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authorDamien Miller <djm@mindrot.org>2013-12-29 17:47:50 +1100
committerDamien Miller <djm@mindrot.org>2013-12-29 17:47:50 +1100
commit3e19295c3a253c8dc8660cf45baad7f45fccb969 (patch)
treee4c9f61c8391f3bce679cfa60f24c7c1c014cc02 /ssh-rsa.c
parent137977180be6254639e2c90245763e6965f8d815 (diff)
- djm@cvs.openbsd.org 2013/12/27 22:30:17
[ssh-dss.c ssh-ecdsa.c ssh-rsa.c] make the original RSA and DSA signing/verification code look more like the ECDSA/Ed25519 ones: use key_type_plain() when checking the key type rather than tediously listing all variants, use __func__ for debug/ error messages
Diffstat (limited to 'ssh-rsa.c')
-rw-r--r--ssh-rsa.c39
1 files changed, 21 insertions, 18 deletions
diff --git a/ssh-rsa.c b/ssh-rsa.c
index 30f96abc..782c8557 100644
--- a/ssh-rsa.c
+++ b/ssh-rsa.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssh-rsa.c,v 1.46 2013/05/17 00:13:14 djm Exp $ */
+/* $OpenBSD: ssh-rsa.c,v 1.47 2013/12/27 22:30:17 djm Exp $ */
/*
* Copyright (c) 2000, 2003 Markus Friedl <markus@openbsd.org>
*
@@ -47,14 +47,15 @@ ssh_rsa_sign(const Key *key, u_char **sigp, u_int *lenp,
int ok, nid;
Buffer b;
- if (key == NULL || key->rsa == NULL || (key->type != KEY_RSA &&
- key->type != KEY_RSA_CERT && key->type != KEY_RSA_CERT_V00)) {
- error("ssh_rsa_sign: no RSA key");
+ if (key == NULL || key_type_plain(key->type) != KEY_RSA ||
+ key->rsa == NULL) {
+ error("%s: no RSA key", __func__);
return -1;
}
+
nid = (datafellows & SSH_BUG_RSASIGMD5) ? NID_md5 : NID_sha1;
if ((evp_md = EVP_get_digestbynid(nid)) == NULL) {
- error("ssh_rsa_sign: EVP_get_digestbynid %d failed", nid);
+ error("%s: EVP_get_digestbynid %d failed", __func__, nid);
return -1;
}
EVP_DigestInit(&md, evp_md);
@@ -70,7 +71,7 @@ ssh_rsa_sign(const Key *key, u_char **sigp, u_int *lenp,
if (ok != 1) {
int ecode = ERR_get_error();
- error("ssh_rsa_sign: RSA_sign failed: %s",
+ error("%s: RSA_sign failed: %s", __func__,
ERR_error_string(ecode, NULL));
free(sig);
return -1;
@@ -81,7 +82,7 @@ ssh_rsa_sign(const Key *key, u_char **sigp, u_int *lenp,
memmove(sig + diff, sig, len);
memset(sig, 0, diff);
} else if (len > slen) {
- error("ssh_rsa_sign: slen %u slen2 %u", slen, len);
+ error("%s: slen %u slen2 %u", __func__, slen, len);
free(sig);
return -1;
}
@@ -115,21 +116,23 @@ ssh_rsa_verify(const Key *key, const u_char *signature, u_int signaturelen,
u_int len, dlen, modlen;
int rlen, ret, nid;
- if (key == NULL || key->rsa == NULL || (key->type != KEY_RSA &&
- key->type != KEY_RSA_CERT && key->type != KEY_RSA_CERT_V00)) {
- error("ssh_rsa_verify: no RSA key");
+ if (key == NULL || key_type_plain(key->type) != KEY_RSA ||
+ key->rsa == NULL) {
+ error("%s: no RSA key", __func__);
return -1;
}
+
if (BN_num_bits(key->rsa->n) < SSH_RSA_MINIMUM_MODULUS_SIZE) {
- error("ssh_rsa_verify: RSA modulus too small: %d < minimum %d bits",
- BN_num_bits(key->rsa->n), SSH_RSA_MINIMUM_MODULUS_SIZE);
+ error("%s: RSA modulus too small: %d < minimum %d bits",
+ __func__, BN_num_bits(key->rsa->n),
+ SSH_RSA_MINIMUM_MODULUS_SIZE);
return -1;
}
buffer_init(&b);
buffer_append(&b, signature, signaturelen);
ktype = buffer_get_cstring(&b, NULL);
if (strcmp("ssh-rsa", ktype) != 0) {
- error("ssh_rsa_verify: cannot handle type %s", ktype);
+ error("%s: cannot handle type %s", __func__, ktype);
buffer_free(&b);
free(ktype);
return -1;
@@ -139,19 +142,19 @@ ssh_rsa_verify(const Key *key, const u_char *signature, u_int signaturelen,
rlen = buffer_len(&b);
buffer_free(&b);
if (rlen != 0) {
- error("ssh_rsa_verify: remaining bytes in signature %d", rlen);
+ error("%s: remaining bytes in signature %d", __func__, rlen);
free(sigblob);
return -1;
}
/* RSA_verify expects a signature of RSA_size */
modlen = RSA_size(key->rsa);
if (len > modlen) {
- error("ssh_rsa_verify: len %u > modlen %u", len, modlen);
+ error("%s: len %u > modlen %u", __func__, len, modlen);
free(sigblob);
return -1;
} else if (len < modlen) {
u_int diff = modlen - len;
- debug("ssh_rsa_verify: add padding: modlen %u > len %u",
+ debug("%s: add padding: modlen %u > len %u", __func__,
modlen, len);
sigblob = xrealloc(sigblob, 1, modlen);
memmove(sigblob + diff, sigblob, len);
@@ -160,7 +163,7 @@ ssh_rsa_verify(const Key *key, const u_char *signature, u_int signaturelen,
}
nid = (datafellows & SSH_BUG_RSASIGMD5) ? NID_md5 : NID_sha1;
if ((evp_md = EVP_get_digestbynid(nid)) == NULL) {
- error("ssh_rsa_verify: EVP_get_digestbynid %d failed", nid);
+ error("%s: EVP_get_digestbynid %d failed", __func__, nid);
free(sigblob);
return -1;
}
@@ -172,7 +175,7 @@ ssh_rsa_verify(const Key *key, const u_char *signature, u_int signaturelen,
memset(digest, 'd', sizeof(digest));
memset(sigblob, 's', len);
free(sigblob);
- debug("ssh_rsa_verify: signature %scorrect", (ret==0) ? "in" : "");
+ debug("%s: signature %scorrect", __func__, (ret == 0) ? "in" : "");
return ret;
}