Commit fd3dbc1d authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

Add CRYPTO_gcm128_tag() function to retrieve the tag.

parent d45087c6

crypto/modes/gcm128.c

+6 −0
Original line number Diff line number Diff line
@@ -1337,6 +1337,12 @@ int CRYPTO_gcm128_finish(GCM128_CONTEXT *ctx,const unsigned char *tag, 
		return -1;

}



void CRYPTO_gcm128_tag(GCM128_CONTEXT *ctx, unsigned char *tag, size_t len)

{

	CRYPTO_gcm128_finish(ctx, NULL, 0);

	memcpy(tag, ctx->Xi.c, len);

}



GCM128_CONTEXT *CRYPTO_gcm128_new(void *key, block128_f block)

{

	GCM128_CONTEXT *ret;

crypto/modes/modes.h

+1 −0
Original line number Diff line number Diff line
@@ -102,4 +102,5 @@ void CRYPTO_gcm128_decrypt_ctr32(GCM128_CONTEXT *ctx, 
			size_t len, ctr128_f stream);

int  CRYPTO_gcm128_finish(GCM128_CONTEXT *ctx,const unsigned char *tag,

			size_t len);

void  CRYPTO_gcm128_tag(GCM128_CONTEXT *ctx, unsigned char *tag, size_t len);

void CRYPTO_gcm128_release(GCM128_CONTEXT *ctx);