Make EVP_ENCODE_CTX opaque
[openssl.git] / crypto / evp / evp_locl.h
index 300f4b4e94872e4d374302900b106c8b7a855ec2..89ac37ed63ee00e7a538899b6d9e3f507a4da7b3 100644 (file)
@@ -1,6 +1,7 @@
 /* evp_locl.h */
-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
- * project 2000.
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
+ * 2000.
  */
 /* ====================================================================
  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
@@ -10,7 +11,7 @@
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer. 
+ *    notice, this list of conditions and the following disclaimer.
  *
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in
  *
  */
 
+/* EVP_MD_CTX related stuff */
+
+struct evp_md_ctx_st {
+    const EVP_MD *digest;
+    ENGINE *engine;             /* functional reference if 'digest' is
+                                 * ENGINE-provided */
+    unsigned long flags;
+    void *md_data;
+    /* Public key context for sign/verify */
+    EVP_PKEY_CTX *pctx;
+    /* Update function: usually copied from EVP_MD */
+    int (*update) (EVP_MD_CTX *ctx, const void *data, size_t count);
+} /* EVP_MD_CTX */ ;
+
 /* Macros to code block cipher wrappers */
 
 /* Wrapper functions for each cipher mode */
 
 #define BLOCK_CIPHER_ecb_loop() \
-       size_t i, bl; \
-       bl = ctx->cipher->block_size;\
-       if(inl < bl) return 1;\
-       inl -= bl; \
-       for(i=0; i <= inl; i+=bl) 
+        size_t i, bl; \
+        bl = ctx->cipher->block_size;\
+        if(inl < bl) return 1;\
+        inl -= bl; \
+        for(i=0; i <= inl; i+=bl)
 
 #define BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
 static int cname##_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 {\
-       BLOCK_CIPHER_ecb_loop() \
-               cprefix##_ecb_encrypt(in + i, out + i, &((kstruct *)ctx->cipher_data)->ksched, ctx->encrypt);\
-       return 1;\
+        BLOCK_CIPHER_ecb_loop() \
+                cprefix##_ecb_encrypt(in + i, out + i, &((kstruct *)ctx->cipher_data)->ksched, ctx->encrypt);\
+        return 1;\
 }
 
 #define EVP_MAXCHUNK ((size_t)1<<(sizeof(long)*8-2))
@@ -80,266 +95,203 @@ static int cname##_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const uns
 #define BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched) \
 static int cname##_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 {\
-       while(inl>=EVP_MAXCHUNK)\
-           {\
-           cprefix##_ofb##cbits##_encrypt(in, out, (long)EVP_MAXCHUNK, &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, &ctx->num);\
-           inl-=EVP_MAXCHUNK;\
-           in +=EVP_MAXCHUNK;\
-           out+=EVP_MAXCHUNK;\
-           }\
-       if (inl)\
-           cprefix##_ofb##cbits##_encrypt(in, out, (long)inl, &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, &ctx->num);\
-       return 1;\
+        while(inl>=EVP_MAXCHUNK)\
+            {\
+            cprefix##_ofb##cbits##_encrypt(in, out, (long)EVP_MAXCHUNK, &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, &ctx->num);\
+            inl-=EVP_MAXCHUNK;\
+            in +=EVP_MAXCHUNK;\
+            out+=EVP_MAXCHUNK;\
+            }\
+        if (inl)\
+            cprefix##_ofb##cbits##_encrypt(in, out, (long)inl, &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, &ctx->num);\
+        return 1;\
 }
 
 #define BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
 static int cname##_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 {\
-       while(inl>=EVP_MAXCHUNK) \
-           {\
-           cprefix##_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, ctx->encrypt);\
-           inl-=EVP_MAXCHUNK;\
-           in +=EVP_MAXCHUNK;\
-           out+=EVP_MAXCHUNK;\
-           }\
-       if (inl)\
-           cprefix##_cbc_encrypt(in, out, (long)inl, &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, ctx->encrypt);\
-       return 1;\
+        while(inl>=EVP_MAXCHUNK) \
+            {\
+            cprefix##_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, ctx->encrypt);\
+            inl-=EVP_MAXCHUNK;\
+            in +=EVP_MAXCHUNK;\
+            out+=EVP_MAXCHUNK;\
+            }\
+        if (inl)\
+            cprefix##_cbc_encrypt(in, out, (long)inl, &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, ctx->encrypt);\
+        return 1;\
 }
 
 #define BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched) \
 static int cname##_cfb##cbits##_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 {\
-       size_t chunk=EVP_MAXCHUNK;\
-       if (cbits==1)  chunk>>=3;\
-       if (inl<chunk) chunk=inl;\
-       while(inl && inl>=chunk)\
-           {\
-           cprefix##_cfb##cbits##_encrypt(in, out, (long)(cbits==1?chunk*8:chunk), &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, &ctx->num, ctx->encrypt);\
-           inl-=chunk;\
-           in +=chunk;\
-           out+=chunk;\
-           if(inl<chunk) chunk=inl;\
-           }\
-       return 1;\
+        size_t chunk=EVP_MAXCHUNK;\
+        if (cbits==1)  chunk>>=3;\
+        if (inl<chunk) chunk=inl;\
+        while(inl && inl>=chunk)\
+            {\
+            cprefix##_cfb##cbits##_encrypt(in, out, (long)((cbits==1) && !(ctx->flags & EVP_CIPH_FLAG_LENGTH_BITS) ?inl*8:inl), &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, &ctx->num, ctx->encrypt);\
+            inl-=chunk;\
+            in +=chunk;\
+            out+=chunk;\
+            if(inl<chunk) chunk=inl;\
+            }\
+        return 1;\
 }
 
 #define BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
-       BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
-       BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched) \
-       BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
-       BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched)
+        BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
+        BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched) \
+        BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
+        BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched)
 
 #define BLOCK_CIPHER_def1(cname, nmode, mode, MODE, kstruct, nid, block_size, \
-                         key_len, iv_len, flags, init_key, cleanup, \
-                         set_asn1, get_asn1, ctrl) \
+                          key_len, iv_len, flags, init_key, cleanup, \
+                          set_asn1, get_asn1, ctrl) \
 static const EVP_CIPHER cname##_##mode = { \
-       nid##_##nmode, block_size, key_len, iv_len, \
-       flags | EVP_CIPH_##MODE##_MODE, \
-       init_key, \
-       cname##_##mode##_cipher, \
-       cleanup, \
-       sizeof(kstruct), \
-       set_asn1, get_asn1,\
-       ctrl, \
-       NULL \
+        nid##_##nmode, block_size, key_len, iv_len, \
+        flags | EVP_CIPH_##MODE##_MODE, \
+        init_key, \
+        cname##_##mode##_cipher, \
+        cleanup, \
+        sizeof(kstruct), \
+        set_asn1, get_asn1,\
+        ctrl, \
+        NULL \
 }; \
 const EVP_CIPHER *EVP_##cname##_##mode(void) { return &cname##_##mode; }
 
 #define BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, \
-                            iv_len, flags, init_key, cleanup, set_asn1, \
-                            get_asn1, ctrl) \
+                             iv_len, flags, init_key, cleanup, set_asn1, \
+                             get_asn1, ctrl) \
 BLOCK_CIPHER_def1(cname, cbc, cbc, CBC, kstruct, nid, block_size, key_len, \
-                 iv_len, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
+                  iv_len, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
 
 #define BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, \
-                            iv_len, cbits, flags, init_key, cleanup, \
-                            set_asn1, get_asn1, ctrl) \
+                             iv_len, cbits, flags, init_key, cleanup, \
+                             set_asn1, get_asn1, ctrl) \
 BLOCK_CIPHER_def1(cname, cfb##cbits, cfb##cbits, CFB, kstruct, nid, 1, \
-                 key_len, iv_len, flags, init_key, cleanup, set_asn1, \
-                 get_asn1, ctrl)
+                  key_len, iv_len, flags, init_key, cleanup, set_asn1, \
+                  get_asn1, ctrl)
 
 #define BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, \
-                            iv_len, cbits, flags, init_key, cleanup, \
-                            set_asn1, get_asn1, ctrl) \
+                             iv_len, cbits, flags, init_key, cleanup, \
+                             set_asn1, get_asn1, ctrl) \
 BLOCK_CIPHER_def1(cname, ofb##cbits, ofb, OFB, kstruct, nid, 1, \
-                 key_len, iv_len, flags, init_key, cleanup, set_asn1, \
-                 get_asn1, ctrl)
+                  key_len, iv_len, flags, init_key, cleanup, set_asn1, \
+                  get_asn1, ctrl)
 
 #define BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, \
-                            iv_len, flags, init_key, cleanup, set_asn1, \
-                            get_asn1, ctrl) \
+                             flags, init_key, cleanup, set_asn1, \
+                             get_asn1, ctrl) \
 BLOCK_CIPHER_def1(cname, ecb, ecb, ECB, kstruct, nid, block_size, key_len, \
-                 iv_len, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
+                  0, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
 
 #define BLOCK_CIPHER_defs(cname, kstruct, \
-                         nid, block_size, key_len, iv_len, cbits, flags, \
-                         init_key, cleanup, set_asn1, get_asn1, ctrl) \
+                          nid, block_size, key_len, iv_len, cbits, flags, \
+                          init_key, cleanup, set_asn1, get_asn1, ctrl) \
 BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, iv_len, flags, \
-                    init_key, cleanup, set_asn1, get_asn1, ctrl) \
+                     init_key, cleanup, set_asn1, get_asn1, ctrl) \
 BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, iv_len, cbits, \
-                    flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
+                     flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
 BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, iv_len, cbits, \
-                    flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
-BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, iv_len, flags, \
-                    init_key, cleanup, set_asn1, get_asn1, ctrl)
-
+                     flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
+BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, flags, \
+                     init_key, cleanup, set_asn1, get_asn1, ctrl)
 
-/*
+/*-
 #define BLOCK_CIPHER_defs(cname, kstruct, \
-                               nid, block_size, key_len, iv_len, flags,\
-                                init_key, cleanup, set_asn1, get_asn1, ctrl)\
+                                nid, block_size, key_len, iv_len, flags,\
+                                 init_key, cleanup, set_asn1, get_asn1, ctrl)\
 static const EVP_CIPHER cname##_cbc = {\
-       nid##_cbc, block_size, key_len, iv_len, \
-       flags | EVP_CIPH_CBC_MODE,\
-       init_key,\
-       cname##_cbc_cipher,\
-       cleanup,\
-       sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
-               sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
-       set_asn1, get_asn1,\
-       ctrl, \
-       NULL \
+        nid##_cbc, block_size, key_len, iv_len, \
+        flags | EVP_CIPH_CBC_MODE,\
+        init_key,\
+        cname##_cbc_cipher,\
+        cleanup,\
+        sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
+                sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
+        set_asn1, get_asn1,\
+        ctrl, \
+        NULL \
 };\
 const EVP_CIPHER *EVP_##cname##_cbc(void) { return &cname##_cbc; }\
 static const EVP_CIPHER cname##_cfb = {\
-       nid##_cfb64, 1, key_len, iv_len, \
-       flags | EVP_CIPH_CFB_MODE,\
-       init_key,\
-       cname##_cfb_cipher,\
-       cleanup,\
-       sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
-               sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
-       set_asn1, get_asn1,\
-       ctrl,\
-       NULL \
+        nid##_cfb64, 1, key_len, iv_len, \
+        flags | EVP_CIPH_CFB_MODE,\
+        init_key,\
+        cname##_cfb_cipher,\
+        cleanup,\
+        sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
+                sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
+        set_asn1, get_asn1,\
+        ctrl,\
+        NULL \
 };\
 const EVP_CIPHER *EVP_##cname##_cfb(void) { return &cname##_cfb; }\
 static const EVP_CIPHER cname##_ofb = {\
-       nid##_ofb64, 1, key_len, iv_len, \
-       flags | EVP_CIPH_OFB_MODE,\
-       init_key,\
-       cname##_ofb_cipher,\
-       cleanup,\
-       sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
-               sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
-       set_asn1, get_asn1,\
-       ctrl,\
-       NULL \
+        nid##_ofb64, 1, key_len, iv_len, \
+        flags | EVP_CIPH_OFB_MODE,\
+        init_key,\
+        cname##_ofb_cipher,\
+        cleanup,\
+        sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
+                sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
+        set_asn1, get_asn1,\
+        ctrl,\
+        NULL \
 };\
 const EVP_CIPHER *EVP_##cname##_ofb(void) { return &cname##_ofb; }\
 static const EVP_CIPHER cname##_ecb = {\
-       nid##_ecb, block_size, key_len, iv_len, \
-       flags | EVP_CIPH_ECB_MODE,\
-       init_key,\
-       cname##_ecb_cipher,\
-       cleanup,\
-       sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
-               sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
-       set_asn1, get_asn1,\
-       ctrl,\
-       NULL \
+        nid##_ecb, block_size, key_len, iv_len, \
+        flags | EVP_CIPH_ECB_MODE,\
+        init_key,\
+        cname##_ecb_cipher,\
+        cleanup,\
+        sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
+                sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
+        set_asn1, get_asn1,\
+        ctrl,\
+        NULL \
 };\
 const EVP_CIPHER *EVP_##cname##_ecb(void) { return &cname##_ecb; }
 */
 
 #define IMPLEMENT_BLOCK_CIPHER(cname, ksched, cprefix, kstruct, nid, \
-                              block_size, key_len, iv_len, cbits, \
-                              flags, init_key, \
-                              cleanup, set_asn1, get_asn1, ctrl) \
-       BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
-       BLOCK_CIPHER_defs(cname, kstruct, nid, block_size, key_len, iv_len, \
-                         cbits, flags, init_key, cleanup, set_asn1, \
-                         get_asn1, ctrl)
-
-#define EVP_C_DATA(kstruct, ctx)       ((kstruct *)(ctx)->cipher_data)
-
-#define IMPLEMENT_CFBR(cipher,cprefix,kstruct,ksched,keysize,cbits,iv_len) \
-       BLOCK_CIPHER_func_cfb(cipher##_##keysize,cprefix,cbits,kstruct,ksched) \
-       BLOCK_CIPHER_def_cfb(cipher##_##keysize,kstruct, \
-                            NID_##cipher##_##keysize, keysize/8, iv_len, cbits, \
-                            0, cipher##_init_key, NULL, \
-                            EVP_CIPHER_set_asn1_iv, \
-                            EVP_CIPHER_get_asn1_iv, \
-                            NULL)
-
-struct evp_pkey_ctx_st
-       {
-       /* Method associated with this operation */
-       const EVP_PKEY_METHOD *pmeth;
-       /* Engine that implements this method or NULL if builtin */
-       ENGINE *engine;
-       /* Key: may be NULL */
-       EVP_PKEY *pkey;
-       /* Peer key for key agreement, may be NULL */
-       EVP_PKEY *peerkey;
-       /* Actual operation */
-       int operation;
-       /* Algorithm specific data */
-       void *data;
-       /* Application specific data */
-       void *app_data;
-       /* Keygen callback */
-       EVP_PKEY_gen_cb *pkey_gencb;
-       /* implementation specific keygen data */
-       int *keygen_info;
-       int keygen_info_count;
-       } /* EVP_PKEY_CTX */;
-
-#define EVP_PKEY_FLAG_DYNAMIC  1
-
-struct evp_pkey_method_st
-       {
-       int pkey_id;
-       int flags;
-
-       int (*init)(EVP_PKEY_CTX *ctx);
-       int (*copy)(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src);
-       void (*cleanup)(EVP_PKEY_CTX *ctx);
-
-       int (*paramgen_init)(EVP_PKEY_CTX *ctx);
-       int (*paramgen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
-
-       int (*keygen_init)(EVP_PKEY_CTX *ctx);
-       int (*keygen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
-
-       int (*sign_init)(EVP_PKEY_CTX *ctx);
-       int (*sign)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
-                               const unsigned char *tbs, size_t tbslen);
-
-       int (*verify_init)(EVP_PKEY_CTX *ctx);
-       int (*verify)(EVP_PKEY_CTX *ctx,
-                               const unsigned char *sig, size_t siglen,
-                               const unsigned char *tbs, size_t tbslen);
-
-       int (*verify_recover_init)(EVP_PKEY_CTX *ctx);
-       int (*verify_recover)(EVP_PKEY_CTX *ctx,
-                               unsigned char *rout, size_t *routlen,
-                               const unsigned char *sig, size_t siglen);
-
-       int (*signctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
-       int (*signctx)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
-                                       EVP_MD_CTX *mctx);
-
-       int (*verifyctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
-       int (*verifyctx)(EVP_PKEY_CTX *ctx, const unsigned char *sig,int siglen,
-                                       EVP_MD_CTX *mctx);
-
-       int (*encrypt_init)(EVP_PKEY_CTX *ctx);
-       int (*encrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
-                                       const unsigned char *in, size_t inlen);
-
-       int (*decrypt_init)(EVP_PKEY_CTX *ctx);
-       int (*decrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
-                                       const unsigned char *in, size_t inlen);
-
-       int (*derive_init)(EVP_PKEY_CTX *ctx);
-       int (*derive)(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
-
-       int (*ctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2);
-       int (*ctrl_str)(EVP_PKEY_CTX *ctx, const char *type, const char *value);
-
-
-       } /* EVP_PKEY_METHOD */;
-
-void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx);
+                               block_size, key_len, iv_len, cbits, \
+                               flags, init_key, \
+                               cleanup, set_asn1, get_asn1, ctrl) \
+        BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
+        BLOCK_CIPHER_defs(cname, kstruct, nid, block_size, key_len, iv_len, \
+                          cbits, flags, init_key, cleanup, set_asn1, \
+                          get_asn1, ctrl)
+
+#define EVP_C_DATA(kstruct, ctx)        ((kstruct *)(ctx)->cipher_data)
+
+#define IMPLEMENT_CFBR(cipher,cprefix,kstruct,ksched,keysize,cbits,iv_len,fl) \
+        BLOCK_CIPHER_func_cfb(cipher##_##keysize,cprefix,cbits,kstruct,ksched) \
+        BLOCK_CIPHER_def_cfb(cipher##_##keysize,kstruct, \
+                             NID_##cipher##_##keysize, keysize/8, iv_len, cbits, \
+                             (fl)|EVP_CIPH_FLAG_DEFAULT_ASN1, \
+                             cipher##_init_key, NULL, NULL, NULL, NULL)
+
+int PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass,
+                             int passlen, ASN1_TYPE *param,
+                             const EVP_CIPHER *c, const EVP_MD *md,
+                             int en_de);
+
+struct evp_Encode_Ctx_st {
+    /* number saved in a partial encode/decode */
+    int num;
+    /*
+     * The length is either the output line length (in input bytes) or the
+     * shortest input line length that is ok.  Once decoding begins, the
+     * length is adjusted up each time a longer line is decoded
+     */
+    int length;
+    /* data to encode */
+    unsigned char enc_data[80];
+    /* number read on current line */
+    int line_num;
+    int expect_nl;
+};