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62 lines
1.7 KiB
62 lines
1.7 KiB
#include "cache.h" |
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#include "pack.h" |
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static int verify_packfile(struct packed_git *p) |
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{ |
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unsigned long index_size = p->index_size; |
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void *index_base = p->index_base; |
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SHA_CTX ctx; |
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unsigned char sha1[20]; |
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unsigned long pack_size = p->pack_size; |
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void *pack_base; |
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struct pack_header *hdr; |
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int nr_objects; |
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hdr = p->pack_base; |
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if (hdr->hdr_signature != htonl(PACK_SIGNATURE)) |
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return error("Packfile signature mismatch", p->pack_name); |
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if (hdr->hdr_version != htonl(PACK_VERSION)) |
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return error("Packfile version %d different from ours %d", |
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ntohl(hdr->hdr_version), PACK_VERSION); |
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nr_objects = ntohl(hdr->hdr_entries); |
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if (num_packed_objects(p) != nr_objects) |
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return error("Packfile claims to have %d objects, " |
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"while idx size expects %d", nr_objects, |
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num_packed_objects(p)); |
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SHA1_Init(&ctx); |
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pack_base = p->pack_base; |
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SHA1_Update(&ctx, pack_base, pack_size - 20); |
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SHA1_Final(sha1, &ctx); |
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if (memcmp(sha1, index_base + index_size - 40, 20)) |
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return error("Packfile %s SHA1 mismatch with idx", |
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p->pack_name); |
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if (memcmp(sha1, pack_base + pack_size - 20, 20)) |
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return error("Packfile %s SHA1 mismatch with itself", |
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p->pack_name); |
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return 0; |
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} |
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int verify_pack(struct packed_git *p) |
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{ |
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unsigned long index_size = p->index_size; |
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void *index_base = p->index_base; |
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SHA_CTX ctx; |
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unsigned char sha1[20]; |
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int ret; |
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/* Verify SHA1 sum of the index file */ |
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SHA1_Init(&ctx); |
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SHA1_Update(&ctx, index_base, index_size - 20); |
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SHA1_Final(sha1, &ctx); |
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if (memcmp(sha1, index_base + index_size - 20, 20)) |
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return error("Packfile index for %s SHA1 mismatch", |
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p->pack_name); |
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/* Verify pack file */ |
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use_packed_git(p); |
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ret = verify_packfile(p); |
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unuse_packed_git(p); |
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return ret; |
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}
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