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Fix hash computation when importing NARs greater than 4 GiB
This caused "nix-store --import" to compute an incorrect hash on NARs that don't fit in an unsigned int. The import would succeed, but "nix-store --verify-path" or subsequent exports would detect an incorrect hash. A deeper issue is that the export/import format does not contain a hash, so we can't detect such issues early. Also, I learned that -Wall does not warn about this.
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@ -224,7 +224,7 @@ static void start(HashType ht, Ctx & ctx)
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static void update(HashType ht, Ctx & ctx,
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const unsigned char * bytes, unsigned int len)
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const unsigned char * bytes, size_t len)
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{
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if (ht == htMD5) MD5_Update(&ctx.md5, bytes, len);
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else if (ht == htSHA1) SHA1_Update(&ctx.sha1, bytes, len);
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