	return ret;
 
 	merr:
-	ASN1err(ASN1_F_PKCS5_PBE2_SET,ERR_R_MALLOC_FAILURE);
+	ASN1err(ASN1_F_PKCS5_PBE2_SET_IV,ERR_R_MALLOC_FAILURE);
 
 	err:
 	PBE2PARAM_free(pbe2);
@@ -203,3 +227,9 @@ X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
 	return NULL;
 
 }
+
+X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
+				 unsigned char *salt, int saltlen)
+	{
+	return PKCS5_pbe2_set_iv(cipher, iter, salt, saltlen, NULL, -1);
+	}