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curl_schannel.c: Fixed caching more data than required 

Do not fill the decrypted data buffer with more data unless
required in order to return the requested amount of data.
This commit is contained in:
Marc Hoersken 2012-10-06 15:47:14 +02:00
parent fbf3560886
commit a5b6f91e8d
1 changed files with 9 additions and 1 deletions
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10
lib/curl_schannel.c
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@ -863,7 +863,8 @@ schannel_recv(struct connectdata *conn, int sockindex,
connssl->encdata_offset, connssl->encdata_length);
/* check if we still have some data in our buffers */
while(connssl->encdata_offset > 0 && sspi_status == SEC_E_OK) {
while(connssl->encdata_offset > 0 && sspi_status == SEC_E_OK &&
connssl->decdata_offset < len) {
/* prepare data buffer for DecryptMessage call */
InitSecBuffer(&inbuf[0], SECBUFFER_DATA, connssl->encdata_buffer,
curlx_uztoul(connssl->encdata_offset));
@ -970,6 +971,9 @@ schannel_recv(struct connectdata *conn, int sockindex,
}
}
infof(data, "schannel: decrypted data buffer: offset %zu length %zu\n",
connssl->decdata_offset, connssl->decdata_length);
/* copy requested decrypted data to supplied buffer */
size = len < connssl->decdata_offset ? len : connssl->decdata_offset;
if(size > 0) {
@ -980,6 +984,10 @@ schannel_recv(struct connectdata *conn, int sockindex,
memmove(connssl->decdata_buffer, connssl->decdata_buffer + size,
connssl->decdata_offset - size);
connssl->decdata_offset -= size;
infof(data, "schannel: decrypted data returned %zd\n", size);
infof(data, "schannel: decrypted data buffer: offset %zu length %zu\n",
connssl->decdata_offset, connssl->decdata_length);
}
/* check if the server closed the connection */