libansilove

commit 02527f85788b3bfd37ed591d82facc549be1935f
parent 718d171fa9410db5569627308165b2aa8e1df4eb
Author: Frederic Cambus <fred@statdns.com>
Date:   Wed, 24 Oct 2018 15:34:48 +0200

Add format validation checks for ADF and IDF loaders

Diffstat:
M
src/loaders/artworx.c
 | 
5
+++++
M
src/loaders/icedraw.c
 | 
5
+++++

2 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/src/loaders/artworx.c b/src/loaders/artworx.c
@@ -22,6 +22,11 @@ int ansilove_artworx(struct ansilove_ctx *ctx, struct ansilove_options *options)
 		return -1;
 	}
 
+	if (ctx->length < ADF_HEADER_LENGTH) {
+		ctx->error = ANSILOVE_FORMAT_ERROR;
+		return -1;
+	}
+
 	// libgd image pointers
 	gdImagePtr canvas;
 
diff --git a/src/loaders/icedraw.c b/src/loaders/icedraw.c
@@ -22,6 +22,11 @@ int ansilove_icedraw(struct ansilove_ctx *ctx, struct ansilove_options *options)
 		return -1;
 	}
 
+	if (ctx->length < IDF_HEADER_LENGTH) {
+		ctx->error = ANSILOVE_FORMAT_ERROR;
+		return -1;
+	}
+
 	// extract relevant part of the IDF header, 16-bit endian unsigned short
 	uint32_t x2 = (ctx->buffer[9] << 8) + ctx->buffer[8];