81 lines
2.8 KiB
Markdown
81 lines
2.8 KiB
Markdown
-----
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isHidden: false
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menupriority: 1
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kind: article
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created_at: 2010-09-02T00:02:17+02:00
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fr: title: base64 et sha1 sur iPhone
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en: title: base64 and sha1 on iPhone
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author_name: Yann Esposito
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author_uri: yannesposito.com
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tags:
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- iPhone
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- Objective-C
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en: - programming
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fr: - programmation
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-----
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fr: Allons directement à l'essentiel :
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fr: voici deux fonctions à intégrer à votre application iPhone pour afficher l'encodage en base64 ou en hexadecimal du hash sha1 d'un string en Objective-C pour iPhone.
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en: Lets be straight:
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en: here are two functions to add to your code to have `base64` and `hexadecimal` version of the `sha1` hash of an NSString.
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fr: Pour l'usage c'est très simple, copiez le code dans la classe de votre choix.
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fr: Puis :
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en: To use it, simply copy the code in your class and use as this:
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<code class="objective-c">
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#import <CommonCrypto/CommonDigest.h>
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...
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NSString *b64_hash = [self b64_sha1:@"some NSString to be sha1'ed"];
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...
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NSString *hex_hash = [self hex_sha1:@"some NSString to be sha1'ed"];
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</code>
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en: The `base64` algorithm must be programmed by hand on iPhone!
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fr: L'algorithme pour l'encodage en `base64` doit être programmé sur iPhone.
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fr: Il n'y a pas de librairie officielle qui s'occupe de ça.
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<code class="c" file="iphone_base64_sha1.c">
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- (unsigned char *)sha1:(NSString *)baseString result:(unsigned char *)result {
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char *c_baseString=(char *)[baseString UTF8String];
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CC_SHA1(c_baseString, strlen(c_baseString), result);
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return result;
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}
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- (NSString *)base64:(unsigned char *)result {
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NSString *password=[[NSString alloc] init];
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static const unsigned char cb64[65]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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for (int i=0; i<CC_SHA1_DIGEST_LENGTH; i+=3) {
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password=[password stringByAppendingFormat:@"%c%c%c%c",
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cb64[(result[i] &0xFC)>>2],
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cb64[((result[i] & 0x03) << 4)
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| ((result[i + 1] & 0xF0) >> 4)],
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cb64[((result[i + 1] & 0x0F) << 2)
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| ((result[i + 2] & 0xC0) >> 6)],
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cb64[result[i+2]&0x3F]
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];
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}
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return password;
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}
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- (NSString *)hexadecimalRepresentation:(unsigned char *)result {
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NSString *password=[[NSString alloc] init];
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for (int i=0; i<CC_SHA1_DIGEST_LENGTH; i++) {
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password=[password stringByAppendingFormat:@"%02x", result[i]];
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}
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return password;
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}
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- (NSString *)b64_sha1:(NSString *)inputString {
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unsigned char result[CC_SHA1_DIGEST_LENGTH+1];
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[self sha1:inputString result:result];
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return [self base64:result];
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}
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- (NSString *)hex_sha1:(NSString *)inputString {
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unsigned char result[CC_SHA1_DIGEST_LENGTH+1];
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[self sha1:inputString result:result];
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return [self hexadecimalRepresentation:result];
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}
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</code>
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