first pass

[PuTTY.git] / sshrsa.c

diff --git a/sshrsa.c b/sshrsa.c
index 3adccfbef1d43eb9fc0787b7e7537ca26d60488a..e565a64ac791ff7be104a17f27814f4962f32fc7 100644 (file)
--- a/sshrsa.c
+++ b/sshrsa.c
@@ -565,7 +565,8 @@ static Bignum getmp(const char **data, int *datalen)
 
 static void rsa2_freekey(void *key);   /* forward reference */
 
-static void *rsa2_newkey(const char *data, int len)
+static void *rsa2_newkey(const struct ssh_signkey *self,
+                         const char *data, int len)
 {
     const char *p;
     int slen;
@@ -685,13 +686,14 @@ static unsigned char *rsa2_private_blob(void *key, int *len)
     return blob;
 }
 
-static void *rsa2_createkey(const unsigned char *pub_blob, int pub_len,
+static void *rsa2_createkey(const struct ssh_signkey *self,
+                            const unsigned char *pub_blob, int pub_len,
                            const unsigned char *priv_blob, int priv_len)
 {
     struct RSAKey *rsa;
     const char *pb = (const char *) priv_blob;
 
-    rsa = rsa2_newkey((char *) pub_blob, pub_len);
+    rsa = rsa2_newkey(self, (char *) pub_blob, pub_len);
     rsa->private_exponent = getmp(&pb, &priv_len);
     rsa->p = getmp(&pb, &priv_len);
     rsa->q = getmp(&pb, &priv_len);
@@ -705,7 +707,8 @@ static void *rsa2_createkey(const unsigned char *pub_blob, int pub_len,
     return rsa;
 }
 
-static void *rsa2_openssh_createkey(const unsigned char **blob, int *len)
+static void *rsa2_openssh_createkey(const struct ssh_signkey *self,
+                                    const unsigned char **blob, int *len)
 {
     const char **b = (const char **) blob;
     struct RSAKey *rsa;
@@ -763,53 +766,21 @@ static int rsa2_openssh_fmtkey(void *key, unsigned char *blob, int len)
     return bloblen;
 }
 
-static int rsa2_pubkey_bits(const void *blob, int len)
+static int rsa2_pubkey_bits(const struct ssh_signkey *self,
+                            const void *blob, int len)
 {
     struct RSAKey *rsa;
     int ret;
 
-    rsa = rsa2_newkey((const char *) blob, len);
+    rsa = rsa2_newkey(self, (const char *) blob, len);
+    if (!rsa)
+       return -1;
     ret = bignum_bitcount(rsa->modulus);
     rsa2_freekey(rsa);
 
     return ret;
 }
 
-static char *rsa2_fingerprint(void *key)
-{
-    struct RSAKey *rsa = (struct RSAKey *) key;
-    struct MD5Context md5c;
-    unsigned char digest[16], lenbuf[4];
-    char buffer[16 * 3 + 40];
-    char *ret;
-    int numlen, i;
-
-    MD5Init(&md5c);
-    MD5Update(&md5c, (unsigned char *)"\0\0\0\7ssh-rsa", 11);
-
-#define ADD_BIGNUM(bignum) \
-    numlen = (bignum_bitcount(bignum)+8)/8; \
-    PUT_32BIT(lenbuf, numlen); MD5Update(&md5c, lenbuf, 4); \
-    for (i = numlen; i-- ;) { \
-        unsigned char c = bignum_byte(bignum, i); \
-        MD5Update(&md5c, &c, 1); \
-    }
-    ADD_BIGNUM(rsa->exponent);
-    ADD_BIGNUM(rsa->modulus);
-#undef ADD_BIGNUM
-
-    MD5Final(digest, &md5c);
-
-    sprintf(buffer, "ssh-rsa %d ", bignum_bitcount(rsa->modulus));
-    for (i = 0; i < 16; i++)
-       sprintf(buffer + strlen(buffer), "%s%02x", i ? ":" : "",
-               digest[i]);
-    ret = snewn(strlen(buffer) + 1, char);
-    if (ret)
-       strcpy(ret, buffer);
-    return ret;
-}
-
 /*
  * This is the magic ASN.1/DER prefix that goes in the decoded
  * signature, between the string of FFs and the actual SHA hash
@@ -945,16 +916,16 @@ const struct ssh_signkey ssh_rsa = {
     rsa2_openssh_fmtkey,
     6 /* n,e,d,iqmp,q,p */,
     rsa2_pubkey_bits,
-    rsa2_fingerprint,
     rsa2_verifysig,
     rsa2_sign,
     "ssh-rsa",
-    "rsa2"
+    "rsa2",
+    NULL,
 };
 
 void *ssh_rsakex_newkey(char *data, int len)
 {
-    return rsa2_newkey(data, len);
+    return rsa2_newkey(&ssh_rsa, data, len);
 }
 
 void ssh_rsakex_freekey(void *key)
@@ -1089,11 +1060,11 @@ void ssh_rsakex_encrypt(const struct ssh_hash *h, unsigned char *in, int inlen,
 }
 
 static const struct ssh_kex ssh_rsa_kex_sha1 = {
-    "rsa1024-sha1", NULL, KEXTYPE_RSA, NULL, NULL, 0, 0, &ssh_sha1
+    "rsa1024-sha1", NULL, KEXTYPE_RSA, &ssh_sha1, NULL,
 };
 
 static const struct ssh_kex ssh_rsa_kex_sha256 = {
-    "rsa2048-sha256", NULL, KEXTYPE_RSA, NULL, NULL, 0, 0, &ssh_sha256
+    "rsa2048-sha256", NULL, KEXTYPE_RSA, &ssh_sha256, NULL,
 };
 
 static const struct ssh_kex *const rsa_kex_list[] = {