Make D-H safer, include well-known primes.

[openssl.git] / crypto / dh / dh.h

diff --git a/crypto/dh/dh.h b/crypto/dh/dh.h
index 62dba4055c7fc84e7ec77fa276c2684546ad0906..7871882e35a40865e43e64f034735fca0c794b6e 100644 (file)
--- a/crypto/dh/dh.h
+++ b/crypto/dh/dh.h
@@ -59,6 +59,8 @@
 #ifndef HEADER_DH_H
 #define HEADER_DH_H
 
+#include <openssl/e_os2.h>
+
 #ifdef OPENSSL_NO_DH
 #error DH is disabled.
 #endif
@@ -66,19 +68,30 @@
 #ifndef OPENSSL_NO_BIO
 #include <openssl/bio.h>
 #endif
-#include <openssl/bn.h>
-#include <openssl/crypto.h>
 #include <openssl/ossl_typ.h>
+#ifndef OPENSSL_NO_DEPRECATED
+#include <openssl/bn.h>
+#endif
        
-#define DH_FLAG_CACHE_MONT_P   0x01
+#define DH_FLAG_CACHE_MONT_P     0x01
+#define DH_FLAG_NO_EXP_CONSTTIME 0x02 /* new with 0.9.7h; the built-in DH
+                                       * implementation now uses constant time
+                                       * modular exponentiation for secret exponents
+                                       * by default. This flag causes the
+                                       * faster variable sliding window method to
+                                       * be used for all exponents.
+                                       */
 
 #ifdef  __cplusplus
 extern "C" {
 #endif
 
-typedef struct dh_st DH;
+/* Already defined in ossl_typ.h */
+/* typedef struct dh_st DH; */
+/* typedef struct dh_method DH_METHOD; */
 
-typedef struct dh_method {
+struct dh_method
+       {
        const char *name;
        /* Methods here */
        int (*generate_key)(DH *dh);
@@ -93,7 +106,7 @@ typedef struct dh_method {
        char *app_data;
        /* If this is non-NULL, it will be used to generate parameters */
        int (*generate_params)(DH *dh, int prime_len, int generator, BN_GENCB *cb);
-} DH_METHOD;
+       };
 
 struct dh_st
        {
@@ -108,7 +121,7 @@ struct dh_st
        BIGNUM *priv_key;       /* x */
 
        int flags;
-       char *method_mont_p;
+       BN_MONT_CTX *method_mont_p;
        /* Place holders if we want to do X9.42 DH */
        BIGNUM *q;
        BIGNUM *j;
@@ -132,25 +145,21 @@ struct dh_st
 #define DH_UNABLE_TO_CHECK_GENERATOR   0x04
 #define DH_NOT_SUITABLE_GENERATOR      0x08
 
+/* DH_check_pub_key error codes */
+#define DH_CHECK_PUBKEY_TOO_SMALL      0x01
+#define DH_CHECK_PUBKEY_TOO_LARGE      0x02
+
 /* primes p where (p-1)/2 is prime too are called "safe"; we define
    this for backward compatibility: */
 #define DH_CHECK_P_NOT_STRONG_PRIME    DH_CHECK_P_NOT_SAFE_PRIME
 
-#define DHparams_dup(x) (DH *)ASN1_dup((int (*)())i2d_DHparams, \
-               (char *(*)())d2i_DHparams,(char *)(x))
+#define DHparams_dup(x) ASN1_dup_of_const(DH,i2d_DHparams,d2i_DHparams,x)
 #define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \
                (char *(*)())d2i_DHparams,(fp),(unsigned char **)(x))
 #define i2d_DHparams_fp(fp,x) ASN1_i2d_fp(i2d_DHparams,(fp), \
                (unsigned char *)(x))
-#define d2i_DHparams_bio(bp,x) (DH *)ASN1_d2i_bio((char *(*)())DH_new, \
-               (char *(*)())d2i_DHparams,(bp),(unsigned char **)(x))
-#ifdef  __cplusplus
-#define i2d_DHparams_bio(bp,x) ASN1_i2d_bio((int (*)())i2d_DHparams,(bp), \
-               (unsigned char *)(x))
-#else
-#define i2d_DHparams_bio(bp,x) ASN1_i2d_bio(i2d_DHparams,(bp), \
-               (unsigned char *)(x))
-#endif
+#define d2i_DHparams_bio(bp,x) ASN1_d2i_bio_of(DH,DH_new,d2i_DHparams,bp,x)
+#define i2d_DHparams_bio(bp,x) ASN1_i2d_bio_of_const(DH,i2d_DHparams,bp,x)
 
 const DH_METHOD *DH_OpenSSL(void);
 
@@ -178,6 +187,7 @@ DH *        DH_generate_parameters(int prime_len,int generator,
 int    DH_generate_parameters_ex(DH *dh, int prime_len,int generator, BN_GENCB *cb);
 
 int    DH_check(const DH *dh,int *codes);
+int    DH_check_pub_key(const DH *dh,const BIGNUM *pub_key, int *codes);
 int    DH_generate_key(DH *dh);
 int    DH_compute_key(unsigned char *key,const BIGNUM *pub_key,DH *dh);
 DH *   d2i_DHparams(DH **a,const unsigned char **pp, long length);
@@ -200,16 +210,18 @@ void ERR_load_DH_strings(void);
 /* Error codes for the DH functions. */
 
 /* Function codes. */
+#define DH_F_COMPUTE_KEY                                102
 #define DH_F_DHPARAMS_PRINT                             100
 #define DH_F_DHPARAMS_PRINT_FP                          101
-#define DH_F_DH_COMPUTE_KEY                             102
-#define DH_F_DH_GENERATE_KEY                            103
-#define DH_F_DH_GENERATE_PARAMETERS                     104
+#define DH_F_DH_BUILTIN_GENPARAMS                       106
 #define DH_F_DH_NEW_METHOD                              105
+#define DH_F_GENERATE_KEY                               103
+#define DH_F_GENERATE_PARAMETERS                        104
 
 /* Reason codes. */
 #define DH_R_BAD_GENERATOR                              101
 #define DH_R_NO_PRIVATE_VALUE                           100
+#define DH_R_INVALID_PUBKEY                             102
 
 #ifdef  __cplusplus
 }