| d9898ee8 |
1 | |
| 2 | /* |
| 3 | ** Copyright 1998 - 2006 Double Precision, Inc. See COPYING for |
| 4 | ** distribution information. |
| 5 | */ |
| 6 | |
| 7 | #include "courier_auth_config.h" |
| 8 | #include "random128/random128.h" |
| 9 | #include "courierauthsasl.h" |
| 10 | #include <stdlib.h> |
| 11 | #include <string.h> |
| 12 | #if HAVE_UNISTD_H |
| 13 | #include <unistd.h> |
| 14 | #endif |
| 15 | #include <ctype.h> |
| 16 | #include <stdio.h> |
| 17 | #include <errno.h> |
| 18 | |
| 19 | extern char *strdupdefdomain(const char *userid, const char *s1, |
| 20 | const char *s2, const char *s3); |
| 21 | |
| 22 | int authsasl_cram(const char *method, const char *initresponse, |
| 23 | char *(*getresp)(const char *, void *), |
| 24 | void *callback_arg, |
| 25 | char **authtype, |
| 26 | char **authdata) |
| 27 | { |
| 28 | const char *randtoken; |
| 29 | char hostnamebuf[256]; |
| 30 | char *challenge; |
| 31 | char *challenge_base64; |
| 32 | char *response; |
| 33 | char *chrsp; |
| 34 | char *q, *r, *s, *t; |
| 35 | int plen; |
| 36 | |
| 37 | if (initresponse && *initresponse) |
| 38 | { |
| 39 | if (write(2, "authsasl_cram: invalid request.\n", 32) < 0) |
| 40 | ; /* ignore gcc warning */ |
| 41 | return (AUTHSASL_ERROR); |
| 42 | } |
| 43 | |
| 44 | randtoken=random128(); |
| 45 | hostnamebuf[0]=0; |
| 46 | if (gethostname(hostnamebuf, sizeof(hostnamebuf)-1)) |
| 47 | strcpy(hostnamebuf, "cram"); |
| 48 | |
| 49 | challenge=malloc(strlen(randtoken)+strlen(hostnamebuf) |
| 50 | +sizeof("<@>")); |
| 51 | if (!challenge) |
| 52 | { |
| 53 | perror("malloc"); |
| 54 | return (AUTHSASL_ERROR); |
| 55 | } |
| 56 | strcat(strcat(strcat(strcat(strcpy(challenge, "<"), |
| 57 | randtoken), "@"), hostnamebuf), ">"); |
| 58 | |
| 59 | challenge_base64=authsasl_tobase64(challenge, -1); |
| 60 | free(challenge); |
| 61 | if (!challenge_base64) |
| 62 | { |
| 63 | perror("malloc"); |
| 64 | return (AUTHSASL_ERROR); |
| 65 | } |
| 66 | |
| 67 | response=getresp(challenge_base64, callback_arg); |
| 68 | if (!response) |
| 69 | { |
| 70 | free(challenge_base64); |
| 71 | return (AUTHSASL_ERROR); |
| 72 | } |
| 73 | |
| 74 | if (*response == '*') |
| 75 | { |
| 76 | free(challenge_base64); |
| 77 | free(response); |
| 78 | return (AUTHSASL_ABORTED); |
| 79 | } |
| 80 | |
| 81 | /* If DEFDOMAIN is set, pick apart the response and reassemble |
| 82 | * it, potentially with a default domain appended to the username */ |
| 83 | q=getenv("DEFDOMAIN"); |
| 84 | if (q && q[0]) |
| 85 | { |
| 86 | r = 0; |
| 87 | if ( (plen = authsasl_frombase64(response)) > 0 && |
| 88 | (response[plen]=0, (s = strchr(response, ' ')) != 0) && |
| 89 | (*s++ = 0, (t = strdupdefdomain(response, " ", s, "")) != 0) ) |
| 90 | { |
| 91 | r = authsasl_tobase64(t, -1); |
| 92 | free(t); |
| 93 | } |
| 94 | free(response); |
| 95 | if ((response = r) == 0) |
| 96 | { |
| 97 | free(challenge_base64); |
| 98 | return (AUTHSASL_ERROR); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | chrsp=malloc(strlen(challenge_base64)+strlen(response)+3); |
| 103 | if (!chrsp) |
| 104 | { |
| 105 | free(challenge_base64); |
| 106 | free(response); |
| 107 | perror("malloc"); |
| 108 | return (AUTHSASL_ERROR); |
| 109 | } |
| 110 | |
| 111 | strcat(strcat(strcat(strcpy(chrsp, challenge_base64), "\n"), |
| 112 | response), "\n"); |
| 113 | free(challenge_base64); |
| 114 | free(response); |
| 115 | |
| 116 | if ( (*authtype=malloc(strlen(method)+1)) == 0) |
| 117 | { |
| 118 | free(chrsp); |
| 119 | perror("malloc"); |
| 120 | return (AUTHSASL_ERROR); |
| 121 | } |
| 122 | strcpy( *authtype, method ); |
| 123 | *authdata=chrsp; |
| 124 | |
| 125 | for (chrsp= *authtype; *chrsp; chrsp++) |
| 126 | *chrsp= tolower( (int)(unsigned char)*chrsp ); |
| 127 | |
| 128 | return (AUTHSASL_OK); |
| 129 | } |
HCoop / hcoop / debian / courier-authlib.git / blame