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src/secp256k1/src/ecdsa_impl.h
| Show First 20 Lines • Show All 75 Lines • ▼ Show 20 Lines | static int secp256k1_der_read_len(const unsigned char **sigp, const unsigned char *sigend) { | ||||
| } | } | ||||
| if ((size_t)lenleft > sizeof(size_t)) { | if ((size_t)lenleft > sizeof(size_t)) { | ||||
| /* The resulting length would exceed the range of a size_t, so | /* The resulting length would exceed the range of a size_t, so | ||||
| * certainly longer than the passed array size. | * certainly longer than the passed array size. | ||||
| */ | */ | ||||
| return -1; | return -1; | ||||
| } | } | ||||
| while (lenleft > 0) { | while (lenleft > 0) { | ||||
| if ((ret >> ((sizeof(size_t) - 1) * 8)) != 0) { | |||||
| } | |||||
| ret = (ret << 8) | **sigp; | ret = (ret << 8) | **sigp; | ||||
| if (ret + lenleft > (size_t)(sigend - *sigp)) { | if (ret + lenleft > (size_t)(sigend - *sigp)) { | ||||
| /* Result exceeds the length of the passed array. */ | /* Result exceeds the length of the passed array. */ | ||||
| return -1; | return -1; | ||||
| } | } | ||||
| (*sigp)++; | (*sigp)++; | ||||
| lenleft--; | lenleft--; | ||||
| } | } | ||||
| ▲ Show 20 Lines • Show All 222 Lines • Show Last 20 Lines | |||||