Added PKCS5_PBE_keyivgen_ex() to allow PBKDF1 algorithms to be fetched for a specific...

[openssl.git] / crypto / evp / p5_crpt.c

diff --git a/crypto/evp/p5_crpt.c b/crypto/evp/p5_crpt.c
index 59d1a23ad65926508d5383a51b244931a861987b..abf153cb432ddd595cac4b84f56e0edab17d9782 100644 (file)
--- a/crypto/evp/p5_crpt.c
+++ b/crypto/evp/p5_crpt.c
@@ -15,9 +15,6 @@
 #include <openssl/core_names.h>
 #include <openssl/kdf.h>
 
-#define PKCS5_PBES1_OUTPUT_LENGTH   16
-#define PKCS5_PBES1_KEY_IV_LENGTH   8
-
 /*
  * Doesn't do anything now: Builtin PBE algorithms in static table.
  */
@@ -26,15 +23,18 @@ void PKCS5_PBE_add(void)
 {
 }
 
-int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
-                       ASN1_TYPE *param, const EVP_CIPHER *cipher,
-                       const EVP_MD *md, int en_de)
+int PKCS5_PBE_keyivgen_ex(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
+                          ASN1_TYPE *param, const EVP_CIPHER *cipher,
+                          const EVP_MD *md, int en_de, OSSL_LIB_CTX *libctx,
+                          const char *propq)
 {
-    unsigned char out[PKCS5_PBES1_OUTPUT_LENGTH];
+    unsigned char md_tmp[EVP_MAX_MD_SIZE];
+    unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
     int ivl, kl;
     PBEPARAM *pbe = NULL;
     int saltlen, iter;
     unsigned char *salt;
+    int mdsize;
     int rv = 0;
     EVP_KDF *kdf;
     EVP_KDF_CTX *kctx = NULL;
@@ -55,12 +55,12 @@ int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
     }
 
     ivl = EVP_CIPHER_iv_length(cipher);
-    if (ivl != PKCS5_PBES1_KEY_IV_LENGTH) {
+    if (ivl < 0 || ivl > 16) {
         ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH);
         goto err;
     }
     kl = EVP_CIPHER_key_length(cipher);
-    if (kl != PKCS5_PBES1_KEY_IV_LENGTH) {
+    if (kl < 0 || kl > (int)sizeof(md_tmp)) {
         ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
         goto err;
     }
@@ -77,7 +77,11 @@ int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
     else if (passlen == -1)
         passlen = strlen(pass);
 
-    kdf = EVP_KDF_fetch(NULL, OSSL_KDF_NAME_PBKDF1, NULL);
+    mdsize = EVP_MD_size(md);
+    if (mdsize < 0)
+        goto err;
+
+    kdf = EVP_KDF_fetch(libctx, OSSL_KDF_NAME_PBKDF1, propq);
     kctx = EVP_KDF_CTX_new(kdf);
     EVP_KDF_free(kdf);
     if (kctx == NULL)
@@ -90,16 +94,27 @@ int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
                                             (char *)mdname, 0);
     *p = OSSL_PARAM_construct_end();
-    if (EVP_KDF_derive(kctx, out, PKCS5_PBES1_OUTPUT_LENGTH, params) != 1)
+    if (EVP_KDF_derive(kctx, md_tmp, mdsize, params) != 1)
         goto err;
-
-    if (!EVP_CipherInit_ex(cctx, cipher, NULL, out,
-                           out + PKCS5_PBES1_KEY_IV_LENGTH, en_de))
+    memcpy(key, md_tmp, kl);
+    memcpy(iv, md_tmp + (16 - ivl), ivl);
+    if (!EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de))
         goto err;
-    OPENSSL_cleanse(out, PKCS5_PBES1_OUTPUT_LENGTH);
+    OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE);
+    OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH);
+    OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH);
     rv = 1;
  err:
     EVP_KDF_CTX_free(kctx);
     PBEPARAM_free(pbe);
     return rv;
 }
+
+int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
+                       ASN1_TYPE *param, const EVP_CIPHER *cipher,
+                       const EVP_MD *md, int en_de)
+{
+    return PKCS5_PBE_keyivgen_ex(cctx, pass, passlen, param, cipher, md, en_de,
+                                 NULL, NULL);
+}
+