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- starter work on asn1 with der de/encoder

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- RSA private and public key can load read key from ASN1 DER
- some other fixes here and there
This commit is contained in:
Martin Willi
2006-03-24 15:37:49 +00:00
parent dec598220b
commit 9c781c152a
35 changed files with 1858 additions and 249 deletions
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Source/charon/transforms/rsa/rsa_public_key.c
+33 -27
View File
@@ -27,16 +27,17 @@
#include <daemon.h>
#include <utils/allocator.h>
#include <transforms/hashers/hasher.h>
#include <asn1/der_decoder.h>
/*
* Since we don't have an ASN1 parser/generator,
* For simplicity,
* we use these predefined values for
* hash algorithm oids. These also contain
* hash algorithm OIDs. These also contain
* the length of the following hash.
* These values are also used in rsa_private_key.c.
*/
u_int8_t md2_oid[18] = {
u_int8_t md2_oid[] = {
0x30,0x20,0x30,0x0c,0x06,0x08,0x2a,0x86,
0x48,0x86,0xf7,0x0d,0x02,0x02,0x05,0x00,
0x04,0x10
@@ -92,6 +93,7 @@ struct private_rsa_public_key_t {
* Public modulus.
*/
mpz_t n;
/**
* Public exponent.
*/
@@ -122,7 +124,17 @@ struct private_rsa_public_key_t {
};
/**
* Implementation of private_rsa_public_key_t.rsadp and private_rsa_public_key_t.rsavp1
* Rules for de-/encoding of a public key from/in ASN1
*/
static asn1_rule_t rsa_public_key_rules[] = {
{ASN1_SEQUENCE, 0, 0, 0},
{ ASN1_INTEGER, ASN1_MPZ, offsetof(private_rsa_public_key_t, n), 0},
{ ASN1_INTEGER, ASN1_MPZ, offsetof(private_rsa_public_key_t, e), 0},
{ASN1_END, 0, 0, 0},
};
/**
* Implementation of private_rsa_public_key_t.rsaep and private_rsa_public_key_t.rsavp1
*/
static chunk_t rsaep(private_rsa_public_key_t *this, chunk_t data)
{
@@ -146,7 +158,7 @@ static chunk_t rsaep(private_rsa_public_key_t *this, chunk_t data)
}
/**
* Implementation of rsa_public_key.verify_emsa_signature.
* Implementation of rsa_public_key.verify_emsa_pkcs1_signature.
*/
static status_t verify_emsa_pkcs1_signature(private_rsa_public_key_t *this, chunk_t data, chunk_t signature)
{
@@ -278,25 +290,20 @@ static status_t verify_emsa_pkcs1_signature(private_rsa_public_key_t *this, chun
*/
static status_t set_key(private_rsa_public_key_t *this, chunk_t key)
{
chunk_t n, e;
der_decoder_t *dd;
status_t status;
n.len = key.len/2;
n.ptr = key.ptr;
e.len = n.len;
e.ptr = key.ptr + n.len;
dd = der_decoder_create(rsa_public_key_rules);
mpz_init(this->n);
mpz_init(this->e);
mpz_import(this->n, n.len, 1, 1, 1, 0, n.ptr);
mpz_import(this->e, n.len, 1, 1, 1, 0, e.ptr);
this->k = n.len;
this->is_key_set = TRUE;
return SUCCESS;
}
status = dd->decode(dd, key, this);
if (status == SUCCESS)
{
this->is_key_set = TRUE;
this->k = mpz_sizeinbase(this->n, 2) / 8;
}
dd->destroy(dd);
return status;
}
/**
@@ -347,11 +354,8 @@ static status_t save_key(private_rsa_public_key_t *this, char *file)
*/
static void destroy(private_rsa_public_key_t *this)
{
if (this->is_key_set)
{
mpz_clear(this->n);
mpz_clear(this->e);
}
mpz_clear(this->n);
mpz_clear(this->e);
allocator_free(this);
}
@@ -374,6 +378,8 @@ rsa_public_key_t *rsa_public_key_create()
this->rsaep = rsaep;
this->rsavp1 = rsaep; /* same algorithm */
mpz_init(this->n);
mpz_init(this->e);
this->is_key_set = FALSE;
return &(this->public);