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pki: Add a ssh_key_cmp() function.

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This commit is contained in:
Andreas Schneider
2011-09-18 22:04:03 +02:00
parent e799c0ce7d
commit 2c04994443
7 changed files with 209 additions and 0 deletions
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99
src/pki_gcrypt.c
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@@ -993,6 +993,105 @@ int pki_key_generate_dss(ssh_key key, int parameter){
return pki_key_generate(key, parameter, "dsa", SSH_KEYTYPE_DSS);
}
static int _bignum_cmp(const gcry_sexp_t s1,
const gcry_sexp_t s2,
const char *what)
{
gcry_sexp_t sexp;
bignum b1;
bignum b2;
sexp = gcry_sexp_find_token(s1, what, 0);
if (sexp == NULL) {
return 1;
}
b1 = gcry_sexp_nth_mpi(sexp, 1, GCRYMPI_FMT_USG);
gcry_sexp_release(sexp);
if (b1 == NULL) {
return 1;
}
sexp = gcry_sexp_find_token(s2, what, 0);
if (sexp == NULL) {
return 1;
}
b2 = gcry_sexp_nth_mpi(sexp, 1, GCRYMPI_FMT_USG);
gcry_sexp_release(sexp);
if (b2 == NULL) {
return 1;
}
if (bignum_cmp(b1, b2) != 0) {
return 1;
}
return 0;
}
int pki_key_compare(const ssh_key k1,
const ssh_key k2,
enum ssh_keycmp_e what)
{
switch (k1->type) {
case SSH_KEYTYPE_DSS:
if (_bignum_cmp(k1->dsa, k2->dsa, "p") != 0) {
return 1;
}
if (_bignum_cmp(k1->dsa, k2->dsa, "q") != 0) {
return 1;
}
if (_bignum_cmp(k1->dsa, k2->dsa, "g") != 0) {
return 1;
}
if (_bignum_cmp(k1->dsa, k2->dsa, "y") != 0) {
return 1;
}
if (what == SSH_KEY_CMP_PRIVATE) {
if (_bignum_cmp(k1->dsa, k2->dsa, "x") != 0) {
return 1;
}
}
break;
case SSH_KEYTYPE_RSA:
case SSH_KEYTYPE_RSA1:
if (_bignum_cmp(k1->rsa, k2->rsa, "e") != 0) {
return 1;
}
if (_bignum_cmp(k1->rsa, k2->rsa, "n") != 0) {
return 1;
}
if (what == SSH_KEY_CMP_PRIVATE) {
if (_bignum_cmp(k1->rsa, k2->rsa, "d") != 0) {
return 1;
}
if (_bignum_cmp(k1->rsa, k2->rsa, "p") != 0) {
return 1;
}
if (_bignum_cmp(k1->rsa, k2->rsa, "q") != 0) {
return 1;
}
if (_bignum_cmp(k1->rsa, k2->rsa, "u") != 0) {
return 1;
}
}
break;
case SSH_KEYTYPE_ECDSA:
case SSH_KEYTYPE_UNKNOWN:
return 1;
}
return 0;
}
ssh_string pki_publickey_to_blob(const ssh_key key)
{
ssh_buffer buffer;