SFTP to Azure storage blob break from 1.11.0 to 1.11.1 #1593
Description
Describe the bug
SFTP to Azure Storage blob using curl stopped working when we updated from libssh2 1.11.0 to libssh2 1.11.1
I wrote a standalone C application that uses SFTP via libssh2 and confirmed the issue.
To Reproduce
curl -k --user USERNAME sftp://STORAGENAME.blob.core.windows.net
curl: (2) Failure establishing ssh session: -8, Unable to exchange encryption keys
Expected behavior
SFTP connection established
Version (please complete the following information):
- debian based Linux distribution
- libssh2 version: 1.11.1
Additional context
Not working: libssh2 1.11.1
Client-supported KEX algorithms (API):
curve25519-sha256
[email protected]
ecdh-sha2-nistp256
ecdh-sha2-nistp384
ecdh-sha2-nistp521
diffie-hellman-group-exchange-sha256
diffie-hellman-group16-sha512
diffie-hellman-group18-sha512
diffie-hellman-group14-sha256
diffie-hellman-group14-sha1
diffie-hellman-group1-sha1
diffie-hellman-group-exchange-sha1
ext-info-c
[email protected]
Key exchange failed: return code=-8, libssh2_error=-8
Message: Unable to exchange encryption keysWorking: libssh2 1.11.0
Client-supported KEX algorithms (API):
curve25519-sha256
[email protected]
ecdh-sha2-nistp256
ecdh-sha2-nistp384
ecdh-sha2-nistp521
diffie-hellman-group-exchange-sha256
diffie-hellman-group16-sha512
diffie-hellman-group18-sha512
diffie-hellman-group14-sha256
diffie-hellman-group14-sha1
diffie-hellman-group1-sha1
diffie-hellman-group-exchange-sha1Seems like no KEX were removed between 1.11.0 and 1.11.1, instead there are 2 additional ones.
Edit:
Trace output:
libssh2_trace.txt