X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=crypto%2Fhash.c;fp=crypto%2Fhash.c;h=c045de678154f45b13a5a5099635e284a0f09be1;hb=66bc25938679f1d6a1d1200f329093d82a5e99b4;hp=0000000000000000000000000000000000000000;hpb=a52ee0733f420ca20224049260d6fc5cf7d8f621;p=zpackage

diff --git a/crypto/hash.c b/crypto/hash.c
new file mode 100644
index 0000000..c045de6
--- /dev/null
+++ b/crypto/hash.c
@@ -0,0 +1,108 @@
+#define _POSIX_C_SOURCE 200809L
+
+#include "tlse.h"
+
+void tls_destroy_hash(struct TLSContext *context) {
+	if (context) {
+		context->hs_index = -1;
+	}
+	return;
+}
+
+static void create_hash(struct TLSContext *context) {
+	int index;
+
+	if (!context) {
+		return;
+	}
+
+	int hash_size = tls_mac_length(context);
+
+	if (hash_size == TLS_SHA384_MAC_SIZE) {
+		index = find_hash("sha384");
+	} else {
+		index = find_hash("sha256");
+	}
+	context->hs_index = index;
+	context->handshake_init = hash_descriptor[index].init;
+	context->handshake_process = hash_descriptor[index].process;
+	context->handshake_done = hash_descriptor[index].done;
+
+	context->handshake_init(&context->hs_hash);
+	context->hs_created = 1;
+}
+
+int tls_update_hash(struct TLSContext *context, const unsigned char *in,
+		unsigned int len) {
+	if (!context) {
+		return 0;
+	}
+
+	if (!len) {
+		return 0;
+	}
+
+	if (!context->hs_created) {
+		create_hash(context);
+	}
+
+	context->handshake_process(&context->hs_hash, in, len);
+
+	if (context->request_client_certificate) {
+		tls_buffer_append(&context->cached_handshake, in, len);
+	}
+	return 0;
+}
+
+int tls_done_hash(struct TLSContext *context, unsigned char *hout) {
+	if (!context) {
+		return 0;
+	}
+
+	if (!context->hs_created) {
+		return 0;
+	}
+
+	if (hout) {
+		context->handshake_done(&context->hs_hash, hout);
+	}
+	/* TODO zero memory? */
+	context->hs_created = 0;
+
+	tls_buffer_free(&context->cached_handshake);
+	return tls_mac_length(context);
+}
+
+int tls_get_hash_idx(struct TLSContext *context) {
+	if (!context) {
+		return -1;
+	}
+
+	switch (tls_mac_length(context)) {
+		case TLS_SHA256_MAC_SIZE:
+			return find_hash("sha256");
+		case TLS_SHA384_MAC_SIZE:
+			return find_hash("sha384");
+		case TLS_SHA1_MAC_SIZE:
+			return find_hash("sha1");
+	}
+	return -1;
+}
+
+int tls_get_hash(struct TLSContext *context, unsigned char *hout) {
+	hash_state prec;
+
+	if (!context) {
+		return 0;
+	}
+
+	if (!context->hs_created) {
+		return 0;
+	}
+
+	prec = context->hs_hash;
+
+	context->handshake_done(&prec, hout);
+
+	return tls_mac_length(context);
+}