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[crypto] initial support for ecdh-sha2-nistp256

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Works with openssl
Still requires work for libgcrypt and other modes
This commit is contained in:
Aris Adamantiadis
2011-06-13 13:46:34 +02:00
parent 3b72bf0880
commit c5a998f47a
18 changed files with 638 additions and 164 deletions
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63
src/libgcrypt.c
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@@ -31,6 +31,10 @@
#ifdef HAVE_LIBGCRYPT
#include <gcrypt.h>
struct ssh_mac_ctx_struct {
enum ssh_mac_e mac_type;
gcry_md_hd_t ctx;
};
static int alloc_key(struct crypto_struct *cipher) {
cipher->key = malloc(cipher->keylen);
@@ -62,6 +66,10 @@ void sha1(unsigned char *digest, int len, unsigned char *hash) {
gcry_md_hash_buffer(GCRY_MD_SHA1, hash, digest, len);
}
void sha256(unsigned char *digest, int len, unsigned char *hash){
gcry_md_hash_buffer(GCRY_MD_SHA256, hash, digest, len);
}
MD5CTX md5_init(void) {
MD5CTX c = NULL;
gcry_md_open(&c, GCRY_MD_MD5, 0);
@@ -79,14 +87,63 @@ void md5_final(unsigned char *md, MD5CTX c) {
gcry_md_close(c);
}
HMACCTX hmac_init(const void *key, int len, int type) {
ssh_mac_ctx ssh_mac_ctx_init(enum ssh_mac_e type){
ssh_mac_ctx ctx=malloc(sizeof(struct ssh_mac_ctx_struct));
ctx->mac_type=type;
switch(type){
case SSH_MAC_SHA1:
gcry_md_open(&ctx->ctx, GCRY_MD_SHA1, 0);
break;
case SSH_MAC_SHA256:
gcry_md_open(&ctx->ctx, GCRY_MD_SHA256, 0);
break;
case SSH_MAC_SHA384:
gcry_md_open(&ctx->ctx, GCRY_MD_SHA384, 0);
break;
case SSH_MAC_SHA512:
gcry_md_open(&ctx->ctx, GCRY_MD_SHA512, 0);
break;
default:
SAFE_FREE(ctx);
return NULL;
}
return ctx;
}
void ssh_mac_update(ssh_mac_ctx ctx, const void *data, unsigned long len) {
gcry_md_write(ctx->ctx,data,len);
}
void ssh_mac_final(unsigned char *md, ssh_mac_ctx ctx) {
size_t len;
switch(ctx->mac_type){
case SSH_MAC_SHA1:
len=SHA_DIGEST_LEN;
break;
case SSH_MAC_SHA256:
len=SHA256_DIGEST_LENGTH;
break;
case SSH_MAC_SHA384:
len=SHA384_DIGEST_LENGTH;
break;
case SSH_MAC_SHA512:
len=SHA512_DIGEST_LENGTH;
break;
}
gcry_md_final(ctx->ctx);
memcpy(md, gcry_md_read(ctx->ctx, 0), len);
gcry_md_close(ctx->ctx);
SAFE_FREE(ctx);
}
HMACCTX hmac_init(const void *key, int len, enum ssh_hmac_e type) {
HMACCTX c = NULL;
switch(type) {
case HMAC_SHA1:
case SSH_HMAC_SHA1:
gcry_md_open(&c, GCRY_MD_SHA1, GCRY_MD_FLAG_HMAC);
break;
case HMAC_MD5:
case SSH_HMAC_MD5:
gcry_md_open(&c, GCRY_MD_MD5, GCRY_MD_FLAG_HMAC);
break;
default: