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How To use XP_CRYPT GUI
Introduction
What is XP_CRYPT
System requirements
Free version limitations
End user license agreement
Installing XP_CRYPT
Installation procedure
Activation
XP_CRYPT API
What's new
Encryption methods overview
Session
xp_crypt_set_var
xp_crypt_get_var
xp_crypt_close_session
xp_crypt_init_session
xp_crypt_set_option
Asymmetric keys
DSA
xp_dsa_free_key
xp_dsa_load_key
xp_dsa_save_key
xp_dsa_generate_couple
RSA
xp_rsa_generate_couple
xp_rsa_generate_pub_key
xp_rsa_load_key
xp_rsa_priv_dec
xp_rsa_pub_enc
xp_rsa_save_key
xp_rsa_free_key
Digital signatures
DSA
xp_dsa_verify
xp_dsa_sign
RSA
xp_rsa_sign
xp_rsa_verify
Hashing
xp_crypt
xp_md5
xp_sha1
Symmetric encryption
AES128
xp_aes128_decrypt
xp_aes128_encrypt
AES
xp_aes_decrypt
xp_aes_encrypt
DESX
xp_desx_decrypt
xp_desx_encrypt
RC4
xp_rc4_decrypt
xp_rc4_encrypt
Triple DES
xp_des3_encrypt
xp_des3_decrypt
Error codes
Tutorial
How to use GUI
Advanced technique (Old)
Table encryption (Old)
Troubleshooting
Troubleshooting overview

xp_md5

Calculates MD5 hash of the given string accordingly to RFC1321

Syntax

xp_md5  variable1 [, variable2 , variable3 ...], @hash OUTPUT

Arguments

text

VARCHAR. Source text

hash

VARCHAR or VARBINARY. Variable that holds the hash value. It has a constant size of 32 chars.

Permissions

Execute permissions default to the public role.

Return Code Values

0 - success, or Error code if failed. hash IS NOT NULL  (success) or IS NULL  (failure)

Example
declare @encrypted_password varchar(32)  
-- Output result should not be less then 40 chars
declare @clear_password varchar(16)
select @clear_password='abc'

exec xp_md5 @clear_password,@encrypted_password OUTPUT
select @encrypted_password

The output should be :

----------------------------------------
900150983cd24fb0d6963f7d28e17f72

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