From: Dr. Stephen Henson <steve@openssl.org>
Date: Sun, 6 Jun 1999 18:41:52 +0000 (+0000)
Subject: Change PBE handling a bit more: now the key and iv generator does calls
X-Git-Tag: OpenSSL_0_9_4~238
X-Git-Url: https://git.openssl.org/?p=openssl.git;a=commitdiff_plain;h=2bd83ca1c95405fe03b33cdc98e6fa43e7258246

Change PBE handling a bit more: now the key and iv generator does calls
EVP_CipherInit() this because the IV wont be easily available when doing
PKCS#5 v2.0
---

diff --git a/crypto/evp/evp.h b/crypto/evp/evp.h
index 5e12b21f9c..ad02fd33da 100644
--- a/crypto/evp/evp.h
+++ b/crypto/evp/evp.h
@@ -395,9 +395,9 @@ typedef struct evp_Encode_Ctx_st
 	} EVP_ENCODE_CTX;
 
 /* Password based encryption function */
-typedef int (EVP_PBE_KEYGEN)(const char *pass, int passlen,
+typedef int (EVP_PBE_KEYGEN)(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
 		ASN1_TYPE *param, EVP_CIPHER *cipher,
-                EVP_MD *md, unsigned char *key, unsigned char *iv);
+                EVP_MD *md, int en_de);
 
 #define EVP_PKEY_assign_RSA(pkey,rsa) EVP_PKEY_assign((pkey),EVP_PKEY_RSA,\
 					(char *)(rsa))
@@ -635,9 +635,9 @@ int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c,ASN1_TYPE *type);
 int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c,ASN1_TYPE *type);
 
 /* PKCS5 password based encryption */
-int PKCS5_PBE_keyivgen(const char *pass, int passlen, ASN1_TYPE *param,
-			 EVP_CIPHER *cipher, EVP_MD *md,
-			 unsigned char *key, unsigned char *iv);
+int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
+			 ASN1_TYPE *param, EVP_CIPHER *cipher, EVP_MD *md,
+			 int en_de);
 
 void PKCS5_PBE_add(void);
 
diff --git a/crypto/evp/evp_pbe.c b/crypto/evp/evp_pbe.c
index abc4d0683c..353c3ad667 100644
--- a/crypto/evp/evp_pbe.c
+++ b/crypto/evp/evp_pbe.c
@@ -79,7 +79,6 @@ int EVP_PBE_CipherInit (ASN1_OBJECT *pbe_obj, const char *pass, int passlen,
 {
 
 	EVP_PBE_CTL *pbetmp, pbelu;
-	unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
 	int i;
 	pbelu.pbe_nid = OBJ_obj2nid(pbe_obj);
 	if (pbelu.pbe_nid != NID_undef) i = sk_find(pbe_algs, (char *)&pbelu);
@@ -95,13 +94,12 @@ int EVP_PBE_CipherInit (ASN1_OBJECT *pbe_obj, const char *pass, int passlen,
 	}
 	if (passlen == -1) passlen = strlen(pass);
 	pbetmp = (EVP_PBE_CTL *)sk_value (pbe_algs, i);
-	i = (*pbetmp->keygen)(pass, passlen, param, pbetmp->cipher,
-						 pbetmp->md, key, iv);
+	i = (*pbetmp->keygen)(ctx, pass, passlen, param, pbetmp->cipher,
+						 pbetmp->md, en_de);
 	if (!i) {
 		EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_KEYGEN_FAILURE);
 		return 0;
 	}
-	EVP_CipherInit (ctx, pbetmp->cipher, key, iv, en_de);
 	return 1;	
 }
 
diff --git a/crypto/evp/p5_crpt.c b/crypto/evp/p5_crpt.c
index 857835bc74..2d80c3416a 100644
--- a/crypto/evp/p5_crpt.c
+++ b/crypto/evp/p5_crpt.c
@@ -85,12 +85,13 @@ EVP_PBE_alg_add(NID_pbeWithSHA1AndRC2_CBC, EVP_rc2_64_cbc(), EVP_sha1(),
 #endif
 }
 
-int PKCS5_PBE_keyivgen(const char *pass, int passlen, ASN1_TYPE *param,
-			 EVP_CIPHER *cipher, EVP_MD *md,
-			 unsigned char *key, unsigned char *iv)
+int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
+			 ASN1_TYPE *param, EVP_CIPHER *cipher, EVP_MD *md,
+			 int en_de)
 {
 	EVP_MD_CTX ctx;
 	unsigned char md_tmp[EVP_MAX_MD_SIZE];
+	unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
 	int i;
 	PBEPARAM *pbe;
 	int saltlen, iter;
@@ -122,5 +123,9 @@ int PKCS5_PBE_keyivgen(const char *pass, int passlen, ASN1_TYPE *param,
 	memcpy (key, md_tmp, EVP_CIPHER_key_length(cipher));
 	memcpy (iv, md_tmp + (16 - EVP_CIPHER_iv_length(cipher)),
 						 EVP_CIPHER_iv_length(cipher));
+	EVP_CipherInit(cctx, cipher, key, iv, en_de);
+	memset(md_tmp, 0, EVP_MAX_MD_SIZE);
+	memset(key, 0, EVP_MAX_KEY_LENGTH);
+	memset(iv, 0, EVP_MAX_IV_LENGTH);
 	return 1;
 }
diff --git a/crypto/pkcs12/p12_crpt.c b/crypto/pkcs12/p12_crpt.c
index cb65c42000..ae516eeb8d 100644
--- a/crypto/pkcs12/p12_crpt.c
+++ b/crypto/pkcs12/p12_crpt.c
@@ -82,13 +82,13 @@ EVP_PBE_alg_add(NID_pbe_WithSHA1And40BitRC2_CBC, EVP_rc2_40_cbc(),
 #endif
 }
 
-int PKCS12_PBE_keyivgen (const char *pass, int passlen, ASN1_TYPE *param,
-	     EVP_CIPHER *cipher, EVP_MD *md,
-	     unsigned char *key, unsigned char *iv)
+int PKCS12_PBE_keyivgen (EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
+		ASN1_TYPE *param, EVP_CIPHER *cipher, EVP_MD *md, int en_de)
 {
 	PBEPARAM *pbe;
 	int saltlen, iter;
 	unsigned char *salt, *pbuf;
+	unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
 
 	/* Extract useful info from parameter */
 	pbuf = param->value.sequence->data;
@@ -115,5 +115,8 @@ int PKCS12_PBE_keyivgen (const char *pass, int passlen, ASN1_TYPE *param,
 		return 0;
 	}
 	PBEPARAM_free(pbe);
+	EVP_CipherInit(ctx, cipher, key, iv, en_de);
+	memset(key, 0, EVP_MAX_KEY_LENGTH);
+	memset(iv, 0, EVP_MAX_IV_LENGTH);
 	return 1;
 }
diff --git a/crypto/pkcs12/pkcs12.h b/crypto/pkcs12/pkcs12.h
index 12ef0e5146..1ab91a3c8f 100644
--- a/crypto/pkcs12/pkcs12.h
+++ b/crypto/pkcs12/pkcs12.h
@@ -230,9 +230,9 @@ int PKCS12_key_gen_asc(const char *pass, int passlen, unsigned char *salt,
 		       int saltlen, int id, int iter, int n,
 		       unsigned char *out, const EVP_MD *md_type);
 int PKCS12_key_gen_uni(unsigned char *pass, int passlen, unsigned char *salt, int saltlen, int id, int iter, int n, unsigned char *out, const EVP_MD *md_type);
-int PKCS12_PBE_keyivgen(const char *pass, int passlen, ASN1_TYPE *param,
-			 EVP_CIPHER *cipher, EVP_MD *md_type,
-			 unsigned char *key, unsigned char *iv);
+int PKCS12_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
+			 ASN1_TYPE *param, EVP_CIPHER *cipher, EVP_MD *md_type,
+			 int en_de);
 int PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen,
 			 unsigned char *mac, unsigned int *maclen);
 int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen);