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pkcs1 encoder supports subjectPublicKeyInfo encoding

This commit is contained in:
Martin Willi 2009-08-27 13:07:34 +02:00
parent fb70fc24d3
commit 09fe3c7e4c
1 changed files with 71 additions and 65 deletions
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136
src/libstrongswan/plugins/pkcs1/pkcs1_encoder.c
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@ -19,71 +19,6 @@
#include <asn1/asn1.h>
#include <asn1/oid.h>
/**
* Build the SHA1 hash of pubkey(info) ASN.1 data
*/
static bool hash_pubkey(chunk_t pubkey, chunk_t *hash)
{
hasher_t *hasher;
hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
if (hasher == NULL)
{
chunk_free(&pubkey);
DBG1("SHA1 hash algorithm not supported, fingerprinting failed");
return FALSE;
}
hasher->allocate_hash(hasher, pubkey, hash);
hasher->destroy(hasher);
chunk_free(&pubkey);
return TRUE;
}
/**
* build the fingerprint of the subjectPublicKeyInfo object
*/
static bool build_info_sha1(chunk_t *encoding, va_list args)
{
chunk_t n, e, pubkey;
if (key_encoding_args(args, KEY_PART_RSA_MODULUS, &n,
KEY_PART_RSA_PUB_EXP, &e, KEY_PART_END))
{
pubkey = asn1_wrap(ASN1_SEQUENCE, "cm",
asn1_algorithmIdentifier(OID_RSA_ENCRYPTION),
asn1_bitstring("m",
asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_wrap(ASN1_INTEGER, "c", n),
asn1_wrap(ASN1_INTEGER, "c", e))));
}
else
{
return FALSE;
}
return hash_pubkey(pubkey, encoding);
}
/**
* build the fingerprint of the subjectPublicKey object
*/
static bool build_sha1(chunk_t *encoding, va_list args)
{
chunk_t n, e, pubkey;
if (key_encoding_args(args, KEY_PART_RSA_MODULUS, &n,
KEY_PART_RSA_PUB_EXP, &e, KEY_PART_END))
{
pubkey = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_wrap(ASN1_INTEGER, "c", n),
asn1_wrap(ASN1_INTEGER, "c", e));
}
else
{
return FALSE;
}
return hash_pubkey(pubkey, encoding);
}
/**
* Encode a public key in PKCS#1/ASN.1 DER
*/
@ -102,6 +37,27 @@ bool build_pub(chunk_t *encoding, va_list args)
return FALSE;
}
/**
* Encode a public key in PKCS#1/ASN.1 DER, contained in subjectPublicKeyInfo
*/
bool build_pub_info(chunk_t *encoding, va_list args)
{
chunk_t n, e;
if (key_encoding_args(args, KEY_PART_RSA_MODULUS, &n,
KEY_PART_RSA_PUB_EXP, &e, KEY_PART_END))
{
*encoding = asn1_wrap(ASN1_SEQUENCE, "cm",
asn1_algorithmIdentifier(OID_RSA_ENCRYPTION),
asn1_bitstring("m",
asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_wrap(ASN1_INTEGER, "c", n),
asn1_wrap(ASN1_INTEGER, "c", e))));
return TRUE;
}
return FALSE;
}
/**
* Encode a private key in PKCS#1/ASN.1 DER
*/
@ -130,6 +86,54 @@ bool build_priv(chunk_t *encoding, va_list args)
return FALSE;
}
/**
* Build the SHA1 hash of pubkey(info) ASN.1 data
*/
static bool hash_pubkey(chunk_t pubkey, chunk_t *hash)
{
hasher_t *hasher;
hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
if (hasher == NULL)
{
chunk_free(&pubkey);
DBG1("SHA1 hash algorithm not supported, fingerprinting failed");
return FALSE;
}
hasher->allocate_hash(hasher, pubkey, hash);
hasher->destroy(hasher);
chunk_free(&pubkey);
return TRUE;
}
/**
* build the fingerprint of the subjectPublicKeyInfo object
*/
static bool build_info_sha1(chunk_t *encoding, va_list args)
{
chunk_t pubkey;
if (build_pub_info(&pubkey, args))
{
return hash_pubkey(pubkey, encoding);
}
return FALSE;
}
/**
* build the fingerprint of the subjectPublicKey object
*/
static bool build_sha1(chunk_t *encoding, va_list args)
{
chunk_t pubkey;
if (build_pub(&pubkey, args))
{
return hash_pubkey(pubkey, encoding);
}
return FALSE;
}
/**
* See header.
*/
@ -144,6 +148,8 @@ bool pkcs1_encoder_encode(key_encoding_type_t type, chunk_t *encoding,
return build_sha1(encoding, args);
case KEY_PUB_ASN1_DER:
return build_pub(encoding, args);
case KEY_PUB_SPKI_ASN1_DER:
return build_pub_info(encoding, args);
case KEY_PRIV_ASN1_DER:
return build_priv(encoding, args);
default: