builtin/get-tar-commit-id: make hash size independent
To make this code independent of the hash size, verify that the length of the comment is equal to that of any supported hash algorithm. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -41,7 +41,8 @@ int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix)
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if (!skip_prefix(end, " comment=", &comment))
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return 1;
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len -= comment - content;
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if (len != GIT_SHA1_HEXSZ + 1)
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if (len < 1 || !(len % 2) ||
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hash_algo_by_length((len - 1) / 2) == GIT_HASH_UNKNOWN)
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return 1;
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if (write_in_full(1, comment, len) < 0)
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