[Solved] Base64 decoding – incorrect string length

Question

Are you using str[n]cpy? You can’t! Base64 encoded data can contain null characters, which C string processing functions interpret as end-of-string.

Use memcpy instead of str[n]cpy, memcmp instead of strcmp, etc. These functions require you to know your data size, but I believe that you do know it.

Also if you’re not very confident about C-style strings and such, there’s plenty of information to be found about the topic here.

Accepted Answer

Are you using str[n]cpy? You can’t! Base64 encoded data can contain null characters, which C string processing functions interpret as end-of-string.

Use memcpy instead of str[n]cpy, memcmp instead of strcmp, etc. These functions require you to know your data size, but I believe that you do know it.

Also if you’re not very confident about C-style strings and such, there’s plenty of information to be found about the topic here.