Make EVP_ENCODE_CTX opaque

Reviewed-by: Rich Salz <rsalz@openssl.org>

crypto/evp/encode.c

@@ -59,6 +59,7 @@
 #include <stdio.h>
 #include "internal/cryptlib.h"
 #include <openssl/evp.h>
+#include "evp_locl.h"
 
 static unsigned char conv_ascii2bin(unsigned char a);
 #ifndef CHARSET_EBCDIC
@@ -140,6 +141,20 @@ static unsigned char conv_ascii2bin(unsigned char a)
 }
 #endif
 
+EVP_ENCODE_CTX *EVP_ENCODE_CTX_new(void)
+{
+    return (EVP_ENCODE_CTX *)OPENSSL_zalloc(sizeof(EVP_ENCODE_CTX));
+}
+
+void EVP_ENCODE_CTX_free(EVP_ENCODE_CTX *ctx)
+{
+    OPENSSL_free(ctx);
+}
+int EVP_ENCODE_CTX_num(EVP_ENCODE_CTX *ctx)
+{
+    return ctx->num;
+}
+
 void EVP_EncodeInit(EVP_ENCODE_CTX *ctx)
 {
     ctx->length = 48;

crypto/evp/evp_locl.h

@@ -279,3 +279,19 @@ 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;
+};

include/openssl/evp.h

@@ -447,22 +447,6 @@ struct evp_cipher_ctx_st {
     unsigned char final[EVP_MAX_BLOCK_LENGTH]; /* possible final block */
 } /* EVP_CIPHER_CTX */ ;
 
-typedef 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;
-} EVP_ENCODE_CTX;
-
 /* Password based encryption function */
 typedef int (EVP_PBE_KEYGEN) (EVP_CIPHER_CTX *ctx, const char *pass,
                               int passlen, ASN1_TYPE *param,
@@ -701,6 +685,9 @@ __owur int EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,
                         EVP_PKEY **pubk, int npubk);
 __owur int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl);
 
+EVP_ENCODE_CTX *EVP_ENCODE_CTX_new(void);
+void EVP_ENCODE_CTX_free(EVP_ENCODE_CTX *ctx);
+int EVP_ENCODE_CTX_num(EVP_ENCODE_CTX *ctx);
 void EVP_EncodeInit(EVP_ENCODE_CTX *ctx);
 void EVP_EncodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl,
                       const unsigned char *in, int inl);

include/openssl/ossl_typ.h

@@ -137,6 +137,8 @@ typedef struct evp_pkey_asn1_method_st EVP_PKEY_ASN1_METHOD;
 typedef struct evp_pkey_method_st EVP_PKEY_METHOD;
 typedef struct evp_pkey_ctx_st EVP_PKEY_CTX;
 
+typedef struct evp_Encode_Ctx_st EVP_ENCODE_CTX;
+
 typedef struct hmac_ctx_st HMAC_CTX;
 
 typedef struct dh_st DH;