X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=rsa.c;h=3ce72b86fcdbbb3b609cf092943a7eb38f3614c3;hb=0fe7c7833057bdc63a40c27ac64e3bbda43658b7;hp=d5d80ff6664dbcb0e0a1d0a07960c67fb3bcbf92;hpb=934cb196c3928724c351045f25c740a830941e4a;p=secnet.git

diff --git a/rsa.c b/rsa.c
index d5d80ff..3ce72b8 100644
--- a/rsa.c
+++ b/rsa.c
@@ -45,6 +45,37 @@ struct rsacommon {
     uint8_t *hashbuf;
 };
 
+struct load_ctx {
+    void (*verror)(struct load_ctx *l,
+		   FILE *maybe_f, bool_t unsup,
+		   const char *message, va_list args);
+    bool_t (*postreadcheck)(struct load_ctx *l, FILE *f);
+    const char *what;
+    struct cloc *loc;
+    union {
+	struct {
+	    struct log_if *log;
+	} tryload;
+    } u;
+};
+
+FORMAT(printf,4,0)
+static void verror_tryload(struct load_ctx *l,
+			   FILE *maybe_f, bool_t unsup,
+			   const char *message, va_list args)
+{
+    int class=unsup ? M_DEBUG : M_ERR;
+    slilog_part(l->u.tryload.log,class,"%s: ",l->what);
+    vslilog(l->u.tryload.log,class,message,args);
+}
+
+static void verror_cfgfatal(struct load_ctx *l,
+			    FILE *maybe_f, bool_t unsup,
+			    const char *message, va_list args)
+{
+    vcfgfatal_maybefile(maybe_f,*l->loc,l->what,message,args);
+}
+
 struct rsapriv {
     closure_t cl;
     struct sigprivkey_if ops;
@@ -328,17 +359,14 @@ static list_t *rsapub_apply(closure_t *self, struct cloc loc, dict_t *context,
     return new_closure(&st->cl);
 }
 
-struct rsapriv_load_ctx {
-    void (*verror)(struct rsapriv_load_ctx *l,
-		   FILE *maybe_f, bool_t unsup,
-		   const char *message, va_list args);
-    bool_t (*postreadcheck)(struct rsapriv_load_ctx *l, FILE *f);
-    union {
-	struct {
-	    struct cloc loc;
-	} apply;
-    } u;
-};
+static void load_error(struct load_ctx *l, FILE *maybe_f,
+		       bool_t unsup, const char *fmt, ...)
+{
+    va_list al;
+    va_start(al,fmt);
+    l->verror(l,maybe_f,unsup,fmt,al);
+    va_end(al);
+}
 
 #define LDFATAL(...)      ({ load_error(l,0,0,__VA_ARGS__); goto error_out; })
 #define LDUNSUP(...)      ({ load_error(l,0,1,__VA_ARGS__); goto error_out; })
@@ -351,7 +379,7 @@ struct rsapriv_load_ctx {
 	keyfile_get_tmp;					\
     })
 
-static uint32_t keyfile_get_32(struct rsapriv_load_ctx *l, FILE *f)
+static uint32_t keyfile_get_32(struct load_ctx *l, FILE *f)
 {
     uint32_t r;
     r=fgetc(f)<<24;
@@ -361,7 +389,7 @@ static uint32_t keyfile_get_32(struct rsapriv_load_ctx *l, FILE *f)
     return r;
 }
 
-static uint16_t keyfile_get_16(struct rsapriv_load_ctx *l, FILE *f)
+static uint16_t keyfile_get_16(struct load_ctx *l, FILE *f)
 {
     uint16_t r;
     r=fgetc(f)<<8;
@@ -369,15 +397,6 @@ static uint16_t keyfile_get_16(struct rsapriv_load_ctx *l, FILE *f)
     return r;
 }
 
-static void load_error(struct rsapriv_load_ctx *l, FILE *maybe_f,
-		       bool_t unsup, const char *fmt, ...)
-{
-    va_list al;
-    va_start(al,fmt);
-    l->verror(l,maybe_f,unsup,fmt,al);
-    va_end(al);
-}
-
 static void rsapriv_dispose(void *sst)
 {
     struct rsapriv *st=sst;
@@ -389,7 +408,7 @@ static void rsapriv_dispose(void *sst)
     free(st);
 }
 
-static struct rsapriv *rsa_loadpriv_core(struct rsapriv_load_ctx *l,
+static struct rsapriv *rsa_loadpriv_core(struct load_ctx *l,
 					 FILE *f, struct cloc loc,
 					 bool_t do_validity_check)
 {
@@ -618,16 +637,50 @@ error_out:
     goto out;
 }
 
-static void verror_cfgfatal(struct rsapriv_load_ctx *l,
-			    FILE *maybe_f, bool_t unsup,
-			    const char *message, va_list args)
+static bool_t postreadcheck_tryload(struct load_ctx *l, FILE *f)
+{
+    assert(!ferror(f));
+    if (feof(f)) { load_error(l,0,0,"eof mid-integer"); return False; }
+    return True;
+}
+
+bool_t rsa1_loadpriv(const struct sigscheme_info *algo,
+		     struct buffer_if *privkeydata,
+		     struct sigprivkey_if **sigpriv_r,
+		     struct log_if *log, struct cloc loc)
 {
-    vcfgfatal_maybefile(maybe_f,l->u.apply.loc,"rsa-private",message,args);
+    FILE *f=0;
+    struct rsapriv *st=0;
+
+    f=fmemopen(privkeydata->start,privkeydata->size,"r");
+    if (!f) {
+	slilog(log,M_ERR,"failed to fmemopen private key file\n");
+	goto error_out;
+    }
+
+    struct load_ctx l[1];
+    l->what="rsa1priv load";
+    l->verror=verror_tryload;
+    l->postreadcheck=postreadcheck_tryload;
+    l->loc=&loc;
+    l->u.tryload.log=log;
+
+    st=rsa_loadpriv_core(l,f,loc,False);
+    if (!st) goto error_out;
+    goto out;
+
+ error_out:
+    if (st) { free(st); st=0; }
+ out:
+    if (f) fclose(f);
+    if (!st) return False;
+    *sigpriv_r=&st->ops;
+    return True;
 }
 
-static bool_t postreadcheck_apply(struct rsapriv_load_ctx *l, FILE *f)
+static bool_t postreadcheck_apply(struct load_ctx *l, FILE *f)
 {
-    cfgfile_postreadcheck(l->u.apply.loc,f);
+    cfgfile_postreadcheck(*l->loc,f);
     return True;
 }
 
@@ -638,11 +691,12 @@ static list_t *rsapriv_apply(closure_t *self, struct cloc loc, dict_t *context,
     item_t *i;
     cstring_t filename;
     FILE *f;
-    struct rsapriv_load_ctx l[1];
+    struct load_ctx l[1];
 
+    l->what="rsa-private";
     l->verror=verror_cfgfatal;
     l->postreadcheck=postreadcheck_apply;
-    l->u.apply.loc=loc;
+    l->loc=&loc;
 
     /* Argument is filename pointing to SSH1 private key file */
     i=list_elem(args,0);