| c++ Programming Glossary: len_outCan you help me get my head around openssl public key encryption with rsa.h in c++? http://stackoverflow.com/questions/2012645/can-you-help-me-get-my-head-around-openssl-public-key-encryption-with-rsa-h-in-c  char buffer_out 4096 EVP_MAX_IV_LENGTH size_t len int len_out unsigned char ek int eklen uint32_t eklen_n unsigned char iv.. sizeof buffer in_file 0  if EVP_SealUpdate ctx buffer_out len_out buffer len  fprintf stderr EVP_SealUpdate failed. n  retval.. failed. n  retval 3 goto out_free  if fwrite buffer_out len_out 1 out_file 1  perror output file  retval 5 goto out_free  if.. 
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