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ada776c84c
* Modify php_hash_ops to contain the algorithm name and serialize and unserialize methods. * Implement __serialize and __unserialize magic methods on HashContext. Note that serialized HashContexts are not necessarily portable between PHP versions or from architecture to architecture. (Most are, though Keccak and slow SHA3s are not.) An exception is thrown when an unsupported serialization is attempted. Because of security concerns, HASH_HMAC contexts are not currently serializable; attempting to serialize one throws an exception. Serialization exposes the state of HashContext memory, so ensure that memory is zeroed before use by allocating it with a new php_hash_alloc_context function. Performance impact is negligible. Some hash internal states have logical pointers into a buffer, or sponge, that absorbs input provided in bytes rather than chunks. The unserialize functions for these hash functions must validate that the logical pointers are all within bounds, lest future hash operations cause out-of-bounds memory accesses. * Adler32, CRC32, FNV, joaat: simple state, no buffer positions * Gost, MD2, SHA3, Snefru, Tiger, Whirlpool: buffer positions must be validated * MD4, MD5, SHA1, SHA2, haval, ripemd: buffer positions encoded bitwise, forced to within bounds on use; no need to validate
46 lines
3.3 KiB
PHP
46 lines
3.3 KiB
PHP
--TEST--
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Hash: serialization errors
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--FILE--
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<?php
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// cannot unserialize onto an already-initialized object
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$ctx = hash_init("sha256");
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try {
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$ctx->__unserialize($ctx->__serialize());
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} catch (Exception $e) {
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echo $e->getMessage(), "\n";
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}
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// bad formats
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foreach ([
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"TzoxMToiSGFzaENvbnRleHQiOjA6e30=", // no contents
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"TzoxMToiSGFzaENvbnRleHQiOjU6e2k6MDtpOjE7aToxO2k6MDtpOjI7YTo4OntpOjA7aToxNzMyNTg0MTkzO2k6MTtpOi0yNzE3MzM4Nzk7aToyO2k6LTE3MzI1ODQxOTQ7aTozO2k6MjcxNzMzODc4O2k6NDtpOi0xMDA5NTg5Nzc2O2k6NTtpOjIwMDtpOjY7aTowO2k6NztzOjY0OiJJIGNhbid0IHJlbWVtYmVyIGFueXRoaW5nAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIjt9aTozO2k6MjtpOjQ7YTowOnt9fQ==", // algorithm is int
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"TzoxMToiSGFzaENvbnRleHQiOjU6e2k6MDtzOjQ6InNoYTEiO2k6MTtzOjA6IiI7aToyO2E6ODp7aTowO2k6MTczMjU4NDE5MztpOjE7aTotMjcxNzMzODc5O2k6MjtpOi0xNzMyNTg0MTk0O2k6MztpOjI3MTczMzg3ODtpOjQ7aTotMTAwOTU4OTc3NjtpOjU7aToyMDA7aTo2O2k6MDtpOjc7czo2NDoiSSBjYW4ndCByZW1lbWJlciBhbnl0aGluZwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACI7fWk6MztpOjI7aTo0O2E6MDp7fX0=", // flags are string
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"TzoxMToiSGFzaENvbnRleHQiOjU6e2k6MDtzOjQ6InNoYTEiO2k6MTtpOjE7aToyO2E6ODp7aTowO2k6MTczMjU4NDE5MztpOjE7aTotMjcxNzMzODc5O2k6MjtpOi0xNzMyNTg0MTk0O2k6MztpOjI3MTczMzg3ODtpOjQ7aTotMTAwOTU4OTc3NjtpOjU7aToyMDA7aTo2O2k6MDtpOjc7czo2NDoiSSBjYW4ndCByZW1lbWJlciBhbnl0aGluZwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACI7fWk6MztpOjI7aTo0O2E6MDp7fX0=", // flags indicate HASH_HMAC
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"TzoxMToiSGFzaENvbnRleHQiOjU6e2k6MDtzOjQ6InNoYTEiO2k6MTtpOjI7aToyO3M6MTA6ImFiY2RlZmdoaWoiO2k6MztpOjI7aTo0O2E6MDp7fX0=", // serialization format wrong
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"TzoxMToiSGFzaENvbnRleHQiOjU6e2k6MDtzOjQ6InNoYTEiO2k6MTtpOjA7aToyO2E6ODp7aTowO2k6MTczMjU4NDE5MztpOjE7aTotMjcxNzMzODc5O2k6MjtpOi0xNzMyNTg0MTk0O2k6MztpOjI3MTczMzg3ODtpOjQ7aTotMTAwOTU4OTc3NjtpOjU7aToyMDA7aTo2O3M6MDoiIjtpOjc7czo2NDoiSSBjYW4ndCByZW1lbWJlciBhbnl0aGluZwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACI7fWk6MztpOjI7aTo0O2E6MDp7fX0=", // serialization internals wrong
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"TzoxMToiSGFzaENvbnRleHQiOjU6e2k6MDtzOjQ6InNoYTEiO2k6MTtpOjA7aToyO2E6ODp7aTowO2k6MTczMjU4NDE5MztpOjE7aTotMjcxNzMzODc5O2k6MjtpOi0xNzMyNTg0MTk0O2k6MztpOjI3MTczMzg3ODtpOjQ7aTotMTAwOTU4OTc3NjtpOjU7aToyMDA7aTo2O2k6MDtpOjc7czo2NDoiSSBjYW4ndCByZW1lbWJlciBhbnl0aGluZwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACI7fWk6MztpOjA7aTo0O2E6MDp7fX0=", // bad magic number
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"TzoxMToiSGFzaENvbnRleHQiOjU6e2k6MDtzOjQ6Inh4eDEiO2k6MTtpOjA7aToyO2E6ODp7aTowO2k6MTczMjU4NDE5MztpOjE7aTotMjcxNzMzODc5O2k6MjtpOi0xNzMyNTg0MTk0O2k6MztpOjI3MTczMzg3ODtpOjQ7aTotMTAwOTU4OTc3NjtpOjU7aToyMDA7aTo2O2k6MDtpOjc7czo2NDoiSSBjYW4ndCByZW1lbWJlciBhbnl0aGluZwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACI7fWk6MztpOjI7aTo0O2E6MDp7fX0=" // bad algorithm
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] as $serial) {
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try {
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$ctx = unserialize(base64_decode($serial));
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echo "Unexpected success\n";
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} catch (Exception $e) {
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echo $e->getMessage(), "\n";
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}
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}
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echo "Done\n";
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?>
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--EXPECT--
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HashContext::__unserialize called on initialized object
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Incomplete or ill-formed serialization data
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Incomplete or ill-formed serialization data
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Incomplete or ill-formed serialization data
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HashContext with HASH_HMAC option cannot be serialized
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Incomplete or ill-formed serialization data ("sha1" code -1)
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Incomplete or ill-formed serialization data ("sha1" code -1024)
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Incomplete or ill-formed serialization data ("sha1" code -1)
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Unknown hash algorithm
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Done
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