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Diffstat (limited to 'crypto/heimdal/lib/krb5/krb5_create_checksum.3')
| -rw-r--r-- | crypto/heimdal/lib/krb5/krb5_create_checksum.3 | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/krb5/krb5_create_checksum.3 b/crypto/heimdal/lib/krb5/krb5_create_checksum.3 new file mode 100644 index 0000000..e2362a9 --- /dev/null +++ b/crypto/heimdal/lib/krb5/krb5_create_checksum.3 @@ -0,0 +1,68 @@ +.\" Copyright (c) 1999 Kungliga Tekniska Högskolan +.\" $Id: krb5_create_checksum.3,v 1.1 1999/04/18 13:47:11 joda Exp $ +.Dd April 7, 1999 +.Dt NAME 3 +.Os HEIMDAL +.Sh NAME +.Nm krb5_checksum_is_collision_proof , +.Nm krb5_checksum_is_keyed , +.Nm krb5_checksumsize , +.Nm krb5_create_checksum , +.Nm krb5_verify_checksum +.Nd creates and verifies checksums +.Sh SYNOPSIS +.Fd #include <krb5.h> + +.Ft krb5_error_code +.Fn krb5_create_checksum "krb5_context context" "krb5_crypto crypto" "unsigned usage_or_type" "void *data" "size_t len" "Checksum *result" + +.Ft krb5_error_code +.Fn krb5_verify_checksum "krb5_context context" "krb5_crypto crypto" "krb5_key_usage usage" "void *data" "size_t len" "Checksum *cksum" + +.Ft krb5_boolean +.Fn krb5_checksum_is_collision_proof "krb5_context context" "krb5_cksumtype type" + +.Ft krb5_boolean +.Fn krb5_checksum_is_keyed "krb5_context context" "krb5_cksumtype type" + +.Sh DESCRIPTION +These functions are used to create and verify checksums. +.Fn krb5_create_checksum +creates a checksum of the specified data, and puts it in +.Fa result . +If +.Fa crypto +is +.Dv NULL , +.Fa usage_or_type +specifies the checksum type to use; it must not be keyed. Otherwise +.Fa crypto +is an encryption context created by +.Fn krb5_crypto_init , +and +.Fa usage_or_type +specifies a key-usage. +.Pp +.Fn krb5_verify_checksum +verifies the +.Fa checksum , +against the provided data. +.Pp +.Fn krb5_checksum_is_collision_proof +returns true is the specified checksum is collision proof (that it's +very unlikely that two strings has the same hash value, and that it's +hard to find two strings that has the same hash). Examples of +collision proof checksums are MD5, and SHA1, while CRC32 is not. +.Pp +.Fn krb5_checksum_is_keyed +returns true if the specified checksum type is keyed (that the hash +value is a function of both the data, and a separate key). Examples of +keyed hash algorithms are HMAC-SHA1-DES3, and RSA-MD5-DES. The +.Dq plain +hash functions MD5, and SHA1 are not keyed. + +.\" .Sh EXAMPLE +.\" .Sh BUGS +.Sh SEE ALSO +.Xr krb5_crypto_init 3 , +.Xr krb5_encrypt 3 |
